JP2008264739A - Filtering and sterilizing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly, surely and simultaneously execute filtering treatment and sterilizing treatment to a large amount of liquid. <P>SOLUTION: Inside an outer shell 30, a cylindrical metal filter 10 is disposed. An ultrasonic vibrator 20 is fixed to the closing plate 11 of the metal filter 10, and the ultrasonic vibrator 20 ultrasonically vibrates by the supply of an oscillation current from an ultrasonic oscillator 21. When a treatment liquid is supplied into the outer shell 30, the treatment liquid is filtered by permeating the metal filter 10 from the outer peripheral side to the inner peripheral side. Since the metal filter 10 is ultrasonically vibrated by the ultrasonic vibrator 20, the treatment liquid permeating the mesh part of the metal filter 10 is surely irradiated with ultrasonic waves. Thus, microorganisms included in the treatment liquid permeating the mesh part receive shock waves when cavitation bubbles generated by ultrasonic wave irradiation break up, are destroyed and become extinct. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a filtration / sterilization apparatus, and is devised so that liquid filtration and sterilization can be performed at the same time and mass processing can be performed.

In public baths, hot springs, swimming pools, cooling towers, etc., water is circulated and reused, and in hydroponics, aqueous solutions containing nutrients are circulated and reused.
A large amount of wastewater comes from livestock sheds such as pig houses and food processing factories.

  The water used in these various fields may be contaminated with dust (dust, contaminants, dirt, earth and sand) and microorganisms (E. coli, Legionella, Cryptosporidium, etc.). It is necessary to remove dust and the like and sterilize microorganisms before reuse or discharge to the outside.

  Conventionally, “filtration” and “microbe sterilization” are separate processing steps. For example, after filtration, sterilization is performed, and then reuse and discharge are performed.

  As a filtration method, a method of performing filtration using an activated carbon tower, various filters, a precipitation tank, or the like is known.

In addition, the following are known as methods for sterilizing microorganisms.
(1) Disinfect with chlorine.
(2) Sterilize with ozone.
(3) Sterilize by irradiating with ultraviolet rays.
(4) Sterilize by irradiating with ultrasonic waves. In other words, the water (liquid) to be sterilized is flowed in a thin film of several millimeters on the processing plate, and ultrasonic waves are transmitted from the ultrasonic transducer to the processing plate to vibrate, thereby superfluous to the film-like water. Irradiate sound waves. Then, fine bubbles called cavitation bubbles are generated in the water, and the microorganisms are destroyed and sterilized by shock waves generated when the bubbles are crushed (see Non-Patent Document 1). In this case, the water can be sterilized efficiently and reliably by forming a film.

Hitachi News Release December 13, 2001 "Development of ultrasonic sterilization technology that does not use environmentally friendly chemicals" Published by Hitachi, Ltd. Journal of Biotechnology Biomedia 2006 No.1 Page 17

By the way, the sterilization method has the following problems.
(1) In sterilization with chlorine, chlorine may combine with organic substances to generate carcinogenic trihalomethanes. Cryptosporidium is extremely chemical resistant and cannot be sterilized with chlorine.
(2) In sterilization with ozone, ozone is harmful to human health.
(3) In sterilization with ultraviolet rays, ultraviolet rays are not transmitted unless the liquid (water) to be treated is transparent, and sterilization is not possible with turbid liquids.
(4) In sterilization using ultrasonic waves, the amount of treatment is extremely small because the water to be treated must be in the form of a film.
In addition, although it is also considered to sterilize by irradiating ultrasonic waves without forming a film of water, in this case, the sterilization efficiency is greatly reduced.

  Furthermore, in the prior art, “filtration” and “microbe sterilization” are performed in separate processing steps, so that each processing facility is required, and the processing facility is enlarged.

  In view of the above prior art, the present invention can simultaneously perform filtration of a treatment liquid and sterilization of microorganisms without using a chemical agent, and can quickly filter and sterilize a large amount of treatment liquid. An object of the present invention is to provide a filtration and sterilization apparatus that can prevent clogging of the water.

  The configuration of the present invention that solves the above-described problems includes a metal filter that filters the processing liquid through the processing liquid and an ultrasonic transducer that transmits ultrasonic vibration to the metal filter.

