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Effect of dose of xylanase on bleachability of sugarcane bagasse ethanol/water pulps

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Abstract

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.

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Authors and Affiliations

  1. Departamento de Biotecnologia, FAENQUIL, CP 116, CEP 12.600-970, Lorena, SP, Brazil

    Denise S. Ruzene & Adilson R. Gonçalves

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  1. Denise S. Ruzene
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  2. Adilson R. Gonçalves
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Correspondence to Adilson R. Gonçalves.

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Ruzene, D.S., Gonçalves, A.R. Effect of dose of xylanase on bleachability of sugarcane bagasse ethanol/water pulps. Appl Biochem Biotechnol 108, 769–774 (2003). https://doi.org/10.1385/ABAB:108:1-3:769

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  • DOI: https://doi.org/10.1385/ABAB:108:1-3:769

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