SEWER SYSTEMS & SLUDGE MANAGEMENT For Interflow, which is carrying out the entire multi-million dollar contract, rhe works presented many of the challenges normally associated large contracts of this nature which are spread over a wide region. The planning and execution of a large volume of work on rime and on budget, while ar the same rime renovating underground pipelines without excavation or undue d isturbance to Sydney Water's customers is a challenge in itself. Another challenge was that, inevitably, some of these pipelines were in locations where access for project equipment was extremely d ifficu lt. A particular challenge was presented by rhe pipelines on the banks of rhe Georges River at Illawong. For rhe residents, ir is an idyllic location with spectacular water views that seems a long way from the busy Sydney metropolis. For Incerflow, however, ir meant using all their experience as Australia's largest sewer rehabilitatio n specialist to get equipment to the sire and complete the project. The 19 lengths (282 m) of pipeline at Illawo ng were located half way up a very steep bank of rhe Georges River. Truck access to the pipelines was effect ively impossible. I ncerflow therefore decided that rhe most p ractical way to gain access was to load rhe equipment o nto a barge on the far side of the river, then un load it via a boar ramp on rhe Illawong side. From here, rhe equ ipment was manually carried into position, at rimes a distance of several hundred metres up a steep bank in dense bush land . lnrerflow installed the Australian developed Rib Loe Expanda Pipe sewer lining system, a spirally wound structural liner installed by winding a continuous strip of uPVC profile from a machine placed at the base of an exist ing manhole. The system is extremely portable as ir does nor require hearing, curing or water boilers for insrallarion. T h e 19 lines were com p ieced within three weeks with minimal disruptio n to Sydney Water's clients, again showing the versatility and effectiveness of this innovative rrenchless solution.
For more information, telephone (02) 9631 2444.
VEOLIA WATER REUSE WORKSHOPS PUSH WATER REUSE TO CENTRE STAGE Veolia Water recently organised a series of recycled water workshops attended by regulators, government policy sraff, infrastructure advisors, plus senior management from water autho rities. The workshops were held in Brisbane, Sydney Melbourne, Adelaide and Perth. The workshops aimed to share Veolia Water's experience in reuse projects in Australia and overseas, as well as ob tain fee dback from water authorities and industry on local needs and on how recycled water p rojects could play an important role in managing water resou rces. The workshops identified the main barriers inhibiting the implementation of major water recycling projects included lack of fi nancial incentives, lack of recognition of triple bottom line benefi rs of water recycling, lack of uniform project evaluation, and the approval processes fo r water recycling p rojects. Managing existing resources more efficiently and identifying new water sources are the company's core business strengths as demonstrated by rwo recent projects - rhe Illawarra Wastewater Strategy and the Gerringong Gerroa Sewerage Scheme. T he Illawarra Wastewater Strategy in NSW, commissioned by Sydn ey Water, involves upgrading three wastewater treatment plants south o f Sydney to serve 300,000 residents. Ar rhe heart of this project is a water reclamatio n plant which will use Memcor™ Continuous Membrane Filtration {CMF) and Reverse Osmosis (RO) technologies to recycle 20 million litres a day of sewage for reuse by BlueScope Steel at Port Kembla.
The water reclamation plane will be one of the la rgest wastewater reuse faci li ties in Australia, providing dual environmental benefits of decreasing ocean wastewater discharge volume by 40%, and decreasing the use of potable water in the steel-making process by more than 60 %. The Gerringong Gerroa Sewerage Scheme, also delivered on behalf of Sydney Water, incorporates a sewage treatment plant wh ich uses an advanced tertiary treatment process to treat effluent for reuse in local agriculture. The process includes screeni ng, degritring and flow measuring; biological treatment, clarification and sand filtration; and ozonario n, Biological Activated Carbon {BAC), microfilrrario n and UV disinfection. T his high level of treatment is rhe most advanced for any sewage treatment plant provid ing services to a local commun ity.
For more information contact Michael Boake, Technical Director Wastewater for Veolia Water Australia, on (02) 8572 0300.
ANALYSING THE FREQUENCY OF FAILURES JWP is assisting water authorities in Queensland and NSW with the upgrading o f their wastewater treatment facil ities. T he upgrades are often being driven by new requi rements to meet very low nutrient levels in receiving water, recycling opportunities and increasi ng population growth . JWP is currenrly involved in the design of planes either under construction or about to enter rhe construction phase in NSW and Queensland. All of these plants are required to meet stri ngent coral nitrogen consent levels and some are also required to meet phosphorus consent requirements.
Complete "Trenchless" Pipe Renovation Solutions
lnM RoaN™
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Structural Rehabilitation of Main Pipelines 150mm-1,800mm Rehabilitation of House Service Lines Structural Spot Repairs, Robotic Repairs, Sealing, Cleaning and CCTV Services Maintenance Hole Rehabilitation
AU STRALIA
WIDE
1800 25 1240
Web : www.interflow.com.au Ema iI: mail@interflow.com.au water
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