KR100464837B1 - A ozonize filtration type waste water process method and a waste water disposal apparatus thereof - Google Patents

Abstract

The present invention provides an ozone filtration water treatment method and apparatus for treating various contaminants contained in the effluent and simplifying the treatment process and treatment facilities to reduce the installation space and processing time, as well as the cost of equipment and operation. It is to. Accordingly, the ozone filtration water treatment method includes a pre-coating process in which a coating liquid in which a filtration aid is mixed with a cleaning liquid is coated on the surface of the filter element of the filter chamber; Filtration that rapidly oxidizes and removes colloidal microparticles, organic compounds, and inorganic substances by mixing ozone and hydrogen peroxide in the effluent supplied into the filter chamber and filtering solids by the filter element and oxidizing ozone and hydrogen peroxide. And an oxidation process; An ozone removal process in which ozone contained in the filtered water generated by the filtration and oxidation process is removed to generate purified water; A backwashing step of removing the slurry of foreign matter, filter aid and the like generated in the filter chamber in the filtration and oxidation process and washing the filter element such that the pre-coating step is repeatedly performed; It comprises a dehydration step of solid and liquid separation of the slurry generated in the backwashing step.

The ozone filtration water treatment device includes: a filter chamber 110 having a filter element embedded therein to remove foreign substances in the effluent; A main pump (170) installed on the discharge water supply pipe for pumping the discharge water into the filter chamber; A coating liquid manufacturing means (120) pressurized in the filter chamber by the main pump to input and mix a predetermined amount of auxiliary filter agent and a cleaning liquid to form a pre-coating layer on the filter element; An ozone and hydrogen peroxide supply device 130 configured to mix and supply ozone and hydrogen peroxide on a supply pipe of the effluent water supplied into the filter chamber in which the precoating layer is formed; A purified water tank 140 including an ozone discharge device configured to store the separated filtrate in the filter chamber and discharge ozone contained in the filtered water; A slurry tank (150) positioned below the filter chamber to discharge and store the slurry separated by the filter element; A dewatering device (160) in which the slurry pumped from the slurry tank by the slurry supply pump is solid and liquid separated; Compression connected to the filter chamber and the dehydrator, the coating liquid manufacturing means, the purified water tank, and the slurry tank, respectively, to supply compressed air under the control of a controller to perform the functions of discharge of slurry and cake, mixing of auxiliary filters, and aeration. An air supply device 180 is included.

Description

OZOON FILTRATION TYPE WASTE WATER PROCESS METHOD AND A WASTE WATER DISPOSAL APPARATUS THEREOF

The present invention relates to a method and apparatus for treating ozone filtration, and more particularly, an oxidation process by ozone and hydrogen peroxide is performed at the same time as filtration during treatment of effluent water, and various treatments and treatment facilities are treated. The present invention relates to an ozone filtration water treatment method and apparatus for simplifying installation space and treatment time, as well as lowering installation and operating costs.

As social demand for water recycling increases due to lack of water resources and water pollution, water treatment facilities that filter suspended matters in raw water cannot meet these social requirements or legislated environmental standards, Since water quality cannot be guaranteed, various water treatment facilities have recently been researched and developed.

In addition, suspended solids can be removed in water treatment by conventional filtration, but colloidal particulates, organic compounds, inorganic substances, heavy metals, etc. cannot be removed at all, so ozone water treatment method using strong oxidizing power of ozone or hydrogen peroxide as its application method. Oxidation promotion methods using UV and the like combined with ozone have been used.

For example, the conventional ozone water treatment device is subjected to ultrasonic oxidative decomposition by the ultrasonic generator (2) to the discharged water stored in the water collecting tank (1) registered in Korea Utility Model Publication (Registration No .: 20-0173545) or as shown in FIG. After conducting the first settling treatment in the metal sedimentation separator (4) through the good quality mixing device (3), the secondary treated water is treated in the oil and water separator (5) and the ozone advanced treatment tank (6). Ozone treatment is carried out to the), and the residual sludge generated in this process is dewatered by the dehydration device (7).

