WO1998052873A2 - In-well air stripping, oxidation, and adsorption - Google Patents
In-well air stripping, oxidation, and adsorption Download PDFInfo
- Publication number
- WO1998052873A2 WO1998052873A2 PCT/US1998/010453 US9810453W WO9852873A2 WO 1998052873 A2 WO1998052873 A2 WO 1998052873A2 US 9810453 W US9810453 W US 9810453W WO 9852873 A2 WO9852873 A2 WO 9852873A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- well
- groundwater
- conduit
- tube
- gas
- Prior art date
Links
- 230000003647 oxidation Effects 0.000 title claims abstract description 14
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003673 groundwater Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000356 contaminant Substances 0.000 claims abstract description 19
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000012856 packing Methods 0.000 claims abstract description 11
- 238000012546 transfer Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 5
- 241000529895 Stercorarius Species 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 28
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005067 remediation Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 101150051027 celf2 gene Proteins 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013520 petroleum-based product Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/005—Extraction of vapours or gases using vacuum or venting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Definitions
- the present invention relates generally to a method and apparatus for removing
- NOC pollutants are petroleum based products and chlorinated solvents. Frequently, as a result of spills, leakage from storage facilities or surface discharges, contaminants percolate into groundwater, thereby posing a
- groundwater is not as susceptible to pollution as surface water, once polluted.
- VOCs are transferred from the contaminated water to the gas bubbles which can then
- the present invention involves new concepts for in-well removal of contaminants from
- the present invention combines packing/stripping materials (balls) with air stripping techniques in the well.
- oxidation and adsorption techniques can also be incorporated to compliment the air
- the injected gas may be air or any specific or combination of gases such as nitrogen gas.
- the injected gas can be at any
- Objects of the invention are accomplished by injecting a gas into the lower extent of a well to force groundwater up the well through air lifting, causing NOCs to be transferred to rising gas bubbles inside the well.
- the available surface area for contaminant mass transfer within the flow of the mixture of groundwater and gas bubbles is
- packing balls preferably jaeger tripack packing material
- ozone can be mixed with the injected gas
- the air be supplied to the lower extent of the well by operating an
- the system for removing NOCs from contaminated groundwater is comprised of a means for supplying gas and ozone to the lower extent of a well which induces a flow of
- the system contains a conduit within the well, which extends below the water table
- the conduit has a lower fluid-permeable section which is
- the present invention is further comprised of an internal pipe or eductor tube contained
- Packing materials are located between the eductor tube and the means for supplying gas to the
- invention also contains a means, which is located near the top of the conduit, for separating the gas bubbles from the groundwater.
- the system of the present invention contain a gas supplying means
- an ozone generator to provide the right amount of ozone.
- system of the present invention contain a bentonite seal
- the system of the present invention contain a means for capturing the gas bubbles which have been separated from the groundwater.
- Figure 1 is a cross-sectional view of a preferred embodiment of the present invention.
- the present invention removes NOCs from contaminated
- groundwater by supplying a gas such as air and ozone mixture into a well 18.
- a gas such as air and ozone mixture
- groundwater is lifted upward through the well creating a
- the treated water which is now free of a portion of VOCs, flows out of the conduit 16 to mix with the groundwater.
- FIG. 1 illustrates one embodiment of the present invention.
- a borehole 12 is
- the external conduit 16 is positioned within the borehole 12.
- the fluid-permeable sections may be comprised of screened PNC pipe or another suitable material.
- conduit 16 may be comprised of impermeable material such as PNC
- An internal pipe 30, or eductor pipe, is placed between the air tube 26 and the external pipe 16. The air being pumped into the well is contained in the eductor pipe.
- the eductor pipe is an internal pipe 30, or eductor pipe.
- pipe 30 may also be closed at the lower end. If the eductor pipe is closed at the lower end, slots placed at the lower end can allow water to flow into the pipe while preventing air bubbles from escaping.
- a compressed air tube 26 is positioned within the conduit 16 and extends substantially
- the tube 26 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air pump 29 and an ozone generator at the top of the conduit.
- an air pump 29 may be open at the base at 26 and attached to an air
- Groundwater may flow through the phreatic zone 14 as illustrated by the solid line arrows 38. Alternatively, the groundwater may not flow through the phreatic zone.
- the present invention operates ⁇ ffectively in either case.
- An air pump is operated to force air into the air tube 26 down to the base of the conduit 16 at 28.
- a gas such as carbon monoxide, can also be used as appropriate.
- conduit 28 creating air bubbles and introducing ozone molecules. Subsequently, water flows
- the water/air mixture rises up in the space, or "mixing zone" 40, between the air tube 26 and the eductor tube 30. As the air rises, it mixes with the water within the eductor tube and creates water
- NOCs are the water/air mixture flowing up the eductor pipe.
- the air strips the water of volatile contaminants in the mixing zone 40 in addition to direct oxidation.
- the a /contaminant gas mixture is then separated from the water/air mixture near the top of the
- the gas mixture is then released above the water table into the atmosphere.
- the air/contaminant gas mixture may be
- the NOC vapor can be extracted from the gas mixture using vacuum vapor extraction techniques also to enhance the stripping efficiencies of
- NOCs are transferred from the water to the gas phase in addition to oxidation of compounds. However, frequently this process does not result in complete mass transfer of the contaminants. Mass removal occurs when the rising bubbles become saturated with NOC
- packing materials may be used to achieve a similar result to the preferred tripack balls.
- Adsorption media 50 may be placed in a trench 52 or annular holes near the top of the
- adsorption media 50 that resides in the trench 52.
- An example of an adsorption media is activated carbon or ion exchange material.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU75890/98A AU7589098A (en) | 1997-05-19 | 1998-05-19 | In-well air stripping, oxidation, and adsorption |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/858,267 | 1997-05-19 | ||
US08/858,267 US6007274A (en) | 1997-05-19 | 1997-05-19 | In-well air stripping, oxidation, and adsorption |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998052873A2 true WO1998052873A2 (en) | 1998-11-26 |
Family
ID=25327912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/010453 WO1998052873A2 (en) | 1997-05-19 | 1998-05-19 | In-well air stripping, oxidation, and adsorption |
Country Status (3)
Country | Link |
---|---|
US (5) | US6007274A (en) |
AU (1) | AU7589098A (en) |
WO (1) | WO1998052873A2 (en) |
Cited By (1)
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WO2003067026A1 (en) * | 2002-02-06 | 2003-08-14 | Santos Ltd | Gas well packing system |
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-
1998
- 1998-05-19 AU AU75890/98A patent/AU7589098A/en not_active Abandoned
- 1998-05-19 WO PCT/US1998/010453 patent/WO1998052873A2/en unknown
- 1998-08-26 US US09/140,244 patent/US6174108B1/en not_active Expired - Lifetime
-
1999
- 1999-05-18 US US09/313,678 patent/US6102623A/en not_active Expired - Lifetime
-
2000
- 2000-05-08 US US09/566,508 patent/US6254310B1/en not_active Expired - Fee Related
- 2000-05-08 US US09/566,513 patent/US6283674B1/en not_active Expired - Fee Related
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2003067026A1 (en) * | 2002-02-06 | 2003-08-14 | Santos Ltd | Gas well packing system |
Also Published As
Publication number | Publication date |
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US6174108B1 (en) | 2001-01-16 |
US6007274A (en) | 1999-12-28 |
US6102623A (en) | 2000-08-15 |
AU7589098A (en) | 1998-12-11 |
US6283674B1 (en) | 2001-09-04 |
US6254310B1 (en) | 2001-07-03 |
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