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首页> 外文期刊>Environmental Science & Technology >Fungal Quorum Quenching: A Paradigm Shift for Energy Savings in Membrane Bioreactor (MBR) for Wastewater Treatment
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Fungal Quorum Quenching: A Paradigm Shift for Energy Savings in Membrane Bioreactor (MBR) for Wastewater Treatment

机译:真菌群体淬灭:膜生物反应器(MBR)中用于废水处理的节能模式的转变

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摘要

In the last 30 years, the use of membrane bioreactors (MBRs) for advanced wastewater treatment and reuse have been expanded continuously, but they still suffer from excessive energy consumption resulting from the intrinsic problem of membrane biofouling. One of the major causes of biofouling in MBRs is bacterial quorum sensing (QS) via N-acylhomoserine ' lactones (AHLs) and/or autoinducer-2 (AI-2), enabling intra- and interspecies communications, respectively. In this study, we demonstrate mat farnesol can substantially mitigate membrane biofouling in a MBR due to its quorum quenching (QQ) activity. When Candida albicans (a famesol producing fungus) entrapping polymer beads (AEBs) were placed in the MBR, the rate of transmembrane pressure (TMP) rise-up was substantially decreased, even for lower aeration intensities. This finding corresponds to a specific aeration energy savings of approximately 40% (25% through the physical washing effect and a further 15% through the biological QQ, effect of AEBs) compared to conventional MBRs without AEBs. A real-time RT-qPCR analysis revealed that farnesol secreted from C albicans mitigated the biofilm formation in MBRs via the suppression of AI-2 QS. Successful control of biofouling and energy savings through fungal-to-bacterial QQ, could be expanded to the plant scale for MBRs in wastewater treatment with economic feasibility.
机译:在过去的30年中,膜生物反应器(MBR)用于高级废水处理和回用的应用不断扩大,但是由于膜生物污染的内在问题,它们仍然遭受能耗过大的困扰。 MBRs中生物污染的主要原因之一是通过N-酰基高丝氨酸内酯(AHLs)和/或autoinducer-2(AI-2)引起的细菌群体感应(QS),从而分别实现了种内和种间通信。在这项研究中,我们证明了法呢醇由于其群体猝灭(QQ)活性,可以大大减轻MBR中的膜生物污染。当将截留白色念珠菌(产真菌的真菌)的聚合物珠粒(AEB)放入MBR时,即使通气强度降低,跨膜压力(TMP)的上升速率也显着降低。与没有AEB的传统MBR相比,此发现对应的特定充气节能量约为40%(通过物理洗涤效果可节省25%,通过生物QQ(AEB的效果)可进一步节省15%)。实时RT-qPCR分析显示,白色念珠菌分泌的法尼醇通过抑制AI-2 QS减轻了MBR中生物膜的形成。通过真菌对细菌的QQ成功控制生物结垢和节能,可以扩大到废水处理中MBR的工厂规模,并且具有经济可行性。

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  • 来源
    《Environmental Science & Technology》 |2016年第20期|10914-10922|共9页
  • 作者单位

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

    Department of Environmental Engineering, Yonsei University, Wonju, 26493, Republic of Korea;

    Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea;

    Department of Biomedicinal Science and Biotechnology, Paichai University, Daejeon 35345, Republic of Korea;

    Department of Biomedicinal Science and Biotechnology, Paichai University, Daejeon 35345, Republic of Korea;

    School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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