Read the full story from the Minnesota Pollution Control Agency.
The Minnesota Pollution Control Agency (MPCA) today announced the purchase of new, state-of-the art technology to remove and destroy bulk concentrations of per- and polyfluoroalkyl substances (PFAS) from contaminated water in the environment. This fall, the state will deploy the technology in the East Metro as part of the ongoing work to address PFAS contamination affecting the drinking water for roughly 174,000 residents. The system is paid for with funds from the 3M settlement.
The process works in two parts. The first technology, surface activated foam fractionation (SAFF), injects outdoor air into contaminated water, turning PFAS into foam that can be separated from the water. The foam is then removed, PFAS levels are significantly reduced, and the water is returned to the environment — both cleaner and safer. The PFAS concentrate then goes to the DEFLUORO unit, a second technology where the carbon-fluorine bonds (the backbone of PFAS chemicals) are broken through electrochemical oxidation. Both technologies are mobile and work without adding any chemicals back into the surface or groundwater.