WO1997014657A1 - Advanced oxidation of water using catalytic ozonation - Google Patents
Advanced oxidation of water using catalytic ozonation Download PDFInfo
- Publication number
- WO1997014657A1 WO1997014657A1 PCT/GB1996/002525 GB9602525W WO9714657A1 WO 1997014657 A1 WO1997014657 A1 WO 1997014657A1 GB 9602525 W GB9602525 W GB 9602525W WO 9714657 A1 WO9714657 A1 WO 9714657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- ozone
- water
- contaminants
- waste water
- Prior art date
Links
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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
Definitions
- the present invention relates to the treatment of surface water or aqueous effluent to remove organic impurities therefrom.
- COD Chemical Oxygen Demand
- BOD Bio Oxygen Demand
- hard COD the amount of oxygen required to oxidize the non-biodegradable contaminants
- catalysts have been used in the Zimmerman process . These catalysts include noble or heavy metals such as palladium, platinum, cobalt or iron deposited on a carrier of, for example, alumina, silica-alumina, silica gel, activated carbon, titania or zirconia (see JP-A-49- 44556 (1974) ; JP-A-49-94157 (1974) ; and JP-A-58-64188 (1983) ) .
- alumina silica-alumina, silica gel, activated carbon, titania or zirconia
- Ozone is the strongest molecular oxidant for water treatment and it has been used since the beginning of this century in drinking water treatment to provide disinfection, removal of colour, taste and odour, and destruction of organic compounds.
- ozone is very selective in its reactions; it predominantly reacts with compounds containing unsaturated bonds such as olefins, aromatic compounds and/or compounds containing electron rich groups such as sulfur and nitrogen.
- unsaturated bonds such as olefins, aromatic compounds and/or compounds containing electron rich groups such as sulfur and nitrogen.
- saturated alkanes and chlorinated organics most of pesticides and priority pollutants
- these ozone refractory contaminants can be oxidized by hydroxyl radicals which are usually formed by activating ozone with hydrogen peroxide or ultraviolet light ("advanced oxidation”) .
- Hydrogen peroxide has an operation cost higher than ozone and ultraviolet light requires capital and operational costs at least equal to that of ozone generation. Accordingly, the activation of ozone to hydroxyl radicals by these two methods results in a large increase (50 - 200%) in the cost of water treatment. Moreover, since hydroxyl radical reactions are much less specific than those involving ozone alone, the hydroxyl radicals generated in solution by hydrogen peroxide or ultraviolet light activation of ozone can be wasted by reaction with non-target inhibitors or scavengers, such as carbonate and bicarbonate ions, which do not require oxidation. Thus, a more cost effective method of ozone activation is needed.
- PL-A-56775 (1969) reported that ozone-containing gas had been used in a continuous oxidation process to purify waste water from coke ovens but that the treatment was uneconomic for industrial use. It was proposed in PL-A- 56775 that the waste water should be continuously treated with ozone-containing gas in a froth phase by blowing the gas countercurrent to the waste water in a scrubber packed with Rashig rings, slag and/or oxides of silver, copper, aluminium, zinc, magnesium, tin, lead, iron, or manganese as catalysts.
- US-A-4007118 (1977) discloses the ozonation of waste water using a transition metal catalyst, such as manganese trioxide, ferric oxide, copper oxide or nickel oxide, which is present as a powder contained in fabric bags, disposed on a substrate or dispersed within the waste water
- US-A-4040982 (1977) discloses a method of removing contaminants from waste water by treatment with ozone- containing gas in the presence of a catalyst comprising ferric oxide supported on catalytically active alumina and having a surface area of 150 to 450 m 2 /g and a pore volume of at least 0.3 cm 3 .
- the exemplified alumina is gamma alumina but reference is made to eta alumina, amorphous alumina and activated alumina.
- JP-A-58-37039 (1983) discloses a method of removal of an aromatic organic compound from waste water by mixing first with a surfactant, then with a transition metal or alkaline earth metal compound, and contacting the resultant mixture with ozone-containing gas to oxidatively decompose the organic compound.
- NL-A-9001721 (1991) discloses the treatment of iron- containing waste water by forming and removing precipitated Fe(III) by mixing with hydrogen peroxide,- then forming and removing precipitated carbonate by adding, for example, calcium hydroxide, calcium chloride and/or alkali metal hydroxide; and subsequently oxidation with, for example, ozone-containing gas alone or with a solid catalyst, to remove residual organic compounds.
