One of the harmful substances produced by livestock manure is ammonia (NH3), which is emitted at a high rate. Additionally, NH3 reacts with sulfur oxides (SOx) and nitrogen oxides (NOx) in the atmosphere to produce fine particulate matter (PM2.5). However, the management and countermeasures for NH3 in livestock facilities were found to be inadequate. To establish effective measures, an NH3 emission factor that complies with certified methodologies is required. This study calculates the emission factor by monitoring NH3 concentration and ventilation between September 2022 and May 2023 in a mechanically-ventilated enclosed facility. The data measurement was performed in accordance with the VERA test protocol from Europe, and NH3 concentrations were monitored in real-time using photoacoustic spectroscopy measurement equipment. The average NH3 concentrations for Rooms 1, 2, and 3 during the entire period were measured at 0.96 ± 0.39 ppm, 1.20 ± 0.57 ppm, and 1.34 ± 0.71 ppm, respectively, with an overall average of approximately 1.17 ± 0.49 ppm. The average ventilation was recorded at 2,782.0 ± 1,510.4 m³/h, with an average internal temperature of 26.0 ± 1.5 °C and a relative humidity of 63.9 ± 5.2%. The average emission factor per room was calculated as 0.14 ± 0.03 g/day/pig for Room 1, 0.19 ± 0.07 g/day/pig for Room 2, and 0.15 ± 0.05 g/day/pig for Room 3. Ultimately, this study determined the average NH3 emission factor for the weaned pig facility to be 0.16 g/day/ pig.

1. 서 론
2. 재료 및 방법
    2.1 돈사 구조
    2.2 돈사 모니터링 환경
    2.3 돈사 모니터링 인자 및 NH3 배출계수 산정
3. 결과 및 고찰
    3.1 돈사 모니터링 결과
    3.2 일변화 경향성
    3.3 NH3 배출계수 산정
    3.4 모니터링 인자 간 상관분석
4. 결 론
감사의 글
References

• 이연아(국립축산과학원 축산환경과) | YeonA Lee (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS))
• 박준수(국립축산과학원 축산환경과) | Junsu Park (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS))
• 우샘이(국립축산과학원 축산환경과) | Saem-Ee Woo (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS))
• 서시영(국립축산과학원 축산환경과) | Siyoung Seo (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS))
• 황옥화(국립축산과학원 축산환경과) | Okhwa Hwang (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS))
• 이준엽(국립축산과학원 축산환경과) | Junyeob Lee (Animal Environment Division, Department of Animal Biotechnology and Environment, National Institute of Animal Science (NIAS)) Corresponding author