  Further, the configuration of the present invention includes a metal filter that filters the treatment liquid through the treatment liquid, an ultrasonic vibrator that transmits ultrasonic vibration to the metal filter, and an oscillation current is supplied to the ultrasonic vibrator. And an ultrasonic oscillator.

  In addition, the configuration of the present invention includes a hollow container through which the processing liquid flows, a metal filter disposed inside the hollow container in a state in which the processing liquid flowing through the hollow container permeates, and It has an ultrasonic transducer that transmits ultrasonic vibrations, and an ultrasonic oscillator that supplies an oscillation current to the ultrasonic transducer.

  In addition, the configuration of the present invention is formed with a hollow container to which a processing solution is supplied and a cylindrical shape and both end surfaces are closed, and is disposed in the hollow container, and is arranged from the outer peripheral surface side to the inner side. A metal filter that discharges the processing liquid that has permeated to the peripheral surface side from one end face, an ultrasonic vibrator that is fixed to the other end face of the metal filter, and an ultrasonic wave that supplies an oscillating current to the ultrasonic vibrator And an oscillator.

  In addition, the configuration of the present invention includes a metal filter in which a hollow filter container is filled with a metal wire, and the processing liquid passes through the filter container to filter the processing liquid, and the metal filter is subjected to ultrasonic vibration. And an ultrasonic oscillator for supplying an oscillating current to the ultrasonic vibrator.

  Further, the configuration of the present invention is characterized in that the ultrasonic transducer is directly fixed to the metal filter.

  Moreover, the structure of this invention has arrange | positioned the titanium dioxide member in the state contacted with the said metal filter, It is characterized by the above-mentioned.

ADVANTAGE OF THE INVENTION According to this invention, when a process liquid permeate | transmits a metal filter, the filtration and removal process which removes the dust etc. which are contained in a process liquid can be performed rapidly.
In addition, since the ultrasonic vibration generated by the ultrasonic vibrator is transmitted to the metal filter, the ultrasonic wave is radiated to the mesh part of the metal filter and the ultrasonic wave is reliably and effectively applied to the processing liquid that passes through the mesh part. Can be irradiated. For this reason, the microorganisms contained in the process liquid which permeate | transmits the mesh part of a metal filter can be disinfected rapidly and reliably.
As a result, a large amount of processing liquid can be quickly and surely filtered and sterilized, and no chemicals are used at all, and the safety is high.

The best mode for carrying out the present invention will be described below in detail based on examples.
In the following description, “treatment liquid” is used to mean not only water and hot water but also liquids including various liquids and solvents.

FIG. 1 shows a filtration / sterilization apparatus 1 according to Embodiment 1 of the present invention.
In the filtration / sterilization apparatus 1, a cylindrical metal filter 10 is used as a filter. As the metal filter 10, a laminated metal mesh is formed in a cylindrical shape and fired, or a metal mesh in which a metal wire is formed in a cylindrical shape is welded to a support rod, and a slit is formed between the metal wires. Various metal filters suitable for liquid filtration such as a metal filter can be used.

  In this example, a metal filter 10 having a filter mesh diameter of, for example, 1 μm to 200 μm is employed.

  The bottom surface of the cylindrical metal filter 10 is closed by a metal closing plate 11. The upper surface of the metal filter 10 is closed with an end plate 13 having an extraction tube 12. For this reason, the filter chamber R0, which is the internal space of the metal filter 10, can communicate with the outside via the extraction pipe 12.

An ultrasonic transducer 20 is fixed to the lower surface side of the closing plate 11 of the metal filter 10 by welding or the like. The ultrasonic oscillator 21 is disposed outside an outer shell (hollow container) 30 described later. The electric wire 22 is connected to the ultrasonic transducer 20 and penetrates the outer shell 30 in a waterproof state. The ultrasonic vibrator 20 and the ultrasonic oscillator 21 are connected by the electric wire 22.
When an oscillating current is supplied from the ultrasonic oscillator 21 to the ultrasonic transducer 20, the ultrasonic transducer 20 oscillates to generate ultrasonic waves. The oscillation frequency of the ultrasonic transducer 20 is, for example, 20 KHz, 40 KHz, or 1 MHz.

  Since the ultrasonic vibrator 20 is fixed to the closing plate 11 of the metal filter 10, the vibration of the ultrasonic vibrator 20 is transmitted to the cylindrical metal filter 10 and the entire metal filter 10 vibrates. That is, since both the closing plate 11 and the metal filter 10 are metal, ultrasonic vibration is transmitted well. As a result, an ultrasonic wave is generated from the metal filter 10, and this ultrasonic wave propagates also in the mesh portion which is a fine transmission space of the metal filter 10.

