Kalchreuth Wastewater Treatment Plant, Käswasser, Bayern, Germany

The Kalchreuth wastewater treatment plant is located in the Käswasser district of Kalchreuth, in the Landkreis Erlangen-Höchstadt, Bayern, Germany. It served a population of 2,167 people and is now closed. The plant was designed with a capacity of 4,100 cubic meters per day and treated a discharge volume of 548.42 cubic meters per day. As a secondary treatment facility, the plant provided biological treatment to remove organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size (under 10,000 population equivalent) are typically required to have appropriate treatment, which secondary treatment fulfills. The plant discharged treated wastewater into local water bodies within the Regnitz river basin, which flows into the Main River and ultimately the Rhine River. The surrounding area is characterized by mixed urban and agricultural land use, and the plant's operation contributed to protecting local streams and groundwater quality.

The plant discharged into the Regnitz river system, part of the Rhine basin, which flows through Bayern and into the North Sea. The local watershed supports diverse aquatic life and is used for recreation and agriculture. Proper treatment was essential to prevent nutrient pollution and maintain water quality in this ecologically sensitive region.