Unraveling Anaerobic Digestion Foaming via Association between Bacterial Metabolism and Variations in Microbiota,ACS ES&T Engineering

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Unraveling Anaerobic Digestion Foaming via Association between Bacterial Metabolism and Variations in Microbiota
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2021-04-25 , DOI: 10.1021/acsestengg.1c00018
Jian-Lu Duan ₁ , Yue Feng ₁ , Li-Juan Feng _{1,

2} , Jing-Ya Ma ₁ , Xiao-Dong Sun ₁ , Qian Wang ₁ , Xiang-Yu Li ₁ , Fu Xiao ₁ , Peng-Cheng Xu ₁ , Ru-Kang Tian ₁ , Wen-Lin Sun ₁ , Xian-Zheng Yuan ₁

Affiliation

Foaming in anaerobic digesters is considered to be a global concern because of its significant impact on process efficiency and operational costs. Although the importance of organic loading rate on anaerobic foaming is widely recognized, there is little information on key bacteria among the hundreds of species that induce foaming, especially the metabolite–microbiota correlation that influences foaming in anaerobic digesters. This study demonstrated that the organic loading rate promoted foaming and decreased the performance of bench-scale batch digesters. Metabolomic analysis revealed distinct changes in the metabolic phenotype, including short-chain fatty acids and amino acids, decreasing surface tension and inducing foaming. Furthermore, correlation analysis revealed that Clostridium clusters, Sporolactobacillus, and Bacteroides were the primary microbes that contributed to the metabolite foaming incidents. Thus, the findings of this study elucidate the complex formation of foaming in anaerobic digestion and provide an effective early warning to control foaming in full-scale digesters.

中文翻译：

通过细菌代谢与微生物群变化之间的关联解开厌氧消化泡沫

厌氧消化器中的发泡被认为是一个全球性的问题，因为它对工艺效率和运营成本产生重大影响。尽管有机负荷率对厌氧起泡的重要性已得到广泛认可，但在数百种诱导起泡的物种中，关于关键细菌的信息很少，尤其是影响厌氧消化器起泡的代谢物-微生物群的相关性。该研究表明，有机负载率促进了发泡并降低了台式间歇式蒸煮器的性能。代谢组学分析揭示了代谢表型的明显变化，包括短链脂肪酸和氨基酸，降低表面张力并诱导起泡。此外，相关性分析表明，梭状芽孢杆菌集群，孢子乳杆菌和拟杆菌是导致代谢物起泡事件的主要微生物。因此，本研究的结果阐明了厌氧消化中泡沫的复杂形成，并为控制全尺寸消化器中的泡沫提供了有效的早期预警。

更新日期：2021-06-11

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