Ethanol production from non-starch carbohydrates of wheat bran

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Ethanol production from non-starch carbohydrates of wheat bran. / Palmarola Adrados, Beatriz; Choteborska, P; Galbe, Mats; Zacchi, Guido.

In: Bioresource Technology, Vol. 96, No. 7, 2005, p. 843-850.

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Palmarola Adrados, Beatriz ; Choteborska, P ; Galbe, Mats ; Zacchi, Guido. / Ethanol production from non-starch carbohydrates of wheat bran. In: Bioresource Technology. 2005 ; Vol. 96, No. 7. pp. 843-850.

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TY - JOUR

T1 - Ethanol production from non-starch carbohydrates of wheat bran

AU - Palmarola Adrados, Beatriz

AU - Choteborska, P

AU - Galbe, Mats

AU - Zacchi, Guido

PY - 2005

Y1 - 2005

N2 - 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.

AB - 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.

U2 - 10.1016/j.biortech.2004.07.004

DO - 10.1016/j.biortech.2004.07.004

M3 - Article

VL - 96

SP - 843

EP - 850

JO - Bioresource Technology

T2 - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

IS - 7

ER -