Understanding the mechanism of membrane fouling suppression in electro-anaerobic membrane bioreactor

被引：39

作者：

Zhang, Shuo ^{[1
]}

Yang, Kai ^{[3
]}

Liu, Wei ^{[1
]}

Xu, Ying ^{[1
]}

Hei, Shengqiang ^{[1
]}

Zhang, Jiao ^{[1
]}

Chen, Cheng ^{[1
]}

Zhu, Xianzheng ^{[1
]}

Liang, Peng ^{[1
]}

Zhang, Xiaoyuan ^{[1
]}

Huang, Xia ^{[1
,2
]}

机构：

[1] Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Sch Environm, Res & Applicat Ctr Membrane Technol, Beijing 100084, Peoples R China

[3] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Anhui, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 418卷

基金：

北京市自然科学基金;

关键词：

Anaerobic membrane reactor; Electric field; Membrane fouling; Electrophoresis; Mixed liquor filterability; Bioelectrochemical oxidation; EXTRACELLULAR POLYMERIC SUBSTANCES; HOLLOW-FIBER MEMBRANE; WASTE-WATER TREATMENT; ELECTROCHEMICAL OXIDATION; METHANOGENESIS; PERFORMANCE; VOLTAGE; SURFACE; FIELD;

D O I：

10.1016/j.cej.2021.129384

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Anaerobic membrane bioreactor (AnMBR) is a promising technology for wastewater treatment. However, membrane fouling as an inevitable challenge restricts its application. Recently novel membrane fouling control technology by applying electric field in AnMBR showed its economics and effectiveness. Nevertheless, the mechanism of fouling suppression is still unclear, limiting the development of this technology. In this study, electro-AnMBR was constructed. Long-term running showed that applying electric field of 0.5 V suppressed the membrane fouling evolution rate by nearly 23% and reduced the organic foulants on membrane by nearly 10%. To clarify the mechanism of fouling suppression, the contribution of electrophoresis to membrane fouling suppression was quantified by theoretical calculation for the first time. Results showed that electrophoresis was approximately equivalent to backwash with a flux of 0.56 L/(m2.h). Besides, impact of electric field on mixed liquor filterability of AnMBR was first investigated by dead-end filtration. Results presented that electric field reduced the filtration resistance of mixed liquor by nearly 77%. Then mixed liquor properties analysis, electrochemical oxidation simulation tests and metagenomic analysis revealed that electric field might improve mixed liquor filterability by bioelectrochemical oxidation. Finally, novel mechanism of electric field suppressed membrane fouling was elucidated, including electrophoresis to drive off the foulants and mixed liquor filterability improvement. This study might contribute to better understanding for membrane fouling control by applying electric field in AnMBR, and was meaningful for technical development.

引用

页数：10

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