Karlsburg Wastewater Treatment Plant, Mecklenburg-Vorpommern, Germany

The Karlsburg wastewater treatment plant is located in the town of Karlsburg, in the Vorpommern-Greifswald district of Mecklenburg-Vorpommern, Germany. It serves a population of approximately 4,551 people, classifying it as a small agglomeration under EU regulations. The plant employs advanced treatment processes, which go beyond the EU Urban Waste Water Treatment Directive's minimum requirement of secondary treatment for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive water bodies. The plant has a designed capacity of 3,500 m³/day and currently discharges 479.26 m³/day of treated wastewater. The treated effluent is released into local streams that drain into the Peene River, which flows into the Peenestrom and eventually the Baltic Sea. This region includes ecologically sensitive areas such as the Peene Valley, a lowland river landscape that supports diverse aquatic life and migratory birds. The advanced treatment helps minimize nutrient loading to the Baltic Sea, which is vulnerable to eutrophication.

The plant's discharge enters small watercourses that flow into the Peene River, a major river in northeastern Germany. The Peene River meanders through the Peene Valley, a broad lowland area with extensive wetlands and floodplains, before reaching the Peenestrom, a strait of the Baltic Sea. This coastal ecosystem is sensitive to nutrient pollution, and the plant's advanced treatment helps protect water quality in the Baltic Sea, which faces eutrophication challenges from agricultural and urban runoff.