Timmele avloppsreningsverk - Advanced Wastewater Treatment Plant in Annestorp, Sweden

Timmele avloppsreningsverk is a municipal wastewater treatment plant located in Annestorp, within Ulricehamn municipality, Västra Götaland County, Sweden. The plant serves a population of around 3,145, classifying it as a small agglomeration under Swedish and EU regulations. The facility provides advanced treatment, which goes beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Advanced treatment typically includes nutrient removal (nitrogen and phosphorus) to protect sensitive receiving waters. The plant has a designed capacity of 3,000 m³/day and discharges an average volume of 493.71 m³/day. The treated effluent is discharged into a local watercourse that eventually drains into the Ätran River system, which flows into the Kattegat (part of the North Sea). This watershed supports diverse aquatic life and is important for regional biodiversity. The plant's advanced treatment helps minimize nutrient loading and protects downstream ecosystems.

The plant discharges into a local stream that is part of the Ätran River basin, which flows westward into the Kattegat sea area. The Ätran watershed supports salmonid populations and other sensitive species, making nutrient and pollutant control critical. Advanced treatment at this plant reduces phosphorus and nitrogen loads, helping to prevent eutrophication in the downstream coastal waters.