JP2023018824A - Contaminated water decomposition treatment apparatus - Google Patents

Abstract

To provide a contaminated water decomposition treatment apparatus that has a small environmental impact, requires less energy consumption for decomposition of contaminated water, enables environmental purification at a lower cost than existing decomposition technologies, and can reduce the time required for decomposition treatment of contaminated water to below standard values in a shorter time.SOLUTION: A contaminated water decomposition treatment apparatus includes a generating area 2 for generating reactive oxygen species, a reaction area 3 for reacting the generated reactive oxygen species with contaminated water, and a partition member having conductivity that divides the generating area 2 and the reaction area 3. The generating area 2 has an electrode positioned to face the partition member and a gas supply pipe 8 that supplies gas used for generating reactive oxygen species. By energizing the conductive partition member from the electrode, reactive oxygen species are generated using the gas, the generated reactive oxygen species permeate from the generating area 2 to the reaction area 3, and the reactive oxygen species that permeate into the reaction area 3 are reacted with the contaminated water.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a polluted water decomposition treatment apparatus that decomposes polluted water with active oxygen species.

1,4-dioxane (1,4-DXA) is a regulated substance newly added to the soil environmental quality standards in April 2017. Since 1,4-DXA has been a regulated substance under the Soil Contamination Countermeasures Law, it is expected that 1,4-DXA will become a regulated substance under the Soil Contamination Countermeasures Law in the future. However, since 1,4-DXA differs greatly in physical properties from existing regulated substances, there is currently no efficient decomposition method. On the other hand, since 1,4-DXA has been used in the chemical industry and pharmaceutical manufacturing, it is predicted that the need for 1,4-DXA decomposition technology will increase if it is added to the list of substances regulated by the Soil Contamination Countermeasures Law. be done.

Here, 1,4-DXA has properties of high hydrophilicity and a high boiling point, which is almost the same as that of water. This is a different property from existing controlled substances. Conventional purification technologies using heat treatment and aeration treatment utilize the properties of existing controlled substances, so many of the conventional purification technologies using these properties are not compatible with the purification of 1,4-DXA. Can not.

And there are several prior arts regarding conventional purification methods for 1,4-DXA. For example, (1) technology using 1,4-DXA-degrading bacteria, (2) Fenton method, (3) technology using persulfate and quicklime, (4) decomposition method using microbubbles and persulfate or (5) a technique of decomposing 1,4-DXA by applying an electric current to the soil as a resistor and raising the temperature.

However, each conventional prior art has its own drawbacks. For example, in the technique (1), the environmental load caused by microorganisms is considered, and it is difficult to deal with complex contamination, and there is also the problem of energy consumption due to the temperature control necessary for the activity of microorganisms. Also, in the techniques (2) and (3), problems such as a decrease in efficiency due to the influence of coexisting substances such as manganese ions and chloride ions, and an environmental load due to the chemical substances used are conceivable. Furthermore, in the technique of (4), while the treatment takes a long time, the treatment efficiency may be low (removal rate is about 80% after 240 minutes when the temperature is raised to 40 degrees). It consumes a lot of energy because it decomposes 1,4-DXA by applying an electric current and raising the temperature.

Therefore, in order to solve the problems of the prior art and prior development examples, the use of reactive oxygen species with high oxidizing power has been considered. However, in order to use reactive oxygen species, there are problems such as (a) a method for efficiently generating reactive oxygen species and (b) a method for efficiently injecting reactive oxygen species into an object to be purified because they are highly reactive. There is

JP 2017-213478 A JP 2013-86072 A

Thus, the present invention has been devised to address the above-mentioned conventional problems. It is an object of the present invention to provide a polluted water decomposing apparatus capable of reducing the time required for decomposing polluted water to a standard value or less in a short period of time.

