Introduction
Pulp and paper industries have been considered as major
polluting units across the world (Sumathi and Hung, 2006; Ratia
et al., 2012). Different processes such as the pulp bleaching,
deinking, production of colored paper etc. contribute to the pollution
caused by these industries. Last decade has seen an increase in
the number of studies focusing on the possible pollution reduction,
alternative waste treatment technologies, and waste management
(Monte et al., 2009).
Recently, utilization of microbial enzyme xylanase for pulpbleaching