In situ Biogas Upgrading by CO2-to-CH4 Bioconversion

Shanfei Fu, Irini Angelidaki, Yifeng Zhang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Upgrading biogas into biomethane broadens its applications and increases the value of biogas. Among these, in situ CO2-to-CH4 bioconversion can capture endogenous CO2 directly from the biogas reactor, is easy to operate, and provides infrastructure for renewable electricity storage.

Although promising, several intrinsic challenges need to be addressed to move in situ upgrading technologies closer to scaled-up application.

In situ CO2-to-CH4 bioconversion powered by renewable electricity could integrate multidisciplinary approaches including wind or solar energy technology, P2G technology, anaerobic digestion technology, and biogas upgrading technology.

Bioelectrochemical systems are a potential technology for biogas upgrading and storing discontinuous wind/solar energy. However, their operating mechanism and scale-up feasibilities need to be further explored.
Original languageEnglish
JournalTrends in Biotechnology
ISSN0167-7799
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • in situ biogas upgrading
  • bioconversion
  • renewable electricity
  • mechanisms
  • challenges

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