The present invention
a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a conductive partition member for partitioning the generation region and the reaction region; has
The generation region includes an electrode arranged to face the partition member, and a gas supply pipe for supplying a gas used for generating reactive oxygen species,
generating active oxygen species using the gas by energizing the partition member having conductivity from the electrode,
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
characterized by
or,
a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a partition member for partitioning the generation region and the reaction region;
A first electrode provided in contact with the partition member, a second electrode arranged to face the first electrode, and a gas used for generating reactive oxygen species are supplied to the generation area section. a gas supply pipe;
energizing the first electrode from the second electrode to generate reactive oxygen species using the gas;
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
characterized by
or,
a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a partition member for partitioning the generation region and the reaction region;
The generation region includes a mesh electrode provided in contact with the partition member, a needle electrode arranged to face the mesh electrode, and a gas used to generate reactive oxygen species. a gas supply pipe for supplying the
generating active oxygen species using the gas by energizing the mesh-like electrode from the needle-like electrode;
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
characterized by
or,
A stirrer is provided in the reaction zone, and the contaminated water in the reaction zone can be stirred by the stirrer.
characterized by
or,
The reaction zone is composed of a water pipe through which a liquid flows,
It is characterized by

According to the present invention, the environmental load is small, the energy consumption required for decomposition of contaminated water is small, environmental purification is possible at a lower cost than the existing decomposition technology, and the time required for decomposition treatment of contaminated water is short. can be reduced to the standard value or less.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration explanatory diagram (Part 1) for explaining a schematic configuration of a contaminated water decomposition treatment apparatus according to the present invention; FIG. 2 is a configuration explanatory diagram (No. 2) for explaining a schematic configuration of the contaminated water decomposition treatment apparatus according to the present invention; FIG. 2 is an explanatory diagram illustrating reaction rate constants of reactive oxygen species and standard oxidation potentials; FIG. 2 is an explanatory diagram (part 1) for explaining experimental data of the present invention; FIG. 2 is an explanatory diagram (part 2) for explaining experimental data of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration explanatory diagram (part 1) for explaining a configuration to which the schematic configuration of a contaminated water decomposition treatment apparatus according to the present invention is applied; FIG. 2 is a configuration explanatory diagram (part 2) for explaining a configuration to which the schematic configuration of the contaminated water decomposition treatment apparatus according to the present invention is applied; FIG. 3 is a configuration explanatory diagram (No. 3) for explaining a configuration to which the schematic configuration of the contaminated water decomposition treatment apparatus according to the present invention is applied;

FIG. 1 is a schematic diagram illustrating the configuration of the contaminated water decomposition treatment apparatus of the present invention.
Reference numeral 1 denotes a treatment tank for decomposing contaminated water. The treatment tank 1 includes a generation region 2 for generating reactive oxygen species, a reaction region 3 for decomposing contaminated water, and the generation region 2. and a partition member for partitioning the reaction area section 3 from the reaction area section 3 .

First, the configuration of the generation area unit 2 will be described.
A first electrode 5 is provided in the generation region portion 2 so as to be in contact with the partition member. The first electrode 5 has a mesh shape and is made of a metallic material that is difficult to oxidize.

Reference numeral 6 denotes a second electrode, and the second electrode 6 is arranged so as to face the first electrode 5 . The tip of the second electrode 6 is needle-shaped, and in FIG. 1, a large number of needle-shaped electrodes are provided to form a multiple needle-shaped electrode. Moreover, it is configured such that a voltage, which will be described later, is applied to the multiple needle-shaped electrodes. Although not shown, a configuration may be adopted in which several clusters are formed for each of the multiple needle-shaped electrodes, and a voltage described later is applied to each cluster.

In addition, it is conceivable to use, for example, a conical electrode as the needle-shaped second electrode 6, but the tip of the electrode may be needle-shaped, and the shape of the electrode itself is limited to a conical shape. not a thing As the material of the second electrode 6, a material such as stainless steel or tungsten that is hard to wear is used.

As can be seen from FIG. 1, the first electrode 5 and the second electrode 6 are connected to a power supply 7 . The power source 7 is a high-voltage power source capable of applying a high voltage of several hundred V to several tens of kV or higher. The high-voltage power source 7 is not a constant voltage but an AC voltage or a pulse voltage waveform, so that streamer discharge, atmospheric pressure glow discharge, etc., occur between the first electrode 5 and the second electrode 6. Electricity can be generated.

