Treatment of gas well hydrofracture wastewaters
AssigneeProChemTech International, Inc.
InventorTimothy Edward Keister
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Abstract
Discharge water from a coal mine, and/or water from an abandoned coal mine, is used as a source of sulfate ions to precipitate barium from gas well hydrofracture wastewater. A liquid comprising a gas well hydrofracture wastewater comprising barium is mixed with a coal mine water comprising sulfate ions. The amount of coal mine water in the liquid is sufficient to provide enough sulfate ions to precipitate at least 90% of the barium in the gas well hydrofracture wastewater. The ratio of gas well hydrofracture wastewater to coal mine water can be from 1:10 to 1:1.
Claims18
A liquid comprising a gas well hydrofracture wastewater comprising barium, and an amount of coal mine water comprising sulfate ions, the coal mine water being selected from abandoned coal mine water and coal mine discharge water, wherein the amount of coal mine water in the liquid is sufficient to provide enough sulfate ions to precipitate at least 90% of the barium in the gas well hydrofracture wastewater.
A method comprising:
- mixing together gas well hydrofracture wastewater comprising barium, and an amount of coal mine water comprising sulfate ions, the coal mine water being selected from abandoned coal mine water and coal mine discharge water, wherein the amount of coal mine water mixed with the gas well hydrofracture wastewater is an amount sufficient to provide enough sulfate ions to precipitate at least 90% of the barium present in the gas well hydrofracture wastewater.
The method of 17, wherein the filtering comprises filtering on an inclined plate clarifier.
Dependencies are inferred from the claim text.