Effects of exogenous quorum quenching on microbial community dynamics and biofouling propensity of activated sludge in MBRs

被引：30
|
作者：
Ouyang, Yichen [1 ,2 ]
Hu, Yi [1 ,2 ,3 ]
Huang, Jinhui [1 ,2 ]
Gu, Yanling [4 ]
Shi, Yahui [1 ,2 ]
Yi, Kaixin [1 ,2 ]
Yang, Ying [1 ,2 ]
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China
[3] Changsha Zooml Environm Ind Co Ltd, Changsha 410006, Hunan, Peoples R China
[4] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China
来源：
BIOCHEMICAL ENGINEERING JOURNAL | 2020年 / 157卷
基金：
中国国家自然科学基金;
关键词：
Membrane bioreactor; Quorum sensing; Exogenous quorum quenching; Microbial community; Biofouling; EXTRACELLULAR POLYMERIC SUBSTANCES; WASTE-WATER TREATMENT; MEMBRANE BIOREACTORS MBRS; REACTOR PERFORMANCE; BACTERIA; EPS; DEWATERABILITY; IDENTIFICATION; REMOVAL; BIOFILM;
D O I：
10.1016/j.bej.2020.107534
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Recently, bacterial quorum quenching (QQ) has been proven as a novel approach for biofouling mitigation in membrane bioreactors (MBRs). The information about microbial community is vital for the development of QQ strategies. Also, the change of microbial community may affect the biofouling propensity of sludge. In this study, the effects of exogenous QQ on microbial community dynamics in MBRs were investigated, along with biofouling propensity of activated sludge. QQ MBR dosed with exogenous QQ bacteria exhibited a better antibiofouling, whereas the wastewater treatment performance was almost no difference compared with control MBR. As for the microbial community, exogenous QQ had an impact on both the bacterial diversities and community composition, especially for the quorum sensing (QS) and QQ bacteria in situ. The addition of exogenous QQ could reduce the QQ ability of sludge itself in the short term, and enhance its biofouling propensity. These findings provided new insights for the development of QQ strategies.
引用
收藏
页数：10
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