A device for synergistically treating antibiotic wastewater by low-temperature plasma combined with ozone aeration and a method for using the same

Abstract

The application relates to a low-temperature plasma combined ozone aeration synergistic wastewater treatment device and a use method thereof. The device comprises a wastewater circulating treatment device, a gas recycling device, a dielectric barrier discharge plasma generating device and a base support; the wastewater circulating treatment device comprises a treatment pool and a water storage tank; the treatment pool comprises an upper water storage pool and a lower aeration pool; the gas recycling device comprises a gas collecting cover; and the base support is composed of two supporting columns. The low-temperature plasma combined ozone aeration synergistic wastewater treatment device can collect ozone and re-introduce the ozone into a reactor system, improve treatment efficiency, realize the combination of plasma and ozone aeration, synergistically circulate and treat wastewater containing organic matters, and greatly enhance the treatment efficiency and treatment effect of the wastewater.

Description

Technical Field

[0001] This invention relates to a wastewater treatment device and its method of use that combines low-temperature plasma with ozone aeration, belonging to the field of wastewater treatment technology. Background Technology

[0002] In recent years, antibiotics and their environmental transformation products have been frequently detected in water and soil due to their widespread use, drawing global environmental attention. The presence of these emerging pollutants, particularly their prevalent detection in surface water and agricultural soils, exposes the problems of antibiotic overuse and improper disposal. The accumulation of antibiotics in the environment leads to direct toxic effects on aquatic organisms and plants. More seriously, even low concentrations of antibiotics can induce the development of antibiotic-resistant bacteria and resistance genes, increasing the risk of global spread of antibiotic resistance. In 2006, antibiotic resistance genes were identified as an emerging pollutant and considered by the World Health Organization as a major challenge threatening future biological health. Antibiotic pollution and its potential harm to ecology and human health have attracted widespread scientific and public attention. Research emphasizes the need for improvements in the management and disposal of antibiotic-containing wastewater and solid waste to mitigate the impact of antibiotics on the environment and ecosystems.

[0003] It is worth noting that most residual antibiotics in water bodies are difficult to degrade, increasing the difficulty of improving water quality. Therefore, researching how to comprehensively and efficiently apply different wastewater treatment technologies to degrade antibiotic pollutants in water bodies has become a task of significant research importance. Future research needs to focus on more advanced and environmentally friendly treatment technologies to effectively overcome the challenges of organic wastewater treatment. This may include biodegradation, the use of novel catalysts, and advanced physicochemical treatment methods. Promoting technological innovation and sustainable development in the field of antibiotic organic wastewater treatment will be an important direction for future research.

[0004] Traditional wastewater treatment technologies primarily encompass physical, chemical, and biological methods. Physical methods utilize adsorption properties, such as ion exchange, membrane separation, and adsorption technology, to separate and remove pollutants using adsorbents like activated carbon. Chemical methods mainly include chlorination and advanced oxidation processes, such as ozone oxidation, electrochemical oxidation, photocatalytic oxidation, and Fenton oxidation. Biological methods involve the assimilation of microorganisms to produce harmless small molecules, including biofilm methods, aerobic biological treatment, and anaerobic biological treatment. The combined application of these methods can effectively treat antibiotic pollutants in wastewater.

[0005] Dielectric barrier discharge (DBD) is a cryogenic plasma technology that introduces an insulating dielectric between electrodes. By providing a sufficient potential difference, a high electric field is formed at the bottom of the dielectric by the high-voltage electrode, achieving stable plasma generation at relatively low temperatures. During DBD, ozone, hydroxyl radicals, oxygen radicals, and other reactive substances are generated. These substances are highly reactive and react directly or indirectly with organic pollutants. DBD, as the simplest and most common type of cryogenic plasma technology, offers significant economic and environmental benefits, exhibiting excellent stability and reproducibility. It is widely used in the removal of volatile organic compounds (VOCs) and wastewater treatment, particularly in organic wastewater treatment. Ozone (O3) is a strong oxidant that reacts with inorganic and organic pollutants in water, breaking them down into smaller, simpler molecules. This oxidative degradation effectively removes various organic substances from antibiotic wastewater, including recalcitrant fluorinated compounds. Furthermore, ozone has bactericidal and disinfectant properties, effectively inactivating bacteria, viruses, and other microorganisms in water. In summary, the role of ozone in advanced oxidation processes makes it an effective technology widely used in water treatment. The ozone produced during the DBD process has a relatively short lifespan in the air, typically ranging from a few minutes to tens of minutes. Part of it reacts with organic matter in the water, being reduced to oxygen and water. However, a significant portion of the ozone still escapes into the air and eventually decomposes, resulting in ozone loss.

