The paper presents the efficiency of the sewage treatment based on the ex-ample of the sewage treatment plant in Dobczyce. The resarch was based on the analysis of 44 raw sewage and treated sewage from January 2007 to December 2010. Values of five selected pollution indexes were analyzed: BOD5, COD, total suspended solids, general nitrogen and general phosporus. The amount of the transgressions of the admissible index values in relation to the water law permis-sion was defind. The effectiveness of the indexes' decrease In the tested period was analyzed. The carried out research showed the high efficiency of the pollutants amount decrease: BOD5 - 98,9%, COD - 97,6%, total suspended solids - 97,6%, general nitrogen - 89,4%, general phosporus - 97,6%. ...
In the article presents effectiveness of sewage treatment in Sewage Treatment Plant in Lipnica Wielka. The domestic sewage follow into the Sewage Treatment Plant in gravity system. The method used for sewage treatment is based on the active sludge method with chemical precipitation of phosphor. The research was carried out in the period from March 2009 to June 2010. The analysis was performed on samples of raw and treated sewage. Three indicators of pollutants were analysed: BOD5, COD, total suspended solids. Furthermore was determined the volume of sewage flowing into the sewage treatment plant.Basing on the results analysis, effectiveness of BOD5 reduction was defined on the level of 96,23%, COD- 91,42% and total suspended solids - 95,71%. Also it was observed that research of volume of sewage flowing into the sewage treatment plant, were indicated a hydraulically underload.
...
