JP2714662B2 - Method and apparatus for producing sterile water - Google Patents

Description

The present invention relates to water for food processing, pool water for swimming, water in a water storage tank installed in a building, a cooler for air conditioning, and a cooler. The present invention relates to a method and an apparatus for producing aseptic water in a case where sterile or bacteriostatic water treatment of cooler water or the like used in a box is preferable.

[Prior Art] Generally, water is desirably neutral aseptic water free of various bacteria and the like, from food processing water to swimming pool water and drinking water. In particular, these general waters are required to be neutral in accordance with the requirements of the Water Supply Law, etc., and are required to be neutral under the requirements of food hygiene guidance. In addition, it is required that the facility generate a large amount of water at a flow rate desired for use.

[Problems to be Solved by the Invention] However, the electric conductivity of raw water varies from region to region, and the same tap water may change in the morning and evening. And it was difficult to produce stable neutral sterile water. In addition, the technology for producing a large amount of neutral aseptic water in a simple single facility under flowing water conditions is difficult as a practical matter, and there has been no other way than to sterilize the water by injecting at most a chemical agent etc. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method and apparatus for producing aseptic water that can be sterilized and neutralized with simple equipment while being in flowing water at room temperature. And

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method in which treated water is placed in an electrolytic cell in which an anode chamber and a cathode chamber are formed by partitioning an anode and a cathode with a diaphragm. And then neutralized by flowing to the cathode chamber, and the anode is placed on the periphery and the cathode is arranged in the center, and the electrolyte is separated by a diaphragm. A tank, treated water supply means for supplying treated water into the anode chamber of the electrolytic cell, a circulation path for introducing treated water in the anode chamber into the cathode chamber, a discharge path for discharging treated water in the cathode chamber, and an anode. And a power supply for applying a DC voltage between the cathodes.

That is, the invention according to claim 1 of the present application is directed to a method for producing aseptic water, wherein treated water is flowed into an anode chamber in an electrolytic cell in which an anode and a cathode are partitioned by a diaphragm to form an anode chamber and a cathode chamber. It is characterized in that it is acidified to make it sterile water, and then it is made to flow into a cathode chamber for neutralization. The invention according to claim 2 of the present application is directed to an apparatus for producing sterile water, wherein an electrolytic cell having an anode cylinder on the peripheral surface and a cathode disposed in the center and having a diaphragm interposed therebetween, A treated water supply means for supplying treated water into the anode chamber, a circulation path for introducing acidified treated water in the anode chamber into the cathode chamber, a drainage path for discharging treated water in the cathode chamber, and between the anode and the cathode. And a power supply for applying a DC voltage.

[Action] According to the above configuration, the acidic water flowing out of the anode chamber of the electrolytic cell is introduced into the cathode chamber, and neutral water is generated in the electric field.
In the electric field, the ecosystem of bacteria is destroyed, sterilization and bacteriostasis are made possible, and stable generation of electrolyzed water can be performed in a flowing state to produce a large amount of sterile water with neutral water.

When the electrical conductivity of raw water is high using ordinary water containing ordinary bacteria as the treated water, a large amount of sterile water in flowing water without operating the addition device, and when the electrical conductivity is low, Increases the electric conductivity of raw water with an inorganic liquid, particularly preferably NaCl or the like, and generates a large amount of sterile water in flowing water.

EXAMPLES Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the accompanying drawings, reference numeral 1 denotes an electrolytic cell, which comprises a bottom plate portion 2 and a cover plate portion 4 each made of a non-conductive material, and an anode 3 made of stainless steel or the like forming a cylindrical outer periphery therebetween. The cover plate 4 includes a cathode 5 extending into the electrolytic cell 1 and a power source 23.
A cathode terminal 6 for connecting to
The anode 3 has an anode terminal 7 connected to a power source 23.
Is arranged. Further, the electrolytic cell 1 is provided with a cylindrical diaphragm 8 surrounding the cathode 5, and the inside of the electrolytic cell 1 is partitioned into a cathode chamber 9 and an anode chamber 10 by the diaphragm 8. The bottom plate 2 has an inlet 14 for supplying treated water to the anode chamber 10 of the electrolytic cell 1.
The cover plate 4 has an outlet for treated water in the anode chamber 10.
16 is provided, and the outlet 16 is connected to the cover plate 4
Is connected to the cathode-side inlet 17 provided at the second position. Further, the cover plate 4
Is provided with an outlet 19 for treated water in the cathode chamber 9, and the outlet
The discharge path 18 is connected to 19.

