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首页> 外文期刊>Environmental Science & Technology >Stopping Autoinducer-2 Chatter by Means of an Indigenous Bacterium {Acinetobacter sp. DKY-1): A New Antibiofouling Strategy in a Membrane Bioreactor for Wastewater Treatment
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Stopping Autoinducer-2 Chatter by Means of an Indigenous Bacterium {Acinetobacter sp. DKY-1): A New Antibiofouling Strategy in a Membrane Bioreactor for Wastewater Treatment

机译：通过土著细菌{Acinetobacter sp。 DKY-1）：膜生物反应器中用于污水处理的新抗污垢策略

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摘要

Bacterial quorum quenching (QQ) by means of degrading signaling molecules has been applied to antibiofouling strategies in a membrane bioreactor (MBR) for wastewater treatment. However, the target signaling molecules have been limited to N -acyl homoserine lactones participating in intraspecies quorum sensing. Here, an approach to disrupting autoinducer-2 (AI-2) signaling molecules participating in interspecies quorum sensing was pursued as a next-generation antibiofouling strategy in an MBR for wastewater treatment. We isolated an indigenous QQ bacterium (Acinetobacter sp. DKY-1) that can attenuate the expression of the quorum-sensing (QS) response through the inactivation of an autoinducer-2 signaling molecule, 4,5-dihydroxy-2,3-pentanedione (DPD), among four kinds of autoinducer-2 QS bacteria. DKY-1 released AI-2 QQ compounds, which were verified to be hydrophilic with a molecular weight of <400 Da. The addition of DKY-1 entrapping beads into an MBR significantly decreased DPD concentration and remarkably reduced membrane biofouling. This new approach, combining molecular biology with wastewater engineering, could enlarge the range of QQ-MBR for antibiofouling and energy savings in the field of wastewater treatment.
机译：通过降解信号分子的细菌群体猝灭（QQ）已被应用于膜生物反应器（MBR）的废水处理中的抗生物污垢策略。然而，靶信号传导分子已经限于参与种内群体感应的N-酰基高丝氨酸内酯。在这里，寻求一种破坏参与种间群体感应的自诱导物2（AI-2）信号分子的方法，作为MBR中用于废水处理的下一代抗生物污染策略。我们分离了一种本地QQ细菌（不动杆菌属DKY-1），该细菌可以通过使autoinducer-2信号分子4,5-二羟基2失活来减弱群体感应（QS）反应的表达， 3-pentanedione（DPD），在四种autoinducer-2 QS细菌中。 DKY-1释放了AI-2 QQ化合物，这些化合物经证实具有亲水性，分子量<400 Da。将DKY-1截留珠添加到MBR中可显着降低DPD浓度并显着减少膜生物结垢。这种将分子生物学与废水工程相结合的新方法可以扩大QQ-MBR的范围，以用于废水处理领域的抗生物结垢和节能。

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  • 来源
    《Environmental Science & Technology》 |2018年第11期|6237-6245|共9页
  • 作者

    Kibaek Lee; Yea-Won Kim; Seonki Lee; Sang Hyun Lee; Chang Hyun Nahm; Hyeokpil Kwon; Pyung-Kyu Park; Kwang-Ho Choo; Ismail Koyuncu; Anja Drews; Chung-Hak Lee; Jung-Kee Lee;

  • 作者单位

    School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Republic of Korea,Advanced Institute of Water Industry, Kyungpook National University, Daegu 41566, 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;

    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;

    Advanced Institute of Water Industry, Kyungpook National University, Daegu 41566, Republic of Korea,Department of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;

    Department of Environmental Engineering, Istanbul Technical University, Istanbul 34469, Turkey;

    School of Life Science Engineering (Engineering II), HTW Berlin-University of Applied Sciences, Berlin 12459, Germany;

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

    Department of Biomedicinal Science and Biotechnology, Paichai University, Daejeon 35345, 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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