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Optimization of Laccase/Mediator System (LMS) Stage Applied in Fractionation of Eucalyptus globulus

Research Center in Technology of Products and Chemical Processes, PRO2TECS- Chemical Engineering Department, Campus “El Carmen”, University of Huelva, 21071 Huelva, Spain
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Polymers 2019, 11(4), 731; https://doi.org/10.3390/polym11040731
Received: 21 March 2019 / Revised: 11 April 2019 / Accepted: 18 April 2019 / Published: 22 April 2019
(This article belongs to the Special Issue Lignocellulosic Fibers and Films)
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Abstract

In a biorefinery framework, a laccase/mediator system treatment following autohydrolysis was carried out for eucalyptus wood prior to soda-anthraquinone pulping. The enzymatic and autohydrolysis conditions, with a view to maximizing the extraction of hemicelluloses while preserving the integrity of glucan, were optimized. Secondly, pulping of solid phase from Eucalyptus globulus wood autohydrolysis and the enzymatic process was carried out and compared with a conventional soda-anthraquinone (AQ) pulping process. The prehydrolysis and enzymatic delignification of the raw material prior to the delignification with soda- Anthraquinone (AQ) results in paper sheets with a lower kappa number and brightness and strength properties close to conventional soda-AQ paper and a liquid fraction rich in hemicellulose compounds that can be used in additional ways. The advantage of this biorefinery scheme is that it requires a lower concentration of chemical reagents, and lower operating times and temperature in the alkaline delignification stage, which represents an economic and environmental improvement over the conventional process. View Full-Text
Keywords: autohydrolysis; Eucalyptus globulus; laccase; hemicellulose; pulp; soda-AQ autohydrolysis; Eucalyptus globulus; laccase; hemicellulose; pulp; soda-AQ
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Loaiza, J.M.; Alfaro, A.; López, F.; García, M.T.; García, J.C. Optimization of Laccase/Mediator System (LMS) Stage Applied in Fractionation of Eucalyptus globulus. Polymers 2019, 11, 731.

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