Biogas Resource from Foodwaste Leachate Using UASB(Upflow Anaerobic Sludge Blanket)

UASB를 이용한 음폐수의 Biogas 자원화

  • Min, Boo-Ki (Department of Environmental Engineering, Chungbuk National University) ;
  • Lee, Chang-Hyun (Department of Environmental Engineering, Chungbuk National University) ;
  • Kim, Jae-Yong (Department of Environmental Engineering, Chungbuk National University)
  • 민부기 (충북대학교 환경공학과) ;
  • 이창현 (충북대학교 환경공학과) ;
  • 김재용 (충북대학교 환경공학과)
  • Published : 2012.02.10

Abstract

In this study, we operated a UASB (upflow anaerobic sludge blanket) reactor by using foodwaste leachate as a raw material with the method of Mesophilic Digestion ($35{\pm}0.5^{\circ}C$) and Thermophilic Digestion ($55{\pm}0.5^{\circ}C$). During 20 days of operating time with the Mesophilic Digestion, the recirculation ratio of effluent was stepwisely changed in every five days. Thermophilic Digestion was carried out at the same condition for Mesophilic Digestion. Results showed that the organic removal efficiency of Mesophilic Digestion was over 90% and the yield of methane production was from 66 up to 70%. The organic removal efficiency of Thermophilic Digestion was over 80% and the yield of methane production was between 62 to 68%. Also, when UASB reactor was operating to over the 3Q effluent recirculation, the experiment could be carried out economically and stably.

Keywords

food waste leachate;UASB process;anaerobic digestion;granular sludge;biogas

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