Enhanced performance and hindered membrane fouling for the treatment of coal chemical industry wastewater using a novel membrane electro-bioreactor with intermittent direct current
Enhanced performance and hindered membrane fouling for the treatment of coal chemical industry wastewater using a novel membrane electro-bioreactor with intermittent direct current
复制标题
新型间歇直流膜电生物反应器在处理煤化工废水时增强性能并抑制膜污染
DOI：
10.1016/j.biortech.2018.09.063
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发表时间：
2019-01-01
影响因子：
11.4
通讯作者：
Hursthouse, Andrew S.
中科院分区：
文献类型：
--
作者：
Hou, Baolin;Kuang, Yu;Hursthouse, Andrew S.
采用间歇直流电对膜生物反应器进行处理，建立了集生物处理、电动现象和膜过滤于一体的膜电生物反应器。MEBR处理效果明显改善，膜污染减轻。在24 '-OFF/6'-ON曝气模式下，COD和总酚的去除率分别为83.53%和93.28%，高于MBR的71.24%和82.43%。膜生物反应器的跨膜压力增加速率显著下降，这主要是由于电凝聚、电泳、电渗和离子电迁移等电动效应导致污泥絮体尺寸增大，zeta电位、可溶性微生物产物和比过滤阻力下降所致。值得注意的是，DC暴露对微生物群落产生了明显的进化，微生物群落的丰富度和多样性得到了提高。功能属的相对丰度在MEBR中得到显著提高。微生物群落结构、混合液性质和操作参数之间存在交互相关性。
A membrane electro-bioreactor (MEBR) embracing biological treatment, electrokinetic phenomena and membrane filtration was established by applying intermittent direct current (DC) to MBR. MEBR exhibited significant improvement of treatment performance and reduction of membrane fouling. COD and total phenols removal efficiencies increased to 83.53% and 93.28% at an exposure mode of 24'-OFF/6'-ON, compared to 71.24% and 82.43% in MBR. Trans-membrane pressure increment rate declined dramatically in MEBR, which was mainly attributed to the increase of sludge floc size and decrease of zeta potential, soluble microbial products and specific resistance to filtration, resulted from electrokinetic effects such as electrocoagulation, electrophoresis, electroosmosis and electromigration of ions. It was notable that DC exposure exerted distinct evolution on microbial community, with the improvement of microbial community richness and diversity. The relative abundances of functional genera were promoted noticeably in MEBR. An interactive relevance existed among microbial community structure, mixed liquor properties and operational parameters.