KR101053132B1 - Sewage water treatment and hvac system for hospital - Google Patents

Abstract

PURPOSE: A system for processing and sterilizing infective wastewater discharged from a hospital is provided to purify and sterilize air and wastewater discharged from the hospital by introducing chlorine dioxide with the superior cleaning force. CONSTITUTION: A precipitating chamber(110) receives wastewater from a hospital as raw water. A screen tank(120) receives the raw water and includes a screen for eliminating impurities. A filtering drum screen(130) receives the raw water through the screen tank and eliminates foreign materials contained in the raw water. A flux controlling bath(125) receives the raw water from the screen tank and supplies the raw water to the filtering drum screen. A chemical reacting unit is composed of a raw water storing tank, a chemical reactor, a chemical injector, and a sludge skimmer. The raw water passes through a anaerobic bath and an anoxic bath. A processed water tank stores purified water.

Description

Hospital discharge infectious wastewater treatment and sterilization air conditioning system {SEWAGE WATER TREATMENT AND HVAC SYSTEM FOR HOSPITAL}

The present invention relates to a wastewater treatment and air conditioning system, and more particularly, for the treatment of infectious wastewater discharged from a hospital and sterilization of wastewater and air by adding chlorine dioxide for sterilization of air discharged outside the hospital. Hospital discharge infectious wastewater treatment and sterilization air conditioning system.

Recently, with increasing interest in health, more and more people are visiting hospitals for the purpose of health examinations, and the size of hospitals is also increasing.

In addition, new medical equipment, drugs, and drugs are being used in operating rooms and laboratories due to a variety of new diseases.As a result, people entering or leaving the hospital may experience various contaminants such as medical waste, air pollutants, and water pollutants. The possibility of exposure to materials is increasing.

Hospitals are likely to have a lesser impact on hazardous substances within a limited range, but the hazardous substances released from hospitals are unrecoverable and have long-term contamination problems.

In addition, the waste water and the air discharged from the hospital have a specificity in that they are likely to contain toxic substances such as various chemicals and pathogenic microorganisms such as Escherichia coli, particularly infectious bacteria.

Therefore, regardless of the characteristics of general items such as pollutant items (BOD, COD, SS), waste water and air discharged from the hospital must be purified in consideration of the recovery and degradability difficulties generated during the discharge. There is a need to develop an air conditioning system with added wastewater purification and sterilization.

The present invention relates to a system for purifying wastewater and air discharged from a hospital by using chlorine dioxide, and an embodiment of the present invention includes an immersion chamber into which wastewater from a hospital being treated water flows into raw water; A screen tank installed at one side of the immersion chamber to receive raw water from the immersion chamber, and having at least one screen for removing impurities; Filtration drum screen is supplied to the raw water passed through the screen tank, to remove foreign substances contained in the raw water; An anaerobic tank supplied with raw water through a filtration drum screen; An anoxic reaction tank installed on one side of the anaerobic tank, supplied with raw water through the anaerobic tank, and supplying the sludge mixed solution to the anaerobic tank; A membrane separation tank installed at one side of the anoxic reaction tank and supplied with a sludge mixed liquid of the anoxic reaction tank; At least one membrane unit which is installed inside the membrane separation tank and is separated by a suction pump provided on one side of the membrane separation tank to allow the mixture to flow into the interior through the pores; And a treated water tank configured to store the treated water purified through the membrane unit, wherein the membrane unit and the treated water tank are connected by the treated water discharge pipe, and the treated water of the treated water discharge pipe is connected to one side of the treated water discharge pipe. The treatment water circulation pipe is circulated to the side, and one side of the treatment water circulation pipe is provided with chlorine dioxide supplying means, and the chlorine dioxide is supplied to the treatment water discharge pipe and the treatment water circulation pipe. Related.

According to one preferred embodiment of the present invention, the sedimentation chamber which is introduced into the raw water of the waste water of the hospital being treated water; A screen tank installed at one side of the immersion chamber to receive raw water from the immersion chamber, and having at least one screen for removing impurities; Filtration drum screen is supplied to the raw water passed through the screen tank, to remove foreign substances contained in the raw water; An anaerobic tank supplied with raw water through a filtration drum screen; An anoxic reaction tank installed on one side of the anaerobic tank, supplied with raw water through the anaerobic tank, and supplying the sludge mixed solution to the anaerobic tank; A membrane separation tank installed at one side of the anoxic reaction tank and supplied with a sludge mixed liquid of the anoxic reaction tank; At least one membrane unit which is installed inside the membrane separation tank and is separated by a suction pump provided on one side of the membrane separation tank to allow the mixture to flow into the interior through the pores; And a treated water tank configured to store the treated water purified through the membrane unit, wherein the membrane unit and the treated water tank are connected by the treated water discharge pipe, and the treated water of the treated water discharge pipe is connected to one side of the treated water discharge pipe. The treatment water circulation pipe circulating to the connection is connected, and one side of the treatment water circulation pipe is provided with chlorine dioxide supplying means, and the chlorine dioxide is supplied to the treatment water discharge pipe and the treatment water circulation pipe. Is provided.

