Abstract
A dynamic, sizedependent integrated inhalation dose model for quantifying worker/animal exposure todustborne odor causing volatile organic compounds (VOCodor) in swine buildings during and after feeding was developed.The exposure of dustborne VOCodor observed in pig barns can be characterized by adsorption and deposition of airbornedust. The airborne dust particle size, aerosol profile, enclosure dimension, ventilation rate, and feeding duration wereaffecting the integrated inhalation model in assessing dustborne VOCodor exposure during and after the time of feeding.Experimental results show that there is no significant variation in feeding and nonfeeding periods for the particle sizedistributions in a growing pig farm located in southern region of Taiwan and both followed a lognormal distribution withgeometric mean diameter of 2.14 0.03 m (mean 1 sd) and geometric standard deviation of 1.73 0.02. Mean total dustmass concentrations were 20.47 8.23 and 2.32 0.45 mg m 3 , respectively, for feeding and nonfeeding periods. Modelsimulations show that the inhalation dose for a short feeding duration followed by a long stay in the pig barn can equal thatof a long feeding duration followed by a short subsequent exposure. Reduction of both the feeding duration and/or subsequenttime in the pig barn is highly effective in dose reduction.
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