The article presents effectiveness of sewage pollutants’ reduction in Sewage Treatment Plant „KUJAWY”. Treatment plant “KUJAWY” is meant to neutralise living sewage from Nowa Huta quarter for Krakow city. Capacity of the treatment plant is 80 000 m3*d-1. The research was carried out in the period from 01.04.2006 to 31.03.2007. Results’ analysis was performed on the basis of raw and treated sewage concentration. Three pollutants’ indexes from the basic group were analysed: BOD5, CODCr and total suspended solids and two indexes from the eutrophic group: general nitrogen and general phosphorus. Basing on the results’ analysis, mean effectiveness of BOD5 reduction was defined on the level of 98,5%, CODCr – 96,0%, total suspended solids– 98,2%, general nitrogen– 73,7% and general phosphorus – 91,4%. ...
The article presents effectiveness of sewage treatment in Dąbrowa Tarnowska treatment plant. The research was carried out in the period from January 2005 to September 2007. Two indexes from the basic group: BOD5, total suspended solids and from the eutrophic group: general nitrogen and general phosphorus were physicochemically analysed. Efficiency of treatment was on the low level, which concerns basic pollution indexes BOD5 and total suspended solids, as well as biogenic compounds (general nitrogen and general phosphorus). The reason for this may be bad technical state of the treatment plant, which was built in the sixties of the 20th century. The problem may be solved by building a modern sewage treatment plant, which allows to treat sewages up to the level admissible by the obliging Ordinance. ...
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.
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