text: The adsorption/bio-oxidation process was applied at the Krefeld plant (800 000 P.E.) in 1985 for the first time. The plant was expanded and modified and currently treats municipal and industrial wastewater of 1 200 000 P.E.
  Currently adsorption/bio-oxidation process is applied at the municipal treatment plants in Germany, the Netherlands (WWTP Dokhaven (Rotterdam), WWTP Utrecht, WWTP Garmerwolde (Groningen) etc.), Austria (WWTP Salzburg, WWTP Strass etc.), Spain, US, China etc.
  Adsorption/bio-oxidation process is a part of innovative wastewater treatment concept WaterSchoon, realized in the Netherlands. 250 apartments in the new district Noorderhoek (Sneek, the Netherlands) are equipped with separate collection systems for toilet wastewater and the rest of the household wastewater (or so-called greywater). Both streams are treated separately in order to maximize recovery of resources from wastewater. Adsorption/bio-oxidation process is used for grey water treatment to increase sludge production. Sludge, produced in both stages of the process, is digested together with toilet wastewater in the UASB reactor to maximize energy recovery.