A treated water supply means 24 is connected to the treated water introduction port 14 introduced into the anode chamber 10. This treated water supply means 24 passes through the raw water introduction pipe 11, the valve 12, the fitting 20, and the pipe 13,
A line 24a for supplying raw water such as tap water to the anode chamber 10;
An additive liquid line 24b for adjusting the electric conductivity of the treated water by mixing an additive liquid such as an aCl solution from the pump injection device 21 into the raw water via the connection joint 20 through the connection joint 20.

In this treated water supply means 24, well water and tap water generally have unstable electric conductivities and differ from each other. Therefore, pumping is performed to increase electric conductivity of raw water and improve electrolytic efficiency. The inorganic liquid 23 is added by the device 21. In supplying the raw water, a pressurizing pump and the like are not shown, but the raw water may be supplied in a pressurized state in proportion to the electrolysis efficiency in the electrolytic cell 1, the electrolysis speed, and the like.
You can use a pump.

The treated water from the discharge channel 18 may be supplied to a water tank for food processing, a pool, a water storage tank, and for this embodiment, water in the water tank for food processing, a pool, a water storage tank is used as raw water,
Pressurized by the pump and the like, and the raw water introduction pipe 11
To the electrolytic cell 1, the water treated in the electrolytic cell 1 may be circulated through the discharge path 18 to the raw water, and the raw water disinfected by bacteria may be, for example, tap water, well water, The treated wastewater and the treated human wastewater may be discharged from the raw water introduction pipe 11 through the electrolytic tank 1 through the discharge passage 18 to the sewage in a pressurized state by a pump or the like.

Next, a method for producing sterile water of the present invention will be described.

First, after confirming whether or not the electric conductivity of the raw water is desired, if the electric conductivity is low, the inorganic liquid 22 is injected by the pump injection device 21 to supply the desired electric conductivity of the raw water and water is supplied. In addition, the raw water and the raw water with the increased electric conductivity are supplied to the electrolytic cell 1.
Is supplied to the anode chamber 10 through the anode-side inlet 14.

The water discharged from the anode chamber 10 passes through the circulation path 15 and is guided to the cathode chamber 9 through the cathode-side inlet 17 guided to the cathode chamber 9,
It is discharged from the cathode outlet 19. After the acidic water is filled from the anode side discharge port 16 of the electrolytic cell 1 through the circulation path 15 into the cathode chamber 9, a DC power supply of a predetermined voltage is applied to the anode electrode 3.
In addition, the power is applied to the electrode terminals 6 and 7 from the power supply 23 in order to apply the voltage to the cathode electrode 5. Then, when a predetermined flow rate and a predetermined applied voltage are applied, acidic water having a predetermined pH is generated on the anode chamber 10 side. Further, the acidic water supplied through the circulation path 15 is guided to the cathode side, and in the cathode chamber 9 side, alkaline water is generated by an electrochemical reaction, mixed and neutralized with the acidic water, and discharged as neutral water on the cathode side. It is discharged from the outlet 19 and becomes neutral sterile water.

The experimental example of the result when sterilized by the above method is
It is shown in the table.

In this experiment, the to-be-treated water sample used was a homogenized tofu and raw uddon that had been spoiled in tap water, and a sample mixed with purely cultured Escherichia coli as raw water and electrolyzed at a flow rate of 1000 ml / min. As an experimental example, the numbers of common bacteria and coliform bacteria are shown in Table 1 above.

