Biobleaching of softwood kraft pulp by white-rot fungi and its related enzymes

Nobuyuki Katagiri, Yuji Tsutsumi, Tomoaki Nishida

Research output: Contribution to conferencePaperpeer-review

Abstract

Manganese peroxidase (MnP) production during biobleaching of unbleached softwood kraft pulp (SWKP) by Phanerochaete chrysosporium was much lower than that of unbleached hardwood kraft pulp (HWKP). Furthermore, in vitro, isolated MnP cannot degrade residual lignin in SWKP without addition of Mn(II), though it can degrade that in HWKP. These differences are due to that SWKP does not contain enough manganese ion for ligninolytic system. Trametes versicolor produced more laccase but delignify SWKP less than P. chrysosporium did. Lignin peroxidase (LiP) was not detected during biobleaching of SWKP by both fungi. Therefore, other enzyme(s) except MnP, laccase, and LiP may be contribute to the delignification under Mn(II)-insufficient condition.

Original languageEnglish
PagesF5-1-F5-4
Publication statusPublished - Jan 1 1997
Externally publishedYes
EventProceedings of the 1997 9th International Symposium on Wood and Piping Chemistry, ISWPC. Part 1 (of 2) - Montreal, Can
Duration: Jun 9 1997Jun 12 1997

Other

OtherProceedings of the 1997 9th International Symposium on Wood and Piping Chemistry, ISWPC. Part 1 (of 2)
CityMontreal, Can
Period6/9/976/12/97

All Science Journal Classification (ASJC) codes

  • Computer Science(all)

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