ZV Fellen Aura Sitz Fellen Wastewater Treatment Plant, Fellen, Bavaria

ZV Fellen Aura Sitz Fellen is a municipal wastewater treatment plant located in Fellen, a municipality in the Main-Spessart district of Bavaria, Germany. The plant serves a population of approximately 2,150 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant provides secondary treatment, which is the standard required by the EU UWWTD for freshwater discharges from agglomerations of this size. With a design capacity of 4,000 m³/day and an average daily discharge volume of 544 m³, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local watercourses that ultimately drain into the Main River, 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 secondary treatment helps protect downstream water quality in this sensitive river system.

The plant discharges into local streams that flow into the Main River, which joins the Rhine near Mainz. The Rhine is one of Europe's most important waterways, supporting diverse fish populations and serving as a migratory corridor for species such as salmon. The plant's secondary treatment reduces organic load and suspended solids, helping to maintain the ecological health of the Main-Rhine system.