Enhanced biological fixation of methane for microbial lipid production by recombinant Methylomicrobium buryatense

Biotechnology for Biofuels
Qiang FeiPhilip T Pienkos

Abstract

Due to the success of shale gas development in the US, the production cost of natural gas has been reduced significantly, which in turn has made methane (CH4), the major component of natural gas, a potential alternative substrate for bioconversion processes compared with other high-price raw material sources or edible feedstocks. Therefore, exploring effective ways to use CH4 for the production of biofuels is attractive. Biological fixation of CH4 by methanotrophic bacteria capable of using CH4 as their sole carbon and energy source has obtained great attention for biofuel production from this resource. In this study, a fast-growing and lipid-rich methanotroph, Methylomicrobium buryatense 5GB1 and its glycogen-knock-out mutant (AP18) were investigated for the production of lipids derived from intracellular membranes, which are key precursors for the production of green diesel. The effects of culture conditions on cell growth and lipid production were investigated in high cell density cultivation with continuous feeding of CH4 and O2. The highest dry cell weight observed was 21.4 g/L and the maximum lipid productivity observed was 45.4 mg/L/h obtained in batch cultures, which corresponds to a 2-fold enhancement in cell density a...Continue Reading

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Citations

Aug 24, 2020·Trends in Biotechnology·Anh Duc Nguyen, Eun Yeol Lee
Sep 27, 2020·Water Research·Kalimuthu JawaharrajVenkataramana Gadhamshetty
Jul 1, 2021·Biotechnology Advances·Martin A Palazzolo, Manuel Garcia-Perez

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Methods Mentioned

BETA
PCR

Software Mentioned

Gibson Assembly
MaGE

Related Concepts

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