Here, it is conceivable to use a modulated pulse voltage, a nano-pulse voltage, or the like as the pulse-like voltage. The power source 7 may be connected to an external power source provided outside the processing tank 1 to supply electric power.

A gas supply pipe 8 for supplying a gas used for generating reactive oxygen species is provided in the generation region section 2 . For example, gas containing air or oxygen is supplied from the gas supply pipe 8 .

Next, the configuration of the reaction region section 3 will be described with reference to FIG.
A contaminated water supply pipe 9 for supplying contaminated water is provided in the reaction region 3, and the contaminated water to be decomposed is supplied from the contaminated water supply pipe 9 at appropriate times. Then, the contaminated water is decomposed, and the liquid below the environmental standard value, the waste water standard value, or the management standard value is discharged from the drain pipe 10 . A valve 11 is provided in the drain pipe 10, and by opening and closing the valve 11, it is possible to operate the discharge of the solution that has become equal to or less than the drain standard value.

An exhaust pipe 12 is provided to discharge gas generated when the contaminated water is decomposed. In FIG. 1, the contaminated water supply pipe 9 and the exhaust pipe 12 are provided separately. Contaminated water may be supplied to the inside of the unit 3, and the generated gas may be exhausted.

It is also conceivable to connect the exhaust pipe 12 and the gas supply pipe 8 provided in the generation region section 2 so that the generated gas circulates. By adopting such a configuration, if the gas generated and discharged when the contaminated water is decomposed is a gas that can be used to generate the active oxygen species again, the active oxygen species can be efficiently generated. This is because

A stirrer 13 is attached to the reaction zone section 3 . The agitator 13 agitates the contaminated water stored in the reaction zone 3, thereby increasing the frequency of contact with bubbles containing active oxygen species, which will be described later, and efficiently decomposing the contaminated water. can be done. In FIG. 1, the stirrer 13 is suspended from above. There are no particular restrictions on the installation method or installation location.

Next, the configuration of the porous member 4, which is an example of the partition member, will be described.
As the porous member 4, a plate-shaped or sheet-shaped member is used, for example, a micro/nanoporous porous ceramic film (for example, SPG film) or a porous polymer film (for example, Poreflon) having a thickness of 1 mm or less. can be considered.

The porous member 4 is provided in the treatment tank 1 so as to partition the generation region portion 2 and the reaction region portion 3, and the generated active oxygen species is transferred from the generation region portion 2 to the reaction region portion 3. It is partitioned so that it can be transmitted in the direction of

Here, a conductive member (for example, metal, silicon carbide, etc.) can be processed to have a large number of pores to form the conductive porous member 4 . By using the conductive porous member 4, it is not necessary to provide the first electrode 5 in the generation region section 2, and the conductive porous member 4 can be used as a substitute for the first electrode 5. can be done. At that time, the power source 7 connected to the first electrode 5 is connected to the conductive porous member 4 .

A partition structure for allowing active oxygen species to pass through the porous member 4 in the direction from the generation region portion 2 to the reaction region portion 3 will be briefly described.
For example, as shown in FIG. 1, when the reaction region 3 for treating contaminated water is provided above the porous member 4 and the generation region 2 for generating active oxygen species is provided below. By adjusting the amount of gas supplied from the gas supply pipe 8, the air pressure in the generation area section 2 can be adjusted. By increasing the amount of gas supplied from the gas supply pipe 8, the air pressure in the generation region section 2 is increased, and a partition that allows active oxygen species to permeate in the direction (upward direction) to the reaction region section 3. It is conceivable to configure In addition, it is necessary to adjust the air pressure in the generation area 2 so that the contaminated water (liquid) stored in the reaction area 3 does not leak into the generation area 2 below.

