Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Anaerobic co-digestion of food waste leachate with microalgae for improvement of methane production

메탄생산 향상을 위한 음폐수와 미세조류의 혐기성 통합소화

  • 이관용 (건국대학교 사회환경시스템공학과) ;
  • 프롬폴 (건국대학교 사회환경시스템공학과) ;
  • 김대기 (건국대학교 사회환경시스템공학과) ;
  • 박종진 (코오롱환경서비스기술연구소) ;
  • 최장승 (다이텍연구원) ;
  • 박기영 (건국대학교 사회환경시스템공학과)
  • Received : 2014.01.03
  • Accepted : 2014.02.10
  • Published : 2014.02.15
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Abstract

Food waste leachate (FWL) is a serious pollutant waste coming from the food waste recycling facilities in Korea. FWL has a high organic matter content and high COD to nitrogen (COD/N) ratio, which can disturb efficient methane production in the anaerobic digestion of FWL. In the present study a microalga, Clorella vulgaris (C.V), was used as co-substrate for the FWL anaerobic digestion in order to supply nutrients, decrease the COD/N ratio and increase its methane yield. Different co-digestion mixtures (COD/N ratios) were studied by using biochemical methane potential test and modified Gompertz equation for kinetic study. Mixed substrate of FWL and C. vulgaris in the co-digestion clearly showed more the biomethane yield than the sole substrates. The maximum methane production, 827.7 mL-$CH_4$/g-VS added, was obtained for COD/N ratio of 24/1, whereas the highest improvement of methane yield was found for COD/N ratio of 15/1.

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References

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