Hospital sewage treatment device with ultraviolet catalysis coupled with ozone

Abstract

The utility model relates to the technical field of sewage treatment, and particularly discloses an ultraviolet catalysis and ozone coupled hospital sewage treatment device, which comprises a grating groove, a grating machine and a transfer pump, and is communicated with the grating groove, an ultraviolet-ozone reaction unit comprises a titanium oxide coating ultraviolet lamp, ozone catalysis composite filler and an ultraviolet-ozone tank, an outlet of the transfer pump is connected with a water inlet of the ultraviolet-ozone tank, the titanium oxide coating ultraviolet lamp and the ozone catalytic composite filler are arranged in the ultraviolet-ozone tank, the activated carbon tank and the composite activated carbon filler are connected with a water outlet of the ultraviolet-ozone tank, and the chemical coagulation tank and the chemical precipitation tank are arranged behind the activated carbon tank. A composite sewage treatment scheme is formed by integrating various technical means such as ultraviolet disinfection, ozone oxidation, activated carbon adsorption, chemical precipitation and the like. Compared with the prior art, the scheme can comprehensively solve various pollutants in hospital sewage, such as drug-resistant bacteria, viruses and organic matters, and ensures that the treatment effect is more comprehensive.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a hospital wastewater treatment device that uses ultraviolet catalysis coupled with ozone. Background Technology

[0002] Currently, hospital wastewater treatment technologies mainly employ physical, chemical, and biological methods, but these methods often have certain limitations and drawbacks. Common technical solutions include ultraviolet disinfection, ozone oxidation, activated carbon adsorption, and chemical precipitation.

[0003] 1. Ultraviolet (UV) Disinfection Technology: UV disinfection is commonly used in the disinfection stage of hospital wastewater treatment, effectively killing pathogenic microorganisms in the water, including bacteria and viruses. However, UV disinfection has a significant drawback: it is less effective at inactivating drug-resistant bacteria and viruses, and UV light can only kill microorganisms exposed in the water. For wastewater treatment in deeper or faster-flowing water, the sterilization effect of UV light is greatly reduced. Furthermore, UV equipment requires a high degree of water clarity; if the water is turbid, the effectiveness of UV irradiation will be affected.

[0004] 2. Ozone Oxidation Technology: Ozone, as a strong oxidant, can decompose organic matter and drug residues in water and has strong disinfection and sterilization functions. However, ozone oxidation technology has several problems in practical applications. First, ozone generation requires a large amount of energy, the equipment is complex, and the operation and maintenance costs are high; second, ozone is easily decomposed during treatment and cannot be sustained; and excessive use of ozone may lead to secondary pollution and produce byproducts such as chlorate.

[0005] 3. Activated Carbon Adsorption Technology: Activated carbon adsorption technology is commonly used to remove organic matter and drug residues from wastewater. Although activated carbon has a good adsorption effect on drugs and organic pollutants, its removal effect on microorganisms is poor, and it needs to be replaced or regenerated after adsorption saturation, increasing operating costs. In addition, activated carbon adsorption may have the problem of incomplete inactivation of bacteria and viruses, especially under conditions of significant water quality changes.

[0006] 4. Chemical Precipitation Technology: Chemical precipitation technology uses chemical agents to precipitate heavy metal ions, suspended solids, and some organic pollutants in water, thereby purifying the water. However, chemical precipitation often produces a large amount of sludge, which requires further treatment, and the use of chemical agents may also cause some secondary pollution.

[0007] The common drawbacks of existing technologies are that, when used individually, they are insufficient to effectively address the comprehensive removal of drug-resistant bacteria, viruses, and drug residues from hospital wastewater. Furthermore, different treatment methods lack synergy and cannot dynamically adjust to changes in water quality. In addition, many traditional methods suffer from high energy consumption, high operating costs, and delayed response to changes in water quality, failing to meet increasingly stringent hospital wastewater discharge standards.

[0008] Therefore, existing technical solutions need further improvement, optimization of processing procedures and equipment structure, and enhancement of synergy between different processing units to improve the overall effect of hospital wastewater treatment. Utility Model Content

[0009] This invention provides a hospital wastewater treatment device based on ultraviolet catalysis coupled with ozone, offering a more efficient, energy-saving, and real-time dynamic adjustment system for hospital wastewater treatment. This system comprehensively addresses the shortcomings of existing technologies, particularly in the removal of drug-resistant bacteria, viruses, and drug residues, exhibiting greater adaptability and stability.

