VORRA Wastewater Treatment Plant, Alfalter, Bayern, Germany

The VORRA wastewater treatment plant is located in Alfalter, a district of Vorra in the Landkreis Nürnberger Land, Bayern, Germany. It serves a population of approximately 1,700 people and is currently closed. The plant was designed with a capacity of 3,200 m³/day and had a discharge volume of 815.37 m³/day. As a secondary treatment facility, VORRA provided biological treatment to reduce organic matter and suspended solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations of this size (1,700 PE) are required to have appropriate collection systems and secondary treatment. The treated effluent from VORRA likely discharged into a local watercourse within the Pegnitz river basin, which flows through the Franconian Jura region. The Pegnitz eventually joins the Regnitz and then the Main, ultimately draining into the Rhine and the North Sea. The plant's operation helped protect the local aquatic environment from untreated sewage.

The VORRA plant is situated in the Pegnitz river basin, a tributary of the Regnitz and Main rivers, which flow into the Rhine and eventually the North Sea. The region is characterized by forested hills and small agricultural valleys. The plant's secondary treatment reduced organic pollution and suspended solids, protecting the downstream aquatic ecosystem, which supports diverse fish and invertebrate communities. The closure of the plant may have shifted treatment to a larger facility, potentially improving overall treatment efficiency in the area.