Bleaching of Hardwood Kraft Pulp with Manganese Peroxidase Secreted from Phanerochaete sordida YK-624
- 1 December 1994
- journal article
- research article
- Published by American Society for Microbiology in Applied and Environmental Microbiology
- Vol. 60 (12) , 4359-4363
- https://doi.org/10.1128/aem.60.12.4359-4363.1994
Abstract
In vitro bleaching of an unbleached hardwood kraft pulp was performed with manganese peroxidase (MnP) from the fungus Phanerochaete sordida YK-624. When the kraft pulp was treated with partially purified MnP in the presence of MnSO 4 , Tween 80, and sodium malonate with continuous addition of H 2 O 2 at 37°C for 24 h, the pulp brightness increased by about 10 points and the kappa number decreased by about 6 points compared with untreated pulp. The pulp brightness was also increased by 43 points to 75.5% by multiple (six) treatments with MnP combined with alkaline extraction. Our results indicate that in vitro degradation of residual lignin in hardwood kraft pulp with MnP is possible.Keywords
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