Weiding Wastewater Treatment Plant, Maiering, Bavaria, Germany

The Weiding wastewater treatment plant is located in Maiering, a district of the Weiding municipality in the Cham district of Bavaria, Germany. It serves a population equivalent of 1,610 and was designed with an advanced treatment level, reflecting Germany's stringent wastewater standards under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant had a designed capacity of 2,500 cubic meters per day and discharged an average volume of 407.45 m³/day before its closure. As an advanced treatment facility, Weiding employed processes beyond secondary treatment, likely including nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. Although the plant is now closed, its operational history aligns with German regulations that mandate tertiary treatment for agglomerations above 10,000 PE in sensitive areas, and advanced treatment for smaller plants where required by local water quality objectives. The plant's discharge ultimately drains into the Regen River, a tributary of the Danube, which flows into the Black Sea. The Regen River supports diverse aquatic life and is part of the Danube basin, a major European ecological corridor. The plant's advanced treatment helped minimize nutrient loading to this downstream system, contributing to the protection of the Black Sea from eutrophication.

The Weiding plant discharged into the Regen River, which flows into the Danube and eventually the Black Sea. This watershed is ecologically sensitive, supporting diverse fish populations and migratory bird species. Advanced treatment at the plant helped reduce nutrient pollution, mitigating eutrophication risks in downstream water bodies.