Effect of dose of xylanase on bleachability of sugarcane bagasse ethanol/water pulps.
Pulps obtained from the ethanol/water cooking of sugarcane bagasse were bleached with the xylanase enzyme obtained from the fungus Thermomyces lanuginosus IOC-4145 and with the commercial enzyme Cartazyme HS from Sandoz. By changing the enzyme dose from 4.3 to 36 IU/g of pulp, kappa number and viscosity were maintained when the xylanase from T. lanuginosus was used. On the other hand, by using Cartazyme HS, kappa number decreased by 17%, reaching 35.5. This pulp was further extracted with NaOH without a decrease in viscosity (10 cP), and pulp with a kappa number of 13 was obtained. Xylanases had no significant effect on the ethanol/water pulps.
Departamento de Biotecnologia, FAENQUIL, CP 116, CEP 12.600-970 Lorena, SP, Brazil.
Denise S
DS
Ruzene
Adilson R
AR
Gonçalves
D001203:Ascomycota / Q000201:enzymology*; D002482:Cellulose / Q000378:metabolism*; D000431:Ethanol; D007700:Kinetics; D014783:Viscosity; D014867:Water; D043325:Xylan Endo-1,3-beta-Xylosidase; D014995:Xylosidases / Q000302:isolation & purification / Q000378:metabolism*
D014867:Water; D000431:Ethanol; D002482:Cellulose; C027433:bagasse; D014995:Xylosidases; D043325:Xylan Endo-1,3-beta-Xylosidase