Here, a generation method for generating reactive oxygen species within the generation region section 2 will be described.
First, a gas containing air or oxygen is supplied from the gas supply pipe 8 into the generation region section 2, and a voltage of several hundred V to several tens of kV or more is applied to the mesh-like first electrode 5 and the needle-like second electrode 6. Apply high voltage. Then, by applying a high voltage, electricity such as streamer discharge or atmospheric pressure glow discharge is generated between the mesh-like first electrode 5 and the needle-like second electrode 6 . Furthermore, by colliding high-energy electrons accelerated by a high electric field at the tip of the needle-like second electrode 6 with oxygen molecules in the supplied air or oxygen-containing gas, highly excited atomic oxygen Active oxygen species such as O ^* ( ¹ D), molecular oxygen radicals O ₂ (a ¹ Δ _g ), and OH radicals can be efficiently generated.

Then, the air pressure in the generation region 2 is adjusted, and as is understood from FIG. at the same time that the active oxygen species is encapsulated in gas bubbles and permeates into the reaction region portion 3 in the bubbled state.

Then, the reactive oxygen species contained in the bubbles and the substance to be treated in the contaminated water come into gas-liquid contact in the reaction region 3, whereby the substance to be treated is oxidatively decomposed by the active oxygen species and decomposed. It is possible. Since oxidative decomposition frequently occurs in the vicinity of the porous member 4, the contaminated water is stirred by the stirrer 13 provided in the reaction zone 3, thereby increasing the frequency of gas-liquid contact and decomposing the entire contaminated water. Processing can be expedited.

FIG. 3 is a table showing reaction rate constants and standard oxidation potentials of various reactive oxygen species. As can be seen from the figure, the reactive oxygen species have extremely strong oxidizing power and are in a state of high reactivity, in other words, they act to bond. Therefore, since it strongly reacts with the substance to be treated in the contaminated water in the reaction region 3, the purification treatment can be performed efficiently.

Next, Example 1 of the polluted water decomposition treatment apparatus of the present invention will be described. In Example 1, simulated contaminated water containing 1,4-dioxane (1,4-DXA) was used as the substance to be treated, and the initial 1,4-dioxane (1,4-DXA) concentration was 1.02 mg/L for decomposition treatment.

First, the simulated contaminated water containing 1,4-dioxane (1,4-DXA) is introduced from the contaminated water supply pipe 9 of the treatment layer 1 and stored in the reaction zone 3 . Then, air or a gas containing oxygen is introduced from the gas supply pipe 8 into the generation region 2, and a high voltage of several hundred V to several tens of kV or more is applied to the mesh-like first electrode 5 and the needle-like second electrode 6. is applied. Although the mesh-shaped first electrode 5 is used in the first embodiment, a conductive porous member 4 may be used instead of the mesh-shaped first electrode 5 .

In the present embodiment 1, air or a gas containing oxygen is introduced from the gas supply pipe 8 to increase the pressure in the generation region 2, permeate the porous member 4, and generate bubbles in the reaction region 3. After forming, a 50 Hz modulated pulse high voltage and a nano-pulse high voltage are applied to energize streamer discharge or atmospheric pressure glow discharge between the mesh-shaped first electrode 5 and the needle-shaped second electrode 6. and further, by colliding high-energy electrons accelerated by the high electric field at the tip of the needle-like second electrode 6 with oxygen molecules in the supplied air or oxygen-containing gas, atoms in a highly excited state Reactive oxygen species such as O ^* ( ¹ D), molecular oxygen radicals O ₂ (a ¹ Δ _g ), and OH radicals were generated.

Then, the generated active oxygen species in a highly excited state permeated the porous member 4 together with air or other gas. At the same time that the active oxygen species permeate through the porous member 4, the active oxygen species are encapsulated in the permeated air or other gas bubbles and introduced into the reaction region portion 3, where they are allowed to circulate in the reaction region portion 3 for a certain period of time. The decomposition treatment was performed by stirring with the stirrer 13 . Alternatively, the exhaust pipe 12 and the gas supply pipe 8 may be connected to circulate. The advantage of such a circulation structure is that the ozone generated in the generation region 2 is also effective in decomposing harmful substances, and that the harmful substances present in the exhaust gas are circulated and directly introduced into the generation region 2. By doing so, the effect of increasing the decomposition efficiency can be expected.

After a certain period of time, if the concentration of 1,4-dioxane (1,4-DXA) falls below the environmental standard value, the waste water standard value, or the management standard value, open the valve 11 and drain the water from the drain pipe 10. do.

