CN219194755U - Hospital wastewater treatment system - Google Patents

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a hospital wastewater treatment system, which comprises a pretreatment system, a secondary treatment system and a drainage system. The pretreatment system comprises a grid pool, a wastewater lifting well, a pre-disinfection pool and a septic tank which are sequentially communicated, hospital wastewater flows into the grid pool through a pipeline, and a rotary grid machine is arranged in the grid pool. The secondary treatment system comprises an adjusting tank, a hydrolysis tank, an aerobic aeration tank, a sedimentation tank and a disinfection tank which are sequentially communicated, wherein the adjusting tank is communicated with the septic tank, and the sedimentation tank is also communicated with a sludge tank through a pipeline. The drainage system comprises a water collecting lifting well and a Buchet tank which are sequentially communicated, wherein the water collecting lifting well is communicated with the disinfection tank, and the Buchet tank is communicated with the municipal pipe network. The wastewater treatment system has good disinfection and sterilization effects and high treatment efficiency, and can effectively solve the technical problems that the existing hospital wastewater treatment process cannot continuously treat wastewater, the wastewater is not thoroughly disinfected, the denitrification and dephosphorization are not up to the standard, and the like.

Description

Hospital wastewater treatment system

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to a hospital wastewater treatment system.

Background

The hospital wastewater is mainly various toxic and harmful wastewater generated in the operation process of hospitals, contains a large amount of organic matters, nitrogen, phosphorus and other components, also contains a large amount of harmful substances such as bacteria, viruses and parasites, and has the characteristics of pollution, acute infection and latent infection. If the hospital wastewater is discharged into the water body without effective treatment, the surrounding ecological environment can be seriously influenced, and the physical health of people is endangered.

In order to ensure that hospital wastewater does not harm the social life of people, the national environmental protection agency issues 'emission standard of medical institution water pollutants' (GB 1866-2005), and strict requirements are put on pollutant control projects of sewage and waste gas and sludge generated by sewage treatment stations of the medical institution, emission and control limit values, treatment process, disinfection requirements and the like.

At present, the wastewater treatment process of most hospitals in China generally has the problems of complicated treatment flow, multi-stage transfer treatment, poor disinfection effect, substandard denitrification and dephosphorization, high suspended matter concentration in effluent, large quantity of pathogenic microorganisms contained in residual sludge and the like, and the wastewater treatment process is easy to become a secondary pollution source if the treatment is improper, and the wastewater treatment cost is increased.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a hospital wastewater treatment system which has good wastewater disinfection and sterilization effects, is integrated for continuous treatment, is safe and controllable and has high efficiency, and can effectively solve the technical problems that the existing hospital wastewater treatment process cannot realize continuous treatment, the wastewater disinfection is not thorough, the denitrification and dephosphorization are not up to the standard, and the like.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

in one aspect of the present utility model, a hospital wastewater treatment system is provided, comprising a pretreatment system, a secondary treatment system, and a drainage system;

the pretreatment system comprises a grid pool, a wastewater lifting well, a pre-disinfection pool and a septic tank which are sequentially communicated, hospital wastewater flows into the grid pool through a pipeline, and a rotary grid machine is arranged in the grid pool;

the secondary treatment system comprises an adjusting tank, a hydrolysis tank, an aerobic aeration tank, a sedimentation tank and a disinfection tank which are sequentially communicated, wherein the adjusting tank is communicated with the septic tank, and the sedimentation tank is communicated with a sludge tank through a pipeline;

the drainage system comprises a water collecting lifting well and a Buchet tank which are sequentially communicated, wherein the water collecting lifting well is communicated with the disinfection tank, and the Buchet tank is communicated with the municipal pipe network.

