Could urine source separation replace the conventional nutrient elimination on wastewater treatment plants? Divided in nine work packages, the Eawag cross-cutting project Novaquatis pursued this question and highlighted the potential advantages and difficulties of such an enterprise. In many rapidly growing cities, the NoMix technology offers a rapid defense against nutrients in coastal waters, without waiting for the long and tiresome construction of sewers and treatment plants. In order to avoid the urine transport, an important next step will be the rapid development of decentralized process engineering opportunities. Also in Switzerland, the NoMix technology has a future, especially in the case of growing requirements for water pollution control.