The characteristics of ammonia during the growing period of pigs in a facility with a mechanical ventilation system were analyzed, and the emission factor was calculated. Real-time ammonia concentration was measured using photoacoustic spectroscopy equipment, and a ventilation measuring device was fabricated to measure the amount of air vented from an exhaust fan according to the operation rate. All data were collected as one-hour averages. The mean ammonia concentration, indoor temperature, and ventilation rate was 1.44~2.08 ppm, 25.5~26.4oC, and 24~32 m3/h per pig, respectively. Both concentration and ventilation rate are important factors in terms of emission management, but correlation analysis shows that the impact of concentration is higher than that of ventilation. Using ammonia concentration and ventilation data, the ammonia emissions per pig were calculated by considering the number of pigs (0.25~1.74 g/day·pig). The final ammonia emission factor yielded a value of 0.81 g/day·pig.

Abstract
1. 서 론
2. 재료 및 방법
    2.1 실험돈사 구조 및 사육 환경
    2.2 환기량 측정 및 보정
    2.3 암모니아 농도 및 환경요인 모니터링
    2.4 배출계수 산정
    2.5 통계분석 및 이상치 제거
3. 결과 및 고찰
    3.1 실시간 모니터링 결과
    3.2 시간별 변화 추이
    3.3 시간별 데이터 상관관계 분석
    3.4 암모니아 배출계수
4. 결 론
References

• 조광곤(국립축산과학원 축산환경과) | Gwang-Gon Jo (Division of Animal Environment, National Institute of Animal Science)
• 하태환(국립축산과학원 축산환경과) | Tae-Hwan Ha (Division of Animal Environment, National Institute of Animal Science)
• 장유나(국립축산과학원 축산환경과) | Yu-Na Jang (Division of Animal Environment, National Institute of Animal Science)
• 서시영(국립축산과학원 축산환경과) | Si-Young Seo (Division of Animal Environment, National Institute of Animal Science)
• 정민웅(국립축산과학원 축산환경과) | Min-Woong Jung (Division of Animal Environment, National Institute of Animal Science) Corresponding author