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Influence of Environmental Factors on Concentrations and Inorganic Content of Aerial Dust in Swine Finishing Buildings
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1988
Year
Inorganic ContentEnvironmental ChemistryAir SamplingEnvironmental MonitoringEngineeringEnvironmental EngineeringAir QualitySufficient AirflowSwine Finishing BuildingsAerial Dust ParticlesAir CleaningFly AshIndoor Air QualityAir PollutionAnimal Waste ManagementAerial Dust
ABSTRACT THE total mass concentration of aerial dust particles in 11 swine finishing units averaged 8.1 mg/m^ during a 9-month survey and exceeded the 15 mg/m^ OSHA threshold in 13 of 88 farm visits. The average particle number concentration from 75 samples of 1.76 to 7.01 jjim diameter particles was 11.2/mL. Total particle mass and number concentrations were significantly related (P<.10) to ventilation type, outside air temperature, inside/outside air temperature difference, and inside relativehumidity. Inorganic contents of aerial and settled dust were 13.2 and 14.2%, respectively. Measures to remove aerial dust should emphasize proper management of ventilation equipment to assure reliable and sufficient airflow.