Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Piggery Waste Treatment using Improved MLE Process in Full-Scale

수정된 MLE 공정을 이용한 Full-Scale에서의 돈사분뇨처리

  • Hwang, In-Su (Office of Livestock Wastewater Treatment Plant, Sanju city) ;
  • Min, Kyung-Sok (Department of Environmental Engineering, Kyungpook National University)
  • 황인수 (상주시축산폐수처리사업소) ;
  • 민경석 (경북대학교 환경공학과)
  • Received : 2006.05.04
  • Accepted : 2006.06.30
  • Published : 2006.09.30
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Abstract

The improved MLE (modified Ludzack-Ettinger) process was operated for piggery waste treatment in full-scale public livestock waste treatment plant. The treated waste from bioreactor was suitable for the strict effluent standard of 200 mgCOD/L and 60 mgTN/L as it was dewatered chemically without settling tank and passed through filtration process. Though this treatment method produced a great deal of sludge ($6.4m^3\;per\;m^3$ dewatered piggery waste) it was able to accomplish predominant effluent quality by removing non-biodegradable COD and color without advanced oxidation process as ozone, fenton and etc.. The nitrogen removal efficiency of bioreactor was rapidly declined from March to May (from 0.016 to 0.005 kgN/kgVSS-day) when disinfection is in earnest as well as from warm season when reactor temperature rises higher than $35^{\circ}C$(from 0.016 to 0.008 kgN/kgVSS-day). This study proves that counterplanes for infection residuals, bioreactor temperature and dewatering sludge reduction are necessary for piggery waste treatment.

Keywords

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