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The release of sludge-born bacteria and their further subsurface transport was studied. The migration of bacteria was investigated in column experiments which were carried out under the conditions corresponding to naturally occurring extreme rainfall. Coal fly ash as well as coarse and medium grained sand, whose properties are similar to the soils present in degraded areas, were used as column beds...
This study indicates that in the wastewater treatment plant "Wschód" in Gdańsk, working in the modified UCT system, the effectiveness of bacteria pollutant removal varies from 92 to 99% and almost 100% of parasites are removed. Despite this, the number of indicator bacteria and periodical presence of Salmonella in the effluent indicates that it is strongly bacteriologically polluted. It...
Heavy metals removal from municipal wastewater has been studied. This paper presents results of investigations carried out in 2000-2001. The investigations concerned analysis of wastewater and sewage sludge from the wastewater treatment plant "Wschód" in Gdańsk, where the modified system UCT (MUCT) is used. It was indicated that the concentrations of seven heavy metals (Zn, Cu, Pb, Cd,...
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