Journal
BIOCHEMICAL ENGINEERING JOURNAL
Volume 157, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.bej.2020.107534
Keywords
Membrane bioreactor; Quorum sensing; Exogenous quorum quenching; Microbial community; Biofouling
Funding
- National Natural Science Foundation of China [51578222, 51178172, 51521006, 51378190]
- Project of Chinese Ministry of Education [113049A]
- Research Fund for the Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
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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.
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