Treatment of a waste stream through production and utilization of oxyhydrogen gas

• US 7,160,472 B2
• Filed: 11/19/2003
• Issued: 01/09/2007
• Est. Priority Date: 11/19/2002
• Status: Active Grant

• Current Assignee: Xogen Technologies Inc.
• Original Assignee: Xogen Technologies Inc.
• Inventors: Campbell, Herbert Wallace, Chambers, Stephen Barrie, Van Vliet, Dave
• Primary Examiner(s): Prince; Fred G.
• Application Number:
  US10/717,951
• Publication Number:
  US 20040099599A1
• Time in Patent Office: 1,147 Days
• Field of Search: 210/603, 210/605, 210/612, 210/613, 210620-622, 210/630, 210/748, 210/252, 210/259, 210/192, 588/302, 588/303, 588/405, 588/408, 588/409, 204/554, 204/660
• US Class Current: 210/748.17
• CPC Class Codes: C02F 1/24 by flotation C02F1/465 takes precedence
• CPC Class Codes: C02F 1/46 by electrochemical methods
• CPC Class Codes: C02F 1/465 by electroflotation
• CPC Class Codes: C02F 1/4672 by electrooxydation
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 11/06 by oxidation incinerators for burning waste liquors, e.g. sulfite liquor from paper-making plant F23G7/04
• CPC Class Codes: C02F 11/121 by mechanical de-watering
• CPC Class Codes: C02F 2001/46185 only anodic or acidic water, e.g. for oxidizing or sterilizing
• CPC Class Codes: C02F 2103/20 from animal husbandry
• CPC Class Codes: C02F 2103/28 from the paper or cellulose industry
• CPC Class Codes: C02F 2103/36 from the manufacture of organic compounds
• CPC Class Codes: C02F 2201/46125 Electrical variables
• CPC Class Codes: C02F 2201/4617 DC only
• CPC Class Codes: C02F 2201/46175 Electrical pulses
• CPC Class Codes: C02F 2201/782 Ozone generators
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: C02F 2305/04 Surfactants, used as part of a formulation or alone
• CPC Class Codes: C02F 3/00 Biological treatment of water, waste water, or sewage C02F1/006 takes precedence
• CPC Class Codes: C02F 9/00 Multistage treatment of water, waste water or sewage
• CPC Class Codes: Y02E 60/36 Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
• CPC Class Codes: Y02W 10/40 : Valorisation of by-products of wastewater, sewage or sludge processing

Abstract

Methods and systems for treating a waste stream in a waste treatment system involve performing a unit process of the waste treatment system by contacting the waste stream with oxyhydrogen-rich gas generated on-site by an oxyhydrogen gas generator that implements water dissociation technology. In a preferred embodiment, the oxyhydrogen gas generator involves applying a pulsed electrical signal to a series of closely-spaced electrodes that are submerged in the waste stream to produce oxyhydrogen-rich gas from a water component of the waste stream. Operation of the oxyhydrogen gas generator in the waste stream may accomplish one or more unit processes for waste treatment, such as conditioning, stabilization, thickening, and dewatering, among others. At least a portion of the oxyhydrogen-rich gas can be conveyed for a second use in the waste treatment system, such as a source of combustible fuel for incineration or power generation, for example.

Claims

1. A method for treating a waste stream in a waste treatment system, the method comprising the steps of:

operating an oxyhydrogen gas generator within the waste treatment system to produce oxyhydrogen-rich gas by submersing two or more closely spaced electrodes in the waste stream and supplying a pulsed electrical signal to at least one of the electrodes to produce the oxhydrogen-rich gas;

contacting at least a portion of the waste stream with at least a portion of the oxyhydrogen-rich gas to disinfect the waste stream; and

conveying at least a portion of the oxyhydrogen-rich gas for a second use in the waste treatment system.

2. The method of claim 1 wherein the waste stream includes a water component and the operation of the oxyhydrogen gas generator produces oxyhydrogen-rich gas from the water component of the waste stream.

