WOOD PULP TREATMENT

摘要

A process using a multicomponent enzyme preparation to treat screened once refined pulps and reduces the specific energy consumption and/or increasing production while maintaining or increasing handsheet physical properties. The enzyme preparation has a major endoglucanase activity, a significant mannanase activity and a relatively small cellobiohydrolase activity. This enzyme mixture is prepared from a genetically modified strain of Trichoderma reseii.

主权项

1. A method of manufacturing a wood pulp, the method comprising:
exposing a mechanical wood pulp to an enzymatic solution comprising an endoglucanase (EG) and a cellbiohydrolase (CBH), wherein the ratio of enzymatic activity of EG:CBH is at least 3, for a sufficient amount of time to reduce energy consumption during subsequent refining of the exposed pulp in which the freeness of the pulp (CSF) is reduced by at least 10% in comparison to the freeness of the same pulp which has not been exposed to the enzymatic solution while at least maintaining the tensile strength of a handsheet produced from said subsequently refined pulp in comparison with a handsheet produced from the same pulp which has not been exposed to the enzymatic solution, the tensile strength being determined according to TAPPI standard T 205 sp-06.