کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5146913 1497379 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of hydraulic retention time (HRT) on biohydrogen production from galactose in an up-flow anaerobic sludge blanket reactor
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Effect of hydraulic retention time (HRT) on biohydrogen production from galactose in an up-flow anaerobic sludge blanket reactor
چکیده انگلیسی
This study investigated the hydrogen fermentation from galactose in up-flow anaerobic sludge blanket (UASB) reactor under mesophilic temperature of 37 °C. The maximum hydrogen production rate (HPR) and hydrogen yield (HY) of 56.8 L/L/d and 2.25 mol/mol galactose added were achieved at a hydraulic retention time (HRT) of 2 h. Further shortening the HRT to 1.5 h, led to the significant drop in the HPR and HY with a value of 48.3 L/L/d and 1.44 mol/mol galactose added, respectively. During the reactor operation, neither external pH adjustment nor recirculation was required, while the pH was maintained in the range of 5.5-6.2 by the carbonate buffer in the nutrient medium. Acetate and butyrate were the major soluble metabolic products (SMPs) formed during the hydrogen fermentation with fewer amounts of lactate and propionate during the peak hydrogen production performances. The results showed that controlling appropriate HRT is prerequisite for the enhancement of hydrogen production performances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 46, 14 December 2016, Pages 21670-21677
نویسندگان
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