The effect of quorum sensing and extracellular proteins on the microbial attachment of aerobic granular activated sludge
The effect of quorum sensing and extracellular proteins on the microbial attachment of aerobic granular activated sludge
复制标题
群体感应和胞外蛋白对好氧颗粒活性污泥微生物附着的影响
DOI：
10.1016/j.biortech.2013.10.097
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发表时间：
2014-01-01
影响因子：
11.4
通讯作者：
Zhu, Jianrong
中科院分区：
文献类型：
--
作者：
Lv, Junping;Wang, Yaqin;Zhu, Jianrong
研究了群体感应(QS)阻断剂香兰素和蛋白酶K对好氧颗粒活性污泥(AGAS)微生物附着的影响。结果表明，香兰素和蛋白酶K均能降低AGAS的附着能力，两者联合使用对降低AGAS的附着生物量更为有效。在香草醛和蛋白酶K的存在下，N-酰基高丝氨酸内酯(AHLS)和胞外蛋白的含量降低。此外，还发现胞外蛋白可以促进Agas的微生物附着，AHLS介导的QS可能通过调节胞外蛋白参与AGAS的微生物附着。本研究从生物膜的角度提出了QS和胞外蛋白在AGAS生物膜形成过程中的重要作用。(C)2013爱思唯尔有限公司。保留所有权利。
In this study, vanillin, a quorum sensing (QS) blocker, and proteinase K were employed to investigate the effect of QS and extracellular proteins on the microbial attachment of aerobic granular activated sludge (AGAS). Results clearly showed that both vanillin and proteinase K could reduce attachment potential of AGAS, and the combined use of them was more effective in reducing attachment biomass of AGAS. The contents of N-acylhomoserine lactones (AHLs) and extracellular proteins were reduced in the presence of vanillin and proteinase K. Besides, it was found that extracellular proteins could promote microbial attachment of AGAS, and it was also revealed that AHLs-mediated QS might be involved in microbial attachment of AGAS through the regulation of extracellular proteins. This study suggested that both QS and extracellular proteins might play important roles in the development of "AGAS biofilm" from the perspective of the biofilm. (C) 2013 Elsevier Ltd. All rights reserved.