wks AW-Produktkatalog 2017GB wks Produkt · brane surface through air flow (cross flow), chemical intermediate and intensive clean-ing with substances such as sodium hypochlorite

WASSER.ABWASSER.ENERGIE

Wastewater Treatment Business UnitTechnologies and Products

WATER

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M A I N T E N A N C E & S E R V I C E

T R A I N I N G

O P E R AT I O N M A N A G E M E N T

CO M M I S S I O N I N G

I N STA L L AT I O N

O P T I M I S AT I O N

P R O D U C T D E V E L O PM E N T

P R O D U C T I O N

AU TO M AT I O N

M E C H A N I C A L E N G I N E E R I N G

P R O C E S S E N G I N E E R I N G

CO N S U LT I N G & P L A N N I N G

CO N ST R U C T I O N W O R K

T U R N K E Y P L A N T CO N ST R U C T I O N

B U S I N E S S U N I T

WASTEWATER TREATMENTPROCESS ENGINEERING SOLUTIONS FOR OPTIMUM OPERATIONAL SEQUENCESMECHANICAL & ELECTRICAL ENGINEERING PRODUCTS, SYSTEMS, COMPLETE PLANTS

If wastewater, no matter how different its properties are, is to be treated highly effectively and efficiently, we offer continuous and functionally coordinated technologies and products – through to turnkey plant construction.

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T E C H N O L O G I E S

2 Process-optimised activated sludge process

3 Anaerobic wastewater treatment

4 SBR technology

6 Membrane bioreactor

8 Phosphorus recycling using MAP precipitation

1 0 Desalination process

1 1 Chemical metering station

P R O D U C T S

14 Clean water removal (decanting)

16 Clean water removal (decanting)

1 8 Vertical agitator

20 Automatic floating sludge extractor

22 Automatic floating sludge removal equipment

24 Automatic turbid water removal

A D V A N TA G E S

• By using the RBS activated sludge control system the plant works at alltimes in the optimum process enginee-ring and economic operating point

• Maximum possible nitrogen eliminationwith operating costs-optimised use ofenergy

• Largely biological and chemical phosphorous elimination

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PROCESS-OPTIMISED ACTIVATED SLUDGE PROCESSProcess and energy-optimised activated sludge process with dynamic processcontrols results in maximum elimination rates with minimised operating costs

A R E A S O F U S E | A P P L I C AT I O N

• Municipal wastewater treatment in combined wastewater and separate systemfor sizes from 500 PT to 500,000 PT

• For industrial wastewater treatment incombination with magnesium-ammo-nium-phosphate (MAP) precipitation andanaerobic pretreatment

• Combination with wks metering technology• In adaptation to the plant size, activated

sludge separation with secondary settle-ment tank flowed through horizontally orvertically, or by means of pressure releaseflotation

• Can be implemented as a round/ rectangular form, as a compact TRIUNOtank or as a combination tank

T E C H N O L O G Y | P R O C E S S

The process-optimised activated sludgeprocess applies to wastewater plants in con-tinuous operation. The aeration takes placedepending on the wastewater to be treated,through fine bubble pressure aeration orejector aeration. The tank circulation is generated optionally by pulse aeration, horizontal agitators, ejectors or by means ofvertical agitations. Nitrification and denitrifi-

cation can be implemented as intermittent,upstream, downstream, simultaneous or asa cascade. Alongside the biological processthe chemical phosphorous elimination isimplemented as simultaneous precipitationor post-precipitation.The key point of the optimised process is theintelligent, dynamic control of nitrificationand denitrification depending on the inflow-ing quantity of wastewater and the load; theplant thus always works in the in optimumoperating point and highly energy-efficient.The separation of the activated sludge/cleanwater mixture takes place by means of gravitysedimentation in the secondary settlementor in case of poor settling properties, bymeans of pressure release flotation.