However, in the conventional water treatment method as described above, since the ozone treatment process is performed after the filtration process is performed first, each reaction tank is required, and its structure is complicated, and the collection tank, the metal sedimentation separator, the oil water separator, and the ozone advanced treatment tank are It is a device that requires excessive installation space and processing time, and at the same time, a device that requires a lot of operating costs, has a problem of low efficiency in water treatment and cannot be applied to a small unit.

In recent years, ultra-filters, nano-filters, and reverse osmosis membranes, which can separate foreign substances from electronics, pharmaceuticals, and chemical plants, are used, but such ultrafiltration filters membrane contamination index of wastewater and wastewater through several stages of pre-filters. Since the conditions to be suitable for the need to be made, there is a problem that the pretreatment facilities are increased and the equipment costs and operating costs are increased.

The present invention is to solve the above problems, its purpose is to simplify the treatment process and treatment facilities while treating various contaminants contained in the effluent not only reduce the installation space and processing time but also equipment cost and operation cost It is an object of the present invention to provide an ozone filtration water treatment method and apparatus for reducing the cost.

In order to achieve the above object, in the ozone filtration water treatment method according to the present invention, in the filtration method using the filter element and the effluent water treatment method using the oxidizing power of ozone and hydrogen peroxide, the coating liquid mixed with a filter aid in a clean liquid is pressurized filter chamber A pre-coating process in which a pre-coating layer is formed on the surface of the filter element; Ozone and hydrogen peroxide are mixed with the effluent supplied into the filter chamber in which the pre-coating layer is formed, and the oxidative action of the ozone and hydrogen peroxide at the same time as the filtration process of the solids is rapidly oxidized to colloidal fine particles, organic compounds, and inorganic substances. Filtration and oxidation process to remove and produce filtered water; An ozone removal process in which ozone contained in the filtered water generated by the filtration and oxidation process is removed to generate purified water; A backwashing step of removing the slurry of foreign matter, filter aid and the like generated in the filter chamber in the filtration and oxidation process and washing the filter element such that the pre-coating step is repeatedly performed; It characterized in that the dehydration step of solid, liquid separation of the slurry generated in the backwashing step.

Preferably, the liquid separated in the dehydration process is supplied and reprocessed in a filtration and oxidation process, the filter aid used in the pre-coating process is diatomaceous earth, the cleaning liquid mixed in the filter aid and the wash water used in the backwashing process Is purified water produced by the ozone removal process.

In addition, the ozone filtration water treatment apparatus for achieving the object of the present invention is a filtration using a filter element and the effluent treatment apparatus using the oxidizing power of ozone and hydrogen peroxide, the filter chamber with a filter element built therein to remove the foreign matter in the effluent; ; A main pump installed on the discharge water supply pipe for pumping the discharge water into the filter chamber; A coating liquid manufacturing means which is fed into the filter chamber by the main pump to feed and mix a predetermined amount of auxiliary filter agent and a cleaning liquid to form a pre-coating layer on a filter element, thereby forming a coating liquid; An ozone and hydrogen peroxide supply device configured to mix and supply ozone and hydrogen peroxide on a supply pipe of effluent water supplied into a filter chamber in which a pre-coating layer is formed; A purified water tank configured to store the separated filtrate in the filter chamber and to discharge an ozone contained in the filtrate; A slurry tank positioned below the filter chamber to discharge and store the slurry separated by the filter element; A dewatering device in which the slurry fed from the slurry tank by the slurry supply pump is solid and liquid separated; Compression connected to the filter chamber and the dehydrator, the coating liquid manufacturing means, the purified water tank, and the slurry tank, respectively, to supply compressed air under the control of a controller to perform the functions of discharge of slurry and cake, mixing of auxiliary filters, and aeration. Characterized in that configured to include an air supply.

1 is a schematic configuration diagram showing a conventional ozone water treatment apparatus,

2 is a schematic process chart showing an ozone filtration water treatment method according to the present invention;

3 is a block diagram showing an ozone filtration water treatment apparatus according to the present invention,

4 is a view showing a detailed configuration of FIG.

