CONCENTRATIONS AND DISTRIBUTIONS OF AIRBORNE BACTERIA INSIDE AND DOWNWIND OF A GROWING SWINE BUILDING IN CHINA
文献类型： 外文期刊
作者： Tao, X. 1 ; Shang, B. 1 ; Dong, H. 1 ; Chen, Y. 1 ; Xin, H. 2 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China
2.Iowa State Univ, Dept Agr & Biosyst Engn, Ames, IA USA
关键词： Bioaerosols; Emissions; Intensive swine production; Microorganisms
期刊名称：TRANSACTIONS OF THE ASABE （ 影响因子：1.188； 五年影响因子：1.695 ）
ISSN： 2151-0032
年卷期： 2019 年 62 卷 3 期
页码：
收录情况： SCI
摘要： Bioaerosols from concentrated animal feeding operations (CAFOs) pose potential adverse effects on the health and well-being of animals, workers, and the general public. Consequently, the topic of characterizing and mitigating bioaerosols associated with CAFOs continues to draw attention as the scale of animal production increases, especially in developing countries. This study was conducted to quantify indoor and downwind concentrations of airborne bacteria, including total bacterial count (TBC), Escherichia coli, Streptococcus, and Staphylococcus aureus, of a mechanically ventilated growing swine barn (210-head capacity) in suburban Beijing, China. The results revealed that the indoor airborne bacterial levels averaged 1.96 x 10(4) +/- 3.08 x 10(3) colony forming units (CFU) m(-3) for TBC, 2.29 x 10(3) +/- 5.04 x 10(2) CFU m(-3) for E. coli, 1.44 x 10(4) +/- 1.59 x 10(3) CFU m(-3) for Streptococcus, and 9.16 x 10(3) +/- 1.11 x 10(3) CFU m(-3) for S. aureus. The airborne microbe concentrations decreased with distance downwind of the swine barn. Specifically, at 10 m downwind, E. coli concentration decreased by more than 60%, while the other microorganisms decreased by 30% to 40%. All the bioaerosol microbes decreased by 55% to 70% at 30 m downwind. The relationships between the airborne bacterial concentration and downwind distance were depicted graphically and through linear regression equations.
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