DIANALUND Wastewater Treatment Plant, Sorø, Region Sjælland, Denmark

DIANALUND is a wastewater treatment plant located in Sorø, Denmark, within Region Sjælland. The facility serves a population of approximately 3,812 people, placing it in the small agglomeration category under Danish and EU regulations. The plant is situated inland, more than 50 km from the coast, and its operations are part of Denmark's comprehensive wastewater management infrastructure. As a Danish facility, DIANALUND operates under the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires secondary treatment for agglomerations of this size. The regulatory framework ensures that discharges comply with national and EU water quality objectives. The treated effluent from DIANALUND is discharged into local watercourses that eventually drain into the Baltic Sea via the Øresund or the Great Belt. The plant plays a crucial role in protecting the region's freshwater ecosystems and downstream marine environments. By removing nutrients and pollutants, it helps prevent eutrophication in the Baltic Sea, a sensitive water body that faces significant environmental pressures from agricultural runoff and urban discharges.

DIANALUND discharges treated wastewater into local streams that flow into the Baltic Sea via the Øresund or the Great Belt. The Baltic Sea is a semi-enclosed brackish sea with limited water exchange, making it highly sensitive to nutrient pollution. The plant's treatment processes help reduce nitrogen and phosphorus loads, mitigating eutrophication and supporting the health of aquatic life in downstream rivers and coastal waters.