Here, some of the chlorine dioxide supplied from the chlorine dioxide supply means is characterized in that it is sprayed inside the air duct is installed exhaust fan for sterilization of the air discharged to the outside of the hospital.

Further, the chlorine dioxide supply means includes a sodium chlorite storage tank, a brine storage tank, and a chlorine dioxide generator that generates chlorine dioxide by electrolysis, and the generated chlorine dioxide is installed on one side of the chlorine dioxide generator. It is characterized in that stored in the chlorine storage tank.

On the other hand, it is installed on one side of the screen tank, receiving the filtered raw water from the screen tank, may be further included a flow rate adjusting tank for supplying to the filtration drum screen when stored above a predetermined capacity.

In addition, the sludge mixed liquid of the membrane separation tank is supplied when the sludge mixed liquid containing the nitrate nitrogen component and the sludge remaining in the membrane separation tank is solid-liquid separated by the membrane unit and is left in the membrane separation tank. At the time of supplying the supplied sludge mixed solution to the anoxic reaction tank, when the MLSS concentration in the membrane separation tank is high, it may further include a stabilization tank for supplying the sludge mixed liquid to the sludge storage tank.

At this time, one side of the flow adjustment tank is characterized in that the chemical reaction device for supplying the flow adjustment tank after adjusting the PH by adding a chemical to the raw water.

At this time, the chemical reaction device, a raw water storage tank for storing the raw water; A chemical reaction tank installed on one side of the raw water storage tank and receiving raw water; A chemical injector installed at one side of the chemical reaction tank to inject chemical into the chemical reaction tank; And a sludge skimmer which is installed at the other side of the chemical reaction tank and receives sludge received from chemical treatment in the chemical reaction tank and supplies the sludge to the flow rate adjustment tank.

According to the hospital discharge infectious wastewater treatment and sterilization air conditioning system according to an embodiment of the present invention, by introducing chlorine dioxide (ClO ₂ ) having a strong cleaning power, it is possible to purify and sterilize the wastewater and air discharged from the hospital, in particular The risk of leaking pathogenic microorganisms or viruses can be prevented.

In addition, since the purification and sterilization is performed using chlorine dioxide, it is possible to overcome the problem of the generation of disinfection by-products (THMs, HAAs, etc.) generated during the conventional chlorine and ozone disinfection.

In addition, it is possible to effectively remove the oil sludge (oil sludge) contained in the waste water, and by chlorine dioxide guided to one side of the door to spray, it is possible to prevent the propagation of pathogenic microorganisms by opening and closing the door when entering the hospital.

1 is a block diagram of a hospital discharge infectious wastewater treatment and sterilization air conditioning system according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of a hospital discharge infectious wastewater treatment and sterilization air conditioning system according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.

Example

1 is a block diagram of a hospital discharge infectious wastewater treatment and sterilization air conditioning system according to an embodiment of the present invention.

As shown in Figure 1, the hospital discharge infectious wastewater treatment and sterilization air conditioning system 10 according to an embodiment of the present invention, the sedimentation chamber 110, the sedimentation chamber 110 is introduced into the raw water of the hospital wastewater to be treated, Screen tank 120 is installed on one side of the chamber 110 to receive raw water from the sedimentation chamber 110 to remove the contaminants mixed in the raw water, and the raw water passed through the screen tank 120 is supplied with foreign matter contained in the raw water. Filtration drum screen 130 to remove the, and the anaerobic tank 140, the raw water passed through the filtration drum screen 130, and installed on one side of the anaerobic tank 140, raw water is supplied through the anaerobic tank 140 An anoxic reaction tank 150 for supplying the sludge mixed solution to the anaerobic tank 140, a membrane separation tank 160 installed at one side of the anoxic reaction tank 150, and supplied with a sludge mixed solution of the anoxic reaction tank 150, and a membrane separation tank ( Installed inside the 160) to separate the mixture It is configured to include a process water tank 190 for storing the treated water purified through the at least one membrane unit 170, and the membrane unit 170. The

Here, the membrane unit 170 and the treated water tank 190 are connected by the treated water discharge pipe 172, and the treated water of the treated water discharge pipe 172 is connected to one side of the treated water discharge pipe 172 to the membrane unit 170. The treatment water circulation pipe 174 to be circulated to is connected, one side of the treatment water circulation pipe 174 is provided with chlorine dioxide supply means 200, chlorine dioxide in the treatment water discharge pipe 172 and the treatment water circulation pipe 174, respectively Supplied.

