Characterization of a cellulase-free xylanase producing Bacillus sp for biobleaching of kraft pulp

被引：0
|
作者：
Tavares, VB [1 ]
Gomes, E [1 ]
Da Silva, R [1 ]
机构：
[1] UNESP, IBILCE, Lab Bioquim Proc & Microbiol Aplicada, BR-15054000 Sao Jose Rio Preto, SP, Brazil
来源：
REVISTA DE MICROBIOLOGIA | 1997年 / 28卷 / 03期
关键词：
xylanase; kraft pulp; biobleaching;
D O I：
暂无
中图分类号：
Q93 [微生物学];
学科分类号：
071005 ; 100705 ;
摘要：
Application of the xylanase in the pulp bleaching process has been shown to be effective in decreasing the amount of chlorinating agents in the process and improving the brightness of the pulp. The use of thermostable cellulase-free xylanase might enhance both the technical and economic feasibility of the process. In this work an alkalophylic strain of Bacillus sp 77-2, was isolated which showed a high production of xylanase and free cellulases. The xylanase of Bacillus sp displayed an optimum pH of 6.0 (with 70% activity at pH 9.0), all optimum temperature of 60 degrees C, pH stability in the range 5-10 and thermal stability of 50 degrees C. These characteristics are important to the kraft pulp bleaching because they are similar to those found in the industrial paper environment.
引用
收藏
页码：179 / 182
页数：4
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