[0006] Therefore, designing a comprehensive reaction device that collects the ozone generated during the plasma reaction and re-aerates it in the reaction system for the degradation of antibiotic pollutants in wastewater has broad application prospects. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a wastewater treatment device combining low-temperature plasma and ozone aeration, along with its usage method. The device provided by this invention can collect ozone generated in the reactor during the plasma reaction and re-aerate it into the reaction system, thereby achieving ozone recycling. This significantly reduces environmental impact and improves ozone utilization and degradation efficiency of the reaction system.

[0008] The technical solution of the present invention is as follows:

[0009] A wastewater treatment device combining low-temperature plasma and ozone aeration includes a wastewater recycling device, a gas recycling device, a dielectric barrier discharge plasma generator, and a base support.

[0010] The wastewater recycling treatment device includes a treatment tank and a storage tank. The treatment tank includes an upper storage tank and a lower aeration tank. The upper storage tank is located above the lower aeration tank, and its area is smaller than that of the lower aeration tank, forming an overflow inlet on one side. A reaction tank composed of an inlet baffle and an outlet baffle is arranged in the center of the upper storage tank. A ceramic plate loaded with a photocatalyst is arranged inside the reaction tank. The upper storage tank is connected to the storage tank through an outlet hose, and the storage tank is connected to the lower aeration tank through an inlet hose. A peristaltic pump is installed on the inlet hose. The upper storage tank, the storage tank, the inlet hose, the peristaltic pump, and the lower aeration tank constitute a wastewater treatment cycle.

[0011] The gas recycling device includes a gas collection hood, which is connected to the aeration stone located at the bottom of the lower aeration tank via a gas collection hose, and an air pump is installed on the gas collection hose.

[0012] The base support consists of two support columns. The wastewater circulation treatment device is fixed between the two support columns of the base support. The dielectric barrier discharge plasma generator is located directly above the reaction tank and is fixed above the two support columns of the base support. After the gas collection hood covers the wastewater circulation treatment device and the dielectric barrier discharge plasma generator, it is fixed above the two support columns of the base support.

[0013] According to a preferred embodiment of the present invention, the lower aeration tank is provided with 45° inclined plates, and the number of inclined plates is 4 to 6. The purpose of these inclined plates is to increase the contact surface area between the air bubbles and the water, control the flow rate, make the water flow more uniform, make the gas easier to dissolve in the water, and make the aeration more complete.

[0014] According to a preferred embodiment of the present invention, the water in the lower aeration tank flows into the reaction tank in the upper water storage tank through the overflow inlet. The height of the inlet baffle and the outlet baffle is lower than that of the baffles around the upper water storage tank, and the height of the outlet baffle is lower than that of the inlet baffle, so as to prevent water from overflowing the upper water storage tank and to keep the liquid level in the upper water storage tank at a stable height.

[0015] According to a preferred embodiment of the present invention, the aeration stone is made of ceramic. It possesses high hardness and corrosion resistance. Ceramic aeration stones typically generate uniform and minute bubbles and are positioned 3.5 cm from the inlet of the lower aeration tank.

[0016] According to a preferred embodiment of the present invention, the gas collection hood is made of acrylic sheet with a thickness of 3mm, and the gas collection port is located at the lower part of the gas collection hood, which can effectively collect the ozone generated by the reaction through an air pump.

