Kinetics of enzyme action of cartazyme NS-10 prior to bleaching of kraft pulp

The kinetics of enzyme treatment of hardwood kraft pulp with commercial xyl anase Cartazyme NS-10 was investigated. The enzyme treatment process was fo und to follow closely the topochemical modified equation of Prout-Tompkins. The influence of the initial enzyme concentration was studied and the appl icability of the power kinetic equation was established for the initial rat e of the process. An equation of practical use was obtained, which provides the temperature function of the amount of the reducing substances, dependi ng on the enzyme initial concentration. This function made it possible to c ontrol the process of prior enzyme treatment of unbleached kraft pulp. (C) 2001 Elsevier Science B.V. All rights reserved.