- Specified catalysts are activated carbon, alumina or silica. It is stated that the catalyst must have a surface area of at least 50 m 2 /g and a pore volume cf greater than C.l cm 3 /g and that its activity can be improved by addition of a transition metal such as copper, iron, molybdenum or cobalt.
- ozone-containing gas is passed through a bubble reactor countercurrently to liquid effluent from a catalyst bed and the gas exiting the bubble reactor is passed through that catalyst bed cocurrently with the partially treated waste water. If required, additional ozone- containing gas can be added to supplement the ozone content of the gas exiting the bubble reactor.
- US-A-5, 145,587 (1992) discloses the treatment of waste water by wet oxidation with a molecular oxygen-containing gas in the presence of a solid catalyst comprising (i) titanium dioxide; (ii) an oxide of a lanthanide element; and (iii) at least one metal selected from manganese, iron, cobalt, nickel, tungsten, copper, silver, gold, platinum, palladium, rhodium, ruthenium and iridium or a water insoluble or sparingly soluble compound thereof.
- the catalyst is formed by adding component (iii) to a calcined mixture of (i) and (ii) and preferably is in the form of an integral or monolithical structure, such as an extruded honeycomb (having straight through channels) , of (i) and (ii) impregnated with (iii) .
- the preferred oxidants are oxygen, ozone, hydrogen peroxide or mixtures of oxygen with ozone or hydrogen peroxide.
- US-A-5352369 (1994) discloses a method of treating water to kill bacteria therein by contact with a silver catalyst in the presence of oxygen to form an active oxidizer in the water.
- the silver catalyst is formed by depositing elemental silver on an alumina matrix and heating to a temperature of at least 300°C.
- ozone-containing gas is used as the source of oxygen but it is required that the water be exposed to the silver catalyst as soon as the ozone- containing gas has been added to the water.
- a process for the removal of contaminants from water which comprises contacting the water with ozone in the absence of a catalyst to oxidize ozone-oxidizable contaminants and to dissolve ozone in the water, and contacting the resultant ozone-containing water with a solid ozone activation catalyst to oxidize ozone refractory contaminants in the water.
- the process of the invention permits the use of some relatively inexpensive solid catalysts which are widely used in the chemical industry for chemical synthesis.
- the waste water first reacts with ozone in a gas-liquid contactor and the easily oxidisable contaminants are removed.
- the thus treated waste water (free from gas bubbles but with residual dissolved ozone) passes through the ozone activation catalyst where the residual ozone is activated to secondary oxidants more reactive than ozone and which decompose contaminants remaining after treatment in the gas-liquid contactor.
- the effluent from the catalyst treatment can be re-injected to the gas-liquid contactor to absorb more ozone for reaction if the concentration of contaminants is too high to reduce in a single pass through the catalyst (i.e. the oxidant demand of the waste water is higher than the maximum ozone solubility in water under the operational conditions) .
- the waste water treated by the process of the invention usually will have a COD of at most 5000 mg/l.
- the extent of the advanced oxidation by the process will be determined mainly by environmental requirements, which presently require the COD of waste water to be reduce to at most 125 mg/l before discharge.
- the use of a two phase catalysis (liquid/solid) instead of the conventional three phases (gas/liquid/solid) used in prior art advanced oxidation catalysis improves the reaction rate and reduces catalyst erosion.
- the ozone-containing gas will be an ozone/oxygen or ozone/air mixture but pure ozone or ozone in admixture with any inert carrier gas can be used.
- the catalyst can be in any solid form but usually will be in the form of granules, pellets or an integral or monolithic structure especially having a three dimensional continous pore phase.
- the catalyst will be monolithic having a low surface area ( ⁇ 20 m 2 /g) and/or high porosity ( ⁇ 5 pores per linear inch,- ⁇ 2 pores per cm) . It is especially preferred that the catalyst is in the form of foamed monolithic structure with high porosity and low pressure drop ( ⁇ 0.1 bar g; ⁇ 10 kPa in a cylindrical reactor of 1000 mm high and 24 mm ID at a water flow rate of 7 litre/min) .
- the catalyst can be any of those conventionally employed in advanced oxidation catalysis of water.
