JP7093564B2 - Infectious waste treatment equipment - Google Patents

Description

The present invention relates to, for example, a wastewater treatment method and a treatment device in a medical institution, and particularly to an infectious waste treatment device generated during surgery or dissection.

Blood is mixed in the wastewater of waste generated during surgery and dissection, and there is a high possibility that it is contaminated with pathogens. Appropriate treatment is stipulated. The conventional recommended treatment method is to heat the wastewater to 80 ° C and sterilize it by heating. Except for large-scale medical institutions, most medical institutions were treated with general wastewater and discharged into sewage and rivers without sufficient sterilization treatment.

In view of this situation, the applicant has already proposed a wastewater treatment method and a treatment device for infectious waste as described in Patent Document 1. By performing sterilization with chlorine dioxide as a pretreatment for ozone treatment, this treatment device enables efficient sterilization without increasing the size of the treatment equipment and reduces the impact on the environment. there were. In particular, it has been confirmed that the combination of chlorine dioxide and ozone can sterilize spore-forming bacteria such as anthrax, inactivate viruses, remain chemicals, and decompose various toxic substances.

Japanese Patent No. 3496094

The equipment of Patent Document 1 is small in size, has high sterilizing ability, and is adopted by many medical institutions. However, in order to develop lower cost and more efficient processing equipment, such as fine bubble and ultra fine bubble. We focused on the technology of fine bubbles.
An object of the present invention is to provide an infectious waste treatment apparatus capable of efficiently treating infectious waste at a lower cost by using fine bubbles.

In order to achieve the above object, the infectious waste treatment apparatus according to the present invention is used.
A treatment tank, a wastewater supply means for supplying wastewater containing infectious waste to the treatment tank, a circulation means for circulating the wastewater from the treatment tank through a circulation path and returning the wastewater to the treatment tank, and a treated wastewater are discharged. In an infectious waste treatment device equipped with a release means,
The circulation passage includes a transport passage from the outlet of the treatment tank to a branch portion with the discharge passage of the discharge means, and a return passage from the branch portion to the return port of the treatment tank.
The transport passage is provided with a fine bubble generating means for generating fine bubbles of ozone, and the return passage is provided with a fine bubble generating means for generating fine bubbles of chlorine dioxide.
It is characterized in that the fine bubbles of chlorine dioxide and the fine bubbles of ozone are simultaneously supplied to the wastewater to proceed with the treatment of the wastewater.

As used herein, the term "fine bubbles" includes microbubbles of 1 μm or more and 100 μm or less and nanobubbles of less than 1 μm, which are collectively referred to as fine bubbles of 100 μm or less.
The upper limit is not strictly defined to 100 μm, but is referred to as a fine bubble in the present specification in the sense that the bubble is smaller than about 100 μm.

According to the present invention, by using fine bubbles, the area of the gas-liquid interface of the fine bubbles of ozone and chlorine dioxide dispersed in the waste water is dramatically increased, which is typified by anthrax existing in the waste water. The probability and degree of exposure of pathogens such as blast fungi, other bacteria, viruses, residual drugs, and various toxic substances to ozone and chlorine dioxide have increased, and their decomposition treatment has been dramatically promoted. Infectious waste can be treated efficiently at lower cost without increasing the size of the treatment equipment.

FIG. 1 is a block diagram of an infectious waste treatment apparatus according to Reference Form 1 of the present invention. FIG. 2 is a block diagram of an infectious waste treatment apparatus according to Reference Form 2 of the present invention. FIG. 3 is a block diagram of an infectious waste treatment apparatus according to Reference Form 3 of the present invention. FIG. 4 is a block diagram of an infectious waste treatment apparatus according to the first embodiment of the present invention.

Hereinafter, the present invention will be described based on the illustrated reference embodiments and embodiments.
[ Reference form 1]
FIG. 1 shows an infectious waste treatment apparatus according to Reference Form 1 of the present invention.
That is, the treatment device 10 is a chlorine dioxide injection device 3 as a chlorine dioxide injection means for injecting chlorine dioxide C as a sterilizing disinfectant into the first treatment tank 1, the second treatment tank 2, and the first treatment tank 1. And the wastewater supply device 5 as a wastewater supply means for supplying the wastewater D containing infectious waste to the first treatment tank 1, and the wastewater D is circulated between the first treatment tank 1 and the second treatment tank 2. A circulation device (circulation means) 7, an ozone supply device (ozone supply means) 8 that supplies ozone to the circulating waste water, a discharge device 9 as a discharge means for discharging the treated waste water, and a first treatment tank. A fine bubble generation device (fine bubble generation means) 200 provided in 1 is provided.

