An in-situ regenerable assembled constructed wetland device and control system

Abstract

The present application relates to a kind of in-situ regenerable assembly type artificial wetland device, control system, the wetland device includes first chamber and second chamber, first chamber is equipped with the water inlet area, multiple filler area, water outlet area being communicated, adjacent filler area is separated by water taking area, each filler area bottom is equipped with the bottom aeration zone being communicated, second chamber is communicated with bottom aeration zone, water inlet area and water outlet area, second chamber is filled with filler regeneration liquid.Because the wetland module of assembly type artificial wetland generally total amount of filler is relatively less, filler density is higher, it leads to cleaning difficulty is greater;Second, wetland filler can expand or deform, make the interval of filler in filler module be narrow, lead to cleaning fluid unable to flow through filler layer.If cleaning fluid flow is blocked, it can lead to cleaning effect decline.In order to give full play to its advantage, the present application proposes a kind of in-situ regenerable assembly type artificial wetland device, realizes the recovery of filler module original function and is used again.

Description

Technical Field

[0001] This invention relates to the field of constructed wetland technology, specifically to a prefabricated constructed wetland device and control system that can be regenerated in situ. Background Technology

[0002] Constructed wetlands are an important means of water purification. Due to their unique advantages, constructed wetlands are receiving increasing attention and are widely used in the treatment of urban sewage and effluent, industrial wastewater, and agricultural non-point source pollution. However, traditional constructed wetland construction often requires on-site construction, leading to long construction periods, labor-intensive work, and limitations imposed by seasonal and climatic factors. Furthermore, long-term operation of constructed wetlands is prone to problems such as clogging, limited nitrogen and phosphorus interception effects, and difficulties in regenerating the packing material. Currently, there is a lack of research on solving the problem of clogging in constructed wetland packing materials.

[0003] The construction of prefabricated constructed wetlands draws heavily on the concepts of prefabricated buildings, considering construction and installation issues before the design phase. After prefabrication of components in the factory, they are transported to the site for rapid assembly, enabling quick installation and commissioning of the wetland system. Prefabricated constructed wetland technology features flexibility and modular design, allowing for combinations and adjustments based on different water quality conditions. Therefore, it is suitable for various scales and types of discharge sources, such as urban sewage treatment, agricultural wastewater treatment, and industrial wastewater treatment. When the packing modules become severely clogged, they can be quickly and efficiently replaced using a crane, ensuring the normal operation and discharge effectiveness of the constructed wetland.

[0004] However, because prefabricated constructed wetlands typically have smaller wetland modules than traditional constructed wetlands, a smaller total amount of packing material, and a higher packing density, the spaces between the packing materials are narrower, making cleaning more difficult. Secondly, the wetland packing material may expand or deform, narrowing the spacing between the packing materials within the module and preventing the cleaning fluid from flowing through the packing layer. If the flow of the cleaning fluid is obstructed, the cleaning effect will decrease. Summary of the Invention

[0005] This invention provides an in-situ regenerable prefabricated artificial wetland device and control system, which realizes the in-situ regeneration of the packing module in order to improve the cleaning effect of the wetland packing.

[0006] The present invention provides the following solution to the above-mentioned technical problems: a prefabricated artificial wetland device that can be regenerated in situ, comprising a first chamber and a second chamber. The first chamber is provided with a connected water inlet area, multiple filler areas, and a water outlet area. Adjacent filler areas are separated by a water intake area. Each filler area has a connected bottom aeration area at its bottom. The second chamber is connected to the bottom aeration area, the water inlet area, and the water outlet area. The second chamber is filled with filler regeneration liquid.

[0007] The water flow direction of the constructed wetland device is inlet zone → packing zone → outlet zone. To maximize the utilization of the packing zone and achieve graded absorption, the packing zones are separated by an intake zone. When the packing zone becomes blocked or ineffective, the packing regeneration solution passes through the aeration zone and enters the packing zone, then flows back to the second chamber from the outlet zone, forming a complete circulation system. During the regeneration process, the inlet zone can also be connected to a circulating pump and function as an aeration zone.

