Air quality measurements in four sheep barns part II: pollutant gas emissions

Pollutant gas emissions from animal barns affect indoor air quality, the health and well-being of farmers, and the surrounding environment. This study was carried out in four sheep barns (SB) in Bursa, an important region for animal husbandry operations. Concentrations of NH₃, CO₂, H₂S, and CH₄ were measured in four sheep barns by monitoring throughout 24 h in 1 year. Pollutant gas emissions from barns were also calculated and modeled. The average pollutant gas emissions obtained in this study were 5 kg day^-1 barn^-1 for NH₃, and 18 kg day^-1 barn^-1 for CH₄. The average NH₃ and CH₄ emissions from each barn were 2.1 and 2.7 kg day^-1 barn^-1 for SB1; 9.4 and 12.9 kg day^-1 barn^-1 for SB2; 4.0 and 3.6 kg day^-1 barn^-1 for SB3; and 4.5 21 kg day^-1 barn^-1 for SB4, respectively. There are statistically significant differences between daytime and nighttime for pollutant gas emissions. Pollutant gas emissions in the monitored barns are generally higher in summer than in other seasons. Models for estimating NH₃, and CH₄ emissions were developed using measured temperature and relative humidity values in the barns. These models can only be used in the Bursa region. The results of this study were compared with other studies under similar conditions in the literature.