PRODUCTION, CHARACTERIZATION, AND APPLICATION OF THE CELLULASE-FREE XYLANASE FROM ASPERGILLUS-NIGER

The effects of carbon source on xylanase and cellulase production were studied. The extract of steam-exploded corn stover was found to be th e best raw material for producing cellulase-free xylanase. The xylanol ytic enzymes of Aspergillus niger An-76 were purified by chromatograph y, and the properties of the four purified components were analyzed. W hen the enzyme was used to treat the birch Kraft pulp, and followed by a subsequent CEH bleaching, a brightness of 6.8% SBD more than that o f the untreated one using the same chlorine dosage, or a saving of nea rly 50% of chlorine consumption with the same brightness, was realized .