Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Effects of Elutriating Rates for Elutriated Acid Fermentation of Food Waste

음식물쓰레기 세정산발효공정에서 세정율의 영향

  • Kwon, Koo-Ho (Department of Environmental Engineering, Kyungpook National University) ;
  • Lee, Sang-Hyub (Department of Environmental Engineering, Kyungpook National University) ;
  • Min, Kyung-Sok (Department of Environmental Engineering, Kyungpook National University)
  • Received : 2008.01.07
  • Accepted : 2008.02.27
  • Published : 2008.03.30
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Abstract

The korean government started to ban the sanitary landfill of food wastes as of 2005. The radical change of policy is primarily due to the limited landfill site, but aimed to promote not only to reduce the food waste production but also to enhance the reuse and recycle. The performance of elutriated acid fermentation to evaluate the effects of elutriating ratios was investigated. The fermenters were operated with elutriating water to food waste volumetric ratio of 2, 1, 0.5 and 0.25. Initial pH of elutriating water was set for 9 based on the pH effects study. The cumulative amounts of SCOD production rate were $0.34gSCOD/gVS_i$, $0.45gSCOD/gVS_i$, $0.26gSCOD/gVS_i$ and $0.28gSCOD/gVS_i$ with the ratios of 2, 1, 0.5 and 0.25, respectively. The cumulative productions of VFAs were 0.12 gVFAs as $COD/gVS_i$, 0.28 gVFAs as $COD/gVS_i$, 0.21 gVFAs as $COD/gVS_i$ and 0.14 gVFAs as $COD/gVS_i$ with the ratios of 2, 1, 0.5 and 0.25, respectively. The volume reduction were 58%, 52%, 45% and 47% with the ratios of 2, 1, 0.5 and 0.25, respectively.

Keywords

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