JP2011131118A - Method and apparatus for preparing spray water for plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel apparatus and method that facilitate preparation of spray water for plants. <P>SOLUTION: An apparatus 100 for preparing spray water for plants is composed of a processing vessel 10, a group 20 of electrodes arranged in the processing vessel 10, and a power source for applying voltage to the group 20 of electrodes. The group 20 of electrodes includes an ion adsorption electrode 21 containing a conductive substance capable of reversibly adsorbing ions and the counter electrode 22. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for preparing spray water for plants.

  In order to control the disease of a plant, the method of spraying acidic aqueous solution or acidic electrolyzed water is proposed conventionally (patent documents 1-3). Patent Document 1 discloses a method in which an acidic aqueous solution having a bactericidal action against crop pathogens is sprayed on crops. Patent Document 2 discloses a method of spraying acidic electrolyzed water containing hypochlorous acid.

Japanese Patent Laid-Open No. 5-194109 JP 2001-247420 A JP 2001-261512 A

  Conventionally, however, acidic electrolyzed water has been obtained by electrolysis using a membrane such as an ion exchange membrane, and therefore maintenance of the membrane has been required periodically. Further, in the system using a diaphragm, it is necessary to make the salt concentration of water before electrolysis relatively high, and there is a risk of salt damage. In order to avoid this, an apparatus using two diaphragms is also used, but the maintenance labor and cost increase due to the two diaphragms are unavoidable. As described above, an apparatus capable of easily obtaining acidic electrolyzed water such as complicated maintenance has not been proposed so far, and the above method could not be easily carried out.

  Under such circumstances, an object of the present invention is to provide a novel apparatus and method capable of easily preparing spray water for plants.

  In order to achieve the above object, an apparatus of the present invention for preparing spray water for plants includes a treatment tank, an electrode group disposed in the treatment tank, and a power source for applying a voltage to the electrode group. The electrode group includes an ion-adsorbing electrode including a conductive material capable of reversibly adsorbing ions and a counter electrode.

  In this specification, “spread water” includes water supplied to the roots of plants in hydroponics. In this specification, “spread water (for plants)” can be read as “water supplied to plants” or “water supplied to plants for the purpose of controlling pests”.

  Moreover, the method of this invention for preparing the spray water for plants is connected to the electrode group which includes (i) a treatment tank, an ion adsorption electrode and a counter electrode arranged in the treatment tank, and the electrode group. And (ii) changing the pH of the aqueous liquid by applying a voltage to the ion-adsorbing electrode and the counter electrode while flowing the aqueous liquid in the treatment tank, The ion adsorption electrode includes a conductive substance capable of reversibly adsorbing ions.

  According to the present invention, water having an effect of controlling plant pests can be easily prepared. The alkaline water / acidic water prepared by the method of the present invention can be applied to plant seedlings, leaves, stems, roots, and the like.

It is a schematic diagram which shows an example of the apparatus of this invention. It is a schematic diagram which shows another example of the apparatus of this invention. It is a schematic diagram which shows an example of operation | movement of the apparatus shown in FIG. It is a schematic diagram which shows another example of operation | movement of the apparatus shown in FIG. It is a schematic diagram which shows another example of the apparatus of this invention.

  Hereinafter, embodiments of the present invention will be described. In the following description, embodiments of the present invention will be described by way of examples, but the present invention is not limited to the examples described below. In the following description, specific numerical values and specific materials may be exemplified, but other numerical values and other materials may be applied as long as the effect of the present invention is obtained.

(Spray water preparation device)
The apparatus of the present invention is an apparatus for preparing spray water for plants. This apparatus can be used in the method of the present invention described later. This apparatus includes a processing tank, an electrode group disposed in the processing tank, and a power source for applying a voltage to the electrode group. The electrode group includes an ion adsorption electrode including a conductive material capable of reversibly adsorbing ions and a counter electrode.

  There is no particular limitation on the treatment tank (electrolysis tank), and a tank similar to a general electrolytic tank can be used.

  In a preferred example of the electrode group, a plate-like ion adsorption electrode and a plate-like counter electrode are arranged in parallel. One electrode group may include a plurality of ion adsorption electrodes, and one electrode group may include a plurality of counter electrodes. In a preferred example, a plurality of plate-like ion adsorption electrodes and a plurality of plate-like counter electrodes are arranged in parallel and alternately. In a preferred example, the plate-like electrodes (ion adsorption electrode and counter electrode) are arranged so that their surface directions are parallel to the vertical direction.