[0008] To ensure the regeneration effect of the packing regeneration solution, it is prepared in advance according to the regeneration cycle and filled into the second chamber in advance when regeneration is required. The preparation method of the packing regeneration solution is as follows:

[0009] In the second chamber, ceramsite washed with distilled water and a mixed bacterial solution were added at a feed ratio of 1 kg: 5 L. The mixed bacterial solution was prepared by dissolving Bacillus megaterium solid particles and nitrifying bacteria particles in distilled water and activating for 5 hours. After activation, an appropriate amount of microbial culture solution was added to the water. The concentration of Bacillus megaterium and nitrifying bacteria was 0.3 g / L.

[0010] Preferably, the packing zones are separated by two opposing baffles, and the two sides of the baffles contact the inner wall of the first chamber to form a water intake zone.

[0011] A baffle can also be used to separate the first packing zone from the inlet zone, and a baffle can also be used to separate the last packing zone from the outlet zone to control the water flow.

[0012] Preferably, the baffle is detachably connected to a fixing frame, the fixing frame is provided with a plurality of holes whose positions increase in the height direction, and the baffle is provided with a plurality of holes.

[0013] The holes between the baffle and the fixed frame can be detachably connected by bolts. By changing the height of the baffle relative to the packing area through different connection positions, the water flow can be controlled.

[0014] Preferably, the filling area includes a filling cage filled with a filling matrix, on which wetland plants are placed; the filling cage has a protrusion on its exterior, and the baffle has a groove that fits into the protrusion. The technical feature is that the filling cage is hung and fixed on the baffle; this facilitates the mutual installation of the baffle and the filling cage. It helps improve the positioning accuracy of the filling area and also enhances the stability between the filling module and the baffle.

[0015] The packing cage is equipped with a partition (made of permeable material) and a baffle plate. Packing substrate is placed on the partition, and a gap is left between the partition and the bottom of the packing cage to form a water storage layer. The baffle plate extends to both sides and is fixed to the inner wall of the artificial wetland tank, with its bottom end vertically passing through the partition and approaching the bottom of the packing cage, but not in contact with it. The baffle plate divides the packing cage into two chambers, causing the wastewater to flow in a "U" shape. From top to bottom, the wastewater passes through wetland plants, the packing substrate, and the water storage layer, then from bottom to top, it passes through the packing substrate and wetland plants in the other chamber before flowing to the water intake area. This increases the wastewater retention time, thereby improving the purification effect.

[0016] The packing matrix in the packing cage is singular, and can be natural packing materials such as bio-ceramic granules, gravel, quartz sand, and zeolite. Different packing matrices are used in different packing zones to achieve tiered purification. The wetland plants can be aquatic plants such as calamus, canna lilies, and Siberian iris. The number and combination of packing modules can be adjusted according to specific needs and influent water quality characteristics. Dense wetland plants, which typically have strong pollutant degradation and purification capabilities, cover the packing modules. The interaction between the packing matrix and wetland plants further enhances the water treatment effect. The packing matrix and wetland plants can be prefabricated and easily and quickly put into use after transportation to the designated location, thereby improving construction efficiency.

[0017] The packing cage can be equipped with portable handles on both sides to facilitate cage replacement and transportation.

[0018] The packing cage is reinforced with two steel bars on each of its four sides to ensure that the four sides of the packing cage do not deform or break when subjected to packing compression and water pressure.

[0019] A layer of waterproof geotextile can be attached to the inner wall and bottom of the filling cage to further prevent water leakage to the next filling area and ensure utilization.

[0020] Preferably, the inner wall of the first chamber is provided with a plurality of support members, which support and abut against the packing cage to leave a cavity between the bottom of the packing cage and the bottom of the first chamber to form a bottom aeration zone, and the bottom aeration zone is provided with an aeration disc; the second chamber is provided with a circulation pump, and the outlet of the circulation pump is connected to the bottom aeration zone.

[0021] Aeration discs can provide the auxiliary gas needed for in-situ regeneration of packing material, thereby accelerating the process of microbial degradation of pollutants inside the packing material.

[0022] Preferably, a liquid level detection device is provided in the water outlet area.

