Oczyszczalnia Ścieków w Żernicy typu Bioblok - Secondary Wastewater Treatment in Silesia, Poland

Oczyszczalnia Ścieków w Żernicy typu Bioblok is a wastewater treatment facility located in Żernica, a village in the Gmina Pilchowice, Gliwice County, within the Silesian Voivodeship of southern Poland. The plant serves a population of approximately 1,014 residents, providing secondary treatment for the local community. As a secondary treatment plant, it meets the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. The plant has a designed capacity of 2,500 m³/day and currently discharges 144.58 m³/day, indicating it operates well below its capacity. The treatment process is described as a Bioblok system, a compact biological treatment technology common in smaller Polish communities. The treated effluent is discharged into local watercourses that drain into the Oder River basin, ultimately reaching the Baltic Sea. The plant plays a key role in protecting the region's surface waters from nutrient pollution, supporting aquatic life and downstream ecosystems in the Oder catchment.

The plant's discharge enters local streams that flow into the Kłodnica River, a tributary of the Oder River. The Oder basin is ecologically significant, supporting diverse fish species and migratory birds. The Baltic Sea, as the final destination, is sensitive to nutrient loads, making secondary treatment crucial for reducing eutrophication risks in coastal waters.