But increasing the ventilation rate does not effectively reduce the overall dust level because the dust production rate increased with an increase of ventilation rate. There is a large variation in overall dust level with the diurnal change. The overall dust level during the daytime is much higher than the nighttime, likely due to the animal activities which changed the airborne dust production. Measured dust spatial distribution shows that air cleaning can reduce the dust level. To improve the overall dust removal efficiency, large flow rate of the dedusters is required.
Oil sprinkling at regular frequency is an effective measure to control the dust level.
The authors thank Steve Ford and Peter Stroot for their technical assistance in the setup of dust sampling system. We also extend our thanks to Brian Anderson, Jerry Edwards, Al Gutival and J.R. Hubele for their help on the measurement. J.R. Dawson, A. Battams and R.A.C. Nicol. Spatial variability of airborne and settled dust in a piggery. W.D. Morrison and L.A. Braithwaite.