GISLINGE Wastewater Treatment Plant, Holbæk, Denmark

GISLINGE is a wastewater treatment plant located in Holbæk, Region Sjælland, Denmark. It serves a population of 1,464 and operates with advanced treatment, reflecting Denmark's stringent environmental standards for coastal discharges. The plant has a designed capacity of 5,170 m³/day and currently discharges 461.71 m³/day of treated wastewater. As an advanced treatment facility, it likely incorporates nutrient removal to protect sensitive coastal waters, in line with the EU Urban Waste Water Treatment Directive's requirements for discharges into sensitive areas. The treated effluent is discharged into the local watershed, which ultimately drains into the Isefjord and then the Kattegat Sea. This coastal region supports diverse marine life and is important for fisheries and recreation, making advanced treatment essential to minimize nutrient loading and protect water quality.

The plant discharges into the Isefjord, a shallow fjord connected to the Kattegat Sea. This coastal ecosystem supports diverse marine life, including fish nurseries and migratory birds. Advanced treatment helps reduce nutrient inputs that could otherwise contribute to eutrophication in the sensitive fjord environment.