ECF and TCF bleaching of Saccharum officinerum-CO89003 bagasse soda-AQ pulp with alkali-thermo-tolerant crude xylanase from Coprinellus disseminatus SW-1 NTCC1165

ECF and TCF bleaching of Saccharum officinerum-CO89003 bagasse soda-AQ pulp with alkali-thermo-tolerant crude xylanase from Coprinellus disseminatus SW-1 NTCC1165

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An alkali-thermo-tolerant crude xylanase from Coprinellus disseminatus SW-1 NTCC1165 produced under solid-state fermentation conditions improves the brightness of sugarcane bagasse soda-AQ pulp by 7.3, 4.7, 6.

1, and A numerical treatment based on Bernoulli Tau method for computing the open-loop Nash equilibrium in nonlinear differential games 8.2% in XODED, XOD(EOP)DP, OX(EOP)P, and XO(EOP)P bleaching sequences, respectively, at an enzyme dose of 8IU/g, a reaction time of 120 min, a consistency of 10%, and a pH of 6.4 at 55 oC.

An improvement in brightness by 2.1% for pulp bleached by XO(EOP)P compared to OX(EOP)P sequence validates that xylanase treatment is more effective for hydrolysing lignin-carbohydrates complexes before oxygen treatment.AOX after XODED and XOD(EOP)DP sequences is reduced by 41.

43 and 40%, respectively, compared to controls, but an increase in COD and color in studied bleaching sequences is attributable to the hydrolysis of hemicelluloses and the release of lignin-carbohydrates complexes after xylanase treatment.Xylanase treatment modifies fibre surface by Experimental study on performance of rubber-fly ash-based mine floor fissure grouting material introducing cracks, peelings, swelling, and external fibrillation, which facilitates faster penetration of bleach chemicals by disrupting physical barriers, as revealed by scanning electron microscopy.