[0017] According to a preferred embodiment of the present invention, the dielectric barrier discharge plasma generator includes a quartz plate holder, which consists of two mounting bases and a top plate; a high-voltage terminal is provided at the center of the upper surface of the top plate, an aluminum heat sink is provided below the top plate, a stainless steel electrode is provided below the aluminum heat sink, and a quartz plate is provided below the stainless steel electrode.

[0018] Preferably, locking screws are installed on both sides of the quartz plate holder. By adjusting the locking screws, the position of the stainless steel electrode and the quartz plate can be adjusted, thereby effectively changing the height of the dielectric barrier discharge plasma generator from the upper surface of the wastewater to be treated.

[0019] More preferably, the high-voltage terminal is connected to an external power source; the external power source is a modulated pulse plasma power source.

[0020] More preferably, the surface area of ​​the quartz plate is larger than that of the stainless steel electrode, and the shape is rectangular with a length:width ratio of 8:5.

[0021] More preferably, the stainless steel electrode is rectangular in shape, with a length:width ratio of 5:2. The size of the lower surface area of ​​the stainless steel electrode determines the discharge region of the dielectric barrier discharge plasma generator, and the discharge intensity of the stainless steel electrode can be changed by altering the input power of the power supply.

[0022] The operating steps for using the above-mentioned low-temperature plasma combined with ozone aeration synergistic wastewater treatment device are as follows:

[0023] (1) Add the antibiotic-containing wastewater to the storage tank, start the peristaltic pump, and pump the wastewater to be treated into the lower aeration tank. When the height of the wastewater to be treated in the lower aeration tank is higher than the inlet baffle, it will enter the reaction tank through the overflow inlet.

[0024] (2) Adjust the dielectric barrier discharge plasma generator so that the height of the quartz plate from the upper surface of the wastewater to be treated is 1~4cm. Then place the gas collection hood above the dielectric barrier discharge plasma generator and the wastewater circulation treatment device to cover them. The wastewater to be treated in the reaction tank is treated by the dielectric barrier discharge plasma generator. At the same time, the ozone generated during the treatment process is recovered into the gas collection hood by the air pump and circulated in the reaction tank to achieve low temperature plasma combined with ozone aeration and cyclic treatment.

[0025] (3) The antibiotic wastewater treated in the reaction tank is returned to the storage tank and then pumped into the lower aeration tank for circulation treatment, so as to obtain clean water after the removal of organic matter for discharge or reuse.

[0026] According to a preferred embodiment of the present invention, in step (3), the cycle treatment time is determined based on the volume of antibiotic wastewater being treated and the concentration of antibiotics, and the treated clean water is located in a storage tank.

[0027] Beneficial effects:

[0028] 1. The low-temperature plasma combined with ozone aeration synergistic treatment device for antibiotic wastewater provided by this invention can collect ozone and reintroduce it into the reactor system, enabling ozone recycling and effectively increasing the efficiency of ozone utilization in the reaction, reducing waste, and improving treatment efficiency. Simultaneously, by collecting and reusing ozone, this device reduces additional ozone consumption and the possibility of unused ozone being released into the environment, thus mitigating the impact on the surrounding environment. Furthermore, this invention combines plasma and ozone aeration for synergistic and cyclical treatment of antibiotic-containing wastewater, significantly enhancing the treatment efficiency and effectiveness.

[0029] 2. The low-temperature plasma combined with ozone aeration synergistic wastewater treatment device provided by this invention can control the ozone concentration, ensure the stability of wastewater treatment, optimize reaction conditions, and improve reaction efficiency. Furthermore, compared to ordinary horizontal flow inlet tanks, this device adds inclined plates to the lower aeration tank. This increases the contact surface area between air bubbles and water, making the gas more easily dissolve in the water, which helps improve the aeration effect. It also avoids localized accumulation of air bubbles in the aeration tank, reduces the blockage effect of air bubbles, and ensures a more uniform distribution of gas throughout the water body, further enhancing the treatment efficiency and effect of antibiotic-containing wastewater.

