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Effects of exogenous quorum quenching on microbial community dynamics and biofouling propensity of activated sludge in MBRs
Biochemical Engineering Journal ( IF 3.9 ) Pub Date : 2020-04-01 , DOI: 10.1016/j.bej.2020.107534
Yichen Ouyang , Yi Hu , Jinhui Huang , Yanling Gu , Yahui Shi , Kaixin Yi , Ying Yang

Abstract 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 anti-biofouling, 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.

中文翻译:

外源群体淬灭对 MBR 中活性污泥微生物群落动态和生物污染倾向的影响

摘要 最近,细菌群体淬灭 (QQ) 已被证明是一种减轻膜生物反应器 (MBR) 生物污染的新方法。有关微生物群落的信息对于 QQ 策略的开发至关重要。此外,微生物群落的变化可能会影响污泥的生物污染倾向。在这项研究中,研究了外源 QQ 对 MBR 中微生物群落动态的影响,以及活性污泥的生物污染倾向。添加外源QQ菌的QQ MBR表现出更好的抗生物污垢,而废水处理性能与对照MBR相比几乎没有差异。至于微生物群落,外源QQ对细菌多样性和群落组成都有影响,特别是对群体感应(QS)和原位QQ细菌。外源QQ可在短期内降低污泥自身QQ能力,增强其生物污染倾向。这些发现为QQ战略的发展提供了新的见解。
更新日期:2020-04-01
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