VEJLEBY Wastewater Treatment Plant, Frederikssund, Denmark

VEJLEBY is a wastewater treatment plant located in Frederikssund, Denmark, within Region Hovedstaden. The plant serves a population of 655 and has a designed capacity of 2,500 m³/day, with an average daily discharge of 406.87 m³/day. It operates under Denmark's implementation of the EU Urban Waste Water Treatment Directive, which requires advanced treatment for sensitive areas. The plant provides advanced treatment, ensuring high-quality effluent before discharge. As a small agglomeration serving fewer than 2,000 people, it meets the EU directive's standards for secondary treatment, with advanced treatment going beyond requirements to protect the local environment. The treated effluent is discharged into the local watershed, which drains into the Isefjord and ultimately the Kattegat sea. The coastal location means the plant's discharge affects marine ecosystems, including nutrient-sensitive areas that support diverse aquatic life and migratory species.

VEJLEBY discharges into the local watershed that flows into the Isefjord, a shallow fjord connected to the Kattegat sea. The coastal environment supports diverse marine life, including fish and bird populations. Advanced treatment helps reduce nutrient loading, protecting the fjord from eutrophication and maintaining water quality for recreational and ecological uses.