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Performance Evaluation and Characteristic Study of the Single Anaerobic Digestion from Piggery Slurry

돈분 슬러리를 이용한 단상 혐기소화공정의 특성연구 및 성능평가

  • Park, Woo-Kyun (National Academy of Agricultural Science, Rural Development Administration) ;
  • Jun, Hang-Bae (Department of Environmental Engineering, Chungbuk National University) ;
  • Park, Noh-Back (National Academy of Agricultural Science, Rural Development Administration) ;
  • Kwon, Soon-Ik (National Academy of Agricultural Science, Rural Development Administration) ;
  • Shin, Joung-Du (National Academy of Agricultural Science, Rural Development Administration) ;
  • Hong, Seung-Gil (National Academy of Agricultural Science, Rural Development Administration)
  • 박우균 (농촌진흥청 국립농업과학원) ;
  • 전항배 (충북대학교 환경공학과) ;
  • 박노백 (농촌진흥청 국립농업과학원) ;
  • 권순익 (농촌진흥청 국립농업과학원) ;
  • 신중두 (농촌진흥청 국립농업과학원) ;
  • 홍승길 (농촌진흥청 국립농업과학원)
  • Received : 2011.03.02
  • Accepted : 2011.03.21
  • Published : 2011.03.31

Abstract

BACKGROUND: Disposal of slurry animal manure produced by an anaerobic slurry-type barn method is not easy since the animal slurry contain high moisture content which makes solid-liquid separation a difficult process. However, recently, the interest about anaerobic digestion process as an environment-friendly waste disposal method has gained a wide interest because it can treat highly organic matter contained by the piggery slurry, decrease the odor after treatment, and enable the effective recovery of the methane gas which is a valuable energy resource. The objectives of this study were to identify the solubilization characteristics and to improve the anaerobic digestion efficiency of piggery slurry through full-scale anaerobic digestion experiments. METHODS AND RESULTS: In a full-scale continuous anaerobic digestion operation, the adaptability of single anaerobic digestion and its digestion efficiency were also evaluated in the farm field. The actual pH range and alkalinity concentration of piggery slurry used during the operation were comparatively higher than the concentrations of pH and alkalinity in the digestion tank which were stable at 7.5~8.0, 4,008 mg/L (as$CaCO_3$), respectively. The removal efficiency of organic matter (TCOD) by anaerobic digestion was 75~90% and methane gas production amount was at 0.33 L/L/day, a little higher than that of ordinary animal manure. CONCLUSION(s): Our findings showed higher recovery of highly purified methane and greater efficiency of anaerobic tank digestion since its methane gas content was at 65~70%.

Keywords

Full scale biogas plant;Methane production;Piggery slurry;Single Anaerobic digestion

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