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Steady performance of a zero valent iron packed anaerobic reactor for azo dye wastewater treatment under variable influent quality

查看全文 作　　者：Yaobin [1]Zhang;Yiwen [1]Liu;Yanwen [1]Jing;Zhiqiang [1]Zhao;Xie [1]Quan 高影响力作者 机构地区：[1]Key Laboratory of Industrial Ecology and Environmental Engineering(MOE),School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China高影响力机构 出　　处：《Journal of Environmental Sciences》索引2012年第24卷第4期,共8页高影响力期刊 基　　金：supported by the National Basic Research Program of China (No. 2007CB407302);the Natural Science Foundation of China (No. 21177015);the New Century Excellent Talent Program of the Ministry of Education of China (No. NCET-10-028);the Fundamental Research Funds for the Central Universities of China (No.DUT11ZD108);the Program for Changjiang Scholars and Innovative Research Team at the University of China(No. IRT0813) 摘　　要：Zero valent iron(ZVI) is expected to help create an enhanced anaerobic environment that might improve the performance of anaerobic treatment.Based on this idea,a novel ZVI packed upflow anaerobic sludge blanket(ZVI-UASB) reactor was developed to treat azo dye wastewater with variable influent quality.The results showed that the reactor was less influenced by increases of Reactive Brilliant Red X-3B concentration from 50 to 1000 mg/L and chemical oxygen demand(COD) from 1000 to 7000 mg/L in the feed than a reference UASB reactor without the ZVI.The ZVI decreased oxidation-reduction potential in the reactor by about 80 mV.Iron ion dissolution from the ZVI could buffer acidity in the reactor,the amount of which was related to the COD concentration.Fluorescence in situ hybridization test showed the abundance of methanogens in the sludge of the ZVI-UASB reactor was significantly greater than that of the reference one.Denaturing gradient gel electrophoresis showed that the ZVI increased the diversity of microbial strains responsible for high efficiency. 关 键 词：染料废水处理 偶氮染料废水 零价铁 稳定性能 进水水质 厌氧反应器 上流式厌氧污泥床反应器 包装
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