PROCESS ENGI N EERI NG COMPON ENTS

• Process-relevant equipment for aeration,circulation, secondary sedimentation andflotation

• Automation technology incl. RBS activationcontrol module for optimisation of thenitrification, denitrification and phosphorouselimination process

• Intelligent networking of the individualprocess engineering steps

2 | WASTEWATE R TR EATM E N T B U S I N E S S U N I T


ANAEROBIC WASTEWATER TREATMENTApplication-optimised anaerobic wastewater treatment and energy recoverywith efficient pre and post-treatment


• Industrial wastewater treatment• Can be used for COD concentrations of

1,500–20,000 mg/l COD• Combination with MAP precipitation and

aerobic post-treatment with SBR or aerationplant

• Combination with wks metering technology• Biogas recovery with CHP or micro gas

turbine


The COD in the wastewater is converted into biogas and a small quantity of surplussludge. The biogas produced is separatedand if necessary cleaned or desulphurised.

The biogas is recovered by means of CHP ormicro gas turbine.The optimum pretreatment, process selectionand optimum gas treatment and recoveryfor the respective application case areselected, depending on the wastewatercharacteristics. Deepening on the special use conditions, tried and tested anaerobicreactors of European manufacturers areused, for example, UASB, R2S and IC.High process efficiency is achieved as a resultof the process integration of the anaerobicand energy technology in the overall solutionof the wastewater treatment plant and theapplication-optimised control of the processsteps.

A D V A N TA G E S

• Manufacturer-independent selection of the best process management forthe special application case

• Process-optimised pretreatment andpost-treatment of the wastewater

• High process efficiency and processsafety

• Operating cost savings

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SBR-TECHNOLOGYIntelligent, dynamic, load and quantity-controlled SBR technology


• Municipal wastewater treatment in combined wastewater and separate systemfor sizes from 500 PT to 300,000 PT

• Industrial wastewater treatment• Especially for industrial wastewater

treatment in combination with MAP precipitation and anaerobic pretreatment

• Combination with wks metering technology• One to 4-lines, optionally in combination

with inlet/discharge storage tank, in adaptation to the plant size


The SBR process is a form of activated sludgeprocess. The spatially separated functionalcomponents of a conventional aerationplant are implemented with time separationin one tank in the SBR process. The waste-water treatment takes place during the reaction phase, during the subsequent sedimentation and decanting phase theactivated sludge is separated from the treated wastewater. Depending on the wastewater to be treated, the aeration isimplemented through fine bubble pressureaeration or ejector aeration. The tank is circulated optionally by pulse aeration, hori-

zontal agitators, ejectors or by means of vertical agitators mounted on the cleanwater decanter. Depending on the overallconfiguration, batch feeding to improve thesludge settling properties and biologicalphosphorous elimination are possible.The innovative core of wks SBR technology isthe intelligent, dynamic and load-dependentcontrol of the process phases and technicalsystem with turbidity-controlled removal ofclean water, water level-dependent verticalagitator and automatic floating sludgeremoval.Clean water removal follows the cleanwater/activated sludge phase boundarylayer, in this way the sedimentation anddecanting phase is limited to a minimum.


• HydroSys equipment system with:• HydroMix vertical agitator• HydroDek clean water removal (decanter)• HydroKlar PLUS optional clean water

removal• HydroAss floating sludge removal

• Automation technology incl. RBS-SBR control module for process optimisation

• Energy-optimised aeration system


A D V A N TA G E S

• By using the RBS SBR control systemthe plant works at all times in the optimum process engineering and economic operating point

• Maximum possible nitrogen elimina-tion with operating costs-optimiseduse of energy

• Extensive biological phosphorous elimination.

• Prevention of unwanted phosphorousredissolution at the end of the reactionphase.

• Turbidity controlled, surface and laminar clean water removal

• Precisely matched functional characteristics of the components foran optimum process workflow to ensurethe specified effluent discharge values.

• Energy cost reductions

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MEMBRANE BIOREACTORHighly effective membrane filtration process as an alternative to the conventional activated sludge process


• Use in municipal and industrial waste-water treatment as a space-saving conceptwith high cleaning capacity

• Phase separation by membranes instead of settling process – therefore high totalsolids in the activated sludge, compactdesign and solution without secondary settlement tank possible


In the MBR process the membrane modulereplaces secondary settlement. Plant struc-ture volume can be saved due to increasedtotal solids in the aeration tank.The aeration tank is combined with a membrane filter to separation water andactivated sludge. The biologically treatedwastewater is drawn in through the mem-brane. The biomass remains in the aerationtank or in the filter chamber and must beremoved separately.

