Medium-Chain Fatty Acids (MCFA) Production Through Anaerobic Fermentation Using Clostridium kluyveri: Effect of Ethanol and Acetate
2018
Reddy, M Venkateswar | Mohan, S Venkata | Chang, Young-Cheol
Medium-chain fatty acids (MCFA) are saturated monocarboxylic acids and can be used as antimicrobials, corrosion inhibitors, precursors in biodiesel, and bioplastic production. In the present study, MCFA production was evaluated with acetate and ethanol using the bacteria Clostridium kluyveri. Effects of substrate, electron donor, and methane inhibitor on MCFA production were evaluated. Bacteria successfully converted the ethanol and acetate to butyrate (C4), caproate (C6), and caprylate (C8) by chain elongation process. The highest concentrations of butyrate (4.6 g/l), caproate (3.2 g/l), and caprylate (0.5 g/l) were obtained under methane inhibition conditions than other conditions. The productions of butyrate and caproate were 1.6 and 1.48 times higher under methane inhibition conditions, respectively. Results denoted that the bacteria C. kluyveri can be used for conversion of acetate and ethanol into useful products like butyrate and caproate.
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