Biessenhofen Wastewater Treatment Plant, Hörmanshofen, Bavaria

The Biessenhofen wastewater treatment plant is located in Hörmanshofen, a district of Biessenhofen in the Ostallgäu district of Bavaria, Germany. The plant serves a population of approximately 3,800 and operates under the regulatory framework of the German water management laws, which implement the EU Urban Waste Water Treatment Directive (91/271/EEC). As a secondary treatment facility, it provides biological treatment to reduce organic matter and suspended solids before discharge. The plant has a designed capacity of 7,000 m³/day and currently treats an average daily flow of 963.46 m³/day, indicating significant spare capacity. The treatment process involves secondary treatment, which is the standard requirement under the EU directive for agglomerations of this size. The plant is operated as part of the municipal wastewater infrastructure for the Biessenhofen area. The treated effluent is discharged into local water bodies that eventually drain into the Danube River basin, as the region is part of the Danube watershed. The plant plays a key role in protecting the water quality of local streams and the downstream environment, supporting aquatic life and preventing eutrophication in receiving waters.

The plant discharges into local streams that flow into the Wertach River, a tributary of the Lech River, which ultimately joins the Danube River. The Danube flows into the Black Sea, making this plant part of a large international river basin. The region is characterized by alpine foothills and sensitive aquatic ecosystems that benefit from the plant's secondary treatment, which reduces nutrient loads and protects downstream biodiversity.