WO2010035421A1 - Apparatus for water treatment - Google Patents

Abstract

An apparatus for water treatment (1) to which raw water to be treated (A1) is supplied and in which the raw water (A1) is subjected to given treatments in a treating pipe (92).  The water treatment apparatus (1) is equipped with: an ultraviolet irradiator (20) which is disposed on the treating pipe (92) and irradiates the raw water (A1) with ultraviolet; a magnetic device (40) which is disposed downstream in the treating pipe (92) from the ultraviolet irradiator (20) and applies a magnetic field to the raw water (A1) being flowing; and a radical-multiplying part (30) which is located between the ultraviolet irradiator (20) and the magnetic device (40) in the treating pipe (92) and multiplies at least one of a superoxide (·O₂ ^-), hydrogen ions (H₃O⁺), hydroxyl radicals (HO·), hydrogen peroxide (H₂O₂), singlet oxygen (¹O₂), a metal/oxygen complex (M-OO), and ozone (O₃).

Description

Water treatment equipment

The present invention relates to a water treatment apparatus, and more particularly to a water treatment apparatus capable of sterilizing various types of water in an extremely short time.

So far, many studies have been made on detoxification and sterilization of water. However, conventional sterilization uses high temperature, and cannot be sterilized without damaging food, or even if sterilized, it is insufficient.
The term “sterilization” has a very wide meaning depending on the user. In this specification, terms such as sterilization, disinfection, and sterilization are distinguished as follows. Also, when considering the prior art, attention must be paid to these distinctions.

“Sterilization” refers to the killing of all microorganisms present in the object. “Disinfection” refers to killing target microorganisms. “Sterilization” is conventionally used interchangeably with disinfection, but is an unclear term. It should be noted that when the term “sterilization” is used, unlike “sterilization”, not all microorganisms are killed. The above usage is in accordance with the New Infectious Disease Law and the Ordinance of the Ministry of Health and Welfare. In addition, the “microorganism” to be sterilized in the present invention mainly includes fungi, bacteria, viruses, and protozoa.

Generally, as a sterilization / disinfection method, a physical method, a chemical method, and a combination of these methods are known.
As a physical sterilization / disinfection method, there is a method using high temperature or high pressure. For example, there is a method of holding at a high pressure at 100 ° C. or higher for a predetermined time. At this time, the object to be sterilized is placed in an environment of steam, water or dry heat. A method of maintaining a temperature higher than room temperature in water has been widely used since ancient times because it is not harmful. However, it should be noted that the microorganisms that can be sterilized differ depending on the temperature and cannot be sterilized. As an application of the method using high temperature, there is an intermittent sterilization method. The intermittent sterilization method is intended to sterilize by removing the bacterial spore state, and after raising the temperature, lowering it allows germination and killing of highly durable spores even at high temperatures. It is what.

As a chemical disinfection method, there is a method using a so-called drug, and a drug suitable for the target microorganism is selected. Chemical sterilization methods generally cannot sterilize.

However, when high temperature or high pressure is used, it is not suitable for sterilizing food (killing microorganisms attached to food). This is because the cells in the food are deteriorated due to high temperature or high pressure. In addition, a method using a chemical drug is not suitable for sterilization of food in consideration of the residual of the drug. Therefore, a safe and complete sterilization method at normal temperature (less than 40 ° C.) without using high temperature and high pressure is required.

As a physical sterilization method that does not use high temperature and high pressure, sterilization by ultraviolet rays has been conventionally performed. However, sterilization with ultraviolet rays may not be effective unless the microorganisms are directly exposed to ultraviolet rays, and that alone is an extremely incomplete sterilization method.

On the other hand, many devices for activating water have been studied so far. As activation of water, a method of activating water by applying an electric field or a magnetic field to water is often employed. For example, in the waste liquid filtration activation device of Patent Literature 1 and the magnetic wave water adjustment device of Patent Literature 2, water is activated by applying a magnetic field to water. And it sterilizes by irradiating ultraviolet rays to water activated by magnetism.
However, as described above, sterilization by ultraviolet rays is extremely incomplete by itself, and is far from sterilization.

Patent Document 3 discloses a water supply apparatus for magnetic ionized water that is processed while circulating water discharged from a tank. In this apparatus, a magnetic field is applied after irradiating ultraviolet rays in the circulation path, and water can be completely sterilized. However, in Patent Document 3, sterilization is only performed by ultraviolet irradiation (see paragraph 0050). The magnetic magnet circuit is provided only for the purpose of generating magnetic ionized water. In this document, the term “complete sterilization” is used. However, even though complete sterilization is intended, sterilization intended in this specification, that is, killing highly durable microorganisms such as spore bacteria. There is no disclosure of data, and it is extremely suspicious whether it has been completely destroyed. In the past sterilization techniques, there are many literatures that recognize that sterilization can be performed by applying ultraviolet rays, and although sterilization is possible, sterilization is not performed. Even if sterilization is performed under certain conditions, spore germs have not been sterilized.

Moreover, in the apparatus of patent document 3, since the water which returned to the tank is supplied, there exists a problem that there exists a high possibility that the supplied water will mix the germs which remained in the tank.
Furthermore, in various conventional sterilizers (including high-pressure steam sterilizers and dry heat sterilizers) including technologies (such as autoclaves) other than the above-mentioned patent documents, the time required for sterilization is very important. It took at least 1-2 hours.

JP 2006-289317 A JP 2001-029957 A JP 2002-138526 A

The present invention was created based on the above background, and an object of the present invention is to provide a water treatment apparatus capable of sterilizing and sterilizing all microorganisms in a normal temperature region (0 to 40 ° C.) in a very short time. To do.

