Dust particle net generation rates, based on the particle concentration data obtained in a commercial poultry facility during a complete laying season of one flock of birds, were calculated and compared to published values. The layer house was mechanically ventilated with a housing capacity for 112,000 caged birds. Two seasonal (hot and cold) ventilation rates were used at different times during the 14 weekly sample periods that are included in this study. The daily lighting scheme in the house consisted of 17 lighted hours followed by 7 darkened hours. Hourly dust particle net generation rates for respirable and total particles were calculated. For the 14 tested weeks, mean particle volume generation rates were 0.76 mm3/h·bird and 1.06 mm3/h·bird, respectively, for respirable and total particles. Based on a measured particle density of 1750 kg/m3, the mean mass generation rates of respirable and total particles were 1.32 mg/h·bird and 1.84 mg/h·bird, respectively. Both respirable and total particle generation rates were significantly (P<0.05) influenced by both ventilation rate and lighting levels.
|Original language||English (US)|
|Number of pages||7|
|Journal||Transactions of the American Society of Agricultural Engineers|
|State||Published - Sep 1992|
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)