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KMID : 1039220210310040331
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Journal of Korean Society of Occupational and Environmental Hygiene
2021 Volume.31 No. 4 p.331 ~ p.341
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Relationship and Characteristics of PM10 and Endotoxin Concentrations in Windowless Poultry Houses in South Korea
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Kim Hyo-Cher
Sin So-Jung
Kim Kyung-Su
Jung Won-Geon
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Abstract
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Objectives: The aim of this study was to evaluate the concentrations and relationships of coarse particles with a diameter of 10 μm (PM10) with endotoxins according to the time of measurement in windowless poultry houses.
Methods: In this study, measurement was performed on ten windowless poultry houses with a vertically integrated system from July to November. PM10 was measured using personal environmental monitors and polytetrafluoroethylene (PTFE) filters with a 4 L/min-calibrated pump in selected sampling locations (two near the door and two near an exhaust fan). The endotoxin on PTFE filter was analyzed by the LAL turbidimetric method.
Results: The range of geometric mean concentrations of PM10 and endotoxins for each of the 38 samples were 0.12-3.30 mg/m3 and 11.9-3553.66 EU/m3, respectively. PM10 and endotoxin concentrations varied by farm, increasing with the decrease in ventilation. The range of the coefficient of determination between PM10 and endotoxin was 0.0009-0.9249. As the atmospheric temperature decreased, it was confirmed that the concentrations of PM10and endotoxin increased because the volume of ventilation was decreased.
Conclusions: Endotoxins were more affected by time of measurement and ventilation than PM10, which means that endotoxins could be an important indicator for intervention programs for improvement of indoor environments.
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KEYWORD
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PM10, endotoxin, poultry house, exposure
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