根据混合办公废纸脱墨浆抗张强度、白度和尘埃度3个指标,得到优化的纤维素酶脱墨工艺:酶用量1.2 U·g-1,酶处理时间15 min,浆浓度9%,温度55~60℃,碎浆时间8 min,乳化剂用量0.05%,pH 4.5~5。通过对浆料脱墨前后的性能比较分析,发现纤维素酶不仅能有效去除附着在纤维表面的油墨粒子,并且对纤维有一定的降解作用。 According to the three indexes of tensile strength, whiteness and dust degree of mixed office waste paper deinked pulp, the optimal cellulase deinking process was obtained: enzyme dosage 1.2 U · g-1, enzyme treatment time 15 min, pulp concentration 9% , Temperature 55 ~ 60 ℃, pulping time 8 min, emulsifier dosage 0.05%, pH 4.5 ~ 5. By comparing the performance of the pulp before and after deinking, it was found that cellulase not only can effectively remove the ink particles attached to the surface of the fiber, but also degrade the fiber.