Hereinafter, each configuration will be described in detail according to the treatment sequence of the wastewater.

Waste water of the hospital being treated water is introduced into the sedimentation chamber 110 as raw water, and the raw water stored in the sedimentation chamber 110 flows into the screen tank 120 when the stored raw water reaches a predetermined capacity or more.

In this case, the screen tank 120 is provided with at least one screen (not shown) in the form of a grid network to remove coarse contaminants, and the raw water filtered through the screen tank 120 of the screen tank 120 It is supplied to the flow rate adjustment tank 125 disposed at one side lower.

When the raw water supplied to the flow regulating tank 125 reaches a predetermined volume or more, it is transferred to the filtration drum screen 130 by a pump immersed in the flow regulating tank 125.

The filtration drum screen 130 is made of a fine grid screen screen cylindrical, removes fine contaminants while rotating by the drive of the motor, the raw water filtered through the filtration drum screen 130 is anaerobic tank 140 Is supplied.

The raw water supplied to the anaerobic tank 140 is mixed with the returned water returned from the anoxic reactor 150 to be described later, and the mixture is stirred by the water agitator immersed in the anaerobic tank 140 to be in smooth contact with the microorganisms, and Phosphorus components present in the return water are eluted and released, while some organic substances are removed.

At this time, when the raw water supplied to the anaerobic tank 140 reaches a predetermined capacity or more, naturally flows into the anaerobic reaction tank 150 installed on one side of the anaerobic tank 140 to flow.

In the anoxic reaction tank 150, the raw water supplied from the anaerobic tank 140 is mixed with the return water returned from the stabilization tank 180 which will be described later, and the nitric acid nitrogen component contained in the raw water and the return water is removed by the denitrification reaction. do. This is because the return water returned from the stabilization tank 180 contains a large amount of nitrogen components modified into nitrate nitrogen by aeration, and this nitrate nitrogen flows into the anoxic reaction tank 150 in which free oxygen does not exist, and thus the oxygen-free reaction tank. This is because it is separated from the bound oxygen by the denitrifying microorganisms in the gas and converted into nitrogen gas (N ₂ ) and released into the atmosphere.

At this time, the organic carbon source required for the denitrification microorganism is to be covered by the organic material in the incoming raw water, in order to facilitate the denitrification by properly mixing the raw water introduced from the anaerobic tank 140 and the return water returned from the stabilization tank 180. , It is preferable that a water stirrer is installed in the oxygen-free reaction tank 150.

Some of the raw water of the anoxic reaction tank 150 is returned to the anaerobic tank 140 by a pump immersed in the anoxic reaction tank 150, so that the suspended solids (MLSS) concentration in the anaerobic tank 140 maintains a constant value.

When the raw water introduced into the anoxic reaction tank 150 reaches a predetermined capacity or more, the raw water flows naturally into the membrane separation tank 160 installed on one side of the anoxic reaction tank 150.

Here, the sludge mixture supplied to the membrane separation tank 160 includes organic pollutants, phosphorous substances, suspended solids, ammonia nitrogen (NH ₃ -N), and nitrite nitrogen (NO ₂ -N).

In the membrane separation tank 160, mixed liquor suspended solids (MLSS) at a concentration suitable for operating conditions exist. Organic pollutants are consumed and removed as a substrate of the MLSS, and ammonia nitrogen and nitrite nitrogen components are removed from the membrane. In the aerobic state in the separation tank 160 is converted into nitrate nitrogen through a nitrification process, the phosphorus-based material is absorbed and removed in excess by the microorganisms in the membrane separation tank (160).

At this time, at least one membrane unit 170 is installed in the membrane separation tank 160, and the remaining particulate suspended matter (SS, MLSS) contained in the raw water supplied to the membrane separation tank 160 is the membrane unit 170. The solid-liquid separation is introduced into the membrane through the pores of), some of the treated water is transferred to the treated water tank 190 by the suction pump 176, and the other part is returned to the membrane separation tank 160.

