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US 10,947,132 B2Granted
System and methods for removing dissolved metals from wastewater streams
AssigneeCarbonxt, Inc.
InventorsDavid W. Mazyek, Heather McKenna, Christine O. Valcarce
Life of this patent
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Abstract
A photocatalytic reaction unit for removing dissolved metals from a wastewater stream, including a photocatalytic reaction vessel having an inlet and an outlet for providing passage of the wastewater stream into and out of the photocatalytic reaction vessel; a photocatalyst for mixing with the wastewater stream; and an ultraviolet light source for emitting ultraviolet light into the photocatalytic reaction vessel.
Claims14
A photocatalytic reaction unit for removing dissolved metals from a wastewater stream, comprising:
- a photocatalytic reaction vessel having an inlet and an outlet for providing passage of the wastewater stream into and out of the photocatalytic reaction vessel;
- a photocatalyst in contact with the wastewater stream including selenium and mercury;
- an ultraviolet light source for emitting ultraviolet light into the photocatalytic reaction vessel;
- and
- a pretreatment unit disposed upstream of and in fluid communication with the photocatalytic reaction unit for pretreatment of said selenium and mercury, the pretreatment unit providing one or more pretreatments selected from the group consisting of hydrogen peroxide/ultraviolet light treatment, ozonation, photo-Fenton treatment, ultraviolet light treatment, treatment by a slurry of photocatalyst irradiated with ultraviolet light, wherein a photocatalytic reaction occurs for said dissolved metals consisting essentially of selenium and mercury.
2 more elements
A system for removing dissolved metals from a wastewater stream, comprising:
- a photocatalytic reaction vessel having an inlet and an outlet for providing passage of the wastewater stream into and out of the photocatalytic reaction vessel, said wastewater stream including selenium and mercury;
- a photocatalyst;
- an ultraviolet light source for emitting ultraviolet light into the photocatalytic reaction vessel;
- and
- a photocatalyst regeneration unit disposed downstream from said photocatalytic reaction vessel for regenerating the photocatalyst, the regeneration unit selected from the group consisting of changing a pH of a slurry carrying said photocatalyst, thermal regeneration, photocatalytic oxidation, or combination thereof, wherein a photocatalytic reaction occurs for said dissolved metals consisting essentially of selenium and mercury.
2 more elements
Dependencies are inferred from the claim text.