Advanced treatment process equipment for medical wastewater

Abstract

The utility model relates to the technical field of sewage treatment, in particular to advanced treatment process equipment for medical wastewater, which comprises a tank body, a filter component and a disinfection tank, the tank body comprises a facultative zone, a micro-aerobic zone I, a micro-aerobic zone II, an aerobic zone and a settling zone which are sequentially communicated, and the upper layer of the tank body corresponding to the settling zone is connected with the input end of the filter component through a pipeline. The output end of the filter assembly is connected with the disinfection tank through a pipeline. The medical wastewater advanced treatment process equipment can be placed on a skid body to form a modular design due to the controllable volume, is convenient to transport and adjust, and is very flexible to use. The quality of discharged water can stably meet the limit value requirement of medical wastewater treatment, the method can be suitable for improving the environmental protection requirement in the future, the ceramic membrane is high in flux, long in service life and low in operation cost, the service life can reach 15 years or above, meanwhile, the catalytic function is achieved, emerging trace organic pollutants such as environmental hormones and residual antibiotics in water can be effectively removed under the synergistic effect of ozone, and the treatment effect is good. The removal rate is high.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a process equipment for deep treatment of medical wastewater. Background Technique

[0002] Medical wastewater is similar to general domestic sewage, but it has its prominent characteristics. In addition to containing the components of general domestic sewage, it also contains a large number of pathogenic microorganisms such as germs, infectious bacteria, viruses and parasites, and has characteristics such as acute infection and latent infection. In addition, medical wastewater also contains some harmful chemical pollutants such as drugs, antibiotics, disinfectants, anatomical waste, etc. Although the components of medical wastewater pollutants are complex and diverse, the concentration of conventional pollutants is low and the treatment technology is mature.

[0003] At present, the treatment of medical wastewater mostly focuses on the removal of pathogenic pollutants such as viruses and germs, and then discharges into the municipal pipe network for further treatment by urban sewage treatment plants. However, the treatment of substances such as drugs and antibiotics in the wastewater is ignored. Although the concentration of these substances is very low after entering the sewage treatment plant, the existing sewage treatment plants basically have no removal effect on such substances, and potential ecological risks and health risks will be generated after entering the natural water body. Content of the Utility Model

[0004] To solve the above problems, the utility model proposes a process equipment for deep treatment of medical wastewater, aiming to remove conventional pollutants in medical wastewater and have a high removal effect on new pollutants.

[0005] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0006] A process equipment for deep treatment of medical wastewater includes a pool body, a filtration component and a disinfection pool. The pool body includes an anoxic zone, a micro-aerobic zone I, a micro-aerobic zone II, an aerobic zone and a sedimentation zone which are connected in sequence. The upper layer of the pool body corresponding to the sedimentation zone is connected with the input end of the filtration component through a pipeline, and the output end of the filtration component is connected with the disinfection pool through a pipeline.

[0007] Preferably, a blower I is also installed at the pool body. The blower I has two gas output ends, and the two gas output ends are respectively arranged at the bottom of the anoxic zone and the aerobic zone.

[0008] Preferably, the sedimentation zone is connected with the disinfection pool through a pipeline.

[0009] Preferably, the filtration component includes a ceramic membrane, activated carbon and a clear water pool which are arranged in sequence according to the wastewater flow direction.

[0010] Preferably, the advanced treatment process equipment for medical wastewater further includes a blower II and an ozone generator. The output ends of the ozone generator and the blower are both connected to the ceramic membrane through pipelines.

[0011] Preferably, the advanced treatment process equipment for medical wastewater further includes a backwashing pump. The input end of the backwashing pump is connected to a clean water tank through a pipeline, and the output end of the backwashing pump is connected to the activated carbon and the ceramic membrane through a pipeline.

[0012] Preferably, the advanced treatment process equipment for medical wastewater further includes a chemical cleaning pump. The input end of the chemical cleaning pump is connected to a clean water tank through a pipeline, and the output end of the chemical cleaning pump is connected to the ceramic membrane through a pipeline.

