Cake layer bacterial communities during different biofouling stages in full-scale membrane bioreactors.
Cake layer bacterial communities during different biofouling stages in full-scale membrane bioreactors.
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DOI：
10.1016/j.biortech.2018.03.051
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发表时间：
2018-07
影响因子：
11.4
通讯作者：
Kazuki Takada;Toshihiko Shiba;Takako Yamaguchi;Yui Akane;Yoshinari Nakayama;S. Soda;D. Inoue;M. Ike
中科院分区：
文献类型：
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作者：
Kazuki Takada;Toshihiko Shiba;Takako Yamaguchi;Yui Akane;Yoshinari Nakayama;S. Soda;D. Inoue;M. Ike
为了控制膜生物反应器（MBR）中的生物污染，需要对膜表面形成的饼层中的细菌群落进行详细的了解。本研究旨在研究在日本某污水处理厂运行的全尺寸mbr中饼层细菌群落的动态，并确定负责饼层形成的关键细菌。采用16S rRNA基因扩增子测序法对不同污染条件下发生生物污染时饼层和活性污泥中的细菌群落进行分析。活性污泥中最占优势的菌门几乎都是变形杆菌门和拟杆菌门。相比之下，当饼层具有与活性污泥中不同的独特细菌群落时，无论污染条件如何，饼层中的firmicutes成员都具有高度优势。本研究首次报道了厚壁菌在整个生物污染过程中发挥重要作用。
A detailed understanding of the bacterial communities in the cake layers formed on the membrane surface is required to control biofouling in a membrane bioreactor (MBR). This study aimed to investigate the dynamics of the cake layer bacterial communities in full-scale MBRs operated in a wastewater treatment plant in Japan and to identify the key bacteria responsible for cake layer formation. The bacterial communities in the cake layer and the activated sludge were analyzed using 16S rRNA gene amplicon sequencing when biofouling occurred under different fouling conditions. The most dominant phyla in activated sludge were almost alwaysProteobacteriaandBacteroidetes. By contrast, when the cake layer had unique bacterial communities distinguishable from those in the activated sludge, members ofFirmicuteswere highly dominant in the cake layer, irrespective of the fouling conditions. This study reported for the first time thatFirmicutesplay an important role throughout the biofouling process.