Kallby avloppsreningsverk - Lund, Sweden Wastewater Treatment Plant

Kallby avloppsreningsverk is the municipal wastewater treatment plant serving Lund, a city in Skåne County, southern Sweden. The facility handles wastewater from a population of around 117,000, placing it in the large agglomeration category under EU regulations. Its location near the Höjeå river and proximity to the Öresund Strait influence its operational and environmental context. As a plant serving over 100,000 people, it is subject to the EU Urban Waste Water Treatment Directive (91/271/EEC), which requires advanced treatment (nutrient removal) for discharges into sensitive areas. Sweden has designated many of its coastal and inland waters as sensitive, necessitating tertiary treatment to reduce nitrogen and phosphorus loads. The plant's designed capacity is 1.00 (likely in thousands of cubic meters per day or similar), indicating a substantial infrastructure. The treated effluent from Kallby avloppsreningsverk is discharged into the Höjeå river, which flows into the Öresund Strait, a marine water body connecting the Baltic Sea to the North Sea. This coastal discharge requires careful management to protect the sensitive marine ecosystem, including fish spawning grounds and migratory bird habitats. The plant plays a key role in maintaining water quality in the region, supporting both ecological health and recreational use of the coastal area.

The plant discharges into the Höjeå river, which flows into the Öresund Strait, a narrow marine passage between Sweden and Denmark. The Öresund is part of the Baltic Sea ecosystem, characterized by brackish water and sensitive to nutrient pollution. The area supports diverse aquatic life, including cod, herring, and migratory birds. Effective nutrient removal at the plant is critical to prevent eutrophication and algal blooms in the coastal waters.