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Oil mist reduces airborne hazards in concentrated swine feeding operation

A specially developed oil mixture reduced airborne levels of particulate matter at a concentrated animal feeding operation (CAFO) in a study conducted by researchers at the Johns Hopkins Bloomberg School of Public Health. The researchers evaluated an oil spray developed to reduce the airborne health hazards at industrial feeding facilities. Chronic respiratory illnesses are a serious concern for CAFO workers, as well as for the surrounding communities and animals themselves. The study, published in the current online edition of Environmental, Science and Technology, measured indoor air pollution in a mid-Atlantic swine facility. It found ten-fold reductions in the amounts of dust and bacteria in a barn where the spray was used compared with an identical barn where no spray was used. In contrast, however, the oil spray did not impact levels of ammonia, another pollutant generated from CAFO facilities.

"From the perspective of worker and community health, this is a step in the right direction," said Ana Rule, the study's lead author and a doctoral candidate at the Bloomberg School's Department of Environmental Health Sciences. "This technology addresses only a portion of the hazards workers and communities face from concentrated animal feeding facilities."

Rule explained there is growing interest in technologies that improve indoor air quality and control emissions to reduce the public health and environmental risks associated with raising large numbers of animals in confined spaces. In addition to particulate matter and ammonia, recent studies have shown that concentrated feeding operations also produce antibiotic-resistant pathogens. The oil spray technology provides animal producers with a tool to reduce some air pollution hazards to workers and neighbors, and help them comply with local, state and federal air pollution regulations. Although substantial improvement in barn air quality was achieved in the Hopkins study, questions remain as to whethe
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Contact: Tim Parsons
paffairs@jhsph.edu
410-955-6878
Johns Hopkins University Bloomberg School of Public Health
28-Nov-2005


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