The water treatment apparatus of the present invention is a water treatment apparatus that is supplied with treatment target water and performs a predetermined treatment on the treatment target water in a treatment passage, and is provided on the treatment passage with ultraviolet rays applied to the treatment target water. An ultraviolet irradiation device that irradiates; a magnetic device that is provided downstream of the ultraviolet irradiation device in the treatment passage and applies a magnetic field to the water to be treated; and between the ultraviolet irradiation device and the magnetic device in the treatment passage. , Superoxide (.O ₂ ⁻ ), hydrogen ion (H ₃ O ⁺ ), hydroxyl radical (HO.), Hydrogen peroxide (H ₂ O ₂ ), singlet oxygen ( ¹ O ₂ ), metal-oxygen complex And a radical increasing means for increasing at least one of (M-OO) and ozone (O ₃ ).

According to such a water treatment apparatus, a certain percentage of microorganisms are killed by passing the water to be treated through the ultraviolet irradiation apparatus. Further, when the water to be treated passes through the ultraviolet irradiation device, radicals or chemical species that increase radicals, for example, superoxide (.O ₂ ⁻ ), hydrogen ions (H ₃ O ⁺ ), hydroxyl radicals (HO.) Hydrogen peroxide (H ₂ O ₂ ), singlet oxygen ( ¹ O ₂ ), and ozone (O ₃ ) are generated. When ordinary water is simply irradiated with ultraviolet rays, the amount of these radicals is very small. Therefore, in the present invention, the radicals between the ultraviolet irradiation device and the magnetic device in the treatment path are further increased by the radical increasing means. Alternatively, at least one chemical species that increases radicals is increased.

Then, in a state where the radicals are increased, the treatment target water is passed through the magnetic device and a magnetic field is applied to the treatment target water, so that the sterilization power due to the oxidizing power of the radicals is increased, and the microorganisms in the treatment target water are killed all at once. Perish. Due to the interaction between the radical and the magnetic field, strong sterilization is performed and at the same time, the oxidizing power of the radical is lost. Since radicals used in the present invention are mainly composed of constituent elements of water, radicals that have passed through the magnetic device become harmless water.
As described above, according to the water treatment apparatus of the present invention, it is possible to sterilize using a substance that returns to water without using chemicals, and to obtain harmless water that can be consumed.
And since the water that has passed through this magnetic device has a high detergency as it is generally said, it can be suitably used for washing foods, etc. It can be suitably used for germination, for example, cultivation of sprout.

In the above-described water treatment apparatus, the radical increasing means is a small unit that allows air or oxygen to enter from the upstream side of the ultraviolet irradiation apparatus in the processing passage or between the ultraviolet irradiation apparatus and the magnetic apparatus. It can be a hole or a gap. Further, the radical increasing means may be a gas supply device for supplying air or oxygen from the outside upstream of the ultraviolet irradiation device in the processing passage or between the ultraviolet irradiation device and the magnetic device. Further, the radical increasing means may use a hydrogen peroxide generator disposed upstream of the ultraviolet irradiation device in the processing path or between the ultraviolet irradiation device and the magnetic device.

In the water treatment apparatus described above, an ion having a case and a replaceable ion supply cartridge provided in the case and including a metal exposed on the surface, upstream of the magnetic device in the treatment passage. A quantity adjusting device can be provided.

Thus, by adjusting the amount of metal ions by the ion amount adjusting device, the sterilizing power of the magnetic device can be further increased, or the harm of the already mixed metal ions can be reduced.

In the above-described water treatment apparatus, the water to be treated can be provided from a tank, and a circulation passage connecting the treatment passage and the tank can be provided downstream of the magnetic device.

Thus, any microorganism can be sterilized within a few minutes by circulating the water to be treated in the water treatment apparatus of the present invention and sterilizing.

Further, it is desirable to provide a water discharge passage between the magnetic device and the tank in the circulation passage for taking out the sterilized and harmless treated water.

As described above, by providing a water discharge passage in the downstream portion of the magnetic device before returning to the tank, it is possible to obtain sterilized and harmless treated water without mixing microorganisms.

Since radicals are very unstable, the distance between the ultraviolet irradiation device and the magnetic device is shortened, and the water to be treated is passed through the magnetic device with a sufficient amount of radicals. The sterilizing power can be effectively exhibited.

According to the water treatment apparatus of the present invention, it is possible to sterilize all microorganisms in water in a very short time. And if the food etc. which want to disinfect are wash | cleaned with the water processed with this water treatment apparatus, the microorganisms adhering to the target object can be removed. Moreover, since the water treated by the water treatment apparatus of the present invention is harmless and sterile, it can be suitably used for drinking, experimental use, agricultural use and the like.

It is a whole block diagram of the water treatment apparatus of this invention. It is sectional drawing of an ultraviolet irradiation device. It is sectional drawing of a radical increase part. It is sectional drawing of a magnetic apparatus. It is a block diagram at the time of using a water treatment apparatus in two steps. It is a figure which shows the other form of a radical increase means. It is sectional drawing of the ion content regulator which has a radical increase means together. It is the block diagram (a) and top view (b) of a tank which have a water flow generation | occurrence | production mechanism. It is a table | surface which shows the test result of sterilization. It is a table | surface which shows the test result of sterilization. It is a table | surface which shows the test result of sterilization. It is a table | surface which shows the test result of sterilization. It is a whole block diagram of the test apparatus which performs sterilization by ultraviolet irradiation. It is the table | surface (a) which shows the test result of the sterilization by the water treatment apparatus of this invention, and the table | surface (b) which shows the test result of the sterilization by ultraviolet irradiation. It is a table | surface which shows the test result of the process by magnetism.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
As shown in FIG. 1, the water treatment apparatus 1 is supplied with the treatment target water A1 from the tank 10 in which the treatment target water A1 is stored, performs a predetermined treatment, and returns the treatment target water A1 to the tank 10. A device for sterilization. The water treatment apparatus 1 mainly includes a pump P, an ultraviolet irradiation device 20, a radical increasing unit 30 as an example of a radical increasing unit, and a magnetic device 40. In addition, in order to connect each apparatus of the water treatment apparatus 1, the piping 90 (91-94) which enables circulation of the process target water A1 is provided.