FIG. 4 shows the results obtained in Example 1 above. In the case of 1,4-dioxane (1,4-DXA), the wastewater standard is 0.5 mg/L and the environmental standard is 0.5 mg/L. 05 mg/L.
When the voltage applied to the first electrode 5 and the second electrode 6 is a 50 Hz modulated pulse high voltage, the concentration of 1,4-dioxane (1,4-DXA) in the simulated polluted water falls below the wastewater standard after about 25 minutes. After about 55 minutes, it was confirmed that it was below the environmental standard. In addition, when the applied voltage is nano-pulse high voltage, the concentration of 1,4-dioxane (1,4-DXA) in the simulated contaminated water falls below the wastewater standard after about 15 minutes, and below the environmental standard after about 35 minutes. was confirmed to be On the other hand, in the decomposition treatment using ozone, the concentration of 1,4-dioxane (1,4-DXA) in the simulated polluted water did not fall below the wastewater standard even after 120 minutes. From the above results, it was confirmed that decomposition treatment can be performed in a much shorter time than the conventional technology.

FIG. 5 is a diagram showing the results of decomposition treatment by applying nanopulse high voltage in the same procedure as in Example 1, using simulated contaminated water containing tetrachlorethylene as the substance to be treated. The initial concentration of tetrachlorethylene is 0.733 mg/L, and the effluent standard for tetrachlorethylene is 0.1 mg/L, and the environmental standard is 0.01 mg/L.
According to the decomposition treatment apparatus of the present invention, it was confirmed that the concentration of tetrachlorethylene fell below the wastewater standard after about 7 minutes, and fell below the environmental standard after about 16 minutes.

Next, Embodiment 2 to which the contaminated water decomposition treatment apparatus of the present invention is applied will be described with reference to FIG. Example 2 is an application of the configuration of the present invention described above, and uses an existing water pipe 14 in which contaminated water is flowing, such as an existing pipe line, as a substitute for the reaction region 3. This is an embodiment in which contaminated water is decomposed in the existing running water pipe 14 in which contaminated water is flowing, such as the existing pipe, by introducing active oxygen species generated therein.

In this configuration, when the contaminated water flowing in the water pipe 14 comes into contact with the inner surface of the water pipe 14, a shear force is generated between the inner surface of the water pipe 14 and the contaminated water, and the generated shear force is used. it seems to do. When the bubbles containing the active oxygen species together with air or other gas pass through the porous member 4, the shear force can be used to reduce the size of the bubbles. This is because the chances of gas-liquid contact between the seeds and the substances to be treated in the contaminated water can be increased. It is considered that this allows the decomposition process to be performed more efficiently.

However, a major feature of this embodiment is that, as described above, the existing water pipe 14 through which the contaminated water flows, such as the existing pipe, is used as a substitute for the reaction zone 3, and the activity generated in the water pipe 14 is Needless to say, it is possible to decompose polluted water by introducing oxygen species.

As can be understood from FIG. 6 , two generation area units 2 are connected (attached) to the upper surface of the water pipe 14 . In the case of this embodiment, two generation area units 2 are connected to the upper surface of the water pipe 14, but the location where the generation area units 2 are connected is not limited to the upper surface of the water pipe 14. Any position such as the lower surface or the side surface where active oxygen species can be efficiently introduced may be used. Also, the number of generation area units 2 to be connected is not limited to two, and may be one, or may be three or more.

FIG. 8 shows a configuration example in which the generation area section 2 is configured in a doughnut shape and the doughnut-shaped generation area section 2 is connected (attached) to the outer periphery of the water pipe 14 . With this configuration, the reactive oxygen species generated in the doughnut-shaped generation region 2 can be supplied from the outer periphery (360 degrees) of the water pipe 14 to which the generation region 2 is connected. of. In this configuration example, the generation region section 2 has a donut shape, but is not limited to a donut shape, and may be arch-shaped (curved in a semicircular shape), and the shape of the generation region section 2 is not limited at all.

