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Passavant CarbonExtract for primary sludge extraction

The process of Passavant CarbonExtract® is an essential step towards energy efficient wastewater treatment. It is based on our Noggerath® drum screen RSH-MG, the fine screening of raw wastewater enables a separation of solids.


The core of the process is our Noggerath® drum screenRSH-MG it almost completely sieves off impurities such as hair, fibres, oil, grease and other organic contaminants. This relieves following cleaning processes and improves operational safety of sewage treatment plants. 
The process has proven itself as a pretreatment unit for membrane filtration, conventional activated sludge plants or biofilm processes. An optional, integrated dewatering system for the screenings and innovative cleaning of the mesh furthermore make the system very compact and maintenance-friendly.

Passavant® CarbonExtract® with Noggerath® drum screen RSH-MG is an attractive alternative to conventional preclarification, not only because of its significantly smaller dimensions. An optional flocculation unit enables a considerably increased extraction of the carbon. The highly organic screenings can be used in an anaerobic sludge stabilisation (Digestion) to produce biogas or by combustion/gasification technologies.

In conclusion, the process is an optimal support in the conversion to anaerobic sludge stabilization, which focuses on the reduction of aeration energy and offers the possibility to energetically use biogas to reduce the energy costs of a wastewater treatment plant.

Fields of Application

  • Space-saving upgrade of existing wastewater treatment plants
  • Simple and effective capacity increase of overloaded wastewater Treatment plants
  • Contribution aid to become an energy-optimized sewage treatment plants
  • Replacement of a conventional primary clarifier
  • Pre-stage and safety barrier for subsequent sensitive processes such as membrane bioreactors

Click here to learn more on the functionality of the drum screen and contact us for more information:

Locations and Contact


Aqseptence Group Carpi Srl, Limidi

Sales and Manufacturing Location
Via Pitagora 30
41010 Limidi Di Soliera, MO

Tel: +39 059 525720

Fax: +39 059 525443



Aqseptence Group SAS, Availles-en-Chatellerault

Sales and Manufacturing Location
Zone Industrielle
86530 Availles-en-Châtellerault

Tel: +33 5 4902 1600

Fax: +33 5 4902 1616



Aqseptence Group GmbH, Bückeburg

Sales Location
Ziegeleiweg 2
31675 Bückeburg

Tel: +49 5722 882 0

Fax: +49 5722 882 282



Aqseptence Group GmbH, Aarbergen

Sales and Manufacturing Location
Passavant-Geiger-Strasse 1
65326 Aarbergen

Tel: +49 6120 280

Fax: +49 6120 28 2182


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