By adopting the technical scheme, hospital wastewater flows into the grating pond through the pipeline, sundries in the water are intercepted and collected by the rotary grating machine, the sewage filtered by the rotary grating machine enters the wastewater lifting well, and the wastewater in the wastewater lifting well enters the pre-disinfection pond for pre-disinfection treatment and then enters the septic tank for anaerobic fermentation. The wastewater is treated by the pretreatment system and then enters the secondary treatment system, and the secondary treatment system adopts an activated sludge process for treatment. The supernatant fluid of the septic tank enters an adjusting tank to balance the water quantity, the water quality and the water temperature; and then the sewage enters a hydrolysis tank, insoluble organic matters in the water are hydrolyzed into soluble organic matters under the action of a large number of hydrolytic bacteria and acidizing bacteria, and macromolecular substances which are difficult to biodegrade are converted into micromolecular substances which are easy to biodegrade, so that the biodegradability of the sewage is improved. The wastewater after hydrolysis automatically flows into an aerobic aeration tank, and organic matters are decomposed or directly converted into micromolecular matters such as carbon dioxide, water and the like through adsorption, oxidation and absorption conversion. The reacted sewage automatically flows into a sedimentation tank, solid-liquid separation is carried out in the sedimentation tank, and residual sludge is discharged into a sludge tank for storage and disinfection. And after the clear water in the sedimentation tank enters the disinfection tank for disinfection, the clear water enters a water collecting lifting well and a Baucher tank in sequence and is discharged into a municipal pipe network.

In some possible embodiments, the bottoms of the wastewater lifting well, the regulating tank and the water collecting lifting well are respectively provided with a lifting pump, and the water in the wastewater lifting well after being filtered by the rotary grating machine is lifted into the pre-disinfection tank by the lifting pumps; the water in the equalizing basin promotes to in the hydrolysis tank through the elevator pump, and the water in the water collecting lift well promotes to the bar to rest the groove through the elevator pump, detects through on-line monitoring device, discharges municipal pipe network after the control.

In some possible embodiments, the system further comprises a feeding device, wherein the feeding device comprises a pre-disinfection feeding device, a dechlorination agent feeding device, a disinfection feeding device and a sludge disinfection feeding device;

the pre-disinfection adding device is communicated with the pre-disinfection tank through a disinfection pump and a pipeline, and disinfectant is added into the pre-disinfection tank to contact with wastewater for disinfection; the dechlorination agent adding device is communicated with the septic tank through a disinfection pump and a pipeline, residual chlorine is required to be detected in the waste water disinfected in the pre-disinfection tank, and when the residual chlorine content exceeds the standard, a reductive dechlorination agent is required to be added into the septic tank through the dechlorination agent adding device for dechlorination; the disinfection adding device is communicated with the disinfection pool through a disinfection pump and a pipeline, and adds disinfectant into the disinfection pool for re-disinfection; the sludge disinfection adding device is communicated with the sludge pond through a disinfection pump and a pipeline, and disinfectants are added into the sludge pond to disinfect the residual sludge so as to remove residual pathogenic microorganisms.

In some possible embodiments, the waste water lifting well is internally provided with a lifting pump and is communicated with an emergency water tank through a pipeline, and the emergency water tank is internally provided with the lifting pump and is communicated with the waste water lifting well through a pipeline. When the amount of wastewater in the wastewater lifting well is large, the redundant wastewater can be lifted and transferred to an emergency pool for temporary storage through a lifting pump in the wastewater lifting well; when the wastewater amount in the wastewater lifting well is lower than a set value, the temporary stored wastewater can be transferred into the wastewater lifting well through the lifting pump in the emergency water tank, so that the continuity of subsequent wastewater treatment is ensured.

In some possible embodiments, the pre-disinfection adding device is communicated with the emergency water tank through a disinfection pump and a pipeline, and disinfectant is added into the emergency water tank for disinfection.

In some possible embodiments, the emergency water tank, the regulating tank, the aerobic aeration tank, the sludge tank and the dechlorination agent adding device are all internally provided with biological fillers. The biological filler provides a carrier for the attachment growth of microorganisms, bacteria are attached and combined on the surface of the filler to form a biological film, and meanwhile, the biological filler has the functions of cutting and blocking bubbles, so that the concentration of dissolved oxygen in wastewater is improved, the transfer of microorganism organic matters and dissolved oxygen is enhanced, and the treatment efficiency is improved.

