Effect of magnetic powder on membrane fouling mitigation and microbial community/composition in membrane bioreactors (MBRs) for municipal wastewater treatment

被引：53
|
作者：
Liu, Yi [1 ,2 ]
Liu, Qiang [2 ]
Li, Jixiang [1 ,3 ]
Ngo, Huu Hao [4 ]
Guo, Wenshan [4 ]
Hu, Jiajun [5 ]
Gao, Min-tian [5 ]
Wang, Qiyuan [6 ]
Hou, Yuansheng [7 ]
机构：
[1] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China
[2] Shanghai Univ, Shanghai 200444, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Univ Technol Sydney, Sch Civil & Environm Engn, Ctr Technol Water & Wastewater, Sydney, NSW 2007, Australia
[5] Shanghai Univ, Sch Life Sci, Shanghai Key Lab Bioenergy Crops, Shanghai 200444, Peoples R China
[6] FuXing Senior High Sch, Shanghai 200434, Peoples R China
[7] QingHai Salt Lake Ind Co Ltd, Geermu 816000, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 249卷
基金：
中国国家自然科学基金;
关键词：
Membrane fouling; Magnetic powder; Microbial community; Adsorption; Bioflocculation; COMMUNITY STRUCTURE; FE3O4; NANOPARTICLES; ACTIVATED-SLUDGE; CAKE SLUDGE; PERFORMANCE; INSIGHT; REACTOR;
D O I：
10.1016/j.biortech.2017.10.027
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
This study aims to investigate the usefulness of magnetic powder addition in membrane bioreactors (MBRs) for membrane fouling mitigation and its effect on microbial community and composition. The comparison between the two MBRs (one with magnetic powder (MAS-MBR) and one without magnetic powder (C-MBR)) was carried out to treat synthetic municipal wastewater. Results showed that bioflocculation and adsorption of magnetic powder contributed only minimally to membrane fouling mitigation while the slower fouling rate might be ascribed to magnetic bio-effect. The macromolecules (larger than 500 kDa and 300-500 kDa) of soluble microbial product from the MAS-MBR were reduced by 24.06% and 11.11%, respectively. High-throughput sequencing demonstrated the most abundant genera of biofilm sludge indicated lower abundance in bulk sludge from the MAS-MBR compared to the C-MBR. It is possible that less membrane fouling is connected to reductions in large molecules and pioneer bacteria from bulk sludge.
引用
收藏
页码：377 / 385
页数：9
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