The tank 10 stores the target water A1. The tank 10 is not necessary in principle for the realization of the water treatment apparatus 1 of the present invention, but it is desirable to provide the tank 10 when the treatment target water A1 is treated in a large amount. The material of the tank 10 is preferably stainless steel such as SUS316 (JIS).

The treatment target water A1 that can be treated by the water treatment apparatus 1 of the present invention is not particularly limited as long as it is pure water or other substances dissolved or mixed in water. Specific examples of the target water A1 include groundwater, spring water, hot springs, mineral springs, tap water, rainwater, seawater, deep water, waste water from factories, households, agricultural products, marine products, water containing chemicals, Examples include water storage tanks, ballast water, cultivation water, aquaculture water, pool circulation water, medical sterilization water, bathtub water, precision equipment washing water, and semiconductor washing water.

The pipe 90 includes an introduction pipe 91 that introduces raw water (the water to be treated A1 and water that has not been treated by the water treatment apparatus 1) into the tank 10, and the ultraviolet irradiation apparatus 20 Connected to the introduction pipe 91 in order to return the treatment target water A1 of the treatment pipe 92 downstream of the magnetic apparatus 40 to the tank 10 and the treatment pipe 92 constituting the treatment passage that passes through the radical increasing part 30 and the magnetic apparatus 40 in this order. A circulation pipe 93 that constitutes the circulation path and a water discharge pipe 94 that discharges the water to be treated A1 (treated water) that has flowed out of the magnetic device 40. The water discharge pipe 94 constitutes a water discharge passage.

The pump P is provided downstream of the tank 10 on the processing pipe 92 so as to suck the processing target water A1 in the tank 10 and pump it toward the ultraviolet irradiation device 20. The arrangement of the pump P is not limited to the form shown in FIG. 1 and may be provided at any position on the processing pipe 92 and the circulation pipe 93. A plurality of pumps P may be provided according to the necessary pumping pressure. In addition, the pumping direction of the processing target water A1 by the pump P needs to allow the processing target water A1 to pass through the ultraviolet irradiation device 20 and the magnetic device 40 in this order as described above.

The ultraviolet irradiation device 20 is for irradiating the treatment target water A1 with ultraviolet rays through which the treatment target water A1 passes. As the ultraviolet irradiation device 20, a known so-called ultraviolet sterilization device can be used. For example, as shown in FIG. 2, the ultraviolet irradiation device 20 includes a quartz tube 24 in a cylindrical case 23 having an introduction port 21 into which the water to be treated A1 flows in and an outlet port 22 through which it flows out. The tube 24 has an ultraviolet lamp 25. As the ultraviolet lamp 25, one having a peak wavelength of 254 nm or 185 nm can be used. One or both of these may be selected according to the microorganism to be sterilized.

Here, it should be noted that the ultraviolet irradiation device 20 can sterilize microorganisms by irradiation with ultraviolet rays per se, but cannot sterilize them. When the treatment target water A1 is irradiated with ultraviolet rays by the ultraviolet irradiation device 20, the above-described sterilization is performed, and various highly reactive radicals or chemical species that increase radicals are generated from the water. These radicals include superoxide (.O ₂ ⁻ ), hydrogen ions (H ₃ O ⁺ ), ozone (O ₃ ), hydroxyl radicals (HO.), And hydrogen peroxide (H ₂ O) as active oxygen. ₂ ), singlet oxygen ( ¹ O ₂ ), and the like. Further, when chlorine is contained in water, ClO ^- is also generated.

In the present embodiment, as shown in FIG. 3, the radical increasing portion 30 may be an apparatus in which a female screw hole 32 is formed in a stainless steel pipe 31 and a male screw 33 is screwed into the female screw hole 32. The male screw 33 is screwed into the female screw hole 32 through a slight gap. Therefore, when the water to be treated A1 flows into the passage 34 in the stainless steel pipe 31, air slightly enters the passage 34 from the gap between the female screw hole 32 and the male screw 33 due to the negative pressure generated according to the flow velocity of the water to be treated A1. To do. The air that has entered the passage 34 is agitated by the flow of the water A1 to be treated, becomes nanobubbles or microbubbles (hereinafter simply referred to as “nanobubbles”), and is hydrogen peroxide (H ₂ O derived from water and oxygen). ₂ ) including radicals or chemical species that increase radicals are generated. Other chemical species include superoxide (.O ₂ ⁻ ), hydrogen ion (H ₃ O ⁺ ), hydroxyl radical (HO.), Singlet oxygen ( ¹ O ₂ ), metal-oxygen complex (M -OO) and ozone (O ₃ ).

When using the water treatment apparatus 1, the generation of the nanobubbles 35 may be adjusted by adjusting the screwing amount of the male screw 33 so that these chemical species are sufficiently generated. Moreover, it is better to set the flow rate of the water to be treated A1 in the stainless steel pipe 31 sufficiently high.

