JP2004089935A - Water treatment method and water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water treatment method and water treatment apparatus capable of performing the decomposition of contaminants and the sterilization and extinction of microorganisms by disposing discharge sections for generating oxygen active species having great reaction characteristics into water to be treated. <P>SOLUTION: The apparatus is provided with a water flow pipe 11 which has the film of polyaniline 12 generating oxygen active species formed on its inner wall and in which the water is circulated from below to above and the first and second discharge sections 14 and 15 which discharge electricity to the water to be treated by applying high-voltage pulses thereto. More than two water discharge sections 14 and 15 are arranged at the water flow pipe 11 and the oxygen active species and oxygen are generated by the discharge section 14 on the upstream side and are supplied to the polyaniline 12 and thereafter the many oxygen active species are formed by the second discharge section 15 on the downstream so that the contaminants in the water to be treated are decomposed and the microorganisms therein are sterilized. As a result, the decomposition of the contaminants and the sterilization and extinction of the microorganisms are made possible. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a water treatment method and a water treatment apparatus for electrochemically treating water to be treated, and more particularly, to the generation of hydroxy radicals, which are oxygen active species, from the water to be treated.
[0002]
[Prior art]
Conventionally, this type of water treatment method and water treatment apparatus are disclosed in, for example, Japanese Patent Application Laid-Open No. 10-99863. In this publication, a treated water tank in which treated water to be sterilized is stored, an anode disposed so that at least a part thereof is immersed in the treated water, and a polyaniline film adhered to the surface, and the polyaniline film is It comprises a cathode disposed so as to be immersed in the water to be treated, and a current source for supplying a current to the anode and the cathode.
[0003]
The polyaniline while intermittently or continuously energized between anode and cathode superoxide be generated by reducing the dissolved oxygen in the water to be treated _- sterilize microorganisms contained in the water to be treated by (O · ²⁾ I am trying to do it. That is, when the polyaniline is brought into contact with the water to be treated, it reduces the dissolved oxygen (O ₂ ) in the water to be treated to produce superoxide (O · ₂ ⁻ ) having an excellent bactericidal action, and further reduces oxygen. Thus, the once oxidized polyaniline is electrochemically reduced by the reduction current flowing to the electrode in the water to be treated, and the oxygen in the water to be treated is regenerated to polyaniline which can be reduced again. Thus, superoxide by polyaniline (O · 2 ^_-) will be performed without generation of ceases, so that it is possible to reliably sterilize the microorganisms in the for-treatment water even large amounts of water to be treated .
[0004]
[Problems to be solved by the invention]
However, according to the above publication, the dissolved oxygen (O ₂ ) in the treated water is configured to stir the treated water in order to efficiently contact the polyaniline, but the dissolved oxygen (O ₂ ) is stored in the treated water tank. When the dissolved oxygen (O ₂ ) in the water to be treated is exhausted, there is a problem that the above-mentioned generation of superoxide (O · ₂ ⁻ ) and reduction of polyaniline cannot be continuously performed. Also, the superoxide (O · 2 ^_-), because generally less reactive properties of bactericidal action than other oxygen active species, although it is effective against bacteria, such as a large plankton to There is a problem that sufficient effects cannot be exhibited.
[0005]
Therefore, an object of the present invention is to provide a discharge unit that generates oxygen-active species having large reaction characteristics in the water to be treated, thereby dissolving pollutants and sterilizing microorganisms. It is an object of the present invention to provide a water treatment method and a water treatment device that can be killed.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the technical means described in claims 1 to 7 is adopted. That is, in the first aspect of the present invention, the discharge unit (14) for applying a high voltage pulse to the water pipe (11) through which the polyaniline (12) for generating oxygen active species is formed on the inner wall and the water to be treated flows. , 15), wherein the water to be treated is treated electrochemically,
At least two discharge units (14, 15) are disposed in the water pipe (11), and oxygen active species and oxygen are generated from the water to be treated by the first discharge unit (14) on the upstream side to form polyaniline (12). After the supply, the second discharge section (15) on the downstream side generates more oxygen active species to decompose contaminants in the water to be treated and sterilize microorganisms.
