Effect of Hornbeam chips fungal pre-treatment on bleachability of its Bio-kraft pulp

تحقیقات علوم چوب و کاغذ ایران

Esmaeil Rasooly Garmaroody¹  Iraj Mohammadi² 

[1] Assistant Prof., Department of Cellulose and Paper Technology, Shahid Beheshti University, Zirab campus, Mazandaran, Iran;M.Sc., Department of Cellulose and Paper Technology, Shahid Beheshti University, Zirab campus, Mazandaran, Iran;

关键词: DED sequence;    Bleachability;    Bio-kratf pulp;    Fungal pre-treatment;    HORNBEAM;   

DOI  :  10.22092/ijwpr.2015.12999

来源: DOAJ

【 摘 要 】

Bio-kraft pulp made from Hornbeam chips fungal pre-treated (1, 2 and 3 weeks) was used for investigation of its bleachability by DED sequence. Before and after of each step in mentioned sequence, pulps and bleaching spent liquors characterized and then 60g/m2 standards handsheets made from above pulps and tested in optical properties. Results shown that by increasing in chips pre-treatment time, lignin contents of pulps is more lacked by passing of DED sequence steps. Also, pulp viscosity and DP are lacked by increasing in pre-treatment time simultaneously increasing in hexenuronic acids and this is due to not full selectivity of fungle. Fungal pre-treatment of chips has not significant effect on brightness of unbleached pulps but due to softening in lignin structure, could be improved bleaching process as with increasing in pre-treatment time brightness increased and opacity decreased in final paper. Generally, it seems that Hornbeam chips fungal pre-treatment has good efficiency on its pulp bleachability although chemical consumption in bleaching increased up to 3 weeks pre-treatment.

【 授权许可】

Unknown