Journal of Animal Environmental Science (한국축산시설환경학회지)

The Korean Society of Animal Environmental Science & Technology (한국축산환경학회)
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The Changes of Solid, Nitrogen and Phosphorus Concentrations in Pig Slurry Stored at Various Depth of Slurry Storage Tank

돼지분뇨슬러리의 액비조내 저장깊이별 고형물 및 질소, 인의 함량분포에 관한 연구

  • Jeong, Kwang-Hwa (Division of environment, National Livestock Research Institute R.D.A.) ;
  • Chung, Eui-Soo (Division of environment, National Livestock Research Institute R.D.A.) ;
  • Park, Chi-Ho (Division of environment, National Livestock Research Institute R.D.A.) ;
  • Kwag, Jung-Hoon (Division of environment, National Livestock Research Institute R.D.A.) ;
  • Choi, Dong-Yoon (Division of environment, National Livestock Research Institute R.D.A.) ;
  • Yoo, Yong-Hee (Division of environment, National Livestock Research Institute R.D.A.)
  • Published : 2006.12.30
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Abstract

This paper describes the changes of characteristics of pig slurry according to storing depth. Most of the substances containing pollutants, such as were Management of manure and wastewater from animal confinement facilities is a critical factor for pollution control. With proper treatment processing method in both solid and liquid forms, it can be used as a fertilizer and soil conditioner. In Korea, liquid-manure handling system is very popular because its treatment and application is easy and labor saving. In the storage tank treatment, the period of fermentation process and solids-liquid separation averages six months and the supernatant liquid is being used as a fertilizer. In this study, the changes in chemical characteristics of pig slurry at varying depths of the storage tank were investigated. Results showed that the pH value of the fermented pig slurry was > 7, while the major pollutants such as BOD, SS, N and P were highest in the bottom of the tank. Therefore, the above findings proved that varying depths in the storage tank can influence the concentration of pollutants of the fermented pig slurry.

본 연구는 돼지분뇨 슬러리의 액비화시 저장깊이(매 30m 깊이별)에 따른 액비의 수직 적층형 단면을 구분하여 각 단면별로 유기물 및 질소와 인의 농도변화 및 고형물의 분포 형태를 분석하여 액비의 수직 단면별 특성을 구명하고자 수행되었으며 주요 결과는 다음과 같다. 1. 침전깊이가 깊어짐에 따라 총고형물 농도는 증가하는 경향을 보인 반면에 총고형물중에 함유된 용해성 물질은 감소하였다. 2. 침전깊이별 오염물 농도는 깊이에 따라 증가하여 저장조 전체깊이 대비 약 70% 정도 내외에서 급격하게 증가하는 경향을 보였다. 3. 총질소와 총인 역시 침전깊이가 깊어짐에 따라 증가하는 결과를 보였는데, 이러한 경향은 총 인의 경우에 있어 더 뚜렷했고 질소의 농도변화는 상대적으로 적었다. 4. 저장 깊이가 깊어짐에 따라 Cr과 Ni 등의 함량도 증가하는 경향을 보였고 그 증가 경향치는 SS의 농도변화와 유사하였다.

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