[0007]
According to the first aspect of the present invention, it is known that the water to be treated can be purified by flowing the water to be treated between the electrodes and discharging between the electrodes. Therefore, in the present invention, at least two or more discharge units (14, 15) are arranged in the water pipe (11) on which the polyaniline (12) is formed, and the first discharge unit (14) on the upstream side performs processing. After oxygen active species and oxygen are generated from water and supplied to the polyaniline (12), more oxygen active species are generated by the second discharge section (15) on the downstream side to decompose pollutants in the water to be treated. And sterilization of microorganisms, the first discharge portion (14) generates hydroxyl radicals (OH.) And dissolved oxygen (O ₂ ) as oxygen active species, and the polyaniline (12) generates dissolved oxygen (OH). O ₂₎ from superoxide oxygen active species (O · ₂ ^-) is generated, and the second discharge section (15) by superoxide (O · ₂ ^-) from hydroxyalkylcellulose radical (OH ·) It is generated.
[0008]
Hydroxyl radical (OH.) Is an oxygen-active species that is particularly excellent in bactericidal reaction characteristics and oxidative power. Therefore, it decomposes chemical substances such as organic substances and kills microorganisms such as bacteria and phytoplankton. You can kill.
[0009]
In addition, by arranging a plurality of the first discharge units (14) and the second discharge units (15) in multiple stages, the above effects are repeated, so that the purification capacity of the water to be treated can be increased. Therefore, the present invention is suitable for purifying ballast water loaded on tankers or cargo ships that require sterilizing ability of microorganisms such as large plankton.
[0010]
The invention according to claim 2 is characterized in that the water to be treated is swirled upward from below by the swirling means (13).
[0011]
According to the second aspect of the invention, the circulation of the water to be treated is swirled by the swirling means (13), whereby the dissolved oxygen in the water to be treated is uniformly supplied to the polyaniline (12). 12) by superoxide (O · ₂ ^-) can be carried out without the generation is interrupted in.
[0012]
In addition, by causing the water to be treated to flow upward from below, bubbles generated by the first discharge unit (14) are sent to the second discharge unit (15), and also in the second discharge unit (15). When a discharge occurs also on the surface of the bubble, further hydroxyl radical (OH.) Can be generated.
[0013]
The invention according to claim 3 is characterized in that, in the water pipe (11), hydroxy radicals (OH.) Are mainly generated among the oxygen active species by the discharge portions (14, 15).
[0014]
According to the third aspect of the present invention, as described in the first aspect, the hydroxyl radical (OH.) Is excellent in the reaction characteristics of bactericidal action and the oxidizing power among the oxygen active species. It can decompose chemical substances and kill and kill microorganisms such as bacteria and phytoplankton.
[0015]
According to the fourth aspect of the present invention, in the water treatment apparatus for electrochemically treating the water to be treated, a polyaniline (12) for generating oxygen active species is formed on the inner wall, and the water to be treated is directed upward from below. And a discharge unit (14, 15) disposed in the water pipe (11) for applying a high voltage pulse to the water to be treated to generate shock waves and ultraviolet rays,
At least two or more discharge units (14, 15) are arranged in the water pipe (11). The first discharge unit (14) on the upstream side generates oxygen active species and oxygen from the water to be treated, and generates polyaniline (12). After being supplied to the water, more oxygen active species are generated by the second discharge section (15) on the downstream side to decompose contaminants in the water to be treated and sterilize microorganisms. .
[0016]
According to the invention described in claim 4, specifically, the first discharge unit (14) and the second discharge unit (15) are arranged in the water pipe (11) on which the polyaniline (12) is formed. Then, after the active oxygen species and oxygen are generated from the water to be treated by the first discharge section (14) on the upstream side and supplied to the polyaniline (12), a larger amount of oxygen is generated by the second discharge section (15) on the downstream side. The same effects as those of the first aspect are achieved by generating oxygen active species to decompose contaminants in the water to be treated and sterilize microorganisms.
[0017]
The invention according to claim 5 is characterized in that the water pipe (11) is provided with a swirling means (13) so as to swirl the water to be treated.
[0018]
According to the fifth aspect of the present invention, since the swirling means (13) is provided, the dissolved oxygen in the water to be treated flowing through the water pipe (11) is uniformly supplied to the polyaniline (12). in, polyaniline (12) superoxide by _- can be carried out without generation is interrupted in (O · ^2).
[0019]
The invention according to claim 6 is characterized in that a plurality of water pipes (11) and discharge units (14, 15) are provided in parallel with each other.
[0020]
According to the invention described in claim 6, by providing a plurality, the purification capacity of the water to be treated can be increased. Therefore, it is suitable for purifying ballast water loaded on tankers and cargo ships that require large sterilization capacity.
