KR20080009985A - Wastewater treatment method using high pressure advanced oxidation process to reuse unreacted ozone - Google Patents

Abstract

The present invention relates to a wastewater treatment apparatus for a high pressure advanced oxidation process using a photooxidation reaction of ozone, photocatalyst and ultraviolet light, and a water treatment method using the same. More specifically, the present invention exists in the form of a bubble due to low solubility in water in a conventional atmospheric pressure advanced oxidation process. To solve the problem that ozone has low contact efficiency with contaminants, when ozone is converted to high pressure by dissolving a large amount of ozone, the contact efficiency between contaminants and ozone is good. In addition, the rate of decomposition of pollutants increases dramatically due to the increase in the generation of OH radicals, which are strongly oxidized by UV and ozone photooxidation reactions, and the pre-treatment flotation and gas-liquid separation flotation. Of suspended solids in wastewater by dissolved ozone / air flotation Unreacted ozone reuse process that eliminates injury and removes contaminants. Unreacted to dramatically reduce installation and operation costs by reducing the size of the advanced wastewater treatment system and the capacity of expensive ozone generators by increasing the use efficiency of ozone. Provided is a high pressure advanced oxidation process wastewater treatment apparatus using a high pressure photooxidation apparatus equipped with an ozone reuse system, and a water treatment method using the same.

Description

Wastewater treatment device using high pressure advanced oxidation process with unreacted ozone reuse system and method for water treatment using same {Wastewayer treatment device and method high pressure advanced oxidation process (HPAOP) with unreacted ozone reusing system}

1 is a diagram schematically illustrating a high pressure advanced oxidation wastewater treatment system equipped with an unreacted ozone reuse system

2 is a diagram schematically illustrating the high-pressure photooxidation reaction apparatus

3 is a diagram illustrating a coil spring-type carrier coated with a photocatalyst and a photocatalyst and a wire surface coated on the coil spring surface.

Figure 4 is a comparison of the decomposition rate of brine pickled saline COD by high pressure and atmospheric pressure oxidation oxidation

5 is a comparison of the removal rate of brine turbidity of pickled cabbage by high pressure and atmospheric pressure oxidative oxidation

<Description of the symbols for the main parts of the drawings>

10: wastewater storage tank 11: flotation wastewater inflow line

12: Floating tank pressurized pump wastewater inflow line

20: treated wastewater reservoir

30: pretreatment injuries 31: primary pretreatment injuries 32: secondary pretreatment injuries

31d, 32d: pre-treatment scum removal hole

35: floating tank pressurized pump 36: floating tank unreacted ozone return line

39: mine wastewater supply pipe

40: gas-liquid separation aid

45: unreacted ozone return line

50: flue gas ozone removal device

60: high pressure photooxidation device

63; Treated water circulation line 63a: circulating pump

65: photooxidation pressure pump

69: treated water return line

70: ozone generator 80: photocatalytic reaction unit control unit

100: Schematic drawing of a wastewater treatment apparatus using a high pressure advanced oxidation process equipped with an unreacted ozone reuse system

The water treatment method using the Advanced Oxidation Process (AOP) is an OH radical (OH °, Hydroxy radical) which has a strong sterilization and oxidation power by using an oxidizing agent such as ozone or hydrogen peroxide or by irradiating the oxidizing agent with ultraviolet rays. ) Is an intermediate product that oxidizes and decomposes organic pollutants in waste water.It decomposes hardly decomposable substances such as synthetic detergents and pesticides, which are not easily decomposed by general treatment methods, or contaminates high concentrations of contaminants in a short time. It is a more advanced water treatment technology developed for treatment, which is more efficient due to the recent environmental pollution, the emergence of new materials that cannot be treated by existing treatment methods, and the increase of the amount of these hardly decomposable substances into the waste water. There was a demand for technological development of good wastewater treatment methods. In addition, the revised legislation requires mandatory water treatment facilities for buildings of a certain size, and therefore, water treatment facilities in urban buildings, where biological treatment methods are difficult to apply, and existing plants where it is difficult to increase wastewater treatment capacity. When the increased wastewater has to be treated, the demand for a water treatment method using the advanced oxidation process technology that can treat the large amount of wastewater in a short time without generating odor is high and the wastewater treatment efficiency is increasing.

Recently, various attempts have been made to improve the decomposition efficiency of the advanced oxidation process. To improve the solubility of ozone, multiple reactors are installed, or to improve the solubility, the ozone is first pressurized with a compressor to pressurize the waste water to high pressure. A method using a dissolved ozone flotation (DOF) method, which reacts with contaminants and fine ozone while forming fine ozone bubbles and floating them, is discharged into the waste water at atmospheric pressure. The dissolved ozone flotation method is expected to increase the decomposition reaction efficiency by increasing the contact efficiency of ozone in such a way that the bubble size is smaller and the surface area is larger than when bubbles are generated by conventional ejectors.

In addition, in order to improve the decomposition efficiency of ozone, ultraviolet (UV) is irradiated, and a perforated plate is installed around the ultraviolet lamp, so ozone passes around the lamp, so that the characteristics of ultraviolet ray (254 nm) with low underwater penetration force are considered, The photocatalyst coated with the photocatalyst on the porous plate and the photocatalyst irradiated with ultraviolet light were expected to improve the decomposition reaction efficiency by OH radicals generated by decomposing ozone. The water treatment apparatus and the water treatment method using the advanced oxidation process are disclosed in Korean Patent Laid-Open Publication No. 109288, Registration No. 289275, and No. 551573.

However, the patent has the following problems. First, Korean Publication No. 109288 and Registration No. 289275 pressurize ozone using a compressor to purify the waste water, and pressurized ozone is dissolved in the pressurized waste water by a pump, and then added to the waste water under normal pressure to ultrafine. The dissolved ozone flotation method, which generates bubble ozone to increase the contact area, can increase the decomposition reaction efficiency by increasing the contact efficiency of contaminants due to the smaller ozone bubble than the flotation method by ejector or the like, in which the bubble of ozone is relatively large. There is a limit to the amount of ozone that can be dissolved in water under normal pressure.The reaction rate is due to the decomposition of ozone and pollutants through the gas-liquid interface because most of the added ozone exists in the form of bubbles. Is slow Although the decomposition area is increased by decreasing the pore size, the contact area is increased, but since the introduced ozone is quickly floated on the water, it is relatively small that gaseous ozone participates in the decomposition reaction. There is a limit to increase.

