Brightwork initiated the development of a new waste water treatment scheme BioTRAP, based upon biofilm technology. Pilot research has been executed at the demosite of Wetterskip Fryslan, treating municipal waste water. BioTRAP is now implemented at a potato processing company to treat the waste water. Advantages of the technology are the compactness and a reduction of operational costs. The research program has been financially supported by the Ministery of Economic Affairs, Pieken in de Delta and the province of Fryslân.