Biological Treatment

Biological Treatment Of Wastewater By Anaerobic Or Aerobic Processes


Wastewater can be treated anaerobically (ANAMET) followed by an activated sludge stage, or by a biofilm aerobic method alone or in combination with an activated sludge stage.



Local conditions – sludge disposal costs and potential utilization of biogas – together with the organic load determine the choice between anaerobic and biofilm aerobic treatment.



Biofilm technology means that the biomass - micro-organisms - grows as a film on a surface in contact with liquid. The best technical solution proved to be use of mobile carriers in the form of small plastic elements, free-floating in liquid and with a large specific surface. The process, which requires minimal space, is today a proved and well-documented method with about 100 reference installations in the pulp and paper industry.



The suspended carrier biofilm process offers many benefits compared with traditional biological treatment:



  • Increased treatment capacity in existing plants
  • Flexible design adaptable to existing basin volumes
  • Less sensitivity to load increases and toxic discharges
  • A more stable treatment process
  • Unaffected by sludge age


Other Products

Industrial Waste Water Treatment

Dissolved Air Flotation

Recycled Paper Production

Roto-SieveT Drum Screen