The outer shell (hollow container) 30 is disposed so as to surround the metal filter 10. For this reason, a supply chamber R <b> 1 is formed between the inner peripheral surface of the outer shell 30 and the outer peripheral surface of the metal filter 10.
A flange portion 31 is formed at the upper portion of the outer shell 30, and a through pipe 32 is formed at the center of the flange portion 31.

  The plurality of support springs 33 have upper ends connected to the lower surface of the flange portion 31 and lower ends connected to the upper surface of the end plate 13 of the metal filter 10. Thereby, the metal filter 10 is suspended and arranged below the flange portion 31 by the plurality of support springs 33.

  The take-out pipe 12 of the metal filter 10 and the through pipe 32 formed on the flange 31 of the outer shell 30 are communicated with each other by a cylindrical buffer rubber pipe 34.

Furthermore, the funnel member 35 is arrange | positioned among the inner surfaces of the outer shell 30 in the position below the position where the metal filter 30 is arrange | positioned. The funnel member 35 has a conical surface whose opening area is narrowed toward the lower side, and a lower end is a lower end opening 35a.
The recovery chamber R2 is located below the funnel member 35 in the inner space of the outer shell 30. The recovery chamber R2 and the supply chamber R1 communicate with each other via a lower end opening 35a of the funnel member 35.

The filtrate tank 40 is bolted to the flange portion 31 of the outer shell 30 via the flange portion 41. A through hole 42 is formed at the center of the flange portion 41 of the filtrate tank 40, and this through hole 42 is formed in alignment with the through pipe 32 of the flange portion 31.
For this reason, the filtrate chamber R3, which is the internal space of the filtrate tank 40, communicates with the filter chamber R0, which is the internal space of the metal filter 10, via the through hole 42, the through tube 32, the buffer rubber tube 34, and the extraction tube 12. ing.

The supply pipe L1 is connected to the outer shell 30 and supplies the processing liquid to the supply chamber R1. When the processing liquid flows through the outer shell 30 via the supply pipe L 1, the processing liquid flows through the outer shell 30 and is discharged through the through pipe 32.
The drain pipe L2 is connected to the bottom of the outer shell 30 and a valve V is interposed.
The filtrate pipe L3 is connected to the top surface of the filtrate tank 40, and discharges the treatment liquid in the filtrate chamber R3.

When filtration and sterilization of processing liquid containing dust (dust, contaminants, dirt, earth and sand) and microorganisms by the filtration / sterilization apparatus 1 having such a configuration,
(A) While supplying the processing liquid fed by a pump (not shown) or the like into the supply chamber R1 through the supply pipe L1,
(B) Sending an oscillating current from the ultrasonic oscillator 21 to the ultrasonic vibrator 20 to vibrate the ultrasonic vibrator 20 ultrasonically,
(C) The valve V is closed.

When the states (a) to (c) are set, the processing liquid (such as dust and water mixed with microorganisms) is supplied to the supply chamber R, and the processing liquid supplied to the supply chamber R1 is the metal filter 10. Is transmitted from the outer peripheral side toward the inner peripheral side. By passing through the metal filter 10, dust and the like are filtered and removed by the metal filter 10, and a treatment liquid that does not contain dust enters the filter chamber R 0.
The heavy dust or the like that has been filtered and removed settles in the supply chamber R1, passes through the lower end opening 35a of the funnel member 35, and settles in the recovery chamber R2.

When the processing liquid passes through the metal filter 10, the processing liquid passes through the mesh portion of the metal filter 10, that is, a very fine transmission space (a space having a gap interval of 1 μm to 200 μm). At this time, as described above, the ultrasonic vibration generated from the ultrasonic transducer 20 is transmitted to the metal filter 10, thereby generating an ultrasonic wave from the metal filter 10, and thus this ultrasonic wave propagates in the mesh portion.
Accordingly, ultrasonic waves are irradiated to the processing liquid that passes through the mesh portion of the metal filter 10.

