책임운영기관 농촌진흥청 국립축산과학원 (로고)

Ammonia (NH3) is a basic gas in the atmosphere and is known to play an important role in producing adverse health and environmental effects. Atmospheric NH3 causes stunted livestock growth, decreased visibility, and induces lung diseases when high concentrations occur. In addition, atmospheric NH3 reacts with acidic species (sulfuric acid, nitric acid, etc.) and produces secondary inorganic aerosol. In this study, the NH3 concentration and ventilation of Rooms 1 to 3 inside a sow facility were measured during the period from March 25 to May 31, 2021. It was difficult to conduct long-term field experiments at housing where pigs are raised. However, in order to improve the accuracy and reliability of the data, repeated experiments were conducted in three pig rooms in the same environment. The average concentration of NH3 in Rooms 1 to 3 was measured to be 7.6 +- 2.7 ppm, 8.2 +- 2.8 ppm, and 8.2 +- 2.7 ppm, respectively. The average internal temperatures were 21.0 °C, 21.2 °C, and 21.8 °C, and the internal humidity was 49.3%, 49.2%, and 49.2%, respectively. The ventilation per pig in Rooms 1 to 3 was measured as 60.4 m3 /hour∙pig, 62.5 m3 /hour∙pig, and 64.9 m3 /hour∙pig, respectively. At this time, NH3 emissions from Rooms 1 to 3 were found to be 6.9 +- 0.8 g/day∙pig, 7.9 +- 1.5 g/day∙pig, and 8.2 +- 1.3 g/day∙pig, respectively. As a result of the correlation analysis, the NH3 concentration was analyzed as producing a negative correlation between the ventilation (r=-0.73) and the internal temperature (r=-0.60) increase. Finally, as a result of calculating the national NH3 emission factor, the NH3 emission of one sow room in spring was 7.7 +- 1.4 g/day∙pig, and the NH3 emission of one year was 2.8 kg/ year∙pig.