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Organosolv fractionation of spruce bark using ethanol-water mixtures: towards a novel bio-refinery concept
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-1132-8947
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
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-0079-5950
2021 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 341, article id 125855Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to assess the effect of hot water extraction followed by organosolv pretreatment on the enzymatic hydrolysability of spruce bark biomass. To this end, samples were pretreated at five different temperatures in the presence or not of acid catalyst. The cellulose content of pre-treated biomass reached 49.6% w/w. During the enzymatic hydrolysis trials with 3% w/w dry solids, the final hydrolysis yield reached up to 70.1%, which corresponded to the release of 7.8 g/L of glucose. Whereas, the final hydrolysis yield obtained during the high-gravity enzymatic hydrolysis reached up to 43.5%. The concentration of released glucose was in range of 33.3 – 40.0 g/L with a hemicellulose sugars in a range of 5.5 – 6.6 g/L. These values are suitable for downstream bioconversion processes and represent a significant improvement over existing steam pretreatment methods.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 341, article id 125855
Keywords [en]
Spruce bark, Organosolv fractionation, biorefinery, lignin, Tannin
National Category
Bioprocess Technology
Research subject
Biochemical Process Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-86930DOI: 10.1016/j.biortech.2021.125855ISI: 000696991200014PubMedID: 34523546Scopus ID: 2-s2.0-85114137990OAI: oai:DiVA.org:ltu-86930DiVA, id: diva2:1589476
Funder
Swedish Energy Agency, 2018-017714
Note

Validerad;2021;Nivå 2;2021-09-13 (alebob)

Available from: 2021-08-31 Created: 2021-08-31 Last updated: 2023-09-05Bibliographically approved

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Hrůzová, KateřinaMatsakas, LeonidasRova, UlrikaChristakopoulos, Paul

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