Field Investigation of Environment Parameter in Aerobic Composting for Pig Slurry at a Scraper System
2008
Ryoo, J.W. (Sangji University, Wonju, Republic of Korea), E-mail: [email protected]
This study was carried out to investigate the temperature, water balance, evaporation and physicochemical properties during the composting with pig slurry at a scraper system. The pig slurry was composted on farm trial using continuous aeration with turning machine for 5 month. A compost facility of rectangular concrete bin with dimension of 53 m (length) × 4.6 m (width) × 2 m (height) was bedded with sawdust. The environmental parameters were monitored in period of 5 months. The results were as follows; 1. During the composting period, the temperature was varied in the range 50~70℃. The temperature of compost pile was highest in middle layer and lowest in under layer. Temperature difference between middle and under area of compost pile was 5~20℃. 2. The water content of compost pile varied 50~68%. In the period of 50% of water content of compost pile, the temperature of compost was 20~30℃ and was not successfully composted. 3. In this study, total evaporation was 90% during composting. The amount of slurry per 1 ㎥ sawdust by this method was 3.16 ㎥ without treatment of effluent output. 4. The chemical properties of produced compost was high, but suitable for plant growth. Concentration of T-N, T-C in the final compost were 1.62, 34%, respectively.
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