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West Lafayette, IN 47907-2093
Phone: (765) 494-1214
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Odor Based Setbacks
The Purdue Agricultural Air Quality Laboratory (PAAQL)
members have put in much effort developing this guideline. However, the
intricate issues involving odor measurement, dispersion modeling, and lack
of in situ validation have hindered the refinement of the guideline.
Neither PAAQL nor
Multi-Source Odor Setback Model - 2nd Gen. (Excel Edition)
Multi-Source Setback Model for Swine and Dairy [Indiana Soybean Alliance Project]
NOTE: Due to continuous updates being made, please do not save the Multi-Source Setback Model for offline use.
Total-Site Odor Setback Models - 1st Gen.
Interactive Total-Site Setback Model for Swine [National Pork Producer Council (NPPC) Project]
Odor control is a major concern of livestock producers in the United States. The use of atmospheric air to dilute odors from livestock facilities by appropriate setback distances is still the most popular and cost-effective strategy to reduce odor nuisance. However, the determination of odor-based setbacks for livestock facilities is a difficult and complex problem with only limited supporting data in the U.S.
A simple-to-use, site-specific setback guideline was developed by Purdue University for U.S. swine production systems. This guideline considers facility size, orientation and shape, wind frequency, land use, topography, building design and management, manure handling characteristics, and odor abatement effectiveness. Odor emission factors were based in part on actual odor emission measurements in commercial buildings. Atmospheric dispersion models were used to enhance and validate the setback guideline. This interactive setback model combines features of Austrian and British setback guidelines (Schauberger and Piringer, 1997; Williams and Thompson, 1985) (click on Austrian guideline to read about it) and incorporates new features developed through our research. The Purdue guideline is as follows:
Setback distance in feet = 20 F L T V (AEE+ASS)0.5
Williams, M.L. and N. Thompson. 1985. The effects of weather on odour dispersion from livestock buildings and from fields. In: Odor Prevention and Control or Organic Sludge and Livestock Farming. Ed: V.C. Nielsen, J.H. Voorburg, and P.L'Hermite. Elsevier Applied Science Publishers, New York. Pp. 227-233.