| Autor: |
Spiridonov, I., Yotova, L., Georgieva, N., Petkova, E., Boeva-Spiridonova, R. |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
BioResources, Vol 2, Iss 1, Pp 34-40 (2007) |
| Druh dokumentu: |
article |
| ISSN: |
1930-2126 |
| Popis: |
The aim of the present work is to obtain a chemical-mechanical pulp (CMP) from poplar wood with improved properties, to be used in packing papers in place of more expensive softwood or hardwood pulp. For improving the CMP quality indicators, a preliminary treatment of the pulp has been carried out with a mixture of oxidizing enzymes produced from Phanerochaete chrysosporium, including lignin peroxidase, manganese peroxidase, and laccase. The two types of fiber materials obtained were double-stage bleached and then ground to 30oSR. It was found that preliminary enzyme treatment yielded CMP with improved physical, mechanical, and optical properties. The enzyme-pretreated CMP also refined faster, thus reducing the electricity consumption. Bleached CMP from poplar wood, obtained after preliminary enzyme treatment, could be successfully utilized at levels up to 40% in the composition of various packaging papers. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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