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Estimation of Evaporation Rate of Swine Slurry Using the Natural Evaporation System(NES) in summer

여름철 자연증발시스템(NES)의 腞슬러리 증발효율 평가

  • Kim, K.Y. (School of Agricultural Biotechnology, Seoul National University) ;
  • Choi, H.L. (School of Agricultural Biotechnology, Seoul National University) ;
  • Kim, J.G. (School of Agricultural Biotechnology, Seoul National University)
  • 김기연 (서울대학교 농생명공학부) ;
  • 최홍림 (서울대학교 농생명공학부) ;
  • 김진길 (서울대학교 농생명공학부)
  • Published : 2002.08.31

Abstract

The purpose of this study was to establish the optimal operation condition of the natural evaporation system(NES) which was used for reducing swine slurry. Especially the main point of this study is to estimate the effect of climate condition(clear & rainy) and spray type(batch & flow) for the evaporation rate of swine slurry applying the NES in summer. Experiment was performed from June to August, which was generally regarded as summer in Korea, with the spray type of batch in 2000 and that of flow in 2001. As a result of experiment for batch and flow type, the averaged evaporation rate was measured into 2.71 and 3.59 l/ton . $m^2$ . day on clear days and 0.62 and 0.66 l/ton . $m^2$ . day on raint days, respectively. Based on the calculated evaporation rate by the climate condition and the spray type, it was proved that the averaged reduction rate for total input(1t/day) were 15.99% and 3.19% on clear and rainy days and the evaporation rate of the flow type was superior to that of the batch type by 5%, approximately. Therefore, it was concluded that the supplementary equipment, such as fan, should by operated in rainy days and the spray type of flow rather than that of batch should be recommended to increase the evaporation rate in the natural evaporation system(NES).

Keywords

NES;Seine slurry;Climate condition;Spray type;Evaporation rate

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