Effects of solids retention time on the performance and microbial community structures in membrane bioreactors treating synthetic oil refinery wastewater

被引：50

作者：

Yu, Liangzheng ^{[1
]}

Yang, Yinhai ^{[1
]}

Yang, Bin ^{[1
]}

Li, Zhongjian ^{[1
]}

Zhang, Xingwang ^{[1
]}

Hou, Yang ^{[1
]}

Lei, Lecheng ^{[1
]}

Zhang, Dongxiao ^{[2
]}

机构：

[1] Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China

[2] Henan Tianguan Grp Co Ltd, Nanyang 473000, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2018年 / 344卷

基金：

中国国家自然科学基金;

关键词：

MBR; Sludge characteristic; Membrane fouling; Extracellular polymeric substances; Nitrification; EXTRACELLULAR POLYMERIC SUBSTANCES; ACTIVATED-SLUDGE; FOULING CHARACTERISTICS; MBR; BACTERIA; PHARMACEUTICALS; FILTERABILITY; ANTIBIOTICS; DEGRADATION; BIOFILM;

D O I：

10.1016/j.cej.2018.03.073

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The treatment of oil refinery wastewater has attracted a significant attention for containing hazardous pollutants and causing adverse impacts on the environment. Three submerged membrane bioreactors (MBRs) treating synthetic oil refinery wastewater containing aromatic hydrocarbons including toluene and anthracene were operated at the different solids retention times (SRT) (10, 30 and 60 days) to investigate pollutants removals and membrane fouling characteristics. Mycobacterium and Sphingomonas capable of degrading aromatic compounds found in MBRs may contribute to high removal efficiencies (> 99%) of aromatic hydrocarbons at three SRTs. It is observed that nitrifying bacteria at short SRT of 10 days was in low abundance, and the resulting removal efficiency of NH4+-N was only 79%, which is much lower than those in MBRs at the SRTs of 30 and 60 days (> 97%). Severe membrane fouling and the minimal membrane fouling was observed at the SRT of 10 and 30 days respectively. Additionally, the investigation of loosely bound extracellular polymeric substances (LB-EPS) content including the protein and polysaccharide induced by SRT indicated that high LB-EPS concentration at the SRT of 10 days caused severe membrane fouling. The relative abundances of the biofilm-forming bacteria Deinococcus and the bulking and foaming bacteria Caldilineaceae found in three MBRs correlated well with membrane fouling rate.

引用

页码：462 / 468

页数：7

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