[0010] The present invention solves the above-mentioned technical problems through the following technical solution:

[0011] A hospital wastewater treatment device using ultraviolet catalysis coupled with ozone, comprising:

[0012] The bar screen and the bar screen machine are used to remove large particulate impurities;

[0013] The transfer pump, connected to the bar screen, is used to transport the wastewater behind the bar screen to the ultraviolet-ozone reaction unit;

[0014] The ultraviolet-ozone reaction unit includes a titanium dioxide-coated ultraviolet lamp, an ozone catalytic composite packing material, and an ultraviolet-ozone tank. The outlet of the transfer pump is connected to the inlet of the ultraviolet-ozone tank. The titanium dioxide-coated ultraviolet lamp and the ozone catalytic composite packing material are placed inside the ultraviolet-ozone tank to synergistically generate ·OH free radicals and inactivate pathogens and degrade drug residues.

[0015] Activated carbon tank and composite activated carbon packing are connected to the outlet of the ultraviolet-ozone tank to adsorb organic matter and trace drug residues;

[0016] The chemical coagulation tank and chemical precipitation tank are located after the activated carbon tank and are used to add polyaluminum chloride and polyacrylamide and precipitate suspended solids.

[0017] Inclined tube packing and sludge discharge port are installed in the chemical sedimentation tank to intercept suspended solids and discharge sludge;

[0018] The contact oxidation tank and its aeration disc are connected to the effluent from the chemical sedimentation tank for biological contact oxidation.

[0019] MBR membrane and MBR tank: The MBR tank is set after the contact oxidation tank and is used for membrane bioreactors and solid-liquid separation.

[0020] The secondary disinfection tank and ultraviolet lamp are connected to the effluent of the MBR tank and are used for secondary ultraviolet disinfection.

[0021] In one specific embodiment, the ultraviolet-ozone reaction unit further includes a ceramic microporous aeration disc and an ozone generator. The ozone generator inputs ozone into the ultraviolet-ozone tank through the ceramic microporous aeration disc. The ozone exhaust gas destroyer is connected to the exhaust port of the ultraviolet-ozone tank for safe treatment of residual ozone.

[0022] In one specific embodiment, an automated control unit is also included. The automated control unit is electrically connected to the turbidity meter, dissolved oxygen meter, ORP meter and flow meter respectively, and automatically adjusts the operating parameters of the transfer pump, suction pump, sludge return pump and aeration blower according to the collected water quality and flow data.

[0023] In one specific embodiment, the turbidity meter is installed in the chemical precipitation tank for online monitoring of the turbidity of the effluent.

[0024] In a specific embodiment, the contact oxidation tank also includes a dissolved oxygen meter, an ORP meter, and a flow meter, which are respectively installed in the contact oxidation tank and pipelines to collect DO, ORP, and flow signals in real time; a suction pump, a sludge return pump, and an aeration blower are respectively connected to the MBR tank, the contact oxidation tank, and the aeration disc to adjust the hydraulic retention time, biochemical aeration intensity, and sludge return based on real-time monitoring signals; and elastic packing is installed in the contact oxidation tank to provide a carrier for microorganisms.

[0025] In one specific embodiment, the MBR membrane is a hollow fiber ultrafiltration membrane with a pore size in the range of 0.01–0.1 μm.

[0026] In one specific embodiment, the automation control unit incorporates a fuzzy PID control algorithm based on turbidity, DO, and ORP to dynamically optimize the coordinated operation of each processing unit.

[0027] The beneficial effects of this utility model are as follows: 1. Integration and coordination of multiple treatment units: One of the innovations of this patent is the integration of multiple treatment technologies such as ultraviolet disinfection, ozone oxidation, activated carbon adsorption, and chemical precipitation to form a comprehensive treatment solution capable of handling different water qualities and pollutants. This system can automatically adjust the working status of the treatment units according to real-time water quality to ensure maximum treatment effectiveness.

[0028] 2. Automated control system and real-time dynamic adjustment function: The unique real-time monitoring and dynamic adjustment function of this patent analyzes the real-time data of wastewater quality through the intelligent control system, and automatically adjusts the working status of each treatment unit to ensure the efficiency and stability of the treatment process.

[0029] 3. Energy-saving design and efficient ozone utilization technology: By optimizing the ozone utilization process, ozone waste is reduced, thus lowering energy consumption. Furthermore, the highly efficient design of the ultraviolet disinfection and activated carbon adsorption systems also significantly reduces the overall system's energy consumption. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 The diagram shown is a structural schematic of this utility model;

[0032] Figure 2 The diagram shown is a flow chart of the wastewater treatment process according to this utility model.