[0013] Preferably, the advanced treatment process equipment for medical wastewater further includes a chemical additive device, which includes a medicine barrel, a chemical agent pump and a disinfection pump. The input ends of the chemical agent pump and the disinfection pump are connected to the medicine barrel through pipelines. The output end of the chemical agent pump is connected to the ceramic membrane through a pipeline, and the output end of the disinfection pump is connected to a disinfection tank;

[0014] The medicine barrel contains sodium hypochlorite solution.

[0015] Preferably, the particle size range of the ceramic particles of the ceramic membrane is 65 nm to 650 nm, the average diameter of the pore channels of the ceramic membrane is 10 nm to 100 nm, the material of the ceramic particles is metal oxide ceramic, and a catalyst is attached to the surface of the ceramic membrane.

[0016] Preferably, a sludge recovery pump is arranged in the sedimentation area, and the output end of the sludge recovery pump is connected to the anoxic area through a pipeline.

[0017] The beneficial effects of using the present utility model are as follows:

[0018] Since the volume of the advanced treatment process equipment for medical wastewater is controllable, it can be placed on a skid to form a modular design, which is convenient for transportation and adjustment and very flexible to use. The effluent quality can stably meet the limit requirements for medical wastewater treatment and can be applicable to the improvement of future environmental protection requirements. The ceramic membrane has a high flux and a long service life, up to more than 15 years, with low operating costs. At the same time, it has a catalytic function and can effectively remove emerging trace organic pollutants in water, such as environmental hormones and residual antibiotics, with a high removal rate under the synergistic effect of ozone. This equipment has a high degree of automation, can realize remote data transmission warning and process control, with low labor costs and convenient operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the advanced treatment process equipment for medical wastewater of the present utility model.

[0020] The reference numerals include:

[0021] 11 - Anoxic zone, 12 - Micro - aerobic zone I, 13 - Micro - aerobic zone II, 14 - Aerobic zone, 15 - Blower I, 16 - Sedimentation zone, 17 - Ceramic membrane, 18 - Activated carbon, 19 - Clear water tank, 20 - Disinfection tank, 21 - Ozone generator, 22 - Blower II, 23 - Backwash pump, 24 - Chemical cleaning pump, 25 - Chemical agent pump, 26 - Chemical agent cartridge, 27 - Disinfection pump, 28 - Sludge treatment system. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the present technical solution clearer and more understandable, the present technical solution will be further described in detail below in combination with the specific implementation manners. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present technical solution.

[0023] As Figure 1 shown, this embodiment proposes a deep - treatment process equipment for medical wastewater, including a pool body, a filtration component, and a disinfection tank 20. The pool body includes an anoxic zone 11, a micro - aerobic zone I 12, a micro - aerobic zone II 13, an aerobic zone 14, and a sedimentation zone 16 that are connected in sequence. The anoxic zone 11, the micro - aerobic zone I 12, the micro - aerobic zone II 13, and the aerobic zone 14 form an OAAO system. The upper layer of the pool body corresponding to the sedimentation zone 16 is connected to the input end of the filtration component through a pipeline, and the output end of the filtration component is connected to the disinfection tank 20 through a pipeline. In this embodiment, the filtration component includes a ceramic membrane 17, activated carbon 18, and a clear water tank 19 arranged in sequence along the wastewater flow direction. A blower I 15 is also installed at the pool body. The blower I 15 has two gas output ends, and the two gas output ends are respectively arranged at the bottom of the anoxic zone 11 and the aerobic zone 14. The sedimentation zone 16 is connected to the disinfection tank 20 through a pipeline. The deep - treatment process equipment for medical wastewater further includes a blower II 22 and an ozone generator 21. The output end of the ozone generator 21 and the output end of the blower are both connected to the ceramic membrane 17 through pipelines.

