is an ecological holiday housing estate located at the Baltic Sea coast in the state Schleswig-Holstein. The village consists of 15 houses and a common house. In this demonstration project new ecological techniques concerning constructing materials, solar energy supply and wastewater treatment are tested.

Problems to solve:

A consequent separation of human urine and its reuse in agriculture will lead to a sustainable improvement of our conventional wastewater treatment.

Domestic wastewater consists of sewage water from toilets, kitchens and showers. Usually the entire wastewater is been collected together in the same sewer for treatment in a central plant. Due to dilution with rinsing water and sewer infiltration water an extraction of concentrated plant nutrients from urine (nitrogen, phosphor and potassium) is impossible.

Up to 80% of nitrogen and 50 % of phosphorus of raw wastewater can be eliminated by separating the urine. Consequently, the costly elimination of nitrogen would become unnecessary. As long as phosphate-free washing detergents are used this is also applicable to phosphorus elimination in treatment plants.

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