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Sequential high gravity ethanol fermentation and anaerobic digestion of steam explosion and organosolv pretreated corn stover
Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens.
Industrial Biotechnology & Biocatalysis Group, School of Chemical Engineering, National Technical University of Athens.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-3687-6173
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0001-7500-2367
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2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 244:1, p. 1129-1136Article in journal (Refereed) Published
Abstract [en]

The present work investigates the suitability of pretreated corn stover (CS) to serve as feedstock for high gravity (HG) ethanol production at solids-content of 24 wt%. Steam explosion, with and without the addition of H2SO4, and organosolv pretreated CS samples underwent a liquefaction/saccharification step followed by simultaneous saccharification and fermentation (SSF). Maximum ethanol concentration of ca. 76 g/L (78.3% ethanol yield) was obtained from steam exploded CS (SECS) with 0.2% H2SO4. Organosolv pretreated CS (OCS) also resulted in high ethanol concentration of ca. 65 g/L (62.3% ethanol yield). Moreover, methane production through anaerobic digestion (AD) was conducted from fermentation residues and resulted in maximum methane yields of ca. 120 and 69 mL/g volatile solids (VS) for SECS and OCS samples, respectively. The results indicated that the implementation of a liquefaction/saccharification step before SSF employing a liquefaction reactor seemed to handle HG conditions adequately.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 244:1, p. 1129-1136
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
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URN: urn:nbn:se:ltu:diva-65249DOI: 10.1016/j.biortech.2017.08.112ISI: 000410545300140PubMedID: 28869123Scopus ID: 2-s2.0-85028469311OAI: oai:DiVA.org:ltu-65249DiVA, id: diva2:1135052
Note

Validerad;2017;Nivå 2;2017-09-20 (rokbeg)

Available from: 2017-08-22 Created: 2017-08-22 Last updated: 2023-09-05Bibliographically approved

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Matsakas, LeonidasRova, UlrikaChristakopoulos, PaulTopakas, Evangelos

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