UBC Faculty Research and Publications

Evaluation of the performance of vegetative buffers for emission reduction of particulate matter from poultry facilities Adderley, Christopher; Christen, Andreas


Emissions of particulate matter from poultry facilities can impact local resources, animal and human health, and can be a potential pathway for the transmission of diseases. This report determines the effectiveness of various vegetative buffers layouts as a potential measure reducing particulate matter emissions leaving poultry facilities. Vegetative buffers modify the airflow and filter the air flowing through them, which can enhance the deposition of particulate matter on leaves and ground, and redistribute zones of major deposition. The report summarizes five case studies of poultry facilities in the Lower Fraser Valley, BC, Canada. It demonstrates that appropriate choice of vegetative buffer layout (composition and placement) can affect overall emissions from poultry facilities and hence reduce deposition on neighboring properties. The use of effective buffer layouts allows part of the emitted particulate matter to be intercepted before leaving the property. The simulations predict that the fraction of total PM10 emissions intercepted by the buffer ranges between 0.62 to 4.38%. In relative terms, total deposition on the property can be increased between 10.81% and 29.37% with effective buffer configurations. Deposition on neighboring properties is predicted to be lowered between -­‐2.05 and -­‐7.62%. In conditions where the buffer is placed directly in front of the source fans and wind directing particulate matter directly into the buffer, highest interception was achieved (filter effect). In other cases, buffers disrupt wind patterns modifying air flows and hence affect spatial deposition patterns (deflection effect). Layouts with corner structures were more effective, as were layouts including double rows and full enclosure around the emission sources. Although these simulations show that buffers can be effective to control (reduce) deposition on selected neighboring properties of concern (up to 7.62% reduction), their impact is limited in terms of overall emission reduction to the environment as overall reduction simulated was less than 3.12%.

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