Airmax Surface Aerator - Kamps

AIRMAX Low Speed Surface Aerator

Air for Life www.kamps.be

速

AIRMAX Technology at the Service of the Environment Water Aeration: a Vital Process

Cleaning water after its use, before returning it to our water courses, has now become indispensable.

An essential stage in the process of biological purification of waste water is its effective aeration.

Aeration of waste water ensures two essential functions simultaneously: • the addition of oxygen which is essential for the development of activated sludge; • the effective mixing of the activated sludge, to maintain the solid particles in suspension and ensure adequate homogenisation of the environment to be treated.

The AIRMAX Surface Aerator

Less Energy Consumed and More Advantages The development of the AIRMAX low-speed vertical shaft surface aerator has highlighted the fact that, in order to use less energy, the diameter of the impeller has to be wide, resulting in a lower rotation speed. The form and number of blades also play a primordial role. Energy efficiency is stable for a wide range of speeds.

Although the energy efficiency measured in clean water pleads in favour of fine bubble aeration systems, in field conditions, the AIRMAX surface aerator achieves greater energy efficiency.

Comparison of the AIRMAX Surface Aerator with the Fine Bubbles Aeration System = AIRMAX aerators 1 = poor / 5 = excellent = AIRMAX aerators 1 = poor = Fine bubbles SOTE is expressed /kWh / 5 = excellent = AIRMAX aerators 1 = poorin/kgO 5 = 2excellent = Fine bubbles SOTE = Fine bubbles SOTE is expressedisinexpressed kgO /kWh in kgO

ENERGY

p.

o.

ENERGY

ENERGY

n.

o.

p.

o. 4

n.

a.

5 4

3

n.

m.

5

2

1

1

m.

l.

p.

a.

5

b.

4

a.

b.

k.

OPERATION OPERATION

1

j.

g. i.

h.

c.

h.

d.

e.

f.

i.

COST

b.

d.

2

l. k. j.

2/kWh

3

l.

k.

COST

c.

3

2

m.

2

e.

f.

g.

DESIGNDESIGN

a. Equipment savings Equipment savings b. Civila.engineering works a. savings Equipmen

b. Civilsavings engineering works savings COST c. Assembly b. Civil engin c.

Assembly savings d. Operating savings

c. Assembly d. Operating savings e. Mixing d. Operating e. Mixing f. Dimensioning reliability f.

Dimensioning reliability e. Mixing g.c.

Noise limitation g. Noise limitation h. Ease of dimensioning f. Dimension h. Ease of dimensioning i. Mechanical reliability g. Noise limi i. Mechanical reliability j. Eased. of regulation j. Ease of regulationh. Ease of di k. Ease of maintenance k. Ease of maintenance i. Mechanic l. Experience Feedback l. Experience Feedback j. Ease of re m. SOTEm.(Standard Oxygen SOTE (Standard Oxygen

k. Ease of m e.Transfer Transfer Efficiency) Efficiency) n. Keeping Long Term Experienc n. Keeping LongOTE Terml. OTE

o. Alpha α o. factor Alpha factor α m. SOTE (Sta p. OTE p.

(Oxygen Transfer Efficiency OTE (Oxygen Transfer Efficiency

f.

Transfer E

in fieldinconditions) field conditions)

n. Keeping L

o. Alpha fact j. g. p. isOTE (Oxyg In field conditions, the superior energy efficiency of low-speed surface aerators AIRMAX DESIGN OPERATION i. proven in comparison to any other aeration in fie h. system.

75 AIRMAX

Best Science • Best Support • Best Success

Customised Solutions  Zero Emission Towards Zero Noise Emission and Zero Aerosol Reducing disturbance generated around water treatment plants is one of our constant concerns.

In order to limit noise pollution and aerosols, AIRMAX aerators can be entirely covered over (concrete or composite cover), in accordance with the requirements of the submitted project.

 Customisation KAMPS can optimise the aeration basin shape using its in-depth knowledge of the hydraulic flows created by the aerator, thereby optimising all aspects of the process.

The dimensioning of the aerator AIRMAX is studied in accordance with the various elements of the project, such as the oxygenation capacity, basin shape and the mixing.

MBR

AIRMAX Aerator Dimensioning Table SOTR (kgO2/h)

MOTOR POWER (kW)

AIRMAX DIAMETER (m)

SPEED (rpm)

11-15

5.5

1.15

70.1

15 - 19

7.5

1.3

65

19 - 26

11

1.5

58.2

26 - 35

15

1.7

53

35 - 40

18.5

1.7

56.7

40 - 50

22

1.8

51.3

50 - 65

30

1.9

51.6

65 - 80

37

2.1

46.2

80 - 97

45

2.3

42.7

97 - 117

55

2.5

42.7

117 - 160

75

2.75

37.7

160 - 190

90

2.75

41.6

190 - 230

110

3

37.2

230 - 270

132

3.25

33.4

270 - 330

160

3.25

37.4

330 - 400

200

3.5

32

Information subject to modification

Technical Advantages and Specifications  Technical Specifications

 Technical Advantages

E-motor

Gearbox Foundation plate

Shaft Immersion depth d

• very high SOTE, oxygen transfer efficiency under standard conditions (reaeration in clear water in accordance with the norm EN 12255-15 or Stora): 1.8 to 3 kgO2/kWh • constant efficiency over time • physical impossibility of clogging or fouling • high alpha factor, especially in the event of high activated sludge concentration • oxygen transfer rate (SOTR) of 10 to 450 kg O2/h per unit • total accessibility with no need to drain the basins • high mixing capacity (up to 6 m deep) • easy propulsion capacity (oxidation ditch) • power adjustment • no bearing in contact with the water • minimal maintenance • lifetime > 20 years

Impeller

D

Diameter: 1-4m Tip speed: < 5.5 m / sec Lifetime of the bearings: > 100,000 h Service factor: 1.5 - 2 Material: carbon steel Protection: SA 21/2 Epoxy 300 μm Bolts: hot-dipped galvanised steel Gears: low temperature drywell Options: sun shield composite cover floaters draft tubes Motor: IE1, IE2, IE3

The KAMPS Water Treatment Product Range Membrane bioreactors • Continuous sand filters • Deaerators • Sludge dewatering systems (belt thickeners, belt press, plate filter press) • Lagoon installations • Integrated M-BIOMAX and S-BIOMAX water treatment plants.