The process engineering design of the MBRplant is carried out as optimisation betweenthe design of the aeration tank (tank volume,total solids, sludge age, air requirement, etc.)and design of the membrane filtration(membrane area, number of filtration units,filtration volume, permeate flux, etc.).Various process steps are necessary for themembrane cleaning: Backwashing with filtrate, creation of turbulences at the mem-brane surface through air flow (cross flow),chemical intermediate and intensive clean-ing with substances such as sodiumhypochlorite or citric acid, or similar. Totalsolids in the activated sludge: 8–15 kg/m³,membrane pore size: 0.1–0.4 µm



• Extremely fine screens for mechanical precleaning

• Aeration tank, if applicable with filtrationunits (integrated MBR system)

• Membrane filtration tank (for separateMBR system)

• Permeate/backwashing pumps, returnactivated sludge pumps (with downstreamfiltration tanks), surplus sludge removal

• Cross-flow blower• Chemical metering for membrane cleaning

A D V A N TA G E S

• Compact volume due to high biomasscontent in the activated sludge stageand doing without a secondary settle-ment tank

• Easily extendable• Outstanding treatment capacity with

regard to carbons and nutrients asmembranes are partially permeablestructures, which retain organic andinorganic solids, bacteria and substances attached to solids (solids 0 mg/l, COD < 30 mg/l)

• Extensive disinfection of the treatedwastewater (bathing water quality,water reuse as non-potable water, key water reuse technology)

• High degree of operating reliability dueto the formation of parallel lines, nosludge output through bulking or float-ing sludge; independent of the settlingproperties of sludge

• Very good usability in upgrades / exten-sions to existing wastewater treatmentplants, if applicable can be used forpartial flows only

• Membrane filtration plants run fullyautomatically, no operator interventionrequired in normal operation

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PHOSPHOROUS RECYCLING USING MAP PRECIPITATIONEco-effective phosphorous recycling of wastewater containing phosphorous forcost-effective use of the nutrients in agriculture


• Use in P-containing wastewater (PO4-P > 70 mg/l, PO4-P > 100 kg/d)

• Very effective in combination with anaerobic pre-treatment

• Optional batch or continuous flow operation• Depending on the MAP quality requirement,

various options available for treatment ofthe separated MAP


The formation of magnesium – ammoniumphosphate crystals ("MAP", struvite) isachieved by pH adjustment (pH > 8.1),Mg(OH)2 metering and by adjusting theNH4-N concentration (if necessary). The tankis circulated by means of medium-sized bubble aeration and causes intensive chemi-cal mixing and extension of the MAP crystalcontact time. To retain the MAP crystals,

a parallel plate separator is used at the tankoverflow in the continuous flow process. Inthe batch process the crystals are retainedby gravity sedimentation. The demand-orientated NH4-N metering is achieved bydetermining the NH4-N concentration bymeans of ion-selective measurement. Thenecessary Mg metering is determined bymeasuring the PO4-P concentration. Positive-displacement pumps are used the cyclicalMAP removal. The MAP dewatering using ascrew extruder, optionally in combinationwith MAP scrubbing to improve the MAPquality (reduction of the volatile solids [VS]).Optimisation of the MAP crystallisation isachieved with the help of turbid waterreturn. Use of the RBS-MAP control moduleensures that optimum efficiency of the PO4-P elimination with the lowest possible oper-ating costs.



MAP set consisting of:• Process-relevant equipping of the reaction

tank (aeration, inlet and discharge system,MAP removal, MAP dewatering)

• RBS-MAP control module for process optimisation

A D V A N TA G E S

• Eco-effective phosphorous • More economical use of supplies

through control module for processoptimisation

• Reduction in the surplus sludge produced in a downstream aerobictreatment stage (reduced precipitatedsludge quantity)

• Increase in the VS of a downstream aerobic treatment stage (clearlyreduced precipitated sludge)

• Increase in the operational reliability ofa downstream aerobic treatment stage(increase in the sludge age)

• Reduced energy costs of a downstreamaerobic treatment stage (NH4-N isincorporated in struvite)

