Document Detail


Ethanol production from high dry matter corncob using fed-batch simultaneous saccharification and fermentation after combined pretreatment.
MedLine Citation:
PMID:  20004092     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
To obtain high concentration of ethanol from cellulose, corncob was pretreated with acid and alkali to remove non-cellulose components, and then subjected to simultaneous saccharification and fermentation (SSF). An ethanol concentration as high as 69.2 g/L was achieved with 19% dry matter (DM) using batch SSF, resulting in an 81.2% overall ethanol yield. A fed-batch process using a high solid concentration was also investigated. Fresh substrate was pretreated with dilute sulfuric acid-sodium hydroxide, and then added at different amounts during the first 24 h, to yield a final dry matter content of 25% (w/v). SSF conditions with cellulose loading of 22.8 FPU/g glucan, dry yeast (Saccharomyces cerevisiae) loading of 5 g/L and substrate supplementation every 4h yielded the highest ethanol concentration of 84.7 g/L after 96 h. This corresponded to a 79% overall ethanol yield.
Authors:
Mingjia Zhang; Fang Wang; Rongxin Su; Wei Qi; Zhimin He
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-09
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-03-31     Completed Date:  2010-10-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  4959-64     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Ltd. All rights reserved.
Affiliation:
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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MeSH Terms
Descriptor/Qualifier:
Acids / chemistry
Ammonia / chemistry
Bioreactors
Biotechnology / methods*
Carbohydrates / chemistry*
Energy-Generating Resources
Ethanol / chemistry*
Fermentation
Formic Acids / chemistry
Hydrolysis
Saccharomyces cerevisiae / metabolism
Sodium Hydroxide / chemistry
Sulfuric Acids / chemistry*
Zea mays
Chemical
Reg. No./Substance:
0/Acids; 0/Carbohydrates; 0/Formic Acids; 0/Sulfuric Acids; 1310-73-2/Sodium Hydroxide; 64-17-5/Ethanol; 64-18-6/formic acid; 7664-41-7/Ammonia; 7664-93-9/sulfuric acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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