[0024] The deep - treatment process equipment for medical wastewater further includes a backwash pump 23, a chemical cleaning pump 24, and a chemical agent adding device. The input end of the backwash pump 23 is connected to the clear water tank 19 through a pipeline, and the output end of the backwash pump 23 is connected to the activated carbon 18 and the ceramic membrane 17 through pipelines. The input end of the chemical cleaning pump 24 is connected to the clear water tank 19 through a pipeline, and the output end of the chemical cleaning pump 24 is connected to the ceramic membrane 17 through a pipeline. The chemical agent adding device includes a chemical agent cartridge 26, a chemical agent pump 25, and a disinfection pump 27. The input ends of the chemical agent pump 25 and the disinfection pump 27 are connected to the chemical agent cartridge 26 through pipelines. The output end of the chemical agent pump 25 is connected to the ceramic membrane 17 through a pipeline, and the output end of the disinfection pump 27 is connected to the disinfection tank 20; the chemical agent cartridge 26 contains sodium hypochlorite solution.

[0025] The particle size range of the ceramic particles of the ceramic membrane 17 is 65 nm to 650 nm, the average diameter of the pore channels of the ceramic membrane 17 is 10 nm to 100 nm, the material of the ceramic particles is metal oxide ceramic, and a catalyst is attached to the surface of the ceramic membrane 17.

[0026] A sludge recovery pump is arranged in the precipitation area 16, and the output end of the sludge recovery pump is connected to the anoxic area 11 through a pipeline.

[0027] The following is a detailed description of this equipment. Since the volume of this equipment is controllable, it can be placed on a skid to form a modular design, which is convenient for transportation and adjustment and is very flexible to use. The pool body is provided with two water inlets, one is the raw water inlet and the other is the advanced treatment water inlet, which can switch between the two functions of raw water treatment and advanced treatment. The raw water is pumped into the biochemical system or the ceramic membrane 17 by the raw water lift pump to realize the water inlet of the treatment equipment.

[0028] The ceramic membrane 17 is arranged in the ozone ceramic membrane 17 pool. The ozone ceramic membrane 17 pool includes a ceramic membrane module, a water production pump, a backwash pump 23, a blower, an ozone generator 21, a gas-liquid mixing pump, a gas release device and a cooling water pump; the catalytic nano-flat ceramic membrane 17 undergoes an advanced catalytic oxidation reaction with ozone, which can intercept macromolecular pollutants and efficiently remove new pollutants; the backwash pump 23 is used for the water backwashing of the ceramic membrane 17 to relieve membrane fouling, and the blower II 22 provides a gas source for the gas scrubbing of the ceramic membrane 17.

[0029] The activated carbon 18 is arranged in the biological activated carbon 18 pool, and the pool contains filter plates, long-stem filter heads and activated carbon 18; the equipment includes a backwash pump 23, and the backwash pump 23 is used for the water backwashing of the activated carbon 18. Sodium hypochlorite solution is placed in the cartridge 26, and the chemical agent pump 25 can pump the chemical agent into the pipeline and mix it with the clear water output by the chemical washing pump 24 for disinfecting the disinfection pool 20 and chemically cleaning the ceramic membrane 17.

[0030] The above-mentioned OAAO pool body, sedimentation tank, ozone ceramic membrane 17 pool, activated carbon 18 pool, clear water pool 19, as well as the cooling water buckets and equipment rooms required for maintenance, serve as the containers of the reaction pool body and the space for placing equipment.

[0031] The pool used in this device is provided with an overflow port and a drain port. The anoxic zone 11, micro-aerobic zone I, micro-aerobic zone II and aerobic zone 14 are connected by pipelines, and the bottoms of each zone are connected by means of opening holes. The anoxic zone 11 is provided with a raw water inlet, an aeration pipe is arranged in the pool, and an on-line DO meter and an on-line ORP meter are installed. Submersible mixers are arranged in the micro-aerobic zone I 12 and the micro-aerobic zone II 13 for pushing the flow. An aeration pipe, biological fillers are loaded and an on-line MLSS meter is installed in the pool where the aerobic zone 14 is located. The precipitation system includes a inclined tube sedimentation tank body, inclined tubes and a sludge return pump. The inclined tube sedimentation tank body includes a sludge return zone and an inclined tube zone, and the inclined tubes are installed in the inclined tube zone of the inclined tube sedimentation tank. The particle size range of the ceramic particles of the above-mentioned ceramic membrane 17 is 65-650 nm, the average diameter of the pore channels is 10-100 nm, the material of the ceramic particles is metal oxide ceramic, and a catalyst is attached to the surface of the ceramic membrane 17. The ceramic membrane 17 can be regarded as a ceramic membrane module, which is a container provided with an outlet formed by the above-mentioned ceramic membrane 17.

