Lisewo Wastewater Treatment Plant, Lisewo-Parcele, Poland

The Lisewo wastewater treatment plant is located in Lisewo-Parcele, a village in the Wielkopolskie Voivodeship of central Poland. It serves a small population of 669 residents, reflecting its role in a rural community. The plant is part of Poland's municipal wastewater infrastructure, which is regulated under national laws transposing the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the minimum standard required by the EU directive for discharges into freshwater and estuaries from agglomerations of this size. With a designed capacity of 300 m³/day and an actual discharge volume of 95.39 m³/day, the plant operates well within its capacity. The treatment process likely involves biological treatment to reduce organic matter and suspended solids before discharge. The treated effluent is discharged into a local watercourse, which ultimately drains into the Warta River basin and then into the Oder River, flowing into the Baltic Sea. The plant's operation helps protect the local aquatic environment and downstream ecosystems from nutrient pollution and other contaminants, supporting water quality in the region.

The plant discharges into a small watercourse that flows into the Warta River, a major tributary of the Oder River. The Oder drains into the Baltic Sea, a sensitive marine environment prone to eutrophication. The plant's secondary treatment reduces organic load and nutrients, helping to mitigate algal blooms and maintain ecological balance in the downstream river system and coastal waters.