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Air Quality Measurements from a Water-Sprinkled Beef Cattle Feedlot in Kansas

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2007 ASAE Annual Meeting  074108.(doi:10.13031/2013.23643)
Authors:   Edna B Razote, Ronaldo G Maghirang, James P Murphy, Brent W Auvermann, Joseph P Harner, III, Darrell L Oard, William L Hargrove, David B Parker, John M Sweeten
Keywords:   Cattle feedyard, PM10 emission, sprinkler system, dust control

Water sprinkling has been considered a best management practice for mitigating particulate matter (PM) emissions from open beef cattle feedlots; however, limited data are available on its impact on air pollutant emissions from the feedlots. This research measured the concentrations of PM10 (particulate matter with nominal aerodynamic diameter of 10 um or less) downwind and upwind of a water-sprinkled commercial cattle feedlot in Kansas. PM10 concentrations were measured with collocated Tapered Element Oscillating MicrobalancesTM (TEOMs), federal reference method (FRM) high-volume PM10 samplers, and FRM low-volume PM10 samplers. In addition to the PM10 concentration, the following parameters were monitored: (1) concentration of total suspended particulates (TSP) downwind and upwind of the feedlot; (2) particle size distribution downwind of the feedlot; (3) odor detection threshold (DT) upwind and downwind of the feedlot; (4) manure moisture content; (6) weather conditions; and (7) sprinkler water use. Measured PM10 concentrations varied considerably with sampling periods. PM10 concentrations were generally higher during the early evening hours within a given day and during the summer months. PM10 mass concentration also generally decreased with an increase in manure moisture content. Comparison of collocated PM10 samplers showed that the measured PM10 mass concentration was largest with the TEOM PM10 sampler and smallest with the low-volume PM10 sampler. Odor DTs, upwind and downwind of the feedlot, also varied considerably and ranged from 11 to 101 OU/m3 and 13 to 99 OU/m3, respectively. The operation of the water sprinkling system and manure moisture content did not seem to influence mean odor DT.

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