  One electrode group may include a plurality of electrode pairs arranged in different directions. Each electrode pair includes a plate-like ion adsorption electrode and a plate-like counter electrode arranged in parallel. For example, one electrode group may include a plurality of electrode pairs arranged in directions orthogonal to each other. When a plurality of ion adsorption electrodes and a plurality of counter electrodes are included in one electrode group, they may be connected in parallel (one ion adsorption electrode and each counter electrode are connected) in one electrode group. .

  The ion adsorption electrode includes a conductive substance capable of reversibly adsorbing ions (hereinafter sometimes referred to as “conductive substance (C)”). The ion adsorption electrode may include a current collector that supports the conductive substance (C) or a current collector attached to the conductive substance (C).

  The conductive substance (C) is a substance that can adsorb and release ions reversibly. That is, the conductive substance (C) can release the adsorbed ions. As the conductive material (C), a material having a large specific surface area can be used. In a preferred example, the conductive substance (C) includes a carbon material such as activated carbon or graphite. The conductive material (C) may be a conductive sheet formed by agglomerating granular activated carbon. Further, the conductive substance (C) may be a conductive sheet formed by aggregating granular activated carbon and conductive carbon. The conductive substance (C) may be an activated carbon block formed by solidifying activated carbon particles. Further, the conductive substance (C) may be an activated carbon fiber cloth, that is, a cloth formed using the activated carbon fiber. As the activated carbon fiber cloth, for example, ACC5092-10, ACC5092-15, ACC5092-20, and ACC5092-25 manufactured by Nihon Kynol Co., Ltd. may be used.

The specific surface area of the conductive substance (C) is, for example, 300 m ² / g or more, and preferably 900 m ² / g or more. The upper limit of the specific surface area is not particularly limited, but may be, for example, 3000 m ² / g or less or 2500 m ² / g or less. The “specific surface area” of the conductive substance (C) can be usually measured by a BET method using nitrogen gas.

  An example of the counter electrode is a metal electrode. A preferred example of the counter electrode is an electrode on the surface of which a metal (for example, platinum) that easily undergoes electrolysis of water is present. For example, as the counter electrode, an electrode made of titanium, an electrode made of platinum, or an electrode made of a metal coated with platinum (for example, any metal such as titanium, niobium, or tantalum) can be used. As the counter electrode, a metal sheet may be used, a metal wire may be used, or a plurality of connected metal wires may be used. A preferred example of the counter electrode is an electrode formed by arranging metal wires in a flat plate shape.

Unlike the conductive substance (C), the surface area of the counter electrode may not be large. Surface area per gram of an example of the counter electrode may also be 100 m ² or less, may be in the range of 5 × 10 ^-5 ~50m ^2.

  The power supply is a power supply (DC power supply) for applying a voltage (DC voltage) between the ion adsorption electrode and the counter electrode. The power source may be an AC-DC converter that converts an AC voltage from an outlet into a DC voltage. The power source may be a power generation device such as a solar cell or a fuel cell, or a secondary battery. By using a power generation device or a secondary battery as a power source, the device of the present invention can be used in regions and situations where power is not supplied.

  In the apparatus of the present invention, an aqueous liquid is processed. In this specification, the “aqueous liquid” is a liquid whose solvent is water, and includes water and aqueous solutions.

  In the apparatus of this invention, the water intake may be formed in the lower part of a processing tank, and the drain outlet may be formed in the upper part of a processing tank. In this case, the aqueous liquid to be treated flows from the lower part of the treatment tank and is discharged from the upper part of the treatment tank. That is, in this case, the aqueous liquid flows from the lower side toward the upper side. By this flow, the gas generated on the surface of the electrode is quickly discharged to the upper part of the treatment tank. Therefore, according to this configuration, it is possible to suppress a decrease in reaction rate and efficiency due to the gas generated on the surface of the electrode.

