کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686168 889063 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of d-lactic acid from defatted rice bran by simultaneous saccharification and fermentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Production of d-lactic acid from defatted rice bran by simultaneous saccharification and fermentation
چکیده انگلیسی

Production of d-lactic acid from rice bran, one of the most abundant agricultural by-products in Japan, is studied. Lactobacillus delbrueckii subsp. delbrueckii IFO 3202 and defatted rice bran powder after squeezing rice oil were used for the production. Since the rice bran contains polysaccharides as starch and cellulose, we coupled saccharification with amylase and cellulase to lactic acid fermentation. The indigenous bacteria in the rice bran produced racemic lactic acid in the saccharification at pH 6.0–6.8. Thus the pH was controlled at 5.0 to suppress the growth of the indigenous bacteria. L. delbrueckii IFO 3202 produced 28 kg m−3 lactic acid from 100 kg m−3 rice bran after 36 h at 37 °C. The yield based on the amount of sugars soluble after 36-h hydrolysis of the bran by amylase and cellulase (36 kg m−3 from 100 kg m−3 of the bran) was 78%. The optical purity of produced d-lactic acid was 95% e.e.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 97, Issue 2, January 2006, Pages 211–217
نویسندگان
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