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《CHINA PULP & PAPER》 2000-04
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Enzymatic Deinking of Old Newsprint

Qin Menghua Gao Peiji (State Key Laboratory of Microbial Technology,Shandong University,Jinan,250100) Shao Zhiyong Fu Yingjuan Wang Quan (Shandong Institute of Light Industry,Jinan,250100)  
Enzymatic deinking of old newsprint by several kinds of cellulases with different endoglucanases and cellobiohydrolases activities was studied and the industrial trial was carried out. The results show that endoglucanases are the essential cellulases in the old newsprint deinking,and the synergism of endoglucanases and cellobiohydrolases are beneficial to further improve brightness and drainability of the deinked pulp. Filter Paper Activity which is found in cellulases has detrimental effect on pulp strength, and the xylanase presented in the cellulases only have little effect. The enzymatic deinked pulp has higher brightness,similar tensile and slight lower tear strength compared with the chemical deinked pulp,and the enzymatic deinking process results in much lower COD and BOD content in the effluent. The laboratory result was verified by industrial trial of enzymatic deinking of old newsprint.
【CateGory Index】: TS724
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