Kallmunz Wastewater Treatment Plant, Krachenhausen, Bavaria, Germany

The Kallmunz wastewater treatment plant is located in Krachenhausen, a locality within the municipality of Kallmünz in the Regensburg district of Bavaria, Germany. This facility serves a population of approximately 3,400 residents, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is situated inland, away from coastal areas, and its operations are integral to local water management. 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 3,000 cubic meters per day and reports an annual discharge volume of 441.12 thousand cubic meters, indicating operational efficiency. The treated effluent is discharged into a local watercourse that ultimately drains into the Danube River basin. The Danube flows southeast through several countries before reaching the Black Sea. The advanced treatment level helps safeguard the ecological health of the receiving waters, which support diverse aquatic life and are part of a major European watershed.

The plant discharges into a tributary of the Danube River basin, which flows through Bavaria and eventually into the Black Sea. The Danube is one of Europe's most important rivers, supporting rich biodiversity and providing water for millions. The advanced treatment at Kallmunz reduces nutrient loads, helping to prevent eutrophication in downstream lakes and the Black Sea. The local watershed includes sensitive habitats that benefit from reduced pollution.