JPH0487679A - Sterilizing equipment for waste water produced in dissection room or the like - Google Patents

Abstract

PURPOSE:To completely and easily sterilize the pathogens and microorganisms which may be contained in the waste water produced in a dissection room, etc., by constituting a sterilizer of a sterilizing tank and a heat source body disposed in the sterilizing tank. CONSTITUTION:A valve 10 is closed by the detection signal from a 2nd water level sensor 11 when the volume of the waste water in the sterilizing tank 31 attains a prescribed water level or above. A timer set with heating time simultaneously starts operating and an electric resistance heating element 32 is energized, by which the waste water in the sterilizing tank 31 is heated. The temp. of the waste water is measured by a temp. sensor 12 provided in the sterilizing tank 31. The temp. of the waste water is automatically controlled by controlling the electric power supplied to the electric resistance heating element 32 in correspondence to the deviation between the measured temp. and the set temp. The waste water is kept at a specified temp. (for example, 60 to 100 deg.C) and is sterilized by heating for a specified period of time (for example, >=20 minutes). A signal is generated from a timer upon lapse of the preset heating time. The electric supply to the electric resistance heating element 32 is then shut off and a valve 13 is opened. The waste water with which the sterilization treatment is completed is thrown through a 4th distributing pipe 14 to sewerage, etc.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is applicable to dissection rooms, operating rooms, five treatment rooms, medical or pharmaceutical laboratory animal facilities (generally called animal centers), or It relates to equipment for sterilizing wastewater generated from chemical industry production facilities or research facilities.

[Prior art] In recent years, infectious diseases such as AIDS and viral hepatitis for which complete treatments have not yet been established have been occurring frequently, and pathological autopsies, surgeries, and treatments for patients who may be infected with these diseases have been occurring frequently. Opportunities to do so are increasing. Therefore, dissection rooms, operating rooms,
Wastewater generated from treatment rooms may contain biohazardous substances such as bacteria and viruses.

Furthermore, in order to develop treatments and drugs for incurable diseases, animal experiments are conducted at animal centers, but there is a growing concern that the feces, urine and wastewater generated from animal centers may also contain biohazardous substances. “Biohazard is sometimes translated as biological hazard or biological disaster.In a broad sense, it means danger or damage caused by living things, but in reality,
In-laboratory infections, where researchers are infected with the pathogenic microorganisms (bacteria, viruses, fungi, and parasites) they are studying in laboratories, and nosocomial infections, where doctors and patients are infected with drug-resistant bacteria in hospitals, are problems. becomes. Furthermore, it is also necessary to take into account the possibility that microorganisms may leak outside the laboratory or hospital or be transported by people. ” and is commonly used in the fields of medicine, pathology, and biochemistry).

Therefore, in order to prevent the leakage and spread of biohazard substances into the external environment, it has become more important and essential than ever to perform appropriate disinfection and sterilization treatment on these wastewaters.

Furthermore, in the field of biochemical industry, genetic manipulation techniques are used to create new microorganisms and their applications are being attempted. On the other hand, there is a risk that new microorganisms may have an adverse effect on the external biological environment of humans, etc., so it is necessary to completely kill the microorganisms contained in wastewater generated from production facilities or research facilities of the biochemical industry.

Conventionally, the method of sterilizing such wastewater has been to manually add chemicals. In other words, the wastewater is stored in a water storage tank until it reaches a predetermined amount, and once it is confirmed that the wastewater has reached a predetermined amount, a predetermined amount of disinfectant and sterilization agent is added manually, stirred, and left to stand. Disinfection and sterilization of pathogens and microorganisms that may have been carried out was carried out. After that, chemical wastewater treatment is carried out by gradually adding neutralizing agent 5 manually to make the wastewater neutral, and the wastewater is treated so that it does not pose a problem even if it is disposed of. Wastewater was being disposed of.

[Problems to be Solved by the Invention] However, the above-mentioned conventional technology has the following problems.

