Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7717992 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
This study investigated the effects of sugar composition and hydraulic retention time (HRT) on continuous hydrogen fermentation. Continuously-stirred tank reactors (CSTRs) were inoculated with heat-treated digester sludge and fed with 15Â g/L of glucose, galactose and galactose: glucose mixture (8:2 ratio-simulating the hydrolysate composition of macroalgae) at HRTs of 6-24Â h. Peak hydrogen production rate (HPR) and hydrogen yield (HY) of 4.49Â L/L/d and 1.62Â mol/mol glucoseadded were attained while using glucose as feedstock at HRTs of 6 and 18Â h, respectively. Meanwhile, galactose provided a peak HPR and HY of 2.35Â L/L/d and 1.00Â mol/mol galactoseadded during the HRTs of 12 and 24Â h, respectively. In case of mixed sugars (galactose 8: glucose 2) the production performances were inferior to the sole sugar conditions due to the low substrate utilization of less than 65%, which showed a maximal HPR and HY of 2.75Â L/L/d and 0.48Â mol/mol carbohydrateadded at the HRTs of 6 and 18Â h, respectively.
Related Topics
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Authors
Gopalakrishnan Kumar, Jong-Hun Park, Mi-Sun Kim, Dong-Hoon Kim, Sang-Hyoun Kim,