Presentation on theme: "Denis Choinière, ing. M.Sc. Environmental Division Consumaj inc. Consumaj."— Presentation transcript:
Denis Choinière, ing. M.Sc. Environmental Division Consumaj inc. Consumaj
IntroductionIntroduction 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
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 Phase 1 of the projetPhase 3 of the projet
ProblematicProblematic 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.
The Project: « Influence of Windbreaks on Odors » Initiated by Consumaj and their research team from Consumaj/ McGill University Completed with the following teams l’UPA St-Jean Valleyfield ITA de la Pocatière André Vézina Financial Partners LEI (Livestock Environmental Initiative) CDAQ (Conseil pour le développement de l’agriculture du Québec) MAPAQ (Ministère de l’Agriculture et des pêcheries et de l’alimentation du Québec)
ObjectivesObjectives 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.
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
Phase 1 - Dust 4 growing finishing piggeries 2 filtered samples and 2 non-filtered samples Measure odor concentration Farm AFarm BFarm CFarm DAll Without Filter 261 ou/m³195 ou/m³272 ou/m³478 ou/m³306 ou/m³ With Filter180 ou/m³219 ou/m³368 ou/m³303 ou/m³274 ou/m³ Conclusion Non-significant impact of dust on the sampling protocol
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
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) 1 low density 1 high density 1 low density 1 high density
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
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
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 ConclusionConclusion
AcknowledgementsAcknowledgements CDAQ IESE MAPAQ McGill University UPA St-Jean Valleyfield André Vézina Site Owners