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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13167
Title: Bio-conventional bleaching of kraft-AQ pulp of A. cadamba by crude xylanases from Coprinellus disseminatus MLK-03 and effect of residual enzyme on effluent load
Authors: Lal M.
Dutt, Dharm
Tyagi C.H.
Kaur H.
Kumar A.
Published in: BioResources
Abstract: A new thermo-alkali-tolerant crude xylanase from Coprinellus disseminatus decreased kappa number by 34.38% and improved brightness and viscosity by 1.6 and 6.47% respectively after XE1-stage during prebleaching of Anthocephalus cadamba kraft-AQ pulp. At 2.4% chlorine demand, crude xylanase in a XECEHH (X= enzymatic prebleaching stage, E= extraction stage, C= chlorination stage, H= hypochlorite stage) bleaching sequence improved pulp brightness, tensile index, burst index, and double fold numbers by 3.66%, 4.78%, 6.38%, and 11.11%, respectively with a reduction in viscosity (10.59%) and tear index (10.77%) compared to the control. Combined bleach effluent of the XECEHH sequence mitigated adsorable organic halides (AOX) by 21% and increased chemical oxygen demand (COD), biochemical oxygen demand (BOD), and colour by 67.18%, 84.78%, and 97.53%, respectively, compared to the control. Residual enzymes that entered during enzymatic prebleaching stage decreased AOX, COD, BOD, and colour of combined effluent of the XECEHH bleaching sequence progressively and on 6th day, and these were reduced by 23.78%, 0.04%, 15.00%, and 0.61%, respectively, compared to the control.
Citation: BioResources (2011), 6(2): 1019-1028
URI: http://repository.iitr.ac.in/handle/123456789/13167
Issue Date: 2011
Keywords: Anthocephalus cadamba
CEHH bleaching
Coprinellus disseminates
Effluent characteristics
Pulp and paper
Residual enzymes
ISSN: 19302126
Author Scopus IDs: 8626233500
7005982560
6602705260
55553726762
57206266862
Author Affiliations: Lal, M., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India
Dutt, D., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India
Tyagi, C.H., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India
Kaur, H., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India
Kumar, A., Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India
Corresponding Author: Dutt, D.; Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur campus, Saharanpur 247 001, India; email: dharm_dutt@yahoo.com
Appears in Collections:Journal Publications [PT]

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