Fixation of carbon dioxide by a hydrogen-oxidizing bacterium for value-added products.

Jian Yu

Journal: World journal of microbiology & biotechnology 2018;34(7):89

PMID: 29886519

Abstract

With rapid technology progress and cost reduction, clean hydrogen from water electrolysis driven by renewable powers becomes a potential feedstock for CO fixation by hydrogen-oxidizing bacteria. Cupriavidus necator (formally Ralstonia eutropha), a representative member of the lithoautotrophic prokaryotes, is a promising producer of polyhydroxyalkanoates and single cell proteins. This paper reviews the fundamental properties of the hydrogen-oxidizing bacterium, the metabolic activities under limitation of individual gases and nutrients, and the value-added products from CO, including the products with large potential markets. Gas fermentation and bioreactor safety are discussed for achieving high cell density and high productivity of desired products under chemolithotrophic conditions. The review also updates the recent research activities in metabolic engineering of C. necator to produce novel metabolites from CO.

Address: Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, USA. [email protected].

DOI: 10.1007/s11274-018-2473-0

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https://dx.doi.org/10.1007/s11274-018-2473-0

MeSH Terms: Bacteria, Bioreactors, Carbon Cycle, Carbon Dioxide, Chemoautotrophic Growth, Cupriavidus necator, Dietary Proteins, Fermentation, Gases, Hydrogen, Hydrogenase, Hydroxybutyrates, Lipid Metabolism, Metabolic Engineering, Oxidation-Reduction, Polyesters, Polyhydroxyalkanoates