Kraft Pulp Bleaching and Delignification by Dikaryons and Monokaryons of Trametes versicolor
نویسندگان
چکیده
منابع مشابه
Manganese Peroxidase, Produced by Trametes versicolor during Pulp Bleaching, Demethylates and Delignifies Kraft Pulp.
Previous work has shown that Trametes (Coriolus) versicolor bleaches kraft pulp brownstock with the concomitant release of methanol. In this work, the fungus is shown to produce both laccase and manganese peroxidase (MnP) but not lignin peroxidase during pulp bleaching. MnP production was enhanced by the presence of pulp and/or Mn(II) ions. The maximum level of secreted MnP was coincident with ...
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Laccase-catalyzed oxygen delignification of kraft pulp offers some potential as a replacement for conventional chemical bleaching and has the advantage of requiring much lower pressure and temperature. However, chemical mediators are required for effective delignification by laccase, and their price is currently too high at the dosages required. To date, most studies have employed laccase from ...
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The cultivation of Trametes versicolor for laccase production and cell growth were strongly dependent on experimental conditions namely physical and chemical parameters as well as nutrient availability and inducer stimulation. Biomass growth was compared for a rich medium and for a defined medium in two different temperatures. The best temperature was 28ºC and the maximum specific growth rates ...
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of Gasification of Black Liquor Char by actions of Some Sulfur Compounds, Inorg. Steam, IEC Research 30(7): 1594 (1991). Chem. 22(22):3243 (1983). 26. DEARNALEY, R.I., KERRIDGE, D.H. and 27. ZOU, X., Recovery of Kraft Black Liquor ROGERS, D.J., Molten Lithium Sulfate-SoIncluding Direct Causticization, Ph.D. Metallurgical Trans. B 19B(2):73 (1988). Thesis, McGill Univ. (1991). 28. WYNNYCKYJ, J.R...
متن کاملDelignification of eucalypt kraft pulp with manganese-substituted polyoxometalate assisted by fungal versatile peroxidase.
Oxidation of the manganese-substituted polyoxometalate [SiW(11)Mn(II)(H(2)O)O(39)](6-) (SiW(11)Mn(II)) to [SiW(11)Mn(III)(H(2)O)O(39)](5-) (SiW(11)Mn(III)), one of the most selective polyoxometalates for the kraft pulp delignification, by versatile peroxidase (VP) was studied. First, SiW(11)Mn(II) was demonstrated to be quickly oxidized by VP at room temperature in the presence of H(2)O(2) (K(m...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1993
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.59.1.266-273.1993