Wasa July-August 2017 full magazine

Promoting professional excellence in the water sector

Water& Sanitation The official magazine of the Water Institute of Southern Africa

Complete water resource and wastewater management

Africa

VEOLIA

Taking the next step

pipes, Pumps & valves When asbestos leaves you breathless

Trenchless Technology

SASTT readies for No-Dig 2018

Mine water

New atlas to improve decision-making

July/August 2017 • ISSN 1990-8857 • R50.00 (incl. VAT) • Vol. 12 No. 4

The people keeping it clean Heavy industry is a critical part of our economy. But disposing of the waste they produce in a way that’s safe for people and the environment takes years of expertise, scientific savvy and biochemistry knowledge.

Not just anyone can do it. That’s why EnviroServ employs qualified professionals for the job.

Like our Sales Consultant, Roxanne, who is just as passionate about protecting the planet as you are.

In her spare time she enjoys running and hiking. Which means helping to protect the environment is in her best interest.

With four years’ experience at EnviroServ, she’s the right person for this demanding job and takes pride in working for a compliant operation.

Because expertise is one thing, but employees who live the EnviroServ values of passion and integrity are dedicated to working towards delivering waste solutions that are environmentally responsible and effective.

JULY /AUGUST 2017

Vol. 12 No. 4

CONTENTS

commit

TTERS, RELY ON US

Promoting professional excellence in the water sector

Water& Sanitation The official magazine of the Water Institute of Southern Africa

Complete water resource and wastewater management

Africa

22 | +27 (0)82 574 4180

OF FABRICATED DS, TEES, STUBS ND REDUCERS

VEOLIA

CERTIFIED HDPE PIPES

Taking the next step

HDPE PIPE Manufacturers & Fabricators

PIPES, PUMPS & VALVES When asbestos leaves you breathless

TRENCHLESS TECHNOLOGY

SASTT readies for No-Dig 2018

MINE WATER

New atlas to improve decision-making

July/August 2017 • ISSN 1990-8857 • R50.00 (incl. VAT) • Vol. 12 No. 4

ON THE COvER A groundbreaking construction technique with a track record of 32 years ON4 100 THE COVER and projects promises lasting Veoliaperformance is entering in the all civil structures, from next chapter in its dams to reservoirs, canals, history.and Themore. water clarifiers Read solutions more to findspecialist out how tois laying a newP4 global beat sickout concrete.

vision that will enhance its ability to respond to Africa’s water treatment requirements. P4

21 Mine Water

Regulars

Editor’s comment Industry news

3 51

26

WISA

CEO’s comment 6 President’s comment 7 YWP 9 Events 56

Women in Water

Leading transformation Vision for success

Industrial Water

Treatment technology now

Mine Water

New atlas to improve decision-making Choosing the right filtration technology

Trenchless Technology

SASTT readies for No-Dig 2018 Drakenstein: bulk sewer line Hard rock rules Experience makes the difference

Pipes, Pumps & Valves

When asbestos leaves you breathless

Trenchless Technology

12 15

17

19 21

23 26 29 31

32 Pipes, Pumps & Valves

32

Panel Discussion

Grundfos 37 Macsteel Fluid Control 39 Pexmart 41

Service Delivery

Rural water supply in SA A stitch in time

42 45

Odour Control

Biotechnology integration 47 QFS 49 infrastructure news

infrastructure4

www.infrastructurene.ws

47 Odour Control

Providing

clean water and

sanitation services to

Johannesburg Johannesburg Water is a municipal entity, wholly owned by the City of Johannesburg Metropolitan Municipality as a sole shareholder to provide water and sanitation services .

The entity supplies 1,574 Ml/day of potable drinking water, procured from Rand Water, through a distribution network of 12,581 km, 116 operational reservoirs, water towers and 35 water pump stations. The spent wastewater is then collected and reticulated via a wastewater network and treats 973 Ml/day of sewage at its six wastewater treatment works of which two of its biogas-to energy plants which convert methane gas to energy are located.

We are determined to deliver a sustainable, affordable and cost effective service. In the last financial year (2015/16) our response to water bursts improved from 81% in 2014/15 to 84.29%. We have also managed to reduce water consumption in Johannesburg from 320 litres per person per day to 309 litres through our water demand strategy. We invite you to be an active partner in protecting our precious pipe network and assets. Report any form of vandalism and theft of water infrastructure to 0800 00 25 87.

City of Johannesburg Johannesburg Water (SOC) Ltd 17 Harrison Street Marshalltown Johannesburg

PO Box 61542 South Africa 2107

Tel +27 (0) 11 688 1400 www.johannesburgwater.co.za 24 Hour Water Hotline 011 375 5555 / 0860 - JOBURG or 0860 562 874 JW SMS Line : 082 653 2143 email: customer@jwater.co.za Providing Water. Providing Life

@jhbwater

Johannesburg Water

Publisher Elizabeth Shorten Managing editor Alastair Currie Editor Frances Ringwood Head of design Beren Bauermeister Designer Ramon Chinian Chief sub-editor Tristan Snijders Sub-editor Morgan Carter Contributors Jo Burgess, MO Dinka, Lester Goldman, Stuart Hawkins, Mpho Muloiwa, Valerie Naidoo, Shanna Nienaber, Caliphs Zvinowanda Head: Digital marketing Roxanne Segers Client services & production manager Antois-Leigh Botma Production coordinator Jacqueline Modise Distribution manager Nomsa Masina Distribution coordinator Asha Pursotham Financial manager Andrew Lobban Administration Tonya Hebenton Printers United Litho Johannesburg t +27 (0)11 402 0571 Advertising sales Avé Delport / Jenny Miller t +27 (0)11 467 6223 avedel@lantic.net / jennymiller@lantic.net

editor’s COMMENT

Mining swings and maize roundabouts

T

he day after South Africa was declared as being in a technical recession, the Southern African Vinyls Association (SAVA) held Vinyl SA 2017, this year’s annual conference, where economist Gerhard Kuhn from the Industrial Development Corporation (IDC) delivered a presentation on the general economic outlook. Here’s a snapshot of his most salient points for the water sector.

Publisher

Physical address: No 9, 3rd Avenue, Rivonia, 2191 Postal address: PO Box 92026, Norwood, 2117, South Africa t +27 (0)11 233 2600 • f +27 (0)11 234 7274/5 frances@3smedia.co.za ISSN: 1990 - 8857 Annual subscription: R300 (SA rate) subs@3smedia.co.za Copyright 2017. All rights reserved. All articles herein are

Mining and agriculture According to Kuhn, “The South African economy entered its first recession since 2009 as real GDP contracted by 0.7% in Q1 2017 (-0.3% in Q4 2016).

Excluding agriculture and mining, the contraction would have been 2.2%.”

However, improved weather conditions in the interior have led to higher agricultural output during the 2016/17 season. “It must be remembered this comes off a very low base,” he added.

Maize in particular has recovered well.

Although mining production rebounded, the sector is facing some challenges. “Gold production continues on a long-term declining trend, while coal output dropped sharply as demand conditions weakened.

Platinum and iron ore production rebounded, albeit from very low bases, but demand conditions remain largely unfavourable,” Kuhn explains.

copyright protected and may not be reproduced either in whole or in part without the prior written permission of the publishers. The views of contributors do not necessarily reflect those of the Water Institute of Southern Africa or the publishers.

www.ewisa.co.za WISA contacts: Head office Tel: 086 111 9472(WISA) Fax: +27 (0)11 315 1258 Physical address: 1st Floor, Building 5, Constantia Park, 546 16th Road, Randjiespark Ext 7, Midrand BRANCHES Eastern Cape Chairperson: Selby Thabethe Tel: +27 (0)41 506 2862 | Email: ssthabethe@vodamail.co.za Secretary: Christopher Maduma Tel: +27 (0)41 506 7527 | Email: cmaduma@mandelametro.gov.za Free State Chairperson: Sabelo Mkhize Tel: +27 (0)53 830 6681 | Email: smkhize@solplaatje.org.za Secretary: Noeline Basson Cell: +27 (0)71 362 3622 | Email: ndb@malachi3.co.za KwaZulu-Natal Chairperson: Vishnu Mabeer Tel: +27 (0)31 311 8684 | Email: vishnu.mabeer@durban.gov.za Treasurer: Renelle Pillay Email: PillayR@dws.gov.za

Government debt The South African government’s debt is closely monitored by credit rating agencies. Kuhn says that these agencies have been expressing concerns

Limpopo Chairperson: Paradise Shilowa Cell: +27 (0)79 905 9013 | Email: paradises@polokwane.gov.za Secretary: Salome Sathege Tel: +27 (0)15 290 2535 | Email: salomes@polokwane.gov.za Mpumalanga Chairperson: Susan van Heerden Cell: +27 (0)82 800 3137 | Email: susanvanhd@gmail.com Secretary: Theo Dormehl Cell: +27 (0)83 294 0745 | Email: dormehl@soft.co.za Namibia Chairperson: Dr Vaino Shivute Secretary: Kristina Afomso Tel: +264 61 712080 | Email: afomsok@namwater.com.na Western Cape Chairperson: Natasia van Binsbergen Tel: +27 (0)21 448 6340 | Email: natasia@alabbott.co.za Secretary: Wilma Grebe Tel: +27 (0)21 887 7161 | Email: wgrebe@wamsys.co.za

Dare to commit WHEN PERFORMANCE MATTERS, RELY ON US Gauteng: +27 (0)82 909 1622 Natal: +27 (0)64 683 3324 Eastern Cape | Free state: +27 (0)84 446 6384 Cape Province | Northern Cape: +27 (0)82 574 4180 Limpopo | North West | Mpumalanga: +27 (0)82 909 1622 | +27 (0)82 574 4180

Promoting professional excellence in the water sector

Water& Sanitation The official magazine of the Water Institute of Southern Africa

Complete water resource and wastewater management

Africa

about the high and increasing government guarantees to financially vulnerable SOEs, as this may affect fiscal consolidation efforts. “In value terms, gross loan debt measured R2.2 trillion by December 2016 – an increase of 94% in the past five years. Gross loan debt stood at 51.7% of GDP by Q4 2016 – an all-time high. Higher government debt is resulting in rising debt-servicing costs, which have been the fastest growing expenditure item in recent years.

At an estimated R146.3 billion in the 2016/17 fiscal year, debt service costs claim a share of 11.2% of total government expenditure – the highest in 11 years. Further downgrades could follow if government is not able to stabilise the debt-to-GDP ratio.”

Staying optimistic Also presenting at Vinyl SA 2017 was Peter Willis, sustainability guru and owner of Conversations that Count, who gave a very different presentation asking guests to tap out of their task-driven thinking and instead allow their intuition and humanity to take the reins from time to time.

Yes, there may well be tough economic times ahead (though not necessarily as bad as many might fear) but, even so, it’s always good to remember to read a room, show empathy and generally keep up the small courtesies and practices of decency that reflect our better angels.

Cover opportunity

VEOLIA

SUSTAINABLE BUSINESS PRACTICES

FULL RANGE OF FABRICATED FITTINGS, BENDS, TEES, STUBS & FLANGE AND REDUCERS

CERTIFIED HDPE PIPES

Taking the next step

HDPE PIPE Manufacturers & Fabricators

PIPES, PUMPS & VALVES When asbestos leaves you breathless

TRENCHLESS TECHNOLOGY

SASTT readies for No-Dig 2018

MINE WATER

New atlas to improve decision-making

CONTACT US: +27 (0)31 736 1055

www.inkuluplastics.co.za

WISA’s Vision The promotion of professional excellence in the water sector, through building expertise, sharing knowledge and improving quality of life.

July/August 2017 • ISSN 1990-8857 • R50.00 (incl. VAT) • Vol. 12 No. 4

Endorsed by

In each issue, Water&Sanitation Africa offers companies the opportunity to get to the front of the line by placing a company, product or service on the front cover of the magazine. Buying this position will afford the advertiser the cover story and maximum exposure. For more information on cover bookings, contact Jenny Miller on +27 (0)11 467 6223, or email jennymiller@lantic.net.

j ul y / a u g u s t 2017

3

Ambitions for Africa

New goals

new strategy

In unveiling its new ‘Africa Organisation’, Veolia Water Technologies has entered the next chapter in its history. The water solutions specialist is laying out a new global vision that will enhance its ability to respond to Africa’s water treatment requirements.

A

mbitions for Africa, a central growth initiative within Veolia Water Technologies’ Transformation Plan describes a range of organisational and technological innovations aimed at increasing Africa’s access to highly efficient, low-footprint treatment technologies through streamlined manufacturing, distribution and service networks. “The Africa Organisation embraces a new platform of shared services between strategic anchor areas in Africa, including Southern Africa, and Veolia in Europe, enhancing our ability to offer global technology solutions within localised service, support and management structures,” explains Gunter Rencken, managing director, Veolia Water Technologies South Africa.

Aligned with this new organisational framework is the launch of an exciting Standard Product Portfolio, designed to provide reliable plug-and-play water treatment solutions with fast turnaround times for industrial and municipal water treatment requirements in Africa.

“Our standard products comprise a range of packaged solutions of adapted Veolia products and technologies for specific market bases in Africa,” Rencken explains. These include treatment

4

jul y /aug ust 2017

solutions for municipal drinking water and wastewater, industrial process water and wastewater, agriculture, aquaculture, power generation, mining, pharmaceuticals and food and beverage.

“Designed to meet the economic and operational realities of increasing the continent’s water security, our standard product range facilitates the provision of proven treatment solutions with short lead times through an enhanced African distribution and service network.”

African manufacturing platform Veolia South Africa plays a critical role within this structure as a key technology and manufacturing hub for a range of standard products, and will provide a vital engineering and manufacturing platform to drive this new African strategy.

To meet the increased demand for water and wastewater solutions, the company has implemented a new organisational structure that will strengthen its core business solutions across design and build, standard products, chemical products and operations and maintenance services in line with local and African market demands. This includes up-scaling production plants for the standard packaged products and chemicals divisions in Johannesburg, while streamlining the organisational efficiencies, engineering and project execution of Veolia’s design and build unit, for enhanced customer service.

South Africa is a key manufacturing hub for the group’s standard packaged products and trademarked Hydrex speciality chemical products From its new production facility in Sebenza, Veolia will significantly increase its output of standard packaged products to meet the burgeoning market demands for the company’s modular plants. “In 2016, we supplied a record number of

COVER STORY

modular plants to industries and municipalities,” says Chris Braybrooke, general manager: Marketing. “These innovations are a game changer for meeting water treatment requirements in Africa, with proven off-the-shelf technologies that can be rapidly deployed to respond to urgent requirements.” While the modular plant also offers an intrinsic mobility, Veolia has taken this a step further with a new, uniquely African innovation.