Existing advanced oxidation processes are related to the technology of reducing the bubble size, and most of the wastewater treatment by the dissolved ozone flotation method, which leads the reaction at the gas-liquid interface, improves the contact efficiency between ozone and pollutants. This method uses ozone's unique oxidizing power to oxidize and decompose organic contaminants, which is faster and more efficient than biological decomposition methods.However, for many pollutants, the decomposition reaction rate is slow and the volume of the reaction apparatus becomes large. There was a limitation in treating only with ozone due to the presence of unreacted substances and increased inflow of hardly decomposable substances such as pesticides and synthetic detergents into sewage or wastewater.

In order to make up for the shortcomings of ozone, ozone + hydrogen peroxide (H ₂ O) is generated by reacting oxidants such as hydrogen peroxide and ultraviolet rays simultaneously to decompose ozone to produce OH radicals with strong oxidizing power, and to decompose pollutants by the OH radicals. ₂ ) There are advanced oxidation processes such as ozone + ultraviolet, ozone + photocatalyst + ultraviolet, ozone + ultrasound.

Korean Patent No. 551573 is a method for advanced oxidation process using ozone + photocatalyst + ultraviolet rays, but ozone is injected into the lower part of the reactor and dispersed and passed through the porous plate perforated around the UV lamp, or decomposed or coated on the surface of the porous plate. Although the decomposition reaction is configured to proceed, most of the added ozone exists in the form of bubbles, so as the amount of ozone is increased, the amount of bubbles increases, which hinders the irradiation of ultraviolet rays, and the bubble size of ozone increases, rather it is polluted. By reducing the contact efficiency with the material, the amount of OH radicals generated by the reaction of ozone and the reduction of oxidation by ozone may be rather reduced. The patent is provided with a water treatment device equipped with a porous plate coated with a photocatalyst through which the ultraviolet lamp penetrates to improve the reaction of ozone and ultraviolet rays, but the number of porous plates that can be installed is limited due to reasons such as pressure loss, Due to the interference of UV irradiation due to ozone bubbles, it is not possible to increase the production of OH radicals due to UV decomposition and photocatalytic reactions. As a result, it is impossible to increase the surface area of the photocatalyst coating due to the increased pressure loss caused by the installed porous plate, and thus the processing capacity is limited. The solubility of ozone in the form of bubbles is low, and the permeation of ultraviolet rays is impeded to improve the decomposition reaction efficiency. There is a problem that there is a limit.

In addition, in the advanced oxidation process using the existing dissolved ozone flotation method, ozone is pressurized to a high pressure by a compressor, pressurized waste water is pressurized by a pressurized pump, and the above-mentioned high pressure ozone is dissolved in high-pressure waste water and then discharged to normal pressure. To form super-fine ozone bubbles and float them to the top to float or react with pollutants to remove pollutants. Dissolved Air Flotation (DAF) and Dissolved Ozone Injuries Water treatment method named (DOF, Dissolved Ozone Flotation) is introduced in the Republic of Korea Patent Publication Nos. 10-2006-0026698, 10-2005-0109288 and 0321800, 0420561, but the conventional Floating material and pollutant removal method using the floating method of air or ozone in the form of fine bubbles, the waste water is sucked and compressed by a pressure pump, air and ozone The method of compressing the ozone generated from the vial with a compressor and forcing it into high pressure waste water to dissolve it is used, or a method of using a dedicated pump called a DAF pump has been studied.

The air flotation method is known to remove floating materials by floating them in contact with microbubbles to remove them.In order to improve the efficiency of the air flotation method, a large amount of air is dissolved at high pressure and injected into the wastewater at atmospheric pressure to obtain ultrafine bubbles. Use a specially designed dissolved air flotation (DAF) pump as a method of improving floating efficiency by removing floating substances, or mix and dissolve high pressure air compressed by a compressor in high pressure waste water pressurized with a pressure pump. The method of injecting into the tank was troublesome using an air compressor or a dedicated DAF pump.

In the present invention, there is an advantage that can use a general pressure pump such as horizontal or vertical multi-stage pump, gear pump, lobe pump without using a separate high pressure compressor and DAF pump to inject ozone or air Wide range and convenient

In the existing high-oxidation process, unreacted ozone is not properly utilized and released into the atmosphere or decomposed by a decomposing device. Thus, the use efficiency of ozone is very low, resulting in increased capacity of the expensive ozone generating device and the unreacted ozone decomposing device. In order to increase the cost and increase the efficiency of the decomposition reaction of contaminants, there was a problem in that the installation and operation costs were increased by increasing the device size of the advanced oxidation process to increase the contact area.

The present invention solves the above problems and maximizes the decomposition efficiency of the advanced oxidation process and the development of unreacted ozone reuse technology to increase the decomposition efficiency of pollutants and minimize the unreacted ozone emission. The present invention relates to a high pressure advanced oxidation process wastewater treatment apparatus using a high pressure photooxidation apparatus 60 equipped with an unreacted ozone reuse system capable of reducing installation costs and operating costs by reducing the size, and a water treatment method using the same.

The existing technologies related to the process of removing pollutants using advanced oxidation processes have neglected the treatment of unreacted ozone, so that most ozone is not properly used, released into the atmosphere, or simply decomposed by the flue gas ozone decomposing unit. As technologies for ozone, the utilization of the ozone produced in the expensive ozone generator is low, and there is a problem in that installation costs and operating costs increase in addition to the problems causing environmental pollution.

According to the present invention, when a large amount of ozone generated in the ozone generator 70 is pressurized at high pressure together with waste water and injected into the high pressure photooxidation apparatus 60 in a dissolved state without bubbles, a large amount of dissolved ozone is contaminated. Oxidative decomposition in contact with water, or ozone decomposition reaction by ultraviolet rays which are free from ozone bubbles, and contaminant decomposition reaction by OH radicals produced by photocatalytic reaction in which ozone is decomposed by photocatalytic reaction. The reaction rate of ozone increases as the decomposition reaction rate of the contaminants increases, and the unreacted ozone remaining without participating in the reaction is a high-pressure reactant in the secondary pretreatment tank 32 and the gas-liquid separation tank 40. Ozone turns into an ultra-fine bubble ozone drop and floats to the top of the floating tank, adsorbing suspended matter and floating it on the water, It is sent to the scum removing part 31d and separated from the scum, and reused by the primary dissolved ozone / air flotation method in which residual ozone is removed by reacting with the contaminant, and the secondary pretreatment tank 32 and the gas-liquid separation injury The unreacted ozone collected to the upper part of the tank 40 is a secondary dissolved ozone / air flotation method, which is pressurized together with the waste water by the high pressure pump 35 in the flotation tank to the first pretreatment flotation tank 31, and the suspended solids of the waste water. While performing a series of unreacted ozone reuse processes to remove contaminants, most of them are removed, and the remaining unreacted ozone is removed from the exhaust gas ozone removal device 50 in accordance with environmental standards, and then discharged to the atmosphere. ) Can be reduced, and pollutant loading of the high pressure photocracking apparatus 60 is reduced, and the pollutant treatment speed of the high pressure photocracking apparatus 60 is reduced. Due to the complex effect of increasing the wastewater treatment capacity due to the increase, the capacity of the expensive ozone generator 50 is reduced, the installation cost and operation cost of the wastewater treatment device are reduced, and the advanced oxidation process wastewater treatment device 100 is compact. The present invention provides a wastewater treatment apparatus using a high pressure advanced oxidation process equipped with an unreacted ozone reuse system and a water treatment method using the same.

