Wulfrath Dussel Wastewater Treatment Plant, Wülfrath, Germany

Wulfrath Dussel is an advanced wastewater treatment plant located in Wülfrath, within the district of Mettmann in Nordrhein-Westfalen, Germany. The plant serves a population of around 3,281 and has a designed capacity of 4,000 cubic meters per day, with a current discharge volume of 792 cubic meters per day. As an advanced treatment facility, Wulfrath Dussel goes beyond secondary treatment to remove nutrients such as nitrogen and phosphorus, which is typical for plants in sensitive catchment areas under the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size (under 10,000 population equivalent), the directive requires appropriate treatment, and Germany's national regulations often mandate advanced treatment to protect water quality. The plant discharges treated effluent into the local water system, which ultimately drains into the Rhine River basin. The Rhine is a major European waterway that flows through Germany and the Netherlands into the North Sea. The advanced treatment helps reduce nutrient loads that could contribute to eutrophication in downstream water bodies, including the North Sea.

The plant's treated effluent enters the local Düssel stream, a tributary of the Rhine River. The Rhine flows through Germany and the Netherlands before discharging into the North Sea. The North Sea is an ecologically sensitive marine environment that supports diverse aquatic life and important fisheries. Advanced nutrient removal at Wulfrath Dussel helps mitigate eutrophication risks in the Rhine and North Sea.