Overcoming the energetic limitations of syngas fermentation.

Abstract:

:The fermentation of synthesis gas (including carbon monoxide, carbon dioxide, and hydrogen) with anaerobic acetogens is an established biotechnological process that has recently been transferred to a commercial scale. The natural product spectrum of acetogens is natively restricted to acetate, ethanol, and 2,3-butanediol but is rapidly expanding to heterologous products. Syngas fermentation can achieve high carbon-efficiencies; however, the underlying metabolism is operating at a thermodynamic limit. This necessitates special enzymatic properties for energy conservation by acetogens. Therefore, the availability of cellular energy is considered to restrain the efficient production of energy-intense products with complex production pathways. The optimization of the feed-gas composition and other process parameters, genetic engineering, and integration with other biotechnologies is required to overcome this limitation.

journal_name

Curr Opin Chem Biol

authors

Molitor B,Marcellin E,Angenent LT

doi

10.1016/j.cbpa.2017.10.003

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

84-92

eissn

1367-5931

issn

1879-0402

pii

S1367-5931(17)30056-X

journal_volume

41

pub_type

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