Rennertshofen Wastewater Treatment Plant, Hatzenhofen, Bavaria

The Rennertshofen wastewater treatment plant is located in Hatzenhofen, a district of Rennertshofen in Bavaria, Germany. This facility serves a population of approximately 3,483 residents, operating as a secondary treatment plant under German and EU regulations. As a secondary treatment plant, Rennertshofen employs biological treatment processes to reduce organic matter and suspended solids. The plant has a designed capacity of 4,999 cubic meters per day and currently treats an average daily flow of 813.26 cubic meters. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations between 2,000 and 10,000 population equivalents are required to provide secondary treatment, which this facility meets. The treated effluent from Rennertshofen is discharged into local waterways that ultimately drain into the Danube River basin. The Danube flows eastward through several countries before reaching the Black Sea, making this plant part of a vast international watershed. Proper treatment helps protect downstream aquatic ecosystems and water quality in the Danube River system.

The Rennertshofen plant discharges into local streams that flow into the Danube River, which traverses Central and Eastern Europe before emptying into the Black Sea. This watershed supports diverse aquatic life and provides drinking water for millions. The plant's secondary treatment reduces nutrient and organic pollutant loads, helping to prevent eutrophication in downstream water bodies and maintain ecological balance in the Danube basin.