Designed and manufactured in South Africa, the fully mobile, truck-mounted modular plant, which can be equipped with any of the company’s treatment technologies, offers dramatic efficiency improvements in responding to varying water challenges and emergency situations over regular tankers ferrying water or dealing with waste. The first of these plants was supplied by Veolia in 2016 as part of a solution that included four truck-mounted water treatment plants supplying potable water to various communities across Lesotho.

“This is an example of our local engineering services catering to the situational needs of African markets,

with specific technological modifications designed to the African context, while still meeting international quality standards,” Braybrooke says. In addition to the new standard packaged products facility, rapid growth in the speciality chemicals market has required Veolia to increase its chemical manufacturing output.

The new chemical manufacturing facility, which will significantly increase the production output of the current plant, will exceed all current compliance requirements, with further ISO and international certifications being made possible. This state-of-the-art facility will serve as a production platform for the supply of Veolia’s Hydrex speciality chemicals range to Africa. Chemicals are also a central component of the company’s operations and maintenance offerings. This service is helping

customers increase their profitability and efficiency by allowing Veolia to run their on-site water treatment requirements while customers focus on their core production activities.

“At a number of municipal and industrial plants, ongoing operations and maintenance contracts have helped clients lower overall treatment costs across the water cycle through both reduced energy and chemical consumption,” Braybrooke continues.

Innovating sustainability Today, Veolia’s technologies, such as the trademarked Biothane Memthane®, Biobed®, Upthane® and its clarification range of ActiFlo® and Multiflo® mean, water reuse and the harvesting of biogas are becoming increasingly profitable, rejuvenating both municipal and industrial budgets.

“At a recent dairy plant project in South Africa, for example, we supplied a 1 500 m3/day Memthane® anaerobic membrane bio-reactor to treat the plant’s high-oxygen-demand wastewater in such a way that enables water to be recycled internally, methane harvested and incinerated in boilers and dried

biomass sold as fertiliser. This delivers a significant total operating cost reduction compared to conventional technologies, and demonstrates how our technology is reconceptualising waste products as valuable resources that can lower

costs and improve our sustainability,” says Braybrooke.

Veolia is ready, as a technology vendor, to partner with industry and municipalities in helping them overcome risks to water security.

Another important pillar of consolidating future water security lies in desalination technology. While still more expensive than conventional water sources, it does provide a secure solution for potable water production from either seawater or brackish water, where other options are limited.

Veolia is the leading provider of desalination technology in South Africa, having constructed seven seawater desalination plants across the country to date, including the country’s largest at Mossel Bay (at 15 Mℓ/day). It has also supplied brackish water desalination systems to Sasol, Impala Platinum, Eskom and a number of other industrial companies.

Empowering Africa Alongside the capital and structural investments enabling Veolia to grow its African ambitions is the company’s social investment mandate. As Rencken explains, “We are currently increasing our commitment to BBBEE in South Africa, with a new shareholding arrangement between Veolia and a local black partner currently being finalised, which will be concluded by August 2017.”

www.veoliawatertechnologies.co.za j ul y / a u g u s t 2017

5

CEO's Comment

WISA

Implementing leadership

T

capacity to add tremendous value. We have to accept that without all sector partners working together, we all face an increasing crisis. We may not always agree on the path, but I know we all agree on the destination.

Planning better We need to focus even more on the infrastructural planning of housing, commerce, industry and agriculture, which will require the increasing and prompt provision of bulk water and wastewater infrastructure. Crumbling infrastructure contributes to leaks and bursts, and these need to be addressed with properly resourced asset management programmes and technical capability. In addition, municipalities face unaccounted-for water that is higher than best practice. Any non-compliance of effluent from treatment works needs to be addressed. The contamination of catchments and groundwater resources is an ongoing concern.

It is nothing new to say that technical and managerial skills are required to mitigate some of these challenges. These skills need to be critically reviewed.

Investments in projects and services have to be part of a sector-driven plan.

Key sector partners are not consulted sufficiently, yet have the desire and

Fostering dialogue At WISA, we have knowledgeable members that can contribute to the much-needed dialogue and discourse.

We ask that the relevant partners work with us to ensure that we can provide improved water security and quality.

Meanwhile, WISA must ensure that our organisational structure is able to leverage our members’ skills and improve as an organisation. The recently released King 4 report now places additional emphasis and requirements on organisations like ours. We have to change and adapt, despite the pain it may bring. Governance and leadership are not things we must strive for, but rather things we must implement, and provide examples of to others within the sector. Of course, without our volunteers, this task can never be accomplished. We thank all the WISA volunteers sincerely, and also request more members to assist us in being the change that this sector needs.

I sincerely thank the office-bearers, committee members and volunteers of the various WISA organisational structures for their devotion and commitment to WISA and the water sector.

I thank the WISA head office staff, and also our service providers for their commitment to learning and change.

With this renewed confidence and these sharpened skills, we have seen tremendous growth and improvement in our customer satisfaction, and the effectiveness and efficiency of all our organisational units. Let’s turn our water sector dreams into reality.

he Water Institute of Southern Africa’s critical role in South Africa’s water sector, along with its members, has never been more important. We currently face a serious water crisis, and many parts of the country face a serious water security catastrophe.

Coupled with this, some of the many challenges that still confront us include: access to water and sanitation, as well as the security and quality thereof; poor or low levels of community service, coupled with inadequate planning and infrastructure management; strategic legislative and policy requirements; sectoral education and capacity challenges; and public health risks and environmental degradation caused by contaminated urban run-off.

6

jul y /aug ust 2017

Overcoming the water security catastrophes that continue to plague too many of South Africa’s municipalities will require water sector professionals to continually sharpen their skills and engage in robust dialogue about governance, leadership, water security and more.

Non-revenue water not only robs municipalities of valuable funds for improving water security, it also wastes water

Crumbling infrastructure contributes to leaks and bursts, and these need to be addressed with properly resourced asset management programmes and technical capability Dr Lester Goldman, CEO, WISA

WISA

Staying engaged The WISA AGM took place at the end of May this year at the ERWAT headquarters. Key points of observation included the continuing drought situation in some parts of the country and the start of plans for WISA 2018.

L

ast year was tough for the water sector, and 2017 has been no different. While the effects of El Niño have started to subside in some drought-hit regions like Mpumalanga, the Free State and Gauteng, the recovery in KwaZulu-Natal has been slow and the drought in the Western Cape has reached critical levels. While these times place water professionals under huge amounts of pressure, it does offer an opportunity for sector professionals to show leadership by providing effective solutions.

We need to advocate within our organisations for better planning, budgeting, skills development and the need for alternate and supplementary solutions for the future. We know, as sector professionals, that drought cycles are part of the norm.

WISA 2018 On the WISA family front, there have been several exciting events and

advancements. First, I want to take the opportunity to once again thank the local organising committee (LOC) for the 2016 conference held in Durban and WISA head office for a successful WISA 2016.

The board has been advised that the lessons learned from last year’s event are being transferred to the new LOC for the Cape Town biennial planned for 2018. At board level, we have embarked on a journey to strengthen our governance by bringing in expertise within the board, as well as investing in training and a governance workshop group to review the memorandum of incorporation and traditional accountability structures at WISA as guided by the KING 4 report.

The board has also requested a view of the changing demographics of our membership. Initial numbers show that 47% of our membership are between 20 and 40 years old, while 42% are older than 41 years. A total of 83% of our members are males,

President ’s COMMENT

WISA gives a special thanks to the Young Water Professionals as one of its most active divisions

while for the 20-to-40-year group, the male-to-female split is 55% and 45%, respectively. These initial results are extremely promising and reflective of society.

Celebrating community I want to thank those active volunteers that are supporting the various WISA divisions and branches. Between May last year and May this year, we have had knowledge-sharing activities such as workshops, conferences, training sessions and technical tours in 10 out of 12 months a year. Some of our most active divisions have been Mine Water and the Young Water Professionals (YWP).

The most active branches have been in the Western Cape, KwaZulu-Natal and

Dr Valerie Naidoo, president, WISA

j ul y / a u g u s t 2017

7

Lovibond® Water Testing Tintometer® Group

FAST FACTS

NEW!

47% of WISA’s members are between 20 and 40 years old

UV-VIS Spectrophotometer

42% are older than 41 years 83% of WISA’s members are males; for the 20-to-40-year group, the male-to-female split is 55% and 45% respectively

The board has been advised that the lessons learned from last year’s event are being transferred to the new LOC for the Cape Town biennial planned for 2018 the Eastern Cape. Speaking on behalf of the board as its chairman, we are aware that there is more work to be done in ensuring that all our divisions and branches are active in providing relevant platforms and events for information sharing and networking.

In the coming year, WISA and member volunteers will bring the sector relevant conferences like the Watersheds and River Basin Conference at the end of May, the 2nd International Peri-Urban Conference in November, the International Water Association YWP in December 2017, and all the preparation that will go into WISA 2018. Finally, thank you to all our members for supporting our events and please stay engaged and volunteer. Your expertise is invaluable to us.

and XD 7500 UV-VIS & XD 7000 VIS make premium spectrophotometry affordable ■ Premium optical system

with reference beam ■ Automatic test recognition

with internal barcode reader ■ Automatic cuvette type detection ■ More than 140 analytical methods

implemented ■ Bright colour display ■ Interfaces: Ethernet, USB

www.lovibond.com

QUALITY Made in GERMANY

Drought has continued in many of South Africa’s coastal municipalities and towns

WISA Y WP

Gearing green business

The Imvelisi Enviropreneur Programme is building the next generation of water and biodiversity businesses for South Africa. By Shanna Nienaber*

T

he natural environment presents enormous potential to grow the South African economy, small business and jobs. Water and biodiversity start-up businesses are particularly important in realising this potential. In celebration of Youth Month, the South African Young Water Professionals (YWP-ZA, a division of WISA) and GreenMatter have collaborated to pull together a group of 50 passionate, motivated, out-of-the-box young professionals who aspire to start waterand biodiversity-linked businesses.

Many entrepreneurs fail because they do not have a fully developed idea.

They have the spark of an idea – a basic product – but nothing more

The Imvelisi: Creating Enviropreneurs Programme is the initiative that makes all this happen.

Idea shaping Imvelisi is a short programme designed to provide support and guidance to aspiring young entrepreneurs through the ideation phase of business development. The programme is aimed at preparing young people who are considering start-up businesses in the water and biodiversity sector for a better understanding of what it takes to run a successful business. Many entrepreneurs fail because they do not have a fully developed idea.

They have the spark of an idea – a basic product – but nothing more.

The result is an entrepreneur who launches a product but then fails in the marketplace. This happens for a number of reasons, including a lack of understanding regarding the basic

Training at the Innovation Hub in Pretoria

business feasibility (including the costing and pricing of products); not knowing who the ideal target market is or how to approach the markets; inadequate operational processes, including financial management systems; and uncertainty about how to build relationships and manage people (including business partners, employees and clients). The Imvelisi structured process supports the aspiring entrepreneur, to interrogate the feasibility of the business concept and take practical steps towards starting and growing a business.

Imvelisi overview The programme consists of three components. First, a national call is issued where interested participants have to share their business concept and the market niche it will address. For the June training process, MAY/JUNE 2017

j ul y / a u g u s t 2017

99

The cycle of solutions – water technology by KSB Water is crucial for our survival – for every one of us, for all nations and peoples.

Clean water supplies and efficient sewage treatment have never been more important.

Prosperity and well-being depend on it, worldwide. KSB’s know-how and extensive pumps and valves product range help you meet all water supply and treatment requirements, efficiently and affordably. We are one of the few suppliers worldwide with end-to-end solutions addressing all stages of the water cycle – from water extraction to sewage treatment. www.ksb.com/cycle www.ksbpumps.co.za Tel: +27 11 876-5600

Our technology. Your success.

Pumps Valves Service n

n

WISA Y WP

TABLE 1 Imvelisi Programme particulars

Who conceptualises and coordinates the programme?

Who funds the programme?

Who is the expert training consortium leading the programme?

Imvelisi was conceptualised and is coordinated by the South African Young Water Professionals (YWP-ZA) and GreenMatter. YWP-ZA is a division of WISA and the International Water Association.

The core funding for this programme comes from the Department of Science and Technology. A range of other funding partners have come on board to support the costs of venues, catering, and technical guidance and input to the programme. These partners are the Water Research Commission, Innovation Hub and Department of Environmental Affairs.

The training and technical input to this programme is managed

by Fetola, which is working in partnership with Koi Strategy, Green Cape and the South African Renewable Energy Business Incubator.

950 applications were received and the top 50 applicants were selected. Second, short-listed participants engage in an intensive, five-day business boot camp where they get to explore their ideas and gain insight into starting a business.

Finally, 15 participants who have shown unique potential during the bootcamp are channelled into a 12-week mentorship process. All participants also join an online Imvelisi community page, to share ideas and resources and network with each other. The Imvelisi Programme is a truly multi-partner and collaborative initiative ensuring that it supports a range of exising processes and partners on the national landscape.

Getting involved The June Imvelisi participants were a truly diverse and inspiring group to work with. Participants came from all over the country, all with different education and experience backgrounds.

Together, we interrogated ideas relating to mining technology; citizen science and data; alien invasive species, secondary industries and a range of agricultural ideas; waste and water harvesting business models; food; beauty; and medical solutions derived from indigenous plants. The cross pollination of ideas around market access, logistics, costing, business niches and a range of other themes was marvellous and resulted in glowing reviews from participants.

The next round of the Imvelisi boot camp and mentorship process kicks off on 28 August 2017. Please feel free to contact the Imvelisi team on imvelisi@gmail.com if you need any further insight into this exciting programme. *Shanna Nienaber is the chair of the YWP-ZA.

WOMEN IN WATER

Leading transformation South Africa’s water sector is arguably a global leader in closing the gender equality gap but it’s not all about the numbers – women in South Africa’s water sector stand out for their stellar skills. By Frances Ringwood

Nomvula Mokonyane

Minister of Water and Sanitation

T

he number of South African women who hold senior positions in the water sector in government, the private sector, community organisations, and within the research, sciences, environmental and academic fields is remarkable.

A recent WISA internal census revealed that of 1 576 members aged 20 to 40 (and WISA membership represents a sizeable chunk of Southern Africa’s top decision-makers in the water sector), 45% were women.

But it’s not just about quantities and quotas: the women in the South African water sector boast incredible skills, learning, insight and business acumen.

The following tribute to Women in Water features just a handful of leading figures, briefly looking at their accomplishments and contributions.

