Krzecin Wastewater Treatment Plant, Przybysław, Poland

The Krzecin wastewater treatment plant is located in Przybysław, within the gmina Krzęcin in the West Pomeranian Voivodeship of Poland. This facility serves a small population of 750 residents, reflecting its role in a rural community. The plant operates under Polish regulations that transpose the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets treatment standards based on agglomeration size. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. It has a designed capacity of 600 m³/day and currently discharges 106.94 m³/day of treated wastewater. For small agglomerations like this, secondary treatment is typically sufficient to meet regulatory requirements, though sensitive areas may necessitate more advanced treatment. The treated effluent is discharged into local watercourses that eventually drain into the Oder River basin and the Baltic Sea. The plant's operation helps protect downstream aquatic ecosystems from nutrient pollution and organic loading, supporting water quality in the region's rivers and coastal waters.

The treated wastewater from Krzecin flows into small streams within the Oder River basin, which ultimately reaches the Baltic Sea. This coastal ecosystem is sensitive to nutrient inputs that can cause eutrophication, making effective treatment crucial. The plant's secondary treatment reduces organic pollutants and nutrients, helping to maintain the ecological balance of the downstream waters.