LYNGE Wastewater Treatment Plant, Lillerød, Denmark

LYNGE is a wastewater treatment plant located in Lillerød, within the Allerød Municipality of Region Hovedstaden, Denmark. It serves a population of approximately 3,469 people, classifying it as a small agglomeration under EU classification. The plant is situated inland, more than 10 km from the coast, and operates within Denmark's comprehensive wastewater management framework. The plant provides advanced treatment, which goes beyond the secondary treatment required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 7,340 m³/day, with an actual discharge volume of 890.78 m³/day, indicating significant spare capacity. Advanced treatment typically includes nutrient removal to protect sensitive receiving waters. The treated effluent is discharged into local watercourses that drain into the Øresund strait, a marine body connecting the Baltic Sea to the North Sea. This region supports diverse aquatic life and is an important ecological corridor. The plant's advanced treatment helps minimize nutrient loading and protect downstream marine environments.

The plant discharges into local streams that flow into the Øresund strait, a narrow marine passage between Denmark and Sweden connecting the Baltic Sea to the North Sea. The Øresund supports diverse marine life, including fish, seabirds, and benthic communities, and is an important migratory corridor. Advanced treatment at LYNGE reduces nutrient inputs, helping to prevent eutrophication in the sensitive Baltic Sea ecosystem.