Effects of 4-Chloro-Aliphatic Hydrocarbons on Microbial Activities of Anaerobic Landfill Leachate Digestion
Three four-chloro-aliphatic hydrocarbons (carbon tetrachloride (CT), tetrachloroethylene (PCE) and 1, 1, 2, 2-tetrachloroethane (1, 1, 2, 2-PCA)) were spiked individually at concentrations from 0.145 mg/L to 2.4 mg/L to anaerobic batch reactors treating young landfill leachate undergoing competition between main microbial groups of anaerobic consortia for an experimental period of four months. The effect of chlorinated compounds on the reactors’ organic matter removal performance and microbial activities was examined. Dissolved organic matter was removed at similar rates in all reactors. Gas production ceased in CT receiving reactors and decreased in PCE receiving reactors revealing inhibition on methanogens with no effect in PCA receiving reactors. Sulfatereducing bacteria’s activity was less inhibited by chlorinated aliphatic compounds than methanogenic activity. Chlorinated aliphatic hydrocarbons (CAHs) were monitored and biotransformation of PCE and PCA to TCE and 1, 1, 2-TCA was observed via reductive dechlorination and dehydrohalogenation.
anaerobic digestion landfill leachate methanogens sulfate-reducing bacteria chlorinated aliphatic hydrocarbon dechlorination
Dilek ERDIRENCELEBI Izzet OZTURK
Selcuk University,Environmental Eng. Dept.,Konya,Turkey Istanbul Technical University,Environmental Eng. Dept.,Maslak,Turkey
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
2159-2165
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）