[0032] The ceramic membrane module can further form an ozone ceramic membrane system, including a pool body, a nano-ceramic membrane module, an ozone generation system, an ozone aeration system, a membrane backwashing system, a membrane chemical cleaning system, a water inlet and a water outlet pipeline. The water inlet is a deep treatment water inlet, which can meet the requirements of different water inlet tests. The pool body needs to be painted with anti-ozone paint. The shell material of the membrane module in the ceramic membrane system is 304 stainless steel, and the membrane sheet of the ceramic membrane 17 is nano-ceramic material.

[0033] The ozone generation system includes an ozone generator 21, an ozone concentration meter, a gas-liquid mixing pump, an ozone aeration system and a circulating water cooling system. The ozone generator 21 is used to generate ozone with an appropriate concentration. An ozone concentration meter is arranged in the pool body, and the ozone concentration meter is used to display the ozone concentration indication number generated by the ozone generator 21. The ozone aeration system is a high-pressure gas release device, and the gas introduced is dissolved ozone. The circulating water cooling system includes a cooling water bucket and a cooling water pump for cooling the ozone generator 21. The membrane backwashing system includes daily water backwashing and air scrubbing of the ceramic membrane module. When the membrane of the ceramic membrane module is seriously polluted, membrane chemical cleaning is carried out. The ozone aeration device is installed relative to the ceramic membrane module at a position close to the bottom of the pool body, and the ceramic membrane module is installed above the ozone aeration device; the ozone ceramic membrane system can filter the wastewater through the surface of the above-mentioned ceramic membrane module and discharge it from the outlet of the ceramic membrane module to the activated carbon 18 filtration system.

[0034] In the present utility model, the activated carbon 18 filtration system includes a water distribution system, a supporting layer, a filter material layer and a clear water layer. The water distribution system is provided with a filter plate and long-stem filter heads. The supporting layer is provided with cobblestones as a cushion layer, the filter material layer is filled with activated carbon 18, and the clear water layer is the clear water after the water passes through the activated carbon 18 layer from bottom to top.

[0035] In this utility model, the disinfection system includes a chemical addition tank and a chemical addition pump. The chemical tank is used to store sodium hypochlorite agent, which is used as the agent for the membrane chemical cleaning system and the disinfection system.

[0036] Generally speaking, the medical wastewater flows into the regulation tank by gravity for homogenization and equalization of quantity, and then is transported to the OAAO system under the action of the lift pump. Through precise control technology, the dissolved oxygen concentration in different process sections can be accurately controlled in a stepped manner, and nitrogen and phosphorus removal are carried out successively, significantly improving the removal efficiency of TN and TP. Specifically, under the micro-aerobic state, symbiotic bacteria are formed to achieve the synchronous removal of organic matter (as the electron donor) and nitrogen and phosphorus (as the electron acceptor). The OAAO system uses an anaerobic nitrification-denitrification process for precise control of nitrogen removal, and a phosphorus-reducing bacterium is used in the phosphorus removal process to reduce phosphate to gaseous substances such as phosphine for removal. The excess sludge is internally recycled and converted into a carbon source to meet the carbon source demand in the nitrogen and phosphorus removal process, greatly reducing the discharge of organic sludge and finally achieving sludge reduction. In addition, the sedimentation area 16 is connected to the sludge treatment system 28 through a pipeline, and the pipeline is regularly opened for sewage discharge.

