Portable in-situ ozone-generating remedial system
Methods and systems are presented for treating groundwater in a groundwater well using one or more portable devices including a body having an air inlet port, an ozone/air mixture outlet port, an ozone generator, and a high-voltage power supply, wherein air from the atmosphere is mixed with ozone generated by the ozone generator and the mixture is expelled into the groundwater well. A diffuser and/or diffusion chamber may be provided with some systems.
This application claims the benefit of U.S. Provisional Application No. 60/813,419, filed Jun. 14, 2006, which is hereby incorporated by reference in its entirety.
Provided are certain systems and methods for the treatment of groundwater, and more specifically, to systems and methods for in-situ decontamination of groundwater by infusing contaminated soil with ozone or an ozone/air mixture.
Groundwater treatment systems may employ chemical oxidation and/or aerobic biodegradation to remove contaminants from subterranean water sources. Contaminated soil may be infused with gas to create an environment suitable for chemical oxidation and/or aerobic biodegradation. Current in-situ groundwater treatment systems are typically large-scale systems that require sophisticated technical expertise to install and maintain, a considerable area on the ground surface to be dedicated to system controllers and other equipment, and a traditional alternating current (AC) electrical power connection to be available at the treatment site. Many current systems require digging in order to access contaminated soil and groundwater or for subterranean placement of treatment equipment.
Provided are certain systems and methods for treating groundwater in a groundwater well. In some embodiments, the system includes a body configured to be disposed below ground level in communication with the groundwater to be treated. The body may include at least one air inlet port for admitting air, at least one ozone/air mixture outlet port, at least one ozone generator positioned inside the body for generating ozone, and at least one high-voltage power supply. The body may be configured to mix the air from the atmosphere with the ozone generated by the ozone generator and expel the ozone/air mixture into the groundwater well through the ozone/air mixture outlet port.
In some embodiments, a method of treating groundwater in-situ at a remedial location below ground level in a groundwater well may include installing at the location a body having an ozone generator, a high-voltage power supply operatively connected to the ozone generator, an air inlet for admitting air, and at least one ozone/air mixture outlet. The method may further include supplying power to the high-voltage power supply from an electrical power source, powering the ozone generator using the high-voltage power supply, and generating ozone using the ozone generator. The method may further include flowing air from the air inlet through the system past the ozone generator to create an ozone/air mixture, and channeling the ozone/air mixture into the remedial location.
BRIEF DESCRIPTION OF THE FIGURES
Reference will now be made in detail to one or more exemplary embodiments of the present invention as illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
In some embodiments, air enters an inlet chamber 43 through one or more air inlet ports 3, which may be located in an end cap 26 as depicted in
In some embodiments, air is drawn directly into inlet chamber 43 by air pump 5, as shown in
Ozone generator chamber 45 may house a cold-corona discharge ozone generator 9A or 9B (discussed in detail below and shown in
With continued reference to
System 100 may include a high-voltage electrical power supply 7 for powering ozone generator 9A or 9B. In some embodiments, line cord 2 couples to and powers high-voltage electrical power supply 7. In some embodiments, high-voltage power supply 7 is connected to ozone generator 9A or 9B via high-voltage line cord 8, which may, for example, be made from a stainless steel conductor and have an 8 K volt rating. In some embodiments, high-voltage power supply 7 may be a high-voltage power supply converter such as Yui Da Electrics Co., Ltd. model YD-01S, or similar, and may include resistor 25 connected to the high-voltage power supply to adjust max voltage range and drive frequency. High voltage power supply may include resistor 25 that may be 5 watts and 10 K ohms, to produce max voltage of 7,000 volts AC current. In some embodiments, resistor 25 may be an NTE model #5 W310, or equivalent.
In some embodiments, ozone generator 9A may be configured to include one or more frame members such as cap 30. Cap 30 may be configured to hold dielectric plates 29 in place. In some embodiments, cap 30 may be made of PVC or any non-conducting material. In some embodiments, cap 30 may be slotted to hold dielectric plates 29. In some embodiments, dielectric plates 29 may be secured to cap 30 with type II silicone sealant.
When high voltage current is applied to the cold-corona discharge ozone generator 9A, a corona (electrical discharge) is produced by an electric charge between the parallel electrodes 28. At least some of the oxygen molecules contained within the air passing between electrodes 28 and dielectric plates 29 may be split by the corona into oxygen atoms. Some of the oxygen atoms may recombine again to form molecular oxygen, but some of the oxygen atoms combine to form ozone. The air in ozone generator chamber 45 (discussed above in relation to
In systems 300 and 400, the ozone/air mixture may exit the cold-corona discharge ozone generator 9 and pass through appropriate ducting, such as ozone/air injection tube 10 to a check valve such as check valve 11. The check valve 11 allows the one-way flow of the ozone/air mixture to a diffuser 12, but prevents groundwater from passing through diffuser 12 into the cold-corona discharge ozone generator 9. Check valve 11 can be an ozone-safe duckbill type for above-water use, or any ozone safe pressure valve type for in-water use. Diffuser 12 may be formed of microporous polyethylene, glass-bonded silica, or similar ozone-tolerant porous material.