- it can be a transition metal oxide, such as cobalt oxide, copper oxide, ferric oxide, manganese trioxide or nickel oxide, optionally on a carrier of, for example, alumina, silica-alumina, silica gel, activated carbon, titania or zirconia.
- the catalyst preferably is a gamma-alumina catalyst, especially undoped gamma alumina optionally on a carrier, especially alpha alumina.
- Figure 1 is a graph of percentage COD removal (ordinate) against ozone consumed (abscissa) for a process of the invention using a gamma alumina catalyst (Catalyst C3 ,- see Example 1 infra) and for a conventional (0 3 /UV) advanced oxidation process
- Figure 2 is a graph of percentage COD removal (ordinate) against ozone consumed (abscissa) for a process of the invention using a monolithic catalyst of gamma alumina on an alpha alumina carrier (see Example 2 infra) and for a conventional (0 3 /UV) advanced oxidation process,-
- Figure 3 is a diagrammatic representation of apparatus for the removal of organic contaminants from high strength waste water using a process of the present invention,- and
- Figure 4 is a diagrammatic representation of apparatus for the removal of organic contaminants from low strength waste water using a process of the present invention.
- a stream (1) of waste water which has been treated by conventional microbiological or chemical processes to reduce the COD to 5000 mg/l or less is mixed with a recycle stream (2) of water containing dissolved ozone.
- the resultant mixed stream (3) is pumped (4) upwardly through a fixed catalyst bed (5) and the bed effluent (6) is passed to a gas-liquid contactor (7) in which it is thoroughly mixed with an ozone-containing gas (8) from an ozone generator (not shown) .
- the bulk of the ozonated water is removed in recycle stream (2) but a smaller portion is removed (9) for discharge or further treatment. Undissolved gas is removed in a gaseous discharge stream (10) for reuse and/or return to the ozone generator.
- the process of Figure 4 differs from that of Figure 3 in that the waste water stream (1) is pumped (14) to the gas-liquid contactor (17) where it is mixed with ozone- containing gas (8) . All of the ozonated waste water from the gas-liquid contactor (17) is passed upwardly through the catalyst bed (5) . In this process, the spent ozone containing gas is removed (10) from the gas-liquid contactor (17) but the treated waste water discharge (19) is from the catalvst bed (5) .
- the combination of ozone with Catalyst C3 offers advantages over the current 0 3 /UV advanced oxidation process in the destruction of COD as indicated by the comparative results in Figure 1.
- the removal of COD was much higher with the Catalyst C3 catalytic ozonation than the 0 3 /UV process at the same ozone dosages.
- the ozone required for the same degree of COD removal by the Catalyst C3 catalytic ozonation is less than 50% of that by the 0 3 /UV process, representing a significant reduction in treatment cost.
- Catalyst C3 maintained its catalytic activity after 100 hours operation. Municipal secondary effluent, landfill leachate, and waste water from a hospital sewer were all satisfactorily treated using this catalyst.
- Example 1 The procedure of Example 1 was repeated using, as catalyst, a foamed monolithic material of 92% alpha alumina (low surface area) and coated with 5% gamma alumina (RETICEL TM HPA washcoat reticulated ceramic) sold as a filter media.
- the base material has a pore density of 10 pores per linear inch (4 pores per cm) and a calculated surface area of 2290 m 2 /m 3 ( ⁇ 5xl0 "3 ⁇ r/g) .
- the 5% washcoat increases the surface area to 15 m 2 /g.
- This material achieved similar COD removal rate as the 0 3 /UV process with little back-pressure (see Figure 2 ) .