Problems (11) It is necessary for humans to check the amount of water stored, add disinfectant and sterilizing chemicals, check the neutrality of disinfected and sterilized wastewater, and add neutralizing agents, which imposes a heavy labor burden on humans. There is a risk of malfunction.

Problem (2) It takes a long time to sterilize wastewater containing solids. In order to completely sterilize the inside of a solid object, the chemical must penetrate into the inside, but this takes several days.

Problem (3) Since disinfecting and sterilizing agents are introduced, there is a great risk of corrosion and damage to the inner walls of the water storage tank, which poses problems in terms of the possibility of drainage leakage and repair of the tank.

Problem (4) Furthermore, running costs are high due to the high cost of disinfectant and sterilization agents.

Problem (5) Since it is necessary to add a neutralizing agent etc. after adding the disinfectant and sterilizing agent, operation and operation are complicated.

Problem (6) Since a complicated neutralization process is required, errors are likely to occur, and there is a risk of erroneously disposing of wastewater that is outside the disposal standard range, for example, highly acidic wastewater.

Problem (7) Since it is necessary to add a neutralizing agent and measure the neutrality, there is a problem in that the cost of the neutralizing agent and the repair cost of the measuring device are high, and the running cost is high.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide equipment for sterilizing wastewater generated from an autopsy room, etc., in order to completely and easily sterilize pathogens and microorganisms contained in the wastewater generated from the autopsy room. .

[Means for Solving the Problems] The above object is achieved by using the sterilization equipment according to claim 1, that is, temporarily storing wastewater generated from an autopsy room, etc., and storing it in a water storage tank equipped with a first water level sensor and a water storage tank. A sterilization equipment for wastewater generated from an autopsy room, etc., which has an elevated tank that pumps up and stores wastewater, and a sterilizer that heats and sterilizes the wastewater. The sterilization tank stores wastewater to be sterilized and is equipped with a second water level sensor and a temperature sensor, and between the water storage tank and the elevated tank is a second tank with a pump and a valve.
The elevated tank and the sterilizer are connected by a third water pipe with a valve, the elevated tank is located at a higher position than the sterilizer, and the outlet of the sterilizer has a valve. This is achieved by means of a sterilization facility for wastewater coming from an autopsy room or the like, which is connected to a sewer or the like by a fourth water pipe having a sterilization system.

In another embodiment of the invention, the heat source comprises a spiral metal tube through which high pressure steam is passed.

In yet another embodiment of the invention, the heat source comprises an electrical resistance heating element.

In a preferred embodiment of the present invention, the invention further includes a mixer into which cooling water is introduced, and the outlet of the sterilizer is connected via the mixing port by a fourth water pipe having a valve.
Connected to sewers, etc.

[Embodiments] Examples of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a wastewater sterilization equipment according to a first embodiment of the present invention. It is preferable that the first water pipe 4, which guides the waste water generated from the dissecting room or the like to the water tank 1, is not horizontal but inclined, as shown in FIG. A first water level sensor 5 is provided in the water storage Wjl, and based on a detection signal from the water level sensor 5, the water pump 7 is controlled to be driven and stopped, and the valve 8 is controlled to be opened and closed.

The water storage tank 1 and the elevated tank 2 are connected by a second water pipe 〇 having a water pump 7 and a valve 8. The heat sterilizer 3 mainly includes a sterilization tank 31 and an electric resistance heating element 32. Valves 1o and 13 are provided at the inlet and outlet of the sterilization tank 31, respectively.

The outer wall of the sterilization tank 31 is preferably made of stainless steel from the viewpoint of corrosion resistance and heat conductivity.

The sterilization tank 31 is also provided with a second water level sensor II and a temperature sensor 12, and the opening/closing of the valve l0113 is controlled by the detection signal of the water level sensor 11 and the detection signal via the timer. , the on/off of the electric resistance heating element 32 is controlled. On the other hand, temperature sensor 12
The electric power of the electric resistance heating element 32 is also controlled by the detection signal and the detection signal passed through the timer.

