膜污染
膜
胞外聚合物
阴极
阳极
生物污染
化学工程
结垢
微生物燃料电池
生物反应器
化学
渗透
材料科学
电极
生物膜
细菌
物理化学
工程类
生物
有机化学
生物化学
遗传学
作者
Kai Zhao,Fan Su,Kanghui Gu,Jing Qi,Ruiping Liu,Chengzhi Hu
标识
DOI:10.1016/j.biortech.2021.125230
摘要
Serious membrane fouling limits the application of anaerobic membrane bioreactors (AnMBRs) in sewage treatment. Herein, a novel electrochemical AnMBR (eAnMBR) was established by integrating electrocoagulation and a conductive membrane into an AnMBR. Compared with the traditional AnMBR, TP average removal rate increased by 24.97% and the membrane service cycle extended by 109.68% in the eAnMBR. Low extracellular polymeric substance concentration and large floc size were found in the mixed liquid of the eAnMBR due to the combined effect of coagulation and electric field, which induced a porous and hydrophilic cake layer, resulting in excellent water permeation capabilities. Additionally, the conductive membrane cathode effectively suppressed membrane fouling by the electrostatic repulsion and gas scouring. In the eAnMBR, the presence of an electric field and iron ions enriched the diversity of the microbial community, which may improve the adaptation of biochemical systems to environmental changes.
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