Effect of Hornbeam chips fungal pre-treatment on bleachability of its Bio-kraft pulp | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 7, Volume 30, Fall 3 - Serial Number 52, August 2015, Pages 419-429 PDF (1.36 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2015.12999 | ||
| Authors | ||
| Esmaeil Rasooly Garmaroody* 1; Iraj Mohammadi2 | ||
| 1Assistant Prof., Department of Cellulose and Paper Technology, Shahid Beheshti University, Zirab campus, Mazandaran, Iran | ||
| 2M.Sc., Department of Cellulose and Paper Technology, Shahid Beheshti University, Zirab campus, Mazandaran, Iran | ||
| Abstract | ||
| 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. | ||
| Keywords | ||
| DED sequence; Bleachability; Bio-kratf pulp; Fungal pre-treatment; hornbeam | ||
| References | ||
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