Mitigation of adsorbable organic halides in combined effluents of wheat straw soda-AQ pulp bleached with cellulase-poor crude xylanases of coprinellus disseminatus in elemental chlorine free bleaching

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作者：

Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur 247001, India ^{[1
]}

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来源：

Cellul Chem Technol | / 1-2卷 / 127-135期

关键词：

Biobleaching - Bleaching effluent - Combined effluents - Coprinellus disseminates - Elemental chlorine-free bleaching - Organic halides - Strength property - Wheat straw pulp;

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摘要：

Novel cellulase-poor crude xylanases from strains SH-1 NTCC-1163 (enzyme-A), and SH-2 NTCC-1164 (enzyme-B) of Coprinellus disseminatus, mitigated kappa number (56.27 and 58.41%) of wheat straw soda-AQ pulp after OX AE and OXBE bleaching stages, respectively. Significant reductions in AOX (25.00 and 22.05%), with a slight decrease in some strength properties, owing to removal of hemicelluloses, was observed. The removal of hemicelluloses was further validated by an increase in pulp viscosity (6.82 and 4.93%), COD (43.15 and 43.15%) and colour (51.99 and 62.99%) for OX AE1D1E2D2 and OX BE1D1E2D2 sequences, respectively, compared to their respective controls. Compared to controls, AOX reduction was higher in OXAE1DE2P (38.75%) and OXBE1DE2P (36.25%) than OXAE 1D1E2D2 (25.00%) and OX BE1D1E2D2 (22.05%) bleached pulps, but at the cost of brightness. AOX, COD and colour were significantly reduced on the 6th day of incubation of combined bleaching effluents.

引用

共 5 条

[1] MITIGATION OF ADSORBABLE ORGANIC HALIDES IN COMBINED EFFLUENTS OF WHEAT STRAW SODA-AQ PULP BLEACHED WITH CELLULASE-POOR CRUDE XYLANASES OF COPRINELLUS DISSEMINATUS IN ELEMENTAL CHLORINE FREE BLEACHING
Singh, Shalini
Dutt, Dharm
CELLULOSE CHEMISTRY AND TECHNOLOGY, 2014, 48 (1-2): : 127 - 135
[2] ENVIRONMENTALLY FRIENDLY TOTALLY CHLORINE FREE BLEACHING OF WHEAT STRAW PULP USING NOVEL CELLULASE-POOR XYLANASES OF WILD STRAINS OF COPRINELLUS DISSEMINATUS
Singh, Shalini
Dutt, Dharm
Tyagi, C. H.
BIORESOURCES, 2011, 6 (04): : 3876 - 3882
[3] Bio-conventional bleaching of wheat straw soda-AQ pulp with crude xylanases from SH-1 NTCC-1163 and SH-2 NTCC-1164 strains of Coprinellus disseminatus to mitigate AOX generation
Singh, Shalini
Dutt, Dharm
Tyagi, C. H.
Upadhyaya, J. S.
NEW BIOTECHNOLOGY, 2011, 28 (01) : 47 - 57
[4] Bio-conventional bleaching of kadam kraft-AQ pulp by thermo-alkali-tolerant xylanases from two strains of Coprinellus disseminatus for extenuating adsorbable organic halides and improving strength with optical properties and energy conservation
Lal, Mohan
Dutt, Dharm
Tyagi, C. H.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY, 2012, 28 (04): : 1375 - 1387
[5] Bio-conventional bleaching of kadam kraft-AQ pulp by thermo-alkali-tolerant xylanases from two strains of Coprinellus disseminatus for extenuating adsorbable organic halides and improving strength with optical properties and energy conservation
Mohan Lal
Dharm Dutt
C. H. Tyagi
World Journal of Microbiology and Biotechnology, 2012, 28 : 1375 - 1387

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