The elevated tank 2 is located at a higher position than the heat sterilizer 3, but there is a valve l between the elevated tank 2 and the heat sterilizer 3.
It is connected by a third water pipe 9 with O.

On the other hand, the outlet of the heat sterilizer 3 has a fourth valve 13.
It is connected to a general sewer system etc. by a water pipe 14.

Next, the operation of the wastewater sterilization equipment of this first embodiment will be explained in detail.

During dissection or during washing and cleaning after dissection, waste water flows from the dissection chamber through the first water pipe 4 into the water tank l. In particular, by slanting the first water pipe 4 toward the water storage tank l instead of horizontally, the wastewater flows naturally, and it is possible to prevent wastewater from accumulating in the middle of the first water pipe 4, which improves safety and hygiene. preferable.

Discontinuously generated wastewater is temporarily stored in water storage [1]. The inner wall 1a of the water storage WJ1 is preferably made of stainless steel to prevent corrosion and chemical reactions caused by drainage. Furthermore, in order to prevent environmental pollution as much as possible, a lid 1b should be provided to substantially seal the water storage tank 1.

When the water level of the waste water stored in the water storage tank 1 exceeds a predetermined upper level, the first water level sensor 5 generates a detection signal. This detection signal automatically activates the water pump 7, opens the valve 8, and pumps the waste water stored in the water tank 1 to the elevated tank 2. Then, when the water level of the waste water in the water storage tank decreases to below another predetermined level, the first water level sensor 5 generates another detection signal. In response to this other detection signal, the water pump 7 is automatically stopped, the valve 8 is closed, and the pumping of the waste water in the water tank is completed.

In this way, the amount of wastewater stored in the water tank is controlled so that the water level is within a certain range between the upper predetermined level and the lower predetermined level, and excess wastewater is automatically pumped to the elevated tank. and stored.

A reflux pipe may be provided at the top of the elevated tank to serve both as an air vent and as a drain overflow.

The valve 10 is open and the valve 13 is closed except during the period of sterilization of wastewater and the period of disposal of sterilized wastewater.

Therefore, the waste water stored in the elevated tank 2 is naturally stored in the sterilization tank 31 of the heat sterilizer 3 due to the head difference. When the amount of drainage in the sterilization tank 31 increases and reaches a predetermined water level or higher, the second water level sensor 11 generates a detection signal. In response to this detection signal, the valve 10 is closed, and at the same time, a timer that has set a heating time starts operating, and further, the electric resistance heating element 32 is energized, and the waste water in the sterilization tank 31 is heated. A temperature sensor 12 is placed in the sterilization tank 31 to measure the temperature of the waste water. The temperature of the waste water is automatically controlled by adjusting the power supplied to the electric resistance heating element 32 in accordance with the deviation between the measured temperature and the set temperature. The waste water is sterilized by heating it for a certain period of time (for example, 20 minutes or more) while keeping it at a constant temperature (for example, 60 to 100°C). When the preset heating time elapses, a signal is generated from the timer, the electricity supply to the electrical resistance heating element 32 is cut off, the valve 13 is then opened, and the sterilized wastewater is transferred to the fourth water pipe 14. The waste passes through the wastewater and is disposed of in sewers, etc.

When the disposal is completed, the valve 13 is automatically closed, the valve IO is opened, and the waste water stored in the elevated tank 2 begins to be introduced into the sterilization tank 31 again.

Next, a second embodiment of the present invention will be described.

FIG. 2 is a schematic diagram of a wastewater sterilization equipment according to a second embodiment of the present invention. Figure 2 is almost the same as Figure 1, but
In the figure, the heat source is an electric resistance heating element 32, whereas in FIG. 2, the heat source is a spiral metal tube 33,
The difference is that a spiral metal pipe 33 is placed in a sterilization tank, the spiral metal pipe is connected to high pressure steam piping in a hospital facility, and high pressure steam is passed through the spiral metal pipe to heat the waste water.

