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Denis Choinire, ing. M.Sc.
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Title: Denis Choinire, ing. M.Sc.
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Odor Reduction With Windbreaks
- Denis Choinière, ing. M.Sc.
- Environmental Division
- Consumaj inc.
2
Introduction
- Livestock activity ? Produces odor
- Impact on the cohabitation with the neighborhood
- Natural windbreaks were identified as a potential
measure to reduce the present problem - The implantation of natural windbreaks around
buildings is promoted by different organisations
such as FPPQ, MAPAQ. - Method that is welcomed by producers and their
neighborhood
3
Introduction Odor Windbreaks
- Windbreaks may reduce odors in many ways
- By facilitationg dust deposits
- By physically intercepting dust
- By diluting odorous gases with increased
turbulence - By absorbing certain componants of the odor
4
Problematic
- Many hypotheses ? few are scientifically
validated - Tyndall and Collecti (2000) propose the
hypothesis that farms would almost become
inodorous if all dust was removed. - It is demonstrated that windbreaks facilitate
dust deposits (like they do for snow or sand) - So if dust contributes largely to odor
transportation, windbreaks should reduce odors
from livestock operations. - This is a hypothesis which has not yet been
validated scientifically with direct odor
measurements.
5
The Project Influence of Windbreaks on Odors
- Initiated by Consumaj and their research team
from Consumaj/ McGill University - Completed with the following teams
- lUPA St-Jean Valleyfield
- ITA de la Pocatière ? André Vézina
- Financial Partners
- LEI (Livestock Environmental Initiative)
- CDAQ (Conseil pour le développement de
lagriculture du Québec) - MAPAQ (Ministère de lAgriculture et des
pêcheries et de lalimentation du Québec)
6
Objectives
- Quantify the influence of natural windbreaks on
odor dispersion/reduction - Evaluate the tree species influence on odor
dispersion/reduction - Evaluate the influence of the distance between
the windbreaks and the odor emission source - Quantify the impact of odor windbreaks on
separating distances, that is, to estimate new
seperating distances according to the odor
windbreaks established.
7
The Phases
- Phase 1
- Validate the impact of dust on the sampling
protocol and odor measurement - Phase 2
- Develop a mobile odor generator
- Phase 3
- Experiment the influence of windbreaks on odor
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Phase 1 - Dust
- 4 growing finishing piggeries
- 2 filtered samples and 2 non-filtered samples
- Measure odor concentration
- Conclusion
- Non-significant impact of dust on the sampling
protocol
9
Phase 2- Odor Generator
- Degasser principle, maximises the contact between
manure and air - Uses fattening pigs manure
- Built for a regular size truck box
- Produces 500 to 1000 odor units/sec
- Air flow of 3600 CFM
- Odor production adjusted as needed
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Phase 2- Odor Generator
Dilution duct
8 degasser cubes
Air - manure contact 338 m²/m³
Recirculation pump
Ventilator Variable speed
Manure tank
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Phase 2- Odor Generator
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Phase 3- Windbreaks
- Do tests on existing mature windbreaks
- Site with little interference with odors from
animals - 2 deciduous windbreaks
- 2 evergreen windbreaks
- 3 distances - odor source / windbreak (15m 30m
60m) - 5 replicas (high density)
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Site 1
- Deciduous, low density
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Site 2
- Deciduous, high density
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Site 3
- Evergreens, low density
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Site 4
- Evergreens, high density
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Phase 3- Windbreaks
- Field Methodology
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Phase 3- Windbreaks
- Odor nuisance scale
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Data Interpretation
- Analyse odor generator samples with the dynamic
olfactometer to measure the odor concentration
and the odor nuisance. - Define the relation for each panellist
- Odor nuisance ? Odor concentration
- Transform the odor nuisance field data to an odor
concentration for each position in the field
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Data Interpretation
- Combine those field odor concentrations with
- Odor source emission rate
- Number of dilutions from source to field point
- Wind direction
- UTM coordinate
- Absolute distance from source
- Distance from source - parallel and perpendicular
to wind direction - Make a large spreadsheet with all this
information and use it for the analysis
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Effect on Plume Length
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Effect on Plume Area
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Effect on Average Odor Dilution
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Conclusion
- Windbreak performance to reduce odors is better
when windbreak is at 15m from the source then at
30m or 60m - Windbreaks can reduce separation distance from
livestock operations and neighbors by 19 to 25 - Windbreaks can reduce the area affected by the
odor by 30 to 37 - Windbreaks can also reduce the odor concentration
within the odor plume - Low porosity (below 30) windbreak is needed to
have a measurable effect on the odor
25
Acknowledgements
- CDAQ
- IESE
- MAPAQ
- McGill University
- UPA St-Jean Valleyfield
- André Vézina
- Site Owners
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Question Period
- Thank-you for your attention!
