Influence of the Bed Temperature on the Operational Reliability of a Hybrid Constructed Wetland Wastewater Treatment Plant in South-Western Poland—A Case Study

The aim of this study was to assess the influence atmospheric air temperature on efficiency and reliability pollutants removal from wastewater. studied facility a hybrid constructed wetland wastewater treatment plant with vertical horizontal flow serving single-family building in village Krajanów south-western Poland. operation evaluated basis studies conducted 2021–2022. tests included physico–chemical analysis treated mechanically settling tank effluents beds flow. following parameters were determined: BOD5, COD, total suspended solids, nitrogen, phosphorus. No statistically significant effect analyzed levels found. soil–plant bed never fell below 0 °C, so flowing through froze. discussed characterized by high tested across seasons. mean concentrations did not exceed limit values specified currently binding legal act. It shown that wetlands can be successfully used for climatic conditions southern