  Consider the case where the electrodes are arranged so that the plane direction of the flat electrodes (ion adsorption electrode and counter electrode) is parallel to the vertical direction. In this case, the aqueous liquid may flow upward from the lower side of the processing tank or may flow downward from the upper side of the processing tank. When flowing an aqueous liquid slowly in a processing tank, it is easy to flow between electrodes uniformly by flowing an aqueous liquid upwards from the bottom of a processing tank.

  The apparatus of the present invention may further include a dispersing means for dispersing the liquid flow. The dispersing means is disposed in the treatment tank and between the water intake and the electrode group. The dispersion means can suppress the uneven flow of the liquid between the electrodes. As the dispersing means, for example, a porous film or plate, or a film or plate in which a large number of through holes are formed can be used.

  In the apparatus of the present invention, a drain port is usually formed in the treatment tank. The apparatus of the present invention may further include first and second flow paths connected to the drain port and switching means for switching the drain path to one of the first and second flow paths. According to this configuration, acidic water and alkaline water obtained by the treatment can be easily separated. For example, a container for storing acidic water may be connected to the first flow path, and a container for storing alkaline water may be connected to the second flow path.

  The apparatus of the present invention may include a plurality of treatment tanks and a plurality of electrode groups. In that case, an electrode group is arranged in each of a plurality of processing tubs. The plurality of electrode groups may be connected in series. That is, the ion adsorption electrode of one electrode group may be connected to the counter electrode of another one electrode group. By connecting a plurality of electrode groups in series, the amount of electricity flowing in each treatment tank can be made the same. This can produce the same hydrogen ion or hydroxyl ion. Moreover, it is possible to make the electric current value which flows through each processing tank low compared with the case where only one processing tank is used. By reducing the current value, it is possible to make the wiring thinner or to reduce the size of the junction of the wiring, thereby simplifying the device and improving the power efficiency. Note that the plurality of electrode groups may be connected in parallel. Maintenance of equipment can be facilitated by making a combination of small containers having a function equivalent to that of a large apparatus.

  The distance between the ion adsorption electrode and the counter electrode may be in the range of 0.2 cm to 2 cm. The distance may be in other ranges, for example, in the range of 2 cm to 30 cm. By narrowing the electrode interval, the applied voltage can be lowered. When the current flowing between the electrodes is the same, the power consumption can be suppressed by reducing the applied voltage.

  The apparatus of the present invention may further include an apparatus for adding salt to the water to be treated. Examples of added salts include hydrochlorides such as potassium chloride, sodium chloride, magnesium chloride, sulfates such as potassium sulfate sodium sulfate, magnesium sulfate, phosphates, nitrates, organic acid salts, and mixtures thereof. included. By using a salt containing potassium, it is possible to spray potassium together with pest control. The three major nutrients of nitrogen, phosphorus and potassium are essential for crop growth. Moreover, the spray water containing hypochlorous acid can be prepared by using the salt containing chlorine. Hypochlorous acid may be effective in controlling pests. Therefore, it is effective to use a salt in which an appropriate amount of potassium ion, phosphate ion, nitrate ion and chlorine ion is mixed. In a conventional electrolysis apparatus using an ion exchange membrane, sufficient ion exchange ability may not be exhibited when specific ions are used. However, in the apparatus of the present invention, since there is no such restriction, various ions can be used.

  The salt concentration of water to which salt is added is not particularly limited, and may be in the range of 0.01% by weight to 3% by weight (for example, in the range of 0.05% by weight to 0.2% by weight). When sprayed water also serves as a fertilizer, the concentration of salt (for example, potassium salt) may be increased to some extent. However, when sprayed water is applied to the leaves, salt damage may occur, so it is desirable that the salt concentration is not high.

  In a conventional electrolysis apparatus using a diaphragm such as an ion exchange membrane, the salt concentration of water before treatment needs to be relatively high. In contrast, the apparatus of the present invention using an ion adsorption electrode and a counter electrode can sufficiently change the pH even with water having a low salt concentration (for example, tap water). Specifically, it is possible to sufficiently change the pH by treating water having a conductivity in the range of 50 μS / cm to 500 μS / cm (for example, 200 μS / cm or less). For example, by treating 180 μS / cm tap water, it is possible to prepare acidic water having a pH of 2.6 to 5 or alkaline water having a pH of 9 to 11.7. The occurrence of salt damage can be suppressed by using water having a low salt concentration. However, the rate of change in pH can be increased by adding salt to the water to be treated. Therefore, salt may be added to the water to be treated. The apparatus for adding salt may add salt to water at a constant rate. Further, the salt may be added by putting the salt or a solid substance containing the salt into a water path or a tank.