As the stainless steel pipe 31 used for the radical increasing part 30, it is desirable to use SUS316 in JIS (Japanese Industrial Standard), for example. A small amount of iron (Fe) contained in the stainless steel tube 31 of the radical increasing part 30 is dissolved in the treatment target water A1 as metal ions, whereby the sterilizing power in the magnetic device 40 is enhanced.

As shown in FIG. 4, the magnetic device 40 is provided with a plurality of magnets 42 arranged outside the pipe 41 through which the water to be treated A1 flows. The magnet 42 is disposed so that the water to be treated A1 flowing through the pipe 41 crosses the magnetic field lines. But the arrangement | positioning of the magnet 42 is not restricted to what was shown in FIG. 4, If the water flow of the process target water A1 can cross a magnetic force line, other arrangement | positioning may be sufficient.
The magnet 42 is desirably as strong as possible, and a neodymium magnet can be suitably used. The magnet 42 preferably has a magnetic flux density of 0.9 T (9000 Gauss) or more, more preferably 1.2 T (12000 Gauss) or more, and further preferably 1.4 T (14000 Gauss) or more.
If the magnetic flux density of the magnet 42 is less than 0.9 T, sterilization in the magnetic device 40 will be insufficient. The larger the magnetic flux density of the magnet 42, the higher the sterilizing power in the magnetic device 40.

In each of the above-described ultraviolet irradiation device 20, radical increasing unit 30, and magnetic device 40, it is desirable that the flow rate of the water to be treated A1 is 2 m / s or more. This is for generating sufficient radicals and increasing the sterilizing power of the magnetic device 40. Further, in order to reach the magnetic device 40 with radicals having an oxidizing power, the length (path) of the flow path between the radical increasing portion 30 and the magnetic device 40 is preferably 20 cm or less, and 10 cm or less. Is more desirable. In addition, when the piping part between the ultraviolet irradiation apparatus 20 and the magnetic apparatus 40 forms the radical increase part 30, the length of the flow path between the ultraviolet irradiation apparatus 20 and the magnetic apparatus 40 is 20 cm or less. It is more desirable that it is 10 cm or less.

The activated carbon filter 50 is provided on the water discharge pipe 94 on the downstream side of the portion where the treatment pipe 92 branches off from the circulation pipe 93. The activated carbon filter 50 is a conventionally known filter filled with activated carbon, and can be arbitrarily provided. Further, such a physical filter may be arranged at a position different from the above. For example, as shown in FIG. 1, a filter 61 may be provided on the circulation pipe 93, or a filter 62 may be provided on the introduction pipe 91 immediately after the raw water is taken in.

The water treatment apparatus 1 configured as described above operates as follows. The raw water introduced from the introduction pipe 91 first enters the tank 10. Then, the water to be treated A1 is sucked from the tank 10 by the pump P and enters the treatment pipe 92.

The treatment target water A1 is sterilized by entering the ultraviolet irradiation device 20. At this time, not all microorganisms are killed, and microorganisms hidden behind suspended solids and highly resistant microorganisms such as spores remain. And a radical generate | occur | produces from water because an ultraviolet-ray hits process target water A1. For example, as described above, superoxide (.O ₂ ⁻ ), hydrogen ion (H ₃ O ⁺ ), hydroxyl radical (HO.), Hydrogen peroxide (H ₂ O ₂ ), singlet oxygen ( ¹ O ₂ ) In the case of tap water or the like, ClO ^- is also generated.

The treatment target water A1 that has passed through the ultraviolet irradiation device 20 then enters the radical increasing unit 30. In the radical increasing part 30, air enters through a gap between the female screw hole 32 and the male screw 33 provided in the side part in the stainless steel pipe 31, and becomes nanobubbles 35 in the processing target water A 1 that flows at high speed. Thereby, chemical species such as hydrogen peroxide that increases radicals or radicals in the treatment target water A1 increase. Further, iron slightly dissolves from the stainless steel pipe 31 into the treatment target water A1.

The treatment target water A1 having increased radicals enters the magnetic device 40 and passes across the magnetic field lines at high speed. At this time, the sterilizing power of radicals increases, and radicals are converted from an oxidized form to a reduced form. That is, it returns to harmless beneficial water. By increasing the sterilizing power of radicals, some microorganisms that could not be killed by the ultraviolet irradiation device 20 and highly resistant spore bacteria are also killed.

Thus, the microorganisms including the spore bacteria can be sterilized by passing the treatment target water A1 through the water treatment apparatus 1 once. The sterilized target water A1 can be appropriately taken out from the outlet pipe 94 and used for experimental water, drinking water, domestic water and the like. Since the outlet pipe 94 is not connected to the tank 10 but is connected between the magnetic device 40 and the tank 10, sterilization integrity and water harmlessness can be further ensured.

The treatment target water A1 that has passed through a strong magnetic field at a high speed in the magnetic device 40 has a very high osmotic power and a detergency, as is well known. can do. Therefore, the treatment target water A1 that has come out of the magnetic device 40 may be returned into the tank 10 through the circulation pipe 93. Thereby, microorganisms adhering to the inner wall of the tank 10 or suspended matter (microorganism remaining in the tank 10) can be peeled off and suspended in water. The peeled microorganisms are introduced into the processing pipe 92 and completely killed by passing through the ultraviolet irradiation device 20, the radical increasing unit 30, and the magnetic device 40.

As described above, according to the water treatment device 1 of the present embodiment, by passing through the magnetic device 40 in a state in which radicals are increased, particularly by the ultraviolet irradiation device 20, the radical increasing unit 30, and the magnetic device 40, Microorganisms that cannot be killed by normal sterilization methods such as spore bacteria can also be killed. Furthermore, the water to be treated A1 in the tank 10 can be sterilized within a few minutes by returning the water whose cleaning power has been increased by the magnetic treatment to the tank 10 and performing the treatment again.

