Membrane Treatment of Aqueous Film Forming Foam (AFFF) Wastes for Recovery of Its Active Ingredients
Final rept. Mar 1979-Sep 1980
GEORGIA INST OF TECH ATLANTA
Pagination or Media Count:
Ultrafiltration UF and Reverse Osmosis RO treatment of Aqueous Film Forming Foam AFFF solutions was investigated to determine the feasibility of employing membrane processes to separate and recover AFFF active ingredients for reuse. Studies were performed on both 6 AFFF in tap-water solutions and on actual wastewaters spiked with 3 or 6 AFFF. The AFFF materials used in this study consisted of Ansul, 3M FC-206, and 3M FC-780. Membrane employed for these studies included Abcor HFD, HFF, HFJ, and HFK tubular ultrafiltration UF membranes and a DuPont B-10 reverse osmosis RO module. Parameters monitored to represent AFFF ingredients were TOC, dissolved solids, surfactants, and glycol. An attempt was also made to determine fluorocarbons as fluoride. Membrane fluxes were also determined. Results of this study demonstrate the feasibility of employing UF-RO processes to separate and recover the AFFF active ingredients for reuse. Approximately 75 recovery of the AFFF active ingredients as represented by the foam test was attained. An economic analysis of the membrane treatment processes indicates that it is extremely favorable in recovering the AFFF wastewater for reuse. Pilot-scale studies are, however, necessary to fully establish the process feasibilities and economics of the AFFF recovery system.
- Water Pollution and Control