Pulp biobleaching and MNP production by the white rot fungus bjerkandera BOS55 in the absence of manganese

摘要

Manganese and manganese peroxidase (MnP) are considered essential for kraft pulp biolbleaching by white rot fungi. However, biobleaching of EDTA extracted eucalytus oxygen delignified kraft pulp by the white rot fungus Bjerkandera sp. BOS55 does not require Mn. Fungal organic acid metabolites (e.g. oxalate and gloycolate) added to the Mn-free culture medium were found to be stimulatory for brightnes gains, delignification and MnP production.