Comparison of Ammonia Emission Characteristics from Sows in Summer and Winter

In Korea, about 74% of ammonia emission is from livestock manure in the agricultural sector. Ammonia emission control is being more important because it not only harms the health of humans, animals, and plants but also acts as a precursor to generating secondary organic aerosol. Therefore, this study was conducted for 92 days in summer and 74 days in winter, in order to estimate the amount of ammonia emission in the sow house. By collecting data on ammonia concentration, ventilation rate, temperature, and humidity in real-time, the diurnal pattern was identified, and the ammonia emission factor in the gestating sow house was calculated. As a result, the ammonia concentration in the gestating sow house in summer and winter were 3.95-9.80 ppm and 10.50-31.52 ppm, respectively. And ventilation rate was measured in the range of 60.54-104.39 m3/h/pig in summer and 26.61-64.39 m3/h/pig in winter. In this study, the average ammonia emission factors per gestating sow in summer and winter were 7.38 and 16.90 g/day/pig, respectively. Since the emission factor differs depending on the season, it seems necessary to consider the season when evaluating ammonia emission. The results of this study are considered to be useful data for improving the domestic ammonia inventory.