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Comparison of different chemical-free pretreatment methods for the production of sugars, ethanol and methane from lignocellulosic biomass

dc.contributor.authorSjulander, Nikki
dc.contributor.authorRooni, Vahur
dc.contributor.authorRocha-Meneses, Lisandra
dc.contributor.authorKikas, Timo
dc.contributor.departmentEstonian University of Life Sciences. Institute of Forestry and Engineering. Chair of Biosystems Engineeringeng
dc.date.accessioned2023-07-19T09:05:53Z
dc.date.available2023-07-19T09:05:53Z
dc.date.issued2023
dc.descriptionReceived: February 19th, 2023 ; Accepted: June 3rd, 2023 ; Published: July 3rd, 2023 ; Correspondence: nikki.sjulander@emu.ee, timo.kikas@emu.eeeng
dc.description.abstractMost pretreatment methods for lignocellulosic biomass use strong chemicals, such as sulphuric acid and ammonia, to open up the cellular structure of plant biomass. However, those chemicals are not environmentally friendly and their use leads to safety risks. As a result, different chemical-free pretreatment methods have been developed, which focus on the usage of pressure, high or low temperatures and mild chemicals. Freezing pretreatment and explosive decompression pretreatments, using different operating gases, such as nitrogen and steam, are compared in the context of glucose, ethanol and methane yield in this review. For the methane production, the stillage from bioethanol production is used. The usage of this waste improves the overall valorisation of lignocellulosic biomass. The review also investigates, whether the nitrogen explosive decompression pretreatment is suitable for the treatment of softwoods, hardwoods and herbaceous materials. In the comparison of different chemical-free pretreatment methods, it is concluded that heat and water are the most influential parameters for opening up the lignocellulosic biomass structure. The operating gas and pressure in the pretreatment reactor are less relevant. Steam explosion, nitrogen explosive decompression pretreatment and autohydrolysis pretreatment are the most suitable chemical-free pretreatment methods for lignocellulosic biomass.eng
dc.identifier.issn2228-4907
dc.identifier.publicationAgronomy Research, 2023, vol. 21, no. 2, pp. 928–939eng
dc.identifier.urihttp://hdl.handle.net/10492/8555
dc.identifier.urihttps://doi.org/10.15159/ar.23.060
dc.publisherEstonian University of Life Scienceseng
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)eng
dc.rightsinfo:eu-repo/semantics/openAccesseng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectanaerobic digestioneng
dc.subjectbiofuelseng
dc.subjectfermentationeng
dc.subjectlignocellulosic inhibitorseng
dc.subjectsteam explosioneng
dc.subjectarticleseng
dc.titleComparison of different chemical-free pretreatment methods for the production of sugars, ethanol and methane from lignocellulosic biomasseng
dc.typeinfo:eu-repo/semantics/articleeng

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