In the present invention, the process of reusing unreacted ozone is preheated by contacting the exhaust gas and the influent water to recover the waste heat in a general boiler, and the same concept as removing the heat of the exhaust gas, the pretreatment tank 30 and the gas-liquid Separation flotation tank 40 is characterized in that to remove in advance the suspended solids and contaminants contained in the waste water by the dissolved ozone / air flotation separation by unreacted ozone, in order to achieve the above object, the pretreatment flotation tank (30) ) Is the first pretreatment flotation tank 31 in which unreacted ozone is finally removed by performing a dissolved ozone / air flotation process on the waste water of the waste water storage tank 10; Secondary pretreatment unit containing the wastewater treated with the dissolved ozone / air flotation in the primary pretreatment tank 31 through the transfer line 69 to the high pressure reactant at the outlet 60b of the high pressure photoacidification device 60 It consists of a secondary pre-treatment flotation tank (32) which performs the dissolved ozone / air flotation process by adding the phase (32) to the secondary, and in the same manner, in the gas-liquid separation flotation tank (40), a high-pressure photooxidation reactor (60) Dissolved ozone / air flotation process for wastewater treated by inputting high-pressure reactant into the lower inlet 40a of the gas-liquid separation tank 40 connected to the outlet 60b, thereby remaining uncontaminated ozone in the treated water. Remove by reacting with material.

According to the present invention, the secondary pretreatment tank 32 is connected to a treated water conveying line 69 provided with a high pressure photocatalytic outlet 60b, a flow meter 69a, and a flow control valve 69b. The unreacted ozone removal by dissolved ozone / air flotation is carried out by returning part or all of the high-pressure reactant in which unreacted ozone is dissolved through the water conveying line 69 to the lower inlet 32c of the secondary pretreatment tank. And contaminant removal function, the concentration of the pollutants in the waste water introduced into the system for conveying the reactants of the high-pressure photooxidation unit 60 to the lower portion of the secondary pretreatment tank 32 and the high-pressure photooxidation unit (60). According to the secondary pretreatment tank 32 and the high-pressure photooxidation reaction device 60, the load can be adjusted so as to minimize the impact, and the high-pressure advanced oxidation process can easily operate the initial operation of the first gain.

The ozone introduced into the high pressure advanced oxidation process wastewater treatment system 100 of the present invention is consumed by reaction with most pollutants while undergoing a four-step process, and finally the remaining unreacted ozone is an environmental standard in the exhaust gas ozone removal device 50. It is decomposed and released into the atmosphere. First, the ozone supplied from the ozone generator 70 to the suction port 65a of the photo-oxidation pressurization pump 65 and the second treated wastewater supplied through the lower outlet 39 of the secondary pretreatment flotation tank 32 at 3 atmospheres. The waste water introduced to the high-pressure photooxidation reaction device 60 inlet 60a by pressurization above decomposes pollutants by OH radical generation reaction by photocatalytic decomposition of ozone or decomposes pollutants by oxidation of dissolved ozone. Some of the high-pressure reactants removed through the decomposition process and discharged through the high-pressure photooxidation reaction device 60 and the outlet 60b are connected to the treatment water conveying line 69 to the secondary input treatment tank 32 and the lower inlet 32c. The circulation line 63 connected to the middle of the treated water return line 69 may be a circulation pump 63a and a flow meter 63b and a flow control valve 63c to the inlet port 60a of the high pressure photooxidation reaction device 60. Is connected through the above to understand the circulation pump (63a) Circulating the high pressure reactant after the first reaction through the high pressure photocracking apparatus 60 to repeat the series of photocracking reactions repeatedly to further consume the pollutant decomposition reaction;

Second, the flow meter (64a) and the flow control valve through the high-pressure photochemical reaction device (60) outlet (60b) to the treated water containing the high-pressure unreacted dissolved ozone to the gas-liquid separation tank (40) lower inlet (40a) 64b) is dissolved into ozone bubbles generated as ultra-unreacted ozone bubble droplets, and reacted with residual pollutants as they float upwards in contact with the treated wastewater filled in the gas-liquid separation tank 40. Performing air flotation process;

Third, the secondary pretreatment floats through the photoacidification conveying line 69 provided with the flow meter 69a and the flow control valve 69b through the high pressure photooxidation reactor 60, the outlet 60b. When the treated water is returned to the tank 32, the lower inlet 32c, a supernatant ozone bubble is floated to perform a dissolved flotation process to remove contaminants and unreacted ozone contained in the first-treated wastewater. ;

Fourth, the unreacted ozone collected to the upper portion of the gas-liquid separation tank 40 is supplied to the inlet 35a of the pretreatment flotation tank 35 through the unreacted ozone recycling line 45, and the secondary The unreacted ozone collected to the upper part of the pretreatment flotation tank 32 receives unreacted ozone supplied to the pretreatment flotation pressure pump 35 inlet 35a through the pretreatment unreacted ozone recycling line 36 in the wastewater storage tank 10. The unreacted ozone is dissolved by pressurizing at least 3 atm with the supplied waste water, and then introduced into the lower inlet 31a of the primary pretreatment tank 31 to be consumed while performing the dissolved float process.

In the present invention, the ozone introduced into the high pressure advanced oxidation process wastewater treatment system as described above increases the efficiency of participating in the decomposition reaction of ozone while undergoing a four-stage reaction, thereby minimizing the amount of unreacted ozone and adding only ozone necessary for the contaminant decomposition reaction. Can reduce the size of expensive ozone generators and remove flue gas ozone from the atmosphere compared to the advanced oxidation process that used large-capacity ozone generators. It is characterized by reducing the eliminator load.

