Abstract
Total suspended particulate (TSP) concentrations, ammonia (NH3) concentrations, and ventilation rates weremeasured in four commercial, tunnelventilated broiler houses in June through December of 2000 in Brazos County, Texas.TSP and NH3 concentrations ranged from 7,387 to 11,387 .g m3 and 2.02 to 45 ppm, respectively. Ammonia concentrationexhibited a correlation with the age of the birds. Mass median diameters (MMD) of the TSP samples were between 24.0 and26.7 .m aerodynamic equivalent diameter. MMD increased with bird age. The mass fraction of PM10 in the TSP samples wasbetween 2.72% and 8.40% with a mean of 5.94%. Ventilation rates were measured between 0.58 and 89 m3 s1. Measuredconcentrations of PM10 and ammonia were multiplied by the measured ventilation rates to calculate emission rates for PM10and ammonia. Ammonia emission rates varied from 38 to 2105 g hr1. TSP emission rates and PM10 emission rates rangedfrom 7.0 to 1673 g hr1 and 0.58 to 99 g hr1, respectively. Emission rates for ammonia and particulate matter increased withthe age of the birds. Most of the PM in the commercial broiler houses was large enough to be captured by the human or poultryrespiratory system prior to being inhaled into the lungs.
Published Version
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