Dachwig Wastewater Treatment Plant, Thüringen, Germany

The Dachwig wastewater treatment plant is located in the town of Dachwig, within the Landkreis Gotha district of Thüringen, Germany. It served a population of approximately 3,595 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive (UWWTD). The plant is now closed, but during operation it provided advanced treatment, which goes beyond the secondary treatment standard required by the UWWTD for sensitive areas. As a German facility, Dachwig operated under the national Wasserhaushaltsgesetz (WHG) and Abwasserverordnung (AbwV), which implement the EU UWWTD. For small agglomerations like this, the directive typically requires appropriate treatment, and the advanced level here indicates a higher standard, possibly due to local environmental sensitivity. The plant's designed capacity was 4,999 m³/day, with an actual discharge volume of 909.81 m³/day. The treated effluent from Dachwig would have been discharged into a local watercourse within the Elbe River basin, which ultimately drains into the North Sea. The plant's advanced treatment helped protect downstream aquatic ecosystems by reducing nutrient loads and other pollutants, supporting water quality in the region's rivers and streams.

Dachwig lies in the Thüringen region, within the Elbe River basin. The treated wastewater would have entered a small tributary of the Unstrut River, which flows into the Saale and then the Elbe before reaching the North Sea. The area supports diverse aquatic life, and advanced treatment helps minimize eutrophication risks in downstream waters, including the Elbe estuary.