According to the Waste Disposal Law, infectious waste includes pathological waste (organs, tissues, etc.) generated by dissection / surgery, and blood, serum, plasma, etc. generated by dissection / surgery. Although it is classified as infectious industrial waste containing body fluid (including semen), the infectious waste targeted by the present invention mainly corresponds to infectious industrial waste. Of course, it is not limited to the definition of laws and regulations, and can be applied to all medical wastes that need to be sterilized. As chlorine dioxide, it is preferable to use stabilized chlorine dioxide in the form of an aqueous solution, in particular, which is stabilized by dissolving chlorine dioxide in an alkaline solution.

In the illustrated example, the first treatment tank 1 and the second treatment tank 2 are arranged in the equipment room 100 in the basement, but the equipment room 100 may be on the ground. The equipment room 100 is provided with an intake equipment 101 such as an air supply fan for exchanging air in the equipment room 100 and an exhaust equipment 102 such as an exhaust fan, and when cleaning or water leakage occurs. A drainage pump 103 for draining water is provided. This wastewater is returned to the first treatment tank 1 again without being discharged to the outside. The first treatment tank 1 is a closed container, and is provided with an exhaust pipe 11 for exhausting the gas stored in the first treatment tank 1 and a liquid level switch 12. The exhaust pipe 11 is provided in the upper part of the first treatment tank 1, and a deodorizer 13 is provided in the middle of the pipe.

The second treatment tank 2 is a pressure vessel, and a pressure reducing valve 21 and an exhaust passage 22 for exhausting the internal gas are provided at the upper part. An exhaust ozone adsorber 23 is provided in the exhaust passage 22. Further, a pressure gauge 24 for measuring the internal pressure in the second processing tank 2 is provided. The chlorine dioxide injection device 3 includes a tank 31 for storing chlorine dioxide, an injection path 6 connecting the tank 31 and the first treatment tank 1, and a pump 33 for sending chlorine dioxide in the tank 31 to the first treatment tank 1. And have. Further, although not shown, the line of the water supply channel 120 may be branched so that water can be supplied into the tank and the chlorine dioxide concentration can be adjusted. In that case, a stirrer for stirring chlorine dioxide in the tank 31, a liquid level gauge for detecting the liquid level in the tank 31, a limit switch for stopping water supply when the water level reaches a predetermined amount in the tank, etc. are appropriately provided. Be done.

Further, a sprinkler 14 for cleaning is arranged on the upper part of the first treatment tank 1, and a water supply channel 120 is connected to the sprinkler 14. The wastewater supply device 5 includes a drainage channel 51 for flowing wastewater from a waste generation department such as a dissection room, a drainage basin 52 as a foreign matter removing tool for receiving wastewater from the drainage channel 51 and removing foreign matter, and a drainage basin 52. And a supply path 53 that communicates between the first treatment tank 1 and the first treatment tank 1. The position of the drainage basin 52 is higher than that of the first treatment tank 1, and the wastewater flows from the drainage basin 52 into the first treatment tank 1 by gravity. The wastewater supply device 5 is not only supplied directly to the first treatment tank 1 from the waste generation department from the dissection room or the like, but also has a separate temporary storage tank such as a pit to temporarily store the wastewater in the storage tank. You may do it.

Further, the chlorine dioxide injection path 6 directly connects the tank 31 and the first treatment tank 1, but a branch passage 61 leading to the drainage basin 52 is provided in the middle, and a part of the chlorine dioxide C is used in the drainage basin 52. Injecting. Chlorine dioxide supplied to the drainage basin 52 disinfects the drainage basin 52 and is sent to the first treatment tank 1 while disinfecting the supply passage 53 through the supply passage 53. Therefore, chlorine dioxide C is injected through two routes, one is directly injected from the tank 31 and the other is injected through the drainage basin 52, and the branch passage 61, the drainage basin 52 and the supply passage 53 are also injected. It functions as a means for injecting chlorine dioxide, which is a bactericidal disinfectant.

