고상식돈사의 분뇨처리에 관한 연구

초록

This research was conducted to examine proper manure treatment methods for a high-rise swine barn with results of the fact-finding survey on manure treatment methods used in high-rise swine barns and sawdust swine barns in Korea. The average temperatures on bedding of control, T1, and T2 were between 25.3～25.4℃ with little difference. Air flow rate of T2 was slower than those of control and T1. Dust generation in control was 54 cpm which was higher than T1 and T2. The average ammonia concentration in control was highest showing 6.0 ppm, ranged from 0.5 to 14.5ppm, with statistical difference(p<0.05), compared to T1(2.8ppm) and T2(2.6ppm). Sawdust spreading used in control and T1 decreased ammonia concentration. T1 showed the lowest concentration of CO₂. Water contents of control and T2 were close to the proper water content, 65%. T1 had the highest water content and pH, and the lowest organic matter and C/N ratio. The volumes of sawdust spread per head were 0.26 and 0.27m³ in control and T2, respectively, which was less than T1. Operating cost such as an electricity bill for blowers was cheap in T2. Hence, T2 bedding sawdust up to 10cm thick and periodically spreading additional sawdust from second story was recommended.

키워드