[0023] The water level changes in the constructed wetland are observed by a liquid level detection device. When the packing material becomes clogged, the speed at which water flows through the packing area slows down, which in turn slows down the speed at which water flows into the outlet area. Meanwhile, the speed at which water flows from the outlet area into the outside remains unchanged, resulting in a lower liquid level in the outlet area. When the liquid level is lower than the set value, it indicates that the blockage in the packing area is quite serious and regeneration is required.

[0024] Preferably, the wetland device further includes a flushing device, which is disposed above the first chamber; the flushing device includes a main pipe, which extends to both sides into a plurality of equally spaced branch pipes, and the outlets of the branch pipes are connected to nozzles.

[0025] After wetland plants have grown for a long time, their roots accumulate a certain amount of metabolic products and suspended solids. These substances may reduce the purification efficiency of the wetland and cause blockage of the filler modules. To solve this problem, the nozzles of the flushing device can spray high-pressure water onto the roots of the wetland plants to wash away the accumulated harmful substances.

[0026] Preferably, the outer wall of the first chamber is provided with a water outlet at the position corresponding to the bottom of the packing cage, which can be used to collect water samples or discharge wastewater during cleaning and regeneration.

[0027] The present invention also provides a control system for a prefabricated artificial wetland device that can be regenerated in situ as described above, including a water quality monitoring system, a water control system, a regeneration system and an alarm system;

[0028] The water quality monitoring system is used to detect whether the water level in the outlet area is within the set value, determine whether the wetland device needs to be regenerated, and if so, send regeneration information to the water control system and the regeneration system.

[0029] The water control system is used to control the water inlet area to stop water intake after receiving regeneration information, and to control the water inlet area to enter water after regeneration is completed;

[0030] The regeneration system is used to start the circulation pump and open the valve and aeration disc of the first chamber after receiving regeneration information;

[0031] The alarm system is used to issue an alarm signal after the water quality monitoring system sends regeneration information four times in a row.

[0032] The present invention also provides a purification method and a regeneration method for a prefabricated constructed wetland device with in-situ regeneration as described above, comprising the following steps:

[0033] Open the inlet of the water inlet area to allow water to overflow into the first packing zone. After purification in the first packing zone, the water overflows into the water intake area and then overflows into the next packing zone until it is purified in the last packing zone and enters the water outlet area. The water quality is detected by the liquid level detection device in the water outlet area to determine whether the packing matrix in the packing zone needs to be regenerated. If it needs to be regenerated, the regeneration process is initiated. The steps are as follows.

[0034] Close the inlet of the inlet area and the outlet of the outlet area, drain the water from the first chamber, open the valve of the second chamber, start the circulation pump, and allow the packing regeneration liquid to enter the bottom aeration zone. Open the aeration disc to provide the auxiliary gas required for the in-situ regeneration of the packing, allowing the packing regeneration liquid to enter the packing zone, then flow into the water intake zone and the outlet zone in sequence, and then flow back to the second chamber for recirculation until the liquid level detection device detects that the water quality meets the requirements, at which point regeneration stops and the packing regeneration liquid is discharged.

[0035] The beneficial effects of this invention are as follows:

[0036] (1) When traditional prefabricated artificial wetland fillers become clogged, a crane is used to lift the filler module for replacement and cleaning. This invention can directly regenerate the filler in situ according to the clogged condition, which is more convenient and faster.

[0037] (2) This invention introduces the concept of in-situ regeneration of packing material, prepares packing material regeneration liquid, and regenerates wetland packing material matrix through the auxiliary effect of bottom aeration of packing material, thereby extending the service life of wetland packing material.

[0038] (3) The present invention adopts an intelligent detection and monitoring system, which can accurately monitor the wetland operation status and water quality changes, and determine whether the wetland filler needs to be regenerated in situ.

[0039] (4) This invention also optimizes the pollutant removal efficiency under different influent water qualities by adjusting the gradation of the packing material. The combination ratio of the packing material can be flexibly adjusted according to the different characteristics of the influent water quality to maximize the treatment effect.

[0040] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0042] Figure 1This is a front view schematic diagram of the in-situ regenerable prefabricated constructed wetland device of Example 1;

[0043] Figure 2 This is a top view schematic diagram of the in-situ regenerable prefabricated constructed wetland device of Example 1;

[0044] Figure 3 This is a perspective view of the first cavity in Example 1.