Tribute to Women in Water The Department of Water and Sanitation (DWS), for example, is headed by two women – the minister, Nomvula Mokonyane, and her deputy, Pamela Tshwete. During Mokonyane’s tenure,

Pamela Tshwete Deputy Minister of Water and Sanitation

Snowi Khoza

CE of BIGEN Africa

.

she and her deputy have pushed tirelessly for radical transformation of government’s water services supply chain. Leading black South African business women whose work impacts the sector include Snowi Khoza, CE of BIGEN Africa, who is highly accomplished academically and in business.

She has been a champion of women in business throughout her career.

Another impressive black woman leader is Nonkululeko Sindane, appointed CEO at UWP Consulting in May last year, who has a background in law and experience working at Umgeni Water.

Flying the transformation flag at Alula Water, an engineering consultancy focusing on water projects, is Dinao Lerutla, director: Operations and Strategy. Also in the engineering field is Malani Padayachee-Samab, CEO of Malani Padayachee & Associates.

Padayachee-Samab was the first South African Indian woman engineer and business owner. Another highly impressive woman in this category is Allyson Lawless, MD of the South African Institute of Civil Engineering

It’s not just about quantities and quotas: the women in the South African water sector boast incredible skills, learning, insight and business acumen 12

jul y /aug ust 2017

Nonkululeko Sindane CEO at UWP Consulting

Dinao Lerutla

Director: Operations and Strategy at Alula Water

– Professional Development Projects, known for championing the professional development of South Africa’s engineers. In the sciences and research field, two leaders working at the Water Research Commission (WRC) are Valerie Naidoo, research manager: Water Use and Waste Management, and Jo Burgess, research manager: Mine Water Treatment and Management.

Both have articles published in this edition of WASA. Naidoo is the current president of WISA while Burgess is the most recent past president. In the chemistry and environmental field, Susan Cole, MD of Aqua Resources SA, is notable for having been a shining star at leading chemical companies for many years and then finally taking the plunge and becoming a local business owner selling quality water treatment products. A woman to watch is Shakera Arendze, process scientist at Rand Water and chairperson of Water Sciences for WISA. Many more There are so many inspiring women leaders in the local water sector that it is impossible to name them all, and literally hundreds have not been added to the above honour roll because of space constraints (although they

WOMEN IN WATER

belong here). This is just a snapshot of a few of the top achievers in their various fields within the sector.

Continuing inequality The UN’s SDG 5 aims to “achieve gender equality and empower all women and girls” by 2030. Key to addressing SDG 5 is the focus on challenges such as poverty, inequality and violence against women.

Malani PadayacheeSamab

CEO of Malani Padayachee & Associates

The other SDG important for the water sector is the previously mentioned SDG 6, which aims to achieve improved water and sanitation access for all. The two goals are closely related in that SDG 6 cannot be accomplished without SDG 5. If water access is to be secured for all, then it is crucial that women be involved in the relevant decision-making processes, so that their needs can be adequately met.

Allyson Lawless Valerie Naidoo MD of SAICE – Professional Development Projects

Research manager: Water Use and Waste Management at WRC

Jo Burgess

Research manager: Mine Water Treatment and Management at WRC

Celebrating successful women UN Statistics show 19% of women’s time is spent completing household activities, compared to 8% for men. It simply harder for women, especially women in developing countries, to achieve. Against these odds, South Africa’s women in water have broken down barriers to such an extent that many are already beginning to leave whole new standards for excellence as their legacy.

Susan Cole

Director and owner of Aqua Resources SA

Shakera Arendze Process scientist at Rand Water

.

WOMEN IN WATER

Vision for success Where were you born and where did you grow up?

SC I was born in Port Elizabeth, South Africa, and grew up in Johannesburg.

How did your life experiences shape your interest in the water sector?

I studied chemistry at UCT and was lucky enough to be awarded a study bursary through a chemical company called NCP. It was here that I first heard about water treatment, as the NCP Ultrafloc Division was involved in technical sales and the marketing of chemicals used for conventional water treatment. I discovered the water sector during my time at NCP and I haven’t looked back since.

What qualification and career highlights allowed you to succeed?

Two things were key – first, sales and marketing wasn’t a career I had even considered when I first looked at a chemistry career path, yet it was ideally suited for me; and second, studying chemistry allowed me to take what I love and apply it in a relevant, albeit totally different, field.

The scientific knowledge I gained was vital to me being able to do my water sector technical sales job effectively. After having completed my BSc (Honours) in Chemistry and taking up my job at NCP Ultrafloc, I studied an IMM Diploma in Marketing.

The combination of these two qualifications gave me the tools I needed to succeed.

What would you regard as the most significant achievement in your career?

My career so far has been peppered with many memorable moments and I have absolutely loved each and every one but, for me, the most significant achievement in my career was taking a step off the proverbial cliff and starting my own business. It was the most daunting thing I have ever done but I thrive on challenges and, looking back three years later, it was the best move

I could ever have made. If you don’t challenge yourself as a person, you will never grow. I am very thankful to all those people along my water path that challenged me to excel because I wouldn’t be where I am today without them.

What do you regard as the keys to your success?

I was one of the first women to pursue a career in water treatment sales and marketing 20 or so years back, and I was privileged to have many mentors to help me along my path. In recent years, I have also interacted with some really wonderful career women who guided and inspired me to grasp all opportunities that came my way with both hands.

What advice would you give young women wanting to succeed in the sector?

Women have a very important role to play in the water sector and in the science, technology, engineering and mathematics (STEM) fields in general.

Our skill sets are ideally placed to give the field the push it needs; we tend to see things from a different angle.

I love that Einstein quote – “We cannot solve our problems with the same thinking we used when we created them” – because it is so true.

We need out-of-the-box thinkers to solve our current water sector problems and that’s where I think women can play a vital role.

To the young women out there wanting to succeed in this sector, tackle life head-on. Wherever you work, be it corporate, government, parastatal or small business, have a vision for yourself – where do you want to go, what do you want to do with your life?

Surround yourself with like-minded people, tackle any challenges that come your way with strength, glean as much knowledge and insight as you can from mentors in the sector and use that to springboard yourself to greater things. You can conquer the world.

Susan Cole

Director and owner of Aqua Resources SA

Susan Cole, owner and director of water treatment products company Aqua Resources SA, says that starting her own business was one of the most daunting and rewarding moments in her career. She challenges other women in the water sector to embrace their own visions for success.

WISE WORDS “We cannot solve our problems with the same thinking we used when we created them.”

Alber t Einstein

“Surround yourself with likeminded people, tackle any challenges that come your way with strength, glean as much knowledge and insight as you can from mentors in the sector and use that to springboard yourself to greater things. You can conquer the world.” j ul y / a ug u s t 2017

15

QUALITY PURIFIES.

The efficient and sustainable treatment of water plays a decisive role in many industries, especially as zero liquid discharge is becoming the license to operate. As one of the world’s leading manufacturers of products for the purification of water and other aqueous effluents, LANXESS has been providing innovative, costeffective water treatment solutions for more than 80 years.

Lewatit® ion exchange (IX) resins are used for the purification of water, or to selectively remove or recover specific ions. LANXESS’ Lewabrane® reverse osmosis (RO) membrane elements are used to recover water from brackish and sea water, or to recycle water from effluent streams. The LewaPlus® design software is a comprehensive, powerful software design tool for RO membrane and IX resin systems. Bayoxide® iron oxide adsorbers bind specific impurities quickly and reliably, and round off our product portfolio of solutions for water treatment.

INDUSTRIAL WATER

Treatment technology now A company with strong roots in South Africa, LANXESS began its journey in this country as far back as 1922. Today, the multinational firm is widely known the world over for its leading water treatment technologies.

N

early one-quarter of global water consumption is attributed to industrial production. The global volume of wastewater is accordingly high.

When it comes to wastewater, the goal, therefore, is to avoid and recycle instead of using conventional disposal. LANXESS is a major, global provider of liquid purification technologies. The company’s high-performance products are used in numerous industries to treat and purify water to the required specifications, to purify processing streams, and to recover valuable ions from solution. LANXESS not only supplies world-leading filtration technology, it also

applies good sustainable business practices to its own production facilities.

For example, the volume of process wastewater produced relative to product output has fallen by 6% group-wide in the last five years.

RO membrane elements is currently projected to grow at an above-average rate of 10% annually over the next three years. In the case of ion exchange resins, future growth is predicted to average 4% per year.

Solutions for clean water There is a great deal of potential for using process water sustainably and minimising wastewater in industry.

The chemical industry bears a particular responsibility for water because it can provide key solutions. With decades of experience in water treatment, innovative products and technologies, LANXESS is meeting these challenges head-on.

Reverse osmosis (RO) and ion exchange in water treatment play vital roles in achieving these goals. The market for

Ion exchange resins: tiny beads with a big impact An efficient technology from LANXESS for treating water is the use of Lewatit ion exchange and specialty adsorber resins.

Among other applications, ion exchange resins are used to remove pollutants such as nickel, nitrate, perchlorate, borate and hydrocarbons from drinking water.

During the ion exchange process, contaminated water flows through a container filled with ion exchange resin.

It filters the contaminants, binding the

Reducing the amount of water used in industrial processes and then treating it so that can be reused is key to using water sustainably

j ul y / a ug u s t 2017

17

INDUSTRIAL WATER

ions of the pollutants and replacing them with other harmless ions. A variety of resins are used, depending on the pollutant. In the treatment of wastewater, the ion exchange resins remove heavy metals such as mercury or cadmium. In addition, precious metals such as copper or platinum can be filtered out and then used for other purposes. Industrial applications include the treatment of water for industrial processes in power plants. These costly facilities need large volumes of cooling and process water, which have to be demineralised to protect the systems against limescale, for example. The microchip and pharmaceutical industries require water in an extremely pure form. Lewatit is used in these industries to produce ultrapure water, which is a vital manufacturing resource.

treatment of process water for power plants and the generation of ultrapure water in the microelectronics sector.

Another area of application for RO membranes is the production of drinking water from both brackish water and seawater. This method is used on a large scale in cities and municipalities and on a small scale in restaurants, hotels and on cruise ships. The membranes lower the salt content of the water and are often combined with ion exchange resins to form a highly efficient and powerful demineralisation system. Lewabranebrand membrane elements are manufactured at a high-tech, fully automated production plant in Bitterfeld, Germany.

The membrane chemistry depends on a strongly crosslinked polyamide layer that displays high resistance to chemical cleansers, higher rejection of complex salt mixtures and a low surface charge, which reduces fouling tendencies.

Since their market introduction in 2012, tens of thousands of Lewabrane filter elements have been installed in more than 70 countries.

The market for RO membrane elements is currently projected to grow at an aboveaverage rate of 10% annually over the next three years

Modern membranes The membrane elements in LANXESS’ Lewabrane line of products are spirally wound, thin-film, composite membranes. They filter out undesirable substances from water such as salts, pesticides, herbicides, viruses and bacteria.

The product line includes elements for all the main RO applications, including desalinating seawater, brackish water and low-salinity water.

Leading fields of application include the production and treatment of drinking water, but also the treatment of process water, other industrial water and wastewater. Among the most important applications for RO membranes are the

Arsenic: invisible threat Arsenic pollution is one of the most dangerous forms of drinking water contamination. It can’t be tasted or smelled, but the toxic substance accumulates in the body, ultimately causing death. Some very high concentrations of arsenic occur in the groundwater in many regions of the US, South America and Asia.

LANXESS is not just a water treatment technology supplier – as a major specialty chemicals supplier, the company has cut its industrial effluent production by 6% across the entire group

18

jul y /aug ust 2017

Elevated arsenic levels are also often found in Europe – for example, in the UK. It is estimated that more than 100 million people worldwide drink water with an arsenic content higher than 50 μg/ℓ. Both the EU and the US have adopted the World Health Organization’s recommended limit of 10 μg/ℓ of water in new legislation.

Arsenic is a naturally occurring mineral. Under certain conditions, highly toxic arsenic compounds can be washed out of the stone, passing into groundwater. Numerous medical studies document the chronic illnesses suffered by people who drink water contaminated with arsenic for extended periods, including skin disorders and carcinomas.

The hybrid adsorber Lewatit FO 36 and the iron oxide adsorber Bayoxide E33 are specially designed to remove arsenic from drinking water and wastewater. The core of the Bayoxide system is a solid bed of iron oxide beads. They have finely structured surfaces that adsorb pollutants when contaminated water flows over them.

The beads are highly stable in water and do not break down. They consist of minute particles that can only be seen under a high-resolution electron microscope. Every gram of these particles has a surface area of around 150 m2, i.e. the floor area of a large apartment. It is on this surface that the arsenic is selectively adsorbed.

Mining effluent Bayoxide E33 from LANXESS not only helps to treat drinking water; other fields of application include wastewater treatment in mining, for example, or the treatment of contaminated groundwater in the vicinity of abandoned industrial plants.

New atlas to improve decision-making The new South African Mine Water Atlas, released by the Water Research Commission (WRC), is set to be a vital decision-making tool, making available the necessary knowledge to reduce the impact of mining on water resources. By Jo Burgess*

M

ining has been an integral part of the South African economy for over 100 years. The industry employs about 500 000 workers and contributes 7% to the country’s GDP. The mining sector is also a large user of water in certain areas, with the water pollution problems associated with mining being well publicised in recent years.

Relatively small volumes of water are used by mining companies compared to other industrial sectors, but water is needed for the extraction and Figure 1 A map from the atlas

concentration of metals and non-metallic minerals. Water is also used to generate the electricity required for crushing ore, on-site processing, smelting, refining and other aspects of treating resources to improve their properties.

The crucial difference between mining and other industries is the severe and long-term nature of its impact on aquatic and terrestrial environments – a widely acknowledged impact that has not been mapped in South Africa, until now. For this reason, the WRC, with its research partners, embarked on a project to create the first South African Mine Water Atlas. The atlas is intended as a comprehensive reference of the

*Jo Burgess is the research manager: Sustainable and Integrated Industrial Water Management, and Mine Water Treatment and Management at the WRC.

Now published, the atlas is the most comprehensive document of its kind worldwide true extent of mine-influenced water in the country, both on the surface and underground. Now published, it is the most comprehensive document of its kind worldwide. The atlas consolidates data on mineralogy, water quality, water flow, the present ecological state and hydrogeological information, thereby assisting water resource managers from all sectors to understand where the vulnerabilities are, which should lead to more coordinated decision-making.

Who uses it?

In essence, the atlas is meant to be an educational resource for water users, including legislators and the public, as well as a tool to facilitate decision-making and the setting of key questions for both investors and developers, and for mining houses to better understand the extent of their probable post-closure risks and costs related to the protection of human, public and environmental health.

