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Effect of Enzyme-assisted Refining on the Properties of Bleached Softwood Pulp
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Author NameAffiliation
YangYang Peng1 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640, China 
Hao Liu1 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640, China 
ShiYu Fu1,* 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640, China 
XinLiang Li2 2. Youtell Biochemical Co., Ltd., Yueyang, Hu’nan Province, 414009, China 
Fund Project:The authors are grateful for financial support from the National Natural Science Foundation of China (31570569).
 
Abstract:Enzymatic pretreatment of pulp is demonstrated to be potentially effective for decreasing the energy consumption in the refining process. Herein, a neutral cellulase was utilized for the pretreatment of bleached softwood pulp in order to improve the refining performance. Cellulase pretreatment effectively improved the drainability of the pulp and could thus reduce the energy consumption in the refining process. The beating degree of the pulp was significantly improved at 6000 PFI revolutions, at which a maximum increase of 70% could be obtained. The water retention value (WRV) of the pulp increased by 17% after treatment with cellulase at a dosage of 5 IU/g, and the fibers could be easily torn apart after enzymatic treatment. To achieve the same beating degree, the refining time could be shortened by 80% when the pulp was treated with cellulase. Using a low dosage of cellulase, the freeness of the pulp increased rapidly without deterioration of the mechanical properties.
keywords:cellulase pretreatment  refining  physical properties  energy consumption
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