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Kraft pulping of Drimys winteri wood chips biotreated with Ganoderma australe

2005; Wiley; Volume: 81; Issue: 2 Linguagem: Inglês

10.1002/jctb.1383

1097-4660

Heriberto Franco, Juanita Freer, Jaime Rodríguez, Jaime Baeza, Juan Pedro Elissetche, Regis Teixeira Mendonça,

Biocrusts and Microbial Ecology

Abstract Drimys winteri , a native hardwood from Chile, presents some interesting characteristics that make it suitable for the pulp and paper industry. In this work, the potential of D winteri for the conventional kraft and biokraft pulp production was evaluated. For biokraft pulping, wood chips were biotreated with the white‐rot fungus Ganoderma australe . During the biotreatment, a selective pattern of biodelignification was observed and the wood chips biotreated for 15, 30 and 45 days were submitted to kraft cooking. At low cooking severity ( H ‐factor below 1500 h −1 , 15% active alkali and 25% sulfidity), all biopulps presented lower kappa numbers than control pulps and approximately the same screened pulp yield. Biopulps were easily refined in a PFI mill, requiring less PFI revolutions to achieve the same fibrillation degree. The strength properties of the biopulps were similar to those of the control pulps. Copyright © 2005 Society of Chemical Industry