• By stripping carbon dioxide, pH increasewithout adding chemicals

• Marketing of the separated MAP

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DESALINATION PROCESSSalt load reduction of industrial wastewater with high salt content using the electrodialysis process - an innovation in wastewater treatment


• Industrial wastewater treatment• For wastewater or wastewater partial

flows with a conductivity of 50 mS/cm orhigher, can be used effectively for waste-water quantities of 50 to 500m³/d

• Combination with wks metering technology• Modular structure• Concentrate treatment with membrane

distillation through to material recoverypossible

• Seawater and brackish water desalination


Desalination takes place by means of anelectrochemically driven membrane process,in which ion exchanger membranes are usedin combination with an electrical potentialdifference for partial desalination. Waste -water-dependent realisation with pole rever-sal is possible so that, in combination withsuitable treatment chemicals, the treatmentcan take place under energised conditions.The process is characterised by conductivity-dependent, batch-wise operation of the concentrate and diluate flow and electroderinsing.

Depending on the wastewater characteristics,the wastewater is pretreated by suitable fil-tration processes. The concentrate (10–20%)is fed into a concentrate store. The dilute(80–90%) is added to the further treatmentprocess. Conductivity-dependent control ofthe batch-wise operation of the diluate andconcentration flow. An appropriate controlsystem ensures automatic cleaning withwastewater-specific cleaning chemicals (CIP).


• Process-relevant equipment for pretreatment• Electrodialytic equipment• Membrane packages, CIP• Automation technology

S E R V I C E S

• Plant piloting to determine the suitabilityof the process, to determine the optimummembrane and to select the best treatmentand cleaning strategy

• Detailed design of the process engineering,the plant and E-I&C technology

• Realisation of complete plant• Commissioning/optimisation/training/

service

A D V A N TA G E S

• Energy-efficient partial desalination• Depending on the membrane selection,

selective desalination of 1 valent ionspossible

• Increase in membrane service life byoperating with pole reversal

• Wastewater-specific manufacturer-independent membrane selection

• Wastewater-specific selection of theoptimum CIP recipe

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CHEMICAL METERING STATIONOptimum chemical meteringAchieving the required treatment targets with minimum consumption throughintelligent linking of mechanical engineering and automation

A R E A S O F U S E

• Municipal and industrial wastewater treatment

• Water treatment• Sludge treatment

A P P L I C AT I O N

• Minimisation of the PO4 discharge values• Improvement in sludge settlement and

dewatering properties• Neutralisation• pH adjustment• Optimisation and levelling out of the

nutrient balance• Pretreatment through flocculation in the

primary sedimentation• Water treatment

C H E M I C A L S U S E D

• Acidic metered chemicals such as: Ironchloride, iron chloride sulphate, aluminiumsulphate, PAC, iron (II) sulphate, ammoniumsulphate, phosphoric acid, hydrochloricacid, etc.

• Alkali metered chemicals such as: Sodiumaluminate, sodium hydroxide, limewater,magnesium hydroxide, sodium hypochlorite

• Urea

• Anionic and cationic polymers• Defoaming agents• Organic acids: Formic acid, citric acid,

acetic acid• Methanol, ethanol and other carbon

sources• Oxidants: Potassium permanganate


The metering is a complete system consistingof storage tank and metering station withcontrols for metering chemicals. The meter-ing station, switchgear and control systemare accommodated in the protective cabinet.The materials are suitable for the respectivechemicals used. The pressure pulsationdamper located downstream of each pumpensures removal of pressure peaks and low-pulsation flow. The overflow valves requiredfor each pump protect the pumps, whichtheoretically can build-up an infinitely highpressure. Pressure maintaining valves ensurea constant pressure in the metering system.The quantity of metered medium can bemeasured using an optional MID or oval-gearmeter. The control system for the pumpedquantity is activated by a measuring devicein the tank and ensures optimum addition


of the metered medium depending on thewastewater level. The requirements for integration in a process control system arefulfilled.


