Hammars Avloppsreningsverk - Advanced Wastewater Treatment in Hammar, Sweden

Hammars Avloppsreningsverk is a municipal wastewater treatment plant located in Hammar, Askersund Municipality, Örebro County, Sweden. The plant serves a population of approximately 3,100 and is situated near the shores of Lake Vättern, one of Sweden's largest lakes. The plant employs advanced treatment processes, which go beyond the secondary treatment standards required by the EU Urban Waste Water Treatment Directive (91/271/EEC). With a designed capacity of 5,000 m³/day and an average discharge volume of 486 m³/day, the facility operates well within its capacity, ensuring effective treatment for the local community. The treated effluent is discharged into the local watershed that drains into Lake Vättern, a large oligotrophic lake known for its clear waters and diverse aquatic life. The lake is an important ecological and recreational resource, supporting fish species such as Arctic char and brown trout. The plant's advanced treatment helps protect water quality in this sensitive environment.

The plant discharges into the catchment area of Lake Vättern, Sweden's second-largest lake, which ultimately drains via the Motala Ström river into the Baltic Sea. Lake Vättern is an oligotrophic lake with high water clarity and supports a unique ecosystem, including the endemic Vättern char. The advanced treatment at Hammars Avloppsreningsverk helps minimize nutrient loading and protects the lake's sensitive ecology.