JPH07284764A - Method and apparatus for treating waste water containing bacteria - Google Patents

Abstract

PURPOSE:To treat waste water containing bacteria by a simple apparatus without using a chemical agent. CONSTITUTION:A cylindrical treatment container main body 1 is formed of transparent ultraviolet-pervious glass and a waste water inflow port 2 and an outflow port 3 allowing treated waste water to flow out are formed to the treatment container main body 1. Granular titanium dioxide (photocatalyst) 8 with a particle size of 5mm-1cm is packed in the treatement container main body 1 so as to come into contact with waste water in the treatment container main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating wastewater containing fungi, and particularly to treating fungi such as microorganisms, infectious bacteria and general pathogens contained in wastewater discharged from hospitals, research facilities and the like. It is a proposal for a method and a device for effective sterilization.

[0002]

2. Description of the Related Art In operating rooms, clean rooms, clean booths, biohazard rooms, etc. installed in hospitals, pathological laboratories, clinical laboratories, etc., microorganisms, infectious fungi and general pathogens (hereinafter collectively referred to as fungi) ) Is usually handled, and the inside of such a facility is usually sterilized by means such as chemicals and UV irradiation.

On the other hand, during or after using such a facility, ion-exchanged water or cleaning liquid is used for cleaning surgical instruments, experimental instruments, etc. to be used. Since the wastewater may contain fungi, it is discharged after being sterilized with a chlorine-based agent or a chemical such as cresol. It should be noted that wastewater such as dehumidified water from an air conditioner provided in such a facility is directly discharged outside the facility.

[0004]

The above-mentioned method for disinfecting fungi by chemicals requires a large-scale treatment facility in a facility with a large amount of wastewater treatment such as a hospital, and also increases the amount of chemicals used. Occurrence of secondary pollution due to may be a problem. However, there is a limit to reducing the amount of the drug used because it has a problem that it cannot be completely sterilized when the amount of the drug used is reduced.

[0005] In such a facility, the fungi that are floating are included in the drainage of the cleaning liquid or the drainage of the dehumidified water of the air conditioner and flow away without being noticed. The wastewater contained is not particularly problematic, but wastewater such as dehumidified water from the air conditioner that has not been treated and flows directly out of the facility may contaminate rivers and sewers with fungi.

[0006] As a means for treating wastewater containing such fungi, it is possible to use the above-mentioned cresol or chlorine-based bactericide, but since large-scale treatment equipment is required and the amount of chemicals used increases, Occurrence of secondary pollution due to drugs may be a problem.

It is an object of the present invention to provide a wastewater treatment method and apparatus capable of easily treating wastewater containing fungi without using any chemicals.

[0008]

To achieve the above object, the present invention has the following features. That is, in a method for treating wastewater containing fungi, by irradiating a photocatalyst with a light source and bringing the wastewater into contact with the photocatalyst, the method for treating wastewater containing fungi is characterized by killing and killing the fungi in the wastewater. is there.

The photocatalyst is preferably titanium oxide, and the light source is preferably ultraviolet light, fluorescent light or sunlight.

Further, as an apparatus for treating wastewater containing fungi of the present invention, 1. An apparatus for treating wastewater containing fungi, comprising a treatment container main body for sterilizing the fungi in the wastewater, and an inlet provided in the treatment container main body for allowing the wastewater to flow into the treatment container main body. An outlet for discharging treated wastewater to the outside of the processing container main body, a light source mounted in the processing container main body or in the vicinity of the processing container, and inside the processing container main body, and the processing container An apparatus for treating wastewater containing fungi, comprising: a photocatalyst arranged so as to be in constant contact with the wastewater flowing into the interior.

2. A device for treating wastewater containing fungi, which has a translucent treatment container body for sterilizing the fungi in the wastewater, and the wastewater provided in the treatment container body and flowing into the treatment container body. And an outlet for discharging treated wastewater to the outside of the processing container main body, and an outlet for discharging treated wastewater to the outside of the processing container main body, which is disposed in the container main body and in constant contact with the wastewater flowing into the container. And a photocatalyst, and a treatment device for wastewater containing fungi is proposed.

The light source may be any one of an ultraviolet irradiation lamp, a fluorescent lamp and sunlight, or a combination thereof. When using sunlight or fluorescent light,
The light source does not need to be attached to the processing container or the vicinity thereof. For example, the entire processing container may be made of a translucent material such as glass and may be processed at a place where it is exposed to sunlight or the like.

The photocatalyst is made of any one of titanium oxide such as TiO ₂ , cadmium selenide, and strontium titanate. If necessary, a catalyst prepared by coating titanium oxide with a noble metal such as platinum or palladium is used. be able to.

