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Simultaneous anaerobic-aerobic biodegradation of halogenated phenolic compound under oxygen-limited conditions

查看全文 作　　者：CHEN Yuan-[1,2]cai;LAN Hui-[1]xia;ZHAN Huai-[1]yu;FU Shi-[1]yu 高影响力作者 机构地区：[1]State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641 , China;[2]Laboratory of Cellulose and Liguocellulosics Chemistry , Chinese Academy of Sciences, Guangzhou 510650, China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2005年第17卷第5期,共3页高影响力期刊 基　　金：The Natural Science Foundation of Guangdong(No. 31430) ,the State Key Laboratory of Pulp and Paper Engineering, South China University ofTechnology(No.200335) and Laboratory of Cellulose and Lignocellulosics Chemistry,Chinese Academy of Sciences 摘　　要：The successful application of co-immobilized aerobic-anaerobic biomass under limited aeration in wastewater treatment systems would eliminate the problems associated with the intermediates mono-chlorophenol(MCP) and di-chlorophenol(DCP) accumulations. With low initial pentachlorophenol(PCP) concentration, all PCP could be completely removed under oxygen-limited strict anaerobic conditions, and the removal efficiencies with different initial headspace oxygen percentage(IHOP) were not obviously different from each other. While at high initial PCP concentration, under strictly anaerobic conditions PCP and their intermediates were clearly higher than that under other conditions, and produced obvious accumulation, the highest PCP reduction was achieved by the system receiving 30 IHOP, oxygen-limited system also exhibited lower residual TOC concentration and lower concentration of metabolic intermediates MCP and DCP. These results suggested that under strictly anaerobic condition the reductive dechlorination of low chlorinated compounds became rate limiting in the reductive dechlorination pathway, less chlorinated compounds be more amenable to aerobic degradation, and the aerobes of outer layers could function under limited oxygen. The co-immobilized aerobic-anaerobic biomass for methanogenesis under limited-aeration for chlorophenol degradation might be an attractive and efficient alternative for the sequential anaerobic/aerobic system to achieve mineralization of a broad range of recalcitrance highly chlorinated organics and low final TOC concentrations. 关 键 词：DCP PCP 五氯苯酚 卤化反应 废水处理
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