کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
682003 888973 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of nutrient limitation and two-stage continuous fermentor design on productivities during “Clostridium ragsdalei” syngas fermentation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Effect of nutrient limitation and two-stage continuous fermentor design on productivities during “Clostridium ragsdalei” syngas fermentation
چکیده انگلیسی

The effect of three limiting nutrients, calcium pantothenate, vitamin B12 and cobalt chloride (CoCl2), on syngas fermentation using “Clostridium ragsdalei” was determined using serum bottle fermentation studies. Significant results from the bottle studies were translated into single- and two-stage continuous fermentor designs. Studies indicated that three-way interactions between the three limiting nutrients, and two-way interactions between vitamin B12 and CoCl2 had a significant positive effect on ethanol and acetic acid formation. In general, ethanol and acetic acid production ceased at the end of 9 days corresponding to the production of 2.01 and 1.95 g L−1 for the above interactions. Reactor studies indicated the three-way nutrient limitation in two-stage fermentor showed improved acetic acid (17.51 g g−1 cells) and ethanol (14.74 g g−1 cells) yield compared to treatments in single-stage fermentors. These results further support the hypothesis that it is possible to modulate the product formation by limiting key nutrients during C. ragsdalei syngas fermentation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 102, Issue 10, May 2011, Pages 6058–6064
نویسندگان
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