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Butyric acid production from red algae by a newly isolated Clostridium sp S1

Authors
Lee, Kyung MinChoi, OkkyoungKim, Ki-YeonWoo, Han MinKim, YunjeHan, Sung OkSang, Byoung-InUm, Youngsoon
Issue Date
9월-2015
Publisher
SPRINGER
Keywords
Biofuel; Butyric acid fermentation; Clostridium; Galactose; Gelidium amansii; Red algae hydrolysate
Citation
BIOTECHNOLOGY LETTERS, v.37, no.9, pp.1837 - 1844
Indexed
SCIE
SCOPUS
Journal Title
BIOTECHNOLOGY LETTERS
Volume
37
Number
9
Start Page
1837
End Page
1844
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/92527
DOI
10.1007/s10529-015-1869-2
ISSN
0141-5492
Abstract
To produce butyric acid from red algae such as Gelidium amansii in which galactose is a main carbohydrate, microorganisms utilizing galactose and tolerating inhibitors in hydrolysis including levulinic acid and 5-hydroxymethylfurfural (HMF) are required. A newly isolated bacterium, Clostridium sp. S1 produced butyric acid not only from galactose as the sole carbon source but also from a mixture of galactose and glucose through simultaneous utilization. Notably, Clostridium sp. S1 produced butyric acid and a small amount of acetic acid with the butyrate:acetate ratio of 45.4:1 and it even converted acetate to butyric acid. Clostridium sp. S1 tolerated 0.5-2 g levulinic acid/l and recovered from HMF inhibition at 0.6-2.5 g/l, resulting in 85-92 % butyric acid concentration of the control culture. When acid-pretreated G. amansii hydrolysate was used, Clostridium sp. S1 produced 4.83 g butyric acid/l from 10 g galactose/l and 1 g glucose/l. Clostridium sp. S1 produces butyric acid from red algae due to its characteristics in sugar utilization and tolerance to inhibitors, demonstrating its advantage as a red algae-utilizing microorganism.
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