麦草KP浆LMS脱木质素的研究

STUDY ON DELIGNIFICATION OF WHEAT STRAW KRAFT PULP WITH LACCASE-MEDIATOR SYSTEM

采用漆酶 媒介所组成的系统对麦草KP浆脱木质素进行了研究 ,采用正交实验的方法探讨了反应时间、温度和酶用量等因素对脱木质素效果的影响规律 ,找到了较好的LMS脱除麦草KP浆木质素的工艺条件。

Delignification of wheat straw kraft pulp with laccase mediator system(LMS) and the affecting factors including reaction time, temperature, dosage of laccase mediator on delignification were studied in this paper. The results indicate that in all of these factors, reaction time is of primary importance followed by temperature and dosage . By using LMS, Kappa number of wheat straw kraft pulp can be reduced seriously but reduction of viscosity is lower. The optimum conditions for the delignification of wheat straw kraft pulp with LMS are∶reaction time 30 min , temperature 70 ℃ and dosage 0.07%. Under these conditions,30% delignification ratio can be obtained and the reduction of viscosity is only 15.3%.