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

Abstract

The wet oxidation process of wheat straw has been studied as a pretreatment method to attain the 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-{beta}-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.

Authors:
; ; ; ;  [1]
  1. Risoe National Lab., Roskilde (Denmark). Environmental Science and Technology Dept.
Publication Date:
OSTI Identifier:
207900
Resource Type:
Journal Article
Journal Name:
Biotechnology and Bioengineering
Additional Journal Information:
Journal Volume: 49; Journal Issue: 5; Other Information: PBD: 5 Mar 1996
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; STRAW; ALKALINE HYDROLYSIS; CELLULOSE; ENZYMATIC HYDROLYSIS; ETHANOL; BIOSYNTHESIS; AGRICULTURAL WASTES

Citation Formats

Bjerre, A B, Olesen, A B, Fernqvist, T, Ploeger, A, and Schmidt, A S. Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose. United States: N. p., 1996. Web. doi:10.1002/(SICI)1097-0290(19960305)49:5<568::AID-BIT10>3.3.CO;2-4.
Bjerre, A B, Olesen, A B, Fernqvist, T, Ploeger, A, & Schmidt, A S. Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose. United States. https://doi.org/10.1002/(SICI)1097-0290(19960305)49:5<568::AID-BIT10>3.3.CO;2-4
Bjerre, A B, Olesen, A B, Fernqvist, T, Ploeger, A, and Schmidt, A S. 1996. "Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose". United States. https://doi.org/10.1002/(SICI)1097-0290(19960305)49:5<568::AID-BIT10>3.3.CO;2-4.
@article{osti_207900,
title = {Pretreatment of wheat straw using combined wet oxidation and alkaline hydrolysis resulting in convertible cellulose and hemicellulose},
author = {Bjerre, A B and Olesen, A B and Fernqvist, T and Ploeger, A and Schmidt, A S},
abstractNote = {The wet oxidation process of wheat straw has been studied as a pretreatment method to attain the 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-{beta}-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.},
doi = {10.1002/(SICI)1097-0290(19960305)49:5<568::AID-BIT10>3.3.CO;2-4},
url = {https://www.osti.gov/biblio/207900}, journal = {Biotechnology and Bioengineering},
number = 5,
volume = 49,
place = {United States},
year = {Tue Mar 05 00:00:00 EST 1996},
month = {Tue Mar 05 00:00:00 EST 1996}
}