Abstract
The article assesses the efficiency of pollutant removal at the sewage treatment plant in Goleniów after modernization of the technological system. The extension and modernization of the existing installation resulted from the need to adapt the treatment plant to accept larger loads of pollutants, improve the parameters of treated sewage discharged to the receiver, and the poor technical condition of the equipment. Before the modernization of the treatment plant, an increase in the loads of COD, BOD<sub>5</sub>, and periodic total suspended solids in raw sewage was observed as well as a reduction in the efficiency of removing pollutants from the sewage. The efficiency of removing pollutants after modernization was in the range of BOD<sub>5</sub> - 94.4 ÷ 99.8%, COD - 89.3 ÷ 98.9%, total suspended solids TSS - 95.3 ÷ 99.7%, total nitrogen - 64.1 ÷ 95.4%, and total phosphorus - 75.4 ÷ 99.4%.
Highlights
The composition of wastewater is one of the basic criteria for the selection and modernization of the sewage treatment technological system
Due to the modernization of the wastewater treatment plant, which took place from May 2010 to December 2011, this period was not included in the analysis of the effectiveness of the treatment plant's operation
Before the modernization of the technological system of the treatment plant, BOD5 in raw sewage was in the range of 163 ÷ 420 gO2/m3, and after modernization 154 ÷ 780 gO2/m3
Summary
The composition of wastewater is one of the basic criteria for the selection and modernization of the sewage treatment technological system. It is diverse, variable over time and depends on many factors, including the nature and size of. The expansion and modernization of the treatment plant were necessary due to the increasing loads of pollutants in the wastewater flowing into the treatment plant. This was caused by the expansion of the sanitary sewage system and the connection of the Goleniów Industrial Park to the wastewater treatment plant
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