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

Author

Listed:
  • Xiang Li

    (School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Yang Yang

    (School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Chen-Shun Lu

    (School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China)

  • Takuro Kobayashi

    (Material Cycles Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan)

  • Zhe Kong

    (School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

  • Yong Hu

    (School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, China
    Material Cycles Division, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan)

Abstract

This study investigated oleate inhibition concentration on mesophilic and thermophilic sludge by utilizing acetate and H 2 /CO 2 (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.

Suggested Citation

  • Xiang Li & Yang Yang & Chen-Shun Lu & Takuro Kobayashi & Zhe Kong & Yong Hu, 2023. "Oleate Impacts on Acetoclastic and Hydrogenotrophic Methanogenesis under Mesophilic and Thermophilic Conditions," IJERPH, MDPI, vol. 20(4), pages 1-12, February.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:4:p:3423-:d:1069626
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    References listed on IDEAS

    as
    1. Yong Hu & Haiyuan Ma & Jiang Wu & Takuro Kobayashi & Kai-Qin Xu, 2022. "Performance Comparison of CSTR and CSFBR in Anaerobic Co-Digestion of Food Waste with Grease Trap Waste," Energies, MDPI, vol. 15(23), pages 1-11, November.
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