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Industry Partners
Prairie Swine Centre is an affiliate of the University of Saskatchewan
Prairie Swine Centre is grateful for the assistance of the George Morris Centre in developing the economics portion of Pork Insight.
Financial support for the Enterprise Model Project and Pork Insight has been provided by:
Quality Assurance in Olfactometry
Posted in: Environment by admin on January 1, 1988 | No Comments
The results presented are not from agricultural application. However interesting information is given on the quality assurance in olfactometry and on the factors that have to be considered to analyse an odour situation. Emphasis has been put on the odour measurement of the threshold level but the psychophysical dose-effect relationship are not linear (odour unit vs. odour strenght). To have a complete ideal of the odour, odour quality and acceptability has to be of prime importance as those two factors give information that is not only perceptual but also related to social values. These factors have to be known as the perception of odour plays an important role in the generation of odor annoyance.
To improve the validity of odour measuments, a calibrated scale should be used to to able to compare the results.
Interesting elements are given to help make a link between factors (odour level, intensity and acceptability) that have to be measured and odor annoyance.
Odour and Ammonia Emission Following the Application of Pig or Cattle Slurry to Land
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Following the application of dairy or swine manure on to grassland, samples of odorous air have been taken
The air temperature during those experiments was relatively low and varied to a range of 0,4 to 1,4 C. The emission evaluation was done during 48h and odour emission stayed high during the first 4 to 5 hours after spreading. The odour rate was higher with the high application rate for this period but later, both application rates produced equivalent emissions.
The experiment were done at low temperature which may not be representative of all conditions.
A preliminary Assessment of Machines for Surface Spreading of Sludges and Slurries with Minimum Odour
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This is good review of 15 spreading equipment is given and the result can help in the equipment selection has shown in the abstract.
Tentative Calculations of Gaseous Emissions from Pig Houses by Way of the Exhaust Air
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The values given are only emissions from the livestock buildings and not from the manure storage or the manure spreading. The ammonia emission is estimated at 1,5 ton/year, 0,34 t/year of methane and 0,73 kg/year of hydrogen sulphide for 1000 pigs. Variation from those values can occur with management practices.
Experiences with the Use of Biofilters to Remove Odours from Piggeries and Hen Houses
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Drawing of biofilters are shown in the paper. For odour removal from pig housing, 50 cm thick of material is used and the biofilter can treat 290 m3/h of air per m2 of filter. Garbage compost and fibrous peat have been tested and the peat seems to be the best filter material as the porosity is high and the pressure demand is lower. Higher pressure demand will increase energy cost as the ventilator have to work harder to push the air through the biofilter. Such biofilter are relatively to maintenance however to assure good operation conditions de-dusting has to be done before the air enters the filter material and this material has to be kept moist (generally only during dry periods as the air coming from the building is relatively humid). No cost appreciation is given.
Gaseous health hazards in livestock confinement buildings
Posted in: Environment by admin on January 1, 1987 | No Comments
Lung function and respiratory symptoms in pig farmers
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Respiratory effects and dust exposures in hog confinement farming
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