The atlas presents maps in a regional context, handling each water management area (WMA) in separate sections and focusing on the key issues presented in each. The information is presented in printed form, as well as in digital (GIS) datasets. The atlas will also be made j ul y / a ug u s t 2017

19

MINE WATER

VAAL WMA Mineral Risk Rating Par ts of the Vaal Water Management Area with Ver y High (shown in red) Mineral Risk Rating encompass the Witwatersrand Basin’s gold and (historical) uranium mines; the Welkom and Vereeniging coalfields as well as the South Rand.

Ermelo and Highveld coalfields to the nor th-east; the largely unexploited uranium deposits of the Karoo Supergroup in the south-east; the sulfide-rich deposits of lead in the Transvaal Supergroup; and lead, copper and zinc in the Nor thern Cape.

In all cases there is a high risk of acid mine drainage and/or leaching of potentially toxic trace elements into the environment.

available in an interactive form through online web portal resources, allowing anyone access to interactive map data.

It is important to note that the atlas does not present where a developer can or cannot mine, but rather what risks or threats there are to South Africa’s water resources in an unmitigated scenario.

This is intended to present the key questions intuitively and graphically, and facilitate understanding of the issues from a broader geographic context.

From a mine developer’s perspective, for example, this could pertain to the expected liabilities in terms of the level of mitigation.

these publications, and it will indeed be available in printed form – obtainable upon request at no charge, as with other WRC publications – and also as a PDF file that can be freely downloaded from the WRC website. The approach used for the South African Mine Water Atlas was based on the understanding that the environmental conditions resulting from mining are controlled largely by the type of mineral deposit, the geology of the host rock, and the particular mining method. This geo-environmental risk was then considered against the vulnerability of the receiving water resource to come up with a “mine water threat” rating.

Atlas scope How to use it The threat to both surface water and The atlas also does not at all replace the groundwater resources is addressed in need for site-specific specialist study the atlas, using different criteria. While and impact assessment in the detersurface waters are assessed in terms of mination of risk, environmental impact present ecological state and water qualassessment, and specific mitigation ity, groundwater resources are scored strategies in respect of mining and according to aquifer type and yield; water management. regional and local secondary structures, For many of us, the term “atlas” brings such as folds, dykes and quartz veins; to mind one of our school geography borehole yield; and groundwater quality. textbooks, crammed with detailed maps And since the depicting every impact on aquifer part of the planet, It will help us prioritise systems depends on or perhaps the how we invest in the type of mining kind of roadmap mitigation and remediation activity, the groundbooklet that has been rendered activity for sites that have water vulnerability rating differentiates largely redundant already been damaged between surface by dashboard mining – in the upper 100 m of the GPS navigation devices or smartphone ground – and deeper underground apps. With its many colourful and mining, where water is mainly confined informative maps, the Mine Water Atlas certainly has much in common with to fractures in the rock. A detailed

20 20

MAY/JUNE 2017

jul y /aug ust 2017

explanation of the methodology used to arrive at the final mine water threat ratings is provided in the opening pages of the atlas, after which each of the country’s WMAs is covered in its own section. These include an introduction with an overview of the WMA and mining that occurs there, as well as profiles of mineralogy, surface water and groundwater, followed by a set of thematic maps showing the various components of the assessment, namely: •m ining and mineral resources •m ineral risk rating •m ine activity risk rating •g roundwater vulnerability – surface mining •g roundwater vulnerability – underground mining • surface water threat • mine water threat: groundwater – open-pit • mine water threat: groundwater – underground • mine water threat: surface water.

The map is set to go a long way towards informed decision-making regarding South African mining. It will help us prioritise how we invest in mitigation and remediation activity for sites that have already been damaged, though it can also provide a guideline for new mining activity.

Those interested in the report can request a copy of the South African Mine Water Atlas (WRC Report No. TT 670/16) and visit www.wrc.org. za/Pages/MineWaterAtlas.aspx

MINE WATER

Choosing the right filtration technology Ultrafiltration membrane racks

Whether acidic, hard or containing high levels of suspended particles, there is a filtration solution out there for different types of mine water. Henk Smit, managing director of Vovani Water Products, discusses a few of the more popular options.

What are some of the biggest challenges in mine water treatment?

HS One of the major challenges is still the quality of the water to be treated, as water quality varies from mine to mine and each presents a unique challenge.

One problem is acid mine drainage (AMD), where highly acidic water has leached and retained poisonous heavy metals from inside mines. Past treatment interventions mainly concentrated on neutralising low pH levels and removing the metals, but this still leaves elevated levels of salts in the water.

Another challenge is educating all role players on the newest treatment technologies available. These role players need to be involved so that the best, most effective and affordable treatment

solutions are implemented at the right time and quickly. This benefits not only the mine itself but also the communities that live nearby.

How do your products and services solve these challenges?

As Vovani Water Products represents many international products used in water treatment, we are in a unique position to work with the mines, consulting engineering firms and original equipment manufacturers to supply our various product offerings in the form of a unique packaged solution, which is suitable for any given mine.

Vovani is a channel partner of international giant GE Water Technologies, allowing us to offer the latest technologies

Henk Smit

Managing director of Vovani Water Products

– from ultrafiltration (UF) to reverse osmosis (RO) membranes. Additionally, with our other suppliers – ROPV, Fedco, PASS and Aqua Solutions – we can assist our clients with the best solution, whatever their water treatment challenge.

Could you discuss a case study where your products were chosen to improve water quality at a mine?

In Namibia, our Zeeweed 700B SevenBore inside-out UF membranes were chosen at the Langer Heinrich Uranium Mine near Swakopmund, to treat the wastewater as prefiltration prior to the nanofiltration (NF) membranes.

These UF membranes remove the high solids loading in the wastewater, so that the feedwater going to the NF j ul y / a ug u s t 2017

21

A strong foundation for infrastructure success

In Namibia, our Zeeweed 700B SevenBore inside-out UF membranes were chosen at the Langer Heinrich Uranium Mine near Swakopmund spiral-wound membranes is of a higher quality. As a result, these membranes will have to deal only with the removal of certain dissolved minerals – as the processes on the mine require. The strength of the SevenBore ZW700B UF membranes made them ideal for this application, as they are 10 times stronger than single-bore fibres and more robust. This is ideal for handling the tough conditions of the feedwater at the mine.

I15457

What other sectors benefit from your offering?

Vovani also serves the industrial, agricultural, hospital and medical environments, municipal and other government sectors. We also deal with non-profit organisations, and have specially tailored offerings for that particular market.

ROCLA is South Africa’s leading manufacturer of pre-cast concrete products. Surpassing 100 years of product excellence, including pipes, culverts, manholes, poles, retaining walls, roadside furniture, sanitation and other related products within infrastructure development and related industries.

Visit us on www.rocla.co.za for our nationwide branches

What technology do you foresee becoming more widely used across the different sectors you serve and why?

UF is becoming a more widely used treatment technology, as prefiltration to RO and as a treatment process on its own. UF is able to treat surface water to the highest-quality potable drinking water for any type of human settlement – from small communities to the largest cities.

Many applications do not require RO-treated water yet do require the removal of high suspended solids, bacteria and viruses, so that the treated water is safe for human and animal consumption. The same high-quality water is required in numerous agricultural applications. UF is the ideal technology for these applications, especially the Zeeweed 700B UF modules from GE Water, available locally from Vovani Water Products.

UF is also becoming a more cost-effective solution as a pretreatment step prior to RO desalination. Pretreatment has both short- and long-term advantages.

Further, at cities next to the coastline, where South Africa is currently experiencing some the worst water shortages, installing seawater desalination plants can provide long-term water security. UF plays an important role in this particular treatment process, ensuring plants function more effectively and economically.

22

j ul y / a ugus t 2017

TRENCHLESS TECHNOLOGY

SASTT readies for No-Dig 2018

The International Society for Trenchless Technology (ISTT) No-Dig Conference and Exhibition will be hosted in Cape Town, South Africa’s beautiful tourist haven.

By Frances Ringwood

his 36th ISTT event taking place during October 2018 at the Cape Town International Conference Centre (CTICC) will incorporate an African experience for the international delegates. No-Dig SA will be hosted by the South African Society for Trenchless Technology (SASTT), the local trenchless industry association.

SASTT first announced its bid to host the event at the 32nd No-Dig Conference and Expo in Madrid during 2014. The following year, at No-Dig Istanbul, immediate past president of SASTT Sam Efrat presented the association’s bid for the 2018 event.

At the 34th No-Dig in Beijing, Efrat – who has been part of South Africa’s delegation to this event for many years – was overwhelmed when it was announced that South Africa would host the 2018 event, beating competitive bids from Helsinki and Bucharest.

Efrat, who was instrumental in putting

Bureau, a division of Wesgro (the Western Cape Investment and Trade Promotion Agency), and it was decided that the Cape Town International Convention Centre (CTICC) would be the ideal venue. The CTICC is ideally suited to accommodate the estimated 1 500 delegates who will be attending both the conference and exhibition. A further factor in favour of the venue is its central location near hotels and places of interest such as the Westin, Cape Grace, Century City and the V&A Waterfront.

A number of suitable venues were suggested for the various evening events that form an integral part of such a conference. Finally, it was decided that the Chairman’s Dinner would be held at Gold Restaurant, the Gala Dinner at Cape Town City Hall, and the Board Meeting at The Cullinan.

“We worked closely with Wesgro, recognising that a high-profile event such as No-Dig would create fantastic business and tourism opportunities for South Africa,” notes Efrat. “SASTT recently held a CIPP Masterclass presented by world-recognised expert

T

EVENT DETAILS Event name:

No-Dig 2018

Host: SASTT

Organiser:

Westrade Group closely with “We worked Wesgro, Venue: recognising CTICC/Century City Conference that a high-profile event Centre such as No-Dig would Date: create fantastic 8 – 9 October 2018 business tourism opportunities.”

together the bid, described what motivated SASTT’s efforts as well as what potential delegates could expect.

Remembering an industry stalwart “As part of our bid, we made it clear to the selection panel that we wanted to pay tribute to SASTT’s founder and honorary director, the late Joop van Wamelen. He was a mentor to many of us in the industry and I believe it’s important that his legacy in the South African trenchless community is acknowledged,” says Efrat.

Van Wamelen passed away in 2015 after a protracted illness. He spent 24 years developing and guiding the South African trenchless industry and his invaluable contribution to the discipline’s development will never be forgotten.

Choice of venue Prior to deciding on a venue for the event, appointed event organiser Westrade Group, along with ISTT and SASTT delegates, set out on a search for a suitable venue.

Members of the task team included Efrat, Sam Ariaratnam from ISTT, and Westrade director Paul Harwood. They met with Adriaan Fourie from the Cape Town & Western Cape Convention

Alaster Goyns (right) and Sam Efrat at this year’s ISTT gala dinner in Washington DC

TRENCHLESS TECHNOLOGY

2 000 delegates attended the last international No-Dig Conference

160 presentations were presented across six streams

Ian Ramsay in the City of Cape Town, with many highly regarded members of the trenchless community contributing.

Delegates came away saying it had been a great success.

“With the awe-inspiring beauty and the cultural features of the Cape Peninsula combined with the input of world-renowned authorities, we foresee next year’s international event as being a truly memorable and enjoyable experience for our overseas guests, as well as promising the opportunity for sharing in the latest technical developments in TT,” concludes Efrat.

Hotels, restaurants, and shopping and entertainment opportunities have been outlined in a comprehensive programme for guests. Planned activities will include sightseeing, wine tasting and visiting the penguins on Boulders Beach. No-Dig 2018 will encourage delegates to enjoy everything that Cape Town has to offer business tourists. To promote the technical aspects of this event, a series of mini seminars will

24

2014 is when South Africa first announced its bid to host No-Dig 2018

8 – 9 October 2018 is the date No-Dig will be coming to South Africa

Figure 1 Trenchless operations cross section

be held in the main centres around the country. Alaster Goyns, with the assistance of other SASTT members, will be presenting at these events.

Goyns, alongside Efrat, was one of the original board members of SASTT elected at the inaugural meeting of the association in 1992. In order to get a feel for how these international events were

organised, Efrat and Goyns attended No-Dig 2017, held in Washington DC earlier this year. This was an awe-inspiring event held by the North American Society of Trenchless Technology, which hosted 190 exhibitors, 160 presentations in six streams, and a combined attendance at the conference and exhibition of over 2 000 delegates.

jul y /aug ust 2017

Trenchless Technology Specialist

Our range of services include: • Pipe Bursting • Horizontal Directional Drilling • Pipe Rehabilitation

• Pipe Ramming • CCTV Inspection • Dewatering

• HDPE Welding • Deep Excavation and Shoring • Underground Service Detection

• Slip Lining

• Industrial Pipe Cleaning

• Close-fit lining: COMPACT PIPE

For more information you can contact us: +27 (0)21 761 3474 F +27 (0)21 797 1151 E info@tt-innovations.co.za www.tt-innovations.co.za

QUALITY IS OUR FOUNDATION

Franki Africa provides dedicated expertise in: • • • • • • • •

Piled Foundations Lateral Support Ground Improvement Near Shore Marine Works Trenchless Technology Design – Build Foundation Repair & Underpinning Liquefaction Mitigation

As part of the connected companies of Keller, Franki Africa offers a comprehensive range of geotechnical and marine engineering services including both design and construction for the General Construction, Civil Engineering and Mining Industries. Call Franki today about your next project.

global strength and local focus

+27 11 531 2700 | franki.co.za

3

2 1

Drakenstein: bulk sewer line

K

eller’s Franki Africa has developed a reputation for being able to deliver cost-effective geotechnical solutions using a wide range of appropriate technologies in a host of different and often challenging ground conditions. “We have worked in

Contract No. CES 14/2015 Client:

Drakenstein Municipality

Engineer: Lyners

Main contractor: Vakala Construction

Specialist geotechnical contractor:

Franki

Contract commencement/ completion: August 2016 to February 2017

Scope of specialist geotechnical work:

215 m 1 780ø O.D. pipejack; 250 m³ grouting

26

jul y /aug ust 2017

Southern Africa for many decades and have a profound understanding of the different soil conditions and the optimal geotechnical solutions for them,” says Byron Field, trenchless technology manager, Franki Africa.

He adds that this knowledge often enables the company to be proactive in solving problems that, on the face of it, sometimes seem insoluble.

“The Drakenstein Municipality’s bulk sewer pipeline is an excellent example of this,” says Field.

