Oczyszczalnia Kolejowa 8 - Primary Wastewater Treatment Plant in Ośno Lubuskie, Poland

Oczyszczalnia Kolejowa 8 is a wastewater treatment plant located in Ośno Lubuskie, a town in the Lubusz Voivodeship of western Poland. The plant serves a small population of 650 residents, reflecting the scale of a local municipal facility in a rural-urban setting. As a primary treatment plant, it provides basic mechanical treatment including sedimentation to remove solids. Under the EU Urban Waste Water Treatment Directive (91/271/EEC), agglomerations with a population equivalent (PE) between 2,000 and 10,000 typically require secondary treatment. However, for smaller agglomerations like this one (650 PE), appropriate treatment is determined by national regulations. The plant has a designed capacity of 1962 m³/day and currently discharges 92.68 m³/day, indicating significant spare capacity. The treated effluent is discharged into local watercourses that ultimately drain into the Oder River basin, which flows northward into the Baltic Sea. The region's aquatic ecosystems support diverse freshwater species, and proper treatment helps protect downstream water quality in the Oder estuary and Baltic coastal zone.

The plant discharges into the Oder River basin, which flows through western Poland and empties into the Baltic Sea via the Szczecin Lagoon. The Oder basin supports diverse aquatic life, including migratory fish species, and its water quality is critical for both ecological health and human uses downstream. The Baltic Sea is a sensitive brackish environment where nutrient inputs can contribute to eutrophication, making effective wastewater treatment important for regional marine conservation.