Screening of Variables in Xylanase Recovery Using BDBAC Reversed Micelles

  • E. M. G. Rodrigues
  • A. PessoaJr.
  • A. M. F. Milagres
Part of the Applied Biochemistry and Biotechnology book series (ABAB)


Xylanase recovery by reversed micelles using cationic surfactant (N-ben-zyl-N-dodecyl-N-bis(2-hydroxyethhyl)ammonium chloride) BDBAC was evaluated under different experimental conditions. A full factorial design with center point was employed to verify the influence of different factors on the recovery. A mathematical model was found to represent the xylanase yield (Y) as a function of BDBAC and hexanol: Y = 4.32 + 5. lB + 2.64D + 0.83B2 1.46D2, where B = BDBAC and D = hexanol. The highest xylanase recovery (27%), indicated by the model was attained at pH = 8.1, BDBAC = 0.38 M and hexanol = 8.6%. Under these conditions, and to test the model, a new xylanase extraction was performed in laboratory, giving 29.4% recovery yield, this value was similar to that predicted by the model.

Index Entries

Reversed micelles xylanase liquid-liquid extraction statistical design 


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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • E. M. G. Rodrigues
    • 1
  • A. PessoaJr.
    • 1
  • A. M. F. Milagres
    • 1
  1. 1.Department of BiotechnologyFaculty of Chemical Engineering of Lorena 12.600-000LorenaSP-Brazil

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