Application of enzymes in producing bleached pulp from wheat straw
Application of enzymes in producing bleached pulp from wheat straw
复制标题
酶在麦草生产漂白纸浆中的应用
DOI：
10.1016/j.biortech.2005.07.012
复制
发表时间：
2006-09-01
影响因子：
11.4
通讯作者：
Qu, Yinbo
中科院分区：
文献类型：
--
作者：
Zhao, Jian;Li, Xuezhi;Qu, Yinbo
将不同菌株所产粗酶用于漂白麦草浆的生产。在木聚糖酶用量为4 IU/g时，预处理可使纸浆卡伯值分别降低6.29%和12.07%。粗酶液中纤维素酶活力过高对制浆有不利影响。木聚糖酶预漂白可使氯用量减少20- 30%，或使最终白度增加约4- 5%ISO，并改善纸浆强度性能。木聚糖酶可代替碱抽提法处理化学漂白浆，提高漂白浆的强度。用3 IU/g木聚糖酶对漂白浆进行改性，纸浆白度和裂断长分别比原浆提高3- 6%ISO和160-790 m，后色值和打浆度分别比原浆降低29- 3 - 6%和2.5-5.5度SR。(c)2005爱思唯尔有限公司保留所有权利。
Crude enzymes produced by different strains were used in the production of bleached wheat straw pulp. Pre-treatment with enzymes from Penicillium A10 and Aspergillus L22 at a xylanase dosage of 4 IU/g prior to pulping decreased pulp kappa number by 6.29% and 12.07% respectively as compared to the control. High cellulase activity in crude enzymes has a negative influence on pulping. Xylanase pre-bleaching reduced chlorine charge by 20-30%, or increased final brightness by approximately 4-5% ISO, and improved the pulp strength properties. Xylanase could substitute for alkali extraction in CEH sequence, and be used for treating chemical-bleached pulp, which resulted in higher strength properties for bleached pulp. Modification of bleached pulp with enzymes of 3 IU/g (on xylanase) increased pulp brightness and breaking length by 3-6% ISO and 160-790 m respectively, and decreased post color number and beating degree of pulp by 29-36% and 2.5-5.5 degrees SR respectively, as compared to the original pulp. (c) 2005 Elsevier Ltd. All rights reserved.