Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Biohydrogen Production from Food Waste by Two-Stage (Lactate+Photo)-Fermentation Process

2단(유산발효+광발효) 발효공정을 통한 음식물쓰레기로부터의 수소생산

  • 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)
  • 김옥선 (한국에너지기술연구원 폐자원에너지센터) ;
  • 손한나 (한국에너지기술연구원 폐자원에너지센터) ;
  • 김동훈 (한국에너지기술연구원 폐자원에너지센터) ;
  • 전동진 (한국에너지기술연구원 폐자원에너지센터) ;
  • 이영우 (녹색에너지기술전문대학원) ;
  • 김미선 (한국에너지기술연구원 폐자원에너지센터)
  • Received : 2011.04.24
  • Accepted : 2011.06.20
  • Published : 2011.06.30
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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

References

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