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Twenty-Sixth Symposium on Biotechnology for Fuels and Chemicals pp 171–181Cite as

Sugarcane Bagasse Pulps

Biobleaching with Commercial Cartazyme HS and with Bacillus pumilus Xylanase

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Abstract

Organosolv (ethanol/water and acetosolv) pulps were treated with Bacillus pumilus xylanase for 4,8, and 12 h and compared with commercial Cartazyme HS xylanase-treated pulps. Treatment of ethanol/water pulps with B. pumilus xylanase increased viscosity by 40% in 8 h of treatment compared with pulps treated without enzyme. However, acetosolv pulps treated with B. pumilus xylanase lost viscosity. Ethanol/water pulps treated with Cartazyme had a viscosity of 18.5 cP in 4 h of treatment. In the acetosolv pulps treated with commercial enzyme, the loss of viscosity was 20% compared with pulps treated without enzyme. Ethanol/water pulps treated with B. pumilus and Cartazyme had similar effects: a 44% reduction in kappa number for pulps treated with enzyme followed by alkaline extraction compared with pulps treated with alkaline extraction. In acetosolv pulps treated with B. pumilus, the kappa number was from 12 to 18, compared with pulps treated without enzyme, which had a 40% reduction in 4 and 12 h and a 60% reduction in 8 h. Cartazyme-treated acetosolv pulps had a kappa number of 14 in 4 and 8 h of treatment. For 12 h of treatment, the kappa number was 8. Fourier transform infrared spectra of the pulps showed that enzyme-treated pulps had changes in the 1000 cm−1 absorption owing to a C-O bond present in esters. Using principal component analysis, it is possible to differentiate the unbleached pulps and enzyme-treated pulps.

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Author information

Authors and Affiliations

  1. Departamento de Biotecnologia, FAENQUIL, PO Box 116, Lorena, 12600-970, SP, Brazil

    Regina Y. Moriya & Adilson R. Gonçalves

  2. CPQBA/UNICAMP, PO Box 6171, Campinas, 13081-970, SP, Brazil

    Marta C. T. Duarte

Authors
  1. Regina Y. Moriya
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  2. Adilson R. Gonçalves
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  3. Marta C. T. Duarte
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Editor information

Editors and Affiliations

  1. Oak Ridge National Laboratory, USA

    Brian H. Davison  & Barbara R. Evans  & 

  2. National Renewable Energy Laboratory, USA

    Mark Finkelstein  & James D. McMillan  & 

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© 2005 Humana Press Inc.

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Moriya, R.Y., Gonçalves, A.R., Duarte, M.C.T. (2005). Sugarcane Bagasse Pulps. In: Davison, B.H., Evans, B.R., Finkelstein, M., McMillan, J.D. (eds) Twenty-Sixth Symposium on Biotechnology for Fuels and Chemicals. ABAB Symposium. Humana Press. https://doi.org/10.1007/978-1-59259-991-2_15

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