At this time, the treated water transferred to the treated water tank 190 through the membrane unit 170, or returned to the membrane separation tank 160 is mixed with chlorine dioxide supplied from the chlorine dioxide supply means 200 to be described later. Conveyed or conveyed in a state.

In addition, in order to remove the phosphorus component contained in the raw water, it is preferable that a flocculant which aggregates the phosphorus component is supplied from the flocculant storage tank 178 to the membrane separation tank 160.

On the other hand, the sludge mixed liquid containing the nitrate nitrogen component and sludge remaining after the process through the membrane unit 170, when reaching a predetermined capacity or more, stabilization tank 180 is installed on one side of the membrane separation tank 160 Will flow into.

The sludge mixed liquid of the stabilization tank 180 is selectively transferred to the sludge storage tank 192 or the anoxic reaction tank 150 by a pump immersed in the stabilization tank 180, an oxygen-free reaction tank 150 in normal operation The sludge mixture is supplied to the furnace, and when the MLSS concentration in the membrane separation tank 160 is high, it is transferred to the sludge storage tank 192 to adjust the MLSS concentration of the membrane separation tank 160.

Meanwhile, the blower 194 preferably supplies air to an air diffuser (not shown) disposed under the membrane unit 170 through the air line A. The membrane is separated by air supplied from the air diffuser. The formation of water flow in the bath 160 allows delaying the occlusion of voids occurring at the membrane surface, thereby extending the uptime.

Therefore, the wastewater of the hospital introduced into the immersion chamber 110 is treated as described above, the treated water is stored in the treated water tank 190, and the sludge mixed in the wastewater is passed through the stabilization tank 180. The sludge storage tank 192 is to be stored.

Chlorine dioxide (ClO ₂ ) is supplied from the chlorine dioxide supply means (200) during the above-described treatment process for the sterilization of toxic substances such as various chemicals contained in the waste water of the hospital, and pathogenic microorganisms such as Escherichia coli, especially infectious pathogens. .

Chlorine dioxide is an environmentally friendly material with no residual properties. It has an oxidizing capacity of 2.6 times more than chlorine, maintains sterilizing power over a wide pH range, and unlike chlorine, trihalo methane (THMs) and haloacetic acid (HAAs) And other organic compounds are not produced.

Chlorine dioxide supply means 200 according to an embodiment of the present invention, the sodium chlorite storage tank 210, the brine storage tank 220, and the chlorine dioxide generator 230 for generating chlorine dioxide by electrolysis It includes, the generated chlorine dioxide is stored in the chlorine dioxide storage tank 240 is installed on one side of the chlorine dioxide generator 230, filtration drum screen 130, membrane separation tank 160, and the treated water tank 190 is supplied in the form of an aqueous solution.

At this time, the chlorine dioxide supply means 200 according to an embodiment of the present invention may further include a soft water generator 225 for supplying tap water to generate soft water and supply it to the chlorine dioxide generator 230.

In addition, the chlorine dioxide is sprayed on the air duct of the hospital, to sterilize the air discharged from the inside of the hospital, the injection nozzle (not shown) is installed on one side of the exhaust fan 250 installed inside the air duct And, it is preferable to mix the chlorine dioxide in the tap water supplied from the tap water supply pipe, to be sprayed in the form of an aqueous solution.

In addition, by installing a chlorine dioxide supply pipe on one side of the entrance door of the hospital, by direct injection in the form of gas (gas), it is possible to prevent the spread of pathogens leaked by opening and closing the door when entering the hospital.

On the other hand, when the wastewater contains a large amount of oil sludge, or if it is necessary to adjust the pH according to the strong acidity, it is preferable to go through the chemical reaction device 300, the chemistry according to an embodiment of the present invention The reaction apparatus 300 is installed on one side of the raw water storage tank 310 for storing the raw water, the chemical reaction tank 320 installed on one side of the raw water storage tank 310 and receiving the raw water, and the chemical reaction tank 320. And a sludge skimmer 340 for supplying a chemical injector 330 for injecting chemicals and a sludge that is supplied with chemically treated raw water using a blade attached to a conveyor belt, and then supplying it to the flow adjusting tank 125. It is configured to include.

At this time, the chemicals injected into the chemical reaction tank 320 by the chemical injector 330, for example, an oil-breaker (breaker) that breaks the ionic bonds of oil molecules, a flocculant that aggregates the foreign matter, and acidic And pH adjusting agents for changing the waste water to neutrality.

As described above, according to the hospital discharge infectious wastewater treatment and sterilization air conditioning system 10 according to an embodiment of the present invention, by introducing chlorine dioxide (ClO ₂ ) having a strong cleaning power, wastewater and air discharged from the hospital Purification and sterilization can be achieved and in particular the risk of pathogenic microorganisms or virus leakage can be prevented.

10: Hospital discharge infectious wastewater treatment and sterilization air conditioning system
110: immersion chamber 120: screen tank
125: flow rate adjustment tank 130: filtration drum screen
140: anaerobic tank 150: anoxic reaction tank
160: membrane separation tank 170: membrane unit
172: treatment water discharge pipe 174: treatment water circulation pipe
176: suction pump 178: flocculant storage tank
180: stabilization tank 190: treated water tank
192: sludge storage tank 194: blower
200: chlorine dioxide supply means 210: sodium chlorite storage tank
220: brine storage tank 225: soft water generator
230: chlorine dioxide generator 240: chlorine dioxide storage tank
250: exhaust fan 300: chemical reaction device
310: raw water storage tank 320: chemical reaction tank
330: chemical injection 340: sludge skimmer

Claims (7)

A sedimentation chamber into which wastewater of a hospital being treated water flows into raw water;
A screen tank installed at one side of the immersion chamber to receive raw water from the immersion chamber, and having at least one screen for removing impurities;
Filtration drum screen is supplied to the raw water passed through the screen tank, the foreign matter contained in the raw water;
A flow rate adjusting tank installed at one side of the screen tank and receiving raw water filtered from the screen tank, and supplying the filtered water to the filtration drum screen when a predetermined capacity or more is stored;
Is installed on one side of the flow adjustment tank, the raw water storage tank for storing the raw water, the chemical reaction tank is installed on one side of the raw water storage tank and receives the raw water, and installed on one side of the chemical reaction tank and the oil breaker and A chemical reaction device including a chemical injector for injecting a flocculant and a pH adjusting agent, and a sludge skimmer installed at the other side of the chemical reaction tank and receiving sludge from the chemical reaction tank to remove sludge and then supplying the sludge to the flow rate adjusting tank;
An anaerobic tank supplied with raw water passing through the filtration drum screen;
An anoxic reaction tank installed at one side of the anaerobic tank and supplied with raw water passing through the anaerobic tank, and supplying a sludge mixed solution to the anaerobic tank;
A membrane separation tank installed at one side of the anoxic reaction tank and supplied with a sludge mixed solution of the anoxic reaction tank;
At least one membrane unit installed in the membrane separation tank and separated by a suction pump provided on one side of the membrane separation tank while the mixture is introduced into the membrane through the pores; And
And a treated water tank configured to store the treated water purified through the membrane unit.
The membrane unit and the treated water tank are connected by a treated water discharge pipe, and one side of the treated water discharge pipe is connected to a treated water circulation pipe for circulating the treated water of the treated water discharge pipe to the membrane unit. A chlorine dioxide supply means is provided on one side, the hospital discharge infectious wastewater treatment and sterilization air conditioning system, characterized in that the chlorine dioxide is supplied to the treated water discharge pipe and the treated water circulation pipe.
The method according to claim 1,
Some of the chlorine dioxide supplied from the chlorine dioxide supply means, for disinfection of the air discharged to the outside of the hospital, the hospital discharge infectious wastewater treatment and sterilization air conditioning system, characterized in that the exhaust fan is installed inside the air duct.
The method of claim 1, wherein the chlorine dioxide supply means,
A sodium chlorite storage tank, a brine storage tank, and a chlorine dioxide generator generating chlorine dioxide by electrolysis, wherein the generated chlorine dioxide is stored in a chlorine dioxide storage tank installed on one side of the chlorine dioxide generator. Hospital discharge infectious wastewater treatment and sterilization air conditioning system.
delete The method according to claim 1,
It is installed on one side of the membrane separation tank, when the sludge mixed liquid containing the nitrate nitrogen component and sludge remaining in the membrane separation solid-liquid separated by the membrane unit is supplied with a sludge mixed liquid of the membrane separation tank, usually Supplying the sludge mixed solution supplied to the anoxic reaction tank during the operation of, and when the MLSS concentration in the membrane separation tank is high, the stabilization tank for supplying the sludge mixed liquid to the sludge storage tank further comprises the treatment of infectious wastewater discharged to the hospital And sterilization air conditioning system.
delete delete

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