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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13254
Title: Environmentally friendly totally chlorine free bleaching of wheat straw pulp using novel cellulase-poor xylanases of wild strains of Coprinellus disseminatus
Authors: Singh S.
Dutt, Dharm
Tyagi C.H.
Published in: BioResources
Abstract: Cellulase-poor crude xylanases of Coprinellus disseminatus, strains SH-1 NTCC 1163 (enzyme-A) and SH-2 NTCC 1164 (enzyme-B) produced under optimum conditions of solid-state fermentation (SSF), were used in bio-bleaching of wheat straw soda-AQ pulp in totally chlorine free (TCF) bleaching sequences. Kappa number reductions of 56% and 58% with respect to oxygen-delignified pulps were obtained after the sequences OX AE and OX BE, respectively. Significant increases in pulp brightness of 6.07% (enzyme-A) and 3.34% (enzyme-B) with slight decreases in some strength properties (due to the removal of hemicelluloses) were observed. Removal of hemicelluloses was further validated by an increase in pulp viscosity (6.07%, and 4.58%), COD (40%, and 38%), and facilitation of lignin removal, as indicated by colour values (48% and 45%) for OX AEQPP and OX BEQPP bleached pulps, respectively, over the control. Crude xylanases from C. disseminatus SH-1 NTCC 1163 and SH-2 NTCC 1164 can successfully be used for TCF bleaching of pulps owing to their high temperature and pH toleranance, and cellulase-poor nature, thus adding to the search for environment-friendly bleaching solutions for the pulp and paper industry.
Citation: BioResources (2011), 6(4): 3876-3882
URI: http://repository.iitr.ac.in/handle/123456789/13254
Issue Date: 2011
Keywords: Coprinellus disseminatus
Pulp and paper
TCF bleaching
Wheat straw
ISSN: 19302126
Author Scopus IDs: 7406402372
7005982560
6602705260
Author Affiliations: Singh, S., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247001, India
Dutt, D., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247001, India
Tyagi, C.H., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247001, India
Corresponding Author: Singh, S.; Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247001, India; email: shalinisingh.iit@gmail.com
Appears in Collections:Journal Publications [PT]

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