Salt separation and destruction of PFAS utilizing reverse osmosis and salt separation
AssigneeRevive Environmental Technology, LLC
InventorsStephen H. Rosansky, Michael Miller, Patrick Norris, Darwin Argumedo, Douglas Hendry, Ian Haggerty, Keith Brown, Joshua James, Joseph Casciano, Slawomir Winecki, Vivek Lal, Tom McGuinness
Life of this patent
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Abstract
Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.
Claims16
A method of treating the effluent from a method of destroying PFAS in a SCWO reactor, comprising:
- passing an oxidant, PFAS, and water through a SCWO reactor to produce an effluent comprising aqueous HF, and treating the effluent by:
- passing at least a portion of the effluent comprising aqueous HF into a mixing pipe where, the effluent is mixed with cooling water that optionally contains hydroxy salts;
- wherein the effluent comprises a vapor stream comprising carbon dioxide and, optionally, oxygen gas and separating the vapor stream from a liquid stream.
A method of treating the effluent from a method of destroying PFAS in a SCWO reactor, comprising:
- passing an oxidant, PFAS, and water through a SCWO reactor to produce an effluent,
- wherein the effluent comprises a vapor stream comprising carbon dioxide and, optionally, oxygen gas and separating the vapor stream from a liquid stream;
- and
- treating the effluent by removing solids from the effluent by spray drying.
A method of treating the effluent from a method of destroying PFAS in a SCWO reactor, comprising:
- passing an oxidant, PFAS, and water through a SCWO reactor to produce an effluent,
- wherein the effluent comprises a vapor stream comprising carbon dioxide and, optionally, oxygen gas and separating the vapor stream from a liquid stream;
- and
- treating the effluent by spraying the effluent into a stream of hot air.
Dependencies are inferred from the claim text.