  The device of the present invention may include other elements as required, and may include, for example, a safety device, a pump, a valve, a pH sensor, a conductivity sensor, and the like.

(Spray water preparation method)
The method of the present invention is an apparatus for preparing spray water for plants. This method can be easily carried out by using the apparatus of the present invention. In addition, since the matter demonstrated about the apparatus of this invention is applicable to the method of this invention, the overlapping description may be abbreviate | omitted. Further, the matters described for the method of the present invention can be applied to the apparatus of the present invention. The method of the present invention includes the following steps (i) and (ii).

  In step (i), a treatment tank, an electrode group including an ion adsorption electrode and a counter electrode arranged in the treatment tank, and a power source connected to the electrode group are prepared. In a typical example, the apparatus of the present invention is prepared. As described above, the ion adsorption electrode includes a conductive substance (C) capable of reversibly adsorbing ions.

  In step (ii), the pH of the aqueous liquid is changed by applying a voltage (DC voltage) to the ion adsorption electrode and the counter electrode while flowing the aqueous liquid in the treatment tank. In step (ii), a voltage is applied between the electrodes so that water is electrolyzed at the counter electrode. Thereby, the aqueous liquid becomes acidic water or alkaline water.

For example, when a voltage is applied so that the ion adsorption electrode becomes an anode (anode), anions in water (for example, anions other than hydroxide ions) are adsorbed on the conductive substance (C) of the ion adsorption electrode. The On the other hand, water is electrolyzed at the counter electrode, and hydrogen gas and hydroxide ions (OH ⁻ ) are generated. As a result, the pH of the water rises and alkaline water is prepared. According to the method of the present invention, alkaline water having a high reducing power can be obtained. For example, alkaline water having an oxidation-reduction potential (ORP) in the range of −850 mV to −910 mV can be obtained.

On the other hand, when a voltage is applied so that the ion adsorption electrode becomes a cathode (cathode), cations in water (for example, cations other than hydrogen ions) are adsorbed on the conductive substance (C) of the ion adsorption electrode. On the other hand, water is electrolyzed at the counter electrode, and oxygen gas and hydrogen ions (H ⁺ ) are generated. As a result, the pH of the water decreases and acidic water is prepared. According to the method of the present invention, acidic water having high oxidizing power can be obtained. For example, it is possible to obtain acidic water having an oxidation-reduction potential (ORP) in the range of +1000 mV to +1150 mV.

  In addition, when a voltage is applied so that the ion adsorption electrode becomes a cathode while the anion adsorption electrode is adsorbed, a reaction in which the adsorbed anion is released into water also occurs. In addition, when a voltage is applied so that the ion adsorption electrode serves as an anode in a state where cations are adsorbed on the ion adsorption electrode, a reaction in which the adsorbed cations are released into water also occurs. In any case, when a voltage is applied so that the ion-adsorbing electrode becomes an anode, the pH of water increases, and when a voltage is applied so that the ion-adsorbing electrode becomes a cathode, the pH of water decreases. The obtained acidic water and alkaline water can be used as spray water for controlling plant pests, respectively.

  The voltage to be applied is not particularly limited as long as the voltage causes water electrolysis at the counter electrode. In one example, the applied voltage is in the range of 3 to 30 volts. When applying a voltage, a constant voltage may be applied, or a voltage may be applied so that a constant current flows between the electrodes. Moreover, the pH of the prepared spray water may be monitored and the voltage may be changed according to the pH.

  According to the apparatus and method of the present invention, acidic water having a pH in the range of 2.6 to 5 and alkaline water having a pH in the range of 9 to 11.7 are prepared from normal water such as tap water. It is possible. It is also possible to prepare acidic water having a pH of 2.6 or less and alkaline water having a pH of 11.7 or more by treating salt water.

  In the method of the present invention, in step (ii), the aqueous liquid may be introduced from the lower side of the treatment tank and the aqueous liquid may be discharged from the upper side of the treatment tank. According to this configuration, the gas generated on the surface of the electrode can be quickly discharged upward.

