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Excessive amount of clean water to WWTP

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Inefficient operation waste water treatment plant

The operations of the WWTP can be more efficient.

In the current improved separated sewage system, two thirds of the run-off precipitation is discharged to the WWTP. Sometimes this also is with a multitude of sewage-free water, such as groundwater. This is detrimental to the efficiency and total nutrient emission of the WWTP.


Improved separated sewage system 2.0

With improved seperated sewage system (VGS) 2.0, only dirty water is discharged to the WWTP and the relatively clean rainwater is used locally in the water system. This ensures a large decrease in the supply of clean water to the WWTP, which reduces purification costs, among other things.

VGS 2.0


  • Overcomes faulty connections.
  • Smaller mills, pressure pipes and WWTPs needed.
  • More clean water available locally.
  • Better performance of WWTPs.


  1. Topic Urban water
  2. Development state 6: System/subsystem model or prototype demonstration in a relevant environment
  3. Setting type Urban area
  4. Water type Rainwater, Groundwater, Waste water, Surface water
  5. Project period 0-3 months

Submitted innovation Award

Water Innovation Award