The report gives results of fractional and overall mass efficiency tests of the Aronetics two-phase jet scrubber. The tests were performed on a full scale scrubber used for controlling particulate emissions from a ferroalloy electric arc furnace. Total flue gas particulate mass concentrations were determined at the inlet and outlet of the scrubber by conventional (Method 5) techniques. Inlet and outlet particulate concentrations as functions of size were determined on a mass basis using cascade impactors for sizes of about 0.3-5 micrometers, and on a number basis for sizes smaller than about 1 micrometer using optical and diffusional methods. The report includes brief descriptions of the ferroalloy furnace process, the Aronetics scrubber, economics of operating the scrubber, measurement methods for determining fractional efficiency, a time history of the furnace particulate emissions, and measured fractional efficiencies.

"EPA/650-2-74-129." "December 1974."