桉木硫酸盐浆木聚糖酶漂白适性及纤维素酶对漂白浆质量的影响  

Xylanase Pretreatment in Eucalyptus KP Bleaching

作　　者：黄峰[1] 陈嘉翔[1] 高培基[2] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广州510641 [2]山东大学微生物技术国家重点实验室,济南250100

出　　处：《中国造纸学报》1997年第B12期57-63,共7页Transactions of China Pulp and Paper

摘　　要：用黑曲霉（Aspengillusniger，An76）产生的合少量纤维素酶的木聚糖酶及H2O2和EDTA等对不同卡伯值的桉木硫酸盐浆进行漂白，同时利用层析分离获得An76酶中无纤维素酶杂质的木聚糖酶活性组分CFX进行对比实验，结果表明酶漂适性随未漂浆卡伯值降低而提高，纤维素酶的存在是造成木聚糖酶漂白中漂白浆粘度下降的根本原因，其活性与漂后废液中葡萄糖与木糖糖基比值变化具有正相关性。Eucalyptus KP of three different kappa No. levels were pretreated with xylanase isolated fromAspergillus niger strain An76, hydrogen peroxide and EDTA were added to the xylanase for the pre-bleaching. Some of the crude xylanase (X) contaminated by cellulase was purified to give cellulase free xylanase(CFX). Both cellulase contaminated xylanase (X) and cellulase free xylanaes (CFX) were experimented forthe pre-bleaching of eucalyptus KP. Results obtained indicated that crude xylanase (X) gave better bleachingeffects with pulps of a lower kappa number level. The presence of small quantities of cellulase in the crudexylanase tended to give a pulp with lower viscosity. It is interesting to note that the activity of the cellulasecontaminated xylanase exhibited a direct proportionality with the percentage of glucose in the treatment effluent.

关 键 词：桉木 硫酸盐浆 漂白浆 卡伯值 纤维素酶 木聚糖酶 木糖 组分 粘度 黑曲霉 

分 类 号：TS745[轻工技术与工程—制浆造纸工程] TQ925[轻工技术与工程—发酵工程]