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《Journal of Safety and Environment》 2005-02
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Comparison of biodegradation of benzene hydrocarbons gas with mixed culture from petrifaction sludge and white-rot fungi

WANG Juan, ZHONG Qin, ZHENG Man-man(School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)  
The article aims to introduce the authors' study on the biodegradation of benzene, toluene and xylene gas with mixed culture from petrifaction sludge acclimated by toluene and white-rot fungi so as to discover the suitable bacteria for the biodegradation of benzene hydrocarbons in biotrickling filter. The authors have also studied the difference of VOCs concentration, starting-point, degradation rate and the degree for benzene hydrocarbons with mixed culture from the petrifaction sludge. The results show that the degradation capability of benzene with mixed culture is much higher than that with white-rot fungi. As a result, it was found that the maximum removing efficiency could reach 100% with the mixed culture and only 46.1% with the white-rot fungi. The biodegradability of the compounds with mixed culture was just in the order of the following: toluene at the top, with benzene being better and xylene-good. The starting-point of the research is to prolong and decrease the removing efficiency with the increase of original concentration with the same compound. The average degradation rate for the same compound proves to be lower than that after starting-point. In so doing, the mixed culture from petrifaction sludge can be superior to the white-rot fungi for the degradation of benzene hydrocarbons.
【Fund】: 江苏省自然科学基金项目 (BK2 0 0 10 60 )
【CateGory Index】: X703
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