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MEASUREMENTS
OF ODOUR AND HYDROGEN SULFIDE EMISSIONS FROM SWINE BARNS |
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Research
team: Q. Zhang, X.J. Zhou, G. Plohman |
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Odour and hydrogen sulfide
(H2S) emissions were measured on ten swine farms in southern
Manitoba between May and October in 1999 and 2000. On each selected
farms, air samples were taken from barn exhaust and manure storage.
Odour levels (concentrations) of collected samples were determined
by using a dynamic-dilution olfactometer. A Jerome was used
to measure hydrogen sulfide levels of air samples from six farms.
The average odour levels from barn exhaust ranged from 131 to
1842 OU. No apparent correlations were found between the odour
level and the general farm characteristics, such as the age
and type of operation, ventilation system, and manure handling
system. The average H2S levels spanned from 148 to 927 ppb on
the six farms. Outdoor temperature had a significant effect
on odour levels from barn exhaust, but not on odour emission
rates (in a range from 12 to 39C). The odour level measured
within 10 mm of manure surface was the highest in May and the
lowest in July in earthen manure storages. Low odour levels
were measured in an earthen manure storage with straw cover
that formed a thick crust on the manure surface. |
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