کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
677389 1459845 2013 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acid hydrolysis and fermentation of microalgal starches to ethanol by the yeast Saccharomyces cerevisiae
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Acid hydrolysis and fermentation of microalgal starches to ethanol by the yeast Saccharomyces cerevisiae
چکیده انگلیسی

Many studies on the use of microalgal biomass to generate lipid and starch for production of transportation fuels assume ready conversion of starch to ethanol. However, few have shown data on this process. Here, biomass from the wall-deficient cells of Chlamydomonas reinhardtii mutant cw15 was sequentially treated with 70 °C ethanol and 60 °C hexane prior to sulfuric acid hydrolysis at 121 °C and 2 atm. Hydrolysis was monitored over time until no further starch breakdown was observed. An estimated 30% of the dry algal biomass was hydrolyzed for fermentation. This hydrolyzed starch was successfully fermented into ethanol by Saccharomyces cerevisiae to a maximum concentration of 0.87 ± 0.01% (m/v) at a maximum rate of 14 ± 1 mL/g h in 28 h. The observed yield coefficient of ethanol from glucose was 0.44 (g/g). Ethanol and what appeared to be glycerol were produced in equal proportions.


► Saccharomyces cerevisiae yeast can ferment hydrolyzed algal starch from Chlamydomonas reinhardtii.
► Thirty percent of the algal biomass was successfully hydrolyzed for fermentation.
► A fermentative yield coefficient of ethanol from glucose of 0.44 (g/g) was obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomass and Bioenergy - Volume 48, January 2013, Pages 59–65
نویسندگان
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