Effects of an electric field and zero valent iron on anaerobic treatment of azo dye wastewater and microbial community structures
Effects of an electric field and zero valent iron on anaerobic treatment of azo dye wastewater and microbial community structures
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DOI：
10.1016/j.biortech.2010.11.109
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发表时间：
2011-02-01
影响因子：
11.4
通讯作者：
Chen, Shuo
中科院分区：
文献类型：
--
作者：
Liu, Yiwen;Zhang, Yaobin;Chen, Shuo
为了提高偶氮染料废水的处理效果，在厌氧反应器中填料了一种带有一对电极的零价铁（ZVI）床。实验在三个并联运行的反应器中进行：电场增强型zvi -厌氧反应器（R1）、zvi -厌氧反应器（R2）和普通厌氧反应器（R3）。R1对COD的去除率和颜色的去除率最高。R1的升压进一步改善了其性能。扫描电镜图像显示，RI颗粒污泥经高浓度染料加料后结构完整，而R3颗粒污泥结构破碎。荧光原位杂交分析表明，R1反应器中产甲烷菌的丰度显著大于其他两个反应器。变性梯度凝胶电泳结果表明，电场和ZVI的耦合作用增加了微生物群落的多样性，特别是增强了负责脱色的细菌菌株。英国皇家版权所有(C) 2010出版的爱思唯尔有限公司版权所有。
A zero valent iron (ZVI) bed with a pair of electrodes was packed in an anaerobic reactor aiming at enhancing treatment of azo dye wastewater. The experiments were carried out in three reactors operated in parallel: an electric field enhanced ZVI-anaerobic reactor (R1), a ZVI-anaerobic reactor (R2) and a common anaerobic reactor (R3). R1 presented the highest performance in removal of COD and color. Raising voltage in R1 further improved its performance. Scanning electron microscopy images displayed that the structure of granular sludge from RI was intact after being fed with the high dye concentration, while that of R3 was broken. Fluorescence in situ hybridization analysis indicated that the abundance of methanogens in R1 was significantly greater than that in the other two reactors. Denaturing gradient gel electrophoresis showed that the coupling of electric field and ZVI increased the diversity of microbial community and especially enhanced bacterial strains responsible for decolorization. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.