Effect of solids retention time on antibiotics removal performance and microbial communities in an A/O-MBR process

被引：142
作者：
Xia, Siqing [1 ]
Jia, Renyong [1 ,2 ]
Feng, Fan [3 ]
Xie, Kang [1 ]
Li, Haixiang [4 ]
Jing, Danfeng [1 ]
Xu, Xiaotian [1 ]
机构：
[1] Tongji Univ, State Key Lab Pollut Control & Resource Reuse, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China
[2] Shanghai Urban Construct Design & Res Inst, Shanghai 200125, Peoples R China
[3] AECOM Technol Incorp, Honolulu, HI 96826 USA
[4] Guilin Univ Technol, Coll Environm Sci & Engn, Guilin 541004, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 106卷
基金：
国家高技术研究发展计划(863计划);
关键词：
Antibiotics; Membrane bioreactor; Solids retention time; Removal performance; Microbial community; MEMBRANE BIOREACTOR; WASTE-WATER; TETRACYCLINE; BIODEGRADABILITY; RESISTANCE; BACTERIA;
D O I：
10.1016/j.biortech.2011.11.112
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The effect of solids retention time on reactor performance and microbial community composition in anoxic/aerobic membrane bioreactors (A/O-MBR) were investigated in this study. Experimental results showed high removal efficiencies of conventional pollutants. Antibiotics removal efficiencies were obviously affected by SRT changes. Longer SRT (above 30 days) was proved to be suitable operational condition for antibiotics removal. Denaturing gradient gel electrophoresis (DGGE) and clone library analysis revealed that bacteria belong to Betaproteobacteria and Gammaproteobacteria were the dominant species during wastewater treatment and antibiotics removal. SRT significantly influenced the relative numbers of nitrifying bacteria. Removal efficiency of total nitrogen (TN) decreased when SRT was 3 days, because nitrogen loading exceeded the denitrification ability of the reactors. Unlike tet C and tet E genes, sulfa antibiotics resistance gene presented a decreasing tendency with the decrease of SRT, and finally affected sulfa antibiotics removal efficiencies. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：36 / 43
页数：8
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