Affiliation:
1. Department of Forest Products, Faculty of Agriculture, Kyushu University, Fukuoka 812, Japan
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.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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