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dc.contributor.authorQuintana, Elisabet
dc.contributor.authorValls Vidal, Cristina
dc.contributor.authorVidal Lluciá, Teresa
dc.contributor.authorRoncero Vivero, María Blanca
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera
dc.date.accessioned2015-11-18T09:00:16Z
dc.date.issued2015
dc.identifier.citationQuintana, E., Valls, C., Vidal, T., Roncero, M. Endoglucanase treatments for improving pulp reactivity in biobleached and commercial dissolving pulps. A: International Symposium on Wood, Fiber and Pulping Chemistry. "18th ISWFPC: International Symposium on Wood, Fiber and Pulping Chemistry: Vienna, Austria: September 09-11th, 2015: proceedings". Vienna: 2015, p. 296-299.
dc.identifier.urihttp://hdl.handle.net/2117/79389
dc.description.abstractIn this study, a bleached commercial dissolving pulp and a TCF sulphite pulp, bleached at the laboratory scale with a laccase–violuric acid system and complemented with a pressurized hydrogen peroxide stage (LVAPO), were treated with two endoglucanases, one obtained from Paenibacillus barcinonensis (B) and the other one produced from Cerrena unicolor (F), with the intention to improve cellulose reactivity. The B enzyme was used at 120 U/g oven dried pulp (odp) and the F enzyme at 12 and 60 U/g odp. In addition, a purification treatment, i.e. a cold caustic extraction (CCE) at 9% w/v NaOH, was applied before or after the respective hydrolytic treatments in order to reduce the global amount of hemicelluloses. Testing commercial dissolving pulp let to observe that both cellulases increased Fock solubility, although in a different way. Thus, B caused no scissions in the cellulose chain and no significant reduction in fibre length, whereas F strongly decreased viscosity and shortened fibre length, leading to lower reactivity. However, the most salient contribution was the combination of a biobleaching sequence involving a laccase-mediator system (LMS) which provided an environmentally friendly process without detracting the final characteristics of a dissolving pulp, and the subsequent endoglucanase treatment (L_B120) which reached a 91% of Fock solubility
dc.format.extent4 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera
dc.subject.lcshWood-pulp--Bleaching
dc.subject.lcshCellulase
dc.subject.otherBiobleached pulp
dc.subject.othercellulase
dc.subject.othercold caustic extraction
dc.subject.otherdissolving pulp
dc.subject.otherFock solubility
dc.titleEndoglucanase treatments for improving pulp reactivity in biobleached and commercial dissolving pulps
dc.typeConference lecture
dc.subject.lemacCel·lulasa
dc.subject.lemacPasta de paper -- Blanqueig
dc.contributor.groupUniversitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera
dc.rights.accessRestricted access - publisher's policy
drac.iddocument17233521
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
upcommons.citation.authorQuintana, E., Valls, C., Vidal, T., Roncero, M.
upcommons.citation.contributorInternational Symposium on Wood, Fiber and Pulping Chemistry
upcommons.citation.pubplaceVienna
upcommons.citation.publishedtrue
upcommons.citation.publicationName18th ISWFPC: International Symposium on Wood, Fiber and Pulping Chemistry: Vienna, Austria: September 09-11th, 2015: proceedings
upcommons.citation.startingPage296
upcommons.citation.endingPage299


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