  In the method of the present invention, the aqueous liquid treated in step (ii) may be distributed according to the voltage application direction in step (ii). In this configuration, the acidic water obtained in step (ii) and the alkaline water obtained in step (ii) are separated.

  In the method of the present invention, in the step (i), a plurality of treatment tanks and a plurality of electrode groups may be prepared, and the electrode groups may be arranged in each of the plurality of treatment tanks. In step (ii), a voltage may be applied with a plurality of electrode groups connected in series.

  The distance between the ion adsorption electrode and the counter electrode may be in the range of 0.2 cm to 2 cm.

An example of the apparatus and method of the present invention will be described below with reference to the drawings. In the following figures, cations other than hydrogen ions (H ⁺ ) in the aqueous liquid may be displayed as “L ⁺ ” regardless of the valence. In addition, anions other than hydroxide ions (OH ⁻ ) in an aqueous liquid may be displayed as “L ⁻ ” regardless of the valence. Moreover, in the following description, the same code | symbol may be attached | subjected to the same part and the overlapping description may be abbreviate | omitted.

(Embodiment 1)
The structure of the apparatus 100 of Embodiment 1 for preparing spray water is typically shown in FIG. The apparatus 100 includes a processing tank 10, a power supply 11, a switch 12, a pump 13, a valve 14, a flow path switching valve 15, containers 16 and 17, a controller 18, and an electrode group 20. The electrode group 20 is disposed in the treatment tank 10.

The power supply 11 is an AC-DC converter (DC power supply). The switch 12 is a switch for switching the voltage application direction, and is configured by relays 12a and 12b. The controller 18 is connected to the power source 11, the switch 12, the pump 13, the valve 14, and the flow path switching valve 15, and controls them. A water intake 10 a is formed in the lower part of the treatment tank 10, and a drain port 10 b is formed in the upper part of the treatment tank 10. A container (not shown) containing an aqueous solution 25 to be treated is connected upstream of the pump 13. The aqueous solution 25 is salt water containing a cation (L ⁺ ) and an anion (L ⁻ ). The aqueous solution 25 is sent to the treatment tank 10 by the pump 13 through the water intake 10a. The aqueous solution 25 treated in the treatment tank 10 is discharged from the drain port 10b.

  The electrode group 20 includes a flat ion adsorption electrode 21 and a flat counter electrode 22. The ion adsorption electrode 21 includes a conductive material (not shown) capable of reversibly adsorbing ions. The ion adsorption electrode 21 and the counter electrode 22 are arranged in parallel. The electrode group 20 may include a plurality of ion adsorption electrodes 21 and a plurality of counter electrodes 22. An example of such a device is shown in FIG. In the example of FIG. 2, the electrode group 20 includes two plate-like ion adsorption electrodes 21 and two plate-like counter electrodes 22. The two flat ion adsorption electrodes 21 and the two flat counter electrodes 22 are arranged alternately and in parallel.

  An example of processing in the apparatus 100 of FIG. 1 will be described with reference to FIGS. 3 and 4. 3 and 4 may schematically show a part of the apparatus.

In this example, first, an alkaline water preparation step is performed. Specifically, a voltage is applied between the ion adsorption electrode 21 and the counter electrode 22 so that the ion adsorption electrode 21 becomes an anode while the aqueous solution 25 flows through the treatment tank 10. At this time, a voltage is applied so that water is electrolyzed on the surface of the counter electrode 22. By applying this voltage, as shown in FIG. 3, the anions (L ⁻ ) in the aqueous solution 25 are adsorbed to the conductive substance (not shown) of the ion adsorption electrode 21. On the other hand, water is electrolyzed at the counter electrode 22 to generate hydrogen gas and hydroxide ions (OH ⁻ ). As a result, the aqueous solution 25 becomes an alkaline aqueous solution. The obtained alkaline water has a reducing power. The alkaline water is introduced into the container 16 by the flow path switching valve 15.

  Next, a cleaning process is performed. Specifically, the aqueous solution 25 is allowed to pass through the treatment tank 10 for a certain period of time while the voltage application is stopped. The aqueous solution 25 at this time may be put in the container 16 or drained from a drainage channel (not shown) connected to the channel switching valve 15. By this operation, the alkaline water in the treatment tank 10 can be discharged and then the next operation can be performed.

