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Lignin-first biomass fractionation using a hybrid organosolv: Steam explosion pretreatment technology improves the saccharification and fermentability of spruce biomass
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-3687-6173
Chalmers University of Technology, Division of Industrial Biotechnology, Department of Biology and Biological Engineering,Göteborg, Sweden. Department of Molecular Biology and Biotechnology, Firth Court, Western Bank, University of Sheffield, UK.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
Chalmers University of Technology, Department of Physics, Göteborg, Sweden.
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2019 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 273, p. 521-528Article in journal (Refereed) Published
Abstract [en]

For a transition to a sustainable society, fuels, chemicals, and materials should be produced from renewable resources. Lignocellulosic biomass constitutes an abundant and renewable feedstock; however, its successful application in a biorefinery requires efficient fractionation into its components; cellulose, hemicellulose and lignin. Here, we demonstrate that a newly established hybrid organosolv – steam explosion pretreatment can effectively fractionate spruce biomass to yield pretreated solids with high cellulose (72% w/w) and low lignin (delignification up to 79.4% w/w) content. The cellulose-rich pretreated solids present high saccharification yields (up to 61% w/w) making them ideal for subsequent bioconversion processes. Moreover, under high-gravity conditions (22% w/w) we obtained an ethanol titer of 61.7 g/L, the highest so far reported for spruce biomass. Finally, the obtained high-purity lignin is suitable for various advanced applications. In conclusion, hybrid organosolv pretreatment could offer a closed-loop biorefinery while simultaneously adding value to all biomass components.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 273, p. 521-528
Keywords [en]
Softwood, Organosolv explosion, High gravity fermentation, Fractionation, Biorefinery
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71766DOI: 10.1016/j.biortech.2018.11.055ISI: 000453742100064PubMedID: 30471644Scopus ID: 2-s2.0-85056772752OAI: oai:DiVA.org:ltu-71766DiVA, id: diva2:1266178
Funder
Swedish Energy Agency, 2015-006989
Note

Validerad;2018;Nivå 2;2018-11-27 (johcin)

Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-03-27Bibliographically approved

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Matsakas, LeonidasRova, UlrikaChristakopoulos, Paul

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