The challenge The path of the sewer pipeline – which is in the Paarl, Western Cape – included a ±105 m stretch across Arboretum Road and the N1 highway, followed by a ± 10 m section, which runs parallel to the Boschenmeer Golf Estate boundary wall at a depth of between 6 m and 8 m.

According to Field, the main challenge was the relatively unstable ground conditions, which comprised sands of up to 4 m deep, with loose cobbles and boulders from depths of 4 m to 8 m, and a very high water

table. He adds that the South African National Roads Agency also had strict wayleave conditions, prohibiting Drakenstein Municipality from conducting works beneath the national highway unless it was able to prove that every conceivable precaution was taken to protect the highway and to ensure uninterrupted use.

It was obvious that a trenchless methodology, like pipejacking, was required in order for the new sewer to run under the roads without interrupting traffic. Additionally, the depth of the pipeline and its proximity to the Boschenmeer Golf Estate boundary wall made open excavation unpractical in this area.

The cobble layer The ground conditions were analysed and a new challenge was encountered. Field explains: “First, the level of the sewer passed directly through the cobble layer between a depth of 4 m to 8 m and, when pipejacking through this type of ground, it is virtually impossible to prevent the collapse of the cobbles during

TRENCHLESS TECHNOLOGY

4 5 Constructing a pipeline extension under a heavily trafficked route calls for a creative geotechnical response to combat a cobble layer, with the core response entailing jet grouting.

6 1. Excavating at the jacking face 2. Jet grouting rig adjacent to overhead powerline 3. Consolidated material 4. Jet grout rig while casting grout column 5. 8 m deep jacking pit 6. Jet grouting rig 7. Pipejack gantry

7

FAST FACTS excavation. “Second, the high water table tends to draw fines from the surrounding ground towards the jacking shield. Both of these things could have led to over-excavation, resulting in ground level settlement,” he says.

Jet grouting solution Franki then approached the Drakenstein Municipality with a proposal to treat the ground beneath Arboretum Road and the N1, as well as alongside the Boschenmeer Golf Estate boundary wall.

The proposal entailed jet grouting, which involves the mixing and partial replacement of the in situ soil with cement slurry, to consolidate the in situ ground condition along the sewer centreline and between the depths of 4 m to 9 m, and then installing a pipejack through the treated ground.

“The treatment of the ground would prevent the collapse of the sand and cobbles during pipejack excavation and would reduce the ingress of water to manageable levels,” Field says. He adds that jet grouting was Franki’s preferred method of treatment as

high-pressure jetting can be used to consolidate in situ ground at exact levels and can provide up to 2.5 m diameter columns with only an 80 mm drill stem. The municipality’s design team found the proposed solution acceptable, included it in a tender document for this phase of the works and, in August 2016, Franki was appointed by the main contractor, Vakala Construction, to carry out the specialist geotechnical works as per their envisioned specification. Field says that the result could not have been better. “The jet grouting work went according to plan and was carried out with zero impact on traffic.

In addition, once the jet grouting was completed and the site was cleared, there was no remaining evidence at ground level that the ground beneath had been treated,” he says.

As for the pipejacking, Field says the entire operation went smoothly with the ground treatment “working beyond even our highest expectations”.

The subcontract work was completed by Franki on time and within budget in February 2017.

Trenchless technology is a family of methods, materials and equipment capable of being used for the installation, replacement or rehabilitation of existing underground infrastructure with minimal disruption to sur face traffic, business and other activities. It is, therefore, often the most costeffective solution.

Pipejacking is one of the oldest and most successful trenchless techniques available in the geotechnical contractor’s toolbox.

Using this technique it is possible to accurately install concrete culver ts and pipes up to 3 000 mm in size in almost any ground condition.

Pipejacking entails manual excavation from within the protective confines of a jacking shield.

The jacking shield is jacked for ward using high-per formance hydraulic jacks and once the shield has progressed far enough for ward, a concrete pipe is then lowered into position behind the shield.

Excavation and jacking continues until sufficient pipe sections have been installed.

j ul y / a ug u s t 2017

27

HDD & ROCK DRILLING Installing water, electrical, sleeves and sewer pipes underground using Horizontal Directional Drilling.

Horizontal Directional Drilling Contractors .

Rock Drilling Specialists

Drilling up to 800mm diameter Drilling up to 0.5km in distance

Contact us for more information www.rescuerod.co.za

info@rescuerod.co.za

Tel: 010 040 3209

TRENCHLESS TECHNOLOGY

HARD ROCK RULES The advantages of horizontal directional drilling, focusing on rock drilling – a contractor’s perspective. By Stuart Hawkins*

R

escue Rod has come a long way since our first horizontal directional drilling (HDD) project, which was completed in 2003, and today we are one of the leading contractors in HDD in South Africa. Rescue Rod has a sizeable fleet of equipment, which allows the company to focus on varying diameter crossings in the oil, gas, sewer, water, fibre-optic and power markets in all types of terrain.

The HDD form of trenchless technology is widely recognised around the world as the most efficient, rapid and cost-effective method of instituting this technology. In place of the traditional trenching and excavating methods previously requested, HDD permits installation of such services under construction sites, rivers, roads and railway lines without disrupting the surface functions and operations in any way.

• SAB, Chamdor – truck entrance and weighbridge; rock drilling to accommodate two 160 mm cable sleeves over some 24 m.

• Mediclinic, Pretoria – line drilled through rock, from basement to council sewer to accommodate 180 mm HDPE sewer over approximately 30 m.

• Nampak, Alrode – rock drilling to accommodate a 250 mm sleeve for gas lines, both under the main entrance and a separate crossing under a railway line.

HDD is fast becoming the preferred method of pipe or sleeve installation due to the reduced impact on the environment, community and surrounding infrastructure. In the past, HDD was limited to soft “pickable” material but some newly acquired technology has enabled Rescue Rod to drill through just about anything.

Practical experience Rescue Rod believes in the “boots dirty” approach and practical experience has accelerated our technical expertise coupled with our acquired skills into a highly sought-after, reputable service provider for the HDD industry. At Rescue Rod, we are continually advancing our innovative technology to tackle any and all site conditions directly, while emphasising and focusing on eco-friendly solutions with a low environmental impact and less disruptions to the infrastructure and surrounding communities. *Stuart Hawkins is Rescue Rod’s drilling supervisor. He and his highly trained teams, coupled with the company’s exceptional safety standards, have undertaken a number of successful projects propelling the advantages of rock drilling to the forefront of contractors’ viable options.

Project experience Rescue Rod offers HDD through any material and under any surface structure with the relevant experience to meet virtually all HDD project requirements.

The technology applied incorporates the capability to drill through solid rock without the need for blasting. Rescue Rod has successfully completed a multitude of projects of various diameters and with varied types of site conditions. Our most recent rock drilling contracts include: • Kyalami Agricultural Holdings – various crossings to accommodate 200 mm to 560 mm diameter sewer lines, including rock drilling. j ul y / a ug u s t 2017

29

We Specialise In HORIZONTAL DIRECTIONAL DRILLING (WATER, SEWER, OIL, GAS, PETROLEUM) PIPE JACKING

PIPE CRACKING

AUGER BORING

TRENCHLESS TECHNOLOGY

Trevor Naidoo

083 564 4879

Siven Naidoo

081 504 1956

Piet Van Biljoen

083 659 4456

34 Estuary Place, Verulam, 4340

info@hddrilling.co.za

www.hddrilling.co.za

TRENCHLESS TECHNOLOGY

Experience makes the difference HD Drilling Contractors opened its doors in KwaZulu-Natal back before the benefits of trenchless pipeline rehabilitation methods were widely known.

Owner Trevor Naidoo describes how dominating a newly developing niche made his company a leading service provider.

T

he trenchless technology (TT) market requires specialised services and we decided to capitalise on that need by purchasing the necessary equipment.

At that stage, there were only two players in the local KwaZulu-Natal market, allowing us to gain market share fairly quickly,” explains Naidoo.

Today, HD Drilling Contractors is the largest horizontal directional drilling (HDD) company in the province. HDD is ideal for rehabilitating old, damaged pipelines, as well as increasing the diameter of existing pipelines for improved service capacity.

the labour involved in going into the sleeve and clearing debris,” says Naidoo.

Large-diameter HDD drilling

Experience adds up “Becoming a leading service provider isn’t just about your equipment, because HDD rigs are available worldwide. Our knowledge and experience set us apart – especially when it comes to massive pipelines,” says Naidoo.

The relevant geotechnical training, knowledge of ground conditions, being able to work out pull-back stresses and mud volumes, and other critical theoretical knowledge are all essential to the success of TT projects.

on a small scale but our speciality lies in the water and sewage sector, and other large-diameter pipelines. These include oil and gas pipelines,” says Naidoo.

While HD Drilling is well established in KwaZulu-Natal, the company has ambitions to take on more large-pipeline projects in other African countries like Botswana, Zambia and Kenya. “Because of the bigger rigs we own, we feel the next move is to get into the bigger pipe laying projects outside the country,” Naidoo adds.

Why choose HDD? The demand for TT and HDD in particular has increased over time, as the benefits have become increasingly clear to utilities. In the past, municipalities didn’t mind cutting roads and digging trenches; today, however, utilities are aware that they can complete a pipeline project without disturbing above-ground surfaces.

“The traditional TT method used in the past is called pipe jacking, where a 200 mm pipe is jacked to a 900 mm sleeve. A diameter of 900 mm is the minimum for a conventional pipe jacking rig. With HDD, however, we can increase a 200 mm pipe to 400 mm, saving money on materials as well as

Large-diameter advantage While there has been a boost to the TT market coming from municipalities seeking to bring high-speed internet to South African homes, Naidoo notes that this is not the company’s core business. “We serve the telecommunications market

Challenge overcome One of the largest projects undertaken

by HD Drilling was a 240 m x 720 mm length of pipe across a portion of the N3 national highway, bringing water from Howick to Merrivale. “Planning was critical because the road is Sanral property and we could not risk road fracturing or ground collapse,” says Naidoo.

“In spite of having to navigate significant red tape in managing, supervising and ensuring personnel and public safety for the duration of the project, we finished the project in just 42 working days, although the project was originally estimated to take three months. I consider this an excellent demonstration of the benefits of TT as well as HD Drilling’s expertise,” he concludes.

“Becoming a leading service provider isn’t just about your equipment, because HDD rigs are available worldwide. Our knowledge and experience set us apart – especially when it comes to massive pipelines.”

j ul y / a ug u s t 2017

31

”

PIpes, pumps & valves

WHEN ASBESTOS

leaves you breathless

” 32

Old asbestos cement (AC) pipes are being dug up and replaced all over the country, usually with plastic pipes. The asbestos itself has a negligible effect on drinking water; however, ingesting asbestos isn’t the main problem – inhalation causes more immediate health issues. By Frances Ringwood

T

he problem with asbestoscontaining materials such as pipes is that when they are cut, asbestos fibres are released into the breathing zone of the workers and or public. This creates a health hazard for people working on-site.

When those particles enter a person’s lungs, especially if that person is a smoker, it can cause serious respiratory problems,” explains Alaster Goyns, owner of Pipe Installation and Professional Engineering Services.

Asbestosis can result from breathing in these fibres.This condition affects the lungs and causes shortness of breath, coughing and sometimes permanent lung damage. Inhalation of asbestos fibres can also increase the risk of developing lung cancer or another type of cancer called mesothelioma, which jul y /aug ust 2017

affects the thin tissue covering the lungs.

A small number of studies have linked asbestos ingestion to colon cancer, which is one reason why they are no longer considered safe for the conveyance of drinking water.

Original application Pipes were originally fortified with asbestos fibres because of what was commonly seen as asbestos’ superior structural properties. In fact, the name asbestos comes from the Greek word for unquenchable or indestructible. Asbestos itself is a family of silicates, all exhibiting qualities of high durability and tensile strength. So ubiquitous was the use of asbestos in the 20th century that it was found in everything, from vinyl flooring and exhaust pipe insulation to mailbags and mattresses. Asbestos fibres even

Asbestos pipe piled on the ground

found their way into talcum powder used in condoms.

AC pipes were particularly popular for water reticulation systems. In the US alone, sufficient quantities of AC pipe were manufactured to circle the Earth eight times, while also running to the moon and back. Today, there are no manufacturing facilities in South Africa making AC pipes.

In addition to the health concerns, the material has become extremely unpopular for several reasons. Although the fibres did provide tensile strength, the pipes were still brittle and susceptible to handling damage and when used as sewers, they were, under certain conditions, susceptible to corrosion.

PIpes, pumps & valves

The current use of thermoplastic pipes effectively handles these problems.

Plastic fantastic Fifty or so years ago, when AC pipes were still in vogue, they were used extensively for drinking water reticulation in South Africa. Goyns puts AC’s flagging popularity down to a number of things, including the flexibility of plastic. “The majority of AC pipes were used for smaller-diameter pipelines. This meant that the wall thickness was such that they were very rigid, making them more likely to crack,” he explains.When a pipe cracks and begins leaking, the soil around it can be washed into the pipeline.

The pipeline loses bedding support and settles. This results in further cracking, leaking and a progressive deterioration in the pipeline condition. Cavities start forming around the cracks and these gradually increase in size and may eventually become so large that they become sinkholes. There’s many a municipal engineer who will confirm that once an AC pipeline starts to crack, it initiates a

continuous process of repairs. “However, thermoplastics like polyethylene (PE) are able to accommodate much more subsurface movement due to their flexibility.

Repairs are also easier because sections can be welded together so as to make the pipe continuous from access point to access point,” says Goyns. Concrete is strain intolerant, meaning that it will crack when overloaded. PE tends to deform rather than crack.

“With PE pipes, you don’t have to worry about cracking; the issue when they are overloaded is their ovality, which creates a serviceability problem. When a PE pipe deforms, the bottom flattens and compromises the low flow advantage offered by a circular pipe bottom,” he explains. PE is most often used for high-pressure drinking water pipes and trenchless technology rehabilitation.

The other thermoplastic commonly used for pipe installations is polyvinyl chloride (PVC), which tends to be used more for wastewater conveyance.

“Different materials have various properties that makes them better

1. Chrysotile

2. Amosite

3. Rhodusite

4. Asbestos mineral stones

Suppliers of pumps and valves to the mining and industrial sectors for over 60 years.

Stockists of Tianjin small submersible, vertical multi-stage and close coupled water pumps.

Suppliers of the following: M+P Split Casing Pump

Multi-stage Pump

E.I.M.

