|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 first stage mote system total particulate emissions. National Cotton Gin Technical Reports. Report #OSU13-10. 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 included combined mote cleaner PM10 (particulate matter with nominal diameter less than or equal to 10 µm) and total particulate emission factors and not individual mote cleaner system emission factors. The objective of this study was to characterize particulate emissions for 1st stage mote 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 five gins (14 total test runs) were 0.00063 kg/227-kg bale (0.0014 lb/500-lb bale), 0.0091 kg/bale (0.020 lb/bale), and 0.0084 kg/bale (0.019 lb/bale), respectively. The 1st stage mote system particle size distributions were characterized by an average mass median diameter of 16.37 µm (aerodynamic equivalent diameter) and a geometric standard deviation of 3.85. Based on system average emission factors, the ratio of PM2.5 to total particulate was 2.5%, PM2.5 to PM10 was 6.9%, PM10 to total was 36%, and PM10-2.5 to total was 33%. Particle size distribution based system average PM2.5 and PM10 emission factors were 15% and 45% of those measured for this project utilizing EPA-approved methods. The particle sized distribution based PM10 emission factor was 15% of that currently published in EPA AP-42 for the mote fan which is equivalent to a combined 1st and 2nd stage mote system.