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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:
Novel Technology for Hog Manure Odour Control/Remediation
Posted in: Environment by admin on January 1, 1999 | No Comments
The project explores application of crystal engineering principles to establish the ability of organic clays and metal-organic coordination polymers to retain odour-causing molecules through sorption or adsorption as an odour control and remediation process. The sorption capability of each material was compared with activated charcoal. The study suggests the two materials could be incorporated into a design for a sensor to identify odour problems related to manure storage or transportation and that the adsorption capacity of the synthetic materials exceeds current industry standards.
Bacteria nad Nutrient Transport to Tile Lines Shortly After Application of Large Volumes of Liquid Swine Manure
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This study focused on the potential bacteria and nutrient contanimation of subsurface agricultural drainage with differing manure application rates on different types of tillage practices. Manure was surface applied to conventional and no-till practices at rates of 2.8 cm and 8.3 cm. The subsurface drainage water was analyzed for volume, pathogenic bacteria and nutrient concentrations. The results indictate higher manure applicaton rates produce higher levels of nutrient and bacteria containimation within 1 hour of application. The conventional tillage operation seemed to have a lower level of contaimination, resulting from reduced macropore flow from the tillage operation.
Phosphorus Practices for Animal Waste Application Fields
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Most management plans have been balanced for nitrogen plant uptake, however this can lead to elevated soil phosphorus (P) levels with repeated manure applications. Elevated P levels in water sources can lead to eutrophiication, which occurs when there is an abundant source of nutrients in the water source. To aid in decreasing the impact of phosphorus on water sources, a phosphorus risk index (PRI) was develoeped for manure management on dairy operations in North Central Texas. The objective of the PRI was designed to evaluate the risk of P movement from manured fields, identify areas with high potential for P runoff, determine causes of P risk and measure the change in risk over time with changes in P management strategies.
The PRI uses nine weighted indexing parameters that reflect the importance of each factors contribution in the potential risk of P runoff. These include: proximaity to waterbodies, erosion potential of the site, runoff potential of the site, soil test phosphorus levels, manure application rate, manure application method, timing of manure application, vegatative management, grazing management. Each parameter was also assigned a risk category for P runoff as very low, low, medium, high or very high. Individual tracts of land were rated according to the above parameters and given a risk assesment score, and this score corresponded to a relative risk category. This indexing procedure helps to identify potential P problems with potential fields and oulinres best management practices to address P concerns, and aid in the development of nutrient management plans.
Removal of Malodorous Componds from Liquid Swine Manure by Subsurface Constructed Wetlands in a Greenhouse
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The relationship between two wetland systems (planted, unplanted) and their relationship to concentration of three malodorous compounds (dimethyl disulfide, ethyl acetate, p – cresol) was studied. Eight subsurface flow wetlands (4 planted, 4 unplanted) were treated liquid swine manure that was filtered through bark bed in order to reduce the total solids content. A human sensory panel was set up to evaluate the wetland effluent odour, and the reduction of the malodrous gas compounds was quantified using gas chromatography.
ANOVA analysis revealed a significant decrease in malodrous compounds in the planted wetland plots relative to the unplanted plots. On average, the planted wetlands removed between 60 – 80% of malodorous compounds, while the unplanted plost remobed between 35 – 70%. Sign tests of the odour anel indicate the intensity level ranking was <1 for the planted wetland structure, signifying no objectional effluent smell from the filtered swine wetland effluent.. In conclusion, planted wetlands outperformed unplanted wetlands at removing malodorous compounds from liquid swine manure and producing wetland effluent that was not objectional to the sensory panel.
Contract Hog Production and Environmental Management in the Southern United States
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Development of a Treatment Technology using Lime, Lime-clay Combination and Plant Derived Phyto chemicals for Eliminating Odour from Hog Operations
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Many products currently on the market are designed to mask the odour or deodorize the air rather than affect the actual production. This study describes a technology which acts on the root cause of these odours a
Heavy metal contents of livestock feeds and animal manures in England and Wales
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Mass Transfer Coefficient of Ammonia in Liquid Swine Manure and Aqueous Solutions
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