Mollhagen Kahlenredder Wastewater Treatment Plant, Steinburg, Germany

Mollhagen Kahlenredder is an advanced wastewater treatment plant located in Steinburg, within the district of Stormarn in Schleswig-Holstein, Germany. The plant serves a population of 2,313 and is part of the region's municipal wastewater infrastructure. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 3,700 cubic meters per day and a current discharge volume of 284.91 cubic meters, the facility operates well within its capacity. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, and Mollhagen Kahlenredder exceeds this standard with its advanced treatment level. The treated effluent is discharged into local water bodies that drain into the Baltic Sea via the Trave River system. The plant plays a key role in protecting the region's water quality, supporting aquatic life, and preventing eutrophication in downstream coastal environments.

The plant discharges into local streams that flow into the Trave River, which ultimately reaches the Baltic Sea. The Baltic Sea is a semi-enclosed, brackish sea sensitive to nutrient pollution, making advanced treatment crucial for reducing nitrogen and phosphorus loads. The surrounding watershed includes agricultural and forested areas, and the plant helps maintain ecological balance in these water bodies.