• 한국환경보건학회지
• /
• 제45권6호
• /
• pp.630-637
• /
• 2019

Objectives: This study was performed to evaluate the secular changes in indoor airborne dust or endotoxin levels in the dust from swine confinement buildings. Indoor levels were compared with the level at the exhaust outlet in order to examine the contribution potential of indoor dust to nearby ambient air dust. Methods: Comparisons were made on inhalable and respirable dust levels reported in 2002, 2012, and 2017 from 14, 10, and 36 swine fattening confinement buildings in Korea, respectively. This data was produced by the same research group. Levels of endotoxin adsorbed into inhalable or respirable dust were also compared. Samples of inhalable or respirable dust were collected indoors and at exhaust outlets from 17 swine fattening confinement buildings in 2019, and dust levels were compared between the indoor and the outlet. Results: The outlet inhalable dust level (0.111 mg/㎥) was approximately 19% of that from indoors, and the respirable dust level (0.033 mg/㎥) was approximately 74% of that from indoors. The outlet respirable dust levels were lower than the airborne fine dust levels in the towns where those farms are located. No significant difference was observed in the inhalable dust levels among the years examined, but the respirable dust level in 2017 (0.143 mg/㎥) was significantly lower than in 2002 (0.328 mg/㎥). The level of endotoxin in inhalable dust was significantly higher in 2017 (722 EU/㎥) than in both 2002 (75 EU/㎥) and 2012 (171 EU/㎥). Conclusion: Even though no apparent contribution from swine farm indoor dust to nearby ambient air dust was observed in terms of amount, a certain control strategy to reduce the production of airborne dust and endotoxin from swine farms is merited.

• 한국농공학회논문집
• /
• 제63권1호
• /
• pp.75-87
• /
• 2021

Air quality related to particulate matters and ammonia is being come to the fore as the national concern in Korea. CAPSS (Clean Air Policy Support System) provides emission coefficients of these kinds of particulate and gaseous matters in the fields of livestock; however reliability issues are consistently mentioned. Evaluation of emission rates of PM2.5 and NH3 of the country is very important, but only few studies are available as the background related to observation of the concentration of the particulate matter and ammonia, especially within livestock house in Korea. In this paper, long-term measurement of PM10, PM2.5, and ammonia within the mechanically ventilated broiler house were carried out to introduce backgrounds of generation and emission of the particulate matters and ammonia. Measurement results were analyzed according to seasonal changes, age of broilers(weeks) and measurement locations. Concentration of inhalable and respirable dust were also evaluated in terms of occupational respiratory health according to increase in broiler's activity. From the results of this study, identification of the generation mechanisms of the particulate and gaseous matters, and evaluation of the emission rate of these in the broiler house will be carried out.

• 한국농공학회논문집
• /
• 제64권1호
• /
• pp.99-110
• /
• 2022

In this study, the generation and emission characteristics of particulate matter and gaseous matter in a mechanically ventilated layer house were evaluated. Each concentration of PM₁₀, PM_2.5, inhalable dust, respirable dust, and NH₃ was measured and compared with occupational limit considering seasons and respiratory disorder. CAPPS (Clean Air Policy Support System) of the Ministry of Environment proposes the emission factors of PM₁₀, PM_2.5, and NH₃ for a layer houses however, emission factors are still calculated from foreign factors such as CONINAIR values. As a result, it is urgent to develop national emission factors for domestic layer house. Emission coefficients of the studied mechanically-ventilated layer house in a summer season were calculated as 0.052 kg/head/year for PM₁₀, about 12% lower than that of CAPSS, and 0.0068±0.0038 kg/head/year for PM_2.5, showing no significant difference. Emission factor of NH₃ was calculated as 0.159±0.031 kg/head/year, about 51% lower than that of CAPSS.