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Oleate Impacts on Acetoclastic and Hydrogenotrophic Methanogenesis under Mesophilic and Thermophilic Conditions.

ABSTRACT: This study investigated oleate inhibition concentration on mesophilic and thermophilic sludge by utilizing acetate and H2/CO2 (80:20, v/v) as substrate, respectively. In addition, another batch experiment was carried out to explore the influence of oleate loads (mM-oleate/g-VS) on methane production. Generally, the mesophilic anaerobic system was more stable than the thermophilic system, which embodied higher microbial abundance, higher methane yield, and higher oleate tolerance. Furthermore, this study provides a possible methanogenic pathway impacted by oleate under mesophilic and thermophilic conditions according to functional microbial composition. Lastly, this paper provides noticeable and avoidable oleate concentrations and loads under different experimental conditions as a guide for future anaerobic bioreactors of lipidic waste biodegradation.

SUBMITTER: Li X 

PROVIDER: S-EPMC9960261 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Oleate Impacts on Acetoclastic and Hydrogenotrophic Methanogenesis under Mesophilic and Thermophilic Conditions.

Li Xiang X   Yang Yang Y   Lu Chen-Shun CS   Kobayashi Takuro T   Kong Zhe Z   Hu Yong Y  

International journal of environmental research and public health 20230215 4

This study investigated oleate inhibition concentration on mesophilic and thermophilic sludge by utilizing acetate and H<sub>2</sub>/CO<sub>2</sub> (80:20, <i>v</i>/<i>v</i>) as substrate, respectively. In addition, another batch experiment was carried out to explore the influence of oleate loads (mM-oleate/g-VS) on methane production. Generally, the mesophilic anaerobic system was more stable than the thermophilic system, which embodied higher microbial abundance, higher methane yield, and high  ...[more]