KA Gnarrenburg - Advanced Wastewater Treatment Plant in Gnarrenburg, Niedersachsen

KA Gnarrenburg is an advanced wastewater treatment plant located in Gnarrenburg, in the district of Rotenburg (Wümme), Niedersachsen, Germany. The plant serves a population equivalent of 9,813 and has a designed capacity of 13,000 m³ per day, with an average discharge volume of 912.46 m³ per day. As an advanced treatment facility, KA Gnarrenburg provides tertiary-level treatment, which includes nutrient removal and disinfection. This level of treatment is typical for plants in Germany operating under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for sensitive areas and agglomerations of this scale. The treated effluent is discharged into local watercourses that drain into the Wümme River, a tributary of the Weser River, which ultimately flows into the North Sea. The plant plays a crucial role in protecting the water quality of the Wümme and Weser basins, supporting aquatic ecosystems and downstream water uses.

The plant discharges into the Wümme River catchment, which flows into the Weser River and then to the North Sea. This region is part of the Weser basin, an ecologically important area supporting diverse aquatic life, including migratory fish species. The advanced treatment ensures minimal nutrient loading, protecting downstream waters from eutrophication.