[0045] The attached diagram lists the components represented by each number as follows:

[0046] 10. First chamber; 20. Second chamber; 30. Flushing device; 11. Inlet area; 12. Packing area; 13. Outlet area; 14. Water intake area; 15. Bottom aeration area; 16. Baffle; 17. Fixing frame; 18. Aeration disc; 19. Liquid level detection device; 21. Circulating pump; 22. Packing cage; 23. Support component. Detailed Implementation

[0047] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0048] Example 1

[0049] like Figure 1-2 As shown, the present invention provides a prefabricated constructed wetland device that can be regenerated in situ, including a first chamber 10 and a second chamber 20. The first chamber 10 is provided with a connected water inlet area 11, multiple filler areas 12, and a water outlet area 13. Adjacent filler areas 12 are separated by two opposing baffles 16. The two sides of the baffles 16 contact the inner wall of the first chamber 10 to form a water intake area 14. The filler areas 12 are also separated from the water inlet area 11 and the water outlet area 13 by the baffles 16.

[0050] like Figure 3As shown, the packing zone 12 includes a packing cage 22. The inner wall of the first chamber 10 is provided with multiple support members 23. These support members 23 abut against the packing cage 22, leaving a cavity between the bottom of the packing cage 22 and the bottom of the first chamber 10, forming a bottom aeration zone 15. The bottom aeration zone 15 is equipped with an aeration disc 18. The second chamber 20 communicates with the inlet zone 11 and the outlet zone 13, and is equipped with a circulation pump 21. The outlet of the circulation pump 21 communicates with each of the bottom aeration zones 15. The second chamber 20 is filled with packing regeneration liquid. When the packing zone 12 becomes blocked or ineffective, the packing regeneration liquid is pushed into the bottom aeration zone 15 by the circulation pump 21, passes through the packing zone 12, and then flows back to the second chamber 20 from the outlet zone 13, forming a complete circulation system. The aeration disc 18 can provide the auxiliary gas required for in-situ regeneration of the packing, accelerating the process of microbial degradation of pollutants inside the packing. During the regeneration process, the inlet zone 11 can also be used as an aeration zone in the circulation. The outer wall of the first chamber 10 is provided with an outlet at the bottom position of the packing cage 22, which can be used to collect water samples or discharge wastewater during cleaning.

[0051] The baffle 16 is detachably connected to a fixing frame 17, which has multiple holes whose positions increase along the height direction. The baffle 16 also has multiple holes. By changing the connection positions between the holes, the height of the baffle 16 relative to the packing area 12 is changed, thereby controlling the water flow. The packing cage 22 has a protrusion on its outside, and the baffle 16 has a groove that fits into the protrusion, facilitating the installation of the baffle 16 and the packing cage 22.

[0052] To ensure the regeneration effect of the packing regeneration solution, it is prepared in advance according to the regeneration cycle and filled into the second chamber 20 in advance when regeneration is required. The preparation method of the packing regeneration solution is as follows: In the second chamber, ceramsite washed with distilled water and mixed bacterial solution are added at a feeding ratio of 1 kg: 5 L. The mixed bacterial solution is prepared by dissolving Bacillus megaterium solid particles and nitrifying bacteria particles in distilled water and activating for 5 hours. After activation, an appropriate amount of microbial culture solution is added to the water. The concentration of Bacillus megaterium is 0.3 g / L, and the concentration of nitrifying bacteria is 0.3 g / L.

[0053] The packing cage 22 is filled with a packing substrate, and wetland plants are placed on the packing substrate. The packing substrate in the packing cage 22 is a single type, and the packing substrate can be natural packing materials such as bio-ceramic granules, gravel, quartz sand, and zeolite. By filling different packing substrates in different packing zones 12, graded purification is achieved. The wetland plants can be aquatic plants such as calamus, canna lily, and Siberian iris.

[0054] The packing cage 22 may be equipped with portable handles on both sides of the cage body for easy replacement and transportation of the cage body.

[0055] The four sides of the packing cage 22 are reinforced with two steel bars to ensure that the four sides of the cage do not deform or break when subjected to packing compression and water pressure.

[0056] A layer of waterproof geotextile can be attached to the inner walls and bottom of the filling cage 22 to further prevent water leakage to the next filling area and ensure utilization.