[0030] 3. The low-temperature plasma combined with ozone aeration synergistic treatment device for antibiotic wastewater of the present invention has a simple structure, is easy to operate, and is suitable for widespread use.

[0031] 4. The present invention provides a device for the synergistic treatment of antibiotic wastewater using low-temperature plasma combined with ozone aeration. The device employs a ceramic plate loaded with a photocatalyst, which not only significantly improves the degradation efficiency of organic pollutants in the wastewater but also enhances the energy utilization rate of the system. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the low-temperature plasma combined with ozone aeration synergistic treatment device for antibiotic wastewater according to the present invention.

[0033] Figure 2 This is a front view of the dielectric barrier discharge plasma generator and the gas collection hood in the low-temperature plasma combined with ozone aeration synergistic treatment device for antibiotic wastewater of the present invention.

[0034] Figure 3This is a front view of the base support and wastewater recycling device in the low-temperature plasma combined with ozone aeration synergistic treatment device for antibiotic wastewater of the present invention.

[0035] Figure 4 This is a left view of the device for synergistic treatment of antibiotic wastewater using low-temperature plasma combined with ozone aeration, according to the present invention.

[0036] Figure 5 This is a three-dimensional structural diagram of the dielectric barrier discharge plasma generator of the present invention.

[0037] Figure 6 The diagram shows the degradation of moxifloxacin wastewater under the treatment of the apparatus described in Example 2 and the apparatus in Comparative Example 1.

[0038] Figure 7 The diagram shows the degradation of marbofloxacin wastewater under the treatment of the apparatus described in Example 2 and the apparatus in Comparative Example 1.

[0039] Figure 8 The diagram shows the degradation of ofloxacin wastewater under the treatment of the apparatus described in Example 2 and the apparatus in Comparative Example 1.

[0040] In the diagram: 1. Gas collection hood, 2. Gas collection hose, 3. Air pump, 4. Aeration stone, 5. High-voltage terminal, 6. Quartz plate fixing bracket, 7. Locking screw, 8. Aluminum radiator, 9. Stainless steel electrode, 10. Quartz plate, 11. Inlet hose, 12. Peristaltic pump, 13. Lower aeration tank, 14. Inclined plate, 15. Inlet baffle, 16. Outlet baffle, 17. Ceramic plate, 18. Upper water storage tank, 19. Base bracket, 20. Water storage tank, 21. Outlet hose, 22. Reaction tank, 23. Overflow inlet. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings, so that its objectives, advantages and technical solutions will be clearer, but should not be construed as limiting the present invention.

[0042] Example 1

[0043] like Figures 1-5 As shown, a wastewater treatment device combining low-temperature plasma and ozone aeration includes a wastewater recycling device, a gas recycling device, a dielectric barrier discharge plasma generator and a base support 19.

[0044] The wastewater recycling treatment device includes a treatment tank and a storage tank 20; the treatment tank includes an upper water storage tank 18 and a lower aeration tank 13. The upper water storage tank 18 is located above the lower aeration tank 13, and the area of ​​the upper water storage tank 18 is smaller than that of the lower aeration tank 13, forming an overflow inlet 23 on one side; an outlet is provided on the side of the upper water storage tank 18, and an inlet is provided below the lower aeration tank 13.

[0045] The upper water storage tank 18 has a reaction tank 22 in the center, which is composed of an inlet baffle 15 and an outlet baffle 16. A ceramic plate 17 loaded with a photocatalyst is installed in the reaction tank 22. The outlet of the upper water storage tank 18 is connected to the water storage tank 20 through an outlet hose. The water storage tank 20 is connected to the inlet of the lower aeration tank 13 through an inlet hose 11. A peristaltic pump 12 is installed on the inlet hose 11. The upper water storage tank 18, the water storage tank 20, the inlet hose 11, the peristaltic pump 12 and the lower aeration tank 13 constitute a wastewater treatment cycle.

[0046] The gas recycling device includes a gas collection hood 1, which is connected to an aeration stone 4 located at the bottom of the lower aeration tank 13 via a gas collection hose 2. An air pump 3 is installed on the gas collection hose 2.

