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Hydrogen Production from Methane by Methylomonas sp. DH-1 under Micro-aerobic Conditions

Title
Hydrogen Production from Methane by Methylomonas sp. DH-1 under Micro-aerobic Conditions
Authors
Jo, Seo YoungRhie, Mi NaJung, Soo MinSohn, Yu JungYeon, Young JooKim, Min-SikPark, ChulhwanLee, JinwonPark, Si JaeNa, Jeong-Geol
Ewha Authors
박시재
SCOPUS Author ID
박시재scopus
Issue Date
2020
Journal Title
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING
ISSN
1226-8372JCR Link

1976-3816JCR Link
Citation
BIOTECHNOLOGY AND BIOPROCESS ENGINEERING vol. 25, no. 1, pp. 71 - 77
Keywords
Methylomonas spDH-1methanotrophhydrogenmethanemicro-aerobic conditions
Publisher
KOREAN SOC BIOTECHNOLOGY &

BIOENGINEERING
Indexed
SCIE; SCOPUS; KCI WOS scopus
Document Type
Article
Abstract
Fueled by the recognition of hydrogen as a promising renewable energy source for the future, there have been many attempts to find greener and more economical ways for its production from various sources. In this study, Methylomonas sp. DH-1, a type I methanotroph, was found to produce hydrogen using methane as a sole carbon source, under micro-aerobic conditions; this is analogous to the partial oxidation of methane in a thermochemical process based on metal catalysts. Flask cultures of Methylomonas sp. DH-1 were used to investigate the effects of different culture conditions on hydrogen production, including oxygen levels, methane/oxygen ratios, and initial cell densities. Methylomonas sp. DH-1 could produce hydrogen at an oxygen level below 4%, regardless of the methane content in the flask, implying that the critical factor for hydrogen production is the oxygen level, rather than the methane/oxygen ratio. Moreover, Methylomonas sp. DH-1 shows reversibility in hydrogen production and uptake, because the strain produces hydrogen under micro-aerobic conditions, uptakes it when the oxygen levels increase, and restores the hydrogen production capability when conditions become microaerobic again. Under initial conditions of 30% methane, 70% air, and an OD600nm of 6, hydrogen production was 26.87 mu mol and its yields per methane and dry cell weight were 14.98 mmol-H2/mol-CH4 and 101.53 mu mol-H2/g DCW, respectively, after 24 h of cultivation.
DOI
10.1007/s12257-019-0256-6
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엘텍공과대학 > 화학신소재공학전공 > Journal papers
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