[0021]
In the invention according to claim 7, the discharge units (14, 15) are characterized in that hydroxyl radicals (OH.) Are mainly generated from oxygen-treated species from the water to be treated.
[0022]
According to the seventh aspect of the invention, the same effect as the third aspect is obtained.
[0023]
Note that the reference numerals in parentheses of the above means indicate the correspondence with specific means of the embodiment described later.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment in which the present invention is applied to a water treatment apparatus for purifying water to be treated contaminated in a closed water area (for example, a lake or a marsh) will be described with reference to FIGS. Incidentally, the water to be treated in a closed water body includes microorganisms such as bacteria (bacteria), fungi, filamentous fungi (micro), Escherichia coli, yeast, deformed fungi, single-cell algae, protozoa, viruses, phytoplankton, etc. The water treatment apparatus according to the present embodiment is a water treatment apparatus that decomposes pollutants (such as organic substances) contained in water to be treated and sterilizes and kills these microorganisms.
[0025]
As shown in FIG. 1, the water treatment apparatus 10 according to the present embodiment includes a water pipe 11 through which water to be treated flows upward from below, and is disposed in the water pipe 11 and applies a high-voltage pulse to the water to be treated. First and second discharge units 14 and 15 for applying and discharging, a water supply pump 16 for pressure-feeding water to be treated to water pipe 11, and a high-voltage power supply for supplying a high voltage to first and second discharge units 14 and 15 Means 17 are provided.
[0026]
The water pipes 11 are formed of metal, and a plurality of the water pipes are provided in parallel, and are arranged so that the water to be treated flows upward from below. Then, as shown in FIG. 2, a polyaniline 12 that generates oxygen active species is formed on the inner wall of the water pipe 11.
[0027]
The polyaniline 12, dissolved oxygen (O ₂₎ from the active species of oxygen is one superoxide contained in the treated water flowing through the water pipe 11 by reduction (O · 2 ^_-) intended to produce, not shown A polyaniline film is formed on the surface of the support and formed on the inner wall surface of the water pipe 11. This support is made of a conductive material and is formed of a block-shaped porous structure having a certain thickness.
[0028]
This is because the water to be treated comes into contact with not only the polyaniline film formed on the surface but also the polyaniline film formed inside due to the block-shaped porous structure having a certain thickness, The generation efficiency of (O · ₂ ⁻ ) is increased, and furthermore, by being conductive, a reduction current flowing on the cathode side of the first and second discharge units 14 and 15 described later also flows on the support, This is because the regeneration reaction of the polyaniline film once oxidized by the reduction is performed, and the regeneration efficiency of the polyaniline is improved. In addition, as the block-shaped porous structure made of such a conductive material, there is a felt or mat made of carbon fiber, or a three-dimensional molded product obtained by forming a carbon material into a block having many continuous holes. .
[0029]
Further, at the upstream end of the water pipe 11, a turning means 13 for turning the flow of the water to be treated flowing in the water pipe 11 is provided. This is configured so that the dissolved oxygen (O ₂ ) contained in the water to be treated is supplied evenly to the polyaniline 12.
[0030]
The water pipe 11 is provided with at least two or more first and second discharge units 14 and 15. The first and second discharge units 14 and 15 are formed so that the anodes 14a and 15a and the cathodes 14b and 15b are immersed in the water to be treated and arranged so that one of the cathodes 14b and 15b contacts the polyaniline 12. Have been. 14c and 15c are insulating members made of ceramic for fixing the anodes 14a and 15a and the cathodes 14b and 15b.
[0031]
The first and second discharge units 14 and 15 are connected to a high-voltage power supply unit 17, and a high-voltage pulse is applied between the anodes 14 a and 15 a and the cathodes 14 b and 15 b so that the first and second discharge units 14 and 15 in the water to be treated. Discharge. In the present embodiment, the water to be treated flowing through the water pipe 11 is discharged by at least two discharges, that is, the first discharge unit 14 disposed on the upstream side and the second discharge unit 15 disposed on the downstream side. It purifies.
[0032]
Reference numeral 19 denotes a gas-liquid separation tank for removing air bubbles contained in the water to be treated flowing through the water pipe 11, and air bubbles in the water to be treated are removed at this portion and purified from the outlet 19 a. The liquid water to be treated is discharged.
[0033]
Further, the upstream side of the water supply pump 16 is connected to a water storage tank 20 that stores the water to be treated containing the contaminants collected from a closed water area or the like, and the water supply pump 16 is operated, so that the inside of the water treatment device 10 is provided. The treatment target water to be purified is sent. In addition, 21 is a drain pipe of the to-be-processed water stored in the water storage tank 20.
