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New strategies to bleach dissolving pulps using enzymatic treatments
Quintana, Elisabet; Valls Vidal, Cristina; Vidal Lluciá, Teresa; Roncero Vivero, María Blanca
Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria Paperera
A biobleaching sequence was applied to sulphite pulp in order to explore new bleaching possibilities using enzymatic treatments. Therefore, the well-known laccase-mediator system was used with the aim to achieve dissolving pulp characteristics. The enzymatic sequence was compared with a conventional hydrogen peroxide treatment in order to elucidate the effect of a laccase stage (L) for a potential industrial application. The treated pulps showed satisfactory results: high cellulose reactivity, high brightness and low content of hemicelluloses
Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera::Blanqueig de pastes
Wood-pulp--Bleaching
alkali resistance
brightness stability
carbohydrate composition
cellulose reactivity
dissolving pulp
Pasta de paper -- Blanqueig
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