The high-pressure photooxidation reaction device 60 is ozone supplied from the ozone generator 70 and the waste water treated twice in the primary and secondary pretreatment tanks 30a and 30b to the photooxidation pressure pump 65. The pressure present in the bubble form is pressurized to a minimum, and the pressure and flow rate of the high pressure photooxidation reaction device 60 are provided at the outlet 60b of the high pressure photooxidation reaction device 60 with a pressure gauge 64b and a flow meter ( It is preferable to adjust by the method of adjusting the rotation speed of the photo-oxidation pressurizing pump 65 at the flow volume determined by 64a) and the flow control valve 64c, and the load control of the said high-pressure photo-oxidation reaction apparatus 60, and the pretreatment flotation tank. (30) A conveying system for conveying a part or all of the treated water to a pretreatment secondary pretreatment tank 32 through a conveying line 69 connected to the outlet 60b of the high pressure photooxidation reaction device 60 in consideration of operation efficiency. It is desirable to be installed . In addition, the treatment water conveying line 69 connected to the outlet 60b of the high-pressure photooxidation reactor 60 is a circulation line 63a provided with a photooxidation circulation pump 63, a flow meter 63b, and a flow control valve 63c. Through the photoacidification device 60 through the lower inlet (60a) is characterized in that the high-pressure photooxidation reaction can be carried out while controlling the degree of photoacidification and the amount of unreacted ozone while refluxing some or all of the high-pressure reactant.

In the present invention, the photocatalyst coating carrier 67 filled in the high-pressure photooxidation reaction device 60 is processed in the form of a coil spring 67a, the diameter of the wire 67b is 0.1 ~ 5mm, the material is stainless steel, A metal material such as titanium or aluminum, the diameter of the coil spring 67a is set to 5 to 70 mm, the shape of the coil spring 67a is elongated, and the pitch of the coil spring 67a is larger than the diameter of the wire 67b. It is made small and the pitch of the starting point and the end of the spring is processed close to the adjacent pitch, so that the coil spring 67a type photocatalyst coating carrier 67 does not overlap with each other when filling the high pressure photooxidation reaction device 60. Increasing the density and sanding the wire surface 67c with gold steel or the like, or corroding it with chemicals such as acid to roughen the wire surface 67c to improve the adhesion of the photocatalyst and improve the surface area of the coated photocatalyst. I can not.

The photocatalyst coating carrier 67 is wound around the wire 67b and processed into a coil spring 67a to roughen the wire surface 67c so as to maintain a large surface area, and then dilute titanium alkoxide in a solvent and coat it at 800 ° C. The photocatalyst coating carrier 67 in which the photocatalyst 67d is firmly adhered to the wire surface 67c by heat treatment at the following temperature is used. The space between the wire 67b and the wire 67b of the coil spring 67a, that is, between the pitches The irradiation between the space and the support of the coil spring 67a is smooth, and the ultraviolet radiation can be reached even at the photocatalyst 67d located relatively far from the quartz tube 61 into which the ultraviolet lamp 62 is inserted. Wastewater containing contaminants can easily pass through to reduce pressure loss, and the surface area and pressure loss are significantly smaller than those used by coating a photocatalyst on a porous plate. In the decomposition reaction efficiency is high, there is an advantage that can increase the processing capacity.

In addition, when the coil spring (67a) type photocatalyst coating carrier 67 is filled in the high-pressure photooxidation reaction apparatus, the coil spring (67a) type photocatalyst coating carrier 67 is compressed by using the elasticity of the spring carrier. Thus, when an empty space is created between the metal photocatalyst coating carrier 67 and the glass quartz tube 61 protecting the ultraviolet lamp 62, the photocatalyst coating carrier 67 is caused to flow by water flow. The problem that the quartz tube 61 is broken by mutual collision is firmly fixed between the photocatalytic coating carriers 67 by the tension of the coil spring 67a so that the quartz tube 61 is not moved even in the flow of water. I can solve it.

Ultraviolet rays emitted from the ultraviolet lamp 62 are vacuum UV that reacts with oxygen by wavelength to generate ozone, UV-C (200-280 nm) that sterilizes and decomposes ozone, and UV- which is mainly used for photocatalytic reactions. Among them, A, B (280 ~ 400nm), UV-C (200 ~ 280nm) is irradiated with dissolved ozone, ozone absorbs ultraviolet light and photolysis to produce hydrogen peroxide (H ₂ O ₂ ) as an intermediate product In addition, it is used for the reaction of decomposing contaminants by OH radicals generated while hydrogen peroxide is decomposed.

In the present invention, the photocatalytic reaction using ultraviolet light is a low or high pressure mercury ultraviolet lamp and UV-C which emit mainly 254 nm wavelength to decompose ozone. To UV-A can be used in the medium-pressure lamp that emits ultraviolet light, but the short wavelength 254nm ultraviolet light only has a penetration of 2 ~ 3mm underwater ozone around the quartz tube 61 is inserted into the ultraviolet lamp 62 Because only the reaction, the hole in the photoacidification of the existing (Registration No. 0541573) ozone bubbles pass around the quartz tube inserted with the ultraviolet lamp, so ozone passes through the ultraviolet lamp to decompose the ozone by the ultraviolet light. By increasing the amount of OH radicals to try to increase the decomposition reaction efficiency of contaminants.

From this point of view, the ultraviolet lamp 62 used in the high pressure advanced oxidation process composed of the high-pressure photooxidation reaction device 60 filled with the photocatalyst coating carrier 67 emits light of various wavelengths ranging from ultraviolet to visible light. When the lamp is used, the reaction of generating OH radicals due to the photocatalytic reaction by UV-C (254 nm) wavelength band with weak transmittance near the quartz tube 61 and at a relatively long distance from the quartz tube 61 is performed. The photocatalytic coating carrier 67 located has a longer wavelength than UV-C and has a relatively better penetration ability in the water, so that ozone is decomposed by photo-oxidation reaction by UV-A and B (280-400 nm) wavelengths that can be reached relatively far. It can be used to generate and decompose pollutants, so that the oxidation of pollutants by increased dissolved ozone, the decomposition reaction of ozone by ultraviolet rays, and the The OH radical generated by ozone decomposition reaction decomposes pollutants, and the reaction of OH radicals generated by ultraviolet light and photocatalysts decomposes water decomposes contaminants. And, in particular, there is an advantage that can maximize the decomposition efficiency of the hardly decomposable material.

