Research into pig farm emissions
Anyone downwind of a pig barn knows that animal
production facilities generate some notable emissions. Now Agricultural Research
Service (ARS) scientists have conducted research into how the location and
placement of buildings and waste-storage facilities affects the transport of
odour constituents like ammonia and hydrogen sulphide.
Preliminary findings from the wind tunnel studies indicate that positioning
farm buildings perpendicular to prevailing winds could help reduce odours from
downwind lagoons or tanks.
Wind speed and direction, topography, structures, facility management,
climate and vegetative cover all influence airflow--and influence where these
agricultural emissions end up.
ARS scientists Tom Sauer and Jerry
Hatfield are using a wind tunnel to model how air emissions from animal
production facilities travel across the landscape. The scientists, who both work
at the ARS National Soil Tilth Laboratory in Ames, Iowa, used a 40-foot wind
tunnel for their research.
The â€œwindâ€ was produced by a blower at one end
of the tunnel that generated maximum wind speeds of 30 miles per hour.
Sauer and Hatfield built a test â€œfarmâ€
in the wind tunnel that had scale replications of swine finishing units,
aboveground slurry tanks and lagoons. They arranged four of these model
buildings on their â€œfarmâ€ in several different configurations with the model
ARS is a scientific research agency of the U.S.
Department of Agriculture. Related WebsiteARS
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