[0014]

In the method for treating wastewater containing fungi of the present invention, since the photocatalyst is irradiated with a light source and the wastewater is brought into contact with the photocatalyst, the photocatalyst can be oxidized and reduced without using any chemical agent. It is possible to sterilize and kill the fungi in the waste, and the wastewater treatment apparatus of the present invention is a treatment container body for sterilizing the fungi in the wastewater, and the wastewater treatment device provided in the treatment container body. An inlet for inflowing into the container body, an outlet for discharging treated wastewater to the outside of the processing container body, a light source mounted in the processing container body or in the vicinity of the processing container, and the container Since the photocatalyst is provided in the main body and in a state of being constantly in contact with the wastewater flowing into the container, the fungi in the wastewater can be killed and killed completely in a short time. ,
The device can be downsized.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The waste treatment method and apparatus of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of a treatment apparatus for wastewater containing fungi according to the present invention. The cylindrical processing container main body 1 is formed of a thick transparent ultraviolet light-transmissive glass, and the processing container main body 1 includes drainage pipes in an operating room, a clean room, a clean booth, a biohazard room, and drainage of an air conditioner. A drainage inlet 2 which is directly connected to the above and an outlet 3 through which the treated wastewater is discharged are provided in the upper part of the processing container body 1 so as to face each other at substantially the same height.

Further, a vent hole 5 for the air inside the container having an antibacterial filter 4 at the tip is provided on the upper part of the processing container body 1. Further, inside the processing container main body 1, the processing container 1 is fixed to the upper lid 6 substantially at the center.
A partition plate 7 that extends to almost the lower end of is attached. In addition, the inside of the processing container body 1 is 3 mm to 5 mm.
Granular titanium dioxide (photocatalyst) 8 having a diameter of mm is loaded in the processing container body 1 so as to come into contact with the waste water in the processing container 1.

In order to treat wastewater containing fungi by the wastewater treatment apparatus having the above-mentioned structure, the wastewater is continuously flown into the treatment container body 1 through the inflow port 2 and then flowed as shown by an arrow in the figure. Thus, the fungus in the wastewater can be decomposed and removed by a simple means in which the wastewater and the photocatalyst are brought into contact with each other to kill and kill the fungus in the wastewater by the oxidation and reduction action of the photocatalyst and to be discharged from the outlet 3.

The partition plate 7 is provided to extend the contact time between the wastewater and the photocatalyst to completely and surely kill the fungi in the wastewater, and the partition plate 7 flows in from the inflow port 2. Any structure may be used as long as the drainage does not immediately flow from the outlet 3.

Further, since the processing container main body 1 is formed of glass having translucency, the photocatalyst 8 loaded inside the processing container 1 receives the sunlight entering the room and the light of the fluorescent lamp in the room. However, if the photocatalytic function is insufficient, an ultraviolet irradiation lamp can be attached to the inside or outside peripheral wall of the processing container body 1.

Here, the photocatalyst 8 such as titanium dioxide decomposes the fungi in the waste water because when the photocatalyst is irradiated with a light source such as ultraviolet rays or sunlight, the surface of the photocatalyst 8 is strongly oxidized and reduced. This is because it occurs and decomposes fungi.

If an ultraviolet light emitting lamp is used, the upper space of the container can be sterilized by the sterilizing power of ultraviolet rays.

In addition, in the upper part of the processing container body 1 of the present invention,
When the fungus disperses without being decomposed, the vent hole 5 is provided to capture the fungus and to prevent the internal pressure of the processing container body 1 from rising.
However, the antibacterial filter 4 attached to the tip can be attached with a deodorizing function.

Further, it is preferable that the inner wall of the processing container main body 1 has a structure in which fungi does not easily adhere, but if antibacterial is made by means such as chemical coating or impregnation of antibacterial agent, even if fungi adheres to the wall surface It is possible to sterilize the fungi that have been used.

Before the inlet 2 of the processing container body 1,
A reservoir tank can be provided to cut out a certain amount of drainage.

FIG. 2 shows another embodiment of the waste water treatment apparatus containing fungi of the present invention. The processing container body 10 is
An ultraviolet irradiation lamp 11 is attached to the outer side wall of the processing container body 10 and is made of a resin having a property of transmitting ultraviolet rays.

Further, the processing container body 10 is provided with a drainage inlet 12 at an upper portion thereof and an automatic discharge valve 1 at a lower end portion thereof.
An outlet 14 for the treated wastewater is provided with 3. Inside the processing container body 10, plate-like columns 15 in which granular titanium dioxide (photocatalyst) having a diameter of 3 mm to 5 mm is loaded are fixed to the side wall of the processing container body 10 in layers at predetermined intervals.

As shown in FIG. 3, the plate column 15 is composed of a transparent plate column 15a made of an acrylic resin and having a void inside. A plurality of plate columns 15a are provided on the surface thereof. Small holes 15b are provided (though not shown, a plurality of small holes are also provided on the back surface of the front surface portion).