Viking Gear Pump

Tel: 011 824 4810 Fax: 011 824 2770 Web: www.matherandplatt.com 26 Nagington Road, Wadeville, 1422, Gauteng mather&platt 118x190.indd 1

2015/07/17 11:09 AM

PIpes, pumps & valves

Today, there are no manufacturing facilities in South Africa making AC pipes. In addition to the health concerns, the material has become extremely unpopular for several reasons suited for particular applications. PVC’s advantage is that it has a spigot-andsocket-type joint and that it comes in finite lengths that can be adjusted if necessary. This means that a damaged section of a pipeline can be removed and replaced by an appropriate length of pipe,” explains Goyns.

Hazardous waste Asbestos-containing materials are considered hazardous waste and have to be disposed of accordingly.

However, proper transportation and disposal can be expensive, which is why some municipalities opt to simply leave old AC pipes in the ground.

“Leaving old AC pipes in the ground without rehabilitating them can cause problems,” warns Goyns. “Old pipes leave a cavity underground and if they are cracked or have leaking joints, which is usually the situation, they form a water path. A water path leads to the surrounding material infiltrating into the pipe and this may eventually cause a sinkhole as described above.

The improper rehabilitation of AC pipe is particularly dangerous in dolomitic areas as these are highly susceptible

to sinkhole formation,” Goyns continues. He recommends filling cavities from old AC pipes with soilcrete mix as a precaution.

Legal compliance Koos Roets, director of Consulting Occupational Hygienist, states that while large private sector players in general conform to the relevant Asbestos Regulations when it comes to the handling, safe removal and disposal of AC pipes and other asbestos-containing materials, smaller municipalities and even metros tend to fall short perhaps owing to a lack of knowledge or understanding of the relevant regulations.

“Larger construction companies tend to handle and dispose of old asbestos pipes and other materials according to the Asbestos Regulations, and are generally registered with the Department of Labour as a registered asbestos contractor.

They use an approved inspection authority to do air monitoring while handling asbestos as required by law and because of formal contractual requirements.

However, many of the municipalities (including metros) definitely do not give this process the proper attention and one can often find asbestos water pipes laying around residential areas where maintenance has been done on water pipes. This waste will almost certainly end up on a municipal waste site not approved to receive hazardous

waste,” says Roets. “The occupational exposure limit for airborne asbestos fibres is 0.2 f/mℓ. If someone inhales excessive concentrations of asbestos fibres over a period of time, they are at a higher risk of contracting asbestosis or mesothelioma.

The amount of asbestos fibre released from an asbestos-containing pipe depends on various factors, such as: the percentage of asbestos used in the manufacturing process – which can be up to 54%; the procedure followed when removing these pipes; and the maintenance of water pipes that requires the use of fast-moving electrical equipment, which also drastically increases the amount of fibres released.

If asbestos pipes were used in an acidic environment, the cement will be corroded and loose surface fibres could also be present and could play a role in how much fibre is shed. Also worth mentioning is that one of the characteristics of asbestos is that it is chemically inert, so it has negligible environmental impacts – only health impacts,” he says.

Roets adds that a new asbestos regulation is on the cards and will hopefully be promulgated in 2017 following the long-awaited revised Occupational Health and Safety Act. He believes that the new regulation will provide a better understanding and will close some ambiguities in the old one, which focused on manufacturing with asbestos-containing materials. The new regulation will focus on controlling the phasing-out and removal and maintenance of in-situ asbestos. j ul y / a ug u s t 2017

35

DISCOVER INTELLIGENT CONNECTIVITY Grundfos supplies a broad range of sustainable intelligent pumping solutions that reduce system complexity, and ensure better performance, comfort, control and energy efficiency.

No matter what the application or challenge is.

www.grundfos.co.za info_za@grundfos.com

Panel Discussion

Grundfos Africa Why is it important to specify quality pumps, accessories and maintenance?

NR Electrical pumps consume about 10% of the world’s energy. If the world switches over to efficient pump systems, this can be reduced by 4%, not only saving energy, but also making it possible to provide water to more people who need it. This reduces system maintenance and the payback period while also lowering cost of ownership significantly.

Using energy-efficient products can reduce energy consumption by up to 25%, in some cases even more.

System intelligence also plays an important part of pump operation and system maintenance, preventing unnecessary system failures on-site.

To this end, Grundfos Remote Management allows our customers to have more control over their pump system, saving time, energy, water and other resources.

Can you describe the entirety of your offering in a paragraph or two, explaining the benefits of your larger range of products and services?

Grundfos is a global leader in advanced pump solutions and a trendsetter in water technology. We contribute to global sustainability by pioneering technologies that improve quality of life for people and care for the planet.

Advanced pump solutions mean that we offer turnkey solutions to match the needs of our customers – no matter the complexity, application or scale of the solution required.

Our offering includes equipment for water treatment, industry, agriculture, mining, water utilities, building services and solar energy.

In addition to pumps, Grundfos produces and sells standard and submersible motors, as well as state-of-the-art electronics for monitoring and controlling pumps.

Additional products are produced in the BioBooster and Lifelink divisions.

We continuously aim to strengthen our leading position within energyefficient and environmentally friendly solutions. Strong marketing of our most significant energy-

saving solutions – such as ALPHA2 circulators for heating and SQFlex units, powered by wind and solar power for water supply – has generated positive results.

What ordering, consultation, delivery and feedback process do you have in place to ensure client expectations are met and exceeded?

Our clients base can now place their orders online via a Grundfos program called Extranet. This program allows our clients to view live inventory availability and pricing, and place orders. Order tracking is also possible using this system, making it a highly efficient and time-saving way of doing business. Customers can also view financial data and other business parameters online.

What accreditations and quality assurances do your pumps carry and why are these important?

Our ambition is crystal clear: to manufacture world-class, energyefficient pumps.

In 1989, Grundfos A/S was the first pump manufacturer in the world to be certified per the ISO 9001 Quality Standard. In the following years, the other production companies in the group were also certified to the ISO standard. The importance we place on quality and testing reduces the risk of faulty equipment on-site and downtime to the customer.

How are your manufacturing facilities geared to meet market demands?

To maintain a leading position, Grundfos attaches great importance to research and development.

The Grundfos Group is represented by more than 80 companies in more than 55 countries. In addition, products are sold in many countries by local distributors. Assembly plants are also created in countries where this can improve the delivery efficiency of products to the respective markets.

We currently assemble some of our key products in South Africa to maintain and service the subSaharan African region.

Niren Rohanlal Lead business development manager: Sub-Saharan Africa

“Advanced pump solutions mean that we offer turnkey solutions to match the needs of our customers – no matter the complexity, application or scale of the solution required.”

In addition to pumps, Grundfos supplies standard and submersible motors as well as monitoring and control solutions

za.grundfos.com JULY / AUGUST 2017

37

Panel Discussion

macsteel fluid control Given South Africa’s ongoing water conservation efforts, why is it important to specify quality products and equipment?

RB Increasing water scarcity makes breakdowns and associated leaks unacceptable. Added to this, the growing shortage of qualified, skilled artisans means that product quality and a proven track record become even more important.

Macsteel Fluid Control is ISO 9001:2008 certified, and our products range from basic commodity gate, globe and check valves through to highly specialised control valves, filtration systems and tank equipment.

What are important markers of quality to look out for?

Besides the usual quality standards (such as ISO and SANS), clients need to look at the valves they intend to purchase in conjunction with the supplier’s ability to provide aftersales backup, stock holding and technical support. The products offered by Macsteel Fluid Control meet and exceed not only local quality standards but international standards as well.

How do you optimise the supply chain to enhance cost savings?

Macsteel Fluid Control uses a central assembly and test plant for all Bermad control valves. This consolidates the stock-holding requirements of our regional branches. It further allows for accurate and traceable record archiving.

How are your manufacturing facilities geared to meet market demands?

Macsteel Fluid Control employs factory-trained technicians with expertise, skills and detailed knowledge of product design and specifications at all four of our branches. These are located in Bethal, Cape Town, Durban and Richards Bay. What are the benefits of a your larger range of products and services?

We are proud of our diverse product range and believe it to be the most diverse in the industry. As a company, we pride ourselves on our ability to

supply a full solution tailored to our customers’ needs, instead of only the hardware itself.

How do you manage costs in order to transfer savings to the client?

We have a Central Procurement Department that ensures we procure premium-quality products at the best possible prices.

What is your stock-holding capacity and how does this impact your turnaround times?

Macsteel Fluid Control stock is determined through our threedecade-long sales history, as well as our understanding of the market.

Rowan Blomquist CEO

We aim to satisfy most control valve requirements within a two- to threeweek time frame.

For large projects or non-standard requirements, our strong relationship with our principals ensures a quick ex-works lead time.

“As a company, we pride ourselves on our ability to supply a full solution tailored to our customers’ needs, instead of only the hardware itself.”

FAST FACTS Macsteel Fluid Control’s brand offering includes: Amiad: Water filtration systems Amri: Butter fly valves and actuators Armstrong: Steam and condensate products Bermad: Control valves Cyl: Knife gate valves Elfab: Bursting discs Galcon: Controllers Igema: Level gauges and boiler controls KSB: Gate valves, globe valves, check valves and diaphragm valves Natco: Gate, ball, check, butter fly valves and actuators Schubert & Salzer Control Systems: Control valves SRI: API ball valves Smith: Interlocks, flexi drives and easi drives Strahman MG: Specialised valves Elmac: Flame arrestors Motherwell: Tank valves, pressure vacuum valves Mueller: Strainers Terofox: Cast/forged API valves, gate valves, globe valves & check valves Franklin: Double block and bleed expanding plug valves Ateco: Tank roofs

JULY / AUGUST 2017

39

PEXMART Pexmart cc is a high performance civil construction team with an extensive knowledge of local terrains and conditions and a proven track record of delivery on time and within budget.

Key staff has national and international experience working in the mining, commercial and industrial sector.

Manufacturing, fabrication & installation of plastic pipes & fittings HDPE, HDPP, LDPE, PVDF, PVC

Manufacturers of sabs and non sabs pipe • Water Reticulation • Sewer and Storm water • Fabrication and installation of bends, tee pieces, laterals & reducers • Butt welding, Electro fusion, Branch, Socket & Extrusion welding • Installation of Pipe lines and fittings (Above, Underground & Mining) • Suppliers of Stub ends, Steel flanges and related Fittings • Manufacturer of HDPE Manholes • Pipe Relining and Pipe Cracking • Re-sleeving of steel pipes with HDPE • Manufacturing of steel pipelines and fittings

Vision

Mission

Strategy

PEXMART is dedicated in delivering the best quality workmanship with excellence towards a reputation that will far exceed our vision.

PEXMART aim to promote strong relationships with the communities in the surrounding areas in which we operate and to assist our local community with provision of water and sanitation.

PEXMART experience in the industry has taught us that customer service is of cardinal importance and a wellsupervised, well-completed job is the best way of advertising the company.

Contact details below Please feel free to contact us via email: info@pexmart.com or telephonically 012 376 2347 / 012 376 0053, should you have any questions/queries or need any additional prices on quote requests.

www.pexmart.co.za

Panel Discussion

Pexmart What pipes do you manufacture to client specifications. We line forthe water and sanitation steel pipe at our factory or on-site. sector? What manufacturing We have various lining methods, method do you use and why is this namely deforming, swage lining method superior? and interference fit lining. Pexmart RP We’ve manufactured highalso specialises in the fabrication density polyethylene plastic (HDPE) of HDPE manholes, mainly used in pipe and low-density polyethylene dolomitic areas but they can be used plastic (LDPE) pipe since 2007. for any application in any condition.

Our HDPE pipe is a highWe fabricate the manholes pressure pipe with from our own Spiral Lite various pressure pipe in 4 kN and 8 kN “With Pexmart lined ratings from 6 bar specifications. pipe systems, we can to 25 bar. We line an existing steel How do you offer manufacture pipeline with HDPE a holistic range of sizes from liners, and old lines 15 mm up to pipe installation that are leaking or 800 mm. LDPE products discontinued can be is manufactured and services? from 20 mm up Pexmart has a reused, saving endto 100 mm Class 3 combined 100+ years users’ money.”

(3 bar pressure). of experience. What We extrude the pipe makes Pexmart unique from virgin raw material and provides a huge advantage according to SANS 4427-2 and to our clients are our complete we are South African Plastic Pipe turnkey solutions, including the Manufacturers Association (SAPPMA) design, measurement and drawing of accredited. Our pipe is used for the pipelines or plants. This includes the following applications: sewers, water manufacturing of pipe and fittings reticulation, mining and agriculture. for pipelines and plants.

HDPE outperforms all other types We deliver all our material ourselves of pipe for water and sanitation with our fleets of trucks. Pexmart purposes because of its flexibility. installs pipelines or plants from It is durable, and does not crack, start to finish, including earthworks, become brittle or corrode. Pexmart pipe laying, site welding and also manufactures structured installation of pipe, rehabilitation, walled pipe and spiral HDPE pipe commissioning and testing of – commonly used in stormwater installed pipelines and plant pipe. application and sewerage.

What fabrication and installations do you offer and how do these products and services benefit your clients?

We have an in-house fabrication department where we fabricate fittings (seamless bends, tees, laterals, segmented bends, sweep tees), we also fabricate special fittings according to specified drawings. All fittings are fabricated from SANS 4427-2 approved pipe.

We have 15 Installation teams that specialise in HDPE pipe welding and installation.

Pexmart lined pipe systems specialise in lining steel pipe and steel fittings with HDPE liners, which we manufacture ourselves according

Renier Pieterse Sales and marketing manager

We provide engineering and as-built drawings on complete pipeline or plant installation.

With Pexmart lined pipe systems, we can line an existing steel pipeline with HDPE liners, and old lines that are leaking or discontinued can be reused, saving end-users’ money.

With pipe cracking, we can replace old AC (asbestos cement) pipe with HDPE pipe without any trenching – without disturbing the environment or any built-up structures.

What is your footprint in Southern Africa?

Pexmart supplies pipe to all areas of South Africa thanks to the flexibility of having our own fleet.

We also supply to the following neighbouring countries: Namibia, Mozambique, Zimbabwe, Zambia, the DRC and Botswana.

We also have supply contracts in Botswana. Pexmart aims to expand its manufacturing footprint into more African countries in the near future.

Pexmart also offers all HDPE welding methods

JULY / AUGUST 2017

41

SER VICE DELIVERY

Many rural South African households are still denied adequate access to water.

By Mpho Muloiwa*, Dr Caliphs Zvinowanda** & Dr MO Dinka***

D

espite having a right to 24-hour water supply, rural residents receive drinking tap water, on average, once every three days. These communities are often plagued by poor and outdated infrastructure and municipalities, which rely on the revenue generated from service bills, struggle to adequately deliver services.