[0047] The base support 19 consists of two support columns. The wastewater circulation treatment device is fixed between the two support columns of the base support 19. The dielectric barrier discharge plasma generator is located directly above the reaction tank 22 and is fixed above the two support columns of the base support 19. After the gas collection hood 1 covers the wastewater circulation treatment device and the dielectric barrier discharge plasma generator, it is fixed above the two support columns of the base support 19.

[0048] The water in the lower aeration tank 13 flows into the reaction tank 22 in the upper water storage tank 18 through the overflow inlet 23. The height of the inlet baffle 15 and the outlet baffle 16 is lower than the baffles around the upper water storage tank 18, and the height of the outlet baffle 16 is lower than the inlet baffle 15, to prevent water from overflowing the upper water storage tank 18 and to keep the liquid level in the upper water storage tank 18 at a stable height.

[0049] The aeration stone 4 is made of ceramic, which has high hardness and corrosion resistance. Ceramic aeration stones typically produce uniform, tiny bubbles and are positioned 3.5 cm from the inlet of the lower aeration tank 13.

[0050] The gas collection hood 1 is made of acrylic sheet with a thickness of 3mm. The gas collection port is located at the bottom of the gas collection hood 1, and can effectively collect the ozone generated by the reaction through an air pump.

[0051] The dielectric barrier discharge plasma generator includes a quartz plate holder 6, which consists of two fixed seats and a top plate. A high-voltage terminal 5 is provided in the center of the upper surface of the top plate, and an aluminum heat sink 8 is provided below the top plate. A stainless steel electrode 9 is provided below the aluminum heat sink 8, and a quartz plate 10 is provided below the stainless steel electrode 9.

[0052] Locking screws 7 are installed on both sides of the quartz plate holder 6. By adjusting the locking screws 7, the position of the stainless steel electrode 9 and the quartz plate 10 can be adjusted by the quartz plate holder 6, thereby effectively changing the height of the dielectric barrier discharge plasma generator from the reaction cell 22.

[0053] The high-voltage terminal 5 is connected to an external power supply; the external power supply is a modulated pulse plasma power supply with an output power of 200W.

[0054] The quartz plate 10 is rectangular with a lower surface area of ​​100 cm². 2 The stainless steel electrode 9 is rectangular, with a lower surface area of ​​30 cm². 2 .

[0055] The ceramic plate 17 loaded with the photocatalyst has a length of 10cm, a width of 4cm, a height of 1.5cm, and a pore size of 1mm.

[0056] The operating steps for using the above-mentioned low-temperature plasma combined with ozone aeration synergistic wastewater treatment device are as follows:

[0057] (1) Add the antibiotic-containing wastewater to the storage tank 20, start the peristaltic pump 12, and pump the wastewater to be treated into the lower aeration tank 13. When the height of the wastewater to be treated in the lower aeration tank 13 is higher than the inlet baffle 15, it will enter the reaction tank 22 through the overflow inlet 23.

[0058] (2) Adjust the dielectric barrier discharge plasma generator so that the height of the quartz plate from the upper surface of the wastewater to be treated is 3cm. Then place the gas collection hood 1 above the dielectric barrier discharge plasma generator and the wastewater circulation treatment device to cover them. The wastewater to be treated in the reaction tank 22 is treated by the dielectric barrier discharge plasma generator. At the same time, the ozone generated during the treatment process is recovered into the gas collection hood 1 by the air pump 3 and circulated in the reaction tank 22 to achieve low temperature plasma combined with ozone aeration and cyclic treatment.

[0059] (3) The wastewater treated in the reaction tank 22 is returned to the storage tank 20 and then pumped into the lower aeration tank 13 for circulation treatment, so as to obtain clean water after the removal of organic matter for discharge or reuse.

[0060] Example 2

[0061] A wastewater treatment device combining low-temperature plasma and ozone aeration is disclosed. The structure is as described in Example 1, except that the lower aeration tank 13 is further equipped with four inclined plates 14 at a 45° angle. The purpose of these inclined plates is to increase the contact surface area between the air bubbles and the water, control the flow rate, make the water flow more uniform, facilitate gas dissolution in the water, and achieve more thorough aeration.