• Storage tank and metering station for out-door and indoor installation

• Outdoor installation:• Storage tank with and without insulation

and heating• Metering station and switchgear and

controlgear in weatherproof cabinet• Indoor installation:

• Storage tank with and without exhaustair (off-gas) treatment

• Supply and exhaust air routed to the out-side

• Metering station with splash protection• Lifting plants for tanks• Metering station with metering plate,

switch and control cabinet as a preassem-bled unit

• Compact metering station in the safetymodule container with IBC as chemicalstore

• Control systems for delivery rate• Link with process control system possible


A D V A N TA G E S

• Optimum combination of mechanical,electrical and automation engineeringcomponents

• Control system for economical chemical consumption

• Modular system ensure optimum station size and therefore reducesinvestment and operating costs

• Integration in any process control systems already installed is possible

• Easy to operate• Fault/failure management• Can be easily retrofitted

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A D V A N TA G E S

• Unsinkable construction, water level-guided for replacement volumes up to50%

• Arrangement of the inlet opening prevents flowing sludge removal

• Optimum process sequence with incor-poration of the wastewater conditionin the tank in the control regime andintegration in the process control system, and with it reduction in theprocess time

• Increase in process efficiency and thusreduction in costs

• Bus and ethernet link• Good accessibility for maintenance due

to the man-accessibility of the device• Substantial reduction in storage

volume for new designs• Suitable for plant extension as a retro-

fit solution

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CLEAN WATER REMOVAL AW-HYDRODEK

Water-level guided floating clean water removal device for large dischargequantities up to 1,500 m³/h with optimum process integration and turbidity-dependent control of the clean water outflow


• SBR wastewater treatment plants• Pond wastewater treatment systems• Industrial wastewater treatment plants• Water supply plants

P R O D U C T D E S C R I P T I O N

The task of clean water removal (decanting)equipment in SBR technology is, after adequate sedimentation of the activatedsludge, to separate out the clean waterphase, without removing unacceptablequantities of activated or floating sludge at the same time. The new type of designsolution guarantees this requirement is ful-filled to a high degree. The system consistsof a float combined with an underwaterdraw-off funnel. Following release of thetime regime or turbidity measurement thedraw-off funnel is lowered and clean wateris drawn off via the movable discharge pipe.Due to the floating design, the dischargeequipment follows the water level with anyenergy input.With the tried and tested wks control systemaccording to the discharge quantity and tur-bidity, the clean water is removed during thesedimentation phase and thus reduces theprocess time. After the removal time hasexpired or increased turbidity measurementthe outlet closes again fully-automaticallyand a new SBR cycle can begin.

D E S I G N F E AT U R E S

• Automatic adaptation to rising and falling water level as a result of pivotedconstruction

• Homogeneous, horizontal and low-turbu-lence surface clean water removal

• Clean water removal below the water surface in combination with a scumboardprevents the intake of floating sludge

• Completely closed system during the reaction phases

• Discharge quantities recorded withoutadditional discharge measurement

• Dynamic, turbidity control, through whichthe sedimentation and removal phase isadjusted to the actual sludge settling properties

• Static support for securing the minimumwater level

• Sizes available for discharge quantitiesfrom 250 to 1500 m³/h


C L E A N W AT E R R E M O V A L AW-HYDRODEK


CLEAN WATER REMOVAL AW-HYDROKLAR-PLUS

Automatic clean water removal from SBR and sedimentation tanks with compact design for discharge quantities up to 300 m³/h


• SBR wastewater treatment plants• Industrial plants with sedimentation tanks


The task of clean water removal in the SBRtechnology or in settlement tanks, followingsufficient sedimentation of the activatedsludge, to separate the clean water, withoutpicking up unacceptable quantities of activated sludge or floating sludge parts bymixing the liquid layering or surface removal.The Hydroklar-Plus is designed as a compactremover based on a drip channel gate withdischarge chamber.The overflow edge of the gate is locatedabove the water level, outside of the removalphase. The start and end of the removalphase can be set according to a time, level orturbidity regime. The time-controlled or turbidity-controlled start signal switches onthe drive motor and the gate is opened viathe spindle.The clean water flows over the overflowedge of the gate in the discharge chamber.The scumboard connected to the gateensures that the floating sludge is held back.The inlet area of the scumboard is designedto ensure horizontal, surface inflow. In thisway it is possible to move very close to thesedimentation boundary and to achieve amaximum exchange volume, without thesedimented sludge being swirled up to anunacceptable extent.On reaching the specified fill level or exceed-ing the turbidity limit the drive is stoppedand removal is ended. The gate is moved toits top end position or is controlled in theturbidity regime so that it continuouslymoves ahead of the rising water level.


