Salzkotten Hengelsberg Wastewater Treatment Plant | Salzkotten, Germany

Salzkotten Hengelsberg is an advanced wastewater treatment plant located in the Niederntudorf district of Salzkotten, in the Kreis Paderborn region of Nordrhein-Westfalen, Germany. The plant serves a population of around 4,500 residents and has a designed capacity of 5,000 cubic meters per day, with an actual discharge volume of 912 cubic meters per day. As an advanced treatment facility, it 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). Germany implements this directive through national legislation, requiring tertiary treatment for agglomerations above 10,000 population equivalents in sensitive areas, though smaller plants like this one may also adopt advanced treatment to protect local water quality. The plant discharges treated effluent into the local water system, which ultimately drains into the Lippe River and then the Rhine River, flowing into the North Sea. The Lippe basin supports diverse aquatic life and is an important ecological corridor in the region. Advanced treatment helps minimize nutrient loading and protects downstream ecosystems.

The plant's treated effluent enters local watercourses that flow into the Lippe River, a tributary of the Rhine. The Rhine basin is one of Europe's most important river systems, supporting diverse aquatic habitats and providing drinking water for millions. Advanced treatment at this plant reduces nutrient and pollutant loads, helping to maintain water quality in the Lippe and Rhine rivers and ultimately the North Sea.