5 is an enlarged view of a portion A of FIG. 4.

* Description of the symbols for the main parts of the drawings *

110: filter chamber, 120: coating liquid production means,

130: ozone and hydrogen peroxide supply device, 140: purified water tank,

150: slurry tank, 160: dehydrator,

170: main pump, 180: compressed air supply device.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a schematic process chart showing the ozone filtration water treatment method according to the present invention.

The ozone filtration water treatment method according to the present invention includes a pre-coating process 10 in which a coating layer is formed on a filter element of a filter chamber in which effluent is to be filtered, as shown in FIG. 2, and in a filter chamber in which a coating layer is formed. Filtration and oxidation process 20 is performed at the same time the filtration and oxidation process of the discharged water, and ozone removal process 30 to remove the ozone contained in the filtered water produced by the filtration and oxidation process 20 to generate purified water (30) And, backwashing process 40 for removing the slurry of foreign matter, filtration aids and the like generated in the filter chamber in the filtration and oxidation process 30 and washing the filter element so that the pre-coating process 10 is repeatedly performed, and the The dehydration process 50 which solid-liquid-separates the slurry generate | occur | produced in the backwash process 40 is comprised.

In the pre-coating step 10, a predetermined amount of a clean liquid and a filter aid are introduced into the mixing tank to form a coating liquid by mixing, such as aeration and agitation, and the coating liquid thus formed is transported to the filter chamber to be discharged to filter the filter chamber. To form a pre-coating layer on the surface of the filter element, diatomaceous earth is used as the filter aid, and the feeding time is about 10 to 15 minutes.

In the filtration and oxidation process 20, the effluent is pumped into the filter chamber in which the pre-coating layer is formed on the filter element, and the effluent is mixed with a certain amount of ozone and hydrogen peroxide to simultaneously filter the solids by the filter element. Oxidation of hydrogen peroxide removes colloidal microparticles, organic compounds, and minerals by rapid oxidation, ie adsorption and filtration by diatomaceous earth coated on the filter element and oxidation by ozone and hydrogen peroxide Phenol, cyanide, heavy metals, nitrogen and phosphorus dissolved in the discharged water are removed, color, deodorization, sterilization function are performed, and COD and BOD are reduced while fine suspended solids (SS) of 0.5 µm or more are collected in the filter element and 0.5 Colloidal microparticles, organic compounds and inorganic substances of less than μm are rapidly absorbed by ozone and hydrogen peroxide. It is removed by one oxidation.

In addition, since oxidization by ozone and hydrogen peroxide is simultaneously performed during the filtration process by the filter element, concentration polarization due to colloidal fine particles and ionized dissolved substances is suppressed, thereby extending the cycle of the backwashing process, thereby increasing the filtration efficiency. .

On the other hand, the filtered water produced by the filtration and oxidation process is introduced into the purified water tank, the ozone contained in the filtered water is removed by the ozone removal process that is completely decomposed by high temperature treatment by the ozone discharge device installed in the purified water tank. The slurry generated in the filtration and oxidation process is discharged to a collecting container such as a slurry tank by a backwashing process, and dewatered by a dehydration apparatus such as a filter press. The slurry is separated and separated in the dehydration process. The recovered liquid is fed and reprocessed by filtration and oxidation.

The cleaning liquid mixed in the filter aid and the wash water used in the backwashing process are purified water generated by the ozone removal process, and the backwashing process is configured to discharge the slurry by supplying compressed air into the filter chamber.

Figure 3 is a block diagram showing an ozone filtration water treatment apparatus according to the present invention, Figure 4 is a view showing a detailed configuration of Figure 3, Figure 5 is an enlarged view of portion A of FIG.

