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Kinetic modeling of the enzymatic hydrolysis of pretreated cellulose

✍ Scribed by G. Caminal; J. López-Santín; C. Solà

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
434 KB
Volume
27
Category
Article
ISSN
0006-3592

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✦ Synopsis

The production of sugars by the enzymatic hydrolysis of cellulose is a two-step process that includes conversion of the intermediate cellobiose to glucose by p-glucosidase. The hydrolysis was followed by analyzing the two sugar products (cellobiose and glucose). The enzyme showed maximum activity at pH 4.8. Thermal deactivation was significant at temperatures above 45°C. At 50°C (optimum temperature) thermal deactivation was found to follow first-order kinetics. Several models were tested by modeling the kinetics of the reaction. Their parameter values were determined by numerical optimization, including temperature dependence. The best fitting model was a competitive product inhibition for the two reactions in the operational range.

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