The circulation device 7 includes a circulation path 70 connecting the first treatment tank 1 and the second treatment tank 2, and a circulation pump 73 provided in the circulation passage 70 for circulating wastewater between the first and second treatment tanks 1 and 2. It has a prepared structure.
The circulation passage 70 includes a transport passage 71 connecting the bottom of the first treatment tank 1 and the upper part of the second treatment tank 2, and a return passage 72 connecting the bottom of the second treatment tank and the upper part of the first treatment tank 1. It is equipped with. Two circulation pumps 73 are provided in parallel in the transport passage 71, and one is a spare. A strainer 74 and an electric opening / closing valve 75 for opening / closing the passage are provided on the upstream side of the circulation pump 73 of the transportation passage 71. The ozone supply device 8 includes an ozone supply device 80, an ejector 81 provided in the vicinity of the second treatment tank 2 of the transport passage 71, and an ozone supply path 82 that connects the ozone supply device 8 and the ejector 81. , Is supplied to the wastewater circulating through the ejector 81.

Further, the discharge device 9 for discharging the treated wastewater has a discharge path 91 having one end connected to the circulation path 70 via an electric first switching valve 93 and the other end being released, and a discharge pump provided in the discharge path 91. It is equipped with 92. The discharge pump 92 discharges the wastewater in the first and second treatment tanks through the circulation path 70. At the bottom of the first processing tank 1, a sampling passage 94 connected to the electric second switching valve 95 provided in the return passage 72 is provided, and the discharge from the first processing tank 1 is the sampling passage 94. , It is discharged through two routes, one is a route to the return passage 72 and the discharge passage 91, and the other is a route from the first treatment tank 1 to the transport passage 71 and the second treatment tank 2 and the discharge passage 91. The discharge path from the second treatment tank 2 is discharged through the return passage 72 and the discharge path 91. It may be discharged only from the transport passage 71 without passing through the return passage 72, or may be discharged only from the extraction passage 94 and the return passage 72 in some cases. Further, on the downstream side of the second switching valve 95 of the return passage 72, a sampling passage 130 for taking out and sampling wastewater is provided to inspect the water quality.
The fine bubble generation device 200 is configured to be submerged in the wastewater of the first treatment tank 1, and includes a submersible pump 202 and a nozzle 204 for generating fine bubbles from the wastewater supplied by the submersible pump. For the nozzle 204, for example, if a Venturi type having a portion where the flow path is narrowed and rapidly expands is adopted, cavitation can be caused at the portion where the flow path is rapidly expanded and fine bubbles can be generated. The fine bubbles are mainly fine bubbles having a particle size of 100 μm or less, and include microbubbles having a particle size of 1 μm or more and 100 μm or less and nanobubbles having a particle size of less than 1 μm. The upper limit of the particle size is not strictly defined to 100 μm, but means bubbles smaller than about 100 μm. Further, although it is an ejector type, it is also possible to generate fine bubbles by using a YJ nozzle (trade name of Envirovision Co., Ltd.) in which the intake port is closed.

The waste treatment device having the above configuration operates as follows.
First, the wastewater flowed from the waste generation department such as the dissection room through the drainage channel 51 flows into the supply channel 53 through the drainage basin 52 and is supplied to the first treatment tank 1 through the supply channel 53. On the other hand, at the same time as the wastewater flows into the first treatment tank 1, the pump 33 of the chlorine dioxide injection device 3 is driven to inject a constant amount of chlorine dioxide through the injection path 6. Most of the chlorine dioxide is directly injected into the first treatment tank 1 through the injection passage 6, and a part of the chlorine dioxide is supplied from the injection passage 6 to the drainage basin 52 via the branch passage 61, and from the drainage basin 52 via the supply passage 53. Then, it flows into the first treatment tank 1. Since the wastewater flowing from the drainage basin 52 to the supply channel 53 comes into contact with chlorine dioxide and flows into the first treatment tank 1 while being sterilized, the chemical solution is well mixed with the wastewater and sterilization can be promoted. The chlorine dioxide may be injected only into the first treatment tank 1 without passing through the drainage basin 52, or the entire amount may be injected through the drainage basin 52 without directly injecting into the first treatment tank 1. You may let it inject.

When the amount of wastewater supplied to the first treatment tank 1 reaches a predetermined amount, the supply of wastewater is stopped. The amount of chlorine dioxide C to be injected is determined so that the concentration of chlorine dioxide in the first treatment tank 1 is within a predetermined range.
Next, the fine bubble generator 200 performs a sterilization treatment with fine bubbles of chlorine dioxide C.
In the fine bubble generator 200, the wastewater is sucked into the nozzle 204 by the pump 202 in the first treatment tank 1, and cavitation occurs due to the sudden pressure drop generated in the wastewater flowing into the nozzle 204 and is dissolved in the wastewater. The chlorine dioxide that had been generated is generated as fine bubbles. The microbubbles include those having a mixed size of microbubbles and nanobubbles. These fine bubbles are ejected from the nozzle 204 into the first treatment tank 1 and are dispersed in the treatment tank along with the movement of the water flow. Bacteria smaller than fine bubbles are adsorbed on the gas-liquid interface of fine bubbles and are exposed to chlorine dioxide to die. Further, for bacteria such as pathogens larger than fine bubbles, a large number of fine bubbles are adsorbed on the surface thereof, and decomposition proceeds by the oxidizing action of chlorine dioxide. By making fine bubbles in this way, the area of the gas-liquid interface becomes dramatically wider, and bacteria can be captured over a wide range and sterilized efficiently. Further, not only bacteria but also viruses are efficiently inactivated, and further, the decomposition treatment of the remaining chemicals, various toxic substances and the like progresses dramatically.

After the treatment with chlorine dioxide is completed for a certain period of time, ozone treatment is performed. During this ozone treatment, sterilization with chlorine dioxide also proceeds. The addition of ozone promotes the gasification of the bi-stabilized chlorine dioxide and promotes the bactericidal effect of chlorine dioxide.
That is, the opening / closing valve 75 of the transport passage 71 is opened and the circulation pump 73 is rotationally driven to circulate the wastewater between the first and second treatment tanks 1 and 2 through the transport passage 71 and the return passage 72. When the wastewater passes through the ejector 81, ozone is automatically sucked into the transport passage 71, and ozone flows into the second treatment tank 2 while being supplied to the wastewater. During the circulation, ozone is constantly supplied to the wastewater through the ejector 81. During this period, among the fine bubbles of chlorine dioxide, those with a relatively large diameter float and disappear, and those with a small diameter shrink and disappear, or become ultrafine bubbles and circulate while floating.
In the first treatment tank 1, the fine bubble generation device 200 continues to be driven. A part of the wastewater flowing from the second treatment tank 2 into the first treatment tank 1 passes through the fine bubble generation device 200. When passing through the fine bubble generator 200, ozone dissolved in the wastewater is generated as fine bubbles by cavitation and is ejected into the wastewater staying in the first treatment tank 1.
Similar to chlorine dioxide, bacteria smaller than fine bubbles are adsorbed on the gas-liquid interface of the fine bubbles and are killed by the oxidizing action of ozone. Further, for bacteria such as pathogens larger than fine bubbles, a large number of fine bubbles are adsorbed on the surface thereof, and decomposition proceeds by the oxidizing action of ozone. By making fine bubbles in this way, the area of the gas-liquid interface becomes dramatically wider, and bacteria can be captured over a wide range and sterilized efficiently. Regarding ozone, not only bacteria but also viruses are efficiently inactivated, and further, the decomposition treatment of residual chemicals, various toxic substances, etc. progresses dramatically. The action of ozone is sterilized by the oxidizing action of radical oxygen atoms separated in the gas state or the oxidizing action of OH radicals generated by oxygen atoms in water, and decomposition proceeds. Furthermore, the remaining chlorine dioxide is also finally decomposed.
After the operation for a predetermined time, wastewater is taken from the sampling passage 130, the water quality is inspected, and if it is within the inspection standard, the circulation pump 73 and the ozone supply device 8 are stopped.

The discharge switches the first and second switching valves 93 and 95 and drives the discharge pump 92. The wastewater remaining in the second treatment tank 2 is discharged through a part of the return passage 72 and the discharge path 91. The wastewater remaining in the first treatment tank 1 is discharged through two passages, one is discharged through the transport passage 71 and the second treatment tank 2, and the other is discharged through the return passage 72 and the discharge passage 91. .. The switching of the valves and the control of the pumps described above are automatically controlled by a control panel (not shown) provided in the electric room 104.
As described above, according to the present embodiment, chlorine dioxide is sterilized by generating fine bubbles such as fine bubbles and ultrafine bubbles in the pretreatment step, so that the ozone treatment equipment is not enlarged and wastewater is efficiently discharged. Can be processed. In particular, by using fine bubbles, the processing time can be shortened, the amount of chlorine dioxide and ozone required can be significantly reduced, and energy saving and cost reduction can be achieved.

Next, other reference embodiments of the present invention and embodiments of the present invention will be described. In the following description, the same components as those in the reference embodiment 1 are designated by the same reference numerals, and the description thereof will be omitted.
[ Reference form 2]
FIG. 2 shows an infectious waste treatment apparatus according to Reference Form 2 of the present invention.
In the above reference embodiment 1, ozone is supplied by the ejector 81, but instead of the ejector 81, a known ejector type fine bubble generator 300 is used. As the fine bubble generator 300, for example, the above-mentioned YJ nozzle (trade name of Envirovision Co., Ltd.) or the like can be used.
This fine bubble generation device 300 basically narrows a part of the passage of the nozzle body 302 in the same manner as the ejector 81, increases the flow velocity by the Venturi effect to reduce the pressure, and self-produces ozone gas from the intake port 304. Although it is sucked, a large number of exfoliation flows are generated in the portion where the passage is expanded, and the bubbles of ozone gas mixed in the waste water are miniaturized by the shearing action of the exfoliation flow.
In this way, ozone is supplied into the wastewater as fine bubbles and circulates between the first treatment tank 1 and the second treatment tank 2 to treat the wastewater. In this case, the fine bubble generation device 200 in the first treatment tank 1 may be stopped or may be driven. If it is driven, fine bubbles and ultrafine bubbles of ozone and chlorine dioxide are further generated from the dissolved waste liquid, and can be sterilized and decomposed more efficiently.
In the second embodiment, the second treatment tank 2 may be eliminated.

[ Reference form 3]
FIG. 3 shows an infectious waste treatment apparatus according to Reference Form 3 of the present invention.
In the third embodiment, the chlorine dioxide injection path 6 is connected to the intake port 206 provided on the side wall of the nozzle 204 of the fine bubble generator 200 submerged in the first treatment tank 1.
In this way, the flow velocity of the waste liquid sent into the nozzle 204 by the submersible pump 202 sharply increases at the throttle portion, and the pressure drop causes chlorine dioxide to be self-sucked into the nozzle 204 from the intake port 206 to be contained in the waste liquid. The bubbles are further sheared by the separation flow (vortex flow) of the flow passing through the throttle portion in the nozzle 204, and are atomized and injected into the first treatment tank 1 from the outlet of the nozzle 204. Will be done.
Although the stabilized aqueous solution of chlorine dioxide is injected from the injection path 6, it can be gasified by activation and the chlorine dioxide gas can be sucked from the intake port 307.
Further, the chlorine dioxide dissolved in the wastewater sent to the nozzle 204 by the submersible pump 202 also causes cavitation due to the sudden pressure drop generated in the wastewater flowing into the nozzle 204 and is dissolved in the wastewater, as in the first embodiment. The chlorine dioxide that had been generated is generated as fine bubbles.
In this way, the fine bubbles generated by the cavitation effect and the fine bubbles generated by the self-suctioned exfoliation flow of chlorine dioxide are synergistically generated, so that a larger amount of fine bubbles of chlorine dioxide are generated, and the first treatment is performed. It can be supplied to the wastewater of the tank 1.
The ozone treatment step is the same as that of the first embodiment.

[Embodiment 1 ]
FIG. 4 shows an infectious waste treatment apparatus according to the first embodiment of the present invention.
In the first embodiment, unlike the reference embodiment 1 , the fine bubble generation device is not provided in the first treatment tank 1.
The ozone fine bubble generator 300 and the chlorine dioxide fine bubble generator 400 are installed in the circulation path 70 connecting the first treatment tank 1 and the second treatment tank 2. Both of the fine bubble generators 300 and 400 are of the ejector type, and the ozone fine bubble generator 300 is arranged in the transport path 71 of the circulation path 70 in the same manner as in Reference Form 2, and the chlorine dioxide fine bubble generator 400 Is arranged in the return passage 72.
In the first embodiment, the second treatment tank for dissolving ozone is unnecessary, and the treatment tank 41 corresponding to the first treatment tank, the chlorine dioxide injection device 3, the wastewater supply device 5, and the wastewater D circulation device 7 are circulated. The ozone supply device 8 and the discharge device 9 as a discharge means are provided. Of these, the treatment tank 41, the chlorine dioxide injection device 3, the circulation device 7, and the ozone supply device 8 constitute the treatment unit 500.
The chlorine dioxide injection device 3 is provided with supply paths 62 and 63 for supplying chlorine dioxide to the temporary storage tank 55 and the screen unit 54. Further, the chlorine dioxide injection path 6 is connected to the intake port 404 of the chlorine dioxide fine bubble generator 400.
In the wastewater supply device 5, infectious wastewater discharged from an dissection room, surgery, or the like is stored in a temporary storage tank 55 via a screen unit 54. A blower 56 is provided in the temporary storage tank 55 to send air into the wastewater to stir it and promote decomposition by microorganisms. The exhaust gas from the temporary storage tank 55 is exhausted via the sterilization unit 57. The sterilization unit 57 sterilizes bacteria and the like floating in the exhaust gas leaking from the temporary storage tank 55. For example, an ozone lamp or the like that irradiates ultraviolet rays to generate ozone from oxygen in the air is used. Further, a supply path 53 for transporting the wastewater of the temporary storage tank 55 to the treatment tank 41 is provided, and the wastewater is transported to the treatment tank 41 by a pump (not shown).
The sterilization unit 57 is provided in the treatment unit 500, and the treatment unit 500 is provided with the sterilization unit 57 and the exhaust ozone decomposer 223 to exhaust the exhaust gas in the treatment unit 500.
The circulation device 7 has a circulation path 70 for returning the waste liquid from the outlet 16 of the treatment tank 41 to the return port 17 for circulation, a circulation pump 73 provided in the circulation path 70, and a strainer 74. The circulation passage 70 includes a transport passage 71 to the switching valve 97 located at a branch portion from the discharge passage 91, and a return passage 72 from the switching valve 97 to the return port 17 of the processing tank 41. The circulation pump 73 and the strainer 74 are provided in the transport passage 71.
The discharge device 9 is switched from the circulation path 70 to the discharge path 91 via the switching valve 97 and discharged, but is temporarily stored in the discharge tank 96. The illustration of the discharge pump 92 is omitted. Further, the drawing of the extraction passage 94 and the like connected to the second switching valve 95 is also omitted.

The ozone fine bubble generator 300 has a nozzle body 302 and an intake port 304 provided on the side wall of the nozzle body 302, and connects the inlet port and the outlet port of the nozzle body 302 to the piping constituting the transport passage 71. is doing. Further, the intake port 304 is connected to the ozone supply device 8 through the ozone supply path 82.
The chlorine dioxide fine bubble generator 400 has a nozzle body 402 and an intake port 404 provided on the side wall of the nozzle body 402, and the inlet port and the outlet port of the nozzle body 402 are connected to a pipe constituting the return passage 72. You are connected. Further, the intake port 404 is connected to the chlorine dioxide injection device 3 through the injection path 6.
The treatment apparatus of the first embodiment supplies a predetermined amount of wastewater from the temporary storage tank 55 to the treatment tank 41. After the supply, the circulation pump 73 is driven to circulate the wastewater through the transport passage 71 and the return passage 72. When the wastewater starts to circulate, ozone gas is self-sucked into the transport passage 71 through the fine bubble generator 300 to generate fine bubbles of ozone gas, and the fine bubbles of ozone gas are supplied to the wastewater. Further, chlorine dioxide is self-sucked into the return passage 72 through the fine bubble generator 400, and the fine bubbles of chlorine dioxide are supplied into the waste water and flow into the treatment tank 41, and the fine bubbles of chlorine dioxide gas and the fine bubbles of ozone gas are introduced. However, at the same time, it is supplied to the waste water and the treatment of the waste water proceeds.
In this way, by using the ejector type fine bubble generators 300 and 400, fine bubbles are generated by utilizing the supply pressure of the circulation pump, so that the second treatment mainly for ozone dissolution as in Reference Form 1 is performed. The tank 2 becomes unnecessary, and the processing unit 500 can be downsized.

Other Forms / Fine Bubble Generation Method In the above embodiment, the case where fine bubbles are generated by the Venturi method and the ejector method has been illustrated as an example, but other methods for generating fine bubbles include a swirling flow method and a static method. A mixer method, a micropore method, a pressure melting method, an ultrasonic cavitation method and the like are known, and various methods can be applied depending on the chlorine dioxide and ozone supply method and the equipment. For example, in the case of generating fine bubbles of chlorine dioxide dissolved in a liquid as in the above reference form, a method such as a pressure dissolution method or an ultrasonic cavitation method is adopted in addition to the Venturi method, and the gas is liquid. When sucking into the inside to generate fine bubbles, a swirling flow method, an ejector type, a static mixer method, a fine hole type, or the like can be adopted.
-Order of chlorine dioxide treatment and ozone treatment In addition, in the above-mentioned reference forms 1 to 3, a pretreatment step of performing only chlorine dioxide treatment is provided before the ozone treatment, but ozone treatment is performed before the chlorine dioxide treatment. You may go. Further, ozone treatment may be performed before and after chlorine dioxide treatment, or chlorine dioxide treatment and ozone treatment may be performed at the same time.
In the first embodiment , chlorine dioxide treatment and ozone treatment are performed at the same time , the waste water becomes acidic and the gasification of stabilized chlorine dioxide is promoted, and the chlorine dioxide gas and ozone gas bubbles are mixed in the waste water. It circulates in a gas-liquid two-phase configuration.
-Structure that does not use a fine bubble generator In each of the above reference forms, a fine bubble generator is installed in the processing device. For example, fine bubble water in which fine bubbles of chlorine dioxide are dispersed in water and fine bubbles of ozone are installed. If fine bubble water in which bubbles are dispersed in water is prepared, and fine bubble water of chlorine dioxide is supplied instead of chlorine dioxide, and fine bubble water of ozone is supplied instead of ozone, a fine bubble generator is unnecessary. For example, in FIG. 1, it is possible to store chlorine dioxide fine bubble water in the tank 31 of the chlorine dioxide injection device 3, store ozone fine bubbles instead of the ozone generator, and send them by the ejector 81. .. If it is an ultra valve with a size of less than 1 μm as fine bubbles, it can be stored for a long time. For the generation of this fine bubble water, one produced outside the equipment of the infectious waste treatment device can be used.

10 Treatment equipment 1 1st treatment tank, 2nd treatment tank 41 Treatment tank 3 Chlorine dioxide injection device 31 Tank, 32 Pump, 6 Injection path 5 Waste supply device 52 Drainage basin, 53 Supply path 7 Circulation device 70 Circulation path, 71 transport passage, 72 return passage, 73 circulation pump,
75 Valve 8 Ozone supply device 80 Ozone generator, 81 Ejector, 82 Ozone supply path 9 Discharge device 91 Discharge path, 92 Discharge pump, 93 1st discharge valve, 94 Extraction passage, 95 2nd discharge valve, 97 Switching valve 130 Sampling Passage 200 Fine bubble generator 300 Fine bubble generator 400 Fine bubble generator 400

Claims (1)

A treatment tank, a wastewater supply means for supplying wastewater containing infectious waste to the treatment tank, a circulation means for circulating the wastewater from the treatment tank through a circulation path and returning the wastewater to the treatment tank, and a treated wastewater are discharged. In an infectious waste treatment device equipped with a release means,
The circulation passage includes a transport passage from the outlet of the treatment tank to a branch portion with the discharge passage of the discharge means, and a return passage from the branch portion to the return port of the treatment tank.
The transport passage is provided with a fine bubble generating means for generating fine bubbles of ozone, and the return passage is provided with a fine bubble generating means for generating fine bubbles of chlorine dioxide.
A device for treating infectious waste, wherein the fine bubbles of chlorine dioxide and the fine bubbles of ozone are simultaneously supplied to the wastewater to proceed with the treatment of the wastewater .

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