LNIANO Wastewater Treatment Plant, Lniano, Poland

The LNIANO wastewater treatment plant is located in the town of Lniano, within the powiat świecki of województwo kujawsko-pomorskie, Poland. It serves a population of approximately 3,375 residents, classifying it as a small agglomeration under Polish and EU regulations. The plant operates as a key component of the local municipal wastewater infrastructure. The plant provides secondary treatment, which is the minimum standard required under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations of this size. With a designed capacity of 2,100 m³/day and an average discharge volume of 481.22 m³/day, the facility operates well within its capacity. The treatment process ensures that effluent meets regulatory standards before discharge. The treated wastewater is discharged into a local watercourse, which ultimately drains into the Vistula River basin and then into the Baltic Sea. The plant plays a vital role in protecting the region's water quality and supporting the ecological health of downstream aquatic environments. Its operation contributes to the preservation of the Vistula River ecosystem and the Baltic Sea's coastal waters.

The LNIANO plant discharges treated wastewater into a local stream that flows into the Vistula River, one of Poland's major rivers. The Vistula drains into the Baltic Sea, a semi-enclosed sea with sensitive marine ecosystems. The plant's secondary treatment helps reduce nutrient loads, mitigating eutrophication risks in the Baltic Sea. The surrounding region features agricultural land and small water bodies that benefit from improved water quality.