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Title: Vegetative buffers for swine odor mitigation - wind tunnel evaluation of air flow dynamics

Author
item Sauer, Thomas
item HAAN, FRED - IA STATE UNIVERSITY
item TYNDALL, JOHN - IA STATE UNIVERSITY
item HERNANDEZ, GUILLERMO - 3625-15-15 USDA-ARS-NSTL
item Trabue, Steven - Steve
item Pfeiffer, Richard
item Singer, Jeremy

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/4/2008
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Scale model wind tunnel experiments were completed to determine the effectiveness and feasibility of vegetative buffers to mitigate swine odor and particulate transport. Three series of wind tunnel experiments were completed. The first included four swine housing unit models and either a slurry tank or lagoon model downstream. Evaporation from the tank and lagoon models was monitored during runs with 0.5 and 2 m/s air velocities and parallel and transverse building orientations. Runs were completed with and without 5.25 mm-tall (2") tree models constructed from 8 x 8 wire mesh to simulate a forested landscape. The model forest consisting of eight rows of trees perpendicular to air flow positioned upstream of the building models and/or downstream of the manure storage models. The second series of experiments included air velocity profile measurements near a scale-model of an actual deep pit production facility with three buildings and two rows of trees on two sides. Measurements were taken with air velocities of 0.5, 2, and 5 m/s at separation distances of one, two, and six times the building height. The third study included similar velocity profile measurements but for scale models of a field site with ongoing odor and particulate monitoring within and outside an existing vegetative buffer. Tree models spacing and orientation were then manipulated to develop an optimal arrangement for air flow management at the facility. Results from each study will be interpreted with regard to the impact of vegetative buffers on air flow, the effect on transport from buildings and manure storage structures, and prospects for optimizing buffer design to minimize offsite odor and particulate transport.