The total number of dust particles and the portion of the respirable dust fraction in the air of a swine fattening building
2001
Djordjevic, M. | Vucinic, M. | Radenkovic-Damnjanovic, B. (University of Belgrade, Belgrade (Yugoslavia). Faculty of Veterinary Medicine, Department of Animal Hygiene)
In swine fattening units, where animals are densely confined, dust from the animals, their skin, hair, feces and urine and their feed, especially during agitation and emptying, can rise to harmful levels both for workers and pigs. Dust level is the highest in winter, although it increases whenever pigs are fed, handled, or moved. At least one third of dust particles are within the respirable size range and can affect lung tissues, large and small airways. Considering all problems that occur with dust in swine confinement buildings, the aim of the study was determination of the portion of respirable dust fraction in the total number of dust particles throughout the fattening period. The experiment was carried out on one pig farm near Belgrade (Yugoslavia) in 1999 and 2000 during the winter months. The results obtained by the conimetric method point to the large amount of respirable dust particles (greater than 70%) in all dust samples taken from the air at all vertical levels above the floor (20, 50 and 170 cm) in the full fattening pig unit (180 pigs).
显示更多 [+] 显示较少 [-]