Gelsenkirchen Picksmuhlenbach Wastewater Treatment Plant, Gelsenkirchen, Germany

Gelsenkirchen Picksmuhlenbach is a municipal wastewater treatment plant located in the Gelsenkirchen-Nord district of Gelsenkirchen, Nordrhein-Westfalen, Germany. Serving a population of approximately 53,859, the plant is part of the region's critical water infrastructure, treating domestic and industrial wastewater from the surrounding urban area. As a medium-sized agglomeration under the EU Urban Waste Water Treatment Directive (91/271/EEC), the plant is required to provide at least secondary treatment. The directive mandates that agglomerations with a population equivalent (PE) between 10,000 and 150,000 must meet specific effluent quality standards. The plant's operations are subject to German water management regulations, which implement the directive through the Federal Water Act (Wasserhaushaltsgesetz) and state-level ordinances. The treated effluent is discharged into the local water system, ultimately draining into the Rhine River basin via the Emscher River, a tributary of the Rhine. The Emscher system has undergone extensive ecological restoration in recent decades, making the plant's treatment performance vital for protecting downstream aquatic habitats and supporting biodiversity in the Rhine delta.

The plant discharges into the Emscher River, a major tributary of the Rhine River, which flows through the Ruhr region and eventually into the North Sea. The Emscher catchment has been heavily industrialized, but recent restoration projects aim to improve water quality and ecological function. The plant's treated effluent must meet stringent standards to prevent eutrophication and protect sensitive aquatic species in the Rhine basin, which supports diverse fish populations and migratory birds.