AGERUP Wastewater Treatment Plant, Gundsølille, Denmark

AGERUP is a wastewater treatment plant located in Gundsølille, Roskilde Kommune, Region Sjælland, Denmark. It serves a population of approximately 2,017 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 employs advanced treatment processes, which go beyond the EU Urban Waste Water Treatment Directive's minimum requirement of secondary treatment for agglomerations of this size. With a designed capacity of 3,500 m³/day and a current discharge volume of 348 m³/day, the plant operates well below its capacity, indicating room for future growth or seasonal variations. The treated effluent is discharged into local water bodies that eventually drain into the Øresund, the strait between Denmark and Sweden. This coastal discharge requires careful management to protect the sensitive marine environment of the Baltic Sea, which supports diverse aquatic life and is an important ecological area.

The plant discharges into local streams that flow into Roskilde Fjord and ultimately the Øresund, a key waterway connecting the Baltic Sea to the North Sea. The coastal environment supports diverse aquatic life, including fish and bird species, and is ecologically sensitive to nutrient loading. Advanced treatment helps minimize eutrophication risks in the downstream marine ecosystem.