Windbreaks For Odour Dispersion
Author(s)
S. Barrington, L. Xingjun, D. Choinière & S. Prasher
Abstract
Windbreaks are believed to help disperse odours emitted by livestock facilities.
This project compared odour dispersion for a site without and another with a
windbreak consisting of a single row of deciduous trees with an optical porosity
of 35%. Both sites, without and with a windbreak were subjected to the emission
of swine manure odours produced by an odour generator and the resulting odour
plume was measured by three groups of four trained panellists calibrated using a
forced choice dynamic olfactometer. This calibration was used to relate the
group’s field odour intensity perception to an actual odour concentration in
odour units (OU). In September 2004, the windbreak site was evaluated 15 times
while the site without a windbreak was evaluated 4 times. The odour plume
which developed on both sites was found to be quite erratic with zones of high
odour concentration intercepted and others of low and even non-detectable odour
concentration. Nevertheless, a regression method using classification for the data
on each site indicated that the windbreak could reduce the odour dispersion
distance by 20%, on the average.
Keywords: windbreak, odour dispersion, separation distance.
1 Introduction
The development of the livestock industry in North America and in Europe is
jeopardized by their emissions of odours which are a nuisance for neighbours.
These odours are produced mainly during the handling of manures, but can also
originate from feed storage and dust emissions. Since there are no technologies
which can completely eliminate these odours, livestock operations and
environmental authorities use air dilution as remediation measure. The concept
consists in building the livestock operation far enough that ambient climatic and
Keywords
windbreak, odour dispersion, separation distance.
Related Book
Other papers in this volume
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