Wojnowice Wastewater Treatment Plant, Gnin, Poland

Wojnowice is a wastewater treatment plant located near Gnin in the Wielkopolskie Voivodeship of Poland. It serves a small population of 375 residents, reflecting its role in a rural or small community setting. The plant is situated inland, away from coastal areas, and operates within the local water management framework. The plant provides secondary treatment, which is the standard biological treatment stage required under Polish and EU regulations for smaller agglomerations. With a designed capacity of 3000 m³/day and a current discharge volume of 53.47 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variations. As part of the EU Urban Waste Water Treatment Directive (91/271/EEC), secondary treatment is mandatory for all agglomerations above 2000 population equivalent, but smaller plants like Wojnowice are also expected to meet appropriate treatment standards. The treated effluent is discharged into local water bodies, contributing to the protection of the Oder River basin and the Baltic Sea catchment. The plant's operation helps maintain water quality in the region, supporting aquatic ecosystems and downstream water uses. Its inland location reduces direct marine impact, but proper treatment remains essential for preventing nutrient pollution in the broader watershed.

The plant discharges into local streams that feed into the Oder River basin, which ultimately drains into the Baltic Sea. This watershed supports diverse aquatic life and is important for regional water resources. The secondary treatment process helps reduce organic pollutants and nutrients, mitigating eutrophication risks in downstream water bodies and the Baltic Sea.