As a result, when the microorganism (the size is about 0.5 μm to 1 μm) contained in the treatment liquid passes through the mesh portion of the metal filter 10, it is irradiated with ultrasonic waves to be destroyed and killed. Moreover, since the mesh portion of the metal filter 10 is a very fine space (gap), sterilization with ultrasonic waves is effectively and reliably performed.
In other words, ultrasonic waves are reliably irradiated in a fine space, a cavitation valve is generated, and a shock wave caused by the collapse of the cavitation bubble surely acts on microorganisms passing through the fine space for efficient and reliable sterilization. It is done.

Since the metal filter 10 has an extremely large number of mesh portions, a large amount of processing liquid permeates through the metal filter 10 and is quickly filtered. And this large amount of processing liquid is reliably sterilized when passing through the mesh part which is a fine space.
Therefore, microorganisms can be quickly and reliably sterilized while rapidly filtering a large amount of processing liquid.

  Furthermore, since the ultrasonic vibration generated from the ultrasonic transducer 20 is transmitted to the metal filter 10, dust or the like adhering to the metal filter 10 is easily peeled off from the metal filter 10 due to vibration, and the metal filter 10 is prevented from being clogged. Can also be planned.

  Although the metal filter 10 vibrates ultrasonically, the metal filter 10 is supported by being suspended from the flange portion 31 by a support spring 33, and the buffer rubber tube 34 buffers the ultrasonic vibration. There is almost no transmission of ultrasonic vibration to 41. For this reason, the flange parts 31 and 41 are not loosened by ultrasonic vibration.

By passing through the metal filter 10, dust and the like are filtered and removed, and the sterilized processing liquid passes through the extraction pipe 12, the buffer rubber pipe 34, the through pipe 32, and the through hole 42 from the filter chamber R 0. It enters the filtrate chamber R3 of the tank 40.
The treatment liquid in the filtrate chamber R3 exits through the filtrate pipe L3 and is reused or discharged to the outside.

  The processing in the filtrate chamber R3 can be performed by instantaneously supplying the processing liquid from the outside into the filtrate chamber R3 via the filtrate pipe L3 or by supplying compressed air instantaneously into the filtrate chamber R3. The liquid enters the filter chamber R0, whereby the processing liquid in the filter chamber R0 blows out from the inner peripheral side to the outer peripheral side of the metal filter 10 so that the metal filter 10 can be backwashed.

  Further, when a large amount of dust or the like is accumulated in the recovery chamber R2, the valve V can be temporarily opened to discharge the dust or the like together with the processing liquid through the drain pipe L2.

  As described above, in the filtration / sterilization apparatus 1, a large amount of processing liquid can be filtered by passing the processing liquid through the ultrasonically vibrated metal filter 10, and microorganisms contained in the large amount of processing liquid can be filtered. Sterilization can also be performed at the same time. Moreover, it is not necessary to use any chemicals such as chlorine.

[Modification]
In the embodiment shown in FIG. 1, the ultrasonic transducer 20 is directly fixed to the metal filter 10 (directly fixed to the closing plate 11 of the metal filter 10). It is only necessary that the ultrasonic vibration of the vibrator 20 is transmitted to the metal filter 10.
For example, in the example shown in FIG.
(i) Eliminate the buffer rubber tube 34 and the support spring 33,
(ii) The extraction pipe 12 of the metal filter 10 and the through hole 32 of the outer shell 30 are directly connected,
(iii) fixing the ultrasonic transducer 20 to the outer peripheral surface of the outer shell 30;
Such a configuration can also be adopted.

In this way, the ultrasonic vibration of the ultrasonic transducer 20 can propagate to the metal filter 10 through the path of the outer shell 30 → the flange 31 → the through pipe 32 → the extraction pipe 12 → the end plate 13. The metal filter 10 can generate ultrasonic waves by ultrasonic vibration.
As a result, the same operation and effect as the filtration / sterilization apparatus 1 shown in FIG. 1 can be obtained.

In addition, when employ | adopting this modification, in order to prevent the looseness between the flange parts 31 and 41, it is necessary to devise as a fastening means of the flange parts 31 and 41 so that a looseness does not generate | occur | produce.
For example, a method of interposing a cushioning material between the flanges, sandwiching both flanges by a spring member, or welding both flanges is employed.

In the embodiment shown in FIG. 1, the cylindrical metal filter 10 is used, but a flat metal filter may be used.
For example, the processing liquid is allowed to flow from the one end surface side of the outer shell 30 toward the other end surface side, and a flat metal filter is placed in the outer shell 30 so that all of the processing liquid flowing in this way can pass therethrough. Deploy. And it is set as the structure which adheres the ultrasonic transducer | vibrator 20 to a flat metal filter.

