Method for performing ECF bleaching on bamboo pulp with assistance of bio-enzyme pretreatment

The invention discloses a method for performing ECF bleaching on bamboo pulp with assistance of bio-enzyme pretreatment. The method includes the first step of xylanase pretreatment, the second step of laccase pretreatment and the third step of ECF bleaching, wherein the third step of ECF bleaching includes the procedures of D0-stage bleaching, EP-stage alkali extraction and D1-stage bleaching. By means of the method, the whiteness of bleached bamboo pulp is increased by 9.1%-15.3%, the AOX formation quantity of bleaching wastewater is lowered by 26.9%-38.6%, and pollution to the environment is reduced. Compared with the prior art, the method has the advantages of increasing the whiteness of sulphate bamboo pulp bleached in an ECF mode, lowering the AOX formation quantity of bleaching wastewater, reducing pollution to the environment and enabling wastewater discharge of pulping and papermaking enterprises to meet wastewater discharge requirements of new national standards of China.