Electrochemical detoxification of phenolic compounds in lignocellulosic hydrolysate for Clostridium fermentation

Title
Electrochemical detoxification of phenolic compounds in lignocellulosic hydrolysate for Clostridium fermentation
Authors
이경민민경선최옥경김기연우한민김연제한성옥엄영순
Keywords
Electrochemical detoxification; Phenolic compounds; Clostridium fermentation; Lignocellulosic hydrolysate
Issue Date
2015-07
Publisher
Bioresource technology
Citation
VOL 187, 228-234
Abstract
Lignocellulosic biomass is being preferred as a feedstock in the biorefinery, but lignocellulosic hydrolysate usually contains inhibitors against microbial fermentation. Among these inhibitors, phenolics are highly toxic to butyric acid-producing and butanol-producing Clostridium even at a low concentration. Herein, we developed an electrochemical polymerization method to detoxify phenolic compounds in lignocellulosic hydrolysate for efficient Clostridium fermentation. After the electrochemical detoxification for 10 h, 78%, 77%, 82%, and 94% of p-coumaric acid, ferulic acid, vanillin, and syringaldehyde were removed, respectively. Furthermore, 71% of total phenolics in rice straw hydrolysate were removed without any sugar-loss. Whereas the cell growth and metabolite production of Clostridium tyrobutyricum and Clostridium beijerinckii were completely inhibited in un-detoxified hydrolysate, those in detoxifying rice straw hydrolysate were recovered to 70–100% of the control cultures. The electrochemical detoxification method described herein provides an efficient strategy for producing butanol and butyric acid through Clostridium fermentation with lignocellulosic hydrolysate.
URI
http://pubs.kist.re.kr/handle/201004/49553
ISSN
09608524
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KIST Publication > Article
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