In some possible embodiments, the emergency water tank, the regulating tank, the aerobic aeration tank and the sludge tank are respectively connected with a fan arranged outside the emergency water tank, the regulating tank, the aerobic aeration tank and the sludge tank through pipelines, so that the dissolved oxygen in the water body can be rapidly increased, and the requirement of microorganisms on oxygen can be met; the dechlorination agent adding device is connected with an air stirrer arranged outside through a pipeline, and is connected with a water main pipe through a pipeline and is uniformly mixed in advance.

In some possible embodiments, the bottom of the sedimentation tank is in a conical structure with thick top and thin bottom, solid and liquid in the sedimentation tank are separated, and the precipitated activated sludge is concentrated at the center of the bottom of the sedimentation tank; the bottom of the sedimentation tank is provided with a sludge pump which is respectively connected with the sludge tank, the hydrolysis tank and the aerobic aeration tank through pipelines. And (3) the sludge in the sedimentation tank is returned to the hydrolysis tank and the aerobic aeration tank at regular time by utilizing a sludge pump to perform oxidative decomposition treatment again, and the rest part is discharged into the sludge tank as surplus sludge for storage and disinfection.

In some possible embodiments, the aerobic aeration tank comprises a primary biochemical tank and a secondary biochemical tank, the biological filler content in the secondary biochemical tank is higher than that in the primary biochemical tank, and the secondary biochemical tank maintains higher biomass, so that the aim of removing organic pollutants at high speed is fulfilled. The biological filler in the primary biochemical tank adopts a beam-shaped elastic three-dimensional filler, is easy to form films and free from blockage, and the biological filler in the secondary biochemical tank adopts a columnar biological carrier filler, so that the specific surface area of the filler is large and the biological load rate is high.

In some possible embodiments, an ultrasonic flowmeter is arranged on the Baucher tank to measure the water flow of the treated discharge.

The utility model has the following beneficial effects:

the hospital wastewater treatment system provided by the utility model can carry out integrated continuous treatment on wastewater generated by hospitals, has high treatment efficiency, good disinfection and sterilization effects, thorough denitrification and dephosphorization, and is safe and controllable. The utility model carries out deslagging, pre-disinfection and anaerobic fermentation on the wastewater by a pretreatment system, and then carries out hydrolysis, acidification and oxidative decomposition by a secondary treatment system by adopting an activated sludge method, so as to decompose insoluble and difficultly biodegradable organic matters in the water into soluble and biodegradable micromolecular matters, thereby removing the organic matters and ammonia nitrogen matters. And solid-liquid separation is carried out through the sedimentation tank, a part of sludge flows back to the hydrolysis tank and the aerobic aeration tank for secondary decomposition, and a part of residual sludge enters the sludge tank for storage and disinfection, so that secondary pollution is avoided. And after entering a disinfection tank for disinfection, clear water separated in the sedimentation tank sequentially enters a water collecting lifting well and a Baucher tank and is discharged into a municipal pipe network for recycling.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structural principle of a hospital wastewater treatment system according to the present utility model;

FIG. 2 is a connection block diagram of the preprocessing system of FIG. 1;

FIG. 3 is a diagram showing the connection structure of the regulating tank, the hydrolysis tank and the aerobic aeration tank in FIG. 1;

FIG. 4 is a connection structure diagram of the sedimentation tank, the sterilization tank, the sludge tank and the drainage system in FIG. 1;

FIG. 5 is a process flow diagram of a hospital wastewater treatment system of the present utility model.

