Lerkils avloppsreningsverk - Advanced Wastewater Treatment in Lerkil, Sweden

Lerkils avloppsreningsverk is an advanced wastewater treatment plant located in Lerkil, Kungsbacka kommun, Hallands län, Sweden. The plant serves a population of 5,296 and is situated near the coast, reflecting the region's coastal settlement pattern. 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. With a designed capacity of 10,000 m³/day and an actual discharge volume of 831.37 m³/day, the plant operates well below its capacity, indicating room for future growth. The treated effluent is discharged into the local watershed, which ultimately drains into the Kattegat, a part of the North Sea. The plant's advanced treatment helps protect the sensitive coastal and marine environment of the Kattegat, supporting biodiversity and water quality in the region.

The plant discharges into the local watershed that flows into the Kattegat, a shallow sea area between Sweden and Denmark. The Kattegat is ecologically sensitive, supporting diverse marine life including fish, seabirds, and benthic habitats. Advanced treatment at the plant helps reduce nutrient loads, mitigating eutrophication risks in this coastal environment.