Influence of process variables on the properties of laccase biobleached pulps

A laccase stage can be used as a pre-treatment of a standard chemical bleaching sequence to reduce environmental concerns associated to this process. The importance of each independent variable and its influence on the properties of the bleached pulp have been studied in depth in this work, using an adaptive network-based fuzzy inference system (ANFIS) with four independent variables (laccase, buffer, mediator and oxygen) as input. Eucalyptus globulus kraft pulp was biobleached using a laccase from Pycnoporus sanguineus and a natural mediator (acetosyringone). Later, an alkaline extraction and a hydrogen peroxide treatment were applied. Most biobleaching processes showed a decrease in kappa number and an increase in brightness with no significant impact on the viscosity values, compared with the control. Oxygen was the variable with the smallest influence on the final pulp properties while the laccase and buffer solution showed a significant influence.

Bibliographic Details

Main Authors:	Martin-Sampedro, R., Miranda, J., García-Fuentevilla, L. L., Hernández, M., Arias, M. E., Diaz, M. J., Eugenio Martín, María Eugenia
Format:	artículo biblioteca
Language:	English
Published:	Springer 2015
Subjects:	Biobleaching, Laccases, Pycnoporus sanguineus, Bleaching variables, Neural networks optimization,
Online Access:	http://hdl.handle.net/20.500.12792/2811 http://hdl.handle.net/10261/292294
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