The reference numerals in the figures illustrate: 1. a pretreatment system; 11. a grille pool; 111. a rotary grid machine; 112. grid slag; 12. a waste water lifting well; 13. a pre-disinfection tank; 14. a septic tank; 15. an emergency pool; 2. a secondary treatment system; 21. an adjusting tank; 22. a hydrolysis tank; 23. an aerobic aeration tank; 231. a primary biochemical pool; 232. a secondary biochemical pool; 24. a sedimentation tank; 25. a sterilizing pool; 26. a sludge pool; 3. a drainage system; 31. a water collection lift well; 32. a bashel tank; 321. an ultrasonic flowmeter; 4. a feeding device; 41. a pre-disinfection adding device; 42. a dechlorination agent adding device; 43. a disinfection adding device; 44. a sludge disinfection adding device; 5. a lift pump; 6. a sterilizing pump; 7. a biological filler; 8. a blower; 9. an air mixer; 10. a sludge pump.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation.

In the description of the present embodiment, it should be noted that, directions or positional relationships indicated by terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "front", "rear", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience in describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element referred to has a specific direction, is configured and operated in a specific direction, and therefore, should not be construed as limiting the present utility model. The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, in one embodiment of the present utility model, a hospital wastewater treatment system is provided, comprising a pretreatment system 1, a secondary treatment system 2, a drainage system 3, and a feeding device 4.

Specifically, referring to fig. 1 and 2, the pretreatment system 1 includes a grill tank 11, a waste water lifting well 12, a pre-sterilization tank 13, and a septic tank 14, which are disposed in this order. Hospital wastewater flows into the grid pond 11 through a pipeline, a rotary grid machine 111 is arranged in the grid pond 11, sundries in the water are intercepted and collected by the rotary grid machine 111, and grid slag 112 is used as dangerous waste manual disinfection treatment and can be cleared and treated by a third party. The bottom of the waste water lifting well 12 is provided with a lifting pump 5, and the water filtered by the rotary grating machine 111 is lifted into a pre-disinfection tank 13 by the lifting pump 5 for pre-disinfection treatment and then enters a septic tank 14 for anaerobic fermentation.

Referring to fig. 1 to 3 and 5, the secondary treatment system 2 includes a regulating tank 21, a hydrolysis tank 22, an aerobic aeration tank 23, a sedimentation tank 24, and a disinfection tank 25 which are sequentially communicated. The regulating tank 21 is communicated with the septic tank 14, and the supernatant fluid of the septic tank 14 enters the regulating tank 21 to balance the water quantity, the water quality and the water temperature. The lifting pump 5 controlled by the liquid level controller is arranged in the regulating tank 21, and the water pump is automatically controlled to start and stop according to the liquid level, water is lifted into the hydrolysis tank 22 by the lifting pump 5, insoluble organic matters in the water are hydrolyzed into soluble organic matters under the action of a large number of hydrolytic bacteria and acidizing bacteria, and macromolecular matters difficult to biodegrade are converted into micromolecular matters easy to biodegrade, so that the biodegradability of the wastewater is improved.

The hydrolyzed wastewater automatically flows into an aerobic aeration tank 23, and organic matters are decomposed or are utilized by itself to proliferate or are directly converted into micromolecular matters such as carbon dioxide, water and the like through adsorption, oxidization and absorption conversion, ammonia nitrogen is converted into nitrate nitrogen, and the nitrate nitrogen is converted into nitrogen through mixed liquid reflux and denitrification under the action of heterotrophic bacteria in a biological membrane, so that the purpose of removing the organic matters and the ammonia nitrogen is achieved.

The reacted sewage automatically flows into a sedimentation tank 24 for solid-liquid separation, and the clear water in the sedimentation tank 24 flows into a disinfection tank 25 for disinfection. The sedimentation tank 24 is also communicated with a sludge tank 26 through a pipeline, and the sludge is discharged into the sludge tank 26 for storage and disinfection. The sludge tank 26 is internally provided with a liquid level control system and an out-of-standard alarm prompt, and is subjected to outward transport treatment by qualified third party companies to a certain extent.

