کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5761869 1624802 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phenolic compounds removal from sweet sorghum grain for efficient biobutanol production without nutrient supplementation
ترجمه فارسی عنوان
حذف ترکیبات فنل از دانه سورگوم شیرین برای تولید بیوبتانول کارآمد بدون مکمل مواد مغذی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Industrial scale production of biobutanol has been hampered by substrate cost and availability. Sweet sorghum grain is an inexpensive substrate for acetone-butanol-ethanol (ABE) production by Clostridium acetobutylicum. Amylolytic activity of C. acetobutylicum eliminates the need for the hydrolysis of starchy grain prior to fermentation. However, untreated grain contains phenolic compounds, i.e. tannins, which exhibit inhibitory effects against amylolytic activity and ABE fermentation. Less than 3 g/L ABE was obtained from untreated sweet sorghum grain at different substrate concentrations. Concentration of 0.2 mM gallic acid equivalent (GAE) of sorghum tannins was detected as the critical concentration which inhibits severely ABE fermentation. Applying a multi-stage hot water treatment resulted in tannins removal and significant enhancement in total ABE production up to 18 g/L. For efficient butanol production from 40, 60, and 80 g/L sorghum grain, hot water treatment with two, five, and six stages were found to be essential for efficient butanol production, respectively. Moreover, the amylolytic activity of C. acetobutylicum was inhibited by sorghum grain tannins, more than twice as high as the effects on the ABE fermentation pathway. Furthermore, unlike most substrates, sweet sorghum grain could provide all nutrients required for ABE fermentation, eliminating the need for supplementing expensive additional nutrients.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Industrial Crops and Products - Volume 108, 1 December 2017, Pages 225-231
نویسندگان
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