|BUSER, MICHAEL - Oklahoma State University|
|BOYKIN, J - Retired ARS Employee|
Submitted to: World Wide Web
Publication Type: Other
Publication Acceptance Date: 3/31/2015
Publication Date: 3/31/2015
Citation: Buser, M.D., Whitelock, D.P., Boykin, J.C., Holt, G.A. 2015. Particle size distribution characteristics of cotton gin cyclone robber system total particulate emissions. National Cotton Gin Technical Reports. Report #OSU13-13. Available: http://buser.okstate.edu/air-quality/cotton-gin/technical-reports/
Technical Abstract: This report is part of a project to characterize cotton gin emissions from the standpoint of total particulate stack sampling and particle size analyses. In 2013, EPA published a more stringent standard for particulate matter with nominal diameter less than or equal to 2.5 µm (PM2.5). This created an urgent need to collect additional cotton gin emissions data to address current regulatory issues, because EPA AP-42 cotton gin PM2.5 emission factors did not exist. In addition, current EPA AP-42 emission factor quality ratings for cotton gin PM10 (particulate matter with nominal diameter less than or equal to 10 µm) data are questionable and extremely low. The objective of this study was to characterize particulate emissions for cyclone robber systems from cotton gins located in regions across the cotton belt based on EPA-approved total particulate stack sampling methodologies and particle size analyses. Average measured PM2.5, PM10 and PM10-2.5 emission factors based on the mass and particle size analyses of EPA Method 17 total particulate filter and wash samples from three gins (12 total test runs) were 0.00042 kg/227-kg bale (0.00093 lb/500-lb bale), 0.0061 kg/bale (0.013 lb/bale), and 0.0057 kg/bale (0.013 lb/bale), respectively. The cyclone robber system particle size distributions were characterized by an average mass median diameter of 20.28 µm (aerodynamic equivalent diameter) and a geometric standard deviation of 3.99. Based on system average emission factors, the ratio of PM2.5 to total particulate was 2.1%, PM2.5 to PM10 was 6.9%, PM10 to total was 30%, and PM10-2.5 to total was 28%. Particle size distribution based system average PM2.5 and PM10 emission factors were 23% and 60% of those measured for this project utilizing EPA-approved methods. The particle sized distribution based PM10 emission factor was 26% of that currently published in EPA AP-42.