[0033] In the attached diagram: 1-Bar screen; 2-Bar screen machine; 3-Transfer pump; 4-Titanium oxide coated UV lamp; 5-Ozone catalytic composite packing; 6-UV-ozone tank; 7-Ceramic microporous aeration disc; 8-Ozone tail gas destroyer; 9-Ozone generator; 10-Activated carbon tank; 11-Composite activated carbon packing; 12-Chemical coagulation tank; 13-Chemical precipitation tank; 14-Inclined tube packing; 16-Turbidimeter; 17-Contact oxidation tank; 18-Aeration disc; 19-Secondary disinfection tank; 20-UV lamp; 21-MBR membrane; 22-MBR tank; 23-Dissolved oxygen meter; 24-ORP meter; 25-Suction pump; 26-Sludge return pump; 27-Flow meter; 28-Aeration blower. Detailed Implementation

[0034] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] Example 1

[0036] The following is in conjunction with the appendix Figure 1-2The present invention will be further described below, but this does not limit the scope of protection of the present invention.

[0037] In this embodiment, the overall design capacity of the device is 480 cubic meters per day (flow rate of 20 cubic meters per hour). Raw water enters the bar screen 1, where the bar screen machine 2 removes solid particulate impurities larger than 5 mm. The wastewater treated by the bar screen 1 is then transported to the ultraviolet-ozone reaction unit via a transfer pump 3. The transfer pump 3 has a rated flow rate of 20 cubic meters per hour and a head of 10 meters.

[0038] The UV-ozone reaction unit includes a titanium dioxide-coated UV lamp 4, an ozone catalytic composite packing 5, and a UV-ozone tank 6. The reaction tank has a volume of 1 cubic meter and is filled with ceramic microporous aeration discs 7 and metal oxide-supported porous ceramic catalytic composite packing 5, with a volume ratio of 50% and 40%, respectively.

[0039] Ozone is injected evenly into the UV-ozone tank 6 via a ceramic microporous aeration disc 7 from an ozone generator 9 at a concentration of 1.5 mg / L. Inside the tank, two 1.2-meter-long, 30-watt titanium dioxide-coated UV lamps 4 excite TiO2 to generate ·OH free radicals at an illuminance of 25 mW / cm², with a generation rate reaching 1.2 × 10⁻⁶. -5 Moles per liter per second (mol / L) are used to inactivate over 99.9% of common pathogens in hospital wastewater and degrade over 90% of drug residues (typical antibiotic concentration of 5 mg / L as an example). The exhaust gas from the UV-ozone tank 6 is treated by the ozone exhaust gas destroyer 8 before safe discharge.

[0040] After the reaction, the effluent enters the activated carbon tank 10, which is filled with composite activated carbon packing material 11. The contact time is approximately 10 minutes to adsorb any remaining organic matter and trace amounts of the drug. It then flows by gravity to the chemical coagulation tank 12, where 20 mg / L of polyaluminum chloride and 2 mg / L of polyacrylamide are added. After thorough mixing with a mechanical stirrer, the mixture enters the chemical sedimentation tank 13. The sedimentation tank 13 has a volume of 2 cubic meters and is equipped with inclined tube packing material 14. Sludge is discharged periodically (every 4 hours) through the sludge discharge port 15.

[0041] The effluent from the sedimentation process flows into the contact oxidation tank 17, which is filled with elastic packing material 29 at a volume fraction of 30% to provide a carrier for microorganisms. Aeration discs 18 are installed on the contact oxidation tank 17, with an aeration rate of 10 liters / m²·hour, supplied with air by an aeration blower 28. Simultaneously, dissolved oxygen meters 23, ORP meters 24, and flow meters 27 are installed on the tank body and effluent pipes to collect DO, ORP, and flow signals in real time. The system's automated control unit is also electrically connected to a turbidity meter 16, dynamically adjusting the speed of the aeration blower 28 and the return ratio of the sludge return pump 26 based on a fuzzy PID algorithm to maintain DO at 2.0 ± 0.2 mg / L and ORP at +150 ± 20 mV.

[0042] After contact oxidation, the water flows into the MBR tank 22, which is equipped with a hollow fiber ultrafiltration MBR membrane 21 with a pore size of 0.05 micrometers and a membrane aeration rate of 8 liters / square meter·hour. The ultrafiltration effluent is extracted by a suction pump 25, and the returned sludge is transported to the contact oxidation tank 17 by a sludge return pump 26, with the sludge return ratio controlled at 100%.

