Makolno Wastewater Treatment Plant, Mąkolno, Poland

The Makolno wastewater treatment plant is located in the village of Mąkolno, within the gmina Sompolno in the koniński powiat of województwo wielkopolskie, Poland. This facility serves a small population of 164 residents, reflecting its role in a rural community. The plant is part of Poland's municipal wastewater infrastructure, which operates under the EU Urban Waste Water Treatment Directive (91/271/EEC). The plant provides secondary treatment, which is the standard required by the EU directive for discharges into freshwater bodies from agglomerations of this size. With a designed capacity of 182 m³/day and an actual discharge volume of 23.38 m³/day, the facility operates well below its capacity, indicating it is sized for future growth or seasonal peaks. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local watercourses that ultimately drain into the Warta River basin, part of the Oder River system flowing into the Baltic Sea. The plant's operation helps protect the local aquatic environment and downstream ecosystems, including the Baltic Sea, by reducing nutrient and pollutant loads from the small community.

The plant discharges into local streams that feed into the Warta River, a major tributary of the Oder River, which flows into the Baltic Sea. The Baltic Sea is a semi-enclosed sea sensitive to nutrient pollution, making effective wastewater treatment crucial for reducing eutrophication risks. The surrounding area is primarily agricultural, so the plant also helps mitigate runoff impacts on local water quality.