Abstract :
The potential of extracellular xylanase produced by Aspergillus oryzae through solid state fermentation was investigated on banana fibre pulp bleaching in association with conventional bleaching with chlorine dioxide. The maximum enzyme production was obtained at 30°C after 48 hrs of incubation using wheat bran substrate. Highest enzyme activity 1136 IU/g dry substrate was found under optimized condition. Banana fibre pulp were pretreated with different dose of xylanase enzyme before the conventional bleaching sequence. Xylanase pre-treatment reduce the kappa no and enhance the optical and physical properties of pulp. The maximum reduction in kappa no were 1.3 unit at the dose of 30 IU/g. Xylanase treatment also improve burst index, tensile index and double fold by11.81 per cent, 5.7 pera cent and 2.8 per cent, respectively.
Keyword :
Aspergillus oryzae, Xylanase, Biobleaching, solid-state fermentation