Krzeszyce Wastewater Treatment Plant, Słubice, Poland | Secondary Treatment for 3,898 Population

The Krzeszyce wastewater treatment plant is located in Słubice, within the lubuskie province of western Poland. It serves a population of approximately 3,898 people, classifying it as a small agglomeration under Polish and EU regulations. The plant is situated near the Oder River basin, which ultimately drains into the Baltic Sea. The facility provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size in non-sensitive areas. The plant's designed capacity is 3,600 m³/day, and it treats an average daily flow of about 556 m³, indicating operational capacity well within design limits. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that feed into the Oder River, a major European waterway. The Oder flows northward to the Szczecin Lagoon and then into the Baltic Sea. The plant's operation helps protect the Oder's water quality and the downstream ecosystems, including the lagoon and Baltic coastal waters, from nutrient pollution and other contaminants.

The plant discharges into local streams that are part of the Oder River basin. The Oder flows through Poland and Germany, eventually reaching the Szczecin Lagoon and the Baltic Sea. This watershed supports diverse aquatic life and is an important ecological corridor for migratory fish. The Baltic Sea is sensitive to nutrient inputs, making effective wastewater treatment crucial for preventing eutrophication and maintaining marine ecosystem health.