Brzezno Wastewater Treatment Plant, Brzeźno, Greater Poland Voivodeship

Brzezno wastewater treatment plant is located in Brzeźno, a village in the Greater Poland Voivodeship (województwo wielkopolskie) of Poland. The plant serves a population of 2,725, classifying it as a small agglomeration under Polish and EU regulations. It operates secondary treatment, which is the minimum standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for freshwater discharges from agglomerations of this size. The plant has a designed capacity of 5,430 cubic meters per day and currently discharges an average of 388.54 cubic meters per day, indicating significant spare capacity. Secondary treatment typically involves biological processes such as activated sludge or trickling filters to reduce organic matter and suspended solids. The treated effluent is discharged into a local watercourse, likely a tributary of the Noteć River, which flows into the Warta River and ultimately the Oder River, draining into the Baltic Sea. The plant's operation helps protect the local watershed and downstream aquatic ecosystems from nutrient pollution and organic loading.

The plant discharges into a local watercourse that is part of the Noteć River basin, which flows into the Warta River and then the Oder River, reaching the Baltic Sea. The region is characterized by agricultural land use, and the plant's secondary treatment reduces nutrient loads that could otherwise contribute to eutrophication in downstream waters. The Baltic Sea is particularly sensitive to nutrient pollution, making effective wastewater treatment crucial for marine ecosystem health.