[0034]
The high-pressure power supply means 17 and the water pump 16 are connected to a control device (not shown) and controlled by the control device. In the present embodiment, by operating an operation switch (not shown), the control device (not shown) controls the high-voltage power supply means 17 and the water supply pump 16, and the water to be treated stored in the water storage tank 20 is supplied to the water pipe 11. Is discharged, the first and second discharge units 14 and 15 discharge and purify the water in the water to be treated.
[0035]
Next, the operation of the water treatment apparatus 10 having the above configuration will be described with reference to FIGS. FIG. 3 is an explanatory diagram showing an oxidation mechanism of organic substances in the water to be treated inside and outside the plasma channel generated by the first and second discharge units 14 and 15. First, as shown in FIG. 2, in the first discharge unit 14 on the upstream side of the water pipe 11, a high voltage pulse is applied between the anode 14 a and the cathode 14 b, so that the anode 14 a and the cathode 14 b Discharge occurs in the water to be treated.
[0036]
By this discharge, strong shock waves, high electric field strength, generation of oxygen active species, strong ultraviolet irradiation, and generation of ozone occur simultaneously in the water to be treated, thereby oxidizing and decomposing organic substances in the water to be treated. It is said that this enables purification of the water to be treated (for example, according to Sun et al., 2000).
[0037]
Specifically, as shown in FIG. 3, inside the plasma channel, for example, hydroxy radical (OH.) And hydrogen peroxide (H ₂ O ₂ ) and dissolved oxygen (O ₂ ) ₂ ) is generated. Outside the plasma channel, oxygen-activated species generated by ultraviolet irradiation, shock waves, and electric field strength cause a chemical reaction with organic substances, react with organic substances in the water to be treated, and are oxidized and decomposed, and are generated inside the plasma channel. Hydrogen peroxide (H ₂ O ₂ ) reacts to generate the above-mentioned hydroxy radical (OH.).
[0038]
By the way, the oxygen active species generated by the discharge have a bactericidal action because the oxidation-reduction potential is equal to or stronger than that of hypochlorous acid. In particular, among these, hydroxyl radicals (OH.) Generally have high germicidal reaction characteristics and strong oxidizing power, so they react with organic substances in the water to be treated to oxidize and decompose, thereby decomposing pollutants and causing microorganisms. It can be purified by sterilizing and killing.
[0039]
Here, the oxidizing power of the hydroxyl radical (OH.) Will be described. The hydroxyl radical (OH.) Has an energy equivalent to about 120 kcal / mol. In contrast, a hydrogen-carbon bond in a molecule constituting an organic substance has an energy equivalent to about 99 kcal / mol, and an oxygen-hydrogen bond has an energy equivalent to about 111 kcal / mol. The bond has an energy of about 83 kcal / mol, but the energy of the hydroxyl radical (OH.) Is larger than these, so that the bond between molecules is easily broken. Therefore, carbon is oxidized and decomposed into CO ₂ and hydrogen is oxidized into H ₂ O by the hydroxyl radical (OH.). This is why the oxidizing power of the hydroxyl radical (OH.) Can be said to be strong.
[0040]
On the other hand, the dissolved oxygen (O ₂ ) generated by the discharge is supplied to the polyaniline 12 formed on the inner wall of the water pipe 11, thereby causing the first discharge as shown by the following chemical reaction formula (1). It reacts with an anion (e ⁻ ) from the cathode 14 b of the part 14 to generate superoxide (O · ₂ ⁻ ) which is an oxygen active species, and partially as shown by the following chemical reaction formula (2). superoxide (O · ₂ ^-) of dissolved oxygen _{(O 2)} is generated with the hydrogen peroxide reacts with the hydrogen ions ^{_{(H +) (H 2 O}} 2).
[0041]
[Formula 1] ^{_{O 2 + e - → O ·}} 2 -
[0042]
Embedded image 2O · ₂ ⁻ + 2H ⁺ → H ₂ O ₂ + O ₂
Then, superoxide (O · ₂ ^-) and hydrogen peroxide _(H 2 _{O 2),} by the discharge of the second discharge unit 15 on the downstream side, hydroxy radical (OH ·) are more generated. Moreover, since the water pipe 11 is arranged vertically and the water to be treated is circulated upward from below, the bubbles generated by the first discharge unit 14 are sent to the second discharge unit 15, In the second discharge unit 15 as well, a discharge is generated on the surface of the bubble, so that further hydroxyl radical (OH.) Is generated. As described above, by discharging at at least two places of the first discharge unit 14 and the second discharge unit 15, more hydroxyl radicals (OH.) Can be generated, so that the bactericidal action can be further enhanced. It is.
