Analysis on methane production from various coal slime fermentations based on metagenomics

Hongyu Guo, Wenqing Jia, Zhenhong Chen*, Yidong Cai, Yongjun Wang, Shufeng Zhao, Weizhong Zhao

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Metagenomic sequencing technology was applied to evaluate differences in the anaerobic fermentation process of coal slimes by analyzing microbial diversity, functional activity structure, and cooperative relationship during the anaerobic fermentation of coal slimes with different coal ranks. The obtained results showed that the production of biomethane from coal slime was decreased by increasing metamorphism degree. Internal reason was higher abundance of microbial community in low rank coal slimes compared to that in high rank coal which had higher activity in the gene expression of key steps such as hydrolysis and acidification, methanation and the production of hydrogen and acetic acid. Acetic acid decarboxylation and CO2 reduction are two key pathways of methanation process. At the same time, K11261 (formylmethanofuran dehydrogenase subunit) and K01499 (methenyltetrahydromethanopterin cyclohydrolase) genes were further enriched in low rank slime systems, which enhanced the proportion of CO2 reduction in methanation pathway and was beneficial to biomethane production. Research revealed the roles of different coal slime ranks in biomethane production process and is considered as an important reference significance for further exploration of coal slime resource utilization.
Original languageEnglish
Article number118058
JournalJournal of Environmental Management
Volume343
Number of pages9
ISSN0301-4797
DOIs
Publication statusPublished - 2023

Keywords

  • Coal slime
  • Anaerobic fermentation
  • Microflora structure
  • Gene expression
  • Metabolic pathways

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