VISKINGE Wastewater Treatment Plant, Kalundborg, Denmark

VISKINGE is a municipal wastewater treatment plant located in Kalundborg, Region Sjælland, Denmark. It serves a population of approximately 2,202 people, classifying it as a small agglomeration under Danish and EU regulations. The plant is situated near the coast, reflecting the region's coastal geography. The plant provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for discharges into coastal waters. It has a designed capacity of 4,000 m³/day and currently treats an average daily flow of 772.69 m³/day, indicating significant spare capacity. The plant operates under Denmark's implementation of the EU directive, which mandates secondary treatment for all agglomerations above 2,000 population equivalent discharging into coastal areas. Treated effluent from VISKINGE is discharged into the local watershed, which ultimately drains into the Kattegat or the Baltic Sea via the Great Belt. The coastal environment supports diverse marine life, including fish spawning grounds and migratory bird habitats. The plant's proximity to the coast underscores the importance of effective nutrient removal to prevent eutrophication in sensitive marine waters.

VISKINGE plant discharges into the coastal waters of the Great Belt, a strait connecting the Kattegat and the Baltic Sea. This area is ecologically sensitive, supporting diverse marine species and serving as a migratory corridor for fish and birds. The Baltic Sea is particularly vulnerable to nutrient pollution, making secondary treatment with potential nutrient removal critical for protecting water quality and preventing algal blooms.