강제환기식 비육돈사 내 암모니아 발생특성
Ammonia Emission Characteristics during the Finishing Periods of Pigs Housed with Mechanical Ventilation System
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초록
구조와 사육환경이 동일한 3개의 돈방(room A~C)에서 48일 동안 비육돈의 암모니아 농도 및 환기량을 모니터링하여 배출계수를 산정하였다. 실험 결과, 온도 22.5℃, 습도 53.9% 환경에서 평균 암모니아 순발생 농도 5.93 ppm, 환기량 23.7 m3/h·pig로 나타났다. 일별 상관관계 분석결과, 암모니아 농도는 온도와 음의 상관관계(R2: -0.65 ~ -0.53)를 가지는 것으로 나타났으며, 환기량은 암모니아 농도에 거의 영향을 미치지 않는것으로 나타났다. 암모니아 농도는 이른 오전을 기점으로 서서히 증가 경향을 보이다가 12~13시경 최댓값에 도달하였고, 상호 상관도가 높은온도, 습도, 환기량의 경우 14~15시에 최댓값을 갖는 것으로 분석되었다. 시간별 데이터 상관관계 분석결과, 암모니아 배출량에 영향을 미치는요소는 암모니아 농도(R2=0.71)와 환기량(R2=0.61)으로 이 중, 암모니아 농도가 더 상관성이 높은 것으로 분석되었다. 암모니아 배출계수는 2.28 g/d·pig로 분석되었다.
Abstract
Emission factors were determined by monitoring the ammonia concentration and ventilation rate of finishing pigs for 48 days in three pig rooms (i.e., rooms A, B, and C), all of which have the same structure and breeding environment. The experimental results show that the average ammonia concentration was 5.93 ppm, the ventilation rate was 23.7 m3/h·pig in the environment of the temperature was 22.5℃, and the humidity was 53.9%. The data correlation analysis on a daily basis showed that the ammonia concentration had a negative correlation with temperature (R2=-0.65 to -0.53) and the ventilation rate had a minimal effect on the ammonia concentration. The ammonia concentration gradually increased during the early hours in the morning and then reached a maximum value at midday (around 12:00–13:00). It was observed that the temperature, humidity, and ventilation rate with high cross-correlation data were maximum at 14:00–15:00. Based on the correlation analysis of the hourly data, factors that influenced the ammonia emission were the ammonia concentration (R2=0.71) and ventilation rate (R2=0.61), of which the ammonia concentration was more correlated. The ammonia emission factor was analyzed at 2.28 g/d·pig.
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