CA2193643A1 - Method and apparatus for photocatalytic oxidation of water-borne chemical species - Google Patents
Method and apparatus for photocatalytic oxidation of water-borne chemical speciesInfo
- Publication number
- CA2193643A1 CA2193643A1 CA002193643A CA2193643A CA2193643A1 CA 2193643 A1 CA2193643 A1 CA 2193643A1 CA 002193643 A CA002193643 A CA 002193643A CA 2193643 A CA2193643 A CA 2193643A CA 2193643 A1 CA2193643 A1 CA 2193643A1
- Authority
- CA
- Canada
- Prior art keywords
- water
- inclined surface
- tank
- ultraviolet light
- source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000013626 chemical specie Substances 0.000 title claims abstract 4
- 230000003647 oxidation Effects 0.000 title description 4
- 238000007254 oxidation reaction Methods 0.000 title description 4
- 230000001699 photocatalysis Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000003863 metallic catalyst Substances 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 description 8
- 230000003197 catalytic effect Effects 0.000 description 5
- 241001527902 Aratus Species 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000518994 Conta Species 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- HCTVWSOKIJULET-LQDWTQKMSA-M phenoxymethylpenicillin potassium Chemical compound [K+].N([C@H]1[C@H]2SC([C@@H](N2C1=O)C([O-])=O)(C)C)C(=O)COC1=CC=CC=C1 HCTVWSOKIJULET-LQDWTQKMSA-M 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3221—Lamps suspended above a water surface or pipe
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Water Treatments (AREA)
- Catalysts (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
A method of, and an apparatus (10) for, purifying water to destroy and remove chemical species is disclosed involving passing the water down an undulating inclined member (12) formed by a metallic catalyst whilst being exposed to ultraviolet light. The enclosed surface is positioned in a trough (11), and a tank (15) is positioned at the bottom of the inclined trough, and a pump (17) is used to pump water from the tank to the top of the trough. The source of ultraviolet light is an artificial source, or the sun, or both.
Description
PCTiAU 9 5 / O O ~ 7 21 q3643 RECEI~IED O 4 h~ ~99 WATE~ P~IRIFICATION
Technical Field The ~resent in~ention relates to the ~urification of contaminated water, and in ~articular an im~ro~ed method and a~paratus for ~hotocatalytic oxidation of water borne chemical s~ecies, for exam~le, microtoxins, phenolic com~ounds, and ~esticide and insecticide com~ounds.
Background Art Photocatalytic oxidation (destruction and G~ovàl) of water borne chemical s~ecies has been the subject of considerable re3earch in recent years, and has involved oxidisation of a wide range of water borne chemical s~ecies where catalytic surfaces, represented by a suspen~ion of ~owdered catalytic material contained in a closed sy4tem through which the contaminated water circulates, is exposed to a photoactivating light source, or alternati~ely a ~tationery catalytic 4urface is ~rovided over which the contaminated water ~asses whil~t being exposed to a source of ~hotoacti~ating ultra~iolet light which may be sunlight or an artificial ~ource of ultra~iolet light.
Disclosure of the Invention We have found that the destruction and ~e~o~al of chemical s~ecies cont~;n~nts in water can be improved markedly if a stationary catalytic surface formed by-a metallic catalyst, and inclined at an angle down which the cont~m;nated water flows, is exposed to sunlight or artificially generated ultra~iolet light.
The in~ention therefore en~isages a method of purifying water to destroy and remo~e chemical s~ecies, wherein the water is ~assed down an inclined surface formed by a metallic catalyst, wh~lst being exposed to ultra~iolet light, the incl~ned surface also being such as to ~ro~ide turbulence in the water.
The in~ention also en~isages an a~aratus for purifying water to de~troy and remove chemical s~ecies, P~h4J
~CrIAU 9 5 1 0 0 3 7 3 2 1 9 3 6 4 3 RECEI\IEO O 4 APR 199 said ap~aratus com~rising means to provide an inclined surface of metallic catalyst, and exposed to a source of ultraviolet light, said inclined surface alsobeing such as to ~rovide turbulence in the water.
