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The objective of the present work was to evaluate the water hyacinth (WH) as a substrate for the production of hydrolytic enzymes (cellulases and hemicellulases) of 100 strains of filamentous fungi under conditions of solid growth. Five fungal strains, identified as Trichoderma harzianum, Trichoderma atroviride, Penicillium griseofulvum, Penicillium commune and Aspergillus versicolor, were selected...
The maximum yield of xylanase from Aureobasidium melanogenum PBUAP46 was 5.19 ± 0.08 U ml−1 when cultured in a production medium containing 3.89% (w/v) rice straw and 0.75% (w/v) NaNO3 as carbon and nitrogen sources, respectively, for 72 h. This enzyme catalyzed well and was relatively stable at pH 7.0 and room temperature (28 ± 2 °C). The produced xylanase was used to hydrolyze xylans from four tropical...
Xylanase is widely used in pulp and paper bleaching. In this study, the effects of rare earth ions (La3+, Ce3+, Er3+ and Gd3+) on the activity of xylanase produced by Penicillium are investigated and the application of a xylanase solution containing La3+ in paper bleaching is presented. Our results indicate that the bleaching effect of the enzyme solution containing La3+ was markedly better when the...
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