Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies

Direstiyani, Lucky Caesar; Inoue, Daisuke; Ike, Michihiko

doi:https://doi.org/10.1016/j.jece.2026.124242

Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies

Direstiyani, Lucky Caesar; Inoue, Daisuke; Ike, Michihiko

Journal of Environmental Chemical Engineering, 2026, 14(5), 124242

アクセス数:161件（2026-11-03 23:45 集計）

固定URL: https://hdl.handle.net/11094/106297

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タイトル	Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies
著者	著者名 Direstiyani, Lucky Caesar
	NRID 1000070448091 1000070448091 ORCID 0000-0002-9216-8198 0000-0002-9216-8198 researchmap permalink DaisukeINOUE DaisukeINOUE Scopus Author ID 55723196300 55723196300 著者名 Inoue, Daisuke
	NRID 1000040222856 1000040222856 ORCID 0000-0001-6237-8103 0000-0001-6237-8103 researchmap permalink ikemichi ikemichi Scopus Author ID 55551254800 55551254800 著者名 Ike, Michihiko
キーワード等	electromethanogenesis
	methane production
	methanogenesis
	microbial electrolysis cell
	microbial interactions
	start-up
内容	Direstiyani L.C., Inoue D., Ike M.. Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies. Journal of Environmental Chemical Engineering 14(5), 124242 (2026); https://doi.org/10.1016/j.jece.2026.124242.
抄録	Fluctuations in generated renewable energy raise serious concerns that affect electrical grid stability. It would be detrimental if surplus generated energy is not utilized at its full capacity. Energy sector integration is made possible by electromethanogenesis (EM), a power-to-gas technology, that could alleviate these issues along with having great economic and environmental benefits. The EM system, which converts CO₂ into readily storable CH₄, has become a viable and economical solution for storing excess renewable electricity, promoting carbon neutrality, and producing high-purity biomethane. Nevertheless, despite its potential, several limitations still hinder the practical implementation of EM, including slow start-up, inefficient electron transfer, biofilm instability, substrate competition, and operational constraints. This review highlights multiple constraints that must be alleviated to achieve the rapid establishment of an EM system with a high rate of CH₄ generation. The fundamental drivers governing microbial community structure, electron transfer, and EM system stability are discussed. Microbial interactions, particularly syntrophy and competition, are critical determinants of EM efficiency. Additionally, key strategies to accelerate the start-up period and promote EM performance, including bioaugmentation with pure or mixed inocula to stimulate functional consortia establishment, curtailed electricity to stimulate robust biofilm formation and higher CH₄ generation, and alternating polarity to enrich electroactive consortia, facilitating direct interspecies electron transfer-driven syntrophic interactions, are introduced. Integrating these insights is expected to facilitate the advancement of rapid and efficient EM systems and provide directions for future research to optimize EM system performance.
出版者	Elsevier Ltd
収録物名	Journal of Environmental Chemical Engineering
巻(号)	14(5)
ページ	124242
刊行年月	2026-07-28
言語	英語
ハンドルURL	https://hdl.handle.net/11094/106297
PISSN	22132929
eISSN	22133437
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1016/j.jece.2026.124242
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Journal of Environmental Chemical Engineering. 2026, 14(5), p. 124242
DC.title	Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies
DC.creator	Direstiyani, Lucky Caesar
	Inoue, Daisuke
	Ike, Michihiko
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2026-07-28
DC.identifier	https://doi.org/10.1016/j.jece.2026.124242
DC.subject	electromethanogenesis
	methane production
	methanogenesis
	microbial electrolysis cell
	microbial interactions
	start-up
DC.description	Direstiyani L.C., Inoue D., Ike M.. Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies. Journal of Environmental Chemical Engineering 14(5), 124242 (2026); https://doi.org/10.1016/j.jece.2026.124242.
DCTERMS.abstract	Fluctuations in generated renewable energy raise serious concerns that affect electrical grid stability. It would be detrimental if surplus generated energy is not utilized at its full capacity. Energy sector integration is made possible by electromethanogenesis (EM), a power-to-gas technology, that could alleviate these issues along with having great economic and environmental benefits. The EM system, which converts CO₂ into readily storable CH₄, has become a viable and economical solution for storing excess renewable electricity, promoting carbon neutrality, and producing high-purity biomethane. Nevertheless, despite its potential, several limitations still hinder the practical implementation of EM, including slow start-up, inefficient electron transfer, biofilm instability, substrate competition, and operational constraints. This review highlights multiple constraints that must be alleviated to achieve the rapid establishment of an EM system with a high rate of CH₄ generation. The fundamental drivers governing microbial community structure, electron transfer, and EM system stability are discussed. Microbial interactions, particularly syntrophy and competition, are critical determinants of EM efficiency. Additionally, key strategies to accelerate the start-up period and promote EM performance, including bioaugmentation with pure or mixed inocula to stimulate functional consortia establishment, curtailed electricity to stimulate robust biofilm formation and higher CH₄ generation, and alternating polarity to enrich electroactive consortia, facilitating direct interspecies electron transfer-driven syntrophic interactions, are introduced. Integrating these insights is expected to facilitate the advancement of rapid and efficient EM systems and provide directions for future research to optimize EM system performance.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
DC.format	106297
citation_title	Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies
citation_author	Direstiyani, Lucky Caesar
	Inoue, Daisuke
	Ike, Michihiko
citation_publisher	Elsevier Ltd
citation_language	英語
citation_date	2026-07-28
citation_journal_title	Journal of Environmental Chemical Engineering
citation_volume	14
citation_issue	5
citation_firstpage	124242
citation_doi	https://doi.org/10.1016/j.jece.2026.124242
citation_public_url	https://hdl.handle.net/11094/106297

Electromethanogenesis for efficient CO₂ conversion to CH₄ generation: Fundamental drivers, microbial interactions, and improvement strategies

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