کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6376830 1624854 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new lignocellulosic biomass deconstruction process combining thermo-mechano chemical action and bio-catalytic enzymatic hydrolysis in a twin-screw extruder
ترجمه فارسی عنوان
یک فرآیند بازسازی زیست توده لجنس سلولی با ترکیب شیمیایی حرارتی مونو و هیدرولیز آنزیمی زیست کاتالیزوری در یک اکسترودر دوقلو
کلمات کلیدی
محصول مشترک ذرت شیرین، آگاوا آبی باگاس آبی، کمربند نخل روغن، نی کاه، اکسترودر دوقلو، هیدرولیز آنزیمی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی


- New lignocellulosic biomass deconstruction process was evaluated on four biomasses.
- Process combines thermo-mechano-chemical and the bio-catalytic action in extruder.
- Saccharification begins during bioextrusion.
- The process is efficient despite the variability of biomass characteristics.
- Deconstruction process does not generate toxic compounds penalizing fermentation.

A new process for the deconstruction of lignocellulosic biomass was evaluated. It combines thermo-mechano-chemical action and the bio-catalytic action of enzymatic hydrolysis in a twin-screw extruder. The process proceeds in three phases all conducted in a twin-screw extruder: an alkaline pretreatment, a neutralization phase and an enzyme impregnation phase during which hemicelluloses and cellulose saccharification begins. Four model feedstocks with high cellulose content have been selected for the study: sweet corn residue (SC), a co-product of industrial corn grain canning; blue agave bagasse (BAB) from the manufacture of tequila; oil palm empty fruit bunch (OPEFB), a residue from palm oil manufacture, and barley straw (BS). They are all agricultural or agro-industrial processing by-products, although their morphological origin, chemical composition and physical structure differ. Their differences in behavior are studied throughout the process, and their cell wall constituents, hemicelluloses, cellulose and lignin, quantified. The enzymatic hydrolysis of the four feedstocks ranged from 8 to 26% of dry matter and reached 26 to 68% of dry matter after alkaline pretreatment depending on the particular biomass. The process allows preparation of high dry matter content (>20%) cellulosic material for saccharification. The continuous treatment allows extraction of a large part of the hemicelluloses (up to 64% for SC), configures cellulose for better accessibility, and initiates cellulose depolymerization by the enzyme cocktail during bioextrusion. This new process is advantageous because it minimizes energy consumption by operating at a low temperature, minimizes water consumption by working at a low liquid/solid ratio and is fast and adaptable to different biomasses.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Industrial Crops and Products - Volume 55, April 2014, Pages 258-266
نویسندگان
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