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http://dx.doi.org/10.17137/korrae.2016.24.3.63

Characteristic Changes of Swine Manure by Air Suction Composting System  

Lee, Dong-jun (National Institute of Animal Science, RDA)
Kim, Jung Kon (National Institute of Animal Science, RDA)
Jeong, Kwang-Hwa (National Institute of Animal Science, RDA)
Cho, Won-Mo (National Institute of Animal Science, RDA)
Ravindran, B. (National Institute of Animal Science, RDA)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.24, no.3, 2016 , pp. 63-74 More about this Journal
Abstract
The objective of this study was to investigate the variations of physico-chemical properties during the swine manure composting, sawdust as the bulking agent was composted at different points (Top layer, Side of middle layer, Bottom layer). Air suction system with constant bottom aeration in bench scale reactors (30 L). The highest temperature was reached in the range of $58^{\circ}C$ to $62^{\circ}C$ on $3^{rd}$ day and this thermophilic phase (> $50^{\circ}C$) was continued for 3 days in all the treatment mixtures. However, the temperature was gradually decreased to room temperature at the end of 60 day composting process. Except control, the discharged ammonia ($NH_3$) was a maximum in the treatment order of Top layer>Bottom layer>Side of middle layer as 500 ppm, 162 ppm and 120 ppm, respectively, on the $4^{th}$ day and showing that Top layer point Air suction produce much more ammonia content than the other point. During the composting process, the total Kjeldahl nitrogen (TKN) was gradually increased due to the mass loss in the composting mixtures. At the same time, C/N ratio was decreased to Top layer, 13; Side of middle layer, 12 and Bottom layer, 13 at Air suction points. The significant reduction of C/N ratio in all different air suction system when manure was matured. The $NH_4-N$ to $NO_3-N$ ratio was recorded as 10.52 at the initial stage of the compost mixtures and reduced to 0.97 (Top layer), 0.70 (Side of middle layer), 3.2 (Bottom layer) because of manure decomposition. The overall results revealed that Top layer and Side of middle layer Air suction is a suitable option when compared other point for high quality composts.
Keywords
Swine manure; Composting; Air suction; Discharged ammonia;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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