Referring to fig. 4, the drainage system 3 includes a water collecting lift well 31 and a raschel tank 32 which are sequentially communicated, and an ultrasonic flowmeter 321 is arranged on the raschel tank 32 to measure the water flow of the treated external drainage. The water collecting lifting well 31 is communicated with the disinfection pond 25, a lifting pump 5 is arranged at the bottom of the water collecting lifting well 31, clean water after disinfection treatment of the disinfection pond 25 enters the water collecting lifting well 31 and is lifted to the Bauchi 32 through the lifting pump 5, the Bauchi 32 is communicated with a municipal pipe network, and the water after treatment is discharged into the municipal pipe network through detection of an online monitoring device.

Referring to fig. 1 to 4, the feeder 4 includes a pre-sterilization feeder 41, a dechlorination agent feeder 42, a sterilization feeder 43, and a sludge sterilization feeder 44. The pre-disinfection adding device 41 is communicated with the pre-disinfection tank 13 through a disinfection pump 6 and a pipeline, and 10% sodium hypochlorite disinfectant is added into the pre-disinfection tank 13 to contact with the wastewater for 1-2 h for pre-disinfection. The dechlorination agent adding device 42 is communicated with the septic tank 14 through the disinfection pump 6 and a pipeline, and when the waste water disinfected in the pre-disinfection tank 13 needs to detect residual chlorine and the residual chlorine content exceeds the standard, a reductive dechlorination agent (such as sodium bisulfite, sodium thiosulfate and the like) is added into the septic tank 14 through the dechlorination agent adding device 4 to perform dechlorination treatment. The dechlorination agent adding device 42 is also connected with the air stirrer 9 arranged outside and the water supply pipe through pipelines, and can be uniformly mixed in advance. The disinfection adding device 43 is communicated with the disinfection tank 25 through a disinfection pump 6 and a pipeline, and 10% sodium hypochlorite disinfectant is added into the disinfection tank 25 for re-disinfection. The sludge disinfection adding device 44 is communicated with the sludge tank 26 through a disinfection pump 6 and a pipeline, and adds 10% sodium hypochlorite disinfectant into the sludge tank 26 to disinfect the residual sludge so as to remove residual pathogenic microorganisms.

Referring to fig. 1 to 4, the emergency water tank 15, the regulating tank 21, the aerobic aeration tank 23, the sludge tank 26 and the dechlorination agent adding device 42 are provided with biological fillers 7 inside. The biological filler 7 can be selected from beam-shaped elastic three-dimensional fillers, provides carriers for the attachment growth of microorganisms, and the bacteria are attached and combined with each other on the surface of the fillers to form a biological film. Meanwhile, the biological filler 7 has the functions of cutting and blocking bubbles, so that the concentration of dissolved oxygen in the wastewater is improved, the transfer of microorganism organic matters and dissolved oxygen is enhanced, and the wastewater treatment efficiency can be improved. The emergency water tank 15, the regulating tank 21, the aerobic aeration tank 23 and the sludge tank 26 are respectively connected with a fan 8 arranged outside the emergency water tank through pipelines, so that the dissolved oxygen in the water body can be rapidly increased, and the requirement of microorganisms on oxygen can be met.

In another embodiment of the utility model, referring to fig. 1 and 2, a lift pump 5 is disposed within the waste lift well 12 and is in communication with an emergency water sump 15 via a pipe. The emergency water tank 15 is internally provided with a lifting pump 5 and is communicated with the waste water lifting well 12 through a pipeline. When the amount of wastewater in the wastewater lifting well 12 is large, the redundant wastewater can be lifted and transferred to the emergency water pool 15 for temporary storage through the lifting pump 5 in the wastewater lifting well 12; when the amount of wastewater in the wastewater lifting well 12 is lower than a set value, the temporarily stored wastewater can be transferred into the wastewater lifting well 12 by the lifting pump 5 in the emergency water tank 15 so as to ensure the continuity of subsequent wastewater treatment. In addition, the pre-disinfection adding device 41 is communicated with the emergency water tank 15 through the disinfection pump 6 and the pipeline, and 10% sodium hypochlorite disinfectant is added into the emergency water tank 15 to disinfect the emergency water tank.