What is necessary is just to wash | clean in the tank 10, when disinfecting food etc. using the water treatment apparatus 1 of this embodiment. Thereby, combined with the detergency of magnetically treated water, microorganisms attached to the surface of the food can be sterilized.
In the case of efficiently sterilizing food and the like, as shown in FIG. 5, the water treatment apparatus 1 of this embodiment is connected in two stages in series, and the food and the like may be washed in the tank 110 at the subsequent stage. Thus, by using two stages, the cleaning water A2 sterilized by the first-stage apparatus can be cleaned using a large amount of cleaning water, so that the efficiency of cleaning and sterilization can be increased.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified and implemented.
FIG. 6 is a diagram showing another form of the radical increasing means. Since the radical increasing means only needs to generate chemical species mainly composed of hydrogen peroxide, the method is not limited to the above-described method using nanobubbles, and a so-called method for generating hydrogen peroxide may be used. For example, the hydrogen peroxide generator 130 shown in FIG. 6 is an example of radical increasing means, and the electrolytic cell 131 is divided into two chambers, that is, an anode chamber 133 and a cathode chamber 134 by a diaphragm 132. An anode 135 is provided in the anode chamber 133, and a cathode 136 is provided in the cathode chamber 134. The cathode 136 is a porous member, and air or oxygen can be introduced into the cathode chamber 134 by permeation. A voltage is applied between the anode 135 and the cathode 136.

By passing the treatment target water A1 through the electrolytic cell 131 divided into the two anode chambers 133 and the cathode chamber 134, hydrogen peroxide is generated by the reaction of 1 / 2O ₂ + H ₂ O → H ₂ O _2. .

Such a hydrogen peroxide generator 130 may be provided anywhere as long as it is upstream of the magnetic device 40 on the processing pipe 92.

Moreover, you may use an ultraviolet irradiation device as a radical increase means (in the structure shown in FIG. 1, you may provide an ultraviolet irradiation device instead of the radical increase part 30). Further, the ultraviolet irradiation device (the ultraviolet irradiation device 20 in the configuration shown in FIG. 1) may also serve as the radical increasing means. As described above, when the water to be treated A1 is irradiated with ultraviolet rays, superoxide (.O ₂ ⁻ ), hydrogen ions (H ₃ O ⁺ ), hydroxyl radicals (HO.), Hydrogen peroxide (H Radicals such as ₂ O ₂ ) and singlet oxygen ( ¹ O ₂ ) are generated. Therefore, if these chemical species are sufficiently generated in the ultraviolet irradiation apparatus, the ultraviolet irradiation apparatus can be used as the radical increasing means (or the ultraviolet irradiation apparatus can also serve as the radical increasing means).

Further, an ion amount adjuster that adjusts the amount of metal ions in the treatment target water A1 may be provided in combination with or separately from the radical increasing means. FIG. 7 is a cross-sectional view of an ion amount regulator having both radical increasing means. As shown in FIG. 7, the ion amount adjuster 230 is formed by mounting a cartridge 239 having a metal layer on at least the surface in a cylindrical column 231. Both the one end 239a and the other end 239b of the cartridge 239 are formed in a tapered shape so that the flow of the treatment target water A1 flowing from the one end 239a toward the other end 239b becomes smooth. One end and the other end of the column 231 are provided with lids 232 and 233 having shapes along the one end 239a and the other end 239b of the cartridge, respectively. The pipe 232a extends through the inlet-side cover 232 into which the water to be treated A1 flows, and the female screw hole 234 and the male screw 235 are provided on the side of the pipe 232a in the same manner as the radical increasing part 30 described above. Then, like the radical increasing part 30, air enters the pipe 232 a from the gap between the male screw 235 and the female screw hole 234, and nanobubbles are generated in the ion amount adjuster 230.

According to such an ion amount adjuster 230, nanobubbles are generated and function as radical increasing means, and metal ions are supplied to enhance the sterilizing power in the magnetic device 40. Depending on the selection, harmful heavy metals already dissolved in the water to be treated A1 can be rendered harmless.

Since the cartridge 239 of the ion amount adjuster 230 is dissolved and decreases, it is preferable that it can be easily replaced. Examples of the metal material that can be used for the surface of the cartridge 239 include Fe, Co, Ag, Pb, Ni, Al, Mg, Zn, Cu, and Ti. The cartridge 239 preferably contains at least one of these metals. More specifically, as the cartridge 239, for example, a metal cartridge in which Ti is mixed with austenitic stainless steel, a metal cartridge in which Zn is mixed in austenitic stainless steel, a metal cartridge in which Cu is mixed in austenitic stainless steel, or the like. Can be mentioned.

Further, in combination with or separately from such an ion amount adjuster 230, at least the inner peripheral surface of the pipe 90 of the water treatment apparatus 1 (particularly upstream of the magnetic apparatus 40 of the treatment pipe 92) contains the metal as described above. Materials may be used. For example, the processing pipe 92 can be made of stainless steel such as SUS316 (JIS) or copper. Thereby, since metal ion can be supplied to process target water A1, sterilization power can be strengthened or heavy metals etc. can be made harmless.

