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| Distribution of particulate matter and microbial aerosol concentration in different types of pig houses in winter |
| Received:November 26, 2018 |
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| KeyWord:pig house;particulate matter;bacterial aerosol;fungal aerosol |
| Author Name | Affiliation | E-mail | | HUANG Kai | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China | | | TANG Qian | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China | | | SHEN Dan | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China | | | DAI Peng-yuan | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China | | | LIU Jun-ze | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China | | | LI Yan-sen | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
National Experimental Teaching Demonstration Center of Animal Science, Nanjing 210095, China | | | LI Chun-mei | College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
National Experimental Teaching Demonstration Center of Animal Science, Nanjing 210095, China | chunmeili@njau.edu.cn |
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| Abstract: |
| This study aims to investigate the characteristics of particulate matter and microbial aerosols in different types of pig houses to provide basic data to improve air quality in large-scale pig houses. A TSI dust monitor was used to monitor the concentration of different sizes of particles(TSP, PM10, PM4, PM2.5 and PM1). Simultaneously, a ZYK-6 six-stage sieve percussion microbial sampler was used to sample microbial aerosols in three different types of pig houses, which are a gestational house, a delivery room and a nursery house. The monitoring and sampling height was 0.8 m away from the ground, and experiments were conducted 7 times a day(3:00, 7:00, 9:00, 11:00, 15:00, 17:00 and 22:00)for 3 consecutive days. In the gestational house, the average concentrations of TSP, PM10, PM4, PM2.5 and PM1 were 1.734, 0.760, 0.313, 0.270 mg·m-3 and 0.249 mg·m-3, respectively. The bacterial aerosol concentration was 6800~25 600 cfu·m-3, and the fungal aerosol concentration was 170~870 cfu·m-3. The average mass concentrations of TSP, PM10, PM4, PM2.5 and PM1 in the delivery house were 3.102, 1.385, 0.492, 0.408 mg·m-3 and 0.369 mg·m-3, respectively. Furthermore, the bacterial aerosol concentration was 4100~22 100 cfu·m-3 and the fungal aerosol concentration was 440~2480 cfu·m-3. In the nursery house, the average concentrations of TSP, PM10, PM4, PM2.5 and PM1 were 1.284, 0.572, 0.271, 0.245 mg·m-3 and 0.230 mg·m-3, respectively. The bacterial aerosol concentration was 2120~6850 cfu·m-3 and the fungal aerosol concentration was 160~1110 cfu·m-3. Our findings show that the bacterial aerosol concentration in the gestational house, delivery room and nursery house and most fungal aerosols, are mainly distributed in the range of a particle size less than 3.3 μm. The correlation analysis between particulate matter and microbial aerosol suggests that fungal aerosols and bacterial aerosols, whose particle sizes are less than 1.1 μm may float in the air independently in the form of spores or hyphae. |
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