PFAS-Free Alternatives to AFFF

Aqueous film forming foam (AFFF) is a water based foam that was historically comprised of per- and polyfluoroalkyl substance (PFAS)-based surfactants. AFFF has been used by the military since the 1970s for fire suppression in ships, shore fixed systems, aircraft hangars and to extinguish liquid fuel fires in aircraft rescue and fire fighting (ARFF) vehicles. In FY20, Congress mandated that PFAS be eliminated from AFFF by FY25. In this technical session, presentations provided details on the performance of PFAS-free alternatives including research on recently-developed novel surfactants at the laboratory scale as well as commercially available products demonstrated against representative large scale fires. This session also included updates on revisions to MIL-PRF-24385 to enable implementation of PFAS-free foams, as well as highlights from the 2021 SERDP AFFF Challenge featuring innovative approaches to fuel fire extinguishment from around the country.

Session Chair: Ms. Andrea Cameron, U.S. Naval War College
Session Introduction Mr. Noah Lieb, Jensen Hughes
AFFF Replacement Overview Mr. Keith Welch, Noblis
What are the Actual Firefighting Capabilities of Best Commercially Available PFAS-Free Foams in DoD Applications Mr. Jerry Back, Jensen Hughes
Demonstration of Selected Approaches for Enhancing Performance of PFAS-Free Foams Dr. Satya Chauhan, Battelle
CO2 Concentration Measurements Above a Pool Fire Suppressed with Firefighting Foam Dr. Katie Hinnant, Naval Research Laboratory
Fluorine Free Formulations to Replace AFFF – Lessons Learned Dr. Kris Rangan, MMI
Testing of New Fluorine-Free Green Surfactant Mixtures to Replace AFFF Dr. Kevin Roth, ADA

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