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Clean utilization of lignite to produce biomethane by optimizing the microbial community

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  • Yang, Lin
  • Zhang, Yongfeng
  • Hao, Zhifei
  • Ding, Daqian
  • Liu, Zhanying

Abstract

Optimization of microbial community is requisite to boost methane production from inferior coal biodegradation. Here is reported an efficient method of converting lignite into methane by microorganisms, which takes lignite as substrate and obtains efficient microbial flora from sludge by means of enrichment and domestication. The Single Factor Experiment and Response Surface Methodology were carried out to regulate the operating conditions and optimize the medium. The results showed that the optimized gas production of biodegradable lignite reached 79.29 mL (54.32% methane)/2 g coal, which is much higher than the other microbial conversions of lignite to methane reported to date. Furthermore, the combined most probable number counting method and high-throughput sequencing technique revealed that the main bacteria in the fermentation process are acid forming bacteria, sulfate-reducing bacteria and methanogenic bacteria. This study provides new insight into methanation and the clean utilization of lignite.

Suggested Citation

  • Yang, Lin & Zhang, Yongfeng & Hao, Zhifei & Ding, Daqian & Liu, Zhanying, 2023. "Clean utilization of lignite to produce biomethane by optimizing the microbial community," Energy, Elsevier, vol. 262(PB).
    • Handle: RePEc:eee:energy:v:262:y:2023:i:pb:s036054422202415x
    DOI: 10.1016/j.energy.2022.125533
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    1. Kevin A. Feeney & Louise L. Hansen & Marrit Putker & Consuelo Olivares-Yañez & Jason Day & Lorna J. Eades & Luis F. Larrondo & Nathaniel P. Hoyle & John S. O’Neill & Gerben van Ooijen, 2016. "Daily magnesium fluxes regulate cellular timekeeping and energy balance," Nature, Nature, vol. 532(7599), pages 375-379, April.
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    Cited by:

    1. Roy, Dibyendu, 2023. "Multi-objective optimization of biomass gasification based combined heat and power system employing molten carbonate fuel cell and externally fired gas turbine," Applied Energy, Elsevier, vol. 348(C).

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