Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

查看全文 作　　者：LI [1]Yongmei;LI [1,2]Wenshu;GU [1]Guowei

机构地区：[1]State Key Laboratory of Pollutant Control and Resources Reuse,Tongji University,Shanghai 200092,China;[2]Jiangsu Electric Power Design Institute,Nanjing 210024,China

出　　处：《Frontiers of Environmental Science & Engineering》索引2007年第1卷第4期,共5页

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.50108009). 摘　　要：Batch experiments were carried out to investigate the promotive effect of pyridine on indole degradation under denitrifying conditions.The seed sludge was obtained from a local coal-coking wastewater treatment facility and was acclimated in the laboratory.Indole and pyridine were supple-mented to the synthetic wastewater at different ratios.The optimum ratio of chemical oxygen demand(COD)to nitrate(C/N)was 8.4-8.9 for both denitrification and indole and pyridine degradation.At a temperature of 28°C and pH of 7.0-7.5,the nitrate reductase activity(NRA)was in the best state.The addition of pyridine could promote NRA and the degradation of indole.When the initial concentration of indole was 150 mg/L,the concentration ratio of indole to pyridine was in the range of 1-10.Under optimum C/N conditions,the degradation of indole could be described with pseudo-zero-order kinetics.There was no accumulation of nitrite during the reaction.When the concentration ratio of pyridine to indole was less than 0.25 with an increase in the pyridine proportion,there were more significant augment rates for NRA and the degradation of indole than the situation when the concentration ratio was more than 0.25. 关键词：INDOLE PYRIDINE promotive effect DENITRIFICATION nitrate reductase activity

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Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

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