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

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Effect of Heat Treatment on the Start-up Performance for Anaerobic Hydrogen Fermentation of Food Waste

음식폐기물을 이용한 혐기성 수소 발효 시 초기 운전 성능에 대한 열처리 효과

  • Lee, Chae-Young (Civil of Engineering, The University of Suwon) ;
  • Lee, Se-Wook (Civil of Engineering, The University of Suwon) ;
  • Hwang, Sun-Jin (Environmental Science & Environmental Engineering, Kyung Hee University)
  • 이채영 (수원대학교 토목공학과) ;
  • 이세욱 (수원대학교 토목공학과) ;
  • 황선진 (경희대학교 환경학 및 환경공학과)
  • Received : 2011.11.25
  • Accepted : 2011.12.27
  • Published : 2011.12.31
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Abstract

This study was conducted to investigate the effect of heat treatment on the start-up performance for anaerobic hydrogen fermentation of food waste. The result showed that hydrogen production was $0.61{\pm}0.31$ mol $H_2$/mol hexose with heat-treatment of food waste at $70^{\circ}C$ for 60 min whereas it was $0.36{\pm}0.31$ mol $H_2$/mol hexose without heat-treatment of one. The heat treatment of food waste enhanced hydrogen yield due probably to the increase of hydrolysis as well as the decrease of non-hydrogen fermentation microorganisms. The removal efficiency of carbohydrate in reactors regardless of heat treatment of food waste maintained over 90%. The hydrogen conversion efficiency from food waste was 1.7-6.3% with heat-treatment whereas it was 0.7-4.5% without heat-treatment. At the time of switchover from batch to continuous operation, lactate concentration was high compared to the n-butyrate concentration in anaerobic hydrogen fermentation reactor without heat-treatment. Anaerobic hydrogen fermentation of food waste with heat treatment was stable in start-up periods because lactate concentration could be maintained at a relatively low compared to n-butyrate concentration due to the decrease of non-hydrogen fermentation microorganisms.

Keywords

References

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