Oczyszczalnia sciekow w Kaliszkowicach Olobockich - Secondary Wastewater Treatment Plant in Wielkopolskie, Poland

Oczyszczalnia sciekow w Kaliszkowicach Olobockich is a municipal wastewater treatment plant located in Kaliszkowice Ołobockie, within the Mikstat commune of the Ostrzeszów district in Wielkopolskie Voivodeship, Poland. The plant serves a small population of 215 residents, reflecting its role as a local facility for a rural community. The plant provides secondary treatment, which is the standard level required under Polish regulations implementing the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent (PE) between 2,000 and 15,000. Although the plant serves fewer than 2,000 PE, it still meets secondary treatment standards, ensuring effective removal of organic matter and suspended solids. The designed capacity is 2,400 m³/day, but current discharge volume is 30.66 m³/day, indicating ample capacity for the served population. The treated effluent is discharged into local surface waters, which eventually drain into the Oder River basin and ultimately the Baltic Sea. The plant's operation helps protect the local aquatic environment and downstream ecosystems from untreated sewage, supporting water quality in the region.

The plant discharges into small watercourses within the Oder River basin, which flows northward to the Baltic Sea. The local watershed includes agricultural and rural areas, where nutrient pollution from wastewater can contribute to eutrophication. Secondary treatment reduces organic load and nutrients, helping to maintain the ecological balance of receiving waters and supporting biodiversity in the downstream Oder estuary and Baltic Sea.