Operating results of our prototype on a WWTP in western Germany

In September 2007 the first hydrograv adapt inlet in a secondary clarifier went into operation in a WWTP in North Rhine-Westphalia. The second SST of this plant is equipped with a conventional inlet construction that complied with the former state-of-the-art. This calls for a comparison of the operating results of both tanks.

The tank that is equipped with hydrograv adapt shows consistently better results:
 

• considerably lower sludge blanket level, especially at stormwater; that means greater security regarding sludge overflow and - as predicted - a higher hydraulic capacity, respectively,
• less suspended solids and considerably fewer visible particles in the effluent,
• higher visible depth (i.e. more transparent water),
• considerably decreased formation of floating scum.

 









With hydrograv adapt the effluent quality is improved compared to the already good results of the conventionally equipped tank.