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http://dx.doi.org/10.7316/khnes.2011.22.3.333

Biohydrogen Production from Food Waste by Two-Stage (Lactate+Photo)-Fermentation Process  

Kim, Ok-Sun (Wastes Energy Research Center, Korea Institute of Energy Research)
Son, Han-Na (Wastes Energy Research Center, Korea Institute of Energy Research)
Kim, Dong-Hoon (Wastes Energy Research Center, Korea Institute of Energy Research)
Jeon, Dong-Jin (Wastes Energy Research Center, Korea Institute of Energy Research)
Rhee, Young-Woo (Graduate School of Green Energy Technology, Chungnam National University)
Kim, Mi-Sun (Wastes Energy Research Center, Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.22, no.3, 2011 , pp. 333-339 More about this Journal
Abstract
In the present work, it was attempted to produce $H_2$ from food waste by the two-stage fermentation system. Food waste was acidified to lactate by using indigenous lactic acid bacteria under mesophilic condition, and the lactate fermentation effluent (LFE) was subsequently converted to $H_2$ by photo-fermentation. $Rhodobacter$ $sphaeroides$ KD131 was used as the photo-fermenting bacteria. The optimal conditions for lactate fermentation were found to be pH of 5.5 and substrate concentration of 30 g Carbo. COD/L, under which yielded 1.6 mol lactate/mol glucose. By filtering the LFE and adding trace metal, $H_2$ production increased by more than three times compared to using raw LFE, and finally reached the $H_2$ yield of 3.6 mol $H_2$/mol lactate. Via the developed two-stage fermentation system $H_2$ yield of 5.8 mol $H_2$/mol glucose was achieved from food waste, whose value was the highest that ever recorded.
Keywords
Photo-fermentation; Lactate-fermentation; Food waste; Hydrogen; pH;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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