Results 121 to 130 of about 289 (151)

Partial delignification of unbleached kraft pulp with ligninolytic fungi

Biotechnology Letters, 1979
Unbleached kraft pulp is partially delignified on incubation under specified conditions with ligninolytic fungi, thereby decreasing requirements for bleaching chemicals. Studies withPhanerochaete chrysosporium demonstrated important effects of nutrient nitrogen and molecular oxygen concentrations. Possible approaches to rate enhancement are suggested.
T. Kent Kirk, H. H. Yang
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Use of Xylanase and Rabinofuranosidase for Arabinose Removal from Unbleached Kraft Pulp

Biotechnology Letters, 2005
Preparations of arabinofuranosidase and xylanase, respectively from Aureobasidium pullulans and Trichoderma longibrachiatum, were used to remove selectively xylose and arabinose from kraft pulp. The equilibrium moisture content of pulps treated with both enzymes, at varying relative humidities, revealed a consistently lower percent moisture content at ...
H P, Makkonen, J P, Nakas
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UASB performance for bleached and unbleached kraft pulp synthetic wastewater treatment

Chemosphere, 2005
This paper presents the performance of two bench scale Upflow Anaerobic Sludge Blanket reactors (UASB) used for the treatment of synthetic substrates that simulate bleached and unbleached cellulose pulp plant wastewaters. The control reactor was fed with diluted black liquor and the treatment reactor with the same substrate plus a mixture of ...
A P, Buzzini, E P, Gianotti, E C, Pires
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Recycling performance of softwood and hardwood unbleached kraft pulps for packaging papers

TAPPI Journal, 2023
The scope of this work is to evaluate the recyclability potential of hardwood and softwood unbleached kraft pulps, leading to a sound basis for comparison and even to support a decision about fibers according to the performance achieved. The influence of successive recycling cycles (up to 10 cycles) on the fiber morphology, pulp suspension drainability,
Rogério M.S. Simões, Catarina I.A. Ferreira, FIlipa Pires, Margarida Martins, Ana Ramos, António P.M. Sousa, Paula C.R. Pinto, Ricardo Jorge   +7 more
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Sulfur makeup in an unbleached kraft pulp mill

TAPPI Journal
Sodium sesquisulfate or “sesqui” (Na3H(SO4)2) is a by-product of chlorine dioxide production at kraft pulp mills. It is typically used for sodium and sulfur makeup in the liquor loop. Mondi Hinton Inc. (MHI) in Hinton, AB, Canada, was converting from bleached to unbleached kraft pulp production and was thus losing this source of makeup. The only option
MEHUL BIPIN CHAUHAN, THOMAS PENNER, THEODORE RADIOTIS, MICHAEL PALEOLOGOU   +3 more
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Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp

Holzforschung, 2001
Summary An approach to a chromophore composition study using the direct size-exclusion chromatography (SEC-UV) analysis of an alkaline extract of pulp fibre walls is described. Absorbance in the 290–405 nm range of 2% and 18% NaOH extract from unbleached pulps obtained by conventional and extended kraft delignification of black alder wood ...
T. Bikova, V. Klevinska, T. Eremeeva, A. Treimanis   +3 more
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Surface Characterization of Unbleached and Oxygen Delignified Kraft Pulp Fibers

Journal of Wood Chemistry and Technology, 2003
The chemical and morphological surface properties of different unbleached and oxygen delignified softwood kraft pulp fibers were evaluated by using different ESCA and SEM techniques. The results of the different techniques have revealed that the surface of unbleached and oxygen delignified kraft pulp fibers has a higher content of lignin and in some ...
Magnus Paulsson, Anette Heijnesson Hultén   +1 more
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Residual extractives in unbleached aspen and pine kraft pulps and their fate on oxygen delignification

Nordic Pulp and Paper Research Journal, 2006
Chul-Hwan Kim
exaly   +2 more sources

Wet strength improvement of unbleached kraft pulp through laccase catalyzed oxidation

Enzyme and Microbial Technology, 2001
Previous investigations have shown that laccase catalyzed oxidation of lignin containing wood fibers can enhance the strength of medium density fiberboards. In the present work it was investigated if laccase treatment had any impact on the tensile strength of a high yield unbleached kraft pulp. Treatment with laccase alone had only a very little effect
Lund, M., Felby, C.
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Binding affinities of different metal ions to unbleached hardwood kraft pulp

Holzforschung, 2011
No abstract ...
Pingping Su, Kim Granholm, Leo Harju, Ari Ivaska   +3 more
openaire   +1 more source