Ruderting Wastewater Treatment Plant, Fischhaus, Bayern, Germany

Ruderting wastewater treatment plant is located in Fischhaus, a locality within the municipality of Ruderting in Landkreis Passau, Bayern, Germany. The plant serves a population of approximately 2,186 and is part of the region's municipal wastewater infrastructure. It operates under Germany's implementation of the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets standards for treatment based on agglomeration size and receiving water sensitivity. The plant employs advanced treatment processes, which go beyond the secondary treatment required by the EU directive for smaller agglomerations. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant has a designed capacity of 5,000 cubic meters per day, with an actual discharge volume of 586.58 cubic meters per day, indicating ample capacity for current loads. Treated effluent from the plant is discharged into local streams that eventually flow into the Danube River via the Ilz or other tributaries. The Danube is a major European waterway that drains into the Black Sea. The advanced treatment helps protect the ecological health of these water bodies, supporting aquatic life and water quality downstream.

The plant discharges into small watercourses in the Danube basin, which ultimately drain into the Black Sea. The region is characterized by forested hills and agricultural land, with the Danube River supporting diverse fish species and migratory birds. Advanced treatment reduces nutrient loading, helping to prevent eutrophication in downstream lakes and the Danube Delta ecosystem.