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Bioethanol producti...
Bioethanol production from the green alga ulva rigida and the brown algae macrocystis pyrifera
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- Conte, Ricardo Pezoa (author)
- Industrial Chemistry and Reaction Engineering Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland
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- Ravanal, M. Cristina (author)
- Centre for Biochemical Engineering and Biotechnology, Department of Chemical Engineering and Biotechnology, University of Chile, Santiago, Chile
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- Mäki-Arvela, Päivi (author)
- Industrial Chemistry and Reaction Engineering Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland
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- Willför, Stefan (author)
- Wood and Paper Chemistry Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland
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- Lienqueo, M. Elena (author)
- Centre for Biochemical Engineering and Biotechnology, Department of Chemical Engineering and Biotechnology, University of Chile, Santiago, Chile
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- Mikkola, Jyri-Pekka (author)
- Umeå universitet,Kemiska institutionen,Industrial Chemistry and Reaction Engineering Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Åbo-Turku, Finland
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(creator_code:org_t)
- VTT Technical Research Centre of Finland, 2015
- 2015
- English.
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In: NWBC 2015. - : VTT Technical Research Centre of Finland. - 9789513883539 ; , s. 319-325
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Macroalgae are suitable bioresources to be explored as raw material for bioethanol production, as about 40 wt.% of its mass is composed of carbohydrates and they completely lack lignin. In this work the simultaneous saccharification and fermentation (SSF) of the green alga Ulva rigida and the brown alga Macrocystis pyrifera was performed. The algae were initially pretreated in deionized water or diluted sulfuric acid at 125°C in an autoclave for 60 min, respectively. Commercial cellulolytic enzymes and yeast were used for ethanol production. The carbohydrate composition of the fresh alga, pretreated alga and glucose and ethanol concentrations in the SSF processing are given. The water pretreatment solubilized 82 wt.% of the ulvan (rhamno-glucuroxylan) contained in U. rigida and 73 wt.% of the glucan remained in the residue. The diluted acid treatment removed 93 wt.% of the carbohydrates contained in U. rigida. The SSF of U. rigida pretreated with water produced 0.47 g EtOH/g sugar, with a 92 wt.% theoretical yield. In turn, water and diluted acid pretreatment of M. pyrifera increased 8.4 and 14.8 fold the carbohydrate content in the pretreated alga compared to the SSF of the fresh alga. The SSF of M. pyrifera pretreated with dilute sulfuric acid produced 0.15 g EtOH/g sugar, 29 wt.% theoretical yield. The production of ethanol was demonstrated for U. rigida and M. pyrifera with mild pretreatments. Especially in case of U. rigida simple water treatment allows to isolate ulvan for other purposes and efficiently ferment the remaining fibers.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Publication and Content Type
- ref (subject category)
- kon (subject category)
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