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Challenges in enzym...
Challenges in enzymatic hydrolysis and fermentation of pretreated Arundo donax revealed by a comparison between SHF and SSF
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- Ask, Magnus, 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Olofsson, Kim (author)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
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Di Felice, T. (author)
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- Ruohonen, L. (author)
- Teknologian Tutkimuskeskus (VTT),Technical Research Centre of Finland (VTT)
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- Penttila, M. (author)
- Teknologian Tutkimuskeskus (VTT),Technical Research Centre of Finland (VTT)
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- Lidén, Gunnar (author)
- Lund University,Lunds universitet,Avdelningen för kemiteknik,Institutionen för processteknik och tillämpad biovetenskap,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Chemical Engineering,Department of Process and Life Science Engineering,Departments at LTH,Faculty of Engineering, LTH
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- Olsson, Lisbeth, 1963 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- Elsevier BV, 2012
- 2012
- English.
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In: Process Biochemistry. - : Elsevier BV. - 1359-5113 .- 1873-3298. ; 47:10, s. 1452-1459
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Abstract
Subject headings
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- The perennial herbaceous crop Arundo donax is a potential feedstock for second-generation bioethanol production. In the present work, two different process options were investigated for the conversion of two differently steam-pretreated batches of A. donax. The pretreated raw material was converted to ethanol with a xylose-consuming Saccharomyces cerevisiae strain, VTT C-10880, by applying either separate hydrolysis and fermentation (SHF) or simultaneous saccharification and fermentation (SSF). The highest overall ethanol yield and final ethanol concentration were achieved using SHF (0.27 g g(-1) and 20.6 g L-1 compared to 0.24 g g(-1) and 19.0 g L-1 when SSF was used). The performance of both SHF and SSF was improved by complementing the cellulolytic enzymes with hemicellulases. The higher amount of acetic acid in one of the batches was shown to strongly affect xylose consumption in the fermentation. Only half of the xylose was consumed when batch 1 (high acetic acid) was fermented, compared to that 94% of the xylose was consumed in fermentation of batch 2 (lower acetic acid). Furthermore, the high amount of xylooligomers present in the pretreated materials considerably inhibited the enzymatic hydrolysis. Both the formation of xylooligomers and acetic acid thus need to be considered in the pretreatment process in order to achieve efficient conversion of A. donax to ethanol.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Keyword
- fermentation
- SHF
- Giant reed
- Acetic acid stress
- simultaneous saccharification
- exploded wheat-straw
- Arundo donax
- acetic-acid
- glucose
- saccharomyces-cerevisiae tmb3400
- genetically-engineered strain
- xylose
- bioethanol production
- SSF
- ethanol-production
- Xylooligomers
- corn stover
- Arundo donax
- Giant reed
- SHF
- SSF
- Acetic acid stress
- Xylooligomers
Publication and Content Type
- art (subject category)
- ref (subject category)
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