In the high-pressure photooxidation reaction device 60, the reaction to ozone may be described in four stages. 1) ozone reacts directly with contaminants; 2) ozone absorbs light with a wavelength of 254 nm to produce OH radicals and reacts with contaminants; and 3) ozone decomposes by UV and photocatalytic reactions. Reaction with contaminants by generating radicals, and 4) ultraviolet light and photocatalysts react to decompose water to generate OH radicals to react with contaminants. Ultraviolet rays required for the 2, 3, and 4 stage reactions can be used for low pressure and high pressure mercury lamps that selectively emit 254 nm wavelength.However, in the 3 and 4 stage photocatalytic reactions, medium pressure mercury lamps with a wide range of ultraviolet emission wavelengths are used. desirable. This is because 254 nm ultraviolet rays with short wavelengths have a problem of having to use a high power lamp to increase the penetration because only a few mm of penetration into the water is possible, and only the region near the quartz tube 61 that protects the ultraviolet lamp 62 can participate in the reaction. There is a drawback to using a lot of UV lamp arrangement closely.

The exhaust gas discharged from the pretreatment process may contain a small amount of ozone. Stratospheric ozone is beneficial because it absorbs harmful ultraviolet rays, but near-ground ozone causes respiratory disease and improves photochemical smog generation through the reaction of VOCs with nitrogen oxides. According to the Occupational Safety and Health Adminstration (OHSA), the allowable exposure for 8 hours is about 0.1 ppm. In the range of 0.1-1 ppm, ozone causes headache, throat dryness and harms the mucous membrane.

Much of the gaseous ozone decomposition is related to catalysts. Photocatalytic decomposition of ozone on TiO2 and decomposition using activated carbon, natural and iron sand, silica gel, alumina, NaCl, calcite, Saharan Sand, wood ash, MnO2, Fe2O3, CuO and others are known. The active components of the decomposition reaction using a catalyst are mainly metals such as Pt, Pd, and Rh and metal oxides including Mn, Co, Cu, Fe, Ni, Ag, etc. The catalyst carriers used are γ-Al2O3, SiO2, TiO2, and activated carbon. And so on. The high price of precious metals has favored the use of metal oxides. Since ozone decomposes at a relatively low temperature, a method in which a quartz-filled reactor is heated to decompose through unreacted ozone is used.

In order to achieve the above object, the wastewater treatment apparatus 100 using a high pressure advanced oxidation process equipped with an unreacted ozone reuse process includes a wastewater storage tank 10 for storing wastewater, and suspended solids and pollutants in the wastewater as unreacted ozone. The pretreatment flotation tank 30 and the pretreatment flotation tank 30 for removing the wastewater are composed of primary and secondary pretreatment flotation tanks 30a and 30b, and the wastewater treated by the pretreatment flotation tank 30. Pressurized to a high pressure photoacidification device (60) to decompose contaminants in a photooxidation reaction by pressurizing at high pressure with a photooxidation pressure pump (65) together with ozone supplied to the ozone generator (70), and the high pressure photooxidation device (60). A circulating pump 63a for conveying a part of the high pressure reactant to the secondary pretreatment tank 32 and circulating the high pressure reactant to the high pressure photoacidification device 60 in the middle of the conveying line 69. ) And flow meter (63b) and oil The control valve 63c is connected to the treated water circulation line 63, and the pressure of the high-pressure reactant of the high-pressure photooxidation reactor 60 is removed and residual contaminants in the treated water are removed by dissolved ozone / air flotation. The gas-liquid separation tank 40 and the unreacted ozone collected above the gas-liquid separation tank 40 are sent to the pretreatment tank pressurization pump 35 and pressurized together with the waste water to carry out the primary pretreatment tank. ) To finally remove the unreacted ozone by the dissolved ozone / air flotation separation method, and send it to the flue gas ozone removal device 50 through the primary pre-treatment floatation tank 31 and the floating tank discharge port 31c. It is characterized in that it comprises a prior to the removal of unreacted ozone below environmental standards.

According to the present invention, in the advanced oxidation process wastewater treatment apparatus 100 using the high-pressure photooxidation and decomposition apparatus 60, the process of reusing unreacted ozone is carried out by the photooxidation pressure pump (65) After decomposing by the high pressure together with the high pressure photooxidation unit (60) by the photooxidation reaction, the unreacted ozone contained in the high pressure reactant is separated by floating ozone / air flotation method to separate the suspended solids in the waste water, The first stage reaction ozone reuse process of the secondary pretreatment tank 32 and the gas-liquid separation tank 40 to remove by reaction, the waste water of the waste water storage tank 10, the secondary pretreatment tank 32 and the gas- Primary pre-treatment to remove suspended substances and contaminants contained in the waste water by dissolving ozone / air flotation by pressurizing the unreacted ozone collected above the liquid separation levitation tank 40 together with the floating tank pressure pump 35. It is composed of a two-step unreacted ozone reuse process of the upper tank 31, the process of reusing the first and second stage unreacted ozone is the pre-treatment flotation tank (31, 32) and the gas-liquid separation tank (40) And a scum removing tank (31d, 32d, 40d) for storing and discharging the scum that has been removed.

The secondary pretreatment flotation tank 32, the lower discharge port 39b is connected to the photo-oxidation pressurized pump 65 through the photo-oxidation wastewater supply pipe 39 in which the flow control valve 39b is installed. It is connected to the ozone generator 70 through an ozone supply line 71 provided with a valve 71c, a flow meter 71b, and a flow control valve 71a, and the photooxidation pressurization pump 65 discharges waste water and ozone to 3 atm. The above-described pressurized ozone-dissolved waste water is supplied to the high-pressure photooxidation reaction apparatus 60, and the high-pressure photooxidation reaction apparatus 60 has an inlet port 60a and an outlet port in a tubular housing 66 having a circular or rectangular cross section. 69b), a quartz tube fixing part 68 for fixing a “U” shaped quartz tube 61 with one end closed to accommodate the ultraviolet lamp 62 therein, and the quartz tube above the housing 66. The fixed portion 68 transfers the outer diameter of the open portion of the “U” shaped quartz tube 61 to the high-pressure photooxidation reaction apparatus 60. In order to maintain tightness and maintain tightness, the inner wall of the quartz tube fixing part 68 is airtight so as to withstand the reaction pressure by using a fluorine resin or an O-ring or a gasket of a silicon system that is not aging by ultraviolet irradiation. Fixed, the quartz tube 61 is installed in the longitudinal direction at the center of the high-pressure photooxidation reaction device 60, the thickness of the quartz tube 61 is preferably at least 2mm so as to withstand the pressure of the high-pressure photooxidation reaction, one or more In the case where it is installed, it is preferable to arrange the quartz tube 61 in the high-pressure photooxidation reaction apparatus 60 so as to maintain the most evenly spaced interval so that the amount of ultraviolet rays is equal. The outer wall of the quartz tube 61 and the internal space of the high-pressure photooxidation reaction device 60 are filled with a photocatalyst coating carrier 67.