Brief Descri~tion of the Drawinas one ~referred embodiment of the invention will now be described with reference to the accom~anying drawings, in which:
Figure 1 i8 a schematic ~lan view of the a~aratus of the ~referred embodiment and to carry out the method of the ~referred embodiment.
Figure 2 is a schematic side elevational view of the a~paratus of Figure 1, and Figure 3 is an enlarged view of the catalytic surface of the embodiment of Figures 1 and 2.
Best Mode for Carryin~ Out the Invention Referring to the drawings, the a~paratus, ~enerally indicated as 10, comprises an inclined trough 11 which contains an undulating member 12 ~roviding a series of transverse ridges, and consisting of an outer layer 13 of a metallic catalyst ~u~orted as a thin film on a backing 14 of glass fibre matting or glass fibre weave, or any other material which ~rovides a suitable backing. The trough 11 terminates at its lower end above an o~en to~ed tank 15 into which water gravitating down the trough on the metallic catalyst surface is delivered. Water in the tank 15 is drawn through a transfer ~i~e 16 by a ~um~ 17 which ~um~s the water u~ through a su~ply pi~e 18, contA;n;ng a flow control valve 19, to a heA~r manifold 20 from which the water flows to the to~ of the trough 11 and down the trough to the tank 15. The ridges ~rovided by the undulating member 12 assisting generating turbulence in the flow of water down the trough which assists the ~hotocatalytic oxidation of the chemical s~ecies in the contaminated water, whilst if a single ~as8 down the trough is not sufficient to destroy and remove the chemical ~MEN~EDSHEET
~U
2 1 ~ 3 6 4 3 s~ecies, the water ean be cireulated around the ~y~tem as many t~mes as are neeessary to aehle~e the desired result.
In this ~referred embodiment of the invention a lam~ 21 ~roviding a ~ource of ultra~iolet l~ght i8 ~ositioned above and ~arallel to the trough, and extends along substantially the full length of the trough.
Alternatively, or in addition, sunlight may be u ed to provide a natural souree of ultraviolet light when water ~urifieation during daylight hours is acee~table.
In the ~referred embodiment a metallic cataly~t of titanium dioxide antaese has been found to be an effeetive metallie eatalyst, although other metallie catalysts may be effective to the same or lesser extent.
~MENDED8HEET
~E4/AU
Technical Field The ~resent in~ention relates to the ~urification of contaminated water, and in ~articular an im~ro~ed method and a~paratus for ~hotocatalytic oxidation of water borne chemical s~ecies, for exam~le, microtoxins, phenolic com~ounds, and ~esticide and insecticide com~ounds.
Background Art Photocatalytic oxidation (destruction and G~ovàl) of water borne chemical s~ecies has been the subject of considerable re3earch in recent years, and has involved oxidisation of a wide range of water borne chemical s~ecies where catalytic surfaces, represented by a suspen~ion of ~owdered catalytic material contained in a closed sy4tem through which the contaminated water circulates, is exposed to a photoactivating light source, or alternati~ely a ~tationery catalytic 4urface is ~rovided over which the contaminated water ~asses whil~t being exposed to a source of ~hotoacti~ating ultra~iolet light which may be sunlight or an artificial ~ource of ultra~iolet light.
Disclosure of the Invention We have found that the destruction and ~e~o~al of chemical s~ecies cont~;n~nts in water can be improved markedly if a stationary catalytic surface formed by-a metallic catalyst, and inclined at an angle down which the cont~m;nated water flows, is exposed to sunlight or artificially generated ultra~iolet light.
The in~ention therefore en~isages a method of purifying water to destroy and remo~e chemical s~ecies, wherein the water is ~assed down an inclined surface formed by a metallic catalyst, wh~lst being exposed to ultra~iolet light, the incl~ned surface also being such as to ~ro~ide turbulence in the water.
The in~ention also en~isages an a~aratus for purifying water to de~troy and remove chemical s~ecies, P~h4J
~CrIAU 9 5 1 0 0 3 7 3 2 1 9 3 6 4 3 RECEI\IEO O 4 APR 199 said ap~aratus com~rising means to provide an inclined surface of metallic catalyst, and exposed to a source of ultraviolet light, said inclined surface alsobeing such as to ~rovide turbulence in the water.
