a The urban water cycle in a centralized system A typical single system of today. A possible dual system in future A mixture of useful C, P, N)and Biological cycle kept apart from harmful constituents(Me, Aox) the technical cycle The biological cycle The technical cycle The biological cycle The technical cycle 学目 Agriculture Stormwater zmmwvatet water NINU- Norwegian University of Science and Technology Prof Hallvard Odegaard Dep Hydraulic and Environmental EngineeringNTNU - Norwegian University of Science and Technology Dep. Hydraulic and Environmental Engineering Prof. Hallvard Ødegaard The urban water cycle in a centralized system A typical single system of today. A mixture of useful (C,P,N) and harmful constituents (Me, AOX) A possible dual system in future Biological cycle kept apart from the technical cycle