Next, an acidic water preparation step is performed. A voltage is applied between the ion adsorption electrode 21 and the counter electrode 22 so that the ion adsorption electrode 21 becomes a cathode while the aqueous solution 25 flows through the treatment tank 10. At this time, a voltage is applied so that water is electrolyzed on the surface of the counter electrode 22. By applying this voltage, as shown in FIG. 4, the negative ions (L ⁻ ) adsorbed on the ion adsorption electrode 21 are released into the aqueous solution 25. On the other hand, water is electrolyzed at the counter electrode 22 to generate oxygen gas and hydrogen ions (H ⁺ ). As a result, the aqueous solution 25 becomes an acidic aqueous solution. The obtained acidic water has an oxidizing power. This acidic water is introduced into the container 17 by the flow path switching valve 15.

  Next, a cleaning process is performed. Specifically, the aqueous solution 25 is allowed to pass through the treatment tank 10 for a certain period of time while the voltage application is stopped. The aqueous solution 25 at this time may be put in the container 17 or drained from a drainage channel (not shown) connected to the channel switching valve 15. By this operation, it is possible to move to the next operation after discharging the acidic water in the treatment tank 10.

  Thereafter, the alkaline water preparation step and the acidic water preparation step are alternately repeated. The above-described cleaning process is performed between these processes. In this way, alkaline water can be stored in the container 16 and acidic water can be stored in the container 17. The alkaline water and acidic water stored in the containers 16 and 17 can be sprayed on the plants, respectively. In addition, in order to neutralize the sprayed water, the prepared alkaline water and acidic water may be sprayed alternately.

  The hydrogen gas generated when preparing the alkaline water is preferably moved to the container 16 together with the prepared alkaline water so as not to be exposed to air. Thereby, the oxidation-reduction potential in a state where dissolved hydrogen is saturated can be maintained. That is, a reduction in the reducing power of alkaline water can be suppressed. Similarly, it is preferable that the oxygen gas generated when preparing acidic water is moved to the container 17 together with the prepared acidic water so as not to be exposed to air. Thereby, the oxidation-reduction potential in a state where dissolved oxygen is saturated can be maintained. That is, a decrease in the oxidizing power of acidic water can be suppressed.

  An example of the control of the voltage application direction and the connection destination of the flow path switching valve 15 is shown in Table 1. Table 1 shows one cycle including a voltage application for 5 minutes, a cleaning process for 1 minute, a voltage application for 5 minutes (reverse direction), and a cleaning process for 1 minute. Usually, this cycle is repeated.

In addition, you may apply a voltage so that the ion adsorption electrode 21 may become a cathode initially. In that case, cations (L ⁺ ) are adsorbed on the ion adsorption electrode 21, and the aqueous solution 25 becomes an acidic aqueous solution. Next, when the voltage application direction is reversed, the cation (L ⁺ ) adsorbed on the ion adsorption electrode 21 is released, and the aqueous solution 25 becomes an alkaline aqueous solution.

  When water was treated by the method of the present invention, acidic water having a pH of 3 or less and alkaline water having a pH of 11 or more were obtained. When these acidic water and alkaline water were sprayed on the strawberry leaves in this order, the leaves that had been weakened by the pests recovered and good strawberries were born.

(Embodiment 2)
In the second embodiment, an example of an apparatus including a plurality of treatment tanks 10 and a plurality of electrode groups 20 will be described. The apparatus 200 of Embodiment 2 is shown in FIG. The apparatus 200 includes a plurality of processing tanks 10, a power source 11, a switch 12, a pump 13, a valve 14, a flow path switching valve 15, containers 16 and 17, a controller 18 (not shown), and a plurality of electrode groups 20. Since they have been described in the first embodiment, redundant description is omitted. Similar to the apparatus 100, the controller 18 is connected to the power source 11, the switch 12, the pump 13, the valve 14, and the flow path switching valve 15, and controls them.

  The plurality of electrode groups 20 are connected in series. Specifically, the ion adsorption electrode 21 of one electrode group 20 is connected to the counter electrode 22 of the adjacent electrode group 20. In the plurality of treatment tanks 10, the ion adsorption electrodes 21 are connected in parallel, and the counter electrodes 22 are connected in parallel.

