DAILY VARIATIONS IN ODOR AND GAS EMISSIONS FROM ANIMAL FACILITIES

Abstract

Seven different animal facilities were studied to determine daily variations in emissions of odor, ammonia, andhydrogen sulfide. Air samples were collected every two hours over a 12-hour period during the day for odor and gasmeasurements from these facilities. A nursery building had the highest emission rates for odor and hydrogen sulfide (max:50 OU m 3 /s/m 2 and 140 g/s/m 2 , respectively). The naturally ventilated swine finishing building had the highestammonia emission rate (max: 170 g/s/m 2 ). The data also showed that there was no significant difference in averageammonia and hydrogen sulfide concentrations over the 12-h sampling period for all the animal facilities. Ventilation ratesplay a key role in determining the emission rates of aerial pollutants from animal buildings. However, when comparingthe overall odor and gas emissions among animal buildings with different sizes, it is necessary to consider building sizesin addition to ventilation rates.