论文部分内容阅读
研究了不同漆酶对桉木硫酸盐浆的脱木素效率,实验结果表明,Trametes versicolor漆酶具有最高的脱木素效率;将其应用于ECF漂白中,不仅可提高浆的漂白效果,还可降低ClO_2用量,尤其在漆酶处理后,用E_pADE_PD流程(A为酸处理)漂白浆料,ClO_2用量降低得更多。实验时也将木聚糖酶-漆酶处理后的浆料应用于ECF漂白中,漂白时木聚糖酶和漆酶采用依次或同时加入的方式加入到漂白系统中,然后进行DE_pD漂白;实验发现,无论木聚糖酶和漆酶采用何种方式加入,与参比浆样相比,两种情况下ClO_2用量均降低很多;若在木聚糖酶-漆酶处理后再用酸处理,ClO_2用量会降低得更多。处理后浆的性能与参比浆样性能相近。
The delignification efficiency of eucalyptus kraft pulp with different laccases was studied. The experimental results show that Trametes versicolor laccase has the highest delignification efficiency. When applied to ECF bleaching, it can not only improve the pulp bleaching effect, but also Can reduce the amount of ClO_2, especially after the laccase treatment, bleaching slurry with E_pADE_PD flow (A is acid treatment), the amount of ClO_2 is reduced more. Xylanase-laccase-treated slurries were also used in the ECF bleaching experiments. Xylanase and laccase were added to the bleaching system in bleaching system after bleaching, followed by DE_pD bleaching. Experiments It was found that regardless of the manner in which xylanase and laccase were added, the amount of ClO 2 was significantly reduced in both cases compared to the reference pulp; if the treatment was followed by treatment with xylanase-laccase, The amount of ClO_2 will be reduced more. The performance of the treated pulp is similar to that of the reference pulp.