In the above embodiment, in the radical increasing portion 30, air is intruded through the gap, but oxygen may be intruded. A small hole may be provided instead of the gap between the members. Further, air or oxygen may be forcibly injected and supplied into the processing pipe 92 from a pump or a cylinder (gas supply device). Further, the position where air or oxygen is introduced into the processing pipe 92 may be anywhere between the tank 10 and the magnetic apparatus 40 or in the circulation pipe 93 as long as it is in front of the magnetic apparatus 40. That is, any place other than the path through which the treated water flows from the magnetic device 40 through the water discharge pipe 94 may be used. However, it is desirable that the processing target water A1 entering the magnetic device 40 has a position and configuration that include sufficient radicals.

In the configuration in which the water to be treated A1 stored in the tank 10 is supplied to the water treatment apparatus 1 as in the above embodiment, microorganisms in the water to be treated A1 adhere to the inner wall of the tank 10 and remain in the tank 10. In order to avoid this, it is desirable to generate a water flow for separating microorganisms attached to the inner wall.

For example, as shown in FIGS. 8A and 8B, a straight tubular stainless steel pipe 91a is provided at the downstream end of the introduction pipe 91, and this stainless steel pipe 91a is directed toward the inner wall 10a of the tank 10 to be treated water A1. So as to be discharged along the inner peripheral surface of the tank 10. Thereby, the water flow along the inner peripheral surface of the tank 10 can be generated by discharging the processing target water A1 from the stainless steel pipe 91a. Further, a straight tubular stainless steel pipe 92a is provided at the upstream end of the processing pipe 92, and the stainless steel pipe 92a is disposed along the inner peripheral surface of the tank 10, so that the inside of the tank 10 can be obtained without countering the water flow. The treatment target water A1 can be sucked and sent out to the treatment pipe 92 (water treatment apparatus 1).

The stainless steel pipe 91a is disposed so as to discharge the treatment target water A1 obliquely downward, and the end portion (suction port) of the stainless steel tube 92a is disposed below the end portion (discharge port) of the stainless steel tube 91a. Thus, a spiral water flow can be generated in the tank 10, and the treatment target water A <b> 1 can be sucked from the stainless steel pipe 92 a along the spiral water flow. Thereby, since the microorganisms peeled off from the inner wall 10a by the water flow can be sucked from the stainless steel pipe 92a along the water flow, the treatment target water A1 in the tank 10 can be uniformly sent to the water treatment device 1 and sterilized. .

Next, examples in which the sterilization effect of the water treatment apparatus of the present invention has been confirmed will be described. In addition, the water treatment apparatus used in the following tests has substantially the same configuration as the above-described embodiment (see FIG. 1) (members corresponding to the filters 61 and 62 are not provided).

<Sterilization test 1 with water treatment equipment>
Using the water treatment apparatus of the present invention, sterilization tests were conducted on 57 types of microorganisms listed in the names of the bacteria in FIGS. In addition, the bacteria name shown in the figure (in the table) is an official name in Latin notation, and katakana notation is displayed for reference.

[Test method]
The specifications of the water treatment device are as follows.
Tank volume 30 l
Flow velocity in treatment pipe 2.5m / s
Pipe material SUS316 of the radical increase part
Magnetic device magnetic flux density 1.37T

Water in the tank was treated by storing 30 l of tap water or pure water in the tank and operating the water treatment device for a predetermined time. In this test, the water discharged from the magnetic device is returned to the tank through the circulation pipe and introduced into the treatment pipe again. That is, in this test, treatment is performed while circulating water.

Thereafter, the bacteria were placed in the tank so that there would be 10,000 per ml. At this time, 1 ml of water in the tank before the treatment was mixed-cultured at 36 ° C., and the number of colonies was counted as “control” in FIGS.

Thereafter, the water treatment apparatus was operated, and at 1 minute, 2 minutes, and 3 minutes after the start of treatment, the sample water was taken out from the tank, dropped into the culture medium to culture the bacteria, and the number of colonies was counted. These tests were performed for each bacterium. The water in the tank was not particularly heated, and the test was performed at room temperature (20 ° C.).

[Test results]
As shown in FIGS. 9 to 11, of 57 types of bacteria, 10 types of bacteria are sterilized by treatment for 1 minute, 50 types of bacteria are sterilized after 2 minutes, and when 3 minutes have passed. All 57 species were sterilized. As described above, conventionally, the sterilization treatment that has taken 10 or more minutes even at high temperatures can be performed within 3 minutes at room temperature (40 ° C. or less).

In particular, most resistant are spores are strong (spore 99%), _No. Since 38 is sterilized at an even within 3 minutes Bacillus subtilis, and 3 minutes for all the bacteria can know now It is estimated that sterilization is possible.

<Sterilization test 2 with water treatment equipment>
The sterilization test of 13 types of microorganisms listed in the name of the bacteria in FIG. In addition, this test was not the method of taking out the sample from the tank by performing the water circulation treatment, but the method of collecting the water once passed through the water treatment apparatus from the outlet pipe to make the sample.

[Test method]
The specifications of the water treatment device are as follows.
Tank material SUS316
Tank volume 30 l
Flow velocity in treatment piping 3.1m / s
Pipe material SUS316 of the radical increase part
Magnetic device magnetic flux density 1.37T

30 l of pure water was placed in the tank. Next, the strain was diluted to about 10 ⁶ cells / ml and added to the water in the tank. At this time, 1 ml of water in the tank was collected and cultured in pour at 30 ° C. for 3 to 7 days, and the number of colonies was counted as “control” in FIG.

Thereafter, the water treatment apparatus was operated (room temperature 24 ° C., water temperature 21 ° C., pH 6.5). Then, about 1 second after the start of the operation, 1 ml of water that once passed through the apparatus exiting from the water discharge pipe was collected, and mixed culture was performed at 30 ° C. for 3 to 7 days to count the number of colonies. Such a test was carried out individually for 13 types of microorganisms shown in FIG. 12, and was carried out 10 times for each microorganism.

