Removal of silica and total organic carbon from wastewater
AssigneeUTI Limited Partnership
InventorsAfif HETHNAWI, Nashaat N. NASSAR
Life of this patent
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Abstract
A filter medium for removal of contaminants from wastewater. The filter medium includes a walnut shell particle having a metal hydro(oxide) nanoparticle bonded to the surface of the nut shell particle. The filter medium is particularly useful for treating produced water and wastewater generated in steam-assisted gravity drainage (SAGD) in recovery of hydrocarbons from oil sands to remove total organic carbon and silica. Processes for preparing the filter medium and for treating wastewater using the filter medium are also provided.
Claims15
A filter medium for removal of contaminants from wastewater, the filter medium comprising:
- a nut shell particle having a metal hydro(oxide) nanoparticle bonded to a surface thereof.
A process for preparing a filter medium for removal of contaminants from wastewater, the process comprising:
- treating a nut shell filter medium with an aqueous acid solution and washing the nut shell filter medium;
- mixing the nut shell filter medium with a source of metal ions, to generate a mixture including an aqueous metal complex and heating the mixture to promote a thermal hydrolysis reaction which generates a metal hydro(oxide) nanoparticle bonded to a surface of the nut shell medium.
A process for treatment of wastewater in a steam-assisted gravity drainage (SAGD) operation, the process comprising filtering the wastewater with the filter medium of claim.
Dependencies are inferred from the claim text.