Silberstedt Wastewater Treatment Plant | Schleswig-Holstein, Germany

The Silberstedt wastewater treatment plant is located in the municipality of Silberstedt, within the Schleswig-Flensburg district of Schleswig-Holstein, Germany. It serves a population of approximately 3,412 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, more than 10 km from the coast, and operates under German water quality regulations. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU UWWTD for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The facility has a designed capacity of 7,582 m³/day and currently discharges an average of 514.14 m³/day of treated wastewater, indicating significant reserve capacity. The treated effluent is discharged into local watercourses that drain into the Treene River, a tributary of the Eider River, which flows into the North Sea. The plant's advanced treatment helps safeguard the ecological health of these rivers and the downstream marine environment, supporting aquatic biodiversity and water quality standards.

The Silberstedt plant discharges into small streams that feed the Treene River, part of the Eider River basin. The Eider flows into the North Sea, a sensitive marine ecosystem. Advanced treatment at the plant reduces nutrient loads, helping to prevent eutrophication in downstream waters and supporting the ecological balance of the region's waterways.