Kolitzheim OT Unterspiesheim Wastewater Treatment Plant, Gernach, Bayern

Kolitzheim OT Unterspiesheim is a wastewater treatment plant located in Gernach, within the municipality of Kolitzheim in the Landkreis Schweinfurt district of Bayern, Germany. The plant serves a population of approximately 1,584 people, classifying it as a small agglomeration under German and EU regulations. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The designed capacity is 2,500 m³/day, with an actual discharge volume of 400.87 m³/day, indicating operational headroom. The plant is currently closed, though it remains part of the regional wastewater infrastructure. Treated effluent from the plant discharges into local water bodies that ultimately drain into the Main River system, a major tributary of the Rhine. The Rhine basin supports diverse aquatic ecosystems and is a critical water resource for the region. The plant's operations help protect downstream water quality in this ecologically significant watershed.

The plant discharges into local streams that feed into the Main River, a major tributary of the Rhine. The Rhine basin is a vital ecological corridor supporting diverse fish species, migratory birds, and aquatic plants. The region's agricultural and urban areas rely on maintaining good water quality, making the plant's secondary treatment essential for reducing nutrient and organic loads before discharge.