[0057] The water outlet zone 13 is equipped with a liquid level detection device 19. By observing the changes in the water level in the artificial wetland, the system can determine whether the wetland filler needs to be regenerated in situ and make corresponding controls and adjustments.

[0058] A flushing device 30 is also provided above the first chamber 10 and the second chamber 20. The flushing device 30 includes a main pipe, and multiple branch pipes arranged at equal intervals extend from the main pipe to both sides. The outlet of each branch pipe is connected to a nozzle.

[0059] Example 2

[0060] This embodiment provides a control system for an in-situ regenerable prefabricated constructed wetland device as described in Embodiment 1, including a water quality monitoring system, a water control system, a regeneration system, and an alarm system;

[0061] The water quality monitoring system is used to detect whether the water level in the outlet area 13 is within the set value, determine whether the wetland device needs to be regenerated, and if so, send regeneration information to the water control system and the regeneration system.

[0062] The water control system is used to control the water inlet zone 11 to stop water intake after receiving regeneration information, and to control the water inlet zone 11 to receive water after regeneration is completed;

[0063] The regeneration system is used to start the circulation pump 21 and open the valve and aeration disc 18 of the first chamber 10 after receiving regeneration information;

[0064] The alarm system is used to issue an alarm signal after the water quality monitoring system sends regeneration information four or more times in a row, prompting maintenance personnel to carry out maintenance.

[0065] Example 3

[0066] The purification and regeneration methods for the prefabricated constructed wetland device with in-situ regeneration as described above include the following steps:

[0067] Open the inlet of the water inlet zone 11 to allow water to overflow into the first packing zone 12. After being purified in the first packing zone 12, the water overflows into the water intake zone 14 and then overflows into the next packing zone 12 until it is purified in the last packing zone 12 and enters the water outlet zone 13. The water quality is detected by the liquid level detection device 19 in the water outlet zone 13 to determine whether the packing matrix in the packing zone 12 needs to be regenerated. If it needs to be regenerated, the regeneration process is initiated, and the steps are as follows.

[0068] Close the inlet of the inlet zone 11 and the outlet of the outlet zone 13, drain the water in the first chamber 10, open the valve of the second chamber 20, start the circulation pump 21, so that the packing regeneration liquid enters the bottom aeration zone 15, open the aeration disc 18 to provide the auxiliary gas required for the in-situ regeneration of the packing, so that the packing regeneration liquid enters the packing zone 12, then flows into the water intake zone 14 and the outlet zone 13 in sequence, and then flows back to the second chamber 20 for circulation again until the liquid level detection device 19 detects that the water quality meets the requirements, then stop the regeneration and discharge the packing regeneration liquid.

[0069] In this embodiment, a liquid level detection device 19 is installed in the outlet zone 13 to detect the liquid level height of the outlet zone 13 and determine whether regeneration should be initiated. When the packing material becomes clogged, the speed at which water flows through the packing zone 12 slows down, resulting in a slower flow rate of water into the outlet zone 13. However, the speed at which water from the outlet zone 13 is discharged to the outside remains unchanged, causing the liquid level in the outlet zone 13 to drop. In the control system, the liquid level height of the outlet zone 13 is detected. When the liquid level is lower than the set value, it indicates that the clog in the packing zone 12 is severe and regeneration is required. The control system issues a control command to shut off the water inlet. After detecting that the water in the first chamber 10 has been emptied, the control system issues another command to shut off the drainage, start the circulation pump 21, and start the aeration disc 18 to regenerate the packing material.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A prefabricated constructed wetland device capable of in-situ regeneration, characterized in that, It includes a first chamber (10) and a second chamber (20). The first chamber (10) is provided with a water inlet area (11), multiple packing areas (12) and a water outlet area (13) that are connected. Adjacent packing areas (12) are separated by a water intake area (14). Each packing area (12) has a bottom aeration area (15) that is connected at the bottom. The second chamber (20) is connected to the bottom aeration area (15), the water inlet area (11) and the water outlet area (13). The second chamber (20) is filled with packing regeneration liquid. The filling area (12) is separated by two opposing baffles (16), and the two sides of the baffles (16) contact the inner wall of the first chamber (10) to form a water intake area (14); The filling area (12) includes a filling cage (22), which is filled with a filling substrate and wetland plants are placed on the filling substrate; the filling cage (22) has a protrusion on the outside and the baffle (16) has a groove that fits the protrusion. The inner wall of the first chamber (10) is provided with a plurality of support members (23), which support and abut against the packing cage (22) so that the bottom of the packing cage (22) and the bottom of the first chamber (10) are left with a cavity to form a bottom aeration zone (15), and the bottom aeration zone (15) is provided with an aeration disc (18); the second chamber (20) is provided with a circulation pump (21), and the outlet of the circulation pump is connected to the bottom aeration zone (15); In the second chamber (20), ceramsite washed with distilled water and mixed bacterial solution were added at a feeding ratio of 1 kg: 5 L. The mixed bacterial solution was prepared by mixing and dissolving solid particles of Bacillus megaterium and nitrifying bacteria particles in distilled water and activating for 5 hours. After activation, an appropriate amount of microbial culture solution was added to the water, wherein the concentration of Bacillus megaterium was 0.3 g / L and the concentration of nitrifying bacteria was 0.3 g / L.

