IFAS sys­tems in waste water technology 

An IFAS process (Inte­grat­ed Fixed Film Acti­vat­ed Sludge) com­bines the advan­tages of con­ven­tion­al acti­vat­ed sludge with those of biofilm sys­tems by com­bin­ing the two tech­nolo­gies in a sin­gle reac­tor. In an IFAS sys­tem, syn­thet­ic media are used in the acti­vat­ed sludge tank as growth area for addi­tion­al bio­mass. This com­bi­na­tion allows a much high­er bio­mass con­cen­tra­tion and sludge age com­pared to con­ven­tion­al acti­vat­ed sludge processes.

The sol­id bio­mass also helps to improve the resis­tance of the sys­tem to organ­ic or hydraulic shock loads. Our IFAS tech­nol­o­gy has been inte­grat­ed into munic­i­pal and indus­tri­al waste­water treat­ment plants to mod­ern­ize exist­ing sys­tems (improv­ing treat­ment capac­i­ty and waste­water qual­i­ty) and reduce the space require­ments of new plants (by opti­miz­ing the aer­a­tion tank vol­ume). With the IFAS process, an increase in treat­ment capac­i­ty of up to 100 per­cent can be achieved with­out con­struc­tion work.


The process with Cleart­ec® Biotextil 

  1. Cleart­ec® Biotextile
  2. Biofilm
  3. flex­i­bil­i­ty
  4. Removal of surplus


or com­plete­ly min­er­alised biomass

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