  Even if such a configuration is adopted, the same operation and effect as the filtration / sterilization apparatus 1 shown in FIG. 1 can be obtained.

Next, a filtration / sterilization apparatus 1A according to Embodiment 2 of the present invention will be described with reference to FIG. This filtration / sterilization apparatus 1A is obtained by disposing a titanium dioxide member 50 in a metal filter 10 in addition to the filtration / sterilization apparatus 1 shown in FIG.
Since the other parts are the same as those in the first embodiment, the same reference numerals are given to the same parts as those in the first embodiment, and a duplicate description is omitted.

The titanium dioxide member 50 is a cylindrical member having an open upper surface and a closed bottom surface, and a large number of holes having a diameter of about 1 to 2 mm are formed in the cylindrical portion. The titanium dioxide member 50 is obtained by applying titanium dioxide (TiO ₂ ) to a cylindrical base material (metal or resin) by plating, coating, or kneading.

Since the upper surface of the titanium dioxide member 50 is connected to the lower surface of the end plate 13 of the metal filter 10, the ultrasonic vibration generated from the ultrasonic vibrator 20 is transmitted and vibrates.
When the titanium dioxide member 50 is ultrasonically vibrated, OH radicals are generated as shown in Non-Patent Document 2.

In the filtration / sterilization apparatus 1 </ b> A according to the second embodiment, the treatment liquid is filtered and sterilized by ultrasonic waves when passing through the metal filter 10. Further, it passes through the titanium dioxide member 50 and flows into the filtrate chamber R3.
At this time, since OH radicals are generated in the titanium dioxide member 50, further sterilization is performed by the OH radicals.
In addition, OH radicals also act to decolorize and deodorize. For this reason, when an odor component and a pigment | dye are contained in the process liquid, decoloring and deodorizing can be performed by the effect | action of OH radical.

  In addition, an ultrasonic vibrator different from the ultrasonic vibrator 20 may be attached to the titanium dioxide member 50, and the titanium dioxide member 50 may be vibrated ultrasonically by this separate ultrasonic vibrator.

[Modification]
In the second embodiment, the cylindrical titanium dioxide member 50 is disposed in the metal filter 10, but other modifications are also conceivable.
For example, in the filtration / sterilization apparatus 1 shown in FIG. 1, a large number of granular titanium dioxide particles are placed in the metal filter 10, and the titanium dioxide particles are placed on the upper surface of the metal filter 10 (per the lower end surface of the extraction pipe 12). Set outflow prevention net to prevent outflow.
As the granular titanium dioxide particle member, a granular material obtained by kneading titanium dioxide into a resin having a specific gravity lighter than water can be used. The diameter of the titanium dioxide grain member is, for example, 0.5 mm to 2 mm.

  Even in this way, the vibration of the ultrasonic vibrator 20 is transmitted to the titanium dioxide particle member via the aqueous solution, and this titanium dioxide particle member can generate OH radicals to perform sterilization, decolorization, and deodorization.

Next, a filtration / sterilization apparatus 100 according to Embodiment 3 of the present invention will be described with reference to FIG.
The metal filter 110 used in the filtration / sterilization apparatus 100 has a large number of fibrous crimps in a filter container in which one end surface of the cylindrical member 111 is closed with an end plate 112 and the other end surface is closed with an end plate 113. A (cotton-like) stainless steel wire 114 is closely packed.

  Two propagation plates 120 and 121 are fixed to the outer peripheral surface of the cylindrical member 111. The propagation plates 120 and 121 extend along the axial direction of the cylindrical member 111 and are arranged at positions shifted by 180 ° with respect to the circumferential direction of the cylindrical member 111.

Ultrasonic transducers 130, 131, and 132 are attached to the propagation member 120, and ultrasonic transducers 133, 134, and 135 are attached to the propagation member 121.
In addition, an ultrasonic transducer 136 is attached to the end plate 112.

