US 12,410,071 B1
System and method for removal of PFAS and other emerging contaminant micro-constituents from landfill leachate and other impacted liquids
Brian Brazil, Damascus, MD (US); and Rohan Menon, Chester Springs, PA (US)
Assigned to WM INTELLECTUAL PROPERTY HOLDINGS, L.L.C., Houston, TX (US)
Filed by WM INTELLECTUAL PROPERTY HOLDINGS, L.L.C., Houston, TX (US)
Filed on Oct. 19, 2021, as Appl. No. 17/505,516.
Claims priority of provisional application 63/093,421, filed on Oct. 19, 2020.
Int. Cl. C02F 9/00 (2023.01); B01D 53/02 (2006.01); C02F 1/28 (2023.01); C02F 1/42 (2023.01); C02F 1/44 (2023.01); C02F 1/58 (2023.01); C02F 101/36 (2006.01); C02F 103/06 (2006.01)
CPC C02F 1/281 (2013.01) [B01D 53/02 (2013.01); C02F 1/58 (2013.01); B01D 2253/11 (2013.01); C02F 2101/36 (2013.01); C02F 2103/06 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of removing per- and poly-fluoroalkyl substances (PFAS) from a leachate stream, the method comprising:
introducing the leachate stream comprising per- and poly-fluoroalkyl substances into a primary treatment module, wherein the primary treatment module comprises a solids removal vessel that is configured to remove solids from the leachate stream using membrane filtration and produce an effluent stream; and
passing the effluent stream directly from the solids removal vessel into a secondary treatment module comprising an adsorptive organic/clay based material and configured to adsorb microconstituents from the effluent stream,
wherein there is no removal of total organic carbon (TOC) in a TOC removal vessel prior to adsorption occurring in the secondary treatment module,
and wherein the secondary treatment module produces a treated leachate stream that is substantially devoid of per- and poly-fluoroalkyl substances.