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首页> 外文期刊>RSC Advances >Biofouling control in a membrane filtration system by a newly isolated novel quorum quenching bacterium, Bacillus methylotrophicus sp. WY
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Biofouling control in a membrane filtration system by a newly isolated novel quorum quenching bacterium, Bacillus methylotrophicus sp. WY

机译：通过新孤立的新型Quorum猝灭细菌进行膜过滤系统中的生物污垢控制，芽孢杆菌甲基雌激素SP。 WY.

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摘要

During membrane processes of wastewater treatment, biofouling is a critical issue affecting membrane performance. Interspecies quorum quenching (QQ) by bacterial cells has been reported as a novel approach for mitigating the biofouling via restraining quorum sensing (QS), where secreted signaling molecules, e.g. , acyl homoserine lactones (AHLs) being essential for biofilm formation are degraded by QQ bacteria. Herein, we isolated a novel indigenous QQ bacterium, Bacillus methylotrophicus strain WY from real wastewater sludge for controlling membrane biofouling. Strain WY was successfully characterized for QS and QQ activity and possessed a wide-ranging activity for degrading AHLs. More than 90% degradation for C8-HSL, C10-HSL, C12-HSL, C14-HSL, 3-oxo-C6HSL, 3-oxo-C8HSL and 3-oxo-C12HSL were achieved. Further, sodium alginate beads immobilized strain WY cells were applied to the microfiltration process. Compared to the vacant beads, using the beads with stain WY increased membrane flux by 3 to 4 times, demonstrating excellent biofouling control ability of strain WY.
机译：在废水处理的膜过程中，生物污染是影响膜性能的关键问题。已经报告了细菌细胞的次脉冲猝灭（QQ）作为一种新的方法，用于通过约束法定感测（QS）来减轻生物污染，其中分泌的信号分子，例如分泌的信号分子。 ，对于生物膜形成是必需的酰基均静脉内酯（AHL）通过QQ细菌降解。在此，我们分离出一种新的土着QQ细菌，来自真正废水污泥的甲基硫菌菌株，用于控制膜生物污泥。应变WY成功地表征了QS和QQ活动，并具有降解AHL的广泛活动。实现了C8-HSL，C10-HSL，C12-HSL，C14-HSL，3-OXO-C6HSL，3-氧代-C8HSL和3-氧代C12HS1的90％以上。此外，将藻酸钠珠粒固定化菌株WY细胞应用于微滤过程。与空气珠子相比，使用污渍WY的珠子增加3至4倍，展示了菌株WY的优异生物污垢控制能力。

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