VANNASBY AVL REN VERK - Advanced Wastewater Treatment Plant in Vännäsby, Sweden

VANNASBY AVL REN VERK is an advanced wastewater treatment plant located in Vännäsby, a locality in Vännäs Municipality, Västerbotten County, Sweden. The plant serves a population of approximately 4,500, classifying it as a small to medium agglomeration under Swedish and EU regulations. Its address is on Nöjesgatan in the Diket area of Vännäsby. The plant employs advanced treatment processes, which go beyond the secondary treatment standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 8,500 cubic meters per day and a current discharge volume of 710.5 cubic meters per day, the facility operates well below its capacity, indicating room for future growth or seasonal variations. The plant is situated inland, more than 10 km from the coast, and its treated effluent is discharged into the local watercourse, which ultimately flows into the Ume River. The Ume River is one of the largest rivers in northern Sweden, draining into the Gulf of Bothnia. The river supports diverse aquatic life, including salmon and sea trout populations, and is an important ecological corridor in the region. The advanced treatment at this plant helps protect the river's water quality and downstream ecosystems.

The plant discharges into a local watercourse that is part of the Ume River basin, which flows into the Gulf of Bothnia in the Baltic Sea. The Ume River is a significant waterway in Västerbotten, supporting salmonid fisheries and diverse aquatic habitats. The advanced treatment level ensures that nutrient and pollutant loads are minimized, protecting the river's ecological health and the sensitive coastal environment of the Gulf of Bothnia.