Using Olfactometry to Measure Intensity and Threshold Dilution Ratio for Evaluating Swine Odor |
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| Authors: | Yongcheng Chen Dwaine S. Bundy Steven J. Hoff |
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| Affiliation: | 1. North Carolina Department of Environment and Natural Resources, Division of Air Quality , Fayetteville , North Carolina , USA;2. Department of Agricultural and Biosystems Engineering , Iowa State University , Ames , Iowa , USA |
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| Abstract: | ABSTRACT Intensity and threshold dilution ratio are two important indices for odor control of swine buildings. Although odor threshold dilution ratio is a widely used index to describe an odor, it should be related to intensity to be more useful. A method was proposed to measure both indices simultaneously by using a dynamic forced-choice olfacto-meter. Four air samples were taken from each of four swine rooms including farrowing, finisher, gestation, and nursery. A panel of eight people was used to evaluate odor intensity. Odor threshold dilution ratios were calculated according to the American Society for Testing and Materials (ASTM) Standard Practice E679-91 to be 333, 424, 25, and 221 for samples collected from farrowing, finisher, gestation, and nursery rooms, respectively. After the samples were diluted 14.7 times, the odor intensities were evaluated to be 3.79, 3.46, 0.48, and 4.0 for the above-mentioned rooms, respectively. The data collected were used to develop a mathematical model. |
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