Scientific objectives and approach: To reach the above stated objectives and frame conditions, the following three step treatment of the generated dock waste water is suggested: - a new specific polyphase separator - a new high active knitted carbon membrane technology - a new low energy desalination system Through a polyphase flow simulation, it is anticipated to optimise the lamella and reactor geometry and design in a way to use and optimise flow-, gravity- and coalescence effects for the simultaneous separation of particulates and oils over wide operational conditions. The objective of this computer-aided optimisation is the reduction of the unit's size by at least 30% compared to traditional systems and an optimisation of the separation of particulates and oils by at least 25%, which would lead to an extremely economic system. Another objective is to realise the separation of particulates of an particulate diameter of less than 5 m. The activated carbon membrane unit (geometry, size) will be designed based on lab-adsorption tests. The membrane unit shall have a reduced reactor size of at least 50% and an improved adsorption material utilisation of at least 30%. To prevent that salt will be enriched in the closed water loop, the desalination cell based on electrolysis is developed. Different electrode designs will be investigated with varying salt concentrations during lab tests to ensure highest separation efficiencies at lowest energy requirements. The pure mechanical treatment of PIWAMAS has the advantage of not employing chemical additives or energy intensive procedures. The different waste water compositions will be produced with a waste water simulation breadboard. For simplifying testing in different areas, the prototype PIWAMAS system will be build into a small container allowing it to be easily transported and tested after the experimental test phase at the End-Users site's.