In addition, according to the present invention, for controlling the pollutant load of the high-pressure photooxidation reaction device 60 and the reaction time of the waste water of the high-pressure photooxidation reaction device 60, the high pressure of the high-pressure photochemical reaction device 60, outlet 60b Of the treated water conveying line 69 for conveying the reactants of the secondary pretreatment floatation tank 32 to the lower inlet 32c, and the lower inlet of the high-pressure photooxidation reaction device 60 at the middle of the treated water conveying line 69. The treatment water circulation line 63 for circulating the high pressure reactant to 60a) is installed, and each of the flow meters 63b and 69a and the flow control valve 63c and the treatment water return line 69 and circulation line 63 are respectively provided. 69b) is installed, the secondary pretreatment flotation tank 32 is introduced by the pressure of the high pressure reactant itself, and the circulation to the lower inlet port 60a of the high pressure photooxidation reactor 60 is introduced by the circulation pump 63a.

In the present invention, the high-pressure reactant after the reaction in the primary high-pressure photooxidation reactor (60) to convey the high-pressure reactant in the pre-treatment flotation tank and gas-liquid separation flotation tank to remove the suspended matter and contaminants by the dissolved ozone / air flotation method Retention time of the waste water of the photooxidation decomposing device 60 in accordance with the function to remove the contaminants contained in the waste water flowing into the high-pressure photooxidation reactor 60, and to circulate the high-pressure reactant to the mine pollen plant 60 Since the decomposition efficiency of the pollutants can be controlled by controlling the pressure, the operation of the high pressure advanced oxidation process wastewater treatment device 100 using the high pressure photooxidation device 60 can be normally operated against the fluctuations in the pollutant concentration and the throughput of the incoming wastewater. That provides the benefits.

According to the invention, the process of removing the unreacted ozone in the gas-liquid separation flotation 40, the high-pressure reactant discharged through the outlet (60b) of the high-pressure photooxidation reactor 60 is a gas- Discharging the liquid separation buoy (40) to the lower inlet (40a); Dissolved ozone / air flotation process in which ultra-small size of unreacted ozone bubble drops generated by pressure difference rises to the upper part of the treated water filled with gas-liquid separation tank 40 and reacts with the remaining contaminants to be removed. As the contaminants and the unreacted ozone removal reaction proceed, the unreacted ozone remaining after the dissolved ozone / air flotation process is collected from the upper part of the gas-liquid separation tank 40 and sent to the flotation pressure pump 35. After performing the dissolved ozone / air flotation process in the pretreatment flotation tank 31 again, the remaining unreacted ozone is minimized and sent to the exhaust gas ozone removal device to discharge to the atmosphere at a concentration that meets environmental standards.

In addition, according to the present invention, the floating tank pressurizing pump 35 and the high pressure photooxidation pressurizing pump 65 for dissolving unreacted ozone or ozone in the waste water by using a dedicated dissolved air flotation (DAF) pump, or compressed Pressurize ozone with the wastewater and pressurize it with the compressor, and pressurize the wastewater together with the wastewater with a commonly used pressurized pump such as horizontal or multi-stage pumps, gear pumps, piston pumps, loader pumps, and procon pumps. In addition, the adjustment of the amount of dissolved ozone can be controlled by the amount of ozone to be introduced and the pressure to be pressurized, and the solubility of the supplied ozone increases as the reaction pressure increases. It is easy to check.

According to the present invention, the ozone introduced into the high-pressure photooxidation reaction apparatus 60 is smoothly irradiated with ultraviolet rays necessary for the photooxidation reaction by decreasing the amount of ozone in the form of bubbles by increasing the solubility so that the photocatalytic decomposition of ultraviolet light, photocatalyst, and ozone proceeds actively. The amount of OH radicals generated is increased, and the photocatalyst coating carrier 67 filled in the internal space of the photooxidation reaction device 60 is formed between the coil springs 67a and the coil springs 67a in the form of a coil spring 67a. Irradiation of ultraviolet rays and water containing contaminants can easily pass through the space, so the pressure loss is small, and when the coil spring 67a carrier 67 is filled in the high pressure photooxidation reactor 60, the coil spring ( 67a) When the carrier 67 is compressed and filled, there is an effect of being firmly fixed by the spring tension of the filled photocatalyst coated carrier 67, and the quartz tube 61 is broken by the flow of the carrier which is filled by the flow resistance of water. The coil-shaped spring with a carrier of which can prevent the risk of an elastic metallic material is desirable.

Further, according to the present invention, the coil spring 67a carrier has a wire 67b wire diameter of 0.1 to 5 mm, a coil spring 67a diameter of 5 to 70 mm, and a pitch larger than the diameter of the wire 67b used for processing. When the coil spring 67a is filled in the high-pressure photooxidation reaction device 60, the coil springs 67a may be inserted into each other, thereby preventing a problem of lowering the filling rate.

In the high pressure advanced oxidation process wastewater treatment system 100, not only the pollutants contained in the wastewater are decomposed by ozone dissolved in a large amount, and the ozone in the dissolved state is generated by the photooxidation reaction of ultraviolet light and the photocatalyst 67d. It can have high reaction efficiency because it decomposes and reacts with pollutants by strong OH radicals.

According to the present invention, a plurality of ultraviolet lamps 62 may be installed depending on the processing capacity of the high-pressure photooxidation reaction device 60, and the ultraviolet lamps 62 are inside the quartz tube 61 to avoid direct contact with the waste water. It is protected to the inside, and it is arrange | positioned long in the up-down direction in the inside of the said high-pressure photooxidation reaction apparatus 60. The ultraviolet lamp 62 is electrically connected to a power supply panel 80 for supplying electricity, and the ballast system for operating the ultraviolet lamp 62 has means for confirming the operating state from the outside, and the wastewater treatment It is desirable to be able to adjust the output of the ultraviolet lamp by 5 to 120% depending on the flow rate.

It is apparent to those skilled in the art that the present invention is not limited to the embodiments and that various modifications and changes can be made without departing from the spirit of the present invention. Therefore, such modifications or variations will belong to the claims of the present invention. Hereinafter, with reference to the accompanying drawings in accordance with the present invention will be described in detail.