Furthermore, since the second embodiment of the present invention differs from the first embodiment in the control of heating start and end, it will be explained below.

When the amount of drainage in the sterilization tank 31 increases and reaches a predetermined water level or higher, the second water level sensor 11 generates a detection signal. In response to this detection signal, the valve 10 closes, and at the same time, the electromagnetic valve 34 provided in the high-pressure steam supply pipe opens, and high-pressure steam is introduced into the spiral metal pipe. The heat of this high-pressure steam is conducted to the waste water, and the waste water in the sterilization tank 31 is heated. A temperature sensor 12 is placed in the sterilization tank 31 to measure the temperature of the waste water. When the measured temperature exceeds the set temperature, the solenoid valve 34 is automatically closed to cut off the supply of high pressure steam into the spiral metal tube. The waste water is sterilized by heating it at a temperature of 60°C or higher (preferably around I[l[l'C) for a certain period of time (for example, 20 minutes or more). When the preset heating time has elapsed, a signal is generated from the timer and the solenoid valve 34 is activated.
The sterilization process is completed by closing the tube and cutting off the supply of high-pressure steam into the spiral metal tube. Then, the valve 13 is opened, and the sterilized wastewater passes through the fourth water pipe 14.
Fig. 3 is a schematic diagram of a wastewater sterilization equipment according to a third embodiment of the present invention. FIG. 3 is almost the same as FIG. 1, but the sterilized wastewater discharged from the heat sterilizer 3 is
After being mixed with water and reducing the temperature of the wastewater,
They differ in that they are disposed of in sewers, etc.

[Effects] The wastewater sterilization equipment according to the present invention is an automatic operation and control system, so human labor and operation are reduced.
The burden is low and there is no risk of incorrect operation. Furthermore, there is little risk of infection to the operator, making the system excellent in terms of safety and health.

In addition, since this wastewater sterilization equipment uses a heat sterilization method, there is no corrosion or deterioration of the equipment due to the input chemicals, and there is no need for neutralization treatment. As a result, the equipment is simple and has a particularly sealed structure, making the entire system highly reliable and safe. Furthermore, it has the advantage of low running costs.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a wastewater sterilization equipment according to a first embodiment of the present invention, FIG. 2 is a schematic diagram of a second embodiment, and FIG. 3 is a schematic diagram of a third embodiment. be. l...Water tank l a-inner wall lb-lid 2...elevated tank 3...thermal sterilizer 31--sterilizer tank 32-electrical resistance heating element 33-spiral metal pipe 34--electromagnetic valve 4.6.9, + 4-...Water pipe 5, ll-・Water level sensor 7・-Lifting pump 8.1O513-・Valve 12-・Temperature sensor! 5-...Blender

Claims (1)

[Scope of Claims] 1. A water tank that temporarily stores wastewater generated from an autopsy room, etc. and is equipped with a first water level sensor, an elevated tank that pumps up and stores the wastewater stored in the water tank, and a sterilizer that heats and sterilizes the wastewater. A sterilization equipment for wastewater generated from an autopsy room, etc. having It is equipped with a second water level sensor and a temperature sensor, and the water storage tank and the elevated tank are connected by a second water distribution pipe that has a pump and a valve, and the valve is connected between the elevated tank and the sterilizer. Equipment for sterilizing wastewater originating from dissecting rooms, etc., which is connected to a sewer or the like by a fourth water pipe having a valve at the outlet of the sterilizer. 2. The equipment for sterilizing waste water generated from an autopsy room or the like according to claim 1, wherein the heat source is formed by passing high-pressure steam through a spiral metal tube. 3. The equipment for sterilizing waste water generated from an autopsy room or the like according to claim 1, wherein the heat source is an electric resistance heating element. 4. It has a mixer into which cooling water is introduced, and the outlet of the sterilizer is connected to a sewer, etc. via the mixer by a fourth water pipe with a valve.
A sterilization equipment for wastewater generated from an autopsy room or the like according to any one of claims 1 to 3.