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水素・二酸化炭素駆動型ガス発酵におけるアセトゲン性Clostridium種の可能性と課題

Promise and pitfalls of acetogenic Clostridium species for hydrogen and carbon dioxide-driven gas fermentation (原題)

Riccardo Raspone, Giacomo Antonicelli, Fabrizio Pirri, V. Agostino

Frontiers in Microbiology📚 査読済 / ジャーナル2026-11-02#CCUS
DOI: 10.3389/fmicb.2026.1953200
原典: https://doi.org/10.3389/fmicb.2026.1953200
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🤖 gxceed AI 要約

日本語

本ミニレビューは、嫌気性アセトゲン菌、特にClostridium種を用いたCO2/H2駆動型ガス発酵の現状を整理する。CO・合成ガス系に比べ研究が限られるCO2リッチ排ガスの資源化経路に焦点を当て、実験室規模での最高性能、代謝制約、宿主選定と操作条件の枠組みを示す。菌株開発とプロセス最適化の進展を通じ、カーボンネガティブなバイオ製造へのスケールアップ可能性を論じる。

English

This mini-review surveys H2/CO2-driven gas fermentation by acetogenic Clostridium species as a carbon capture and utilization route for CO2-rich industrial emissions. It compiles best lab-scale productivities, discusses key metabolic constraints, and offers a framework for host selection and operating conditions. Recent strain and process advances toward scale-up for carbon-negative biomanufacturing are also explored.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

CO2を原料とするCCU・バイオ製造は、日本のGX実現に向けた産業脱炭素とカーボンリサイクル政策の文脈で注目される。ただし本稿は実験室段階の技術レビューであり、SSBJ開示や投資家対応への直接的示唆は乏しい。

In the global GX context

CO2-based CCU and biomanufacturing sit within global net-zero industrial decarbonization and carbon-removal discussions, complementing disclosure frameworks like ISSB by expanding the abatement options companies can report. As a lab-scale review, it informs technology-readiness assessments rather than disclosure practice directly.

👥 読者別の含意

🔬研究者:CO2/H2発酵の代謝制約と宿主選定の枠組みを整理する出発点として有用。

🏢実務担当者:カーボンリサイクル型CCUの技術成熟度を把握する参考になるが、即時の事業判断材料としては限定的。

🏛政策担当者:CO2資源化技術への研究支援やカーボンリサイクル政策設計の基礎情報として参照可能。

📄 Abstract（原文）

Gas fermentation using anaerobic acetogenic bacteria represents a promising carbon capture and utilization strategy for converting C1 gases into valuable bioproducts. Among acetogens, Clostridium species have attracted significant attention due to their ability to produce native C2–C6 acids and alcohols through their versatile metabolism. While industrial applications have primarily focused on CO- and syngas-based fermentation, a large fraction of anthropogenic emissions originates from industrial sectors generating CO 2 -rich gas streams with limited or negligible CO content. CO 2 - fermentation, powered by renewable H 2 , offers a potential route for the valorization of these emissions and the development of carbon-negative bioprocesses. However, research on CO 2 /H 2 -driven gas fermentation by Clostridial acetogens remains limited compared with CO- and syngas-based systems, and a comprehensive overview of their potential is still lacking. This mini-review summarizes the current state of research, highlighting the best laboratory-scale performances achieved for native product formation and discussing the key metabolic constraints affecting growth and productivity. Furthermore, it provides a framework for selecting suitable host species and operating conditions tailored to specific target molecules, while exploring recent advances in strain development and process optimization that may support the future scale-up of CO 2 /H 2 -driven gas fermentation and its application in sustainable biomanufacturing.

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