An oscillation current is supplied from the ultrasonic oscillator 137 to the ultrasonic transducers 130 to 136 via electric wires (not shown). Each of the ultrasonic transducers 130 to 137 oscillates when an oscillation current is supplied.
When each of the ultrasonic vibrators 130 to 135 vibrates, the vibration reaches the cylindrical member 111 via the propagation plate 120, and ultrasonic waves are generated from the cylindrical member 111. Similarly, when the ultrasonic transducer 136 vibrates, the end plate 112 vibrates and ultrasonic waves are generated from the end plate 112.
The generated ultrasonic waves irradiate the mesh portions, which are fine transmission spaces between the stainless wire 114, with ultrasonic waves.

  The supply pipe L <b> 11 is connected to the lower part of the cylindrical member 111 and supplies treated water into the metal filter 110. The filtrate pipe L12 is connected to the end plate 113, and discharges the processing liquid that has circulated through the metal filter 110 to the outside.

In the filtration / sterilization apparatus 100 having the above-described configuration, the treatment liquid is filtered and sterilized as follows.
First, an oscillating current is supplied from the ultrasonic oscillator 137 to the ultrasonic vibrators 130 to 136, and the ultrasonic vibrators 130 to 136 are ultrasonically vibrated so that a mesh portion which is a fine transmission space between the stainless wire 114. To be irradiated with ultrasonic waves.

At this time, when the processing liquid is supplied into the metal filter 110 through the supply pipe L11, the processing liquid permeates through a mesh portion, which is a minute gap between the stainless wire 114, so that dust and the like are filtered and removed.
Further, when the treatment liquid passes through the mesh portion between the stainless wire 114, the microorganisms are destroyed and sterilized by irradiation with ultrasonic waves.

  The processing liquid thus filtered and removed of dust and sterilized is discharged through the filtrate pipe L12.

[Modification]
3, in the filter container of the metal filter 110, by filling not only the stainless steel wire 114 but also the titanium dioxide particle member, OH radicals are generated from the titanium dioxide particle member, This OH radical can be sterilized, deodorized and decolorized.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram which shows the filtration and sterilization apparatus which concerns on Example 1 of this invention. The block diagram which shows the filtration / sterilization apparatus which concerns on Example 2 of this invention. The block diagram which shows the filtration and sterilizer which concerns on Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A Filtration and sterilizer 10 Metal filter 20 Ultrasonic vibrator 21 Ultrasonic oscillator 30 Outer shell 40 Filtrate tank 50 Titanium dioxide member 100 Filtration and sterilizer 111 Cylindrical member 114 Stainless steel wire 130-136 Ultrasonic vibrator 137 Ultrasonic wave Oscillator

Claims (7)

A metal filter that filters the treatment liquid through the treatment liquid;
An ultrasonic transducer for transmitting ultrasonic vibration to the metal filter;
A filtration / sterilization apparatus comprising: A metal filter that filters the treatment liquid through the treatment liquid;
An ultrasonic transducer for transmitting ultrasonic vibration to the metal filter;
An ultrasonic oscillator for supplying an oscillating current to the ultrasonic vibrator;
A filtration / sterilization apparatus comprising: A hollow container through which the processing liquid flows;
A metal filter disposed inside the hollow container in a state where the treatment liquid flowing through the hollow container is permeated;
An ultrasonic transducer for transmitting ultrasonic vibration to the metal filter;
An ultrasonic oscillator for supplying an oscillating current to the ultrasonic vibrator;
A filtration / sterilization apparatus comprising: A hollow container to which a processing liquid is supplied;
Metal that has a cylindrical shape and is closed at both end surfaces, and is disposed in the hollow container, and discharges the processing liquid that has permeated from the outer peripheral surface side to the inner peripheral surface side from one end surface. Filters,
An ultrasonic transducer fixed to the other end face of the metal filter;
An ultrasonic oscillator for supplying an oscillating current to the ultrasonic vibrator;
A filtration / sterilization apparatus comprising: A metal filter that is filled with a metal wire in a hollow filter container, and the treatment liquid passes through the filter container to filter the treatment liquid;
An ultrasonic transducer for transmitting ultrasonic vibration to the metal filter;
An ultrasonic oscillator for supplying an oscillating current to the ultrasonic vibrator;
A filtration / sterilization apparatus comprising: In claim 3 or claim 5,
The filtration / sterilization apparatus, wherein the ultrasonic transducer is directly fixed to the metal filter. In any one of Claims 1 to 6,
A filtration / sterilization apparatus, wherein a titanium dioxide member is disposed in contact with the metal filter.

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