One such example is Thohoyandou, located in Vhembe District Municipality in Limpopo, which relies on a gravity system to supply residents. A study was conducted in Thohoyandou to assess the capabilities of the area’s water infrastructure. A survey was used to collect data on the frequency of drinking water supply

Integrated fixed film and activated sludge

42

jul y /aug ust 2017

Rural water supply in SA from residents in four areas – Unit D, Unit C, Golgotha, and Block F. A total of 100 households were interviewed as well as the municipality’s technical director: Infrastructure Services to collect information about the area’s current water infrastructure.

Results and discussions The survey found that very few residents receive water consistently to their homes. The study broke down the percentage of residents who receive water at various intervals, as shown in Table 1.

Thohoyandou’s water infrastructure Thohoyandou receives water from two dams – Vondo and Nandoni. Water extracted from these sources is transported to a water treatment plant for purification before being transported to storage reservoirs and then transferred to residents via a gravity feed. After utilisation, the water is collected and prepared for recycling at a wastewater treatment plant in Thohoyandou. Vondo Dam is 901 m above sea level, while the four areas in

These communities are often plagued by poor and outdated infrastructure

SER VICE DELIVERY

TABLE 1 Results and discussions

Consistent, 24-hour water supply: Block F – 33% Unit C – 37% Golgotha – 8% Unit D – 0%

Water daily at limited hours: Block F – 59% Unit C – 59% Golgotha – 48% Unit D – 0%

Thohoyandou sit at significantly lower altitudes: Unit C – 681 m, Unit D – 654 m, Golgotha – 607 m, and Block F – 572 m. Theoretically, the supply of water by gravity is possible at such heights above sea level. The pressure head between Vondo and the various areas are as follows: Unit C – 220 m, Unit D – 247 m, Golgotha – 294 m, and Block F – 329 m.

Conclusion The gravity method used to supply drinking water to residents in Thohoyandou is theoretically feasible, and although the water infrastructure in Thohoyandou has far exceeded its design life, water sources, water treatment plants, and storage reservoirs in Thohoyandou have enough capacity to provide residents with a constant supply of drinking water.

The only inadequate infrastructure is that of wastewater. However, residents in Thohoyandou are evidently experiencing water challenges.

Recommendations The study recommends that Thohoyandou’s water infrastructure be improved to better accommodate the population growth, which more than doubled from 32 730 in 2001 to 69 453 in

Water twice a week: Block F – 0% Unit C – 4% Golgotha – 40% Unit D – 48%

Water every two days: Block F – 8% Unit C – 0% Golgotha – 4% Unit D – 11%

2011. The municipality should implement a looped system as opposed to a gravity system, in which blockages upstream affect the downstream user.

It is further recommended that the municipality install a packaged wastewater treatment plant. The study recommends one of the following: STM-Aerotors, dissolved air flotation (DAF) systems, or BioTreater™ biological treatment systems.

STM-Aerotor Suitable for small communities, an STMAerotor offers the following advantages: biological nutrient removal, no odour, no noise, low energy requirement, small footprint, minimal operator attention, and accommodates fluctuating flow rates.

DAF system Suitable for small communities, a DAF system offers the following advantages: stormwater, water clarification, activated sludge thickening, algae separation, oil and grease removal.

BioTreater™ biological treatment system Suitable for small communities, the advantages are as follows: removal of large amounts of blood, fat and hair, as well as low capital and maintenance costs. These

Water less than twice a week: Unit D – 41%

Figure 1 Dissolved air flotation system

new packaged wastewater treatment plant technologies are cheaper, have low energy consumption, and are more effective for municipalities. *Mpho Muloiwa is a lecturer at Tshwane University of Technology and senior technology advisor at Trans Africa Resources. **Dr Caliphs Zvinowanda is a senior lecturer at the University of Johannesburg and managing director & principal technology advisor at Trans Africa Resources. ***Dr MO Dinka is a senior lecturer at the University of Johannesburg.

MINING | CONSTRUCTION | INDUSTRIAL | FIRE TANKS | AGRICULTURAL

BULK WATER STORAGE SOLUTIONS VERSATILE – ANY CAPACITY – ANYWHERE sales@rainbowres.com | www.rainbowtanks.co.za 015 297 7641 | 083 226 8572

accredited

Proud BBBEE Level 4 Contributor

ODOUR CONTROL

A stitch in time The fast turnaround times offered by modular packaged treatment plants have allowed government to respond to drought-stricken areas in record time.

A

s part of the widespread drought affecting South Africa, especially in the Free State, Western Cape and KwaZulu-Natal, provincial government has implemented relief mechanisms throughout South Africa.

In response, AquaPlan was tasked with supplying a 2 Mℓ/day water treatment plant to the southern part of KwaZuluNatal. “Our engineers considered the various socio-economic and geographical factors relating to a plant of this size, as well as the logistical challenges of implementing a full solution in record time, and decided to go with a modular, portable, packaged solution,” explains Taigrine Jones, contracts administrator, AquaPlan. Since this project formed part of government’s Drought Eradication Programme, the schedule was particularly tight, with no room for delays.

Packaged excellence “When considering the enormous demand for clean, potable water in these areas, it comes as no surprise that there is an equally large demand for a quality product in the shortest possible time – at a reasonable cost. This is exactly our mission at AquaPlan: to provide packaged excellence, at an affordable cost,” says Jones. “We have found that our lead time with regard to this 2 Mℓ/day package

The 2 Mℓ/day plant for KwaZulu-Natal was manufactured entirely at AquaPlan’s Kempton Park facility

“Among our range of products, we have optimised redundancy and contingency to be able to improve the uptime of our plants.” plant was highly competitive. We streamlined our supply chain, our manufacturing production line and assembly workspace to achieve shorter turnaround times much more effectively. This complete, tested and ready-to-run water treatment plant was custom built – from concept to testing – in just seven weeks,” he adds.

AquaPlan carries critical components in stock, to reduce pressure on the supply chain, and it has a vast range of completely designed and engineered solutions that can go into manufacturing within a day from order.

Plant specifications The KwaZulu-Natal plant comprises coagulation, flocculation, clarification, pressurised sand filtration and disinfection all as one process – completely skid-mounted for optimum portability. The entire plant was manufactured at AquaPlan’s facility in Kempton Park, Johannesburg.

“We believe that successful project execution on our part is due to the various divisions within AquaPlan working together. We have invested heavily in our manufacturing facility, our drafting office, and our engineering department,

The modular packaged treatment plant was built, tested and ready to run in just seven weeks

enabling us to design, manufacture and test our plants at our manufacturing facility before they reach site. This allows us to install and commission in a shorter time frame, directly benefiting the client and all other stakeholders,” says Jones.

Aftersales support “Among our range of products, we have optimised redundancy and contingency to be able to improve the uptime of our plants. Our installed products are supported by a team of specialists in the field that look after the operation and maintenance of the products in joint venture with our clients,” he concludes.

The plant’s processes comprise coagulation, flocculation, clarification, pressurised sand filtration and disinfection

JULY / AUGUST 2017

45

46

MAY/JUNE 2017

ODOUR CONTROL

Biotechnology T

he Department of Public Works (DPW) manages, owns or both manages and owns some 180 wastewater treatment plants (WWTPs) on behalf of other government departments – including Correctional Services, Defence and Health – and smaller facilities along border posts, among others,” explains Dindar, who is the strategic programme management facilitator at the DPW. “As with other plants in the country, our plants need to be Green Drop compliant; yet, when we participated in the 2014 Green Drop certifications, we fared poorly,” admits Dindar. He refers to the ‘Green Drop Progress Report 2014’, in which not 1 of the 121 systems assessed achieved Green Drop compliance. Further, 104 facilities were given Purple Drop status (<30% performance), with 9.9% of systems in a “poor state” and 86% in a “critical state”.

Dindar was appointed over a year and half ago, based on his background in strategic project management, with the mandate to introduce biotechnology – specifically enzyme solutions – as a way of drastically improving WWTP management.

“Of our 180 WWTPs, we chose 20 best-of-breed examples where we trialled

integration products from two different service providers. Of the DPW’s plants, less than half might be what you would call typical WWTPs, with the rest being for much smaller applications, such as septic tanks,” he explains.

Unbearable odours “Many of Correctional Services’ facilities run by the DPW have to handle waste from piggeries and dairy farms created to feed inmates affordably. The problem with such sites is that when a specific pond has been set up so that our WWTPs can handle the extra fat and grease characteristic of this type of effluent, these systems quickly become clogged and are then not properly cleaned. So they get bypassed. This of course causes odours that are completely unbearable, disincentivising the DPW’s maintenance service providers from doing what needs to be done,” Dindar bemoans.

Even at sites where livestock farming is not integrated, a build-up of thick, hard, solid sludge in the anaerobic sludge digesters can become a major problem, in terms of operational inefficiency as well as foul odours. “At the Zonderwater

E.coli levels and total suspended solids are some of the parameters most effectively lowered through enzyme dosing

As indicated by an innovative trial programme carried out by the Department of Public Works, enzyme dosing can drastically improve the management of its wastewater treatment plants. The department’s Yusuf Dindar discusses the benefits of innovation, as well as the challenges still faced.

By Frances Ringwood JULY / AUGUST 2017

47

”

ODOUR CONTROL

Zonderwater prison is one of the DPW sites where biotechnology has seen drastic improvements

Of the 121 systems assessed, not a single one achieved Green Drop compliance; 104 facilities were given Purple Drop status (<30% performance), with 9.9% of systems in a “poor state” and 86% in a “critical state”

Correctional Services plant, for example, the two anaerobic digesters there had completely filled up. The stench was unbearable and it was just not a conducive working environment. After just one week of dosing the digester, this sludge had broken down into a liquid form,” Dindar explains. After six weeks of dosing, the final sludge that collects in the drying beds had a much lower viscosity, making it easier for maintenance crews to clean.

With the sludge being more manageable, this presents an economic opportunity in the form of a fertiliser additive, which the DPW is currently investigating as part of an entrepreneurial programme that would run through the Expanded Public Works Programme.

More case studies The trial focused on five plant components, namely, the anaerobic digesters, the biofilters, activated sludge plants, pond systems and eutrophic dams where the build-up of large volumes of sludge had become an issue.

“After just a few weeks of dosing, we saw a marked improvement, particularly in total suspended solids. We also saw oil and grease reductions of as much as 96%,” says Dindar. “One particular site was receiving effluent from 2 700 pigs. The plant had not been designed for this and was completely overloaded. By dosing the pretreatment pond where aeration technology was installed, the liquid became such that the plant could operate as intended.”

One of the other trial sites was Leeukop prison, where dosing was used as an emergency measure after it was found that wastewater from the prison was being discharged into the Jukskei River, contaminating the Hartbeespoort Dam. “After a month of dosing, the thick sludge buildup had been broken up,” Dindar states.

Similarly, at Groenpunt prison, wastewater passes through a maturation pond before being discharged into a recreational dam.

Facilities not originally designed to handle effluent from piggeries need additional steps in the treatment process – the additional infrastructure needs to be kept clean

48

jul y /aug ust 2017

Fishermen in the area found the dam had become so contaminated that there were no longer any fish to catch.

“Here, we implemented headworks in combination with dosing. After a month, there were visible changes for the better.

After two months, we observed a vast improvement. After the success of this particular project, we are now investigating working with the Department of Environmental Affairs on a similar project for improving the Hartbeespoort Dam – odours and algae have been a sore point for homeowners in the area, so a smaller-scale application may yield analogous improvements,” asserts Dindar. He adds that dosing has also demonstrated remarkable results when it comes to eliminating E.coli. “We found high contamination rates (well above compliance levels) at Table Bay and at a river located at the Oshoek border post. Biotechnology has brought these levels right down to zero.”

Budget versus results Austerity and a more generalised need to find affordable treatment solutions are among the reasons that the DPW wanted to investigate biotechnology. Enzyme additives are inexpensive, especially compared to the kind of large capex usually earmarked for new WWTP builds or upgrades.

Additionally, results of the trial have seen an electrical cost reduction of up to 87% – where enzymes were implemented in conjunction with the necessary headworks.

Nonetheless, there have been some issues with the trial that will need to be addressed, according to Dindar.

“We have seen a backlash from traditional engineers whose answers would likely be to build a new site or enhance a current site.

This has actually been a major challenge, so we’ve had to deal with change-management issues. Similarly, we’ve had operators working at the same site for 20 years who now have to operate in new ways.

“Bad practices have been inculcated in their way of working and we need to deal with those types of issues. In light of this, future implementation of the technology will need to follow a coherent business architecture, integrating people processes and technology,” he concludes.

QFS As the world’s cities grow, the need for odour control at wastewater works and other waste handling municipal facilities has skyrocketed.

Herman Smit Managing director

What products and services does QFS offer to assist its public and private sector clients manage odours from municipal wastewater, effluent and leachate?

HS QFS saw the need for odour control at South Africa’s wastewater treatment plants and, so, began a process that eventually saw the company signing an exclusive South African distributor agreement with a highly regarded international company based in Poway, California. Through our partnership with Integrity Municipal Systems (IMS), we are able to provide the most effective odour control available. IMS is a specialty engineering company devoted to the design and supply of innovative, preassembled process solutions for the water and wastewater industry.

IMS’s compact, multistage odour control systems combine the low cost of biological oxidation with the high efficiency of activated carbon adsorption. Preengineered designs speed up delivery, while improving reliability and reducing cost. Every system is backed with an enhanced spare parts delivery and response system that keeps plants up and running. With over 20 years of experience, IMS has achieved a reputation for producing unique, practical and cost-effective solutions.

What type of environments/feedwaters are your offerings ideally suited to and why?

Odour control has moved from an afterthought to a primary design consideration for most collection and treatment facilities. As development encroaches on our facilities and our new neighbours become less tolerant of nuisance odours, wastewater professionals have found the need to address odour as a primary concern.

IMS provides a comprehensive review of the technologies available for the control of odours in wastewater treatment facilities. Vapour phase technologies available through our partnership with IMS include: biofiltration – a biological technology with low operating costs; wet air scrubbing – a reliable technology for chemical treatment; and adsorption – a well-established technology using dry media.

LEO 5 manometer with LoRaWAN

ISM band

Wireless manometer transmitter and remote display

LOW POWER PRESSURE SENSORS

GSM-2 with series 36 XiW level sensor

K-114 BT interface converter for digital + analogue pressure gauges

OPTIMISED FOR THE

INTERNET OF THINGS

LEO 5 manometer with Bluetooth Classic

GSM-2 Box with series 23 SY pressure transmitter

RFID data logger from the 21 DC series

Wireless RFID pressure transmitters pressure transponder with Bluetooth from the 21 D series Smart

KELLER unplugged!

