Xylanase-assisted
TCF bleaching of Eulaliopsis binata pulp
Gautam Archana, Dutt Dharm and Kumar Amit
Res. J. Chem. Environ.; Vol. 29(4); 75-78;
doi: https://doi.org/10.25303/294rjce075078; (2025)
Abstract
The chlorine-containing bleaching chemicals are completely replaced with other oxidative
chemicals in total chlorine-free (TCF) bleaching. Moreover, the xylanase pretreatment
of pulp improves the efficiency of oxidative chemicals during TCF bleaching. Brightness
of E. binata ethanol-soda pulp increased by 2.5 and 1.4% (ISO) with A. flavus ARC-12
and S. commune ARC-11 xylanases pretreatment of pulp respectively compared to control
(without xylanase treatment).
The xylanases from both fungal strains improved the pulp viscosity significantly
compared to control. Tear index of xylanase treated pulp increased by 3.67 and 3.25%
by A. flavus ARC-12 and S. commune ARC-11 xylanases respectively compared to control
while burst index remained almost same. There is no generation of AOX and polychlorinated
dioxins as well as furans during TCF bleaching while optical and strength properties
of pulp were comparable to ECF bleaching process.
