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Abstract
The problems associated with the design and operation of appropriate air pollution control equipment for particulate emissions from dryer-drum hot asphalt plants are discussed by outlining the basic process involved, the quantities of particulate matter being emitted, and possible methods of control. The most difficult problem seems to be the emission of a fine aerosol of unburned hydrocarbons generated as a result of the simultaneous heating and mixing of the asphaltic material. From the information presented, it was concluded that in most circumstances the venturi scrubber would be the most viable alternative to meet the 0.04 gr/dscf limitation imposed by the New Source Performance Standards promulgated by the EPA.