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Issue 10, 2011
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High pressure pre-treatments promote higher rate and degree of enzymatic hydrolysis of cellulose

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Abstract

The effect of high pressure (HP) pre-treatments on the subsequent enzymatic hydrolysis of cellulose from bleached kraft Eucalyptus globulus pulp by cellulase from Tricoderma viride was evaluated. Pressure pre-treatments of 300 and 400 MPa during 5–45 min, lead to both an increased rate and degree of hydrolysis, reaching values ranging from 1.5- to 1.9-fold, quantified by the formation of reducing sugars. Both the pressure and time under pressure influenced the enzymatic hydrosability of the cellulosic pulps, with the former being more important. The results indicate that the pressure pre-treatments promoted an increased accessibility of cellulose towards cellulase in the cell wall. The results obtained open promising possibilities, to contribute to overcome conventional limitations of enzymatic cellulose hydrolysis for the production of fermentable glucose, for the production of second generation bioethanol and chemicals by enhancement of both rate and yield of hydrolysis. The results are also of interest for the preparation of “pressure engineered” celullose with incremented tailored hydrolysis patterns.

Graphical abstract: High pressure pre-treatments promote higher rate and degree of enzymatic hydrolysis of cellulose

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Article information


Submitted
03 May 2011
Accepted
30 Jun 2011
First published
08 Aug 2011

Green Chem., 2011,13, 2764-2767
Article type
Paper

High pressure pre-treatments promote higher rate and degree of enzymatic hydrolysis of cellulose

A. R. F. C. Ferreira, A. B. Figueiredo, D. V. Evtuguin and J. A. Saraiva, Green Chem., 2011, 13, 2764
DOI: 10.1039/C1GC15500H

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