Methods of treating water to remove contaminants and water treatment plants for the practice thereof
AssigneeReticle, Inc.
InventorCarl C. Nesbitt
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to methods of treating water to remove contaminants, including harmful metal ions, and water treatment plants for practicing such methods. In an embodiment, the process includes adding a sulfur-containing, metal-decreasing agent; an iron (III)-containing, metalloid-decreasing agent; forming a solid precipitate from the contaminated water, wherein the solid precipitate includes a solid metal sulfide, a solid iron metalloid, a solid calcium metalloid, or a combination thereof; and separating the contaminated water from the solid precipitate to form purified water.
Claims26
A process for treating contaminated water comprising:
- adding at least one sulfur-containing, metal-decreasing agent to the contaminated water;
- adding at least one iron (III)-containing, metalloid-decreasing agent or at least one calcium-containing, metalloid-decreasing agent to the contaminated water;
- forming a solid precipitate from the contaminated water, wherein the solid precipitate includes a solid metal sulfide, a solid iron metalloid, a solid calcium metalloid, or a combination thereof;
- and
- separating the contaminated water from the solid precipitate to form purified water.
A process for treating contaminated water comprising:
- adding one or both of at least one sulfur-containing, metal-decreasing agent or at least one iron (III)-containing, metalloid-decreasing agent to the contaminated water;
- forming a solid precipitate, wherein the solid precipitate includes a solid metal sulfide, a solid iron metalloid, or a combination thereof;
- and
- removing the contaminated water from the solid precipitate to form purified water, wherein the purified water contains a fertilizer.
A process for treating contaminated or ion-containing water comprising:
- adding at least one sulfur-containing, metal-decreasing agent, at least one iron (III)-containing, metalloid-decreasing agent, a hardness decreasing agent, at least one sulfate reducing agent, and adding a sulfate decreasing agent, or a combination thereof, simultaneously or in any order,
- removing ion-contaminants identified or quantified from the contaminated water.
The process claim of 20, further comprising:
- adding at least one sulfur-containing, metal-decreasing agent or at least one iron (III)-containing, metalloid-decreasing agent into one, two or more tanks individually, in sequence, or in a combination.
The process claim of 21, further comprising:
- transferring fluid from tank to tank, filtering after each tank.
The process claim of 23, further comprising:
- removing of a solid precipitate before, after, or during any reagent addition steps by filtering or settling.
Dependencies are inferred from the claim text.