Kimchi factory cabbage pickled brine was compared by the high-pressure advanced oxidation process using the high-pressure photooxidation device (60) of the present invention and the turbidity and COD removal effect of the brine prepared by the normal pressure advanced oxidation process.

(Example)

Fill the reservoir with 20 liters of brine from which debris was removed with a filter, and suction 100 ml / min of ozone-containing gas and 5 liters of brine from the ozone generator (5 g / hour) with a procon pump and pressurize it to 5 atmospheres. And photocatalysts are sent to a photocatalytic device for photocatalytic reaction, and the discharged high-pressure reactant is circulated 100% to the bottom of the brine reservoir to reuse unreacted ozone by dissolved ozone / air flotation, and the scum floated to the upper air of the reservoir. It is removed while exiting the outlet and air, and in case of atmospheric pressure oxidation, only the pressure is changed to normal pressure and the other conditions are the same, and the brine is collected by time to measure COD and turbidity. The initial COD was 410ppm, and the turbidity was 21. The brine effluent was purified, and the difference between the advanced oxidation process using the high pressure photooxidation reaction and the conventional atmospheric pressure oxidation process was shown as shown in Fig. 4.

At the rear end of the primary pretreatment tank 31 and the high-pressure photooxidation reaction device 60, a digital pressure gauge (36a, 64b) with a built-in pressure sensor capable of transmitting an analog or digital signal, and a floating tank pressure pump (35) capable of adjusting the rotation speed And an acidification pressurization pump 65 and flow control valves 34c and 64c operated by a pneumatic or electric motor, which directly influence the dissolved amount of gas ozone and the floating capacity of the dissolved ozone / air flotation method. In adjusting the pressure of the pressure pump 35 and the high pressure photooxidation reaction device 60, the discharge flow rate is fixed and the rotational speeds of the floating tank pressure pump 35 and the photooxidation pressure pump 65 are interlocked with a set pressure. It is preferable to adjust by the method. In addition, it is desirable to be able to directly check the degree of dissolution of ozone by installing the area flow meters (34a, 64a) that can observe the amount of gas contained in the fluid.

The photocatalyst coating carrier 67 filled in the space between the quartz tube 61 having the ultraviolet lamp 62 embedded therein and the photooxidation reactor housing 66 inside the high-pressure photooxidation reactor 60 is empty and is disposed between the spring pitches. It is an egg-shaped coil spring (67a) shape that can be irradiated with ultraviolet radiation and reactants flow into the space without pressure loss, and the photocatalyst is compressed by using the coil spring (67a) tension when charging the inside of the high-pressure photooxidation reactor 60 The coating carrier 67 is fixed without being shaken by the blur of the fluid, which can prevent the breakage of the quartz tube 61 due to the collision between the photocatalyst coating carrier 67 and prevent the loss of the coated photocatalyst 67d. have. In addition, the high pressure photooxidation reaction apparatus 60 filled with the coil spring 67a-shaped photocatalyst coating carrier 67 has a large effective reaction surface area where the photocatalyst carrier is arranged in a three-dimensional structure and irradiated with ultraviolet rays.

However, in the case where the photocatalyst mentioned in Korean Patent No. 551573 is coated on the porous plate, if the hole perforated in the plate is small, the surface area becomes wider to increase its activity, but if the pressure loss increases, the processing capacity cannot be increased. The pressure loss is small but the reaction surface area is low, the activity is low.

According to the present invention, the photocatalyst coating carrier 67 can be evenly charged in three dimensions inside the high-pressure photooxidation reaction device 60, the pressure loss while increasing the packing density by filling a large number of photocatalyst coating carrier 67 The surface of the coil spring 67a is coated with a photocatalyst 67d precursor on an outer surface 67c of which the surface of the coil spring 67a is roughened by a chemical such as sanding or acid. Photocatalytic decomposition by increasing the adhesion between the photocatalyst and photocatalyst (67d) and increasing the surface area by the rough outer surface (67c) and increasing the frequency of photocatalytic reactions with pollutants in dissolved ozone and wastewater. By increasing the reaction efficiency it is possible to increase the waste water decomposition reaction efficiency.

The present invention relates to a wastewater treatment apparatus for a high pressure advanced oxidation process using a photooxidation reaction of ozone, photocatalyst and ultraviolet light, and a water treatment method using the same. More specifically, the present invention exists in the form of a bubble due to low solubility in water in a conventional atmospheric pressure advanced oxidation process. To solve the problem that ozone has low contact efficiency with contaminants, when ozone is converted to high pressure by dissolving a large amount of ozone, the contact efficiency between contaminants and ozone is good. In addition, the rate of decomposition of pollutants increases due to the increase in the generation of OH radicals, which are strongly oxidized by the photooxidation reaction of ultraviolet rays and ozone. Flotation of Floating Substances in Wastewater by Dissolved Ozone / Air Flotation Separation Method Unreacted ozone reuse process that removes contaminants increases the use efficiency of ozone, greatly reducing installation and operation costs by reducing the size of advanced oxidation process wastewater treatment equipment and expensive ozone generators. The system can be compact, so that it is difficult to secure a place for expanding wastewater treatment facilities, such as urban buildings, factories, apartments, and public facilities, or the water treatment system in places where existing biological treatment methods cannot be used due to odors and aesthetics. And high pressure advanced oxidation process equipped with unreacted ozone reuse system that can effectively treat water purification plant, golf course, landfill leachate, etc., which increase inflow of hardly decomposable substances such as detergent, pesticide, toxic substance, etc. Provided is a wastewater treatment apparatus using the same and a water treatment method using the same.

