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Effect of Pyroligneous Acid Liquor on the Maturity of Pig Manure Compost  

Lee, Jong-Eun (Dept. of Agricultural Chemistry, Chungnam National University)
Hong, Joo-Hwa (Dept. of Agricultural Chemistry, Chungnam National University)
Chang, Ki-Woon (Dept. of Agricultural Chemistry, Chungnam National University)
Hwang, Joon-Young (Korea Science and Engineering Foundation)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.38, no.2, 2005 , pp. 101-107 More about this Journal
Abstract
To investigate the effect of pyroligneous acid liquor (PAL) on the maturity of pig manure compost, PAL was treated to the compost piles. The treatments included applications of 100 and 300 times diluted PAL in addition to the control. The compost piles were stirred in three times at the 1st, 10th, and 25th day of composting. Temperature in the compost pile of control treatment increased from 28 to $60^{\circ}C$ within 10 days and remained nearly at the level until 30th day, then it began to decrease. On the other hand, temperature of the PAL-100 and PAL-300 treatments reached 65 to $70^{\circ}C$ within 8 days and became stabilized until 30th day, then the temperature decreased to about $28^{\circ}C$. However, the temperature of control was stabilized approximately at the 40th day. Initially, the pH of control treatment dropped from 8.2 to slightly above pH 8.0 during 4th day, but that of the PAL-100 treatment declined to 7.8. Among treatments, pH value of PAL-100 treatment was the lowest, which was about 7.3 after becoming stabilization. Also the germination index (GI) was increased at all treatments. The C/N ratio range of PAL-100 treatment was better balanced than others and was at 24.3. Moreover the round paper chromatogram of extracted solution of compost of PAL-100 treatment was the sharpest and clearest among treatments. The GI values of control, PAL-100, and PAL-300 in 60 days of composting were about 108, 120, and 118 in germination test using chinese cabbage, respectively. It can be concluded that the addition of diluted PAL solution is effective in composting of pig manure.
Keywords
Pyroligneous acid liquor; Pig manure; Composting; Humification;
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