Effect of Enzyme Pretreatments on Wheat Straw NaOH-AQ Pulping

摘要

Pretreatments of xylanase, laccase/HBT and cellulase prior to wheat straw NaOH-AQ cooking decrease pulp Kappa number and increase pulp brightness. The pulp pretreated by each kind of enzyme above, especially xylanase or laccase/HBT has higher tensile and tear index and better bleachability than the control pulp. The synergism of laccase/HBT and xylanase further decreases Kappa number of pulp with higher strength properties.