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Ethanol production from Saccharina japonica using an optimized extremely low acid pretreatment followed by simultaneous saccharification and fermentation.
MedLine Citation:
PMID:  23131631     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
An extremely low acid (ELA) pretreatment using 0.06% (w/w) sulfuric acid at 170°C for 15min was employed to extract non-glucan components from Saccharina japonica, a brown macroalgae. Subsequent simultaneous saccharification and fermentation (SSF) was conducted using Saccharomyces cerevisiae DK 410362 and cellulase (15 FPU/g-glucan) and ß-glucosidase (70 pNPGU/g-glucan). Deionized water was used for making fermentation suspension. After the ELA pretreatment, a glucan content of 29.10% and an enzymatic digestibility of 83.96% was obtained for pretreated S. japonica. These values are 4.2- and 2.4-fold higher, respectively, than those of obtained with untreated S. japonica. In SSF, a bioethanol concentration of 6.65g/L was obtained, corresponding to a glucose equivalent concentration of 13.01g/L, which indicated an SSF yield of 67.41% based on the total available glucan of the pretreated S. japonica. The remaining separated liquid hydrolysate, which contains mannitol and alginate-derived oligosaccharides can be applied to other fermentations.
Authors:
Ji Ye Lee; Pan Li; Jieun Lee; Hyun Jin Ryu; Kyeong Keun Oh
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-11
Journal Detail:
Title:  Bioresource technology     Volume:  127C     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-11-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  119-125     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Applied Chemical Engineering, Dankook University, Cheonan, Chungnam 330-714, South Korea.
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