Brief Descri~tion of the Drawinas one ~referred embodiment of the invention will now be described with reference to the accom~anying drawings, in which:
Figure 1 i8 a schematic ~lan view of the a~aratus of the ~referred embodiment and to carry out the method of the ~referred embodiment.
Figure 2 is a schematic side elevational view of the a~paratus of Figure 1, and Figure 3 is an enlarged view of the catalytic surface of the embodiment of Figures 1 and 2.
Best Mode for Carryin~ Out the Invention Referring to the drawings, the a~paratus, ~enerally indicated as 10, comprises an inclined trough 11 which contains an undulating member 12 ~roviding a series of transverse ridges, and consisting of an outer layer 13 of a metallic catalyst ~u~orted as a thin film on a backing 14 of glass fibre matting or glass fibre weave, or any other material which ~rovides a suitable backing. The trough 11 terminates at its lower end above an o~en to~ed tank 15 into which water gravitating down the trough on the metallic catalyst surface is delivered. Water in the tank 15 is drawn through a transfer ~i~e 16 by a ~um~ 17 which ~um~s the water u~ through a su~ply pi~e 18, contA;n;ng a flow control valve 19, to a heA~r manifold 20 from which the water flows to the to~ of the trough 11 and down the trough to the tank 15. The ridges ~rovided by the undulating member 12 assisting generating turbulence in the flow of water down the trough which assists the ~hotocatalytic oxidation of the chemical s~ecies in the contaminated water, whilst if a single ~as8 down the trough is not sufficient to destroy and remove the chemical ~MEN~EDSHEET
~U
2 1 ~ 3 6 4 3 s~ecies, the water ean be cireulated around the ~y~tem as many t~mes as are neeessary to aehle~e the desired result.
In this ~referred embodiment of the invention a lam~ 21 ~roviding a ~ource of ultra~iolet l~ght i8 ~ositioned above and ~arallel to the trough, and extends along substantially the full length of the trough.
Alternatively, or in addition, sunlight may be u ed to provide a natural souree of ultraviolet light when water ~urifieation during daylight hours is acee~table.
In the ~referred embodiment a metallic cataly~t of titanium dioxide antaese has been found to be an effeetive metallie eatalyst, although other metallie catalysts may be effective to the same or lesser extent.
~MENDED8HEET
~E4/AU
Claims (10)
1. A method of purifying water to destroy and remove chemical species, wherein the water is passed down an inclined surface formed by a metallic catalyst whilst being exposed to ultraviolet light, said inlcined surface also being such as to provide turbulence in the water.
2. A method as claimed in Claim 1, wherein the water is pumped from a tank at the bottom of the inclined surface to the top of the inclined surface, and gravitates down the surface to the tank.
3. A method as claimed in Claim 1 or 2, wherein the source of ultraviolet light is an artificial source, or the sun, or both.
4. A method as claimed in any one of the preceding claims, wherein the flow of water to the top of the inclined surface is regulated.
5. An apparatus for purifying water for destroying and removing chemical species, said apparatus comprising means to provide an inclined surface of metallic catalyst, and exposed to a source of ultraviolet light, said inclined surface also being such as to provide turbulence in the water.
6. An apparatus as claimed in Claim 5, further including a tank positioned at the bottom of said inclined surface, and a pump to pump water from said tank to the top of said surface.
7. An apparatus as claimed in Claim 5 or 6, wherein the source of ultraviolet light is an artificial source, or the sun, or both.
8. An apparatus as claimed in any one of Claims 5 to 7, wherein the means to provide said surface is a backing member to which a layer of metallic catalyst is applied, and said backing member with the metallic catalyst applied thereto is positioned within a trough.
9. An apparatus as claimed in any one of Claims 5 to 8, wherein the means to provide said surface is undulated along its length to provide a series of transverse ridges.