[0062] Example 3

[0063] A method for using a low-temperature plasma combined with ozone aeration synergistic wastewater treatment device, the operation steps are as described in Example 1, the difference being that in step (2), the dielectric barrier discharge plasma generator is adjusted so that the height of the quartz plate from the upper surface of the wastewater to be treated is 2.5 cm.

[0064] Comparative Example 1

[0065] A wastewater treatment device, with the structure described in Example 1, differs in that it consists only of a wastewater recycling treatment device, a dielectric barrier discharge plasma generator, and a base support 19, and does not contain a gas recycling device.

[0066] Experimental Example 1

[0067] 1. Using the apparatus described in Example 2 and Comparative Example 1, organic wastewater was treated according to the method described in Example 1. The initial power of the external power supply was 160W, and the treatment time was 30 minutes. The treated wastewater was then analyzed by liquid chromatography to determine the residual moxifloxacin concentration. The results are as follows: Figure 6 As shown.

[0068] The pollutant in the organic wastewater is moxifloxacin, with a concentration of 100 mg / L and a volume of 1 L.

[0069] Depend on Figure 6 It can be seen that the device in Example 2 of the present invention achieved a degradation rate of 50% for moxifloxacin in less than 15 minutes. In contrast, the device in Comparative Example 1 achieved a degradation rate of 50% for moxifloxacin only after about 18 minutes of treatment. Furthermore, after 30 minutes of treatment, the device in Example 2 of the present invention achieved a degradation rate of 90% for moxifloxacin, while the device in Comparative Example 1 only achieved a degradation rate of 70%.

[0070] 2. Using the apparatus described in Example 2 and Comparative Example 1, organic wastewater was treated according to the method described in Example 1. The initial power of the external power supply was 160W, and the treatment time was 30 minutes. The treated wastewater was then analyzed by liquid chromatography to determine the residual mabofloxacin concentration. The results are as follows: Figure 7 As shown.

[0071] The pollutant in the organic wastewater is marbofloxacin, with a concentration of 100 mg / L and a volume of 1 L.

[0072] Depend on Figure 7It can be seen that the device in Example 2 of the present invention achieved a degradation rate of 50% for mabofloxacin in less than 20 minutes. In contrast, the device in Comparative Example 1 required approximately 28 minutes to achieve a degradation rate of 50% for mabofloxacin. Furthermore, after 30 minutes of treatment, the device in Example 2 achieved a degradation rate of 70% for mabofloxacin, while the device in Comparative Example 1 only achieved a degradation rate of 52%.

[0073] 3. Using the apparatus described in Example 2 and Comparative Example 1, organic wastewater was treated according to the method described in Example 1. The initial power of the external power supply was 160W, and the treatment time was 30 minutes. The treated wastewater was then analyzed by liquid chromatography to determine the residual ofloxacin concentration. The results are as follows: Figure 8 As shown.

[0074] The pollutant in the organic wastewater is ofloxacin, with a concentration of 100 mg / L and a volume of 1 L.

[0075] Depend on Figure 8 It can be seen that the device in Example 2 of the present invention achieved a degradation rate of 50% for ofloxacin in less than 20 minutes. In contrast, the device in Comparative Example 1 achieved a degradation rate of 50% for ofloxacin only after about 27 minutes of treatment. Furthermore, after 30 minutes of treatment, the device in Example 2 of the present invention achieved a degradation rate of 70% for ofloxacin, while the device in Comparative Example 1 achieved a degradation rate of only 52% for ofloxacin.

[0076] The above results demonstrate that the low-temperature plasma combined with ozone aeration synergistic wastewater treatment device provided by this invention can collect ozone and reintroduce it into the reactor system, realizing the combination of plasma and ozone aeration for synergistic and cyclical treatment of wastewater containing antibiotics, ensuring the stability of wastewater treatment, and greatly enhancing the treatment efficiency and effect of wastewater.