In another embodiment of the present utility model, referring to fig. 4, the bottom of the sedimentation tank 24 is in a conical structure with the upper part thick and the lower part thin, so that the solid and the liquid in the sedimentation tank 24 can be rapidly separated, and the precipitated activated sludge is concentrated at the center of the bottom of the sedimentation tank 24. The bottom of the sedimentation tank 24 is provided with a sludge pump 10, and the sludge pump 10 is respectively connected with a sludge tank 26, a hydrolysis tank 22 and an aerobic aeration tank 23 through pipelines. The sludge in the sedimentation tank 24 is returned to the hydrolysis tank 22 and the aerobic aeration tank 23 by the sludge pump 10 at regular time, and the rest is discharged as surplus sludge into the sludge tank 26 for storage and disinfection.

In another embodiment of the present utility model, referring to fig. 1, in order to enhance the oxidative decomposition effect, the aerobic aeration tank 23 is divided into a primary biochemical tank 231 and a secondary biochemical tank 232. Wherein, the biological filler 7 in the primary biochemical tank 231 adopts a beam-shaped elastic three-dimensional filler, which is easy to form a film and is not blocked; the biological filler 7 in the secondary biochemical tank 232 adopts columnar biological carrier filler, and has large specific surface area and high biological load rate. The content of the biological filler 7 in the secondary biochemical pool 232 is higher than that of the biological filler 7 in the primary biochemical pool 231, and the biomass in the secondary biochemical pool 232 is kept higher, so that the aim of removing organic pollutants at high speed is fulfilled.

Referring to fig. 5, the process flow of the hospital wastewater treatment system provided by the present utility model includes, but is not limited to, the following steps: the hospital wastewater sequentially enters a wastewater lifting well after deslagging by a rotary grating machine, is lifted into a pre-disinfection tank by a lifting pump, is subjected to pre-disinfection treatment by adding disinfectant by a pre-disinfection adding device, flows into a septic tank for anaerobic fermentation, and is subjected to dechlorination treatment by adding dechlorination agent by a dechlorination agent adding device; then, the wastewater sequentially enters an adjusting tank, a hydrolysis tank, a primary biochemical tank and a secondary biochemical tank for hydrolysis, acidification and oxidative decomposition to be degradable micromolecular substances; the treated wastewater enters a sedimentation tank for solid-liquid separation, wherein the precipitated sludge is extracted into a hydrolysis tank, a primary biochemical tank or a sludge tank for treatment through a sludge pump, the supernatant enters a disinfection tank, and after disinfection treatment through adding disinfectant through a disinfection adding device, the supernatant flows into a water collecting lifting well, is lifted to a Baucher tank through a lifting pump and is discharged to a municipal pipe network.

The waste water treatment system is also connected with an external waste gas treatment system, waste gas generated in the waste water treatment process is collected and concentrated waste gas treatment is carried out, and the waste water treatment process adopts an upper air inlet and lower ventilation mode to avoid virus overflow.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Therefore, all technical solutions which are available to the person skilled in the art based on the prior art through logic analysis, reasoning or limited experiments according to the inventive concept are within the scope of protection defined by the claims.

Claims (10)

1. A hospital wastewater treatment system, which is characterized by comprising a pretreatment system (1), a secondary treatment system (2) and a drainage system (3);

the pretreatment system (1) comprises a grid pool (11), a waste water lifting well (12), a pre-disinfection pool (13) and a septic tank (14) which are sequentially communicated, hospital waste water flows into the grid pool (11) through a pipeline, and a rotary grid machine (111) is arranged in the grid pool (11);

the secondary treatment system (2) comprises an adjusting tank (21), a hydrolysis tank (22), an aerobic aeration tank (23), a sedimentation tank (24) and a disinfection tank (25) which are sequentially communicated, wherein the adjusting tank (21) is communicated with a septic tank (14), and the sedimentation tank (24) is communicated with a sludge tank (26) through a pipeline;

the drainage system (3) comprises a water collecting lifting well (31) and a Buchet tank (32) which are sequentially communicated, wherein the water collecting lifting well (31) is communicated with the disinfection tank (25), and the Buchet tank (32) is communicated with a municipal pipe network.

