中文摘要：

研究了木聚糖酶预处理HD漂白麦草浆的效果。结果表明：Au—PE89木聚糖酶预处理麦草浆的最佳条件为：酶用量50g／t，温度50℃，时间90～120min，pH值7.0。在HD漂白工艺中增加木聚糖酶预处理段，可使纸浆白度提高2．6％ISO，漂白废液CODcr含量减少约50％。

英文摘要：

The effect of xylanase pretreatment on HD bleaching wheat straw pulp is investigated. The results show that the optimal technological condition for pretreatment with AU-PE89 xylanase is： xylanase charge 50g/t, temperature 50℃, time 90 - 120min and pH value 7.0. The brightness of xylanase pretreated pulp after HD bleaching was increased by 2.6%ISO and the COD content in the bleaching effluent reduced Cr by approximately 30%.