Impact of the acetate/oleic acid ratio on the performance, quorum sensing, and microbial community of sequencing batch reactor system.
Impact of the acetate/oleic acid ratio on the performance, quorum sensing, and microbial community of sequencing batch reactor system.
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DOI：
10.1016/j.biortech.2019.122279
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发表时间：
2019
影响因子：
11.4
通讯作者：
Songya Li;X. Fei;Yongzhi Chi;Lingyun Cao
中科院分区：
文献类型：
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作者：
Songya Li;X. Fei;Yongzhi Chi;Lingyun Cao
研究了乙酸/油酸比例（80%/20%、60%/40%、40%/60%和20%/80%）对序批式反应器（SBR）运行性能、群体感应（QS）和微生物群落的影响。结果表明，NH+4-N的去除率不受乙酸/油酸比例的影响，而COD，总氮（TN）和PO 3 −4-P的去除率受到很大影响。随着油酸比的增加，污泥膨胀加剧，且与蛋白质/多糖呈显著正相关（p< 0.001）。QS与运行性能和污泥性质的相关性也被观察到。高通量测序表明，微生物的组成与不同的乙酸/油酸比例相当大的转变。此外，细菌属与SBR性能和QS的潜在相关性提出。本研究从微生物角度阐明了乙酸/油酸比例对SBR反应的影响，为全面认识碳源在污水处理中的重要作用提供了依据。
This study comprehensively investigated the impact of acetate/oleic acid ratios (80%/20%, 60%/40%, 40%/60%, and 20%/80%) on sequencing batch reactor (SBR) with respect to the variations in performance, quorum sensing (QS), and microbial community. Results showed that NH+4-N removal was not affected by the acetate/oleic acid ratios, while the COD, total nitrogen (TN), and PO3−4-P removal was considerably affected. The increasing oleic acid ratios led to severe sludge bulking, which was significantly positively correlated with proteins/polysaccharides (p< 0.001). The correlation of QS with the performance and sludge properties was also observed. High-throughput sequencing demonstrated that microbial compositions considerably shifted with varying acetate/oleic acid ratios. Moreover, the potential correlation of bacterial genera with the SBR performance and QS was proposed. This study elucidated the effect of acetate/oleic acid ratios on SBR from microbial viewpoint, which provided insights into fully understanding the essential roles of carbon source on wastewater treatment.