10. An apparatus as claimed in any one of Claims 5 to 9, wherein means are provided to regulate the flow of water to the top of said surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPM6460 | 1994-06-27 | ||
| AUPM6460A AUPM646094A0 (en) | 1994-06-27 | 1994-06-27 | An improved method for the photocatalytic oxidation of water borne chemical species |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2193643A1 true CA2193643A1 (en) | 1996-01-04 |
Family
ID=3781029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002193643A Abandoned CA2193643A1 (en) | 1994-06-27 | 1995-06-26 | Method and apparatus for photocatalytic oxidation of water-borne chemical species |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AUPM646094A0 (en) |
| CA (1) | CA2193643A1 (en) |
| WO (1) | WO1996000190A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19524663A1 (en) * | 1995-07-06 | 1997-01-09 | Sahm Georg Fa | Method and device for traversing thread-like or ribbon-like items to be wound |
| EP0993859A1 (en) | 1998-09-18 | 2000-04-19 | Hitachi Metals, Ltd. | Three-dimensional, photocatalytic filter apparatus |
| FR2819799B1 (en) * | 2001-01-22 | 2003-11-07 | Ahlstrom Res And Competence Ct | PROCESS FOR TREATING CHARGED LIQUID EFFLUENTS AND PLANT FOR IMPLEMENTING THE PROCESS |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60118289A (en) * | 1983-11-30 | 1985-06-25 | Giken Kogyo Kk | Water purifying method |
| JPS60118236A (en) * | 1983-11-30 | 1985-06-25 | Giken Kogyo Kk | Molded photo-oxidation catalyst body |
| JPS62193696A (en) * | 1986-02-20 | 1987-08-25 | Nomura Micro Sci Kk | Production of extremely pure water |
| AU600289B2 (en) * | 1986-07-22 | 1990-08-09 | Commonwealth Scientific And Industrial Research Organisation | Coating photoactive metal oxides onto substrates |
| AT389099B (en) * | 1987-09-08 | 1989-10-10 | Simmering Graz Pauker Ag | METHOD AND DEVICE FOR CLEANING A LIQUID CONTAINED WITH ORGANIC AND / OR INORGANIC FOREIGN MATERIALS, AND USE OF A SEMICONDUCTOR LAYER |
| JP2669039B2 (en) * | 1989-03-22 | 1997-10-27 | 松下電器産業株式会社 | Photocatalytic device manufacturing method |
| IT1231959B (en) * | 1989-09-15 | 1992-01-16 | Eniricerche Spa | METHOD FOR THE HETEROGENEOUS CATALYTIC PHOTODEGRADATION OF POLLUTANTS |
| JPH0751236B2 (en) * | 1989-12-25 | 1995-06-05 | 松下電器産業株式会社 | How to purify drinking water |
| JPH074595B2 (en) * | 1990-09-03 | 1995-01-25 | 有限会社水商 | Drinking water container with resolution of organic halogen compounds |
| GB9102766D0 (en) * | 1991-02-09 | 1991-03-27 | Tioxide Group Services Ltd | Destruction process |
| JPH05154473A (en) * | 1991-12-06 | 1993-06-22 | Nippon Fuoto Sci:Kk | Photochemical reaction treatment for fluid |
| JP3592727B2 (en) * | 1992-05-11 | 2004-11-24 | 日本電池株式会社 | Photocatalyst |
| JP3215715B2 (en) * | 1992-06-09 | 2001-10-09 | サンデン株式会社 | Water purification equipment |
| JP3270133B2 (en) * | 1992-08-31 | 2002-04-02 | 野村マイクロ・サイエンス株式会社 | Purification method |
| JPH06170360A (en) * | 1992-12-08 | 1994-06-21 | Japan Storage Battery Co Ltd | Method for decomposing malodorous and distasteful substance |
| US5395522A (en) * | 1993-02-23 | 1995-03-07 | Anatel Corporation | Apparatus for removal of organic material from water |
| DE69415228T2 (en) * | 1993-07-12 | 1999-06-02 | Ishihara Sangyo Kaisha | Process for producing a photocatalyst and process for water purification |
-
1994
- 1994-06-27 AU AUPM6460A patent/AUPM646094A0/en not_active Abandoned
-
1995
- 1995-06-26 CA CA002193643A patent/CA2193643A1/en not_active Abandoned
- 1995-06-26 WO PCT/AU1995/000373 patent/WO1996000190A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| AUPM646094A0 (en) | 1994-07-21 |
| WO1996000190A1 (en) | 1996-01-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |