JP6046342B2 - Infectious waste liquid treatment equipment - Google Patents

Description

  The present invention relates to an infectious waste liquid treatment apparatus and method that can be suitably implemented to inactivate infectious waste liquid containing infectious substances such as pathogenic bacteria and viruses.

  Inactivating pathogenic bacteria and viruses is very important for facilities handling infectious substances such as medical institutions. In particular, in medical institutions that handle infectious diseases, it is necessary to process the secretions and excretion from patients and carriers who suffer from diseases caused by viruses and pathogenic bacteria on a daily basis. It is also necessary to carry out treatment of somatic cells generated from the operation and examination of carriers and their processed products, cleaning liquids for examination equipment and medical equipment, and the like.

  In these processes, it is necessary to inactivate viruses and the like to the extent that the waste liquid is not infectious when discharged to the outside, but this process requires a large-scale device. Considering the operating cost, a very heavy burden is imposed.

  A typical prior art is described in Patent Document 1, for example. This prior art is a method characterized by pretreatment with a sterilizing and decomposing agent such as chlorine dioxide and then ozone treatment, and sterilizing the first treatment tank, the second treatment tank and the first treatment tank. Injection means for injecting the agent, waste liquid supply means for supplying waste liquid containing infectious waste to the first treatment tank, circulation means for circulating the waste liquid between the first treatment tank and the second treatment tank, ozone in the waste liquid to be circulated An infectious waste treatment apparatus including ozone supply means for supplying and discharge means for discharging treated waste liquid is disclosed.

  In addition, other methods for treating infectious waste liquid include, for example, a method using hydrogen peroxide and ozone (Patent Document 2), a method of treating pathogenic waste with high-concentration ozone (Patent Document 3), and the like. Are known.

JP 2004-24922 A JP 2001-00982 A JP 05-293167 A

  In the prior art disclosed in Patent Document 1 described above, pathogenic bacteria and viruses present in infectious waste while injecting a disinfectant into the first treatment tank and circulating a waste liquid containing infectious waste. In order to inactivate the water, two treatment tanks, a first treatment tank and a second treatment tank, are used. However, there is a problem that the configuration is large and complicated, and the site space in the medical institution must be sufficient. Can not be installed.

  In addition, in the invention described in Patent Document 2, although an example of treatment using actual Embalming waste liquid (dead body preservation treatment waste liquid) is described, what is described as an infectious microorganism is an effect on staphylococci However, there is a problem that it is not known whether pathogenic viruses have an inactivating effect.

  The invention described in Patent Document 3 is said to be able to completely sterilize Escherichia coli and hepatitis B virus. However, only Escherichia coli is described together with specific data, and high concentration ozone is used. Since it is used, a large-scale device for that purpose is required, and as a result, a site space for a medical institution is required as in Patent Document 1.

  The object of the present invention is to reduce the size and simplification of the configuration, and even when there is not enough land in a medical institution or the like, it can be installed with a reduced occupied area or occupied space, and infectious waste liquid is reduced in cost. It is an object of the present invention to provide an infectious waste liquid treatment apparatus which can be efficiently treated with the above.

The present invention includes a waste liquid tank for storing the infectious waste from pathogenic microorganisms have free, medical institutions or microorganism-associated facilities including pathogenic viruses,
A reaction tank in which waste liquid stored in the waste liquid storage tank is supplied, a chemical liquid containing ozone gas and chlorine dioxide is sequentially brought into contact with the supplied waste liquid, and pathogenic microorganisms in the waste liquid are inactivated,
A chemical storage tank for storing the chemical,
An ozone gas generation source for generating the ozone gas;
A chemical solution transporting means for supplying the chemical solution stored in the chemical solution storage tank to the reaction tank;
A waste liquid circulating means for circulating the waste liquid in the reaction tank while ozone gas is supplied from the ozone gas generation source,
The infectious waste liquid treatment apparatus includes a control means for controlling the supply amount of the chemical solution supplied from the chemical solution transporting means to the reaction tank and the supply amount of the ozone gas supplied from the waste liquid circulation means to the reaction tank in time series. And
Said control means, first by time supply the predetermined ozone gas from the waste liquid circulation means into the reaction vessel, by the ozone gas after being destroyed or damaged cell walls of pathogenic microorganisms, the ozone gas from the effluent circulation means to the reaction vessel the feed is stopped, after supplied second time the predetermined chemical liquid from the chemical transport means to the reaction vessel and allowed to supply a third time predetermined ozone gas from the waste liquid circulation means to the reaction vessel, stopping the supply of the ozone gas The infectious waste liquid treatment apparatus is characterized in that it can be set to an operation mode in which the supply pattern is repeated.
Further, the present invention includes a waste liquid tank for storing the infectious waste from pathogenic microorganisms have free, medical institutions or microorganism-associated facilities including pathogenic viruses,
A reaction tank in which waste liquid stored in the waste liquid storage tank is supplied, a chemical liquid containing ozone gas and chlorine dioxide is sequentially brought into contact with the supplied waste liquid, and pathogenic microorganisms in the waste liquid are inactivated,
A chemical storage tank for storing the chemical,
An ozone gas generation source for generating the ozone gas;
A chemical solution transporting means for supplying the chemical solution stored in the chemical solution storage tank to the reaction tank;
A waste liquid circulating means for circulating the waste liquid in the reaction tank while ozone gas is supplied from the ozone gas generation source,
The infectious waste liquid treatment apparatus includes a control means for controlling the supply amount of the chemical solution supplied from the chemical solution transporting means to the reaction tank and the supply amount of the ozone gas supplied from the waste liquid circulation means to the reaction tank in time series. And
In the state where ozone gas is continuously supplied from the waste liquid circulation means to the reaction tank, the control means destroys or damages the cell wall of pathogenic microorganisms after a predetermined fourth time has elapsed since the start of ozone gas supply. When is Ru, characterized in that after being supplied fifth time the predetermined chemical liquid from the chemical transport means to the reaction vessel, it is possible to set the operation mode to repeat the sixth supply pattern to the time stop defining a supply of the chemical pre It is a processing apparatus of infectious waste liquid.

  Moreover, the present invention is characterized in that the waste liquid circulation means has a discharge section for ejecting ozone gas generated by an ozone gas generation source from the side into the reaction tank.

The present invention has contains pathogenic microorganisms including pathogenic viruses, supplying the infectious waste into the reaction vessel from the waste liquid storage tank for storing the infectious waste from medical institutions or microorganism-associated facilities, then the infection The waste gas is circulated in a circulation path from the reaction tank to the reaction tank via a pipe, ozone gas is supplied to the reaction tank, and the cell walls of pathogenic microorganisms are destroyed or damaged by the ozone gas , and then contains chlorine dioxide. Supplying a chemical solution to the reaction tank, further supplying ozone gas to the reaction tank, and inactivating the pathogenic microorganisms in the waste liquid by contacting each with the waste liquid containing the pathogenic microorganisms in the circulation. A method for inactivating pathogenic microorganisms in a waste liquid.

The present invention has contains pathogenic microorganisms including pathogenic viruses to generate a swirling flow of the effluent from the medical institution or microorganism-associated facilities by ejecting from the reaction vessel side reaction vessel by the circulation, It is characterized by maintaining a swirling flow in the reaction vessel.

The present invention has contains pathogenic microorganisms including pathogenic viruses, while the effluent from the medical institution or microorganism-associated facilities is circulated by the circulation path, pathogenic microorganisms by the ozone gas continuously supplying ozone gas The cell wall is destroyed or damaged, and a chemical solution of chlorine dioxide is supplied during the continuous supply of the ozone gas.

According to the present invention, pathogenic microorganisms, including pathogenic viruses and containing not (hereinafter, sometimes referred to infectious microorganisms), infectious waste from medical institutions or microorganism-associated facilities (hereinafter referred to as infectious waste) the It has a waste liquid storage tank that stores, a reaction tank that inactivates infectious microorganisms in the waste liquid, a chemical liquid storage tank that stores chemical liquid, and an ozone gas generation source that generates ozone gas, and contains ozone gas and chlorine dioxide By including control means for controlling the supply amounts of the chemical solution and ozone gas in time series, infectious microorganisms can be inactivated reliably and safely even though the apparatus is small.

  In addition, since the scale of the equipment is small, it can be installed in places where there is little space or space that can be occupied as equipment for treating relatively small infectious microorganisms and infectious waste. Can be efficiently processed at low cost.

  Furthermore, since high-concentration ozone and chlorine dioxide are not used, special equipment such as a pressurized container is not required as in the past, and there are fewer by-products such as trihalomethane compared to treatment with hypochlorous acid. In addition, it has an advantage that the load on the environment is small.

  Furthermore, according to the present invention, infectious microorganisms can be inactivated by adding ozone gas, a chemical solution containing chlorine dioxide, and ozone gas in this order while circulating infectious waste liquid, so ozone and chlorine dioxide are used at a high concentration. Large-scale equipment and facilities as in the case are not required, and there are no by-products such as trihalomethane, which has a large environmental load. Therefore, it is easy to discharge the waste liquid into a general sewer after treatment.

  According to the present invention, the chemical liquid containing ozone gas and chlorine dioxide can be brought into contact with the waste liquid by the swirling flow to inactivate infectious microorganisms, so that a device for stirring is unnecessary and the device is made smaller. Can do. Further, since the circulation in the circulation path and the stirring / mixing by the swirling flow in the reaction tank are repeated, there is an advantage that ozone and the waste liquid can be mixed efficiently and inactivation can be performed in a shorter time.

  According to the present invention, since ozone is present in the waste liquid during the treatment, even if the waste liquid contains a large amount of dislodged substances and infectious microorganisms from patients suffering from diseases caused by infectious microorganisms, Can be consumed quickly, and inactivation of infectious microorganisms can be performed reliably.

1 is a system diagram showing an overall configuration of an infectious waste liquid treatment apparatus 1 according to an embodiment of the present invention. 3 is an enlarged system diagram of a reaction tank 5, a chemical solution storage tank 6, an ozone gas generation source 7, a chemical solution transporting means 8, and a waste liquid circulating means 9. FIG. FIG. 3 is a horizontal cross-sectional view as seen from a section line III-III in FIG. 2. It is the systematic diagram which expanded the waste liquid storage tank 3 and its vicinity. 2 is a block diagram showing an electrical configuration of a control device 10. FIG. It is a flowchart for demonstrating operation | movement of the control apparatus 10 set to the 1st operation mode. 6 is a timing chart for explaining operations of the chemical liquid transporting means 8 and the waste liquid circulating means 9 controlled by the control device 10 set in the first operation mode. It is a flowchart for demonstrating operation | movement of the control apparatus 10 set to the 2nd operation mode. 7 is a timing chart for explaining operations of the chemical liquid transporting means 8 and the waste liquid circulating means 9 controlled by the control device 10 set in the second operation mode.

  FIG. 1 is a system diagram showing the overall configuration of an infectious waste liquid treatment apparatus 1 according to an embodiment of the present invention. An infectious waste liquid treatment apparatus (hereinafter sometimes abbreviated as “treatment apparatus”) 1 according to this embodiment includes a waste liquid storage tank 3 for storing infectious waste liquid 2 containing infectious microorganisms, and a waste liquid storage tank 3. The waste liquid stored in the tank is supplied, the chemical liquid mainly composed of chlorine dioxide and ozone gas are brought into contact with the supplied waste liquid to inactivate infectious microorganisms in the waste liquid, and the chemical liquid for storing the chemical liquid The storage tank 6, the ozone gas generation source 7 that generates ozone gas, the chemical liquid transporting means 8 that supplies the chemical liquid stored in the chemical liquid storage tank 6 to the reaction tank 5, and the ozone gas generated by the ozone gas generation source 7 are supplied. The waste liquid circulation means 9 for circulating the waste liquid in the reaction tank 5, the supply amount of the chemical liquid supplied from the chemical liquid transport means 8 to the reaction tank 5, and the supply amount of ozone gas supplied from the ozone gas generation source 7 to the waste liquid circulation means 9 The And a controller 10 as control means for sequentially controlling. The control device 10 may be realized by a sequence control device or a computer.

  FIG. 2 is an enlarged system diagram of the reaction tank 5, the chemical liquid storage tank 6, the ozone gas generation source 7, the chemical liquid transport means 8, and the waste liquid circulation means 9. Referring also to FIG. 1, the reaction tank 5 has a storage space 12 for storing waste liquid, and is generally a hollow cylindrical reaction tank main body 13 and tap water guided through a cleaning liquid transport pipe 70. A water spray head 14 for spraying water from above into the storage space 12 in the reaction tank main body 13 as a cleaning liquid, and an ozone gas generation source 7 in the storage space 12 from a portion near the bottom 16 of the side wall 15 of the reaction tank main body 13. Equivalent to the vertical height from the bottom 16 to the liquid surface 18 of the waste liquid stored in the storage space 12 and the injection nozzle 17 as a discharge part for injecting ozone gas mixed waste liquid supplied with ozone gas from the waste liquid circulation means 9 And a liquid level detector FS1 for detecting the liquid level H1 to be detected. The liquid level detector FS1 is realized by, for example, a float type level switch.

  The chemical solution storage tank 6 has a storage space 20 for storing a chemical solution, and is generally a hollow rectangular parallelepiped storage tank body 21 and a vertical from the bottom portion 22 of the chemical solution stored in the storage space 20 to the liquid surface 23. And a liquid level detector FS2 for detecting a liquid level H2 corresponding to the height. The liquid level detector FS2 is realized by, for example, a float type level switch.

  The chemical liquid transporting means 8 has one end connected to two chemical liquid supply pumps 24a and 24b for pumping the chemical liquid stored in the storage tank body 21 of the chemical liquid storage tank 6, and an output port of one chemical liquid supply pump 24a. A first chemical solution transport pipe 25 whose other end is connected to the reaction tank main body 15, and one end connected to the output port of the other chemical supply pump 24 b, and the other end connected to the raw water storage tank 3. And a chemical transport pipe 26.

  A check valve V <b> 1 is interposed in the first chemical transport pipe 25 in order to prevent a back flow of the chemical in the pipe. In addition, the second chemical transport pipe 26 separates the raw water into the main pipe 27 that guides the raw liquid waste water to the vicinity of the raw water storage tank 3 and the two storage spaces 29 a and 29 b partitioned by the partition wall 28 in the raw water storage tank 3. In order to guide, it has two branch pipes 30a and 30b branched from the main pipe 27. Gate valves V2a and V2b are interposed in the branch pipes 30a and 30b, respectively.

  The waste liquid circulation means 9 includes first to fifth gate valves V11; V12; V13a, V13b; V14a, V14b; V15, first to sixth transport pipes 31; 32; 33; 34a, 34b; 1 and second flexible fittings J1a, J1b; J2a, J2b, check valves V16a, V16b, first and second bypass pipes 38, 39, ozone gas supply pipe 40, open / close operation valves V19a, 19b, pressure detector PG1a, PG1b, pressure guiding pipes 41a and 41b, a three-way valve V25, and circulation pumps 45a and 45b are included. The ozone gas supply pipe 40 includes a main pipe 42 and branch pipes 43 a and 43 b that are branched and connected to the main pipe 42.

  In the present embodiment, the first to fourth gate valves V11; V12; V13a, V13b; V14a, V14b are realized by manually operated valves, and the fifth gate valve V15 is realized by, for example, an electric valve. In another embodiment of the invention, all of the first to fifth gate valves V11; V12; V13a, V13b; V14a, V14b; V15 may be realized by an electric valve or may be realized by a manually operated valve. In addition, a manual operation valve and an electric valve may be selectively used according to the switching frequency of the opening / closing operation.

  One end of the first transport pipe 31 is connected to the vicinity of the bottom of the side wall of the reaction tank 15, and the other end is connected to the second transport pipe 32. The second transport pipe 32 has one end connected to the normally closed first gate valve V11 and the other end connected to one flexible pipe joint J1a. A second gate valve V12, a fifth gate valve V15, a strainer S1, and one third gate valve V13a are interposed in the second transport pipe 32. One flexible pipe joint J1a is connected to one end of a third transport pipe 33, and the other end of the third transport pipe 33 is connected to an input port of one circulation pump 45a. One end of one fourth transport pipe 34a is connected to the output port of one circulation pump 45a, and the other end of the fourth transport pipe 34a is connected to the fifth transport pipe 35.

  One branch pipe 43 a of an ozone gas supply pipe 40 that guides ozone gas from the ozone gas generation source 7 is connected to the third transport pipe 33. One end of the first bypass pipe 38 is connected between the strainer S1 of the second transport pipe 32 and the third gate valve V13a, and the other end of the first bypass pipe 38 is the other first flexible pipe. Connected to the joint J1b and the third gate valve V13b. One end of the second bypass pipe 39 is connected to the other first flexible pipe joint J1b, and the other end of the second bypass pipe 39 is connected to the input port of the other circulation pump 45b.

The third transport pipe 39 is connected to the other branch pipe 43b of the ozone gas supply pipe 40,
The other end of the branch pipe 43b is connected between the first flexible pipe joint J1b of the second bypass pipe 39 and the input port of the circulation pump 45b.

  One end of the other fourth transport pipe 34b is connected to the output port of the other circulation pump 45b, and the other end of the other fourth transport pipe 34b is connected to the fifth transport pipe 35. The pressure detector PG1b is connected to the other fourth transport pipe 34b by the other pressure guiding pipe 41b. In addition, a pressure detector PG1a is connected to the one fourth transport pipe 34a by one pressure guide pipe 41a. On / off valves V19a and V19b are interposed in the pressure guiding tubes 41a and 41b, respectively.

  One fourth transport pipe 34a includes one flexible pipe joint J2a, a check valve V16a, and a first valve between the connection position of the one pressure guide pipe 41a and the other end connected to the fifth transport pipe 35. A four gate valve V14a is interposed. The other fourth transport pipe 34b includes the other flexible pipe joint J2b and the check valve V16b between the connection position of the other pressure guiding pipe 41b and the other end connected to the fifth transport pipe 35. And the 4th gate valve V14b is interposed.

  The other end of the fifth transport pipe 35 is connected to the input port of the three-way valve V25. One end of the sixth transport pipe 36 is connected to one output port of the three-way valve V25, and one end of the seventh transport pipe 37 is connected to the other output port of the three-way valve V25.

  FIG. 3 is a horizontal cross-sectional view taken along the section line III-III in FIG. The waste liquid circulation means 9 has an injection nozzle 17 for injecting waste liquid mixed with ozone gas generated by the ozone gas generation source 7 from the side into the reaction tank body 13. The injection nozzle 17 is disposed on an imaginary plane perpendicular to the substantially vertical axis L1 of the reaction tank body 13 on an axis L3 perpendicular to the one radius line L2 centered on the axis L1 and close to the peripheral wall. The In the present embodiment, the reaction vessel main body 13 is formed of a hollow cylindrical body, but may be formed of other forms, for example, a hollow rectangular parallelepiped.

  FIG. 4 is an enlarged system diagram of the waste liquid storage tank 3 and its vicinity. The waste liquid storage tank 3 is installed on a substantially horizontal installation surface 50 on the ground, and is stored in a storage tank body 51 in which two storage spaces 29a and 29b are formed by the partition wall 28, and in each of the storage spaces 29a and 29b. Two liquid level detectors FS3a and FS3b that detect liquid levels H3a and H3b corresponding to the vertical height from the bottom 52 of the raw water to the liquid levels 53a and 53b, respectively, and in the vicinity of the bottom 52 in each of the storage spaces 29a and 29b. It includes two bubbling heads 54a and 54b that are arranged and release bubbles for stirring the raw water stored in the storage spaces 29a and 29b. Each of the liquid level detectors FS3a, FS3b is realized by, for example, a float type level switch.

  One end of a pair of first exhaust pipes 60a and 60b that guides the gas generated from the waste liquid stored in the storage spaces 29a and 29b to the outside is connected to the top wall of the storage tank main body 51. The other ends of the exhaust pipes 60 a and 60 b are connected to the second exhaust pipe 61. A filter HP and an exhaust fan F are interposed in the second exhaust pipe 61, foreign matter in the exhaust is removed by the filter HP, and the exhaust gas from which the foreign matter has been removed is forcibly exhausted by the exhaust fan F. The filter HP is realized by a hepa filter, for example.

  FIG. 5 is a block diagram showing an electrical configuration of the control device 10. The controller 10 supplies ozone gas from the waste liquid circulation means 9 to the reaction tank 5 for a predetermined first time W11, and then stops supply of ozone gas from the waste liquid circulation means 9 to the reaction tank 5 to supply the chemical liquid transport means 8. After the chemical solution is supplied from the chemical solution transporting means 8 to the reaction tank 5, the ozone gas is supplied from the chemical solution circulation means 9 to the reaction tank 5 in advance. After supplying W13 for 3 hours, ozone gas is continuously supplied from the waste liquid circulation means 9 to the reaction tank 5 in the first operation mode in which the supply pattern for stopping the supply of ozone gas from the waste liquid circulation means 9 to the reaction tank 5 is repeated. When a predetermined fourth time W21 has elapsed since the start of ozone gas supply, the chemical liquid is supplied from the chemical transport means 8 to the reaction tank 5 for a predetermined fifth time W22, and then the chemical liquid is supplied. And a second operation mode for repeating the sixth hour W23 supply pattern to stop defining a feed advance, selectively settable configured by the input means 55.

The control means 10 is supplied with liquid level detection signals SH1, SH2; SH3a, SH3b representing the liquid levels from the respective liquid level detectors FS1, FS2; FS3a, FS3b, and these liquid level detection signals SH1, SH2, SH3a, In response to SH3b, each circulation pump 45a, 45b; ozone gas generation source 7; each chemical supply pump 24a, 24b; three-way valve V25; fifth gate valve V15; control signal for controlling the operation of each raw water pump P10, P20 And a control unit 56 for outputting. The input means 55 is realized by any one or a plurality of types such as a touch panel, a keyboard, and a menu button displayed as an image on the display device. The control unit 56 may be realized by a central processing unit (abbreviated as CPU) or may be realized by a PLC (Programmable Logic Controller).

  FIG. 6 is a flowchart for explaining the operation of the control device 10 set to the first operation mode, and FIG. 7 is a chemical solution transport means 8 and waste liquid circulation controlled by the control device 10 set to the first operation mode. 10 is a timing chart for explaining the operation of means 9; In step a0, the waste liquid treatment operation is started, and the operator selects either the first operation mode or the second operation mode, and inputs the selected operation mode by the input means 55. In the present embodiment, the case where the first operation mode is selected and the case where the second operation mode is selected will be described.

  When the first operation mode is selected by the input operation of the input unit 55 by the operator, a mode selection signal of the first operation mode is input from the input unit 55 to the control unit 56, and the control unit 56 is set to the first operation mode. Is done.

  In step a1, the control unit 56 set in the first operation mode determines whether or not the liquid level H3a of the waste liquid in the storage tank main body 51 detected by the liquid level detector FS3a has reached a liquid level that can be pumped. If it is determined that it has reached the liquid level that can be pumped up, the process proceeds to step a2, where the control unit 56 drives the raw water pump P20 to start the pumping operation, and one storage space 29a of the storage tank main body 51 is started. The waste liquid is supplied into the reaction tank main body 13 through the waste liquid transport pipes 58 and 59.

  When the liquid level H1 of the waste liquid in the reaction tank main body 13 is detected by the liquid level detector FS1, and it is determined that the control unit 56 has reached the pumping stop liquid level in step a3, in step a4, the control unit 56 At t11, the waste liquid circulating means 9 is operated to circulate the waste liquid, and the supply of ozone gas from the ozone gas generation source 7 to the ozone gas supply pipe 40 is started to circulate the ozone gas mixed waste liquid, thus supplying the ozone gas to the reaction tank 5.

When the control unit 56 determines that the first time W11 has elapsed from time t11 in step a5, the process proceeds to step a6, and at time t12, the control unit 56 drives one chemical solution supply pump 24a to store the chemical solution storage tank. 6 through the first chemical liquid transport pipe 25, the chemical liquid is supplied into the reaction tank main body 13, and the waste liquid is circulated by the waste liquid circulation means 9 in step a7. Supply of ozone gas to the tank 5 is stopped.

  When the second time W12 has elapsed from time t12 in step a8, the supply of ozone gas from the ozone gas generation source 7 to the waste liquid circulation means 9 is resumed in step a9 to supply ozone gas to the reaction tank 5, and in step a9, When the third time period W13 elapses from t13, the process proceeds to step a10, and the three-way valve V25 is connected to the fifth transport pipe 35 and the seventh transport pipe 37 from the connection position connecting the fifth transport pipe 35 and the sixth transport pipe 36. Is switched to a connection position for connecting the reaction vessel main body 13 and the waste liquid circulating means 9 and the waste liquid after treatment existing in the system is discharged from the seventh transport pipe 37 to an external waste water facility. V25 is switched from the connection position connecting the fifth transport pipe 35 and the seventh transport pipe 37 to the connection position connecting the fifth transport pipe 25 and the sixth transport pipe 36 and returned.

  Next, in step a11, the control unit 56 reaches the liquid level at which the liquid level H3b in the other storage space 29b of the storage tank body 51 can be pumped by the detection signal from the other liquid level detector FS3b. If not reached, the steps a1 to a10 are executed. If not, the circulation pumps 45a and 45b, the ozone gas generation source 7, the chemical supply pump 24a and the raw water are supplied in step a12. The pumps P10 and P20 are stopped, and the waste liquid treatment operation is finished.

  FIG. 8 is a flow chart for explaining the operation of the control device 10 set in the second operation mode, and FIG. 9 shows the chemical solution transport means 8 and the waste liquid circulation controlled by the control device 10 set in the second operation mode. 10 is a timing chart for explaining the operation of means 9; When the waste liquid processing operation is started in step b0 and the second operation mode is selected by the input operation of the input unit 55 by the operator, the mode selection signal of the second operation mode is input to the control unit 56 from the input unit 55. The control unit 56 is set to the second operation mode.

  In step b1, the control unit 56 set in the second operation mode determines whether or not the liquid level H3a of the waste liquid in the storage tank main body 51 detected by the liquid level detector FS3a has reached a liquid level that can be pumped. When it is determined that the liquid level that can be pumped has been reached, the process proceeds to step b2, where the control unit 56 drives the raw water pump P20 to start the pumping operation, and stores one of the storage tank main bodies 51. Waste liquid in the space 29 a is supplied into the reaction tank main body 13 through the waste liquid transport pipes 58 and 59.

  When the liquid level H1 of the waste liquid in the reaction tank body 13 is detected by the liquid level detector FS1, and it is determined that the control unit 56 has reached the pumping stop liquid level in step b3, in step b4, the control unit 56 At t21, the waste liquid circulating means 9 is operated to circulate the waste liquid, and the supply of ozone gas from the ozone gas generation source 7 to the ozone gas supply pipe 40 is started to circulate the ozone gas mixed waste liquid, and thus the ozone gas is supplied to the reaction tank 5 as described later. The supply is continued until the sixth time W23 elapses at b8.

  When the control unit 56 determines in step b5 that the predetermined fourth time W21 has elapsed from time t21, the process proceeds to step b6 at time t22, and the control unit 56 drives one chemical solution supply pump 24a to store the chemical solution. The chemical liquid is supplied from the tank 6 through the first chemical liquid transport pipe 25 into the reaction tank main body 13, and ozone and the chemical liquid are stirred and mixed in the waste liquid by circulation by the waste liquid circulation means 9. When the fifth time W22 has elapsed from time t22 in step b7, the supply of the chemical solution by the chemical solution transport means 8 is stopped in step b8. In step b9, when the sixth time W23 elapses from time t23, the process proceeds to step b10, and the three-way valve V25 is connected to the fifth transport pipe 35 from the connection position connecting the fifth transport pipe 35 and the sixth transport pipe 36. Switching to the connection position connected to the seventh transport pipe 37, the treated waste liquid existing in the system of the reaction tank body 13 and the waste liquid circulation means 9 is discharged from the seventh transport pipe 37 to the external waste water facility, and the discharge is completed. Then, the three-way valve V25 is returned by switching the connection position connecting the fifth transport pipe 35 and the sixth transport pipe 6 from the connection position connecting the fifth transport pipe 35 and the seventh transport pipe 7.

  Next, in step b11, the control unit 56 reaches a liquid level at which the liquid level H3b in the other storage space 29b of the storage tank body 51 can be pumped by a detection signal from the other liquid level detector FS3b. If not reached, the steps b1 to b10 are performed. If not, the circulation pumps 45a and 45b, the ozone gas generation source 7, the chemical circulation pump 24a, The raw water pumps P10 and P20 are stopped, and the waste liquid treatment operation is finished.

  Examples of the infectious waste liquid containing infectious microorganisms include aqueous solutions or waste liquids containing infectious microorganisms. Specifically, for example, waste liquids containing viruses and organic substances used on a laboratory scale or relatively small scale. In addition, waste liquids from microorganism-related facilities and medical institutions, particularly medical institutions and facilities that target infectious diseases.

  These waste liquids can inactivate the microorganisms even if they contain components other than the infectious microorganisms that are the subject of the present invention, and even if the waste liquid contains only infectious microorganisms, Microorganisms can be inactivated.

  Although it is not clear about the mechanism of action of the present invention, the active oxygen by the first active oxygen donor destroys or damages the cell wall of the pathogenic microorganism, and chlorine dioxide tends to penetrate deeper into the pathogenic microorganism. It is presumed to be.

  Examples of infectious microorganisms according to embodiments of the present invention include pathogenic bacteria or viruses that have the ability to infect humans, livestock, and poultry as hosts, and have the ability to cause disease.

  Such pathogenic bacteria include, for example, Mycobacterium tuberculosis, Vibrio cholerae, Syphilis treponema, Neisseria gonorrhoeae, Shigella, fulminant hemolytic streptococci, Salmonella typhi, Paratyphi, Neonococcus, Rhinococcus, Anthrax, Meningitis Fungus, tetanus, streptococci, idiopathic epilepsy, pertussis, pneumococci, pneumococci, staphylococcus aureus, epidermidis epidermidis, diphtheria, methicillin-resistant Staphylococcus aureus, drug-resistant Pseudomonas aeruginosa, enterotoxigenic Escherichia coli, intestinal tract Pathogenic Escherichia coli such as hemorrhagic Escherichia coli, verotoxin-producing Escherichia coli, plague, wild gourd, brucella, botulinum, legionella, recurrent thermophile, parrot disease chlamydia, lyme disease, bacteria such as Q fever rickettsia, coccidioides It also has an inactivating effect on fungal fungi, malaria parasites, cryptosporidium parasites and the like.

  In addition, the virus is effective for viruses having different virus structures such as influenza virus (RNA type with envelope), herpes virus (DNA type with envelope), feline calicivirus (RNA type with no envelope).

  Examples of such viruses include types 1, 2, 4, and 5 as stipulated in “Act on Prevention of Infectious Diseases and Medical Care for Patients with Infectious Diseases” (Act No. 114 of October 2, 1998). Infectious diseases include viruses such as Ebola virus, Crimea congo virus, variola virus, Junin virus, Sabia virus, Ganarit virus or Machupo virus, Marburg virus, Lassa virus, etc. Poliovirus, SAR coronavirus, two types of infectious disease viruses such as H5N1 virus, HEV virus, West Nile virus, HAV virus, yellow fever virus, omsk virus, casa null forest disease virus, rabies virus, simian virus, hantavirus, western Equine encephalitis virus, tick-borne encephalitis virus Four types of infectious disease viruses such as dengue virus, eastern equine encephalitis virus, avian influenza (except H5N1) virus, Nipah virus, Japanese encephalitis virus, hantavirus, B virus, Venezuelan equine encephalitis virus, Hendra virus, Lissa virus, Rift Valley fever virus Furthermore, hepatitis (excluding E and A) viruses (B, C and other hepatitis viruses), acute encephalitis virus, rubella virus, measles virus and the like, can be mentioned five types of infectious disease viruses.

  Infectious disease-causing viruses other than the above, such as human immunodeficiency virus, seasonal influenza other than highly pathogenic influenza, herpangina, varicella / herpes virus, cytoromovirus, herpes simplex virus, herpes simplex virus, aseptic Viruses such as enteroviruses, echoviruses, and coxsackieviruses that cause congenital meningitis can also be inactivated.

  According to the embodiment of the present invention, even if the virus of interest is a virus having an envelope such as human immunodeficiency, hepatitis B, hepatitis C, rubella, HSV, influenza, vaccinia, etc. , Polio, coxsackie, echo, rhino, hepatitis A, bovine rota and other viruses that do not have an envelope can be inactivated, and inactive whether the virus is an RNA virus or a DNA virus Can be

  Furthermore, as viruses that infect and develop livestock and poultry, for example, among the above viruses, those that are transmitted and developed in livestock and poultry, such as avian influenza and swine influenza as well as cattle, horses, etc. In addition to various coronaviruses that cause respiratory diseases and infectious diarrhea by infecting pigs, birds, etc., bovine viral diarrhea virus, bovine herpes virus, bovine leukemia virus, Newcastle disease virus, foot-and-mouth disease virus, and the like.

  Furthermore, in an embodiment of the present invention, the infectious waste liquid to be treated may contain a substance released from a carrier of the infectious microorganism or the like, or livestock, poultry, and pets. And tissues constituting humans such as hair, nails, skin, organs and muscles, cells or components, body fluids such as blood and lymph, and excrement such as feces.

  In addition, examples of the detached material from livestock and poultry include various tissues such as hair, muscles, organs, blood, and excrement such as feces.

  Furthermore, the infectious waste liquid in the embodiment of the present invention includes an aqueous solution or infectious waste liquid containing viruses and organic substances. Specifically, for example, viruses and organic substances used on a laboratory scale or a relatively small scale are used. In addition to waste liquids, waste liquids from microbial-related facilities and medical institutions, particularly medical institutions and facilities that target infectious diseases can be mentioned.

  Next, as shown in steps a1 and b1, when the amount of infectious waste liquid introduced into the waste liquid storage tank 3 reaches a certain liquid level H3 in the waste liquid storage tank 3, the raw water pumps P10 and P20 are controlled by the control device. 10, the raw liquid waste water is supplied to the reaction tank 5.

  When the waste liquid is stored in the waste liquid storage tank 3, the waste liquid contains proteins, salts, and other nutrient sources suitable for the growth of various microorganisms, fungi, and algae. When the operation interval of the mechanical device is long, various microorganisms, fungi and algae grow. In the present invention, there is provided means for spraying the control chemical from the chemical storage tank 6 to the waste liquid storage tank 3, but separately supplying or spraying the control chemical for suppressing the growth and increase of these microorganisms to the storage tank. Means for doing so may be provided in the storage tank.

  An example of such a control agent is chlorine dioxide. In addition, as a control agent, it does not impair the action of ozone and chlorine dioxide to inactivate infectious microorganisms against the infectious microorganisms, and hinders the growth of microorganisms that grow in the waste liquid. Anything may be used.

  After the waste liquid is supplied to the reaction tank 5, ozone gas is supplied from the ozone generation source 7 to the waste liquid circulation means 9 for circulating the waste liquid stored in the reaction tank 5, as shown in steps a4 and b4.

  As the ozone gas generation source 7, an ozone generator widely used in this technical field can be used, and examples of such a generator include an ozone gas generator PZH series manufactured by Coflock.

  The ozone supplied to the reaction tank 5 may be supplied so that the concentration in the waste liquid is 0.5 to 20 ppm, preferably 0.5 to 10 ppm, and most preferably 1 to 5 ppm. .

  If ozone becomes the said density | concentration, you may supply continuously and may supply intermittently. Furthermore, the concentration during ozone supply can be changed within the above range, and intermittent supply and concentration change may be combined.

  For example, in the case of the first operation mode of the present invention, the ozone concentrations at the first time W11 and the third time W13 may be made different, and ozone at either time may be intermittently supplied. .

  In the waste liquid treatment with ozone, waste liquid is supplied to the reaction tank 5 through the waste liquid transport pipes 58 and 59 in both the first operation mode and the second operation mode, and ozone is supplied from the ozone generation source 7 to the reaction tank 5. Start by feeding.

  Next, as shown in steps a4 and b4, the waste liquid and the ozone gas are circulated through the first transport pipe 31 to the fifth transport pipe 35, the three-way valve V25, and the sixth transport pipe 36 (hereinafter referred to as a circulation path). Can be carried out by circulating through the circulation pump 45a or 45b.

  At this time, in the reaction tank 5, the discharge pressure may be set so that a flow in which the waste liquid is sufficiently mixed with the ozone gas in the tank, for example, a bubble flow, an overflow, a swirl flow, etc. is generated. The discharge pressure is preferably set so as to occur. While maintaining the swirling flow, it is preferable to open the drain pipe at the bottom and control the discharge pressure and the circulation pump pressure so that the waste liquid and ozone circulate in contact with each other in the circulation path.

  The swirling flow can be generated and maintained by controlling the discharge pressure of the waste liquid into the reaction tank 5. The discharge pressure varies depending on the capacity and shape of the reaction tank 5, but is generally 0.15 to 0.5 MPa, preferably 0.15 to 0.3 MPa. The circulation pump pressure may be controlled to be a pressure at which the waste liquid is discharged into the reaction tank 5 by the discharge pressure.

  Further, the circulation of the waste liquid may be started before supplying ozone gas to the waste liquid, and ozone may be supplied while circulating the waste liquid.

  The circulation speed in the circulation path may be about 50 to 500 liters / minute, preferably about 100 to 250 liters / minute.

  Although the ozone treatment time varies depending on the amount of waste liquid, the type and concentration of infectious microorganisms contained in the waste liquid, or the concentration of organic matter in the waste liquid, it may be about several tens of minutes to about 1 hour. The time 1 and the third time may be determined within this range.

  In the first operation mode, chlorine dioxide at the second time is transferred from the chemical liquid storage tank 6 to the reaction tank 5 via the chemical liquid transporting means 8 to the waste liquid in the reaction tank 5 after the ozone treatment at the first time. It can be carried out by supplying the contained chemical solution and bringing the waste solution into contact with chlorine dioxide.

  The chemical solution containing chlorine dioxide may be supplied after stopping the circulation of the waste liquid through the circulation path after finishing the ozone treatment, or when the ozone treatment is finished while continuing the circulation of the waste liquid, You may supply.

Chlorine dioxide (ClO ₂ ) is not only chlorine dioxide produced by dissolving acid in chloric acid, but also stabilized chlorine dioxide that can be stored by dissolving chlorine dioxide in alkaline aqueous solution or aqueous solution. Can do.

  In the embodiment of the present invention, it is preferable to use stabilized chlorine dioxide which is excellent in terms of ease of handling and safety, and chlorine dioxide can be used as it is or in a suitable medium.

  The amount of chlorine dioxide used may be added so that the concentration in the waste liquid is 5 to 1000 ppm, preferably 5 to 600 ppm, particularly preferably 5 to 200 ppm.

  Chlorine dioxide treatment can be carried out by a circulation system that returns from the reaction tank 5 to the reaction tank 5 through a circulation path in the same manner as the ozone treatment, and the amount of time required for the treatment is the amount of waste liquid and infection contained in the waste liquid. Depending on the type and concentration of the sex microorganisms or the concentration of organic matter in the waste liquid, it may be carried out for about several minutes to 1 hour.

  Further, when the treatment of the waste liquid with chlorine dioxide is completed, in the first operation mode, as shown in step a8, ozone gas is supplied into the waste liquid and the ozone treatment for the third time is performed.

  The ozone treatment in step a8 can be performed in exactly the same manner as the first ozone treatment in step a4 in terms of ozone supply method, ozone concentration, ozone treatment time, and the like.

  In the case of the first operation mode, the ozone treatment at the first time W11, the chlorine dioxide treatment at the second time W12, and the ozone treatment at the third time W13 may start the next time immediately after each treatment, Further, the next process can be performed with a certain time interval after each process. Alternatively, the next process may be started immediately before the end of each process, and each process may be repeated for a short time.

  Thus, since infectious microorganisms in the infectious waste liquid are inactivated, the first transport pipe 31 to the fifth transport pipe 35 and the three-way valve V25 are discharged through the seventh transport pipe 37 as described above. Can do.

  In another embodiment of the present invention, waste liquid is supplied to the reaction tank 5, ozone gas is supplied to the reaction tank 5 and circulated through the circulation path, while the waste liquid and ozone gas are brought into contact with each other, while the supply of ozone gas is continued. It is good also as a 2nd operation mode which supplies chlorine dioxide at a proper time, and also supplies ozone gas.

  That is, in the second operation mode, after supplying the waste liquid from the waste liquid storage tank 3 to the reaction tank 5, ozone gas is discharged from the side of the reaction tank 5 from the ozone gas generation source 7 so that the ozone gas maintains a predetermined concentration. The object of the present invention is to supply chlorine dioxide after a certain period of time while circulating the ozone gas and waste liquid through the circulation path, and to continue supplying the ozone gas after a certain period of time. Can be achieved.

  The ozone and chlorine dioxide at this time can be supplied continuously or intermittently as in the first operation mode, and the concentration in the waste liquid may be supplied so as to be a constant concentration. May be supplied.

[Experiment 1]
As viruses to be inactivated in the embodiment of the present invention, three types of viruses were used: influenza virus, human herpes simplex virus, and feline calicivirus (a substitute virus for rotavirus).

  After aeration of ozone in distilled water containing 1% FBS (fetal bovine serum) as an organic substance so as to maintain the concentration of 2 ppm, a chemical solution of stabilized chlorine dioxide is added to 10 ppm, and ozone is further 2 ppm. In this way, treated water aerated with ozone gas was added to the virus-containing solution, and allowed to stand for 30 minutes, and then the infectivity of the virus was measured.

At this time, the infectivity titers of the viruses used were 1.1 × 10 ⁷ PFU / ml for influenza virus, 2.6 × 10 ⁶ PFU / ml for human herpes simplex virus, and 4.2 × 10 ⁶ PFU / ml for feline calicivirus. ml.

  In addition, the virus infectivity titer measured the plaque infectivity titer as follows using each cell.

[Measurement of plaque infection titer]
<Virus>
The influenza virus PR8 strain was inoculated into the chorioallantoic cavity of a chicken fertilized egg (10-day egg), cultured for 2 days, and then chorioallantoic fluid was collected and centrifuged at 3,000 rpm for 10 minutes at 4 ° C. % And 60% sucrose, and centrifuged at 25,000 rpm for 90 minutes to purify the virus. As the human herpes simplex virus type I strain (HSV), the supernatant grown in Vero cells was used. For feline calicivirus F9 strain (FCV), the supernatant grown in CRFK cells was used.

<Cell>
Human colon cancer-derived CaCo2 cells were used as cells for measuring the infectious titer of influenza virus. Cat kidney-derived CRFK cells were used as cells for measuring the infectious titer of feline calicivirus. Green monkey kidney-derived Vero cells were used as cells for measuring HSV infectivity.

<Chlorine dioxide test>
Stabilized chlorine dioxide (50,000 ppm) was diluted with sterile distilled water to a final dilution concentration of 100 ppm. 10 μL of the virus stock solution was added to 990 μL of an aqueous solution having an effective chlorine concentration of 10 ppm, followed by treatment at room temperature for 1 to 60 minutes. After the treatment time had elapsed, 10 μL of 10% (W / V) sodium thiosulfate was added to stop the reaction, and the virus was diluted with serum-free DMEM and 0.1 mL each was inoculated into each sensitive cell in 37 wells. Adsorption was carried out at 60 ° C. for 60 minutes. After adsorption, a culture solution containing 0.8% agarose gel or methylcellulose was added and cultured for 48 to 96 hours. After culturing for 48 to 96 hours, virus cells were fixed with methanol or 10% formalin, 20% ethanol solution containing 0.1% crystal violet was added, plaques were calculated, and infectivity titer was calculated.

<Virucidal effect of stabilized chlorine dioxide in the presence of ozone>
50 μL of 200 ppm stabilized chlorine dioxide was added to 10 μL of virus, and 940 μL of ozone water aerated with ozone was added to a concentration of 2.2 ppm, followed by treatment for 1 to 5 minutes. After the treatment time had elapsed, 10 μL of 10% (W / V) sodium thiosulfate was added to stop the reaction, and the virus was diluted with serum-free DMEM and 0.1 mL each was inoculated into each sensitive cell in 37 wells. Adsorption was carried out at 60 ° C. for 60 minutes. After adsorption, a culture solution containing 0.8% agarose gel or methylcellulose was added and cultured for 48 to 96 hours. After culturing for 48 to 96 hours, virus cells were fixed with methanol or 10% formalin, 20% ethanol solution containing 0.1% crystal violet was added, plaques were calculated, and infectivity titer was calculated.

<Result>
The results are as shown in Table 1 below.

As is apparent from Table 1 above, it is clear that the influenza virus and HSV have an infectious titer of 5 PFU / ml or less, the infectious titer cannot be detected, and the virus is inactivated 100%. The infectious titer of FCV was 16 PFU / ml, which was 99.999% lower than the infectious titer before inactivation (4.2 × 10 ⁶ ). The experiment of Example 1 was conducted at Kitasato University School of Medical Hygiene.

  As described above, when ozone gas, a chemical solution containing chlorine dioxide, or ozone gas is used, it is clear that the virus can be inactivated even in the presence of organic matter such as fetal calf serum.

[Experiment 2]
<Test strain>
Bacterium butyris ATCC 19659 (hereinafter referred to as test strain) was used as the strain used, and Bacttriptycase soy agar (TSA) (manufactured by Difco) and Tipicoso broth TSB-BP13 (TSB) (manufactured by Leben Laboratories) were used as the medium used. ) Was used.

<Culture method>
The test strain was cultured in a TSA medium supplemented with 5 μg / ml of manganese sulfate for promoting the spore formation of the test strain, and the method of Roth et al. (Roth, S., J. Feichtinger, C., Hertel. 2010, Journal of Applied Microbiology 108,521-532).
The bacterial solution was stored at 4 ° C.

The following reagents were used for the culture.
Stabilized chlorine dioxide (made by International Dioxide Ink)
10 mM phosphate buffer solution (manufactured by Sigma)
Neutralizer: 10% Tween 80, 0.1% histidine, 0.5% sodium thiosulfate / PBS (pH 7.4) (manufactured by Sigma)
Antifoaming agent: KM-73E (manufactured by Shin-Etsu Chemical Co., Ltd.)

<Test method>
2 ml of spore bacteria solution was added to 200 ml of sterile distilled water containing 0.3% bovine albumin, which is an organic substance, to a final concentration of 1-9 × 10 ⁶ CFU / ml. Ozone was supplied to the final concentration of 3 ppm, and the supply was continued for 60 minutes. Next, 4 ml of a stabilized chlorine dioxide stock solution (500 ppm) was added to a final concentration of 10 ppm, and the mixture was incubated at 20 ° C. for 1 minute. Thereafter, ozone was further supplied at a final concentration of 3 ppm for 60 minutes.
After completion, mix with the treated bacterial solution 1 at the ratio of neutralizing agent 9, leave the treated solution at room temperature for 10 minutes to promote neutralization of chlorine dioxide and evaporation of ozone, and then survive. Was calculated.

<Judgment>
To confirm the survival of the spore bacteria, a 10-fold dilution series (10 ⁻¹ to 10 ⁻⁴ ) was prepared from the collected bacterial solution with PBS, and 100 μl of each of the diluted solutions was inoculated into TSA medium. After culturing at 37 ° C. for 48 hours, the number of colonies (CFU) grown on the medium was counted to calculate the number of viable bacteria.

  At the same time, enrichment with a liquid medium was also performed to confirm the presence of residual bacteria. Specifically, 200 μl of the collected bacterial solution was inoculated into 2 ml of TSB and cultured at 37 ° C. for 48 hours. When the color change or turbidity of the indicator in the medium occurred, it was determined that the bacteria could not be sterilized, and when neither was observed, the bacteria did not grow.

<Result>
There were no colonies growing on the TSA medium, and neither the color change nor turbidity of the indicator in the TSB medium was observed, and 100% of the spore bacteria in the ozone-treated solution containing the organic matter could be inactivated. The experiment of Example 2 was conducted at Nagoya University School of Medicine.

  According to the present invention, by treating with ozone gas, stabilized chlorine dioxide, ozone gas, as described above, the present invention uses organic oxygen in the order of active oxygen donor, stabilized chlorine dioxide, and active oxygen donor. The pathogenic microorganism in the aqueous medium containing it can be inactivated efficiently by the synergistic effect of the said component.

  As shown in Experimental Examples 1 and 2, pathogenic microorganisms in an aqueous medium containing an organic substance having a concentration higher than usual of 0.3% or 1.0% are ozone 2 to 3 ppm, stabilized chlorine dioxide 10 ppm, ozone 2 The ability to inactivate at a low concentration of 3 ppm is very effective, the concentration of organic substances in normal hospital effluent is about 0.02%, and the normal concentration when using stabilized chlorine dioxide as a disinfectant is 300. From the fact that it is ˜400 ppm, it is clear that the effect is extremely amazing.

  In the above-described embodiment, the storage tank main body 51 of the waste liquid storage means 3 has been described as being configured by a panel assembly structure installed on the ground. However, in the other embodiments of the present invention, the storage tank main body 51 is described. Instead of this, the storage tank body may be realized by a concrete structure buried in the ground. Even when such a configuration is employed, similar effects can be achieved.

DESCRIPTION OF SYMBOLS 1 Processing apparatus of infectious waste liquid 2 Infectious waste liquid 3 Waste liquid storage tank 5 Reaction tank 6 Chemical liquid storage tank 7 Ozone gas generation source 8 Chemical liquid transport means 9 Waste liquid circulation means 10 Control apparatus 12 Storage space 13 Reaction tank main body 14 Watering head 15 Side wall 16 Bottom 17 Injection nozzle 20 Storage space 21 Storage tank body 22 Bottom 23 Liquid surface 24a, 24b Chemical liquid supply pump 25 First chemical liquid transport pipe 26 Second chemical liquid transport pipe 27 Main pipe 28 Bulkhead 29a, 29b Storage space 30a, 30b Branch pipe 31 32; 33; 34a, 34b; 35; 36; 37 First to seventh transport pipes 38, 39 First and second bypass pipes 40 Ozone gas supply pipes 41a, 41b Pressure pipes 45a, 45b Circulating pumps FS1; FS2; FS3a , FS3b Liquid level detector J1a, J1b; J2a, J2b First and second flexible Joint PG1a, PG1b Pressure detector S1 Strainer V1 Check valve V11; V12; V13a, V13b; V14a, V14b; V15 First to fifth gate valves V16a, V16b V2b gate valve

Claims (6)

And containing not pathogenic microorganisms including pathogenic virus, a waste liquid tank for storing the infectious waste from medical institutions or microorganism-associated facilities,
A reaction tank in which waste liquid stored in the waste liquid storage tank is supplied, a chemical liquid containing ozone gas and chlorine dioxide is sequentially brought into contact with the supplied waste liquid, and pathogenic microorganisms in the waste liquid are inactivated,
A chemical storage tank for storing the chemical,
An ozone gas generation source for generating the ozone gas;
A chemical solution transporting means for supplying the chemical solution stored in the chemical solution storage tank to the reaction tank;
A waste liquid circulating means for circulating the waste liquid in the reaction tank while ozone gas is supplied from the ozone gas generation source,
The infectious waste liquid treatment apparatus includes a control means for controlling the supply amount of the chemical solution supplied from the chemical solution transporting means to the reaction tank and the supply amount of the ozone gas supplied from the waste liquid circulation means to the reaction tank in time series. And
Said control means, first by time supply the predetermined ozone gas from the waste liquid circulation means into the reaction vessel, by the ozone gas after being destroyed or damaged cell walls of pathogenic microorganisms, the ozone gas from the effluent circulation means to the reaction vessel the feed is stopped, after supplied second time the predetermined chemical liquid from the chemical transport means to the reaction vessel and allowed to supply a third time predetermined ozone gas from the waste liquid circulation means to the reaction vessel, stopping the supply of the ozone gas A treatment apparatus for infectious waste liquid, characterized in that it can be set to an operation mode in which a supply pattern is repeated. And containing not pathogenic microorganisms including pathogenic virus, a waste liquid tank for storing the infectious waste from medical institutions or microorganism-associated facilities,
A reaction tank in which waste liquid stored in the waste liquid storage tank is supplied, a chemical liquid containing ozone gas and chlorine dioxide is sequentially brought into contact with the supplied waste liquid, and pathogenic microorganisms in the waste liquid are inactivated,
A chemical storage tank for storing the chemical,
An ozone gas generation source for generating the ozone gas;
A chemical solution transporting means for supplying the chemical solution stored in the chemical solution storage tank to the reaction tank;
A waste liquid circulating means for circulating the waste liquid in the reaction tank while ozone gas is supplied from the ozone gas generation source,
The infectious waste liquid treatment apparatus includes a control means for controlling the supply amount of the chemical solution supplied from the chemical solution transporting means to the reaction tank and the supply amount of the ozone gas supplied from the waste liquid circulation means to the reaction tank in time series. And
In the state where ozone gas is continuously supplied from the waste liquid circulation means to the reaction tank, the control means destroys or damages the cell wall of pathogenic microorganisms after a predetermined fourth time has elapsed since the start of ozone gas supply. When is Ru, characterized in that after being supplied fifth time the predetermined chemical liquid from the chemical transport means to the reaction vessel, it is possible to set the operation mode to repeat the sixth supply pattern to the time stop defining a supply of the chemical pre Infectious waste liquid treatment equipment.   3. The infectious waste liquid treatment apparatus according to claim 1, wherein the waste liquid circulation means has a discharge section for ejecting ozone gas generated from an ozone gas generation source from the side into the reaction tank. And containing not pathogenic microorganisms including pathogenic viruses, supplying the infectious waste into the reaction vessel from the waste liquid storage tank for storing the infectious waste from medical institutions or microorganism-associated facilities, then the infectious waste, reaction While circulating in the circulation path from the tank to the reaction tank through the piping, ozone gas is supplied to the reaction tank to destroy or damage the cell walls of the pathogenic microorganisms , and then the chemical solution containing chlorine dioxide is added to the reaction tank. In the waste liquid characterized in that the pathogenic microorganisms in the waste liquid are inactivated by further supplying ozone gas to the reaction tank and bringing into contact with the waste liquid containing the pathogenic microorganisms in the circulation. Inactivation method of pathogenic microorganisms. And containing not pathogenic microorganisms including pathogenic virus, the effluent from the medical institution or microorganism-associated facilities discharged from the reaction vessel side to generate a swirling flow in the reaction vessel, by the circulation, turning in the reaction vessel The method for inactivating pathogenic microorganisms according to claim 4, wherein the flow is maintained. And containing not pathogenic microorganisms including pathogenic viruses, while the effluent from the medical institution or microorganism-associated facilities is circulated by the circulation path, to not disrupt the cell walls of pathogenic microorganisms by the ozone gas continuously supplying ozone gas is damaged, the ongoing supply of the ozone gas, inactivation method of pathogenic microorganism according to claim 5, characterized in that to supply the chemical liquid chlorine dioxide.

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