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Abstract:

Loblolly pine kraft pulp was bleached in a totally chlorine-free sequence that involved treatment with culture supernatants from the white-rot fungus Trametes trogii followed by a peroxide stage. The whole process was performed at 28 °C, and did not require mediator addition in the enzymatic stage. Different operating conditions in the peroxide stage (pH, peroxide concentration and treatment time), were tested by using response surface methodology based on a Doehlert experimental design, in order to describe their effects and normalize a biobleaching protocol. The results showed that all three independent variables had significant effect on the luminance (L*) and Chroma (C*) of the enzyme-treated pulp. Best results were obtained after 1 h of enzyme incubation (352 U laccase, 2 U Mn-peroxidase per g of oven-dry pulp), followed by 96 h treatment with 2.5% hydrogen peroxide in sodium succinate buffer pH 6 (5% consistency). We obtained a noteworthy increase in L* = 94.45 (compared with 94.5 of the white reference standard (titanium oxide), 69.94 of the initial pulp, and 83.11 of the peroxide-bleached control), a decrease in C* (9.85), with minor pulp yield loss (less than 5%), under essentially mild conditions, using a low-cost source of enzyme. © 2009 Elsevier Inc. All rights reserved.

Registro:

Documento: Artículo
Título:Biobleaching of loblolly pine kraft pulp with Trametes trogii culture fluids followed by a peroxide stage. Application of Doehlert experimental design to evaluate process parameters
Autor:Da Re, V.; Papinutti, L.; Forchiassin, F.; Levin, L.
Filiación:Lab. de Micología Experimental, Dpto. de Biodiversidad y Biología Experimental, Fac. Cs. Exactas y Naturales, Pabellón II, C1428EHA, Buenos Aires, Argentina
Palabras clave:Biobleaching; Laccase; Luminance; Mn-peroxidase; Softwood kraft pulp; Trametes trogii; Biobleaching; Buffer pH; Doehlert; Experimental design; Independent variables; Laccase; Laccases; Loblolly pine; Operating condition; Peroxide concentration; Process parameters; Pulp yield loss; Reference standard; Response Surface Methodology; Sodium succinate; Softwood kraft pulps; Supernatants; Totally chlorine-free; Treatment time; White-rot fungus trametes; Whole process; Bleaching; Chlorine; Cleaning; Enzymes; Hydrogen peroxide; Kraft process; Manganese; Manganese compounds; Oxidation; pH effects; Sodium; Softwoods; Statistics; Titanium; Titanium oxides; Kraft pulp; chlorine; hydrogen peroxide; laccase; peroxidase; peroxide; succinic acid; titanium dioxide; article; bleaching; controlled study; culture medium; experimental design; incubation time; loblolly pine; luminance; nonhuman; pH; response surface method; supernatant; temperature; time; Trametes; Trametes trogii; white rot fungus; wood pulp; Biobleaching; Bleaching; Chlorine; Cleaning; Enzymes; Hydrogen Peroxide; Kraft Pulps; Laccase; Manganese; Manganese Compounds; Oxidation; Sodium; Softwood Pulps; Softwoods; Statistics; Titanium; Funalia trogii; Fungi; Pinus taeda
Año:2010
Volumen:46
Número:3-4
Página de inicio:281
Página de fin:286
DOI: http://dx.doi.org/10.1016/j.enzmictec.2009.12.006
Título revista:Enzyme and Microbial Technology
Título revista abreviado:Enzyme Microb. Technol.
ISSN:01410229
CODEN:EMTED
CAS:chlorine, 13981-72-1, 7782-50-5; hydrogen peroxide, 7722-84-1; laccase, 80498-15-3; peroxidase, 9003-99-0; peroxide, 14915-07-2; succinic acid, 110-15-6; titanium dioxide, 1317-70-0, 1317-80-2, 13463-67-7, 51745-87-0
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01410229_v46_n3-4_p281_DaRe

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Citas:

---------- APA ----------
Da Re, V., Papinutti, L., Forchiassin, F. & Levin, L. (2010) . Biobleaching of loblolly pine kraft pulp with Trametes trogii culture fluids followed by a peroxide stage. Application of Doehlert experimental design to evaluate process parameters. Enzyme and Microbial Technology, 46(3-4), 281-286.
http://dx.doi.org/10.1016/j.enzmictec.2009.12.006
---------- CHICAGO ----------
Da Re, V., Papinutti, L., Forchiassin, F., Levin, L. "Biobleaching of loblolly pine kraft pulp with Trametes trogii culture fluids followed by a peroxide stage. Application of Doehlert experimental design to evaluate process parameters" . Enzyme and Microbial Technology 46, no. 3-4 (2010) : 281-286.
http://dx.doi.org/10.1016/j.enzmictec.2009.12.006
---------- MLA ----------
Da Re, V., Papinutti, L., Forchiassin, F., Levin, L. "Biobleaching of loblolly pine kraft pulp with Trametes trogii culture fluids followed by a peroxide stage. Application of Doehlert experimental design to evaluate process parameters" . Enzyme and Microbial Technology, vol. 46, no. 3-4, 2010, pp. 281-286.
http://dx.doi.org/10.1016/j.enzmictec.2009.12.006
---------- VANCOUVER ----------
Da Re, V., Papinutti, L., Forchiassin, F., Levin, L. Biobleaching of loblolly pine kraft pulp with Trametes trogii culture fluids followed by a peroxide stage. Application of Doehlert experimental design to evaluate process parameters. Enzyme Microb. Technol. 2010;46(3-4):281-286.
http://dx.doi.org/10.1016/j.enzmictec.2009.12.006