2. The prefabricated constructed wetland device capable of in-situ regeneration according to claim 1, characterized in that, The baffle (16) is detachably connected to a fixing frame (17), the fixing frame (17) is provided with a plurality of holes whose positions increase along the height direction, and the baffle (16) is provided with a plurality of holes.

3. The prefabricated constructed wetland device capable of in-situ regeneration according to claim 1, characterized in that, The water outlet area (13) is equipped with a liquid level detection device (19).

4. The prefabricated constructed wetland device capable of in-situ regeneration according to claim 1, characterized in that, The wetland device also includes a flushing device (30), which is located above the first chamber (10); the flushing device (30) includes a main pipe, which extends to both sides into multiple equally spaced branch pipes, and the outlets of the branch pipes are connected to nozzles.

5. The prefabricated constructed wetland device capable of in-situ regeneration according to claim 1, characterized in that, The outer wall of the first chamber (10) is provided with a water outlet at the bottom position of the packing cage (22).

6. The control system of the in-situ regenerable prefabricated constructed wetland device as described in any one of claims 1-5, characterized in that, This includes a water quality monitoring system, a water control system, a regeneration system, and an alarm system. The water quality detection and monitoring system is used to detect whether the water level in the outlet area (13) is within the set value, and to determine whether the wetland device needs to be regenerated. If so, it sends regeneration information to the water control system and the regeneration system. The water control system is used to control the water inlet area (11) to stop water intake after receiving regeneration information, and to control the water inlet area (11) to enter water after the regeneration process is completed; The regeneration system is used to start the circulation pump (21) and open the valve of the second chamber (20) and the aeration disc (18) after receiving the regeneration information; The alarm system is used to issue an alarm signal after the water quality monitoring system sends regeneration information four times in a row.

7. The purification and regeneration methods for the in-situ regenerable prefabricated constructed wetland device as described in any one of claims 1-5, characterized in that, Includes the following steps: Open the inlet of the inlet area (11) to allow water to overflow into the first packing zone (12). After purification in the first packing zone (12), the water overflows into the intake area (14) and then overflows into the next packing zone (12) until it is purified in the last packing zone (12) and enters the outlet area (13). The water quality is detected by the liquid level detection device (19) in the outlet area (13) to determine whether the packing matrix in the packing zone (12) needs to be regenerated. If it needs to be regenerated, the regeneration process is initiated. The steps are as follows: Close the inlet of the inlet zone (11) and the outlet of the outlet zone (13), drain the water in the first chamber (10), open the valve of the second chamber (20), start the circulation pump (21), so that the packing regeneration liquid enters the bottom aeration zone (15), open the aeration disc (18) to provide the auxiliary gas required for the in-situ regeneration of the packing, so that the packing regeneration liquid enters the packing zone (12), then flows into the water intake zone (14) and the outlet zone (13) in sequence, and then flows back to the second chamber (20) for circulation again until the liquid level detection device (19) detects that the water quality meets the requirements, stop the regeneration, and discharge the packing regeneration liquid.

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