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Engineering Clostridium for improved solvent production: recent progress and perspective
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Engineering Clostridium for improved solvent production: recent progress and perspective
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Engineering Clostridium for improved solvent production: recent progress and perspective
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Journal Article
Engineering Clostridium for improved solvent production: recent progress and perspective
2019
Overview
Clostridia are Gram-positive, spore-forming, obligate anaerobic bacteria that can produce solvents such as acetone, ethanol, and butanol, which can be used as biofuels or building block chemicals. Many successful attempts have been made to improve solvent yield and titer from sugars through metabolic engineering of solventogenic and acidogenic clostridia. More recently, cellulolytic and acetogenic clostridia have also attracted high interests for their ability to utilize low-cost renewable substrates such as cellulose and syngas. Process engineering such as in situ butanol recovery and consolidated bioprocessing (CBP) has been developed for improved solvent titer and productivity. This review focuses on metabolic and process engineering strategies for solvent production from sugars, lignocellulosic biomass, and syngas by various clostridia, including conventional solventogenic
Clostridium acetobutylicum
, engineered acidogens such as
C. tyrobutyricum
and
C. cellulovorans
, and carboxydotrophic acetogens such as
C. carboxidivorans
and
C. ljungdahlii
.