[0043]
However, dissolved oxygen _{(O 2)} from superoxide (O · ₂ ^-) polyaniline 12 which is generated by oxidation of the first, the cathode 14b of the second discharge unit 14 and 15, because of the continuity and 15b side Oxidation is reduced by a reduction current supplied during discharging. Thus, superoxide _- it can be carried out without the generation of ceases (O · ^2).
[0044]
Next, according to a study by the inventor, it was found that the amount of generated hydroxy radicals (OH.) Differs depending on the presence or absence of the polyaniline 12 provided in the water pipe 11 and the number of discharge units 14 and 15 provided. Since it was found that it can be determined from the change in absorbance using NN dimethyl-P-nitrosoaniline (RNO) described in Comninellis, the description will be made based on FIGS. 4 and 5.
[0045]
That is, FIG. 4 shows the comparison between the polyaniline 12 and the generation of hydroxy radicals (OH.) When the polyaniline 12 is combined with one of the discharge portions 14 and 15 from the absorbance change characteristics. . The change characteristic indicated by (1) in the figure indicates the case where the polyaniline 12 and the discharge portions 14 and 15 are not provided, and the change characteristic indicated by (2) indicates the case where only the polyaniline 12 is provided. The change characteristic shown in FIG. 7 shows the case where the polyaniline 12 and the discharge portions 14 and 15 are provided at one place.
[0046]
According to this, only the polyaniline 12 shown in (2) in the figure generates almost no hydroxyl radical (OH.), And the polyaniline 12 shown in (3) in the figure and the discharge portions 14 and 15 are provided at one place. It was found that the generation of hydroxyl radical (OH.) Was increasing.
[0047]
Further, FIG. 5 shows the comparison between the presence / absence of polyaniline 12 and the generation of hydroxy radicals (OH.) When the number of discharge units 14 and 15 is changed, obtained from the change characteristics of absorbance. The change characteristic indicated by (1) in the figure shows the case where the polyaniline 12 and the discharge portions 14 and 15 are not provided, and the change characteristic indicated by (2) in the diagram shows that the discharge portions 14 and 15 The change characteristic indicated by (3) in the figure shows the change characteristic indicated by (3) in the figure when the polyaniline 12 was not provided, and the discharge portions 14 and 15 were disposed only in two places, and the change characteristic indicated by (4) in the figure. Shows the case where the polyaniline 12 and the two discharge portions 14 and 15 are provided.
[0048]
According to this, as in the present embodiment, by disposing the polyaniline 12 and the discharge portions 14 and 15 in two places indicated by (4) in the figure, more hydroxyl radicals (OH.) Are generated. It turned out to be obtained.
[0049]
According to the water treatment apparatus 10 of the above embodiment, the two first and second discharge units 14 and 15 are disposed in the water pipe 11 on which the polyaniline 12 is formed, and the first discharge unit 14 on the upstream side is disposed. After the oxygen active species and the dissolved oxygen (O ₂ ) are generated from the water to be treated by the discharge and supplied to the polyaniline 12, more oxygen active species are generated by the discharge of the second discharge unit 15 on the downstream side. By decomposing contaminants in the water to be treated and sterilizing microorganisms, the first discharge unit 14 generates hydroxyl radicals (OH.) And dissolved oxygen (O ₂ ), which are oxygen active species, and the polyaniline 12 dissolved oxygen _{(O 2)} from superoxide oxygen active species (O · ₂ ^-) is generated, and superoxide by the second discharging unit 15 ^- Hidoroshikirajika from (O · ₂₎ (OH.) Is generated.
[0050]
Hydroxyl radical (OH.) Is an oxygen-active species that is particularly excellent in bactericidal reaction characteristics and oxidative power. Therefore, it decomposes chemical substances such as organic substances and kills microorganisms such as bacteria and phytoplankton. You can kill.
[0051]
In addition, in the discharge of the first and second discharge units 14 and 15, a hydroxyl radical (OH.) Is directly generated from the water to be treated, whereby the organic matter in the water to be treated is oxidized and decomposed.
