VOLDUM Wastewater Treatment Plant, Voldum, Region Midtjylland, Denmark

VOLDUM is a wastewater treatment plant located in Voldum, a town in Favrskov Municipality, Region Midtjylland, Denmark. The plant serves a population of 659, placing it in the small agglomeration category under Danish and EU regulations. The plant employs advanced treatment, which goes beyond the EU Urban Waste Water Treatment Directive's minimum secondary treatment requirement for small agglomerations. Advanced treatment typically includes nutrient removal, reducing nitrogen and phosphorus loads to protect sensitive water bodies. The plant's designed capacity is 2,540 m³/day, with an actual discharge volume of 282.67 m³/day, indicating ample reserve capacity. The treated effluent is discharged into local watercourses that eventually drain into the Kattegat, a sea area between Denmark and Sweden. The plant's advanced treatment helps protect the downstream aquatic environment, including the Kattegat's marine ecosystems, from eutrophication and other pollution impacts.

The plant discharges into local streams that flow into the Kattegat, a semi-enclosed sea area connecting the Baltic Sea to the North Sea. The Kattegat supports diverse marine life, including fish, seabirds, and benthic communities, and is an important migratory corridor. Advanced treatment at VOLDUM reduces nutrient loads, helping to mitigate eutrophication risks in these coastal waters.