Claims (8)

In the high pressure advanced oxidation process wastewater treatment apparatus using a high pressure photooxidation apparatus equipped with an unreacted ozone reuse process, And pressurizing the waste water to be treated with the ozone generated by the ozone generator 70 at a high pressure with a photooxidation pressure pump 65, and a high pressure photooxidation reactor 60 for decomposing contaminants of the pressurized waste water into a photooxidation reaction; The high-pressure reactant of the high-pressure photooxidation reactor 60 is introduced into the first treatment waste water of the secondary pretreatment tank 32 and the treated water of the gas-liquid separation tank 40 to dissolve suspended substances and contaminants. The unreacted ozone primary reuse process to remove by DOF (Dissolved Ozone / Air Flotation), and the unreacted ozone collected to the secondary pre-treatment tank 32 and the gas-liquid separation tank 40 The contained gas is pressurized at high pressure together with the waste water supplied from the waste water storage tank 10 in the floating tank pressurizing pump 35 to pressurize the waste water of the primary pre-treatment flotation tank 31 introduced from the waste water storage tank 10 to the dissolved ozone / air injury. Process the suspended solids and Unreacted ozone secondary reuse process for removing contaminants and exhaust gas ozone removal device 50 for decomposing residual unreacted ozone exiting the primary pretreatment tank 31 are installed. The high pressure advanced oxidation process wastewater treatment apparatus using the high pressure photooxidation apparatus provided with the water and the water treatment method using the same. The method of claim 1, wherein unreacted ozone for removing suspended solids and contaminants in wastewater by using dissolved ozone / air flotation using unreacted ozone and air mixture gas is carried out in primary and secondary pretreatment tanks (30a, 30b). ) And gas-liquid separation flotation tank 40, and the dissolved ozone / air flotation separation method of the secondary pretreatment flotation tank 32 and the gas-liquid separation flotation tank 40 may be performed by the acidification pressurization pump 65. Secondary pretreatment tank (32) containing waste water and gas-liquid separation tank containing treated water are the high pressure reactant discharged to the outlet (60b) after the ozone and waste water pressurized by the high pressure photooxidation reactor (60). (1) unreacted ozone reuse process for removing contaminants by dissolving ozone / air flotation by dissolution method and remaining discharged from the secondary pretreatment tank (32) and gas-liquid separation tank (40). Pressurize the floating tank by collecting unreacted ozone Pressurize the wastewater from the primary pre-treatment floatation tank (31) with dissolved ozone / air flotation to remove suspended solids and contaminants by pressurizing the wastewater from the wastewater storage tank (10) to at least 3 atm (35). Primary and secondary pretreatment units comprising a reaction ozone reuse process and scum discharge ports 32, 33, and 44 for separating and discharging scum that float to the surface in the first and second unreacted ozone reuse processes. High pressure advanced oxidation process waste water treatment apparatus and water treatment method using the same, characterized in that the upper tank (30a, 30b) and gas-liquid separation floating tank (40) is installed. The floating tank pressurization according to claim 1, wherein the unreacted ozone collected in the primary pretreatment flotation tank 32 and the gas-liquid separation flotation tank 40 is pressurized together with the waste water for reuse by the dissolved ozone / air flotation separation method. The pump 35 and the photooxidation pressurizing pump 65 for pressurizing the ozone supplied from the ozone generator 70 and the wastewater treated in the secondary pretreatment tank 32 may suck unreacted ozone or ozone together with the wastewater. Horizontal or vertical multistage pump to pressurize, or any one of a lobe pump, a gear pump, a procon pump, the pressure control of the floating tank pressure pump 35 and the highly oxidizing pressure pump 65 to fix the flow rate , High pressure advanced oxidation process wastewater treatment apparatus and water treatment method using the same, characterized in that for controlling the set pressure by adjusting the number of rotation of the pressure pump. According to claim 1, wherein the high-pressure photocracking apparatus 60 for performing a photocracking reaction at a high pressure is a tubular housing 66 having a square or circular cross-sectional shape, the housing 66 is made of stainless steel or titanium, photooxidation A lower inlet 60a connected to the pressure pump 65, an upper outlet 60b connected to the treated water return line 69, and a gas-liquid separation tank 40, and an ultraviolet lamp on the upper portion of the housing 66. It consists of a quartz tube fixing part 68 for fixing the "U" shaped quartz tube 61 to accommodate and protect the inside (62), the housing 66 is a quartz tube 61 of the housing 66 High pressure high oxidation process, characterized in that at least one is installed in the longitudinal direction, the high-pressure photooxidation device 60 is filled with a photocatalytic coating carrier 67 in the quartz tube 61 and the housing 66 interior space. Wastewater treatment device and water treatment method using the same. According to claim 1, wherein the high-pressure photochemical reaction device 60, the flow meter 63b and the flow control valve 69c in the treated water conveying line 69 for conveying the high-pressure reactant to the secondary pretreatment tank through the upper outlet 60b. And a circulation pump 63a are connected to the lower inlet port 60a of the photo-oxidation reaction apparatus 60 through the circulation line 63, and a part or all of the treated water returned through the treatment water conveying line 69 is transferred. High pressure advanced oxidation process waste water treatment apparatus and a water treatment method using the same, characterized in that to control the efficiency of the photolysis decomposition of waste water by circulating back to the high pressure photooxidation reaction device (60). The UV lamp 62 is a low pressure or high pressure mercury ultraviolet lamp mainly emitting UV-C (254 nm) wavelength band or a medium pressure UV lamp emitting UV rays in the UV-A, B, C wavelength band. High-pressure advanced oxidation process wastewater treatment apparatus and water treatment method using the same, characterized in that the lamp 62 is turned on with a single output, or a ballast system that can variably adjust the output of the ultraviolet lamp 62 to 5 ~ 120%. The method according to claim 1 and 3, wherein the photocatalyst coating carrier 67 has a coil spring 67a shape in processing the wire 67b made of stainless steel or titanium with a diameter of 0.1 to 5 mm in the form of a coil spring 67a. The length of the spring is smaller than the diameter of the wire 67b, and the pitch of the start point and the end of the spring is close to the adjacent pitch so that the coil spring 67a carriers do not overlap each other during filling. And a sanding step of roughening the wire surface 67c by colliding the wire 67b with sand or gold steel with high pressure air, and a step of coating titanium alkoxide and heat-treating the temperature below 800 ° C. High pressure advanced oxidation process wastewater treatment apparatus and water treatment method using the same, characterized in that using the prepared photocatalyst coating carrier (67). The method of claim 1, wherein the ozone removing device 50 is filled with any one of activated carbon, metal mesh, metal coil spring coated with a photocatalyst around the ultraviolet lamp installed in the center of the stainless steel tube through which unreacted ozone passes. The photocatalytic decomposition method decomposes and removes unreacted ozone by photocatalytic reaction by irradiating ultraviolet rays to the photocatalyst, or inside a tube made of quartz or stainless steel through which unreacted ozone passes, and has a diameter of 5 to 30 mm. Fill a hollow cylindrical quartz or stainless steel tube with a thickness of 1 to 3 mm, or laminate and fill a mesh machined from stainless steel wire with a diameter of 2 mm or less, and use a heating wire capable of temperature control. High-pressure advanced oxidation process wastewater treatment apparatus, characterized in that ozone ozone removal device is installed to pyrolyze by heating with Water treatment method using this.

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