Best Science • Best Support • Best Success KAMPS is an industrial company specialising in water treatment. Its flexible structure enables it to guarantee its customers a fast, flexible and dynamic response to their requirements.

Contact us

KAMPS s.a.-n.v.

Tel : +32 (0)2 219 10 60 • Fax : +32 (0)2 217 41 31 • e-mail : info@kamps.be Head Office and Workshop: Rue de Nazareth, 5 • B-4651 Battice Sales Office: Beekstraat 70 Rue du Ruisseau • B-1970 Wezembeek-Oppem

www.kamps.be

LOW SPEED AERATOR AIRMAX® Specification for TENDER BOOK General Surface aerators will be mechanical aerators of clog free design suitable for installation on reinforced concrete supporting structures within the aeration tanks.

Each assembly will be completed weather proof and satisfactory for operation conditions duty and environment specified.

The impeller that can be in contact with sewage water will be obligatory in carbon steel protected by epoxy coating.

Each unit shall be individually driven by an electric motor through a reduction gearbox.

The aerators are low-speed, open type use for oxidation ditches, tanks or lagoons.

Vertical aerators will have rigid coupling between gearbox and aerator shaft.

The aerator installation will generally consist of the following parts:

Impeller Intermediate shaft Foundation plate Rigid coupling between shaft and gearbox Heavy duty gearbox Flexible coupling between gearbox and E motor E-motor

Construction In order to reach a no clogging impeller, the impeller has to be a flat base plate with anti clogging blades. The number of blades is minimum 12 and each blade is oriented with an angle of 30° in order to reach a good spread of splashing water in the space around the aerator.

The impellers have to be provided with three lifting lugs for easy installation.

The shaft is connected to the drive unit by means of a rigid coupling. All parts are connected with strength fastenings hot galvanized bolts. The foundation plate is provided with hot galvanized bolts to enable the horizontal adjustment during erection. Those bolts will be embedded in concrete deck that ensures a robust and vibration free mounting construction.

The coating of the aerator is epoxy suitable for sewage water. The minimum protection requirement is after SA2½ blast cleaned two layers of minimum 150 microns epoxy coating.

Impeller in polyester is not allowed Design The diameter of the aerator must be designed as following:

D = 0,15 x(SOTR) 1/2 + 0.8(*)

where: D= diameter in m

SOTR = Standard Oxygen Transfer Rate in kg O2/h in drinking water According EN 12-255-15 Those diameters can be higher to achieve a much better mixing. (*) For Carrousel system, replace 0.8 by 1.

The peripheral speed of the aerator is not exceeding 5.5 m/sec so that the possibility of sludge break-up is kept to a minimum.

The complete units will be capable of being started with aerator at the operating depth of submergence.

The up-trust of the aerator assembly will be equal or lower than the total weight of the impeller assembly in order to guarantee the longest life time of the gearbox.

The mains characteristics are: Low axial and radial forces ( no up-trust above impeller weight) Optimum efficiency Propulsion capacity and mixing capacity in oxidation ditches No-clogging of the aerator Hardly any maintenance Accuracy of performance is according ATV M 209 or EN 12-255-15.

Gearboxes The gearbox unit will have a design life of not less than 100.000 hours according to AGMA and be selected in accordance with recommendations for power transmission calculation.

For the selection of the gearboxes, the service factor is minimum 1.75 between nominal AGMA power of gearboxes and shaft power for oxidation ditches, and 1.5 for complete mixed tank.

Those factors are respectively 2 and 1.75 in case of oxidation ditches.

Gearboxes will be designed for continuous 24 hours/day operations and be classified for medium shock loading.

The efficiency of the gearbox is not less than 99% per stage.

The lantern on the gearbox is an obligation It is possible to disassembly the gearbox on site.

The gears and pinion shafts are manufactured from alloy steel, precision grinded to ensure high efficiency, maximum tooth strength low noise and vibration level.

For gearboxes with higher torque than 5000kN: -mechanical oil pump is an obligation to ensure a perfect lubrication of each bearing inside the gearbox -Integrated and inverted dry well is required in order to avoid oil leakage

DRY WELL

Recommended options: The gearboxes are fitted with lifting lugs and will be supplied complete with oil level indicator and connection for removing oil.

Internal surfaces will be protected with adequate protection film to long term storage if required.

Electric motors The motors are with cast iron frames and flanges , type B5 vertically mounted, and further according to IEC standard. Type eff1. (high efficiency) IP 55, V1 class F rise B Aluminium casing is not allowed.

Rain or sun canopy will be supplied.

The starting procedure of the motor will be DOL or soft starter or with frequency converter.

Aeration test : (suivant EN 12-255-15) (if required) Aeration test can be made to determine the SOTR (kgO2/h) in drinking water and the efficiency (kgO2/kwh) on the motor wire.

The test is done by a third party in the application field of the European standard EN 12-255-15.