3. The method of claim 1 wherein the waste stream includes a water component, and further comprising:

segregating at least a portion of the water component from the waste stream; and

operating the oxyhydrogen gas generator to produce oxyhydrogen-rich gas from the segregated portion of the water component.

4. The method of claim 1 wherein the oxyhydrogen gas generator is operated to produce oxyhydrogen-rich gas from a water source external to the waste stream.

5. The method of claim 1 wherein the second use includes using the oxyhydrogen-rich gas as a fuel for combustion.

6. The method of claim 5 wherein the combustion produces heat and the produced heat is recovered for use within the waste treatment system.

7. The method of claim 5, wherein the combustion produces an exhaust including water vapor, and further comprising the step of:

condensing the water vapor from the combustion exhaust for use within the waste treatment system.

8. The method of claim 1 wherein the second use includes power generation.

9. The method of claim 1 further comprising the step of separating the oxyhydrogen-rich gas into an oxygen-rich component and a hydrogen-rich component.

10. The method of claim 9 wherein the second use includes converting at least a portion of the oxygen-rich component to ozone for use in disinfecting effluent in the waste treatment system.

11. The method of claim 9 wherein:

the waste treatment system includes an oxygen demand; and

the second use includes using the oxygen-rich component to fulfill at least a portion of the oxygen demand.

12. The method of claim 9 wherein the second use includes using the hydrogen-rich component as a fuel source.

13. The method of claim 1 further comprising the step of conveying at least a portion of the oxyhydrogen-rich gas to an incinerator, wherein the incinerator uses the oxyhydrogen-rich gas as a fuel source to incinerate the waste stream.

14. The method of claim 13 wherein the oxyhydrogen-rich gas fuel source provides sufficient energy to incinerate the waste stream without a separate energy source.

15. The method of claim 13 wherein the oxyhydrogen-rich gas fuel source provides sufficient energy to incinerate the waste stream without substantially reducing water content in the waste stream.

16. The method of claim 1 wherein the oxyhydrogen-rich gas forms bubbles in a water component of the waste stream, the bubbles adhering to solids in the waste stream and rising to a surface where the solids may be removed.

17. A system for treating a waste stream that includes a water component, the system comprising:

an oxyhydrogen-lich gas generator having two or more closely spaced electrodes, the electrodes immersed in the waste stream to create oxyhydrogen-rich gas;

a power supply operatively connected to one or more of the electrodes to provide a pulsed electrical signal;

means for passing at least a portion of the waste stream between the electrodes to contact at least a portion of the oxyhydrogen-rich gas and other oxidizing compounds produced near the electrodes to disinfect the waste stream; and

means for conveying a least a portion of the oxyhydrogen-rich gas to a device in the system,

means for segregating at least a portion of the water component from the waste stream; and

means for operating the oxyhydrogen-rich gas generator to produce oxyhydrogen-rich gas from the segregated portion of the water component,

wherein the other oxidizing compounds include at least hydroxide radicals.

18. The system of claim 17 wherein the waste stream includes a water component.

19. The system of claim 17 further comprising:

a water source external to the waste stream operatively connected to the oxyhydrogen-rich gas generator.

20. The system of claim 17 wherein the device is an incinerator, a power generator or an ozone production unit.

21. The system of claim 17 further comprising:

means for recovering the heat generated by the device for use within the system.

22. The system claim 17 further comprising:

means for condensing water vapor from the combustion of the oxyhydrogen-rich gas for use within the system.

23. The system of claim 17 further comprising:

means for separating the oxyhydrogen-rich gas into an oxygen-rich component and a hydrogen-rich component.

24. The system of claim 23 wherein the hydrogen-rich component is a fuel source for the device.

25. The system of claim 17 further comprising:

an oxygen demand device.

26. The system of claim 17 wherein the oxyhydrogen-rich gas forms bubbles in the water component of the waste stream, the bubbles adhering to solids in the waste stream and rising to a surface where the solids may be removed.