On-site CO2 bio-sequestration in anaerobic digestion: Current status and prospects

Suyun Xu, Zihao Qiao, Liwen Luo, Yongqi Sun, Jonathan Woon Chung Wong*, Xueyu Geng, Jing Ni

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

24 Citations (Scopus)

Abstract

The advantages of anaerobic digestion (AD) technology in organic solid waste treatment for bioenergy recovery are evidenced in worldwide. Recently, more attention has been paid to on-site biogas research, as well as biogenic CO2 sequestration from AD plant, to promote “carbon neutral”. Single-phase and two-phase AD system can be incorporated with various CO2 bioconversion technologies through H2 mediated CO2 bioconversion (in-situ and ex-situ biogas upgrading), or other emerging strategies for CO2 fixation without exogenous H2 injection; these include in-situ direct interspecies electron transfer reinforcement, electromethanogenesis, and off-gas reutilization. The existing and potential scenarios for on-site CO2 bio-sequestration within the AD framework are reviewed from the perspectives of metabolic pathways, functional microorganisms, the limitations on reaction kinetics. This review concluded that on-site CO2 bio-sequestration is a promising solution to reduce greenhouse gas emissions and increase renewable energy recovery.

Original languageEnglish
Article number125037
Number of pages14
JournalBioresource Technology
Volume332
Early online date23 Mar 2021
DOIs
Publication statusPublished - Jul 2021

Scopus Subject Areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

User-Defined Keywords

  • Anaerobic digestion
  • Biogas upgrading
  • CO2 sequestration
  • Hydrogen
  • Methanogenesis

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