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- W2057173671 abstract "Abstract Confirmation of the ready and ultimate biodegradation of para -dichlorobenzine ( p DCB) was obtained from the Organisation for Economic Cooperation and Development (OECD) closed bottle test. The fate of p DCB during primary sedimentation of raw sewage was investigated in a simple laboratory study, and the results indicated that the major proportion of the material (> 67%) remained in the supernant liquor, and would therefore undergo biological treatment. The removal of p DCB in the OECD confirmatory test was found to be consistently high (97.1 ± 2.3%). Mass balance results indicated that, at a high aeration rate (∼21 min −1 ), the major mechanism for removal of p DCB was volatilization (66.6 ± 19.3%). The fate of p DCB in a modified porous pot test, operated at a lower aeration rate, and at temperatures of 8, 15, and 20°C and sludge retention times (SRT) of 3 and 6 days, was also investigated. Once again the overall removal was found to be consistently >95%. Mass balance results suggested that, under normal operating conditions, the major proportion of p DCB (>76%) had been removed by biodegradation. The amount of p DCB removed by volatilization showed a slight dependence on aeration rate, but only became significant (63 ± 4%) when adverse operating conditions prevailed (i.e. 8°C, at a 3 day SRT). Radioisotopic studies confirmed the presence of p DCB degrading bacteria in activated sludge taken from a porous pot continuously dosed with p DCB. The results of a similar test using sludge from an undosed porous pot suggested that acclimatization to p DCB was rapid, occurring within 2 days. No adverse effects on sewage treatment processes, due to the presence of p DCB, were observed." @default.
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- W2057173671 date "1987-03-01" @default.
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- W2057173671 title "The biodegradability of para-dichlorobenzene and its behaviour in model activated sludge plants" @default.
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- W2057173671 doi "https://doi.org/10.1016/0043-1354(87)90208-9" @default.
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