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Effects of carbon source on methanogenic activities and pathways incorporating metagenomic analysis of microbial community

Journal Article


Abstract


  • In this study, the effects of four types of organic compounds (tryptone, acetate/propionate, glucose and ethanol) on methanogenesis, electron transfer processes and microbial community structure were examined. When tryptone and acetate/propionate were used, the dominant methanogenic pathway was aceticlastic methanogenesis and Methanosarcina was the most abundant methanogen. When glucose or ethanol were provided as the external carbon source, the aceticlastic and hydrogenotrophic pathways were utilised simultaneously, and Methanosarcina and Methanobacterium were enriched. However, the reactor fed with glucose was prone to acidification because volatile fatty acids accumulated in the medium, which inhibited methane synthesis. Geobacter was dominant in the reactor fed with ethanol and 45% of genes encoding pili synthesis were attributable to Geobacter, indicating that direct interspecies electron transfer may be a possible mechanism during syntrophic methanogenesis.

UOW Authors


  •   Xing, Lizhen (external author)
  •   Yang, Shuo (external author)
  •   Yin, Qidong (external author)
  •   Xie, Sihuang
  •   Strong, Peter J. (external author)
  •   Wu, Guangxue (external author)

Publication Date


  • 2017

Citation


  • Xing, L., Yang, S., Yin, Q., Xie, S., Strong, P. James. & Wu, G. (2017). Effects of carbon source on methanogenic activities and pathways incorporating metagenomic analysis of microbial community. Bioresource Technology, 244 (Part 1), 982-988.

Scopus Eid


  • 2-s2.0-85027832740

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/599

Number Of Pages


  • 6

Start Page


  • 982

End Page


  • 988

Volume


  • 244

Issue


  • Part 1

Place Of Publication


  • Netherlands

Abstract


  • In this study, the effects of four types of organic compounds (tryptone, acetate/propionate, glucose and ethanol) on methanogenesis, electron transfer processes and microbial community structure were examined. When tryptone and acetate/propionate were used, the dominant methanogenic pathway was aceticlastic methanogenesis and Methanosarcina was the most abundant methanogen. When glucose or ethanol were provided as the external carbon source, the aceticlastic and hydrogenotrophic pathways were utilised simultaneously, and Methanosarcina and Methanobacterium were enriched. However, the reactor fed with glucose was prone to acidification because volatile fatty acids accumulated in the medium, which inhibited methane synthesis. Geobacter was dominant in the reactor fed with ethanol and 45% of genes encoding pili synthesis were attributable to Geobacter, indicating that direct interspecies electron transfer may be a possible mechanism during syntrophic methanogenesis.

UOW Authors


  •   Xing, Lizhen (external author)
  •   Yang, Shuo (external author)
  •   Yin, Qidong (external author)
  •   Xie, Sihuang
  •   Strong, Peter J. (external author)
  •   Wu, Guangxue (external author)

Publication Date


  • 2017

Citation


  • Xing, L., Yang, S., Yin, Q., Xie, S., Strong, P. James. & Wu, G. (2017). Effects of carbon source on methanogenic activities and pathways incorporating metagenomic analysis of microbial community. Bioresource Technology, 244 (Part 1), 982-988.

Scopus Eid


  • 2-s2.0-85027832740

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/599

Number Of Pages


  • 6

Start Page


  • 982

End Page


  • 988

Volume


  • 244

Issue


  • Part 1

Place Of Publication


  • Netherlands