With reference to
The ozone/air mixture produced by system 300 may be pumped from system 300 into groundwater, or the ozone/air/water mixture may be pumped by water circulation pump 18 into the soil and groundwater surrounding the groundwater well, into remedial zone 22. Contaminants contained in remedial zone 22 that encounter the dissolved ozone/air (ozone/air/water) mixture are broken down into less harmful compounds, remediating the contaminated soil and groundwater. The action of extracting groundwater from groundwater well 15 at the base of the device, and pumping it through water circulation pump 18, creates a circulating zone of groundwater surrounding the groundwater well, further facilitating remediation.
In some embodiments, the groundwater flow direction may be reversed, such that the operation of water pump 18 may cause groundwater to be pumped into the diffusion chamber 46 at the base of the device 300 through outlet port 14. The ozone/air mixture produced by the device, and flowing through diffusion chamber 46, would dissolve into the supplied groundwater, and then pass from the device through groundwater filter 13 into the contaminated soil and groundwater surrounding the groundwater well.
System 200 may be housed within cabinet 34 and coupled to air inlet port 40, through which air may enter system cabinet 34. In some embodiments, system 200 may be deployed in groundwater well 15 below water table 16. In some embodiments, cabinet 34 may be a locking, weather-resistant cabinet supported by support pole 35, which is driven into the ground. In some embodiments, cabinet 34 may include a battery 41 connected to a charge controller 37 (e.g. of 250 watt capacity), timer 38, and compressor 39. In some embodiments, Charge controller 37 may facilitate proper charging of battery 41 by controlling the storage of solar power in battery 41. Timer 38 may be set to control the operating times of system 200. In some embodiments, timer 38 may be configured to pulse remedial action operating times of system 200. In some embodiments, timer 38 may not be present. During operation, compressor 39 may pump air from outside cabinet 34, through air inlet port 40, and into system 200. The electrical components of the embodiment shown in
In some embodiments, compressor 39 may operate between 10.5 and 17.85 LPM and may be of a 12-volt DC piston type similar to Grainger models 5BB70, 5Z349, or 5KA74. In some embodiments, compressor 39 may produce between 9.4 and 16 grams of ozone per day. In some embodiments, battery 41 may be a 12 volt, 110 amp-hour battery.
Air supply tube 21 extends from above ground surface inside well 15, and may connect to packer 42. Diffuser 12 may be coupled to packer 42. The air/ozone mixture created at system 200 may be pumped through air supply tube 21, through packer 42, and out diffuser 12 into groundwater. In some embodiments, packer 42 may be constructed of Viton® or silicone.
Other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. It is intended that the specification and examples be considered as exemplary only, and not an exhaustive list of every combination of features that may comprise the invention described herein.
Claims
1. Apparatus for treating groundwater in a groundwater well, the apparatus being powered from an electrical power source, the apparatus comprising:
- a body configured to be disposed below ground level in communication with the groundwater to be treated, the body including:
- at least one air inlet port for admitting air;
- at least one ozone/air mixture outlet port;
- at least one ozone generator positioned inside the body for generating ozone; and
- at least one high-voltage power supply, connectable to the electrical power source, for powering the at least one ozone generator;
- wherein the body is configured to mix the air from the atmosphere with the ozone generated by the ozone generator and expel the ozone/air mixture into the groundwater well through the ozone/air mixture outlet port.
2. The apparatus as in claim 1, wherein the body includes an ozone generator chamber, the system further comprising an air injection tube interconnected between the air inlet port and the ozone generator chamber, the ozone generator chamber housing the ozone generator.
3. The apparatus as in claim 1, wherein the body is portable.
4. The apparatus as in claim 1, wherein the ozone generator is a rectangular cold-corona discharge ozone generator.
5. The apparatus as in claim 1, wherein the ozone generator is a cylindrical cold-corona discharge ozone generator.
6. The apparatus as in claim 1, further including a resistor operatively connected to the high-voltage power supply to provide max voltage.
7. The apparatus as in claim 1, further comprising a first line cord that electrically connects the electrical power source to the high-voltage power supply.
8. The apparatus as in claim 7, further comprising a second line cord that electrically connects the high-voltage power supply to the ozone generator.
9. The apparatus as in claim 1, further comprising a diffuser for diffusing the ozone/air mixture into the groundwater well.
10. The apparatus as in claim 9, wherein the body further includes a diffusion chamber for housing the diffuser.
11. The apparatus as in claim 10, wherein at least one wall of the diffusion chamber is made of a groundwater filter material.
12. The apparatus as in claim 10, wherein the diffusion chamber is configured to admit groundwater for mixing with the ozone/air mixture, forming an ozone/air/groundwater mixture.
13. The apparatus as in claim 1, wherein the body further includes an air pump for drawing air into the air inlet port.
14. The apparatus as in claim 13, further comprising a first line cord that electrically connects the electrical power source to the air pump.