• Preassembled dropped channel gate withdischarge chamber (made of stainlesssteel) in compact design is anchored ontothe tank wall

• Flow-optimised surface inlet prevents inletturbulence

• Front-mounted, floating sludge repellingscumboard

• Controllable electric motor drive• Control system by time, discharge quantity

and turbidity possible• Dynamic control system simultaneously

adjusts the overflow edge to the fallingsludge layer

• Heating strip surrounds the gate guide(optional)

• Device for sampling in the discharge chamber

A D V A N TA G E S

• Simple, compact design with highdegree of functional safety and reliabil-ity results in shortening of the removaltimes and maximising of the exchangevolume

• Sludge barrier prevents the removal offloating sludge

• Turbidity as the control variable resultsin controlled clean water removal, saving of response time due to theoverlapping of sedimentation andremoval time

• Functions as an emergency overflowand can be optionally equipped withheating and sampling

• Good accessibility for maintenance andinspecting the discharge

• Can be used for new wastewater treatment plant construction and retrofitting

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C L E A N W AT E R R E M O V A L AW-HYDROKLAR-PLUS

A D V A N TA G E S

• Automatic adjustment to rising or fal-ling water level

• Uniform mixing of the tank contents asa result of preceding flow simulation

• Control system ensures optimum circulation capacity (speed) by recor-ding the level and turbidity

• Increase in process effectiveness andreduction in energy consumption compared to conventional agitators

• Individually adaptable activation• Good, safe accessibility to drive and

measuring probes• Very suitable as retrofit

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VERTICAL AGITATOR AW-HYDROMIX

Floating, vertically acting agitator with flow-optimised arrangement in the tank


• SBR wastewater treatment plants• Conventional wastewater treatment plants• Pond wastewater treatment systems• Industrial wastewater treatment plants• Other mixed processes


HydroMIX is a floating service mixer formedas a vertical agitator for complete mixing ofthe reactor content. Due to automatic adjust-ment of the circulation capacity to the waste-water condition and the tank fill quantity, anoptimum flow is generated, which essentiallyprevents oxygen input during the anoxic andanaerobic phase. At the same time forcedpumping of the floating solids to the unittakes place, and with it automatic remixing.Automatic control of the circulation outputincreases process effectiveness and reducesenergy costs.


• Floating, unsinkable system with attachedelectric drive, measuring probes and railings, man accessible

• Agitator is operated by an attached electricmotor

• Optimally arranged in the tank with the help of flow simulation

• Designed as a low-speed motor• Frequency control of the circulation output

on the basis of the level and turbidity andthus the sludge settlement properties

• Sizes are adjusted individually to the tankvolume

V E R T I C A L A G I TAT O R AW-HYDROMIX



A D V A N TA G E S

• Automatic adjustment to rising or falling water level

• Removal rate adjustable and variableduring operation

• Flow individually adjustable• Best possible anti-corrosion protection

due to especially selected materials• Delivered ready for use• Low maintenance design• Very suitable as retrofit

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• SBR wastewater treatment plants• Conventional wastewater treatment plants• Pond wastewater treatment systems• Industrial wastewater treatment plants• Other mixed processes


The automatic floating sludge extractor isfloating surface removal equipment, whichworks together optimally with the verticalagitator (AW- HydroMIX) and has been tes-ted and trialled in flow simulation. A special fixing is provided for this on eachAW-HydroMIX. All kinds of different floatingmedia can be easily extracted by the electri-cal submersible pump, even in case of waterlevel fluctuations. The pump type is especi-ally designed and produced for use of theextractor. Special acid protection ensuresmaximum resistance to chemical exposureand provides good protection propertiesagainst all liquid materials.


• Floating, unsinkable system with attachedfree-flow impeller submersible pump

• Optimally arranged in the tank with thehelp of flow simulation

• Adjustable height suction inlet for optimisation and local adjustment

• Sizes are adjusted individually to the tankvolume

AUTOMATIC FLOATING SLUDGE EXTRACTORAW-ASSS

Floating, vertically acting extraction with flow-optimised design, which removes the floating sludge produced constantly independent of the wastewater level in the tank.


