为降低漂白成本,采用5种不同预处理方法对未漂硫酸盐阔叶木浆进行实验,预处理后的浆料均采用D(EP)D漂序进行漂白。结果表明,采用预处理方法可以在D1段获得漂白净成本的节约,但要使浆料白度达到89%,仍需进行D(EP)DD四段漂白。其中,预处理方法包括弱酸性预处理、木聚糖酶预处理、未漂浆过氧化氢预处理、酸性未漂浆过氧化氢预处理和木聚糖酶-酸性过氧化物预处理。研究发现,采用酶预处理和采用低用量酸性过氧化氢预处理,在D1段漂白到79.1%的白度时,可产生净成本节约。采用酶预处理在全漂浆白度达到89%时可产生成本净节约。 In order to reduce the bleaching cost, five different pretreatment methods were used to test the unbleached kraftwood hardwood pulp. The pretreated pulp was bleached by D (EP) D. The results show that the pretreatment method can be used to obtain the net cost of bleaching in section D1. However, the four stage bleaching of D (EP) DD is still required to achieve a whiteness of 89%. Among them, the pretreatment methods include weak acid pretreatment, xylanase pretreatment, unbleached hydrogen peroxide pretreatment, acidic unbleached hydrogen peroxide pretreatment and xylanase - acid peroxide pretreatment. The study found that using enzyme pretreatment and pretreatment with low levels of acid hydroperoxide resulted in net cost savings when bleached to 79.1% whiteness at D1. Using enzyme pretreatment in the whole bleached whiteness of 89% can produce a net cost savings.