[0052]
Further, the circulation of the water to be treated is swirled by the swirling means 13 so that the dissolved oxygen (O ₂ ) in the water to be treated is uniformly supplied to the polyaniline 12, so that the superoxide (O · ₂ ⁻ ) of the polyaniline 12 is produced. Can be performed without interruption.
[0053]
In addition, by causing the water to be treated flowing through the water pipe 11 to flow upward from below, bubbles generated by the first discharge unit 14 are sent to the second discharge unit 15, and the second discharge unit 15 also performs When a discharge occurs on the surface of the bubble, further hydroxyl radical (OH.) Can be generated.
[0054]
In addition, since the water pipe 11 and the plurality of first and second discharge units 14 and 15 are provided in parallel with each other, the purification capacity of the water to be treated can be increased.
[0055]
(Other embodiments)
In the above embodiment, the two first and second discharge units 14 and 15 are provided in the water pipe 11 on which the polyaniline 12 is formed. However, the present invention is not limited to this. , 15 may be arranged in multiple stages.
[0056]
In the above embodiment, the description has been given of the combination of the water treatment device 10 and the water storage tank 20 for storing the water to be treated. However, the present invention is not limited to this. The water to be treated may be supplied.
[0057]
Further, in the above embodiment, the description has been made by applying the present invention to the water treatment apparatus 10 for purifying the water to be treated contaminated in a closed water area (for example, a lake, a marsh, an inner bay). The present invention may be applied to the purification of ballast water for maintaining the stability of tankers and cargo ships. At this time, it is possible to kill and kill microorganisms such as shellfish poison plankton contained in seawater.
[0058]
In addition to the closed water area and ballast water, the present invention can also be applied to the purification of drainage water and domestic wastewater from a combined septic tank that performs chlorination.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating an overall configuration of a water treatment apparatus 10 according to an embodiment of the present invention.
FIG. 2 is a configuration diagram illustrating an internal configuration of a water pipe according to an embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an oxidation mechanism of an organic substance by first and second discharge units 14 and 15 according to an embodiment of the present invention.
FIG. 4 is a characteristic diagram showing a relationship between absorbance and wavelength in one embodiment of the present invention.
FIG. 5 is a characteristic diagram showing a relationship between absorbance and wavelength in one embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Water pipe 12 ... Polyniarin 13 ... Swirling means 14 ... 1st discharge part (discharge part)
15 Second discharge part (discharge part)
OH ... hydroxy radical

Claims (7)

A discharge unit (14, 15) for applying a high-voltage pulse is disposed in a water pipe (11) through which polyaniline (12) for generating oxygen active species is formed on the inner wall and through which water to be treated flows. A water treatment method for electrochemically treating
At least two or more discharge units (14, 15) are disposed in the water pipe (11), and an oxygen-active species and oxygen are generated from the water to be treated by a first discharge unit (14) on the upstream side to form the polyaniline. After being supplied to (12), more oxygen active species are generated by the second discharge section (15) on the downstream side to decompose pollutants in the water to be treated and kill microorganisms. Water treatment method. The water treatment method according to claim 1, wherein the water to be treated is swirled upward from below by a swirling means (13). 2. The water treatment method according to claim 1, wherein hydroxyl radicals (OH.) Are mainly generated from the oxygen-activated species in the water pipe by the discharge units. . In a water treatment apparatus for electrochemically treating the water to be treated,
A polyaniline (12) for producing oxygen active species formed on the inner wall, and a water pipe (11) through which the water to be treated flows upward from below,
A discharge unit (14, 15) disposed in the water pipe (11) for applying a high-voltage pulse to the water to be treated to generate shock waves and ultraviolet rays;
At least two discharge units (14, 15) are disposed in the water pipe (11), and the first discharge unit (14) on the upstream side generates oxygen active species and oxygen from the water to be treated, and After being supplied to the polyaniline (12), more oxygen active species are generated by the second discharge section (15) on the downstream side to decompose contaminants in the water to be treated and sterilize microorganisms. A water treatment apparatus characterized by the above-mentioned. The water treatment apparatus according to claim 4, wherein the water pipe (11) is provided with a swirling means (13) so as to swirl the water to be treated. 5. The water treatment apparatus according to claim 4, wherein a plurality of the water pipes (11) and the discharge units (14, 15) are provided in parallel with each other. 6. The discharge section (14, 15) according to any one of claims 4 to 6, wherein, among the oxygen activated species, hydroxy radicals (OH •) are mainly generated from the water to be treated. A water treatment apparatus as described in the above.

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