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Title
Comparative kinetic analysis of enzyme hydrolysis of steam-exploded wheat straw
Authors
G. RADEVA I. VALCHEV S. PETRIN E. VALCHEVA and P. TSEKOVA
Received
August 29, 2011
Published
Volume 46 Issue 1-2 January-February
Keywords
wheat straw, cellulose, cellulase, exponential equation, correlations, compensation effect
Abstract
The present work represents a comparative kinetic analysis of enzyme hydrolysis, using two kinetic variables to describe both reducing sugars and glucose. The preliminary treatment of wheat straw by steam explosion was followed by enzyme hydrolysis using the NS 50013 and ?-glucosidase NS 50010 enzyme cellulase complex. The hydrolysis has been described by an exponential kinetic equation valid for processes developed on uniformly inhomogeneous surfaces. The wheat straw–enzyme system has been observed to behave as an energetically homogeneous one. The preexponential factor decreased with the increase of the hydrolysis degree, some kind of compensation effect between the change of activation energy and the preexponential factor being derived. The isokinetic temperature at which a complete compensation was observed was calculated, the rates of reducing sugars and glucose formation being equal.
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