As a result, the ozone filtration water treatment apparatus is provided with a filter chamber 110 having a filter element therein so as to remove foreign substances in the effluent, as shown in FIGS. 3 and 4, and effluent supply for pumping the effluent in the filter chamber 110. The coating liquid manufacturing means 120 is pumped into the filter chamber by the main pump 170 installed on the pipe, and a predetermined amount of auxiliary filter agent and a cleaning liquid are added and mixed to form a pre-coating layer on the filter element. And an ozone and hydrogen peroxide supply device 130 configured to mix and supply ozone and hydrogen peroxide on a supply pipe of the effluent water supplied into the filter chamber 110 in which the pre-coating layer is formed, and separated from the filter chamber 110. A purified water tank 140 in which the filtered water is stored and the ozone discharge device 142 configured to discharge ozone contained in the filtered water is configured.

In addition, the slurry tank 150 and the slurry supply pump to store the slurry discharged and positioned in the lower portion of the filter chamber 110 so that the slurry generated during the filtration and oxidation process performed in the filter chamber 110 is processed; 152 is a dewatering device 160 that the slurry is pumped from the slurry tank 150, the liquid is separated.

The filter chamber 110 and the dewatering device 160, the coating solution manufacturing means 120, the purified water tank 140, the slurry tank 150 are respectively connected to the discharge of slurry and cake, mixing of the auxiliary filter, aeration, etc. Compressed air supply device 180 for supplying compressed air under the control of a controller (not shown) is performed so that the function of the.

The coating liquid manufacturing means 120 is a mixing tank 122 into which the clean liquid and the auxiliary filter are added and mixed, and a storage container in which the auxiliary filter agent is stored above the mixing tank 122.

124 and a supply device 126 positioned below the storage container 124 to supply a predetermined amount of filter aid on the mixing tank 122, wherein the supply device 126 is composed of a screw conveyor. do.

As shown in FIGS. 4 and 5, the ozone and hydrogen peroxide supply device 130 includes a hydrogen peroxide tank 131 for storing hydrogen peroxide at a constant pressure, an ozone generator 136 for generating ozone, and the hydrogen peroxide tank 131. And the injector 137 installed on the effluent supply pipe so that the hydrogen peroxide and ozone supplied from the ozone generator 136 are mixed with the effluent and at the same time the mixed gas is refined to promote dissolution and reaction. The hydrogen peroxide supply pump 132, the automatic valve 133, the manual valve 134, the flow control valve 135 and the check valve 138 which are installed in order on the pipe connected between the hydrogen peroxide tank 131, and the While the automatic valve 133, the manual valve 134, the flow control valve 135, the check valve 138 are sequentially installed on the pipe connected between the injector 137 and the ozone generator 136, The hydrogen peroxide tank 131 and The manual valve 139 is installed at a portion where the ozone generator 136 side pipes are connected to each other and connected to the injector 137.

The dehydrator 160 is separated and removed in the form of cake (Cake) of the solids contained in the slurry that is conveyed in a state in which a plurality of pads with the elements covered therein are in contact with each other and the liquid separated in this process is again treated with effluent water It consists of a conventional filter press (Filter press) configured to be circulated to.

The compressed air supply device 180 is a pipe connected from a compressed air source such as a compressor 181 is connected to each device, as shown in Figure 4 mixing tank for aeration for mixing the filter aid and clean water ( The mixing tank side connecting pipe 182 connected to the bottom of 122 and configured with an automatic valve, a manual valve and a check valve, and an air unit 183 for discharging the slurry in the backwashing process performed in the filter chamber 110. And a filter chamber side connection pipe 185 configured with an air tank 184, an automatic valve, and a check valve, a slurry tank side connection pipe 186 configured on the slurry tank 150 side for aeration of the slurry, and a filter press. Filter press side connection pipe 187 connected to the filter press to remove foreign substances attached to the element, and purified water for supplying compressed air used for aeration for treatment of ozone in the purified water tank. The tank side connection pipe 188 is comprised.

Further, the purified water tank 140 and the mixed tank 122 and the filter chamber so that the purified water of the purified water tank 140 may be used as the clean water and the filter element 112 to the filter chamber 110 to be supplied to the mixing tank 122. Between the 110 is a purified water supply pipe 144 is configured.

