An Air Cleaning Efficiencies of Wet Air Cleaner in the Swine Finishing Winch Curtain Stall
2008
Oh, I.H. (Konkuk University, Chungju, Republic of Korea), E-mail: [email protected] | Kim, W.G. (Konkuk University, Chungju, Republic of Korea) | Lee, H.S. (Konkuk University, Chungju, Republic of Korea)
High concentration of NH₃, CO₂, and lots of dust are found in modern densely raising stall system, as results, they provide a negative influence on animal and farmer health, and production ability. Therefore, it is necessary to keep clean the inside of stall air to increase the productivity. A wet type air cleaner has been developed to clean the stall air. The work principle is that the inside air are sucked through the fan, and the rotating discs make a water into a fineness spray and blows into the stall. The spray can take the dust, NH₃, and odor from the stall inside air and give back to the circulating water, which can be refreshed in 2 hours interval. In the Present study, we measured the NH₃, dust, odor, temperature and humidity in a swine stall that were installed two wet air cleaners with 700 fattening swine with on-mode and off-mode of wet air cleaners. In fall, the concentrations of NH₃ in off-mode stall were maximum 24 ppm and minimum 16 ppm, and the average was 18.2 ppm. However in on-mode stall the NH₃ concentrations were maximum 7 ppm and minimum 1 ppm, and the average was 2.7 ppm. The concentration of NH₃ in on-mode was 74% lower than off-mode stall. Odor was measured by olfactometer. In the off-mode stall, the odor unit was 3,800 OU/㎥, but in the on-mode stall the odor unit was 2,100 OU/㎥. Odor removal efficiency was about 45% in on-mode stall. The dust measure was divided into 3 categories, PM∧10, PM∧2.5 and PM∧1.0. Whereas the PM∧10 showed no significant differences between the tests, PM∧2.5 and PM∧1.0 in the fine particle range reduced remarkably in the on-mode.
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