Article Review: Unveiling the Potential of Clostridium acetobutylicum for Biofuel Production

Raghda Salim Sultan

doi:10.55544/sjmars.3.4.10

Authors

Raghda Salim Sultan Department of Biotechnology, Collage of Science, University of Baghdad, Baghdad, IRAQ.

DOI:

https://doi.org/10.55544/sjmars.3.4.10

Keywords:

ABE fermentation, Butanol production, Clostridium acetobutylicum, Metabolic engineering, Sustainable biofuels

Abstract

The acetone-butanol-ethanol (ABE) fermentation is a significant and classic example of bacterial fermentation, particularly in the production of butanol, a valuable feedstock for the chemical industry. Originating during the First World War to produce acetone for cordite manufacturing, the ABE process has historically been overshadowed by the cheaper petrochemical production of solvents, leading to its discontinuation. However, increasing environmental concerns and the depletion of fossil fuel reserves have revived interest in ABE fermentation as a method to produce more sustainable biofuels. Despite extensive knowledge of butanol metabolism and the involvement of various clostridia species, genetic manipulation of these bacteria remains limited, restricting efforts to optimize them for industrial-scale ABE solvent production. For example, understanding and enhancing solvent formation within the ABE pathway, particularly increasing butanol production while reducing acid and acetone byproducts, is crucial for industrial applications. Advances in metabolic engineering of Clostridium acetobutylicum, such as gene knockout or insertion, offer potential for improving ABE production, although this research is still in its early stages. The complete sequencing of the C. acetobutylicum genome presents opportunities for more sophisticated genetic modifications, with the reversible butanol dehydrogenase system being a key target. Additionally, high-throughput techniques like DNA microarrays can be employed to study the effects of genetic changes on global gene expression, aiding in the identification of factors influencing butanol formation. Ultimately, the development of strains capable of producing butanol more efficiently could lead to its large-scale production as a sustainable biofuel, with C. acetobutylicum playing a central role due to its performance in ABE fermentation. Despite the progress, further research and technological advancements are needed to make this process economically viable for widespread industrial use.

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