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Odor measurements for manure spreading using a subsurface deposition applicator
Anthony Lau1, Shabtai Bittman, Gladis Lemus
1Chemical and Biological Engineering, University of British Columbia, Vancouver, BC, Canada. aklau@interchange.ubc.ca
Summary
Sub-surface deposition systems significantly reduce odor emissions from pig manure application by 8% to 38% compared to splash-plate applicators. This method offers a practical solution for reducing odor complaints near urban areas.
Area of Science:
- Agricultural Engineering
- Environmental Science
- Odor Management
Background:
- Manure spreading causes odor concerns, especially near urban areas.
- Reducing odor emissions is crucial for agricultural operations adjacent to communities.
- Existing manure application methods vary in their odor generation potential.
Purpose of the Study:
- To compare odor concentrations and emission rates from pig manure application.
- To evaluate the effectiveness of a sub-surface deposition system versus a conventional splash-plate applicator.
- To identify methods for mitigating odor pollution from agricultural practices.
Main Methods:
- Air samples collected using Surface Isolation Flux Chamber and bag-in-vacuum chamber techniques.
- Odor concentration determined by an odor panel using a dynamic dilution olfactometer.
- Measurements taken at 0.5, 1.5, and 2.5 hours post-manure application.
Main Results:
- Sub-surface deposition system reduced odor emission rates by 8% to 38% compared to splash-plate.
- The most significant odor reduction was observed during the peak offensive period post-application.
- Odor strength and emission rates were consistently lower with the sub-surface system.
Conclusions:
- Sub-surface deposition systems effectively reduce odor emissions during pig manure application.
- This technology presents a viable alternative for producers to minimize odor complaints.
- It offers a less problematic solution than deep injection for odor control.