Overview
OS Lemna is a secondary wastewater treatment plant in Frydek, Silesian Voivodeship, Poland, serving approximately 1,750 people with a designed capacity of 3,009 m³/day.
OS Lemna is a wastewater treatment plant located in Frydek, a village in the Silesian Voivodeship of southern Poland. The plant serves a small population of around 1,750 people, reflecting its role in a rural or peri-urban community. It operates under Polish regulations that transpose the EU Urban Waste Water Treatment Directive (91/271/EEC), which sets treatment standards based on agglomeration size and receiving water sensitivity. The plant provides secondary treatment, which is the minimum required under the EU directive for freshwater discharges from agglomerations of this scale. With a designed capacity of 3,009 m³/day and a reported discharge volume of 249.52 m³/day, the plant operates well below its capacity, indicating potential for future growth or seasonal variability. Secondary treatment typically involves biological processes such as activated sludge or trickling filters. The treated effluent is discharged into a local watercourse, likely part of the Vistula River basin, which ultimately drains into the Baltic Sea. The plant's operation helps protect downstream water quality in a region characterized by mixed agricultural and industrial land use. By reducing organic load and nutrients, OS Lemna contributes to the ecological health of the Silesian watershed and supports compliance with EU water quality standards.
Environmental context
The plant discharges into a local watercourse within the Vistula River basin, which flows northward through Poland and empties into the Baltic Sea via the Gdańsk Bay. The Silesian region is a densely populated and historically industrial area, making wastewater treatment critical for mitigating nutrient and pollutant loads. The downstream environment includes ecologically sensitive areas such as the Vistula delta and coastal Baltic habitats, which are vulnerable to eutrophication from excess nitrogen and phosphorus. Effective secondary treatment at OS Lemna helps reduce these impacts, supporting aquatic biodiversity and regional water quality goals.
Frequently asked questions
OS Lemna is located in Frydek, a village in the gmina Miedźna, pszczyński powiat, Silesian Voivodeship, southern Poland.
The plant serves approximately 1,750 people, classifying it as a small agglomeration under the EU Urban Waste Water Treatment Directive.
The treated effluent is discharged into a local watercourse within the Vistula River basin, which flows to the Baltic Sea.
OS Lemna provides secondary treatment, which is the standard required by the EU Urban Waste Water Treatment Directive for freshwater discharges from agglomerations of this size.
As a Polish plant, OS Lemna operates under national regulations that implement the EU Urban Waste Water Treatment Directive (91/271/EEC). For small agglomerations like this, secondary treatment is typically sufficient unless the receiving water is designated as sensitive.
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