[0043] Finally, the effluent from MBR tank 22 enters secondary disinfection tank 19, where two titanium oxide-coated UV lamps (20 watts each) are installed. The secondary UV irradiation time is no less than 5 seconds, ensuring that the total bacterial count in the effluent is less than 100 CFU / mL and the turbidity is below 1.0 NTU, fully meeting the Class III surface water discharge standard. Throughout the process, the automated control unit records all monitoring data in real time and issues remote alarms, ensuring stable and reliable system operation.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A UV catalytic coupled ozone hospital sewage treatment device, characterized in that, It comprises: A grid slot (1) and a grid machine (2) arranged therein for removing large-particle impurities; A transfer pump (3) connected with the grid slot (1) for conveying sewage after the grid to the ultraviolet-ozone reaction unit; The ultraviolet-ozone reaction unit comprises a titanium oxide-coated ultraviolet lamp (4), ozone catalytic composite filler (5) and an ultraviolet-ozone tank (6), the outlet of the transfer pump (3) is connected with the water inlet of the ultraviolet-ozone tank (6), the titanium oxide-coated ultraviolet lamp (4) and the ozone catalytic composite filler (5) are arranged in the ultraviolet-ozone tank (6) for generating ·OH free radicals and inactivating pathogenic bacteria and degrading drug residues; An activated carbon tank (10) and composite activated carbon filler (11) connected with the water outlet of the ultraviolet-ozone tank (6) for adsorbing organic matter and trace drug residues; A chemical coagulation tank (12) and a chemical sedimentation tank (13) arranged after the activated carbon tank (10) for adding polyaluminum chloride and polyacrylamide and precipitating suspended solids; An inclined pipe filler (14) and a sludge discharge port (15) arranged in the chemical sedimentation tank (13) for intercepting suspended solids and discharging sludge; A contact oxidation tank (17) and its aeration disc (18), the contact oxidation tank (17) is connected with the water outlet of the chemical sedimentation tank (13) for biological contact oxidation; An MBR membrane (21) and an MBR tank (22), the MBR tank (22) is arranged after the contact oxidation tank (17) for membrane biological reaction and solid-liquid separation; A secondary disinfection tank (19) and an ultraviolet lamp (20), the secondary disinfection tank is connected with the water outlet of the MBR tank (22) for secondary ultraviolet disinfection.

2. The apparatus of claim 1, wherein, The ultraviolet-ozone reaction unit further comprises a ceramic microporous aeration disc (7) and an ozone generator (9), the ozone generator (9) inputs ozone to the ultraviolet-ozone tank (6) through the ceramic microporous aeration disc (7); an ozone tail gas destroyer (8) connected with the tail gas port of the ultraviolet-ozone tank (6) for safely processing residual ozone.

3. The apparatus of claim 1, wherein, It further comprises an automatic control unit, the automatic control unit is electrically connected with a turbidimeter (16), a dissolved oxygen meter (23), an ORP meter (24) and a flowmeter (27), and automatically adjusts the operation parameters of the transfer pump (3), a suction pump (25), a sludge backflow pump (26) and an aeration fan (28) according to the collected water quality and flow data.

4. The apparatus of claim 3, wherein, The turbidimeter (16) is arranged in the chemical sedimentation tank (13) for online monitoring of the turbidity of the effluent.

5. The apparatus of claim 1, wherein, The contact oxidation tank further comprises a dissolved oxygen meter (23), an ORP meter (24) and a flowmeter (27) arranged in the contact oxidation tank (17) and pipelines respectively for real-time acquisition of DO, ORP and flow signals; The suction pump (25), the sludge backflow pump (26) and the aeration fan (28) are connected with the MBR tank (22), the contact oxidation tank (17) and the aeration disc (18) respectively for adjusting the hydraulic retention time, biochemical aeration intensity and sludge backflow based on real-time monitoring signals; Elastic filler (29) is arranged in the contact oxidation tank (17) to provide a carrier for microorganisms.

6. The apparatus of claim 1, wherein, The MBR membrane (21) is a hollow fiber ultrafiltration membrane with a pore size in the range of 0.01-0.1 μm.

7. The apparatus of claim 3, wherein, The automation control unit is internally provided with a fuzzy PID control algorithm based on turbidity, DO and ORP, for dynamically optimizing the collaborative operation of each treatment unit.

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