2. The hospital wastewater treatment system according to claim 1, characterized in that the bottoms of the wastewater lifting well (12), the regulating tank (21) and the water collecting lifting well (31) are respectively provided with a lifting pump (5), and the water in the wastewater lifting well (12) is lifted into the pre-disinfection tank (13) through the lifting pumps (5); the water in the regulating tank (21) is lifted into the hydrolysis tank (22) by the lifting pump (5), and the water in the water collecting lifting well (31) is lifted into the Bucherer tank (32) by the lifting pump (5).

3. A hospital wastewater treatment system according to claim 1, further comprising a feeding device (4), said feeding device (4) comprising a pre-disinfection feeding device (41), a dechlorinating agent feeding device (42), a disinfection feeding device (43) and a sludge disinfection feeding device (44);

the pre-disinfection adding device (41) is communicated with the pre-disinfection tank (13) through a disinfection pump (6) and a pipeline, the dechlorination agent adding device (42) is communicated with the septic tank (14) through the disinfection pump (6) and the pipeline, the disinfection adding device (43) is communicated with the disinfection tank (25) through the disinfection pump (6) and the pipeline, and the sludge disinfection adding device (44) is communicated with the sludge tank (26) through the disinfection pump (6) and the pipeline.

4. A hospital wastewater treatment system according to claim 3, characterized in that the wastewater lifting well (12) is internally provided with a lifting pump (5) and is communicated with an emergency water tank (15) through a pipeline, and the emergency water tank (15) is internally provided with the lifting pump (5) and is communicated with the wastewater lifting well (12) through a pipeline.

5. A hospital wastewater treatment system according to claim 4, characterized in that the pre-disinfection dosing device (41) is connected to the emergency water basin (15) via a disinfection pump (6) and a pipeline.

6. The hospital wastewater treatment system according to claim 4, wherein the emergency water tank (15), the regulating tank (21), the aerobic aeration tank (23), the sludge tank (26) and the dechlorinating agent adding device (42) are provided with biological fillers (7) inside.

7. The hospital wastewater treatment system according to claim 6, wherein the emergency water tank (15), the regulating tank (21), the aerobic aeration tank (23) and the sludge tank (26) are respectively connected with a fan (8) arranged outside the emergency water tank, the regulating tank, the aerobic aeration tank and the sludge tank through pipelines, the dechlorinating agent adding device (42) is connected with an air mixer (9) arranged outside the emergency water tank through pipelines, and the dechlorinating agent adding device (42) is connected with a running water main through pipelines.

8. The hospital wastewater treatment system according to claim 1, wherein the bottom of the sedimentation tank (24) is in a conical structure with a thick upper part and a thin lower part, the bottom of the sedimentation tank (24) is provided with a sludge pump (10), and the sludge pump (10) is respectively connected with the sludge tank (26), the hydrolysis tank (22) and the aerobic aeration tank (23) through pipelines.

9. The hospital wastewater treatment system according to claim 1, wherein the aerobic aeration tank (23) comprises a primary biochemical tank (231) and a secondary biochemical tank (232), the content of biological filler (7) in the secondary biochemical tank (232) is higher than that of biological filler (7) in the primary biochemical tank (231), the biological filler (7) in the primary biochemical tank (231) adopts beam-shaped elastic three-dimensional filler, and the biological filler (7) in the secondary biochemical tank (232) adopts columnar biological carrier filler.

10. A hospital wastewater treatment system according to claim 1, characterized in that an ultrasonic flow meter (321) is provided on the raschel tank (32).

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