摘要
以白色链霉菌为实验菌种,诱导其在产酶培养基上所产胞外酶对三倍体毛白杨KP浆进行生物漂白,摸索出最佳工艺条件:酶用量5IU·g-1、温度60℃、时间120min、浆浓6%、pH值7.0,表明该菌所产胞外酶具有一定热稳定性和耐碱性,对纸浆漂白十分有利。如再接后续漂白段,可进一步提高纸浆白度和黏度,降低卡伯值,改善纸浆可漂性。
Biobleaching of triploide Chinese poplar kraft pulps with the enzyme produced by Streptomyces albus was investaged. It was found that the optimum conditions of the treatment were as following： enzyme dosage 5IU·g^-1,pH 7.0, pulp consistency 6% and 60℃ for 120 minutes. It showed the stability to hot and alkaline, this was beneficial to the bleaching of the pulp. Connecting with the following bleaching segments, it could show a further increase in pulp brightness and DP and a further drop in kappa values. The bleachability of the treated pulps was improved.
出处
《纸和造纸》
北大核心
2007年第3期63-65,共3页
Paper and Paper Making
基金
北京林业大学振兴计划人才培养专项课题(200304017)。