The formation of the generation region portion 2 in a donut shape, etc., and the number and range of the generation region portions 2 to be connected are determined according to the concentration and flow rate of the contaminated water flowing through the water flow pipe 14, so that active oxygen species can be efficiently generated. will be appropriately determined so that it can be introduced and decomposed.

Here, as a method for connecting (attaching) the generation area section 2 to the water flow pipe 14, for example, an opening having the same size as the opening of the generation area section 2 is provided on the wall surface of the water flow pipe 14. A method of making a large hole or a small hole and adhering the generation area portion 2 to the hole using an adhesive or the like or a method of mechanically fastening with a bolt or the like can be considered. Basically, it is assumed that a hole that is the same as or larger than the opening of the generation area section 2 is provided in the wall surface of the water pipe 14, but a small diameter hole is provided in the wall surface of the water pipe 14. It is also conceivable to make an opening and connect (attach) to that portion. The size of the hole formed in the wall surface of the water pipe 14 is not particularly limited, and the connection method is not particularly limited as long as the connection method does not allow the gas or the like in the generation region 2 to leak to the outside.

A porous member 4 is interposed between the water flow pipe 14 and the generating region 2, and the porous member 4 is used as a partition. A mesh-like first electrode 5 is provided so as to come into contact with the porous member 4 . As described above, a conductive porous member 4 can be used by processing a conductive member (for example, metal, silicon carbide, etc.) to have a large number of pores. By using the conductive porous member 4, it is not necessary to provide the first electrode 5 in the generation region section 2, and the conductive porous member 4 can be used as a substitute for the first electrode 5. can be done.

Reference numeral 15 indicates an air pump. The primary purpose of the air pump 15 is to circulate gas (gas phase), and to introduce air or oxygen-containing gas into the generation region 2 in order to generate active oxygen species. Furthermore, in order to push out the active oxygen species into the water pipe 14 (liquid phase), the pressure in the generation region section 2 must exceed the pressure in the water flow pipe 14 (liquid phase). It also has the role of increasing the air pressure in the section 2 by the air pump 15 and pushing out the generated reactive oxygen species into the water flow pipe 14 .

Next, reference numeral 16 indicates a water pump. The water pump 16 is for increasing the flow rate of contaminated water in the water pipe 14 . By increasing the flow velocity of the contaminated water in the water pipe 14, the shear force can be increased. If the flow velocity of the contaminated water in the water pipe 14 is sufficient for decomposing the contaminated water, the water pump 16 need not be provided in the configuration of the second embodiment.

A protrusion 17 and/or a venturi tube 18 are provided in the water flow tube 14 . The protrusion 17 has the effect of generating turbulence in the contaminated water flowing through the water pipe 14 and increasing the shearing force due to the generated turbulence. Moreover, the venturi tube 18 has the effect of increasing the shear force by increasing the flow velocity of the contaminated water flowing through the water tube 14 .

A contaminated water decomposition treatment method using the second embodiment will be briefly described.
Air or a gas containing oxygen is introduced from the air pump 15 into the generating region 2, and a high voltage of several to several tens of kV or more is applied to the mesh-like first electrode 5 and the needle-like second electrode 6. FIG. Although the mesh-like first electrode 5 is used, a conductive porous member 4 may be used instead of the mesh-like first electrode 5 .

Air or a gas containing oxygen is introduced from the air pump 15 into the generation region 2 to increase the pressure in the generation region 2, permeate the porous member 4, and form air bubbles in the water pipe 14. After that, a 50 Hz modulated pulse high voltage and a nano-pulse high voltage are applied, and electricity such as streamer discharge or atmospheric pressure glow discharge is applied between the mesh-shaped first electrode 5 and the needle-shaped second electrode 6. Further, high-energy electrons accelerated by a high electric field at the tip of the needle-like second electrode 6 collide with oxygen molecules in the supplied air or oxygen-containing gas, thereby forming highly excited atomic-like atoms. It generates reactive oxygen species such as oxygen O ^* ( ¹ D), molecular oxygen radicals _O2 ( ^a1 _Δg ), and OH radicals.

