Grossenaspe Wastewater Treatment Plant, Großenaspe, Schleswig-Holstein

The Grossenaspe wastewater treatment plant is located in Großenaspe, a municipality in the Amt Bad Bramstedt-Land of Kreis Segeberg, Schleswig-Holstein, Germany. The plant serves a population of 2,353 and operates under the regulatory framework of the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard requirement under the EU directive for inland agglomerations of this size. It has a design capacity of 2,600 m³/day and currently treats an average daily flow of 740 m³/day, indicating ample reserve capacity. The treated effluent is discharged into local watercourses that ultimately drain into the North Sea via the Elbe River basin. The plant plays a key role in protecting the region's surface waters from organic pollution and nutrient loading, supporting aquatic life in the downstream environment.

The plant discharges into small streams that feed into the Stör river, a tributary of the Elbe, which flows into the North Sea. The downstream environment includes ecologically sensitive areas such as the Elbe estuary, which supports diverse fish and bird populations. The plant's secondary treatment helps reduce biochemical oxygen demand and suspended solids, mitigating eutrophication risks in the North Sea.