کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6484057 155 2014 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-step acid and alkaline ethanolysis/alkaline peroxide fractionation of sugarcane bagasse and rice straw for production of polylactic acid precursor
ترجمه فارسی عنوان
پراکسید اسید قلیایی و قلیایی اتانولیز / پراکسید قلیایی از باگاس نیشکر و کاه برنج برای تولید پیش ماده اسید پلی اتیلن
کلمات کلیدی
تجزیه لجنس سلولز ارگانواسولف، سونوگرافی، ارزش گذاری لیگنوسلولوز، تولید اسید لاکتیک، پیش ماده اسید پلی اتیلن،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی
Sugarcane bagasse and rice straw were subjected to acid and alkaline ethanolysis and sequential enzymatic hydrolysis to produce glucose for lactic acid production. Influence of physico-chemical treatments using ultrasonic bath and ultrasonic probe was studied compared with mechanical stirring. The results showed that the highest glucose yield with least contamination of xylose was obtained from acid ethanolysis fractionation (5 N H2SO4 + 50%, v/v ethanol) when stirred at 90 °C for 4 h. Alkaline ethanolysis accomplished high amount of both glucose and xylose released, however it was not favorable substrate for homofermentative lactic acid bacteria. In order to enhance enzymatic hydrolysis of acid ethanolysis fractionated samples, lignin was subsequently removed by the second step alkaline/peroxide delignification. The maximum lactic acid was obtained at 23.6 ± 0.2 g/L from Lactobacillus casei fermentation after 72 h when hydrolysate from two-step acid hydrolysis and alkaline/peroxide fractionated sugarcane bagasse containing 24.6 g/L initial glucose concentration was used as substrate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Engineering Journal - Volume 85, 15 April 2014, Pages 49-62
نویسندگان
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