[Test results]
As shown in FIG. 12, the spore bacteria No. 1 can be obtained by passing the water treatment device of the present invention once. All 13 fungi, including 8 Bacillus subtilis, were sterilized. Thus, according to the water treatment apparatus of the present invention, microorganisms can be sterilized in a very short time.

<Comparison test with sterilization by UV irradiation>
A test was conducted comparing sterilization (sterilization) using the water treatment apparatus of the present invention and sterilization using ultraviolet irradiation.

[Test method]
The specifications of the water treatment device are as follows.
Tank volume 30 l
Flow velocity in treatment pipe 2.5m / s
Pipe material SUS316 of the radical increase part
Magnetic device magnetic flux density 1.37T

As shown in FIG. 13, a test apparatus that performs sterilization by ultraviolet irradiation includes a tank 10 in which the processing target water A1 is stored, a processing pipe 192 in which the processing target water A1 from the tank 10 flows, a pump P, and ultraviolet irradiation. A device 120 (two ultraviolet lamps (peak wavelengths: 254 nm, 185 nm)) and a water discharge pipe 194 for discharging the water to be treated A1 discharged from the ultraviolet irradiation device 120 are provided.

The specifications of the test equipment are as follows.
Tank volume 30 l
Flow velocity in processing piping 3.0m / s
Total length of piping (including pump and UV irradiation device) 3m

30 l of pure water was put in the tank, and a bacterial solution (about 10 ⁶ cells / ml) whose number of bacteria was adjusted in advance was put in the tank. At this time, 1 ml of water in the tank before the treatment was collected, mixed culture was performed at 35 ° C., and the number of colonies was counted as “control” in FIGS. 14 (a) and 14 (b).

After collecting water in the tank, the ultraviolet lamp of the ultraviolet irradiation device was turned on, and the pump was started 3 minutes later. Then, after discarding the first 10 l of water discharged from the water discharge pipe, the water discharged from the water discharge pipe was collected, 1 ml was mixed and cultured at 35 ° C., and the number of colonies was counted. Such a test was performed individually for the five types of microorganisms shown in FIG. 14, and was performed five times for each microorganism. The test was performed at room temperature (25 ° C.).

[Test results]
As shown in FIG. 14 (a), when treated with the water treatment apparatus of the present invention, all five types of bacteria were sterilized. On the other hand, as shown in FIG. 14 (b), when treated only with ultraviolet irradiation, Bacillus subtilis that formed spores could not be completely sterilized (fifth time). The ultraviolet irradiation device 120 has two powerful ultraviolet lamps and is devised so that the ultraviolet rays easily hit the microorganisms. Therefore, most of the bacteria can be sterilized only by the ultraviolet irradiation. If it is a general ultraviolet irradiation device, it is presumed that the sterilizing power is further reduced, and it is presumed that the sterilization cannot be performed with a high probability when the amount of treatment is large.

<Magnetic treatment test>
About five types of microorganisms shown in FIG. 15, it was tested whether it was possible to sterilize only by magnetism.
[Test method]
In this test, the ultraviolet light irradiation device and the radical increase part were removed from the water treatment device of the present invention, and the test device in which the flow path between the tank and the magnetic device was formed with a stainless steel tube was used to treat only with the magnetic device. Water treatment was performed. The magnetic flux density of the magnet of the magnetic device is 1.37T. The test was performed individually for the five types of microorganisms shown in FIG.

(Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus subtilis)
25 l of pure water (23 ° C.) was placed in the tank, and about 3 × 10 ⁸ cells / ml of bacterial solution was prepared in 2 ml of 0.45% sterile saline. The bacterial solution (250 μl) was placed in the tank and stirred well to make about 3 × 10 ³ cells / ml. Then, 100 μl of water to be treated was collected from the tank in a sterilized petri dish and mixed-cultured on a standard agar medium to measure the number of “untreated” bacteria. Next, the test apparatus is operated at a flow rate of 3.0 m / s, and 100 μl of water to be treated is collected from the tank every 10 minutes until 60 minutes later in a sterile petri dish, mixed culture on a standard agar medium, and the number of bacteria is counted. It was measured. The culture was performed at 35 ° C. and observed for up to 48 hours.

(Escherichia coli)
25 l of pure water (23 ° C.) was placed in the tank, and about 1.5 × 10 ⁸ cells / ml of bacterial solution was prepared in 2 ml of 0.45% sterile saline. Into the tank, 2.5 ml of the bacterial solution was placed and stirred well to obtain about 1.5 × 10 ⁴ cells / ml. Then, 100 μl of water to be treated was collected from the tank in a sterilized petri dish and mixed-cultured on a standard agar medium to measure the number of “untreated” bacteria. Next, the test apparatus is operated at a flow rate of 3.0 m / s, and 100 μl of water to be treated is collected from the tank every 10 minutes until 60 minutes later in a sterile petri dish, mixed culture on a standard agar medium, and the number of bacteria is counted. It was measured. The culture was performed at 35 ° C. and observed for up to 48 hours.

(Legionella pneumophila)
25 l of pure water (23 ° C.) was placed in the tank, and about 3 × 10 ⁸ cells / ml of bacterial solution was prepared in 2 ml of 0.45% sterile saline. The bacterial solution (250 μl) was placed in the tank and stirred well to make about 3 × 10 ³ cells / ml. Then, 100 μl of water to be treated was collected from the tank in a sterile petri dish and inoculated into the GVPC basal medium, and the number of “untreated” bacteria was measured. Next, the test apparatus was operated at a flow rate of 3.0 m / s, and 100 μl of water to be treated was collected from the tank every 10 minutes until 60 minutes later in a sterile petri dish and inoculated into a GVPC basal medium, and the number of bacteria was measured. . The culture was performed at 37 ° C. and observed up to 5 days.

