Insights into the effects of carbon source on sequencing batch reactors: Performance, quorum sensing and microbial community.
Insights into the effects of carbon source on sequencing batch reactors: Performance, quorum sensing and microbial community.
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DOI：
10.1016/j.scitotenv.2019.07.191
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Songya Li;X. Fei;Lingyun Cao;Yongzhi Chi
中科院分区：
文献类型：
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作者：
Songya Li;X. Fei;Lingyun Cao;Yongzhi Chi
研究了碳源对序批式反应器的运行性能、群体感应(QS)和微生物群落的影响。在所选择的碳源乙酸钠(R1)、葡萄糖(R2)、淀粉(R3)和吐温80(R4)中，乙酸钠是去除营养物质的最佳碳源，淀粉有利于诱导污泥膨胀，吐温80有利于胞外聚合物(EPS)的产生和微小微丝虫的增殖。此外，四个反应器中污泥沉降性与颗粒大小线性相关的R2值大小顺序为：R1 >； R2 >； R3 >； R4。此外，人相关分析表明，在不同碳源的反应器中观察到了各种显著的相关性，QS主要调节EPS的产生和组成。高通量测序分析表明碳源影响微生物群落，典型对应分析结果表明QS与微生物群落有关。推测微生物群落与QS之间的相互作用影响系统性能。
Effects of carbon source on the performance, quorum sensing (QS) and microbial communities in the sequencing batch reactors were investigated in this work. Among the chosen carbon source, sodium acetate (R1), glucose (R2), starch (R3) and Tween 80 (R4), sodium acetate was the best carbon source for nutrient removal, while starch was favorable for inducing the sludge bulking, and Tween 80 was beneficial to the production of extracellular polymeric substances (EPS) and proliferation ofMicrothrix parvicella. Additionally, the R2value of linear correlation between sludge settleability and particle size in four reactors followed an order of R1 > R2 > R3 > R4. Moreover, Person correlation analysis showed that various significant correlations were observed in reactors fed with different carbon sources and the QS mainly mediated the production and component of EPS. High-throughput sequencing analysis revealed that the carbon source affected microbial communities and the Canonical correspondence analysis results indicated that QS related to microbial communities. It was inferred that the interactions between microbial communities and QS affected system performance.