Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions

Zhang, Xingxing; Jiao, Pengbo; Wang, Yiwei; Dai, Yinying; Zhang, Ming; Wu, Peng; Ma, Liping

doi:10.1016/j.ese.2024.100440

Environmental Science and Ecotechnology

2024

DOI: 10.1016/j.ese.2024.100440

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Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions

Xingxing Zhang,

Pengbo Jiao,

Yiwei Wang

et al.

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Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄

Wu,

Zhang,

Yan

et al. 2024

Advanced Science

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The efficient co‐production of H2 and CH4 via anaerobic digestion (AD) requires separate stages, as it cannot yet be achieved in one step. Lactic acid bacteria (LAB) (Limosilactobacillus) release H2 and acetate by enhancing hydrolysis, potentially increasing CH4 production with simultaneous H2 accumulation. This study investigated the enhanced effect of one‐step co‐production of H2 and CH4 in AD by LAB and elucidated its enhancement mechanisms. The results showed that 236.3 times increase in H2 production and 7.1 times increase in CH4 production are achieved, resulting in profits of 469.39 USD. Model substrates lignocellulosic straw, sodium acetate, and H2 confirmes LAB work on the hydrolysis stage and subsequent sustainable volatile fatty acid production during the first 6 days of AD. In this stage, the enrichment of Limosilactobacillus carrying bglB and xynB, the glycolysis pathway, and the high activity of protease, acetate kinase, and [FeFe] hydrogenase, jointly achieved rapid acetate and H2 accumulation, driving hydrogenotrophic methanogenesis dominated. From day 7 to 24, with enriched Methanosarcina, and increased methenyltetrahydromethanopterin hydrogenase activity, continuously produced acetate led to the mainly acetoclastic methanogenesis shift from hydrogenotrophic methanogenesis. The power generation capacity of LAB‐enhanced AD is 333.33 times that of China's 24,000 m3 biogas plant.

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Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄

Wu,

Zhang,

Yan

et al. 2024

Advanced Science

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Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions

Cited by 1 publication

References 70 publications

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄

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Optimizing anaerobic digestion: Benefits of mild temperature transition from thermophilic to mesophilic conditions

Cited by 1 publication

References 70 publications

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H2 and CH4

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H2 and CH4

Contact Info

Product

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About

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄

Limosilactobacillus Regulating Microbial Communities to Overcome the Hydrolysis Bottleneck with Efficient One‐Step Co‐Production of H₂ and CH₄