A U T O M AT I C F L O AT I N G S L U D G E E X T R A C T O R AW-ASSS

A D V A N TA G E S

• Simple design and high functionalreliability

• Can be easily retrofitted• Compatibility with conventional control

systems• Minimum operator work

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AUTOMATIC FLOATING SLUDGE REMOVAL EQUIPMENT AW-ASSA 200/E

Effective solution for the removal of floating sludge


The removal device is mounted in aadjustable height position on the edge ofthe tank or on the operator catwalk. A retro-fit is therefore easily possible. The sludgeremoval consists of a submersible pump anda pulsating pipe system. The interactionbetween intake and drive forces causes theintake opening to dip and rise. The sludgeintake area has a diameter of approx. 4 m.Depending on the tank size, the place ofattachment and flow conditions, one or several decanters can be installed. In auto-matic the pause-running time can be con-trolled by any conventional control system.


• Primary and secondary settlement tank for wastewater treatment without scraperequipment

• Industrial plants with settlement tanks


The ASSA 200/E automatic floating sludgeremover is used to remove floating sludgefrom settlement tanks (primary settlementtanks, secondary settlement tank).Depending on the tank size, the place ofattachment and flow conditions, one or several decanters can be installed.The sludge is drawn in by a pulsating pipesystem and is pumped into the sludge stor-age tank. A submersible pump is installedunderneath the pie system. The floatingintake pipe equalises the usual water levelchanges in the preliminary and secondarysettlement tank. The intake capacity andwater level are easily adjusted via a ballvalve. Sludge removal can take place inoptional automatic or manual mode.


A U T O M AT I C F L O AT I N G S L U D G E R E M O V A L E Q U I P M E N T AW-ASSA



A D V A N TA G E S

• Fully-automatic, reliable removalthrough innovative solution (reflectionprinciple) for turbid water and positiondetection

• Optimised tank utilisation andimproved thickening

• Compact design largely prevents entanglement and entwining

• Full integration in the control equipmentof the wastewater treatment plant

• Safe operation due to standard ATEXcertification

• Suitable for any tank type or shape,including tanks with agitators or rakes

• Good accessibility, virtually mainte-nance-free

• Installation possible during on-goingoperation

• Substantial savings in sludge disposalcosts

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AUTOMATIC TURBID WATER REMOVAL AW-ATAB-15

Turbid water removal for stacked sludge containers with automatic detection of the turbid water zone


• Sludge containers in municipal and industrial wastewater treatment plants


After the start release the combined removaland sensor unit moves slowly, via a freelymovable lifting device, out of the rest positionand vertically through the stacked sludgecontainer.As soon as a turbid water layer is detected theunit pauses until the turbid water has beenpumped away through a flexible dischargepipe.After the tank has been scanned successfullyand the turbid water layers have beenremoved, the unit returns to the predefinedrest position.Turbid water limits, start times and cycles andother parameters can be determined usingthe hand-held panel or via the control room,depending on the version.


The heart of the device is a compact functionblock with integrated sensor system includ-ing cable routing. The submersible pump isfixed onto the underside of the block. Thisdesign solution forms a closed unit withoutthe usual approaches (e.g. float switch) forentanglement and entwining. A flexible discharge pipe carries the turbid water tothe outside. The cable of the lifting device isfixed to the top part of the function block.The cable made of stainless steel is routedvia the boom of a small crane to the winch.The cable winch is attached to a bracket atplatform level. Direct accessibility is thuspossible.The control system uses the reflection principle, thereby ensuring automatic detec-tion of all turbid water layers and their posi-tion in the tank. The whole tank fill is

recorded according to the predefined timeregime. The data recording enables optimi-sation of the time regime. Pumping opera-tion is activated and ended according to theset limit values for the turbid water.


A U T O M AT I C T U R B I D W AT E R R E M O V A L AW-ATAB-15

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Documents

wks AW-Produktkatalog 2017GB wks Produkt · brane surface through air flow (cross flow), chemical intermediate and intensive clean-ing with substances such as sodium hypochlorite