  In the device 200 as well, the same processing as that of the device 100 is performed. As a result, alkaline water is stored in the container 16, and acidic water is stored in the container 17.

  The apparatus 200 includes four treatment tanks 10 and four electrode groups 20. Therefore, when the throughput of the aqueous solution 25 per unit time is the same, the area of one ion adsorption electrode 21 and one counter electrode in the apparatus 200 is four minutes of the area of one ion adsorption electrode 21 and one counter electrode in the apparatus 100. Of 1. As a result, the current value flowing between the electrodes in the device 200 can be reduced to a quarter of that of the device 100. Therefore, in the apparatus 200, there are few restrictions on the structure of the apparatus, and maintenance such as electrode replacement becomes easy.

  Note that the main part of the apparatus of the present invention can also be applied to disinfection and cleaning of articles. Specifically, a cleaning tank is disposed instead of the flow path switching valve 15, and an article to be disinfected / cleaned is disposed in the cleaning tank. By supplying the acidic water / alkaline water prepared in the treatment tank 10 to the cleaning tank alternately, the article can be disinfected and cleaned. For example, articles such as knives and cutting boards can be easily disinfected and cleaned.

  Although the embodiments of the present invention have been described above by way of examples, the present invention is not limited to the above-described embodiments, and can be applied to other embodiments based on the technical idea of the present invention.

  INDUSTRIAL APPLICATION This invention can be utilized for the preparation apparatus and preparation method of the spray water for plants. By spraying the water prepared in the present invention, a part of plant pests can be controlled.

DESCRIPTION OF SYMBOLS 10 Treatment tank 11 Power supply 12 Switch 13 Pump 14 Valve 15 Flow path switching valve 16, 17 Container 18 Controller 20 Electrode group 21 Ion adsorption electrode 22 Counter electrode 100 Apparatus

Claims (11)

An apparatus for preparing spray water for plants,
A treatment tank;
An electrode group disposed in the treatment tank;
A power source for applying a voltage to the electrode group,
The said electrode group is a spray water preparation apparatus containing the ion adsorption electrode containing the electroconductive substance which can adsorb | suck a ion reversibly, and a counter electrode.   The apparatus according to claim 1, wherein a water intake port is formed at a lower portion of the treatment tank, and a water discharge port is formed at an upper portion of the treatment tank. Further comprising dispersing means for dispersing the liquid flow;
The apparatus according to claim 1, wherein the dispersion unit is disposed in the treatment tank and between the water intake and the electrode group. A drain outlet is formed in the treatment tank,
The apparatus according to claim 1, further comprising first and second flow paths connected to the drain port, and switching means for switching the drain path to one of the first and second flow paths. Including a plurality of the treatment tanks and a plurality of the electrode groups,
The electrode group is disposed in each of the plurality of treatment tanks,
The device according to claim 1, wherein the plurality of electrode groups are connected in series.   The apparatus according to any one of claims 1 to 5, wherein a distance between the ion adsorption electrode and the counter electrode is in a range of 0.2 cm to 2 cm. A method of preparing spray water for plants,
(I) preparing an electrode group including a treatment tank, an ion adsorption electrode and a counter electrode arranged in the treatment tank, and a power source connected to the electrode group;
(Ii) changing the pH of the aqueous liquid by applying a voltage to the ion adsorption electrode and the counter electrode while flowing the aqueous liquid in the treatment tank,
The said ion adsorption electrode is a sprayed water preparation method containing the electroconductive substance which can adsorb | suck a ion reversibly.   The method according to claim 7, wherein in the step (ii), the aqueous liquid is introduced from a lower side of the treatment tank and the aqueous liquid is discharged from an upper side of the treatment tank.   The method according to claim 7 or 8, wherein the aqueous liquid treated in the step (ii) is distributed according to a voltage application direction in the step (ii). In the step (i), a plurality of the treatment tanks and a plurality of the electrode groups are prepared, and the electrode groups are arranged in each of the plurality of treatment tanks,
The method according to claim 7, wherein in the step (ii), a voltage is applied in a state where the plurality of electrode groups are connected in series.   The method according to any one of claims 7 to 10, wherein a distance between the ion adsorption electrode and the counter electrode is in a range of 0.2 cm to 2 cm.

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