- a pressure drop of 0.02 bar g (2 kPa) was recorded at a water flow rate of 7 litre/min compared with 0.8 bar g (80 kPa) for Catalyst 3 (in granular form) under the same conditions.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96935002A EP0859746A1 (en) | 1995-10-17 | 1996-10-16 | Advanced oxidation of water using catalytic ozonation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9521359.1 | 1995-10-17 | ||
GBGB9521359.1A GB9521359D0 (en) | 1995-10-17 | 1995-10-17 | Advanced oxidation of water using catalytic ozonation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997014657A1 true WO1997014657A1 (en) | 1997-04-24 |
Family
ID=10782519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1996/002525 WO1997014657A1 (en) | 1995-10-17 | 1996-10-16 | Advanced oxidation of water using catalytic ozonation |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0859746A1 (en) |
CA (1) | CA2231193A1 (en) |
GB (1) | GB9521359D0 (en) |
TW (1) | TW414783B (en) |
WO (1) | WO1997014657A1 (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0913193A2 (en) * | 1997-10-21 | 1999-05-06 | Karsten Pedersen | Catalyst, process and process unit for the abatement of noxious compounds in water |
EP0997440A2 (en) * | 1998-10-23 | 2000-05-03 | The Kansai Electric Power Co., Inc. | Process for accelerating reaction of ozone and waste water with a catalyst |
EP2366671A1 (en) * | 2010-03-18 | 2011-09-21 | Air Products And Chemicals, Inc. | Apparatus and method for dissolution of ozone in water and catalytic oxidation |
US8871098B2 (en) | 2011-09-22 | 2014-10-28 | Air Products And Chemicals, Inc. | Gas dispersion apparatus for improved gas-liquid mass transfer |
CN104986848A (en) * | 2015-07-24 | 2015-10-21 | 天津万峰环保科技有限公司 | Electromagnetic (EM) advanced catalytic oxidation sewage deep treatment process |
WO2017100335A1 (en) * | 2015-12-07 | 2017-06-15 | The University Of North Carolina At Charlotte | Devices, systems, and methods for heterogeneous catalytic quenching of hydrogen peroxide in a water source |
CN111646561A (en) * | 2020-06-13 | 2020-09-11 | 深圳市创飞格环保技术有限公司 | Ozone catalytic oxidation reactor for sewage treatment and sewage circulation treatment method |
CN111792751A (en) * | 2020-06-18 | 2020-10-20 | 神马实业股份有限公司 | Treatment method of caprolactam production wastewater |
US10851000B2 (en) | 2018-03-28 | 2020-12-01 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Systems for producing high-concentration of dissolved ozone in liquid media |
CN112569946A (en) * | 2020-12-28 | 2021-03-30 | 广西柳钢环保股份有限公司 | Ozone catalyst for organic wastewater treatment and preparation method thereof |
CN112919616A (en) * | 2021-02-18 | 2021-06-08 | 科盛环保科技股份有限公司 | High-efficient ozone catalytic oxidation reactor for advanced treatment of chemical industry park sewage tail water |
CN113184975A (en) * | 2021-06-10 | 2021-07-30 | 青岛派尼尔环保技术有限公司 | Advanced catalytic oxidation process for ozone |
US11084744B2 (en) | 2018-03-28 | 2021-08-10 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for mixing gas-free liquid oxidant with process liquid |
CN113289614A (en) * | 2021-06-03 | 2021-08-24 | 上海庞科环境技术有限公司 | Preparation method of three-dimensional alumina coating ozone catalyst for antibiotic wastewater |
US11434153B2 (en) | 2018-03-28 | 2022-09-06 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés George Claude | Separation of ozone oxidation in liquid media into three unit operations for process optimization |
GR1010508B (en) * | 2022-05-20 | 2023-07-20 | Αριστοτελειο Πανεπιστημιο Θεσσαλονικης-Ειδικος Λογαριασμος Κονδυλιων Ερευνας, | Method of removing micropollutants by use of heterogenous catalytic ozonation from water |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW590789B (en) | 2001-09-14 | 2004-06-11 | Ind Tech Res Inst | Method of treating an air stream containing VOCs |
CN105712466B (en) * | 2014-12-01 | 2018-11-06 | 大连福瑞普科技有限公司 | A kind of ozone catalytic wet oxidation method of phenol wastewater |
CN110639491B (en) * | 2018-06-26 | 2022-09-16 | 宁波市雨辰环保科技有限公司 | Catalyst for harmless treatment of highly toxic wastewater and preparation method and application thereof |
