Effect of spraying biological additives for reduction of dust and bioaerosolin a confinement swine house.
Ki Y Kim 1,  
Han J Ko,  
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Department of Preventive Medicine and Public Health, School of Medicine, AjouUniversity, Suwon 443-721, Korea.
Ann Agric Environ Med 2006;13(1):133–138
The aim of this on-site experiment is to evaluate and compare efficienciesof currently utilized biological additives to reduce emissions of dust and bioaerosol in a confinementswine house. The mean reduction rate of total dust only after spray ranged was approximately 30% forall the treatments, compared to initial level before spraying additives which was found to reduce theinitial level of total dust significantly (p < 0.05). The mean reduction rate of all the treatments at1 hr after spraying was about 24% which was 6% lower than only after spray. Since 3 hr after spraying,however, total dust level fluctuated inconstantly for all the treatments, besides application of soybeanoil. The mean reduction rates of all the treatments only after spraying as compared to initial levelbefore spraying were about 53% for total airborne bacteria (p < 0.01) and 51% for total airborne fungi(p < 0.01), respectively. At 1 hr after spraying, the reduction rate of total airborne fungi averagedto about 35% for all the treatments (p < 0.05), while insignificant reductions of total airborne bacteriawere found only in the treatments with salt water, soybean oil, artificial spice, and essential oil (p> 0.05). The fluctuations of total airborne bacteria and fungi, which were similar to total dust, wereobserved for all the treatments 3 hr after spray.