On the other hand, the ozone discharge device 142 configured in the upper portion of the purified water tank 140 is supplied to the inside of the filter chamber 110 for the oxidation reaction of the discharged water to induce alveoli of the human body when the unreacted ozone is released into the atmosphere As the ozone treatment apparatus for solving such problems, such as an activated carbon contact method, a pyrolysis method, a chemical cleaning method, and a catalytic method, but the present invention is a pyrolysis that is rapidly decomposed at high temperature and reduced to oxygen in the present invention. It is configured as a device by the method, such an ozone discharge device 142 is also configured in the slurry tank 150 to remove the ozone contained in the slurry discharged to the slurry tank in the filter chamber.

In addition, reference numeral 146, which is not described, is a purified water supply pump for supplying purified water to a receiving side, and each valve is provided with various valves for controlling and controlling the flow of material flowing through the corresponding pipe. Functions are common in the art and thus detailed descriptions thereof will be omitted.

On the other hand, when the operation of the ozone filtration water treatment device configured as described above will be described with reference to Figure 4, first mixing the purified water (purified water) supplied from the purified water tank 140 before the discharged water to the main pump 170 mixed tank 122 ) And at the same time a suitable amount of auxiliary filter (diatomaceous earth) in the storage container 124 by using the supply device 126 to aerated as compressed air to prepare a mixed coating solution and then operate the main pump 170 A precoat layer is formed on the filter element 112 in the filter chamber 110.

As such, when the pre-coating layer is formed on the filter element, the coating liquid is blocked and the effluent is supplied by the main pump. At this time, the hydrogen peroxide tank 131 supplies hydrogen peroxide to the injector 137 and is generated from the ozone generator 136. When the supplied ozone is supplied to the injector 137, hydrogen peroxide and ozone are mixed in the discharged water and the mixed gas is refined to promote dissolution and reaction. The hydrogen peroxide and ozone supplied into the filter chamber 110 are thus supplied. Is reacted with H ₂ O to generate OH radicals, and reacts directly and indirectly with colloidal fine particles, organic compounds, and inorganic substances contained in the effluent and performs oxidation. Accordingly, phenol, cyan and heavy metals dissolved in the effluent are performed. , Nitrogen and phosphorus are removed, color, deodorization and sterilization are performed, and COD and BOD are reduced while 0.5㎛ Fine suspended solids (SS) are trapped in the filter element 0.5㎛ colloidal fine particles and the organic compound and the inorganic material the following is removed by rapid oxidizing action of ozone and hydrogen peroxide.

In this process, the filtered water is introduced into the purified water tank 140, and when the filtration pressure is increased in the process of performing the filtration and oxidation process in the filter chamber 110, a preset pressure sensor (not shown). As the pressure is sensed and applied to the control unit, the backwashing process is performed, that is, the valve 114 of the lower part of the filter chamber 110 is opened and the compressed air is supplied from the upper part of the filter chamber. The slurry is discharged to the slurry tank 150, and the washing water supplied from the purified water tank 140 washes the filter element 112.

When the backwashing process is completed, the pre-coating process, filtration and oxidation process of coating the coating liquid on the filter element is performed again, and the slurry introduced into the slurry tank 150 by the backwashing process is slurry pump 152. It is pressurized by the filter press, solids are discharged in a cake state as the liquid is separated, and the liquid is again supplied to the treatment process of the effluent.

On the other hand, ozone contained in the filtered water sent to the purified water tank 140 is subjected to ozone treatment by the ozone discharge device 142 to be decomposed and discharged to generate purified water.

According to the ozone filtration water treatment method and apparatus according to the present invention as described above, since the filtration and oxidation is carried out at the same time in the filter chamber, the water treatment equipment becomes compact (Compact) to be conveniently applied to various places without limitation to the installation space It is a very useful invention that can be used, the treatment time is shortened to improve the effluent treatment efficiency, as well as the equipment cost and operating cost.