[0037] The biochemical effluent of the OAAO system enters the ozone ceramic membrane reaction tank after passing through the sedimentation system. The ozone and the ceramic membrane 17 are integrated into a treatment unit, enabling ozone to not only undergo oxidation reactions in the membrane tank water body but also enter the nano-sized membrane pore channels to undergo catalytic oxidation reactions. Due to the shortening of the mass transfer distance and the increase in the concentration gradient within the membrane pores, the efficiency of the catalytic ozonation reaction occurring therein will be significantly improved, and the utilization efficiency of ozone will be significantly improved. While removing traditional organic pollutants, pollutants such as antibiotics, special drugs, and hormones that cannot be removed in the traditional process can be efficiently removed. In this process, ozone and the ceramic membrane 17 not only directly remove organic matter, but more importantly, significantly improve the biodegradability of organic matter in water, enabling the subsequent biological activated carbon 18 to effectively remove the small-molecule organic matter generated by oxidation decomposition. In addition, the ceramic membrane 17 can also remove suspended particles in water. The dual action of ozone and the ceramic membrane 17 can play a role in sterilization and intercepting microorganisms, and there are basically no pathogenic microorganisms and Escherichia coli in the effluent of the ceramic membrane 17.

[0038] The effluent of the ozone ceramic membrane reaction tank enters the biological activated carbon 18 filter tank to further remove the remaining pollutants. The effluent enters the contact disinfection tank 20, where sodium hypochlorite is added for thorough sterilization to ensure the safety of the effluent.

[0039] The above content is only the preferred embodiment of this utility model. For those of ordinary skill in the art, based on the idea of this technical content, many changes can be made in the specific implementation methods and application scopes. As long as these changes do not deviate from the concept of this utility model, they all fall within the protection scope of this patent.

Claims

1. A deep treatment process equipment for medical wastewater, characterized in that: It includes a pool body, a filtration component and a disinfection pool. The pool body includes an anoxic zone, a micro-oxic zone I, a micro-oxic zone II, an aerobic zone and a sedimentation zone that are connected in sequence. The upper layer of the pool body corresponding to the sedimentation zone is connected to the input end of the filtration component through a pipeline, and the output end of the filtration component is connected to the disinfection pool through a pipeline; The filtration component includes a ceramic membrane, activated carbon and a clean water pool arranged in sequence along the wastewater flow direction; The medical wastewater advanced treatment process equipment further includes a blower II and an ozone generator. The output ends of the ozone generator and the blower are both connected to the ceramic membrane through pipelines.

2. The deep treatment process equipment for medical wastewater according to claim 1, wherein: A blower I is also installed at the pool body. The blower I has two gas output ends, and the two gas output ends are respectively arranged at the bottom of the anoxic zone and the aerobic zone.

3. The medical wastewater advanced treatment process equipment according to claim 1, characterized in that: The sedimentation zone is connected to the disinfection pool through a pipeline.

4. The medical wastewater advanced treatment process equipment according to claim 1, characterized in that: The medical wastewater advanced treatment process equipment further includes a backwash pump. The input end of the backwash pump is connected to the clean water pool through a pipeline, and the output end of the backwash pump is connected to the activated carbon and the ceramic membrane through pipelines.

5. The medical wastewater advanced treatment process equipment according to claim 1, characterized in that: The medical wastewater advanced treatment process equipment further includes a chemical cleaning pump. The input end of the chemical cleaning pump is connected to the clean water pool through a pipeline, and the output end of the chemical cleaning pump is connected to the ceramic membrane through a pipeline.

6. The deep treatment process equipment for medical wastewater according to claim 1, characterized in that: The medical wastewater advanced treatment process equipment further includes a chemical addition device. The chemical addition device includes a medicine barrel, a chemical pump and a disinfection pump. The input ends of the chemical pump and the disinfection pump are connected to the medicine barrel through pipelines. The output end of the chemical pump is connected to the ceramic membrane through a pipeline, and the output end of the disinfection pump is connected to the disinfection pool; The medicine barrel contains sodium hypochlorite solution.

7. The deep treatment process equipment for medical wastewater according to claim 1, characterized in that: The particle size range of the ceramic particles of the ceramic membrane is 65 nm to 650 nm, the average diameter of the pore channels of the ceramic membrane is 10 nm to 100 nm, the material of the ceramic particles is metal oxide ceramic, and a catalyst is attached to the surface of the ceramic membrane.

8. The deep treatment process equipment for medical wastewater according to claim 1, characterized in that: A sludge recovery pump is arranged in the sedimentation zone. The output end of the sludge recovery pump is connected to the anoxic zone through a pipeline.

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