When the generated active oxygen species in a highly excited state permeate the porous member 4 together with air or other gas into the water pipe 14, the active oxygen species permeate the porous member 4, and at the same time, The active oxygen species are included in the permeated air or other gas bubbles and introduced into the water pipe 14, where the polluted water is decomposed.

As described above, when the reactive oxygen species are introduced into the water pipe 14, the contaminated water flowing in the water pipe 14 comes into contact with the inner surface of the water pipe 14, and the inner surface of the water pipe 14 and the contaminated water A shearing force is generated between them, and the generated shearing force is used. When the bubbles containing the active oxygen species together with air or other gas pass through the porous member 4, the shear force can be used to reduce the size of the bubbles. It is possible to increase the chances of gas-liquid contact between the seeds and the substances to be treated in the contaminated water. As a result, decomposition processing can be performed more efficiently. Also, a water pump 16, a projection 17 and a venturi tube 18 may be provided within the flow tube 14 to increase shear forces.

FIG. 7 shows a third embodiment in which the configuration of the second embodiment (application example) described with reference to FIG. 6 is further applied. In Example 3, the configuration of Example 2 is reduced to a portable size. In Example 2, for example, the generation region unit 2 is connected (attached) to an existing water pipe 14 such as a pipeline, but in Example 3, the water pipe 14 of a size that can be carried is used. The generation area unit 2 is connected (attached) to form a contaminated water decomposition treatment apparatus.

Reference numeral 19 denotes an existing contaminated water storage tank, and as can be seen from FIG. Can be disassembled.

As described above, according to the present invention, since chemical substances and microorganisms are not used, the environmental load is extremely small, and since it is possible to efficiently decompose contaminated water in a short time, the energy consumption required for decomposing contaminated water is small. It is possible to purify the environment at low cost because there is no need to use large-scale equipment, and it has excellent effects that the time required for decomposition treatment of contaminated water can be reduced to the standard value or less in a short time.

1 Treatment tank 2 Generation region 3 Reaction region 4 Porous member 5 First electrode 6 Second electrode 7 Power supply 8 Gas supply pipe 9 Contaminated water supply pipe 10 Drain pipe 11 Valve 12 Exhaust pipe 13 Stirrer 14 Water flow pipe 15 Air pump 16 Water pump 17 Protrusion 18 Venturi tube 19 Contaminated water storage tank

Claims (5)

a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a conductive partition member for partitioning the generation region and the reaction region; has
The generation region includes an electrode arranged to face the partition member, and a gas supply pipe for supplying a gas used for generating reactive oxygen species,
generating active oxygen species using the gas by energizing the partition member having conductivity from the electrode,
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
A contaminated water decomposition treatment apparatus characterized by:
a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a partition member for partitioning the generation region and the reaction region;
A first electrode provided in contact with the partition member, a second electrode arranged to face the first electrode, and a gas used for generating reactive oxygen species are supplied to the generation area section. a gas supply pipe;
energizing the first electrode from the second electrode to generate reactive oxygen species using the gas;
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
A contaminated water decomposition treatment apparatus characterized by:
a generation region for generating reactive oxygen species, a reaction region for reacting the generated reactive oxygen species with contaminated water, and a partition member for partitioning the generation region and the reaction region;
The generation region includes a mesh electrode provided in contact with the partition member, a needle electrode arranged to face the mesh electrode, and a gas used to generate reactive oxygen species. a gas supply pipe for supplying the
generating active oxygen species using the gas by energizing the mesh-like electrode from the needle-like electrode;
The partition structure by the partition member is configured so that the generated active oxygen species can permeate from the generation region to the reaction region, and the active oxygen species permeated to the reaction region react with the contaminated water. let
A contaminated water decomposition treatment apparatus characterized by:
A stirrer is provided in the reaction zone, and the contaminated water in the reaction zone can be stirred by the stirrer.
4. The polluted water decomposition treatment apparatus according to claim 1, 2 or 3, characterized in that:
The reaction zone is composed of a water pipe through which a liquid flows,
The polluted water decomposition treatment apparatus according to claim 1, claim 2, claim 3 or claim 4, characterized in that:

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