ABE production from yellow poplar through alkaline pre-hydrolysis, enzymatic saccharification, and fermentation

Title
ABE production from yellow poplar through alkaline pre-hydrolysis, enzymatic saccharification, and fermentation
Author
상병인
Keywords
yellow poplar; ABE; alkaline pre-hydrolysis; Clostridium acetobutylicum; Clostridium beijerinckii; enzymatic saccharification
Issue Date
2013-05
Publisher
Springer
Citation
Biotechnology and Bioprocess Engineering, 2013, 18(5), P.965-971
Abstract
ABE (acetone-butanol-ethanol) was produced through alkaline pre-hydrolysis, enzymatic saccharification, and fermentation using yellow poplar as a raw material. In alkaline pre-hydrolysis, 51.1% of the biomass remained as a residue. In the main woody components, the degrees of lignin and xylan removal were 94.3 and 62.0%, respectively. A yield of 80.9% for cellulose-to-glucose and 81.2% for xylan-to-xylose were obtained by enzymatic hydrolysis. The sugar composition of enzymatic hydrolysate was 95.1 g/L of glucose and 21.4 g/L of xylose. The enzymatic hydrolysate also contained 0.5 g/L of acetic acid and 0.5 g/L of total phenolics. Furfural and 5-hydroxymethylfurfural (5-HMF) were not detected in this hydrolysate. The yellow poplar hydrolysate (YPH) from enzymatic saccharification was used for the production of ABE using Clostridium acetobutylicum and C. beijerinckii. In YPH fermentation, C. acetobutylicum produced 18.1 g/L total ABE (productivity 0.38 g/L h, and yield 0.42), and C. beijerinckii produced 12.1 g/L (productivity 0.25 g/L h, and yield 0.37). Although the ABE productivity by C. beijerinckii was slightly low, the general performance of ABE fermentation in YPH was similar to or higher than those reported previously. Therefore, alkaline pre-hydrolysis could be a very effective pretreatment step prior to enzymatic hydrolysis.
URI
https://link.springer.com/article/10.1007%2Fs12257-013-0143-5
ISSN
1226-8372
DOI
10.1007/s12257-013-0143-5
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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