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Optimization of ethanol production from high dry matter liquefied dry sweet sorghum stalks
BIOtechMASS Unit, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens.ORCID iD: 0000-0002-3687-6173
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0003-0079-5950
2013 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 51, p. 91-98Article in journal (Refereed) Published
Abstract [en]

The ability of sweet sorghum to be utilized as feedstock for ethanol production at high initial dry material concentration was investigated. Sweet sorghum, after being dried, was liquefacted employing commercial cellulase solution Celluclast® 1.5L, in order submerged fermentation to be permitted under high-solids concentrations. The presence of a separate enzymatic liquefaction step at 350 kg m−3 initial DM enhanced both ethanol production and productivity by 29.76% and 250%, respectively. Response surface methodology, based on the central composite design was applied to explore the combined effect of liquefaction duration and enzyme loading in order liquefaction conditions to be optimized. When the optimum conditions were tested using an enzyme load of 8.32 FPU g−1 of dry material for 8.6 h at 50 °C, high productivity (3.0 kg m−3 h−1) and final ethanol production (62.5 kg m−3) were achieved.

Place, publisher, year, edition, pages
2013. Vol. 51, p. 91-98
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-9600DOI: 10.1016/j.biombioe.2013.01.007ISI: 000317999800011Scopus ID: 2-s2.0-84877351861Local ID: 83faf29f-7b36-451f-bb6a-07eb24db5511OAI: oai:DiVA.org:ltu-9600DiVA, id: diva2:982538
Note
Validerad; 2013; 20130215 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Matsakas, LeonidasChristakopoulos, Paul

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