کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7063996 1459819 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of screw elements on enzymatic digestibility of corncobs after pretreatment in a twin-screw extruder
ترجمه فارسی عنوان
اثرات عناصر اسکرول بر قابلیت هضم آنزیمی کرانکوپ ها پس از پیش آزمون در یک اکسترودر دوقلو
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
Extrusion of lignocellulosic biomasses can be an effective physical continuous pretreatment method towards bioethanol production. Extrusion processes would typically precede enzymatic cellulose saccharification in a given pretreatment. The screw configuration determines the functionality of the extruder and different screw elements (conveying, kneading and reverse) can have different effects on enzymatic digestibility. This study investigates the effects of individual functional screw elements on enzymatic digestibility after extrusion. It was found that extrusion enhanced enzymatic digestibility under all tested condition. Reverse and kneading screw elements however resulted in lignin re-distribution over the cellulose fibres, blocked pores (shown via SEM) and resulted in less digestible biomass, compared to conveying screw elements. Lignin removal via NaOH reversed this effect and the highest digestibility was found for biomass extruded in the presence of reverse screw elements (the most severe conditions tested in this study), indicating that lignin redistribution can counteract otherwise positive effects of extrusion pretreatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 74, March 2015, Pages 224-232
نویسندگان
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