The Internet of Things starts with a sensor.

Pressure transmitters and level sensors with digital interfaces are ideal for IoT solutions.

Their low supply voltages and optimised power consumption make them perfect for battery-operated wireless solutions.

Pressure ranges: 0,3…1000 bar / ATEX certification / Pressure and temperature data D line pressure transmitters I2C interface up to cable lengths of 5 m 1,8…3,6 V (optimised for button cells) 20 μW at 1 S/s and 1,8 V Total error band ± 0,7 %FS at -10…80 °C

X line pressure transmitters RS485 interface up to cable lengths of 1,4 km 3,2…32 V (optimised for 3,6 V lithium batteries) 100 μW at 1 S/min. and 3,2 V Total error band ± 0,1 %FS at -10…80 °C

keller-druck.com

INDUSTRY NEWS

Pressure dampers alone are not enough to protect pipe systems from damage caused by pressure peaks. Although the overpressure valves in pressure dampers respond when a certain pressure limit is exceeded, they are too slow for overpressure peaks, which can arise in milliseconds.

T

he most sensible solution is to install a special manometer like the LEO 5 from Keller AG für Druckmesstechnik to monitor the system. This manometer measures the pressure trend up to 5 000 times a second, detecting any extreme pressure with a high temporal resolution.

As the analysis shows the exact pressure trend over days, hours, minutes and seconds, it is easy to investigate the causes of pressure peaks. In one case, for example, it was determined that pressure peaks occurring in a freshwater system were a result of fire service deployment.

The LEO 5 combines accurate sensors with rapid, high-resolution signal processing, peak recording and a memory with a time stamp. All this is contained in a robust, stainless steel housing with safety glass. The large LCD display is very

As the analysis shows the exact pressure trend over days, hours, minutes and seconds, it is easy to investigate the causes of pressure peaks

1

Monitor pressure peaks

easy to read in any kind of light thanks to its 16 mm high digits and backlighting.

Capacitive touch buttons allow the user to navigate easily through the settings and measurements.

Effective damage protection In its special pressure peak analysis mode, the manometer offers a sampling frequency of 5 kHz and an analogue/ digital converter resolution of 16 bit. In standard measurement mode with precise limit monitoring, the pressure is measured and displayed twice a second with a 20 bit analogue/digital converter.

The smallest configurable measuring interval is one second. In total, the manometer’s memory has space for over 50 000 pressure peak values, complete with temperatures and time stamps.

The device can be connected to a computer via the USB interface and configured and read out using the free Logger 5

LEO 5 manometer 1. Standard version 2. With remote sensors 3. With Bluetooth interface 4. With LoRa interface

2

software. Data recorded is displayed in the form of a graph, which can be analysed and processed.

The LEO 5 can also be fitted with a Bluetooth interface for measuring locations that move or are hard to reach.

The parameter programming and data transmission are performed using the USB or Bluetooth interface, through which a customer-specific firmware version can also be installed if necessary.

Flexible and secure measurement technology The integrated rechargeable battery is charged via USB, allowing the manometer to be operated autonomously. The battery charge lasts for about a month with continuous operation in standard measurement mode and for about two weeks in peak measurement mode.

Remote access is also important, particularly in the age of Industry 4.0 and the internet of things. For these applications, there is an enhanced LEO 5 manometer with an integrated LoRa module, which offers a secure, bidirectional service. Thanks to the electronics’ modular structure and the serial interface, the system is easy to adapt to comply with customers’ requests and measurement requirements.

3

4

JULY / AUGUST 2017

51

INDUSTRY NEWS

New-generation pump a winner

T

In Africa, a pump range stands out once it becomes a trusted name in dominant water user sectors such as the agricultural market, and among implementing agents in charge of domestic water supply. These industries prioritise versatility, efficiency and reliability.

he latest generation of Efficient design KSB Pumps and Valves’ In intensive work with computational standardised Etanorm water fluid dynamics for flow simulation, KSB’s pump series meets these development engineers have also opticriteria, making it one of the longmised the hydraulic contours, making it est-running popular pump more efficient to easily meet types in use in Africa – as tough global efficiency well as the rest of the requirements, includ“In line with KSB’s world. Produced ing the benchmark common practice non-stop since EU requirements for industrial pumps, 1936, the Etanorm of Commission has sold more Regulation every pump will than 1.5 million 547/2012/EC for be supplied to the units, which have water pumps. customer with the proved themselves According to Dave impeller diameter over more than Jones, regional trimmed exactly to eight decades. In its sales manager, the duty point.” latest form, the pump KSB, the engineers comprises 43 pump sizes, placed particular focus which can be driven by either on obtaining an excellent two- or four-pole motors. The selection suction and a low net-positive suction chart has also been extended with head value, thus minimising the risk of additional pump sizes, so that sizes that cavitation and obtaining a smooth and are the closest to the best efficiency stable pump operation even in difficult point can be selected. operating conditions. This means the

pumps run reliably and contribute to a greater availability of the overall system.

He adds that the material range consists of cast iron, nodular cast iron, bronze and stainless steel. The diversity of materials and a large choice of seal variants have extended the suitability of the new series to applications beyond those of water.

The space allocated to the mechanical seal has also been enlarged to enhance venting and the new spacious design also facilitates the dismantling and reassembly of mechanical seals.

KSB Pumps and Valves’ new Etanorm pump boasts more than 80 years of proven reliability

52

jul y /aug ust 2017

Locally manufactured “In line with KSB’s common practice for industrial pumps, every pump will be supplied to the customer with the impeller diameter trimmed exactly to the duty point. Impeller trimming, combined with the large range of pump sizes available for selection, is the only way of keeping the energy consumption of the pump to the minimum necessary.

Operators benefit from the type series being manufactured at four different sites – in Germany, India, China and South Africa – which all comply with the same quality standards. This makes global procurement much easier; pumps and spare parts are readily available.

INDUSTRY NEWS

Going with the flow

P

rocess automation company Endress+Hauser South Africa has announced that its flow meter calibration laboratory has been SANAS accredited, in accordance with the recognised international ISO 17025 standard.

Calibration is critical to ensuring that a flow meter performs within expected specifications. Endress+Hauser is well positioned to support its local customer’s flow calibration requirements, including third-party meters.

Investing in reliability According to Wisane Hlungwane, workshop manager, Endress+Hauser, the company invested in its new calibration rig to support customers’ process safety and product quality requirements.

High-precision flow meters are not only a firm requirement for compliance, but also a prerequisite for customer satisfaction and cost savings.

“Our investment forms part of Endress+Hauser’s ongoing commitment to providing reliable instrumentation incorporating innovative and leading technology. With our SANAS accreditation, we now offer customers traceability of the calibration results to national and international standards via an uninterrupted ‘traceability chain’ of comparative measurements and calibrations,” says Hlungwane.

Flow calibration He points out that Endress+Hauser’s Product Centre: Process Solutions (PCPS) in Switzerland designed

Wisane Hlungwane, workshop manager (left), and Mzwabantu Nyakama, calibration specialist, both at Endress+Hauser

Endress+Hauser’s Flow Calibration Centre specifically for South Africa. It can accommodate flow meter sizes for calibrations from DN08 to a maximum size of DN100.

The Flow Calibration Centre has a maximum flow rate of 110 m3/h and its design is based upon a closed-loop water system. The water tank contains 200 ℓ of water. Hlungwane states that to achieve this flow rate, variable-speed drives (VSDs) and pumps are used.

ENGINEERING SUPPLY

CHAIN SOLUTIONS: CLEANER, CHEAPER, FASTER

Visit www.africaogp.com for more information BOOK NOW FOR THE CONFERENCE & ALSO VISIT THE EXPO AT THE CAPE TOWN INTERNATIONAL CONVENTION CENTRE Supporting partners and associations:

Powered by:

Organised by:

Be part of Africaâ&#x20AC;&#x2122;s Premier Environmental Technology Trade Fair.

Free entrance for online registrations www.ifat-africa.com/online-registration.php

Drop for Life The Knysna fires that ripped through the Southern Cape last June not only caused massive environmental devastation but also loss of life and property damage.

T

he Water Institute of Southern Africa stepped in with its ‘Drop for Life’ campaign in support of the Knysna community and firefighters’ efforts. “WISA and its members are keeping the Knysna community in their prayers and hearts, following the devastating bush fires,” commented Jaco Seaman, marketing and events manager at WISA. Water donation Through its ongoing Drop for Life campaign, and with the support of some members and service providers, WISA sent 2 500 five-litre bottles of drinking water to disaster management centres in George and Knysna. Water was distributed to community members in need and firefighters.

Donor companies include: DPI Plastics, Endress+Hauser, Veolia Water Technology South Africa and ImproChem.

“A special thanks goes out to the management and staff of Cascades Water in the Precap Centre in George, who worked through the night to ensure that the bottles were filled and ready for distribution this morning, and Garden Route Distribution in George for handling the logistics and packing at no cost,” adds Seaman.

Get in touch The WISA Drop for Life campaign is ongoing, proving drinking water to communities in need. Those companies or private individuals wanting to find out how they can get involved can email events@wisa.org.za.

Dozens lost their homes as a result of June’s fires in Knysna

pH

ORP µS/cm

fact

m g/l

O2

mg/l ClO2

Advanced process automation and quality monitoring in drinking or sewage water facilities Process analysis for the water and wastewater industry – technology driven by KROHNE • Extensive portfolio of analytic sensors, also with integrated transmitter technology, and complete measuring systems • Reliable analysis of parameters directly in the process, e. g.: – pH, conductivity, dissolved oxygen, turbidity, temperature – sedimentation monitoring, sludge zone tracking • Mounting assemblies and accessories, approvals from drinking water to Ex • Wide range of mounting assemblies and accessories

KROHNE South Africa 8 Bushbuck Close, Corporate Park South Randjiespark, Midrand, Tel.: +27 113141391 Fax: +27 113141681, Nirisha Harinarain, n.harinarain@krohne.com, www.za.krohne.com

Upcoming events WISA/IWA Water and river basement management conference Date: 9 to 11 October, 2017 Venue: Skukuza Camp, Kruger National Park, Limpopo Contact: rbm2017@savannaskills.co.za The conference will be hosted by the International Water Association (IWA) Watershed and River Basin Management Specialist Group in partnership with the Water Institute for Southern Africa (WISA) and IWA-South Africa, and will address cutting-edge issues related to sustainable watershed management, with a special focus on emerging issues related to climate change.

2nd International PeriUrban Conference Date: 26 to 29 November, 2017 Venue: Century City Conference Centre, Cape Town Contact: www.wisa.org.za

The Water Research Commission and WISA are hosting Peri-Urban 2017, the second International conference to the continent of Africa. The conference will be supported by the Water Innovations Division of WISA. 8th International Young Water Professionals Conference Date: 10 to 13 December, 2017 Venue: Cape Town, Western Cape Contact: IWAYWPconference@iwahq.org Following seven successful International Young Water Professional Conferences (IYWPCs) in the UK, Netherlands, Singapore, USA, Australia, Hungary, Taiwan, the International Water Association together with Water Institute of Southern Africa and the South African Young Water Professionals will organise the 8th edition of the IYWPC. Through technical paper sessions, topical workshops, soft skills learning

The theme for next year’s WISA 2018 event is ‘Breaking Boundaries – Connecting Ideas’

sessions, networking opportunities and a career fair, the IYWPC will be the “must attend” event for young water professionals, especially those wishing to develop their career and progress further into the water sector.

WISA 2018 Date: 24 to 27 June 2018 Venue: CTICC, Cape Town Contact: Jaco Seaman, events@wisa.org.za Every second year, the Water Institute of Southern Africa (WISA) holds its national conference for all water sector players in the region. The organising committee has already been selected, and the theme for next year’s event is 'Breaking Boundaries – Connecting Ideas'.

Index to Advertisers Aquadam

11

Keller

50

Rainbow Reservoirs

43

AquaPlan

44

Krohne

55

Rescue Rod

28

Aqua Resources SA

14

KSB Pumps & Valves

10

Rocla

22

Sappma

35

Sizabantu Piping Systems

34

Endress+Hauser

IBC

LANXESS

16

Enviroserv Waste Management

IFC

Macsteel Fluid Control

38

Franki Africa

25

Mather+Platt

33

Grundfos

36

Messe München South Africa

54

HD Drilling Contractors

30

Oil & Gas

53

OBC

Pexmart Quality Filtration Systems

Inkulu Plastic Pipes Johannesburg Water

56

jul y /aug ust 2017

2

Tintometer

8

TT Innovations

24

40

UWP Consulting

13

49

Veolia Water Technologies

OFC

Protecting our scarce resources.

Quality, efficiency, cost saving The scarcity of water in South Africa makes it extremely important to ensure it is safe and we can detect pollution threats immediately. Whether it is drinking water or effluent from waste water plants and industry or the surface water quality, there are merits in monitoring and recording the quality parameters online and visualising the measurements and condition of your instruments wherever you are.

Benefits of Endress+Hauser panel solutions • All instruments are correctly installed and pre-commissioned • A single transmitter can be used for up to eight parameters • The panel solution simplifies installation on site and saves commissioning time • Customer will have history of water quality measurements and can get early warning where these measurements are non-compliant Benefits of Endress+Hauser remote monitoring solution • Choose between different sets of measurement principles (pH, conductivity, SAC, turbidity, ammonium, nitrate, oxygen, sludge level and more) supported, enabling you to monitor what is important to you • Combine multiple locations and build an overview of your water network • Visualise your equipment and measurement on your smart device – wherever you are and whenever you need it • Set alarms and notifications and make it fit perfectly to your requirements www.za.endress.com/water

Endress+Hauser (Pty) Ltd www.za.endress.com info@za.endress.com Phone +27 11 262 8000 Fax +27 11 262 8062

Hennie Pretorius Industry Manager: Water and Waste Water Hennie.Pretorius@za.endress.com

Dare to commit WHEN PERFORMANCE MATTERS, RELY ON US Gauteng: +27 (0)82 909 1622 Natal: +27 (0)64 683 3324 Eastern Cape | Free state: +27 (0)84 446 6384 Cape Province | Northern Cape: +27 (0)82 574 4180 Limpopo | North West | Mpumalanga: +27 (0)82 909 1622 | +27 (0)82 574 4180

SUSTAINABLE BUSINESS PRACTICES

FULL RANGE OF FABRICATED FITTINGS, BENDS, TEES, STUBS & FLANGE AND REDUCERS

CERTIFIED HDPE PIPES

HDPE PIPE Manufacturers & Fabricators

CONTACT US: +27 (0)31 736 1055

www.inkuluplastics.co.za