Use of hollow fiber filtration in conjunction with precipitant technologies to reclaim water from complex aqueous waste streams
AssigneeGarratt-Callahan Company
InventorsE. H. Kelle Zeiher, Henri Robert Asbell, James E Gamlen, Daron Gareth Evans
Life of this patent
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Abstract
A method of treating aqueous, preferably concentrated, waste streams with a unique combination of steps in a way that is easily scalable and able to be used with batch or continuous flows. The method comprises at least the following steps: Adding at least one precipitating agent to the waste water to produce precipitated solids; and removing the precipitated solids from the waste water using a forward flushable membrane to remove the precipitate solids.
Claims18
A method to reclaim water from a waste water with dissolved solids comprising the following steps:
- Adding at least one precipitating agent to the waste water to produce precipitated solids;
- and removing the precipitated solids from the waste water using a hollow fiber membrane to remove the precipitated solids,
- wherein the step of:
- Adding at least one precipitating agent to the waste water to produce precipitated solids, includes the at least one precipitating agent having a range of 0.005×10−3 to 0.10×10−3 (milliequivalents/Liter/ppm hardness) selected to produce precipitated lime solid.
A method to reclaim water from a waste water with dissolved solids comprising the following steps:
- Adding at least one precipitating agent to the waste water to produce precipitated solids;
- and removing the precipitated solids from the waste water using a hollow fiber membrane to remove the precipitated solids,
- Adding at least one precipitating agent to the waste water to produce precipitated solids, includes the at least one precipitating agent having a range of 0.0025×10−3 to 0.037×10−3 (milliequivalents/Liter/ppm hardness) selected to produce precipitated soda ash solid.
A method to reclaim water from a waste water with dissolved solids comprising the following steps:
- Adding at least one precipitating agent to the waste water to produce precipitated solids;
- and removing the precipitated solids from the waste water using a hollow fiber membrane to remove the precipitate solids,
- wherein the step of:
- Adding at least one precipitating agent to the waste water to produce precipitated solids, includes the at least one precipitating agent selected to produce precipitated solids from the group consisting of lime solid, soda ash solid and combinations thereof.
Dependencies are inferred from the claim text.