کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10999741 | 1415894 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ethanol production from coffee mucilage fermentation by S. cerevisiae immobilized in calcium-alginate beads
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Soluble sugars in coffee mucilage were directly fermented into ethanol using immobilized Saccharomyces cerevisiae cells in calcium alginate beads. Several tests were performed via alginate-entrapped cells in different bead sizes (3 or 7â¯mm) combined to alginate concentrations (2-4%). The highest yield of 0.33â¯gâ¯ethanol/gâ¯sugar was achieved at 18â¯h using alginate-entrapped cells in 3â¯mm diameter and 2% (w/v) alginate, which corresponded to 64% of the theoretically achievable yield of ethanol. Tests with 7â¯mm beads took 6â¯h longer to reach maximum ethanol productions. The reduction of bead size increased mass transfer of substrates from the liquid to the immobilized cells, accelerating sugar consumption and ethanol production. Entrapment enabled reuse of the cells for up to 3 consecutive batches with stable ethanol production (up to 72â¯h). This work confirms the reuse of alginate-entrapped cells is feasible for ethanol fermentation of mucilage without supplement of nutrients.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology Reports - Volume 3, September 2018, Pages 200-204
Journal: Bioresource Technology Reports - Volume 3, September 2018, Pages 200-204
نویسندگان
David Orrego, Arley David Zapata-Zapata, Daehwan Kim,