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Investigation on the Characteristics Variation According to Air Supply Capacity in Layer Manure by Composting  

Kwag, J.H. (National Institute of Animal Science, RDA.)
Cho, S.H. (National Institute of Animal Science, RDA.)
Jeong, K.H. (National Institute of Animal Science, RDA.)
Kim, J.H. (National Institute of Animal Science, RDA.)
Choi, D.Y. (National Institute of Animal Science, RDA.)
Jeong, Y.S. (National Institute of Animal Science, RDA.)
Jeong, M.S. (National Institute of Animal Science, RDA.)
Kang, H.S. (National Institute of Animal Science, RDA.)
Ra, C.S. (Kangwon Nat. Univ.)
Publication Information
Journal of Animal Environmental Science / v.16, no.2, 2010 , pp. 135-142 More about this Journal
Abstract
The composting of layer manure is economical and efficiently process. In this study, the variation of composting characteristics in layer manure was investigated according to air supply capacity. The fermented compost was added in layer manure and mixed with sawdust inside composting reactors. The level of air supply capacity was varied in the range of $50{\sim}200\;{\ell}/m^3/min$. During composting the temperature variations of composting piles was different the temperatures of composting piles for T-1 ($50\;{\ell}/m^3/min$) and T-2 ($100\;{\ell}/m^3/min$) were reached at $40^{\circ}C$ and $50^{\circ}C$ within 2 days, respectively. For T-3 ($150\;{\ell}/m^3/min$) and T-4 ($200\;{\ell}/m^3/min$), their temperatures was $60^{\circ}C$ within same days and maintained during 8 days. Water contents decreased according to the air supply capacity; 8.9%, 15.4%, 18.0% and 18.6% for T-1, T-2, T-3 and T-4. The weight ratios of T-1, T-2, T-3 and T-4 were reduced to 12.8%, 15.6%, 18.1% and 17.9%, respectively. The decreasing volumetric ratios of T-1, T-2, T-3 and T-4 were 18.0%, 21.0%, 22.3% and 22.0%. The oxygen discharge concentrations during composting were 12 ppm for T-1, T-2 and 9 ppm for T-3 and T-4. After composting, fertilizer components such as total nitrogen (TN) and phosphorous pentoxide ($P_2O_5$) were examined at each air supply capacity. Nitrogen contents of the T-1, T-2, T-3 and T-4 were 0.75%, 0.74%, 0.72% and 0.64%. Also, The contents of $P_2O_5$ were 0.35%, 0.40%, 0.38% and 0.42% for T-1, T-2, T-3 and T-4.
Keywords
Manure; Composting; Moisture content;
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Times Cited By KSCI : 1  (Citation Analysis)
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