CN115228482B (en) * | 2022-08-15 | 2023-09-12 | 广州桑尼环保科技有限公司 | Ozone catalyst taking aluminum sludge as raw material and preparation method and application thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0436409A1 (en) * | 1989-12-07 | 1991-07-10 | Anjou Recherche (Groupement D'interet Economique Dit:) | Method for ozonizing water by means of heterogeneous catalyst activation |
EP0561458A1 (en) * | 1992-03-19 | 1993-09-22 | E.M. Engineering F.T.S. B.V. | Process and apparatus for the purification of water |
JPH06335690A (en) * | 1993-05-31 | 1994-12-06 | Kubota Corp | Ozone catalytic reaction tank |
-
1995
- 1995-10-17 GB GBGB9521359.1A patent/GB9521359D0/en active Pending
-
1996
- 1996-04-19 TW TW85104678A patent/TW414783B/en active
- 1996-10-16 CA CA002231193A patent/CA2231193A1/en not_active Abandoned
- 1996-10-16 WO PCT/GB1996/002525 patent/WO1997014657A1/en not_active Application Discontinuation
- 1996-10-16 EP EP96935002A patent/EP0859746A1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0436409A1 (en) * | 1989-12-07 | 1991-07-10 | Anjou Recherche (Groupement D'interet Economique Dit:) | Method for ozonizing water by means of heterogeneous catalyst activation |
EP0561458A1 (en) * | 1992-03-19 | 1993-09-22 | E.M. Engineering F.T.S. B.V. | Process and apparatus for the purification of water |
JPH06335690A (en) * | 1993-05-31 | 1994-12-06 | Kubota Corp | Ozone catalytic reaction tank |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 199508, Derwent World Patents Index; AN 1995-057027, XP002020855 * |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0913193A2 (en) * | 1997-10-21 | 1999-05-06 | Karsten Pedersen | Catalyst, process and process unit for the abatement of noxious compounds in water |
EP0913193A3 (en) * | 1997-10-21 | 2000-03-22 | Karsten Pedersen | Catalyst, process and process unit for the abatement of noxious compounds in water |
EP0997440A2 (en) * | 1998-10-23 | 2000-05-03 | The Kansai Electric Power Co., Inc. | Process for accelerating reaction of ozone and waste water with a catalyst |
EP0997440A3 (en) * | 1998-10-23 | 2000-05-10 | The Kansai Electric Power Co., Inc. | Process for accelerating reaction of ozone and waste water with a catalyst |
EP2366671A1 (en) * | 2010-03-18 | 2011-09-21 | Air Products And Chemicals, Inc. | Apparatus and method for dissolution of ozone in water and catalytic oxidation |
KR101304087B1 (en) | 2010-03-18 | 2013-09-05 | 에어 프로덕츠 앤드 케미칼스, 인코오포레이티드 | Apparatus and method for dissolution of ozone in water and catalytic oxidation |
TWI418522B (en) * | 2010-03-18 | 2013-12-11 | Air Prod & Chem | Apparatus and method for dissolution of ozone in water and catalytic oxidation |
US8808550B2 (en) | 2010-03-18 | 2014-08-19 | Air Products And Chemicals, Inc. | Apparatus and method for dissolution of ozone in water and catalytic oxidation |
US8871098B2 (en) | 2011-09-22 | 2014-10-28 | Air Products And Chemicals, Inc. | Gas dispersion apparatus for improved gas-liquid mass transfer |
CN104986848A (en) * | 2015-07-24 | 2015-10-21 | 天津万峰环保科技有限公司 | Electromagnetic (EM) advanced catalytic oxidation sewage deep treatment process |
WO2017100335A1 (en) * | 2015-12-07 | 2017-06-15 | The University Of North Carolina At Charlotte | Devices, systems, and methods for heterogeneous catalytic quenching of hydrogen peroxide in a water source |
US11124439B2 (en) | 2015-12-07 | 2021-09-21 | The University Of North Carolina At Charlotte | Devices, systems, and methods for heterogeneous catalytic quenching of hydrogen peroxide in a water source |
US11084744B2 (en) | 2018-03-28 | 2021-08-10 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for mixing gas-free liquid oxidant with process liquid |
US10851000B2 (en) | 2018-03-28 | 2020-12-01 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Systems for producing high-concentration of dissolved ozone in liquid media |
US10858271B2 (en) | 2018-03-28 | 2020-12-08 | L'Air Liquide, SociétéAnonyme pour l'Etude et l'Exploitation des Procédés Claude | Methods for producing high-concentration of dissolved ozone in liquid media |
US11434153B2 (en) | 2018-03-28 | 2022-09-06 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés George Claude | Separation of ozone oxidation in liquid media into three unit operations for process optimization |
CN111646561A (en) * | 2020-06-13 | 2020-09-11 | 深圳市创飞格环保技术有限公司 | Ozone catalytic oxidation reactor for sewage treatment and sewage circulation treatment method |
