Temporal variation in swine confinement indoor air quality.
Achutan C; Nelson ZE; Karsten AW; O'Shaughnessy PT
Livestock Environment VI: Proceedings of the 6th International Symposium, May 21-23, 2001, Louisville, Kentucky, R. R. Stowell, R. Bucklin, and R. W. Bottcher, eds., St. Joseph, MI: American Society of Agricultural Engineers, 2001 May; :579-586
Human health hazards can exist in swine confinement buildings due to poor indoor air quality especially as a result of high respirable dust and ammonia concentrations. The purpose of this study was to access the temporal variability of airborne dust and ammonia levels in a working farrowing facility over both a daily and seasonal basis. An ammonia sensor, aerosol photometer, internal relative humidity sensor, and datalogger containing an internal temperature sensor were mounted on a board suspended just above the worker breathing zone in the center of a room in the facility. Sensor readings were taken once every 4 minutes continuously between successive room washings, which occurred on a 3-week basis. Sensor readings, standard methods for the measurement of total and respirable dust concentrations, aerosol size distribution, and ammonia concentrations were taken once per week in addition to temperature and relative humidity measurements using a thermometer and sling psychrometer, respectively. Samples were taken between September 1999 and September 2000. The continuous readings of both dust and ammonia concentrations revealed a pattern that was inversely related to internal temperature and the related ventilation rate. This pattern was most apparent during weeks exhibiting large variations in daily external temperatures. As expected, seasonal differences demonstrated an increase in contaminant concentrations during the cold weather months. However, average dust concentrations were very low (<0.1 mg/m3) throughout the year. Likewise, ammonia concentrations averaged 3.6 ppm.
Agricultural industry; Agriculture; Air flow; Air quality control; Animal husbandry; Ventilation; Ventilation systems; Control technology; Indoor air pollution; Temperature regulation; Respirable dust; Ammonium compounds; Air quality measurement; Air sampling; Indoor environmental quality;
Author Keywords: Animal housing; air quality; real-time sensors
Department of Occupational and Environmental Health, The University of Iowa, 100 Oakdale Campus, IREH Building, Iowa City, Iowa 52240-5000
Stowell RR; Bucklin R; Bottcher RW
Research Tools and Approaches: Control Technology and Personal Protective Equipment
Livestock Environment VI: Proceedings of the 6th International Symposium, May 21-23, 2001, Louisville, Kentucky
Department of Occupational and Environmental Health, Institute for Rural and Environmental Health, The University of Iowa, Iowa City, Iowa 52242