Mechaniczno Biologiczna Wastewater Treatment Plant, Łobżenica, Greater Poland

Mechaniczno Biologiczna is a wastewater treatment plant located in Łobżenica, a town in the Greater Poland Voivodeship of Poland. The plant serves a population of approximately 3,246 people, classifying it as a small agglomeration under Polish and EU regulations. The plant provides secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. Its designed capacity is 1,250 m³/day, and current discharge volume is 462.83 m³/day, indicating operational capacity well within design limits. Treated effluent is discharged into local waterways that ultimately drain into the Noteć River basin, part of the Oder River system flowing into the Baltic Sea. The plant plays a key role in protecting local water quality in this agricultural region of western Poland.

The plant discharges into the Noteć River catchment, which flows into the Warta River and then the Oder River, reaching the Baltic Sea. This watershed supports diverse aquatic life and is important for regional biodiversity. The area is predominantly agricultural, so nutrient removal from wastewater helps prevent eutrophication in downstream waters.