CN111792751A (en) * | 2020-06-18 | 2020-10-20 | 神马实业股份有限公司 | Treatment method of caprolactam production wastewater |
CN112569946A (en) * | 2020-12-28 | 2021-03-30 | 广西柳钢环保股份有限公司 | Ozone catalyst for organic wastewater treatment and preparation method thereof |
CN112919616A (en) * | 2021-02-18 | 2021-06-08 | 科盛环保科技股份有限公司 | High-efficient ozone catalytic oxidation reactor for advanced treatment of chemical industry park sewage tail water |
CN113289614A (en) * | 2021-06-03 | 2021-08-24 | 上海庞科环境技术有限公司 | Preparation method of three-dimensional alumina coating ozone catalyst for antibiotic wastewater |
CN113184975A (en) * | 2021-06-10 | 2021-07-30 | 青岛派尼尔环保技术有限公司 | Advanced catalytic oxidation process for ozone |
GR1010508B (en) * | 2022-05-20 | 2023-07-20 | Αριστοτελειο Πανεπιστημιο Θεσσαλονικης-Ειδικος Λογαριασμος Κονδυλιων Ερευνας, | Method of removing micropollutants by use of heterogenous catalytic ozonation from water |
WO2023223058A1 (en) | 2022-05-20 | 2023-11-23 | Aristotle University Of Thessaloniki-E.L.K.E. | Method for the removal of micropollutants by the application of heterogeneous catalytic ozonation from water |
Also Published As
Publication number | Publication date |
---|---|
CA2231193A1 (en) | 1997-04-24 |
EP0859746A1 (en) | 1998-08-26 |
TW414783B (en) | 2000-12-11 |
GB9521359D0 (en) | 1995-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0859746A1 (en) | Advanced oxidation of water using catalytic ozonation | |
AU749633B2 (en) | Method for mineralization of organic pollutants in water by catalytic ozonization | |
Pirkanniemi et al. | Heterogeneous water phase catalysis as an environmental application: a review | |
EP0473680B1 (en) | Process for the purification of contaminated water by activated ozone | |
US5505856A (en) | Process for the purification of contaminated water by activated ozone | |
US5792336A (en) | Method for purification of wastewater from soluble substances | |
KR20020043946A (en) | Oxidation catalyzer, method for fabricating the same, method for recycling the same, and method for treating waste water using the same | |
JP2007509740A (en) | Apparatus and method for purifying aqueous effluents by oxidation and membrane filtration | |
JP3293181B2 (en) | Gas phase decomposition treatment method for volatile organic halogen compound-containing gas | |
EP3333131B1 (en) | Purification treatment method of liquid containing harmful substance, and purification treatment device of liquid containing harmful substance for carrying out said method | |
JP3811614B2 (en) | Wastewater treatment method | |
EP4208412A1 (en) | Wastewater ozone treatment | |
JP2740623B2 (en) | Advanced sewage treatment method | |
JPH091165A (en) | Treatment of ammonia-containing waste water | |
JP4187845B2 (en) | Method for treating ammonia-containing water | |
JP2000167570A (en) | Treatment of waste water | |
KR100465521B1 (en) | Method of treating wastewater using catalytic wet oxidation process | |
JP2004105903A (en) | Treatment method for hydrazine-containing wastewater | |
JP4450146B2 (en) | COD component-containing water treatment method | |
JPH07265870A (en) | Treatment of dithionate ion-containing water | |
JPH11253970A (en) | Removal of organic chlorine compound in drainage | |
JP3568298B2 (en) | Method for treating power plant wastewater containing amine compounds | |
JP2003251375A (en) | Treatment method for organic wastewater | |
JPH0889981A (en) | Treatment of organic waste water and device therefor | |
JPH06106171A (en) | Treatment of volatile organohalogen compound |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): BR CA KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
ENP | Entry into the national phase |
Ref document number: 2231193 Country of ref document: CA Ref country code: CA Ref document number: 2231193 Kind code of ref document: A Format of ref document f/p: F |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1996935002 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996935002 Country of ref document: EP |
|
WWR | Wipo information: refused in national office |
Ref document number: 1996935002 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1996935002 Country of ref document: EP |