Submitted to: World Wide Web
Publication Type: Other
Publication Acceptance Date: 1/25/2013
Publication Date: 1/25/2013
Citation: Buser, M.D., Whitelock, D.P., Boykin Jr, J.C., Holt, G.A. 2013. 2nd stage mote system PM2.5 emission factors and rates for cotton gins. National Cotton Gin Technical Reports. Report #OSU12-11. Available: http://buser.bioen.okstate.edu/air-quality/national-cotton-gin-technical-reports.
Technical Abstract: This manuscript is part of a series of manuscripts that detail a project to characterize cotton gin emissions from the standpoint of stack and ambient sampling. The impetus behind the project was the 2006 EPA implementation of a more stringent standard for particulate matter less than or equal to 2.5 micrometers (PM2.5) and the fact that there was very little available cotton gin PM2.5 emissions data. The objective for this study was the development of PM2.5 emission factors for cotton gin 2nd stage mote systems based on the EPA-approved stack sampling methodology, Other Test Method 27. The project plan included sampling seven cotton gins across the Cotton Belt. Key factors for selecting specific cotton gins included: 1) facility location (geographically diverse), 2) industry representative production capacity, 3) typical processing systems,and 4) equipped with properly designed and maintained 1D3D cyclones. Five of the seven gins had 2nd stage mote systems that the exhaust airstreams were not combined with 1st stage mote systems. In terms of capacity, the five gins were typical of the industry, averaging 30.0 bales/hr during testing. Average measured PM2.5 emission factor based on the five tests (11 total test runs) was 0.002 kg/bale (0.005 lb/bale). The project emission factors for PM10 and total particulate were 0.010 kg/bale (0.022 lb/bale) and 0.013 kg/bale (0.029 lb/bale), respectively. The PM2.5 emission rate from test averages ranged from 0.04 to 0.13 kg/hr (0.08 to 0.28 lb/hr). The ratios of PM2.5 to total particulate, PM2.5 to PM10, and PM10 to total particulate were 19.1, 25.0, and 76.6%, respectively.