Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose

The wet oxidation process of wheat straw has been studied as a pretreatment method to attain our main goal: To break down cellulose to glucose enzymatic, and secondly, to dissolve hemicellulose (e.g., for fermentation) without producing microbial inhibitors. Wet oxidation combined with base addition...

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Main Authors: Bjerre, Anne Belinda, Olesen, Anne Bjerring, Fernqvist, Tomas, Ploger, Annette, Schmidt, Annette Skammelsen
Format: Article
Language:English
Published: John Wiley & Sons Inc. 2008
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Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/3246
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spelling my.unimap-32462019-03-12T01:25:16Z Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose Bjerre, Anne Belinda Olesen, Anne Bjerring Fernqvist, Tomas Ploger, Annette Schmidt, Annette Skammelsen Biomass Hemicellulose Oxidation Aspergillus The wet oxidation process of wheat straw has been studied as a pretreatment method to attain our main goal: To break down cellulose to glucose enzymatic, and secondly, to dissolve hemicellulose (e.g., for fermentation) without producing microbial inhibitors. Wet oxidation combined with base addition readily oxidizes lignin from wheat straw facilitating the polysaccharides for enzymatic hydrolysis. By using a specially constructed autoclave system, the wet oxidation process was optimized with respect to both reaction time and temperature. The best conditions (20 g/L straw, 170°C, 5 to 10 min) gave about 85% w/w yield of converting cellulose to glucose. The process water, containing dissolved hemicellulose and carboxylic acids, has proven to be a direct nutrient source for the fungus Aspergillus niger producing exo-β-xylosidase. Furfural and hydroxymethyl-furfural, known inhibitors of microbial growth when other pretreatment systems have been applied, were not observed following the wet oxidation treatment. 2008-11-14T00:34:03Z 2008-11-14T00:34:03Z 1996 Article Biotechnology and Bioengineering, vol. 49, issue 5, 1996, pages 568-577 0006-3592 http://hdl.handle.net/123456789/3246 en John Wiley & Sons Inc.
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Biomass
Hemicellulose
Oxidation
Aspergillus
spellingShingle Biomass
Hemicellulose
Oxidation
Aspergillus
Bjerre, Anne Belinda
Olesen, Anne Bjerring
Fernqvist, Tomas
Ploger, Annette
Schmidt, Annette Skammelsen
Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
description The wet oxidation process of wheat straw has been studied as a pretreatment method to attain our main goal: To break down cellulose to glucose enzymatic, and secondly, to dissolve hemicellulose (e.g., for fermentation) without producing microbial inhibitors. Wet oxidation combined with base addition readily oxidizes lignin from wheat straw facilitating the polysaccharides for enzymatic hydrolysis. By using a specially constructed autoclave system, the wet oxidation process was optimized with respect to both reaction time and temperature. The best conditions (20 g/L straw, 170°C, 5 to 10 min) gave about 85% w/w yield of converting cellulose to glucose. The process water, containing dissolved hemicellulose and carboxylic acids, has proven to be a direct nutrient source for the fungus Aspergillus niger producing exo-β-xylosidase. Furfural and hydroxymethyl-furfural, known inhibitors of microbial growth when other pretreatment systems have been applied, were not observed following the wet oxidation treatment.
format Article
author Bjerre, Anne Belinda
Olesen, Anne Bjerring
Fernqvist, Tomas
Ploger, Annette
Schmidt, Annette Skammelsen
author_facet Bjerre, Anne Belinda
Olesen, Anne Bjerring
Fernqvist, Tomas
Ploger, Annette
Schmidt, Annette Skammelsen
author_sort Bjerre, Anne Belinda
title Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
title_short Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
title_full Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
title_fullStr Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
title_full_unstemmed Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
title_sort pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose
publisher John Wiley & Sons Inc.
publishDate 2008
url http://dspace.unimap.edu.my/xmlui/handle/123456789/3246
_version_ 1643805712487284736
score 13.214268