Modification of Loblolly Pine Chips with Ceriporiopsis subvermispora Part 2: Kraft Pulping of Treated Chips |
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Authors: | Laura L. Villalba Leland R. Schroeder |
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Affiliation: | Paper and Bioprocess Engineering Faculty, College of Environmental Science and Forestry , State University of New York , Syracuse, New York, USA |
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Abstract: | Abstract Loblolly pine (Pinus taeda) chips treated with Ceriporiopsis subvermispora for two or four weeks were pulped with different combinations of kraft pulping conditions to obtain a better understanding of the interaction between the fungal action and the pulping variables. Two different levels of effective alkali (18 or 22%), two times at maximum Tmax (60 or 90 min), 22% sulfidity, and a Tmax of 170°C, were used. The best delignification without adversely affecting pulp viscosity was found in pulps made from chips treated with the fungus for 2 weeks and at the mildest pulping conditions. At all pulping conditions there was a substantial decrease in the amount of rejects with 2 weeks of fungal treatment. Pulps from fungally‐treated chips refined more easily than the control pulp and strength properties of pulps of fungally‐treated chips were superior to those of the control pulp. |
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Keywords: | Ceriporiopsis subvermispora white‐rot fungus loblolly pine kraft pulping kappa number lignin carbohydrates viscosity refining strength properties |
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