15. An in-situ groundwater treatment system for treating groundwater in a groundwater well, the system comprising:
- a body having at least: an electrical power source located at or above ground surface; an air inlet port for admitting air; an ozone/air mixture outlet for expelling an ozone/air mixture into the groundwater well; an ozone generator positioned inside the body for generating ozone; and at least one high-voltage power supply for powering the ozone generator, and being operatively connected to the electrical power source;
- wherein the air from the air inlet combines with the ozone generated by the ozone generator and the ozone/air mixture is expelled into the groundwater well through the ozone/air mixture outlet.
16. The system as in claim 15, wherein the body is configured to be disposed below ground level in the groundwater well.
17. The system as in claim 15, further comprising a water circulation pump for circulating groundwater in a remedial area, wherein the water circulation pump is disposed below ground level in communication with the groundwater to be treated.
18. The system as in claim 17, wherein the pump is powered by the electrical power source.
19. The system as in claim 16, further comprising an air line connected to the air inlet for providing air from the atmosphere, and an air injection tube interconnecting the air inlet to an ozone generator chamber, the ozone generator chamber housing the ozone generator.
20. The system as in claim 15, wherein the system is portable.
21. The system as in claim 15, wherein the ozone generator is a rectangular cold-corona discharge ozone generator.
22. The system as in claim 15, wherein the ozone generator is a cylindrical cold-corona discharge ozone generator.
23. The system as in claim 15, further including a resistor connected in parallel with the high-voltage power supply.
24. The system as in claim 15, wherein the body is located above ground surface; and further comprising an ozone/air supply tube for supplying an ozone/air mixture to the groundwater well.
25. The system as in claim 15 wherein the power source is a low-voltage power source and comprises at least one of:
- a direct current (DC) power source;
- a solar cell;
- a solar array;
- a battery;
- an electrical generator; and
- a rectified alternating current (AC) power source.
26. The system as in claim 15, further comprising a first line cord that electrically connects the electrical power source to the high-voltage power supply.
27. The system as in claim 26, further comprising a second line cord that electrically connects the high-voltage power supply to the ozone generator.
28. The system as in claim 15, further comprising a diffuser for diffusing the ozone/air mixture into the groundwater well.
29. The system as in claim 28, wherein the body further includes a diffusion chamber for housing the diffuser.
30. The system as in claim 29, wherein at least one wall of the diffusion chamber is made of a groundwater filter material.
31. The system as in claim 29, wherein the body is configured to admit groundwater into the diffusion chamber for mixing with the ozone/air mixture to form an ozone/air/groundwater mixture.
32. The system as in claim 31, wherein the diffusion chamber includes an ozone/air/groundwater outlet through which the ozone/air/groundwater mixture exits the system and enters the groundwater well.
33. The system as in claim 15, further comprising an air pump for providing air to the groundwater treatment system through the air inlet.
34. The system as in claim 33, wherein the air pump is disposed within the body, and wherein the system further comprises a first line cord that electrically connects the electrical power source to the air pump.
35. The system as in claim 15, wherein the body is housed in a cabinet above ground surface.
36. The system as in claim 35 wherein the cabinet further houses an air compressor coupled to the air inlet of the body.
37. The system as in claim 35, wherein the cabinet further houses a timer for controlling the operating times of the system.
38. The system as in claim 35, further comprising a charge controller and a battery, wherein the charge controller manages the storage of energy in the battery and the battery is coupled to the electrical power source.
39. A method of treating groundwater in-situ at a remedial location below ground level in a groundwater well, the method comprising:
- installing at the location a body having an ozone generator, a high-voltage power supply operatively connected to the ozone generator, an air inlet for admitting air, and at least one ozone/air mixture outlet;
- supplying power to the high-voltage power supply from an electrical power source;
- powering the ozone generator using the high-voltage power supply;
- generating ozone using the ozone generator;
- flowing air from the air inlet through the system past the ozone generator to create an ozone/air mixture; and
- channeling the ozone/air mixture into the remedial location.
40. The method as in claim 39, further comprising circulating water in the remedial location using a water circulation pump.
41. The method as in claim 39, wherein supplying power includes locating an electrical power source above ground surface and electrically connecting the electrical power source to the high-voltage power supply via a first line cord.
42. The method as in claim 41, wherein powering the ozone generator includes electrically connecting the ozone generator to the high-voltage power supply via a second line cord.
43. The method as in claim 39, further comprising diffusing the ozone/air mixture into the groundwater well.
44. The method as in claim 39, further comprising mixing groundwater with the ozone/air mixture, forming an ozone/air/groundwater mixture.
45. The method as in claim 44, further comprising expelling the ozone/air/groundwater mixture from the system into the groundwater well through a ozone/air/groundwater mixture outlet port.
46. The method as in claim 39, further comprising pumping air through the body including past the ozone generator.
Type: Application
Filed: Jun 13, 2007
Publication Date: Feb 28, 2008
Inventor: David Herzog (Orangevale, CA)
Application Number: 11/818,511
International Classification: C02F 1/78 (20060101);