Document Detail

Ethanol production from steam-explosion pretreated wheat straw.
MedLine Citation:
PMID:  16915665     Owner:  NLM     Status:  MEDLINE    
Bioconversion of cereal straw to bioethanol is becoming an attractive alternative to conventional fuel ethanol production from grains. In this work, the best operational conditions for steam-explosion pretreatment of wheat straw for ethanol production by a simultaneous saccharification and fermentation process were studied, using diluted acid [H2SO4 0.9% (w/w)] and water as preimpregnation agents. Acid- or water-impregnated biomass was steam-exploded at different temperatures (160-200 degrees C) and residence times (5, 10, and 20 min). Composition of solid and filtrate obtained after pretreatment, enzymatic digestibility and ethanol production of pretreated wheat straw at different experimental conditions was analyzed. The best pretreatment conditions to obtain high conversion yield to ethanol (approx 80% of theoretical) of cellulose-rich residue after steam-explosion were 190 degrees C and 10 min or 200 degrees C and 5 min, in acid-impregnated straw. However, 180 degrees C for 10 min in acid-impregnated biomass provided the highest ethanol yield referred to raw material (140 L/t wheat straw), and sugars recovery yield in the filtrate (300 g/kg wheat straw).
Ignacio Ballesteros; Ma José Negro; José Miguel Oliva; Araceli Cabañas; Paloma Manzanares; Mercedes Ballesteros
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied biochemistry and biotechnology     Volume:  129-132     ISSN:  0273-2289     ISO Abbreviation:  Appl. Biochem. Biotechnol.     Publication Date:  2006  
Date Detail:
Created Date:  2006-08-18     Completed Date:  2006-09-15     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8208561     Medline TA:  Appl Biochem Biotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  496-508     Citation Subset:  IM    
CIEMAT-Renewable Energies Division, Av. Complutense, 22, 28040-Madrid, Spain.
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MeSH Terms
Bioreactors / microbiology
Cell Culture Techniques / methods
Ethanol / isolation & purification,  metabolism*
Hydrogen-Ion Concentration
Kluyveromyces / metabolism*
Plant Components, Aerial / chemistry*,  microbiology*
Sulfuric Acids / chemistry
Triticum / chemistry*,  microbiology*
Reg. No./Substance:
0/Steam; 0/Sulfuric Acids; 64-17-5/Ethanol; 7664-93-9/sulfuric acid

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

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