KA Niederopritz Wastewater Treatment Plant, Grünau, Saxony

KA Niederopritz is a municipal wastewater treatment plant located in Grünau, a district of Langenweißbach in the Zwickau district of Saxony, Germany. The plant serves a population of approximately 3,883 and is designed to handle a capacity of 9,000 m³ per day, with an actual discharge volume of 655.05 m³ per day. The plant employs advanced treatment processes, which go beyond secondary treatment to remove nutrients and other pollutants. As a German facility, it operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment for discharges into sensitive areas. For a plant of this scale, the directive mandates at least secondary treatment, and the advanced level indicates compliance with stricter standards. The treated effluent is discharged into local water bodies that ultimately drain into the Elbe River basin, which flows into the North Sea. The plant plays a key role in protecting the local watershed and downstream ecosystems from nutrient pollution and other contaminants.

The plant discharges into small streams in the Zwickau region, which are part of the Mulde River catchment, a tributary of the Elbe River. The Elbe flows through Germany and the Netherlands before reaching the North Sea. The local watershed supports diverse aquatic life and is important for migratory fish species. Advanced treatment helps reduce nutrient loads that could cause eutrophication in downstream waters.