کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686715 889115 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Application of enzymes in producing bleached pulp from wheat straw
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Application of enzymes in producing bleached pulp from wheat straw
چکیده انگلیسی

Crude enzymes produced by different strains were used in the production of bleached wheat straw pulp. Pre-treatment with enzymes from Penicillium A10 and Aspergillus L22 at a xylanase dosage of 4 IU/g prior to pulping decreased pulp kappa number by 6.29% and 12.07% respectively as compared to the control. High cellulase activity in crude enzymes has a negative influence on pulping. Xylanase pre-bleaching reduced chlorine charge by 20–30%, or increased final brightness by approximately 4–5% ISO, and improved the pulp strength properties. Xylanase could substitute for alkali extraction in CEH sequence, and be used for treating chemical-bleached pulp, which resulted in higher strength properties for bleached pulp. Modification of bleached pulp with enzymes of 3 IU/g (on xylanase) increased pulp brightness and breaking length by 3–6% ISO and 160–790 m respectively, and decreased post color number and beating degree of pulp by 29–36% and 2.5–5.5 °SR respectively, as compared to the original pulp.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 97, Issue 13, September 2006, Pages 1470–1476
نویسندگان
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