【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。更多还原

【Abstract】 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.更多还原