Then, in the void of the plate-like column 15,
The granular photocatalyst 16 is filled. In addition, plate column 1
For 5, a light-transmitting resin having a small hole for preventing the granular photocatalyst from falling, light-transmitting glass, or a metal mesh with fine mesh can be used.

The outer side wall of the processing container body is
A drainage circulation pipe 18 having a pump 17 for circulating the drainage and increasing the chances of contact between the drainage and the photocatalyst is attached.

Further, at the lower end of the processing container body 10 is provided a drainage outlet 20 having a valve 19 which opens and closes after a certain period of time.

To treat wastewater containing fungi with the wastewater treatment apparatus having the above-described structure, a certain amount of wastewater is introduced into the container body through the wastewater inlet 12, and the ultraviolet irradiation lamp 1
When the pump 17 is operated in the state where 1 is turned on, the wastewater in the processing container body 1 is taken into the wastewater circulation pipe 18 from the lower end of the wastewater circulation pipe 18, and the circulation pipe 18
It is circulated again from the upper end to the main body of the processing container, and this is repeated.

And a fixed time (about 10 minutes to 1 hour)
When the wastewater is circulated, the fungi present in the wastewater are killed by sterilization by the oxidation and reduction actions of the photocatalyst, and thereafter the automatic valve 13 is opened and discharged from the outlet 14.

When the drainage of the wastewater is completed, a certain amount of the wastewater is made to flow into the treatment main body container 10 again, and this treatment operation is repeated, whereby the wastewater can be treated continuously.

The material of the processing container body 10 may be any material such as glass or plastic as long as it has ultraviolet light transparency.

Incidentally, such a wastewater treatment device can be installed in a room such as an operating room, a clean room, a clean booth, a biohazard room or the like, or can be installed outdoors.

[0036]

INDUSTRIAL APPLICABILITY As described above, the method and apparatus for treating wastewater containing fungi of the present invention kills and kills the fungi in the wastewater by utilizing the oxidation and reduction power of the photocatalyst without using chemicals. be able to.

In particular, the wastewater sterilizing apparatus of the present invention can completely sterilize and kill the fungi in the wastewater in a short time, so that the sterilization time of the wastewater can be shortened, and The device can be downsized.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a treatment apparatus for wastewater containing fungi of the present invention.

FIG. 2 is an explanatory view showing another embodiment of the wastewater treatment apparatus containing fungi of the present invention.

FIG. 3 is a perspective view of a plate column of the present invention.

[Explanation of symbols]

 1 ... ・ Processing container main body 2 ... Inflow port 3 ... Outflow port 6 ... Lid 7 ... Partition plate 8 ... Titanium dioxide (photocatalyst) 10 ... Treatment Container body 11 ... Ultraviolet irradiation lamp 12 ... Inflow port 13 ... Outflow port 15 ... Plate column 17 ... Pump

Claims (7)

[Claims] 1. A method for treating wastewater containing fungi, which comprises sterilizing and killing the fungi in the wastewater by irradiating the photocatalyst with a light source and bringing the wastewater into contact with the photocatalyst. Processing method. 2. The method for treating wastewater containing fungi according to claim 1, wherein the photocatalyst is a granular material made of any one of titanium oxide, cadmium selenide and strontium titanate. 3. The method for sterilizing wastewater containing fungi according to claim 1, wherein the light source is ultraviolet light, fluorescent light, or sunlight. 4. A device for treating wastewater containing fungi, comprising:
A processing container body for sterilizing the fungi in the wastewater,
An inflow port provided in the processing container body for inflowing the wastewater into the processing container body, an outflow port for discharging treated wastewater to the outside of the processing container body, and in the processing container body or A light source mounted in the vicinity of the periphery of the processing container main body; and a photocatalyst disposed in the processing container main body and always in contact with the drainage flowing into the processing container. Treatment equipment for wastewater containing fungi. 5. A device for treating wastewater containing fungi, comprising:
A translucent treatment container body for sterilizing the fungi in the wastewater, an inflow port provided in the treatment container body for allowing the wastewater to flow into the treatment container body, and the treated wastewater. An outlet for discharging to the outside of the processing container body,
An apparatus for treating wastewater containing fungi, comprising: a photocatalyst that is provided in the container body and is always in contact with the wastewater flowing into the container. 6. The apparatus for treating wastewater containing fungi according to claim 4, wherein the light source is an ultraviolet irradiation lamp, a fluorescent lamp or sunlight. 7. The apparatus for treating wastewater containing fungi according to claim 4 or 5, wherein the photocatalyst is a granular material made of any one of titanium oxide, cadmium selenide, and strontium titanate. .