HOLEBY Wastewater Treatment Plant, Holeby, Denmark

HOLEBY is a former wastewater treatment plant located at 3, Kirkevej in Holeby, Lolland Kommune, Region Sjælland, Denmark. The plant was designed with a capacity of 2776 cubic meters per day and provided advanced treatment, reflecting Denmark's stringent environmental standards for wastewater management. Although the plant is now closed, its design capacity and advanced treatment level indicate it was built to meet high effluent quality requirements. Under Danish regulations, which implement the EU Urban Waste Water Treatment Directive, advanced treatment is typically required for sensitive areas or larger agglomerations to protect receiving waters. The plant's location within 10 km of the coast means its treated effluent would have discharged into the Baltic Sea catchment, likely via local streams or drainage channels. This coastal proximity underscores the importance of nutrient removal to prevent eutrophication in the sensitive Baltic Sea environment.

The plant is situated on the island of Lolland, within the Baltic Sea basin. Treated wastewater would have flowed through local watercourses into the Baltic Sea, a semi-enclosed sea highly sensitive to nutrient pollution. The region supports diverse aquatic life and is an important area for migratory birds. Advanced treatment at this plant would have helped reduce nitrogen and phosphorus loads, mitigating eutrophication risks in coastal waters.