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Ethanol production from non-starch carbohydrates of wheat bran

Palmarola Adrados, Beatriz LU ; Choteborska, P; Galbe, Mats LU and Zacchi, Guido LU (2005) In Bioresource Technology 96(7). p.843-850
Abstract
Wheat bran (WB), produced worldwide in large quantities as a by-product of the wheat milling industry, constitutes a significant underutilized source of sugars. This paper describes various methods of hydrolyzing the abundant polysaccharides in bran to yield a sugar feedstock suitable for fermentation into bioethanol. Firstly, the starch in the bran was released using amylolytic enzymes. The fibrous material remaining was further hydrolyzed. Acid hydrolysis, heat pretreatment followed by enzymatic hydrolysis and direct enzymatic hydrolysis were compared in terms of total sugar yield and pentose sugar yield. The maximum total sugar yield was achieved when small amounts of acid were added at the pretreatment step prior to enzymatic... (More)
Wheat bran (WB), produced worldwide in large quantities as a by-product of the wheat milling industry, constitutes a significant underutilized source of sugars. This paper describes various methods of hydrolyzing the abundant polysaccharides in bran to yield a sugar feedstock suitable for fermentation into bioethanol. Firstly, the starch in the bran was released using amylolytic enzymes. The fibrous material remaining was further hydrolyzed. Acid hydrolysis, heat pretreatment followed by enzymatic hydrolysis and direct enzymatic hydrolysis were compared in terms of total sugar yield and pentose sugar yield. The maximum total sugar yield was achieved when small amounts of acid were added at the pretreatment step prior to enzymatic hydrolysis. This form of pretreatment released most pentosans and significantly enhanced the hydrolysis of cellulose. The overall sugar yield of this combined hydrolysis method reached 80% of the theoretical and it consisted of 13.5g arabinose, 22.8g xylose and 16.7g glucose per 100g starch-free bran. (C) 2004 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Bioresource Technology
volume
96
issue
7
pages
843 - 850
publisher
Elsevier
external identifiers
  • pmid:15607198
  • wos:000226761800012
  • scopus:10944236180
ISSN
1873-2976
DOI
10.1016/j.biortech.2004.07.004
language
English
LU publication?
yes
id
096787fd-b337-42ed-a3ed-2879ab5b20ee (old id 151760)
date added to LUP
2007-06-25 14:34:55
date last changed
2017-09-03 04:28:35
@article{096787fd-b337-42ed-a3ed-2879ab5b20ee,
  abstract     = {Wheat bran (WB), produced worldwide in large quantities as a by-product of the wheat milling industry, constitutes a significant underutilized source of sugars. This paper describes various methods of hydrolyzing the abundant polysaccharides in bran to yield a sugar feedstock suitable for fermentation into bioethanol. Firstly, the starch in the bran was released using amylolytic enzymes. The fibrous material remaining was further hydrolyzed. Acid hydrolysis, heat pretreatment followed by enzymatic hydrolysis and direct enzymatic hydrolysis were compared in terms of total sugar yield and pentose sugar yield. The maximum total sugar yield was achieved when small amounts of acid were added at the pretreatment step prior to enzymatic hydrolysis. This form of pretreatment released most pentosans and significantly enhanced the hydrolysis of cellulose. The overall sugar yield of this combined hydrolysis method reached 80% of the theoretical and it consisted of 13.5g arabinose, 22.8g xylose and 16.7g glucose per 100g starch-free bran. (C) 2004 Elsevier Ltd. All rights reserved.},
  author       = {Palmarola Adrados, Beatriz and Choteborska, P and Galbe, Mats and Zacchi, Guido},
  issn         = {1873-2976},
  language     = {eng},
  number       = {7},
  pages        = {843--850},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Ethanol production from non-starch carbohydrates of wheat bran},
  url          = {http://dx.doi.org/10.1016/j.biortech.2004.07.004},
  volume       = {96},
  year         = {2005},
}