Further, an experimental example was used to compare the effects of the method or apparatus for producing sterile water of the present invention, and the electrode characteristics of the present example were added. The result of minor reversal and sterilization is
It is shown in the table. The treated water sample as the condition is the same as the condition in Table 1, and represents the number of general bacteria and coliforms.

Examination of the data in the above example in detail based on an experimental example shows that in the experimental example, the raw water containing the coliform bacteria and general bacteria was sterilized at pH 3.70 or lower in the acidic water in the anode chamber subjected to electrolytic treatment. It is effective, and in order to further improve the bactericidal effect, it can be known that the cells are completely killed if the pH is 3.49 or less.

Furthermore, in order to compare the experimental example according to the present embodiment, as an experimental example, the coliform group to know the bactericidal effect by pH,
Table 3 shows the results of examining the pH of the electrolyzed acidic water and the sterilizing behavior thereof.

In Table 3, in the case of the electrolyzed acidic water, the coliforms were not completely killed unless the pH was 2.70 or less, whereas in Table 1 of the experimental example of this example, the pH was 3.49 or less. It is completely effective. From this point of view, it can be considered that acidic water in an electric field has a high oxidation reaction by electrochemical energy with respect to sterilization, and it is considered that a high sterilizing effect is produced even if the pH is high.

Furthermore, in order to compare the sterilizing effect with the experimental example, when comparing the experimental example of the sterilizing effect when the electrode characteristics of the experimental example were inverted and applied from Table 2, the sterilizing effect did not appear at all. Means that.

This means that the oxidation reaction did not completely occur for the bacteria because the alkaline water was simply neutralized on the anode side in the electrolytic electric field. Table 4 shows the electrolysis efficiency with respect to the change in the electric conductivity of the raw water.

From this table, it can be seen that, in order to obtain a predetermined pH, low electric conductivity requires high power consumption, and high electric conductivity requires low power consumption. In the case of obtaining sterile water, it is found that it is effective to increase the electric conductivity of raw water by adding an inorganic substance such as NaCl to increase the electrolysis efficiency.

That is, according to the experimental example of the present embodiment, when acidic water is introduced into the cathode chamber and electrolyzed, it is neutralized, and the sterilizing effect of the sterilized water is maintained.

[Effects of the Invention] According to the present invention, in order to eliminate the generation of unstable sterile water due to the electroconductivity of raw water and the electrical conductivity of raw water, the raw water is mixed with raw water by an inorganic addition device,
Electrolyzing, and using the electrolyzed water obtained by this, at room temperature, in a running water state, and with only the equipment related to a simple mechanism, sterilization of general running water and contamination by bacteria such as circulating water Water can be sterilized.

This is because, apart from conventional chemical agents, there was no technology to produce the bacteria-contaminated water under sterile conditions at normal temperature and in flowing water. In fields that require cleaning, such as water for food processing, pool water for swimming, water in water storage tanks for civil engineering installed inside and outside the building, and cooler water used for air conditioning coolers and cooler boxes, etc. When sterile or bacteriostatic water treatment is preferred, the sterile water can be easily provided.

[Brief description of the drawings]

The accompanying drawings are sectional views showing one embodiment of the present invention. In the figure, 1 is an electrolytic cell, 3 is an anode, 5 is a cathode, 9 is a cathode chamber,
10 is an anode chamber.

Claims (2)

(57) [Claims] In an electrolytic cell having an anode compartment and a cathode compartment formed by partitioning an anode and a cathode by a diaphragm, treated water is made to flow into the anode compartment to be acidified and sterilized, and then to the cathode compartment. A method for producing sterile water, wherein the sterilization water is neutralized. 2. An electrolytic cell having an anode cylinder on the peripheral surface, a cathode disposed in the center, and a diaphragm interposed therebetween, and treated water supply means for supplying treated water into the anode chamber of the electrolytic cell. ,
A circulation path for introducing the acidified treated water in the anode chamber into the cathode chamber, a drainage path for discharging the treated water in the cathode chamber, and a power supply for applying a DC voltage between the anode and the cathode. Sterile water production equipment.