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2021 Fiscal Year Final Research Report

Utilization of gas mixture with low hydrogen content for microbial carbon dioxide fixation

Research Project

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Project/Area Number 19K22923
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 64:Environmental conservation measure and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Tsuge Takeharu  東京工業大学, 物質理工学院, 准教授 (70332260)

Project Period (FY) 2019-06-28 – 2022-03-31
Keywordsポリヒドロキシアルカン酸
Outline of Final Research Achievements

This study aimed to use gas mixture with low hydrogen content for autotrophic culture of hydrogen-oxidizing bacteria. The lower explosive limit of hydrogen is 4%, at which hydrogen can be safely handled during cultivation. However, the ability of carbon dioxide fixation by the hydrogen-oxidizing bacteria at low hydrogen concentration has not been investigated. This study validated the use of low-concentration hydrogen gas mixture in terms of the bacterial cell growth and biopolyester production.

Free Research Field

応用微生物学

Academic Significance and Societal Importance of the Research Achievements

低濃度水素を用いた独立栄養培養法は、水素の爆発を回避し、安全な培養技術としてのプラットフォームになり得るものである。水素の爆発下限界での効率的な培養法が確立できれば、水素細菌による物質生産系は非常に大きな発展性を有している。また、太陽光などの再生可能なエネルギーから水の電気分解によって生産されたグリーン水素を利用すれば、究極の持続可能な物質生産系として環境保全に大きく貢献する。

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Published: 2023-01-30  

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