Gulzow Kollow Wastewater Treatment Plant, Gülzow, Schleswig-Holstein

The Gulzow Kollow wastewater treatment plant is located in Gülzow, a municipality in the district of Herzogtum Lauenburg, Schleswig-Holstein, Germany. It served a population of approximately 1,806 people and has since been closed. The plant was designed with a capacity of 3,000 cubic meters per day and treated wastewater to an advanced level. As an advanced treatment facility, Gulzow Kollow likely employed processes such as nutrient removal to meet stringent German and EU standards. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), plants serving agglomerations of this size are required to provide secondary treatment, but advanced treatment is often implemented in sensitive areas to protect water quality. The facility is located inland, more than 50 km from the coast, and its treated effluent likely flows into local streams or the Elbe River basin, ultimately reaching the North Sea.

The plant is situated in the Elbe River basin, which drains into the North Sea. The region's water bodies support diverse aquatic life and are important for migratory fish species. Advanced treatment helps minimize nutrient loading, protecting downstream ecosystems from eutrophication. The plant's closure may reduce local discharge, but regional water quality depends on remaining treatment facilities.