Since the effluent is treated by the action of the filtration aid, hydrogen peroxide and ozone, various pollutants can be removed. Since the treatment process is a no-discharge system, the water is highly recycled and thus suitable for heavy water use. In the filtration process, colloidal fine particles and ionized dissolved substances are oxidized by the oxidizing action of ozone and hydrogen peroxide, thereby suppressing concentration polarization generated in the filter element and extending the backwash cycle. .

Claims (5)

In the filtration method using the filter element and the effluent treatment method using the oxidizing power of ozone and hydrogen peroxide, A pre-coating step in which the coating liquid in which the filtration aid is mixed with the cleaning liquid is conveyed to form a pre-coating layer on the surface of the filter element of the filter chamber; Ozone and hydrogen peroxide are mixed with the effluent supplied into the filter chamber in which the pre-coating layer is formed, and the oxidative action of the ozone and hydrogen peroxide at the same time as the filtration process of the solids is rapidly oxidized to colloidal fine particles, organic compounds, and inorganic substances. Filtration and oxidation process to remove and produce filtered water; An ozone removal process in which ozone contained in the filtered water generated by the filtration and oxidation process is removed to generate purified water; A backwashing step of removing the slurry of foreign matter, filter aid and the like generated in the filter chamber in the filtration and oxidation process and washing the filter element such that the pre-coating step is repeatedly performed; Ozone filtration water treatment method characterized in that the dehydration step of solid and liquid separation of the slurry generated in the backwashing step. The method of claim 1, The liquid separated in the dehydration process is supplied and reprocessed by filtration and oxidation process, and the filter aid used in the pre-coating process is diatomaceous earth, and the cleaning liquid mixed in the filter aid and the wash water used in the backwashing process are ozone removed. Ozone filtration water treatment method characterized in that the purified water produced by the process. In the effluent treatment apparatus using the filter element and the oxidation power of ozone and hydrogen peroxide, A filter chamber having a filter element embedded therein to remove foreign substances in the effluent; A main pump installed on the discharge water supply pipe for pumping the discharge water into the filter chamber; A coating liquid manufacturing means which is fed into the filter chamber by the main pump to feed and mix a predetermined amount of auxiliary filter agent and a cleaning liquid to form a pre-coating layer on a filter element, thereby forming a coating liquid; An ozone and hydrogen peroxide supply device configured to mix and supply ozone and hydrogen peroxide on a supply pipe of effluent water supplied into a filter chamber in which a pre-coating layer is formed; A purified water tank configured to store the separated filtrate in the filter chamber and to discharge an ozone contained in the filtrate; A slurry tank positioned below the filter chamber to discharge and store the slurry separated by the filter element; A dewatering device in which the slurry fed from the slurry tank by the slurry supply pump is solid and liquid separated; Compression connected to the filter chamber and the dehydrator, the coating liquid manufacturing means, the purified water tank, and the slurry tank, respectively, to supply compressed air under the control of a controller to perform the functions of discharge of slurry and cake, mixing of auxiliary filters, and aeration. Ozone filtration water treatment device, characterized in that configured to include an air supply. The method of claim 3, wherein The coating liquid manufacturing means includes a mixing tank into which the clean liquid and the auxiliary filter are added and mixed, a storage container positioned above the mixing tank to store the auxiliary filter agent, and a predetermined amount of filtration on the mixing tank located below the storage container. Consisting of a supply device for supplying auxiliary materials, The ozone and hydrogen peroxide supply device is a hydrogen peroxide tank in which hydrogen peroxide at a constant pressure is stored, an ozone generator for generating ozone, and the hydrogen peroxide and ozone supplied from the hydrogen peroxide tank and ozone generator are mixed with the discharged water at the same time to be finely mixed A plurality of valves including an injector installed on the discharge water supply pipe, a hydrogen peroxide supply pump installed on a pipe between the hydrogen peroxide tank and the ozone generator, and a flow control valve to promote dissolution and reaction. Ozone filtration water treatment equipment. The method of claim 3, wherein Purified water supply pipe is characterized in that the purified water supply pipe is configured between the purified water tank and the mixed tank and the filter chamber so that the purified water of the purified water tank is used as the filter element washing water and the clean water supplied to the mixing tank and the filter chamber.