Return water treatment


The sludge dewatering centrate has a very high nitrogen concentration. With the return water treatment this load is being reduced in such way that the waste water can be treated in the biological stage.

SBR-processes are conventionally run with nitrification/denitrification or with partial nitrification and anaerobic ammonium oxidation (PNAA).

List of references




We adopt processes according to your project requirements and achieve optimal solutions using selected products from proven suppliers.

One of our partners for return water treatment:

For example:

  • rlb_werdhoelzli
Return water treatment

  • rlb_cham
Return water treatment

  • beluefter_2

  • ruehrwerk_2

  • beschickungspumpwerk
Feeding pump station

  • geblaesestation_2
Blower station

  • schaumbekaempfung
Foam control

  • klarwasserabzug
Clear water removal

Selected reference plants

ARA Werdhölzli RLB 

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