Systems and methods for removing hydrogen peroxide from water purification systems

• US 9,145,318 B2
• Filed: 05/18/2011
• Issued: 09/29/2015
• Est. Priority Date: 05/24/2010
• Status: Active Grant

• Current Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Original Assignee: Baxter Healthcare SA (Baxter International Inc.), Baxter International Inc.
• Inventors: Rohde, Justin B.
• Primary Examiner(s): Mellon, David C
• Assistant Examiner(s): PATEL, PRANAV N
• Application Number:
  US13/110,496
• Publication Number:
  US 20110284377A1
• Time in Patent Office: 1,595 Days
• Field of Search: 210/627, 210/631, 210/638, 210/660, 210/673, 210/757, 210/758, 210/759, 210/542, 210/198.1, 204/524, 204/527, 204/533, 204/536, 204/540, 204/632
• US Class Current: 1/1
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1672 using membrane filters, e.g. for sterilising the dialysate
• CPC Class Codes: A61M 1/1674 using UV radiation sources for sterilising the dialysate
• CPC Class Codes: B01D 2311/08 Specific process operations in the concentrate stream
• CPC Class Codes: B01D 2311/2696 Catalytic reactions
• CPC Class Codes: B01D 61/48 having one or more compartments filled with ion-exchange material , e.g. electrodeionisation
• CPC Class Codes: B01D 61/52 Accessories; Auxiliary operation
• CPC Class Codes: B01J 23/02 of the alkali- or alkaline earth metals or beryllium
• CPC Class Codes: B01J 23/06 of zinc, cadmium or mercury
• CPC Class Codes: B01J 23/34 Manganese
• CPC Class Codes: B01J 23/72 Copper
• CPC Class Codes: B01J 23/745 Iron
• CPC Class Codes: C02F 1/4695 electrodeionisation
• CPC Class Codes: C02F 2103/04 for obtaining ultra-pure water
• CPC Class Codes: C02F 2201/4618 Supplying or removing reactants or electrolyte
• CPC Class Codes: C02F 2303/18 Removal of treatment agents after treatment
• CPC Class Codes: C02F 9/00 Multistage treatment of water, waste water or sewage

Abstract

Systems and methods for removing hydrogen peroxide from water purification systems are provided. In a general embodiment, the present disclosure provides a water purification system including a water treatment unit, an electrodeionization unit and a hydrogen peroxide decomposition catalyst in fluid connection with the electrodeionization unit. The water purification system can be fluidly connected to a renal treatment system.

Claims

1. A water purification system comprising:

a water treatment unit;

an electrodeionization unit positioned and arranged to receive a pre-treated water stream from the water treatment unit and produce a rejected water stream and a purified water stream; and

a hydrogen peroxide decomposition catalyst positioned and arranged to receive the rejected water stream produced by the electrodeionization unit,

wherein the water treatment unit is positioned and arranged to receive the rejected water stream produced by the electrodeionization unit after the rejected water stream passes through the hydrogen peroxide decomposition catalyst.

2. The water purification system of claim 1, wherein the hydrogen peroxide decomposition catalyst comprises Manganese Dioxide.

3. The water purification system of claim 1, wherein the hydrogen peroxide decomposition catalyst is selected from the group consisting of Silver, Catalase, Peroxidase, Potassium Iodide, Copper (II) Oxide, Zinc Oxide, Fe(2+), Ti(3+) and combinations thereof.

4. The water purification system of claim 1 further comprising a dialyzer in fluid connection with the electrodeionization unit.

5. A renal treatment system comprising:

a water treatment unit;

an electrodeionization unit positioned and arranged to receive a pre-treated water stream from the water treatment unit and produce a rejected water stream and a purified water stream;

a hydrogen peroxide decomposition catalyst positioned downstream of the electrodeionization unit to receive the rejected water stream produced by the electrodeionization unit; and

a dialyzer in fluid connection with the electrodeionization unit,

wherein the water treatment unit is positioned and arranged to receive the rejected water stream produced by the electrodeionization unit after the rejected water stream passes through the hydrogen peroxide decomposition catalyst.

6. The renal treatment system of claim 5, wherein the water treatment unit comprises a component selected from the group consisting of an activated carbon unit, a sediment filter, a softening unit, a sorbent, an ultra-violet unit, a membrane filter, a distilling unit, a deionization unit and combinations thereof.

7. The renal treatment system of claim 5, wherein the hydrogen peroxide decomposition catalyst comprises Manganese Dioxide.

8. The renal treatment system of claim 5, wherein the hydrogen peroxide decomposition catalyst is selected from the group consisting of Silver, Catalase, Peroxidase, Potassium Iodide, Copper (II) Oxide, Zinc Oxide, Fe(2+), Ti(3+) and combinations thereof.

9. A home hemodialysis system comprising:

a water treatment unit;

an electrodeionization unit positioned and arranged to receive a pre-treated water stream from the water treatment unit and produce a rejected water stream and a purified water stream;

a hydrogen peroxide decomposition catalyst positioned downstream of the electrodeionization unit to receive the rejected water stream produced by the electrodeionization unit; and

a dialyzer in fluid connection with the electrodeionization unit,

wherein the water treatment unit is positioned and arranged to receive the rejected water stream produced by the electrodeionization unit after the rejected water stream passes through the hydrogen peroxide decomposition catalyst.

10. A method of performing dialysis, the method comprising:

passing water through a water treatment unit;

passing the water through an electrodeionization unit positioned downstream of the water treatment unit, the electrodeionization unit producing a rejected water stream and a purified water stream;

passing the purified water stream to a dialysis treatment system;

recirculating the rejected water stream through a hydrogen peroxide decomposition catalyst and back to the water treatment unit.

11. The method of claim 10 further comprising passing the purified water stream to a renal treatment system selected from the group consisting of hemodialysis, hemofiltration, hemodiafiltration, automated peritoneal dialysis, continuous ambulatory peritoneal dialysis and continuous flow peritoneal dialysis.

12. The method of claim 10, wherein the water treatment unit comprises a component selected from the group consisting of an activated carbon unit, a sediment filter, a softening unit, a sorbent, an ultra-violet unit, a membrane filter, a distilling unit, a deionization unit and combinations thereof.

13. A method of preventing the formation of bacterial contamination in a water purification system during dialysis, the method comprising:

passing water through a circuit of a water treatment unit including an electrodeionization unit, the electrodeionization unit producing a rejected fluid stream and a purified fluid stream;

adding hydrogen peroxide to the rejected fluid stream of the water treatment unit;

circulating the rejected fluid stream through a hydrogen peroxide decomposition catalyst after adding the hydrogen peroxide;

passing the purified fluid stream to a renal treatment system; and

circulating the rejected fluid stream produced by the electrodeionization unit back to the water treatment unit after circulating the rejected fluid stream through the hydrogen peroxide decomposition catalyst.