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ELECTRIFIED BED EVALUATION
Citation:
Piispanen, W., R. Bradway, AND V. Shortell. ELECTRIFIED BED EVALUATION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-78/178.
Description:
The report gives results of an evaluation of a prototype electrified bed (EFB) particulate collection device. The 500 cfm unit, which uses mechanical and electrical mechanisms for collection, was installed at an asphalt roofing plant during the tests. Fractional efficiency was determined with upstream and downstream impactors. Total mass efficiency was determined with glass fiber filter sampling trains. The mean inlet loading was 0.2585 gr/dscf and the mean outlet loading was 0.0037 gr/dscf, for an average efficiency of 98.57 percent. The inlet aerosol has a mass median diameter of about 1 micrometer, with 90 percent less than 2 micrometers. Measurements of volatile hydrocarbons by on-site gas chromatography showed that the inlet concentration of approximately 100 ppm was reduced by 20 to 50 percent by the device.