Claims

1. A wastewater treatment device combining low-temperature plasma and ozone aeration, characterized in that, Includes a wastewater recycling and treatment device, a gas recycling and utilization device, a dielectric barrier discharge plasma generator, and a base support; The wastewater recycling treatment device includes a treatment tank and a storage tank. The treatment tank includes an upper storage tank and a lower aeration tank. The upper storage tank is located above the lower aeration tank, and its area is smaller than that of the lower aeration tank, forming an overflow inlet on one side. A reaction tank composed of an inlet baffle and an outlet baffle is arranged in the center of the upper storage tank. A ceramic plate loaded with a photocatalyst is arranged inside the reaction tank. The upper storage tank is connected to the storage tank through an outlet hose, and the storage tank is connected to the lower aeration tank through an inlet hose. A peristaltic pump is installed on the inlet hose. The upper storage tank, the storage tank, the inlet hose, the peristaltic pump, and the lower aeration tank constitute a wastewater treatment cycle. The lower aeration tank is equipped with a 45° inclined plate; the water in the lower aeration tank flows into the reaction tank in the upper water storage tank through the overflow inlet; the height of the inlet baffle and the outlet baffle are both lower than the baffles around the upper water storage tank, and the height of the outlet baffle is lower than the inlet baffle. The gas recycling device includes a gas collection hood, which is connected to the aeration stone located at the bottom of the lower aeration tank via a gas collection hose, and an air pump is installed on the gas collection hose. The base support consists of two support columns. The wastewater circulation treatment device is fixed between the two support columns of the base support. The dielectric barrier discharge plasma generator is located directly above the reaction tank and is fixed above the two support columns of the base support. After the gas collection hood covers the wastewater circulation treatment device and the dielectric barrier discharge plasma generator, it is fixed above the two support columns of the base support.

2. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 1, characterized in that, The aeration stone is made of ceramic and is located 3.5 cm away from the inlet of the lower aeration tank.

3. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 1, characterized in that, The gas collection hood is made of acrylic sheet with a thickness of 3mm.

4. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 1, characterized in that, The dielectric barrier discharge plasma generator includes a quartz plate holder, which consists of two mounting bases and a top plate. A high-voltage terminal is provided at the center of the upper surface of the top plate, and an aluminum heat sink is provided below the top plate. A stainless steel electrode is provided below the aluminum heat sink, and a quartz plate is provided below the stainless steel electrode.

5. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 4, characterized in that, Locking screws are installed on both sides of the quartz plate fixing bracket; the high-voltage terminal is connected to an external power supply; the external power supply is a modulated pulse plasma power supply.

6. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 4, characterized in that, The surface area of ​​the quartz plate is larger than that of the stainless steel electrode, and it is rectangular in shape with a length:width ratio of 8:

5.

7. The wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 4, characterized in that, The stainless steel electrode is rectangular in shape, with a length:width ratio of 5:

2.

8. The method of using the wastewater treatment device combining low-temperature plasma and ozone aeration as described in claim 1, characterized in that, The operation steps are as follows: (1) Add the antibiotic-containing wastewater to the storage tank, start the peristaltic pump, and pump the wastewater to be treated into the lower aeration tank. When the height of the wastewater to be treated in the lower aeration tank is higher than the inlet baffle, it will enter the reaction tank through the overflow inlet. (2) Adjust the dielectric barrier discharge plasma generator so that the height of the quartz plate from the upper surface of the wastewater to be treated is 1~4cm. Then place the gas collection hood above the dielectric barrier discharge plasma generator and the wastewater circulation treatment device to cover them. The wastewater to be treated in the reaction tank is treated by the dielectric barrier discharge plasma generator. At the same time, the ozone generated during the treatment process is recovered into the gas collection hood by the air pump and circulated in the reaction tank to achieve low temperature plasma combined with ozone aeration and cyclic treatment. (3) The wastewater treated in the reaction tank is returned to the storage tank and then pumped into the lower aeration tank for circulation treatment, so as to obtain clean water after the removal of organic matter for discharge or reuse.

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