[Test results]
As shown in FIG. 15, even when only magnetism was applied, it was confirmed that the number of bacteria decreased as the treatment time increased, but even when treated for 60 minutes, it was far from sterilization. Therefore, it was confirmed that it was not possible to sterilize in a short time using only magnetism.

<Residue concentration measurement test>
The density | concentration of the residue (residual chlorine (ClO < ^- >)) contained in the water processed with the water treatment apparatus of this invention was measured.

[Test method]
The specifications of the water treatment device are as follows.
Tank volume 30 l
Flow velocity in treatment pipe 2.5m / s
Pipe material SUS316 of the radical increase part
Magnetic device magnetic flux density 1.37T

30 l of tap water (22 ° C.) was stored in the tank, and the water in the tank was treated by operating the water treatment device for a predetermined time. Thereafter, at 1 minute, 2 minutes, and 3 minutes after the start of the treatment, water of the sample was taken out from the tank, and DPD (diethylparaphenylenediamine) reagent was added. The color development at that time was compared with the standard color chart to determine the residual chlorine (free residual salt) concentration (so-called DPD method). In addition, the residual chlorine concentration of the tap water put in the tank was 1.0 ppm.

[Test results]
The residual chlorine concentration was 0.6 ppm after 1 minute treatment, 0.2 ppm after 2 minutes treatment, and 0 ppm after 3 minutes treatment. That is, the residual chlorine concentration decreased as the treatment time passed, and the residual chlorine was not completely detected after 3 minutes. As described above, according to the water treatment apparatus of the present invention, not only microorganisms can be sterilized in a short time, but also residues (residual chlorine) contained in the water to be treated can be decomposed in a short time.

Claims (10)

A water treatment apparatus that is supplied with water to be treated and performs a predetermined treatment on the water to be treated in a treatment passage,
An ultraviolet irradiation device that is provided on the treatment path and irradiates the treatment target water with ultraviolet rays;
A magnetic device that is provided downstream of the ultraviolet irradiation device in the treatment passage and applies a magnetic field to the water to be treated;
Superoxide (.O ₂ ⁻ ), hydrogen ions (H ₃ O ⁺ ), hydroxyl radicals (HO.), Hydrogen peroxide (H ₂ O ₂ ) between the ultraviolet irradiation device and the magnetic device in the treatment path. ), Radical increasing means for increasing at least one of singlet oxygen ( ¹ O ₂ ), metal-oxygen complex (M-OO), and ozone (O ₃ ). The radical increasing means is a small hole or gap in which air or oxygen is allowed to enter from the outside in the processing passage upstream of the ultraviolet irradiation device or between the ultraviolet irradiation device and the magnetic device. The water treatment device according to claim 1, characterized in that it is characterized in that: An ion amount adjusting device having a case and a replaceable ion supply cartridge provided in the case and including a metal exposed on the surface is provided upstream of the magnetic device in the processing path. The water treatment apparatus according to claim 1 or 2, characterized by the above-mentioned. The radical increasing means is a gas supply device for supplying air or oxygen from the outside in the processing path upstream of the ultraviolet irradiation device or between the ultraviolet irradiation device and the magnetic device. The water treatment apparatus according to claim 1 of the range. The radical increasing means is a hydrogen peroxide generator disposed on the upstream side of the ultraviolet irradiation device in the processing passage or between the ultraviolet irradiation device and the magnetic device. The water treatment apparatus according to item. The water treatment device according to claim 1, further comprising a circulation passage that is supplied from a tank and that connects the treatment passage and the tank downstream of the magnetic device. The water treatment device according to claim 6, wherein a water discharge passage is provided between the magnetic device and the tank in the circulation passage to take out sterilized and harmless treated water. A water treatment apparatus that is supplied with water to be treated and performs a predetermined treatment on the water to be treated in a treatment passage,
An ultraviolet irradiation device that is provided on the treatment path and irradiates the treatment target water with ultraviolet rays;
A magnetic device that is provided downstream of the ultraviolet irradiation device in the treatment passage and applies a magnetic field to the water to be treated;
Water provided at the upstream side of the ultraviolet irradiation device in the processing passage or between the ultraviolet irradiation device and the magnetic device, and having a small hole or a gap through which air or oxygen can enter from the outside Processing equipment. A water treatment apparatus that is supplied with water to be treated and performs a predetermined treatment on the water to be treated in a treatment passage,
An ultraviolet irradiation device that is provided on the treatment path and irradiates the treatment target water with ultraviolet rays;
A magnetic device that is provided downstream of the ultraviolet irradiation device in the treatment passage and applies a magnetic field to the water to be treated;
A water treatment apparatus comprising a gas supply unit that supplies air or oxygen from the outside, provided on the upstream side of the ultraviolet irradiation apparatus in the processing passage or between the ultraviolet irradiation apparatus and the magnetic apparatus. . A water treatment apparatus that is supplied with water to be treated and performs a predetermined treatment on the water to be treated in a treatment passage,
An ultraviolet irradiation device that is provided on the treatment path and irradiates the treatment target water with ultraviolet rays;
A magnetic device that is provided downstream of the ultraviolet irradiation device in the treatment passage and applies a magnetic field to the water to be treated;
A water treatment apparatus comprising: a hydrogen peroxide generator disposed upstream of the ultraviolet irradiation apparatus in the processing passage or between the ultraviolet irradiation apparatus and the magnetic apparatus.

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