Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Biological Hydrogen Production from Mixed Waste of Food and Activated Sludge

음식물쓰레기와 폐활성슬러지의 혼합물로부터 혐기성 바이오 수소 생산

  • 정종민 (한국과학기술연구원 환경기술연구단) ;
  • 홍석원 (한국과학기술연구원 환경기술연구단) ;
  • 박철희 ((주)SK 기술원) ;
  • 김영오 (현대건설기술연구소 환경기술연구부) ;
  • 이상협 (한국과학기술연구원 환경기술연구단)
  • Received : 2008.08.18
  • Accepted : 2008.10.13
  • Published : 2008.10.15
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Abstract

The influence of bacterial stress on anaerobic hydrogen-producing microorganisms was investigated in batch tests using serum bottles. Several physical and chemical stresses (i.e., heating, adding methane producing inhibitor and chemical acidification) were adapted as a pretreament of the seed sludge. In this experiment, the cultivation temperature were set at mesophilic ($35^{\circ}C$) and thermophilic conditions ($55^{\circ}C$) with adjusting pH at 5, 6, and 7 when using the mixture of food waste and activated sludge as a substrate. In conjunction with the pretreatment, hydrogen production was significantly enhanced as compared with that from untreated sludge. However, less biogas (hydrogen and methane) was produced without the pH control, resulted from the decrease of pH to below 4, mainly due to the formation of VFAs. Hydrogen and carbon dioxide gas were analyzed as main components of the biogas while methane not detected. With an application of chemical acidification, the highest hydrogen production value of 248 ml/l/day achieved at pH 7 and $35^{\circ}C$. In addition, more hydrogen gas produced when the ratio of butyric/acetic acid ratio increased. The optimum pH and temperature for hydrogen production were found to be 7 and $35^{\circ}C$, respectively.

Keywords

Acknowledgement

Supported by : (주) SK 에너지

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