System and method for removal of PFAS and other emerging contaminant micro-constituents from landfill leachate and other impacted liquids
AssigneeWm Intellectual Property Holdings, L.L.C.
InventorsBrian Brazil, Rohan Menon
Life of this patent
Estimating the term…
Abstract
A system and method for removing PFAS from residual waste streams generated during the processing of landfill liquids prior to disposal are provided. An example of a landfill liquid is leachate. Landfill leachate can contain dissolved or entrained environmentally harmful substances such as PFAS and other emerging contaminant micro-constituents that may enter the environment if not properly treated. The presently disclosed system and method can improve the removal of PFAS and other emerging contaminant micro-constituents in landfill leachate and/or landfill impacted liquids including stormwater and contaminated groundwater.
Claims12
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.
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 consisting essentially of a solids removal vessel that is configured to remove solids from the leachate stream using membrane filtration and produce an effluent stream;
- and
- introducing the effluent stream directly into a secondary treatment module comprising an adsorptive organic/clay based material and configured to adsorb microconstituents from the effluent stream,
- wherein the secondary treatment module produces a treated leachate stream that is substantially devoid of per- and poly-fluoroalkyl substances.
A method of removing per- and poly-fluoroalkyl substances (PFAS) from a leachate stream, the method comprising:
- storing leachate comprising per- and poly-fluoroalkyl substances in a storage vessel;
- introducing leachate from the storage vessel directly into a primary treatment module using the leachate stream, wherein the primary treatment module consists essentially of 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 primary treatment module into a secondary treatment module comprising an adsorptive organic/clay based material and configured to adsorb microconstituents from the effluent stream,
- wherein the secondary treatment module produces a treated leachate stream that is substantially devoid of per- and poly-fluoroalkyl substances.
A method of removing per- and poly-fluoroalkyl substances (PFAS) from a leachate stream, the method comprising:
- storing leachate comprising per- and poly-fluoroalkyl substances in a storage vessel;
- introducing leachate from the storage vessel directly into a solids removal vessel using the leachate stream, wherein the solids removal vessel is configured to remove solids from the leachate stream using membrane filtration to produce an effluent stream;
- and
- passing the effluent stream directly from the solids removal vessel into an adsorption treatment vessel configured to adsorb microconstituents from the effluent stream using an adsorptive organic/clay based material,
- wherein the adsorption treatment vessel produces a treated leachate stream that is substantially devoid of per- and poly-fluoroalkyl substances.
Dependencies are inferred from the claim text.