Abatement of the membrane biofouling: Performance of an in-situ integrated bioelectrochemical-ultrafiltration system

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 中国科学院饮用水科学与技术重点实验室

	Abatement of the membrane biofouling: Performance of an in-situ integrated bioelectrochemical-ultrafiltration system
	Xu, Lei; Graham, Nigel J. D.; Wei, Chaocheng; Zhang, Li; Yu, Wenzheng
刊名	WATER RESEARCH
	2020-07-15
卷号	179 页码:1-17
关键词	Membrane fouling Ultrafiltration Bioelectrochemical system Electron transfer Extracellular polymeric substance Electroactive bacteria
ISSN号	0043-1354
英文摘要	The practical applications of membrane-based water treatment techniques are constrained by the problem of membrane fouling. Various studies have revealed that interactions between extracellular polymeric substances (EPS) and the membrane surface determine the extent of irreversible fouling. Herein, we describe a novel bioelectrochemical system (BES) integrated with an ultrafiltration (UF) membrane in order to provide an enhanced antifouling property. It was found that the integrated BES membrane system had a superior performance compared to a conventional (control) UF system, as manifested by a much lower development of transmembrane pressure. The BES significantly reduced microbial viability in the membrane tank and the imposed electrode potential contributed to the degradation of biopolymers, which favored the alleviation of membrane fouling. Notably, the electron transfer between the acclimated microorganisms and the conductive membrane in the BES integrated system exhibited an increasing trend with the operation time, indicating a gradual increase in microbial electrical activity. Correspondingly, the accumulation of extracellular polymeric substances (EPS) on the membrane surface of the BES integrated system showed a substantial decrease compared to the control system, which could be attributed to a series of synergistic effects induced by the BES integration. The differences in the microbial diversity between the control and the BES integrated system revealed the microbial selectivity of the poised potential. Specifically, microbial strains with relatively high EPS production, like the genus of Zoogloea and Methyloversatilis, were reduced significantly in the BES integrated system, while the expression of the electroactive bacteria was promoted, which facilitated extracellular electron transfer (EET) and therefore the bioelectrochemical reactions. Overall, this study has presented a feasible and promising new approach for membrane fouling mitigation during the process of water treatment. (c) 2020 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45231]
专题	生态环境研究中心_中国科学院饮用水科学与技术重点实验室
推荐引用方式 GB/T 7714	Xu, Lei,Graham, Nigel J. D.,Wei, Chaocheng,et al. Abatement of the membrane biofouling: Performance of an in-situ integrated bioelectrochemical-ultrafiltration system[J]. WATER RESEARCH,2020,179:1-17.
APA	Xu, Lei,Graham, Nigel J. D.,Wei, Chaocheng,Zhang, Li,&Yu, Wenzheng.(2020).Abatement of the membrane biofouling: Performance of an in-situ integrated bioelectrochemical-ultrafiltration system.WATER RESEARCH,179,1-17.
MLA	Xu, Lei,et al."Abatement of the membrane biofouling: Performance of an in-situ integrated bioelectrochemical-ultrafiltration system".WATER RESEARCH 179(2020):1-17.