کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1744205 1522133 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Xylanase from Penicillium meleagrinum var. viridiflavum – a potential source for bamboo pulp bleaching
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Xylanase from Penicillium meleagrinum var. viridiflavum – a potential source for bamboo pulp bleaching
چکیده انگلیسی


• Maximum xylanase production by Penicillium meleagrinum at optimum pH and temperature.
• Effect of xylanase on crystallinity and delignification of the bamboo pulp.
• Xylanase enzyme enhances the bleach ability of the pulp and increases brightness.
• Changes in pulp fibre morphology and characteristics due to xylanase treatment.

The effect of enzymatic process on pulp bleaching using a potential lignolytic fungus Penicillium meleagrinum has been investigated in order to minimize the consumption of chemicals in bleaching process. Xylanase enzyme extracted from P. meleagrinum was studied and the maximum xylanase production by P. meleagrinum was recorded as 5.74 U/mL at 30 °C and at 5.5 pH. The extracted xylanase was applied to the unbleached bamboo pulp alone or in combination with hydrogen peroxide to find out the efficacy of the enzyme on pulp bleaching. Xylanase pre-treatment can remove a considerable amount of lignin from unbleached pulp which can further be reduced by giving a treatment with 2% hydrogen peroxide. Xylanase pre-treated peroxide bleaching reduces lignin content from 10.55% to 3.25% in unbleached bamboo pulp. The kappa number of pulp decreases from 13.50 to 8.50 with the increase of pulp brightness 68–69%, viscosity 8.94 cP and crystallinity of the pulp cellulose to 62.05%. Scanning electron micrographs reveal uniform fibre with occasional pores and cracks on the surface.The results of the present study have been found encouraging which may aid in the development of new cleaner and alternative method of bleaching for pulp and paper industry.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 116, 10 March 2016, Pages 259–267
نویسندگان
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