A biological aerated filter bacteria colony preservation system suitable for chemical wastewater treatment

Abstract

The present application relates to chemical industrial wastewater biological treatment technical field, and disclose a kind of biological aeration filter bacteria population live preservation system suitable for chemical industrial wastewater treatment, including control system and pool body, the outside of pool body is equipped with water distribution tank, the other side of pool body is provided with drainage pipeline, the inside of pool body is equipped with biological filter material, aeration pipe, filter head, backwash inlet pipe and backwash inlet pipe, the outside of pool body is equipped with pH controller, the side above pool body is equipped with liquid storage barrel, the inside of liquid storage barrel is provided with stirring rod body.The present application can adapt to the treatment demand of chemical industrial wastewater by installing silicon rubber heating band outside biological aeration filter, avoid the corrosion of sewage to heating component and other problems, also can realize uniform heating to the inside of biological aeration filter, avoid the problem of overheating in certain position and affect bacteria population, and by setting up heat insulation layer outside filter, can reduce heat loss, also can protect relevant accessories, reduce the energy consumption of the system.

Description

Technical Field

[0001] This invention relates to the field of biological treatment technology for chemical wastewater, specifically a biological aeration filter microbial community preservation system suitable for chemical wastewater treatment. Background Technology

[0002] Aerated biological filters are a type of biofilm wastewater treatment process that integrates biological oxidation and solid-liquid separation. They eliminate the need for secondary sedimentation tanks and achieve cyclical operation of the filters through backwashing. They are widely used in the treatment and upgrading of municipal sewage and industrial wastewater, effectively removing organic matter and suspended solids, as well as achieving nitrogen and phosphorus removal.

[0003] The key to maintaining efficient and stable biological treatment capacity of aerated biological filters and ensuring the continuous and effective removal of pollutants such as organic matter, ammonia nitrogen, and phosphorus is the survival of the bacterial community. In order to maintain the activity of the bacterial community, the water temperature and pH value need to be kept within a certain range, and large fluctuations should not occur.

[0004] Typically, heating devices and pH controllers are installed in biological aerated filters to maintain bacterial community activity. However, in practice, most existing industrial-grade pH controllers lack agitators, leading to sedimentation of the pH-adjusting solution. This affects the accuracy of pH control during operation. Furthermore, even with agitators, the high-concentration solution at the bottom of the pH-adjusting solution may be discharged before proper mixing when the pH controller activates, causing significant pH fluctuations during adjustment. This is detrimental to bacterial community survival in biological aerated filters used for chemical wastewater treatment. Additionally, biological aerated filters for chemical wastewater require a temperature of 20-35°C to maintain microbial activity. However, chemical wastewater is highly corrosive, oily, and high in salt. Regular maintenance of the heating equipment is necessary to prevent scaling or clogging, increasing manual labor and slowing down the treatment process. Summary of the Invention

[0005] In view of the shortcomings of existing biological aeration filter microbial community preservation systems mentioned in the background art, the present invention provides a biological aeration filter microbial community preservation system suitable for chemical wastewater treatment, which has the advantages of good microbial community activity preservation, low maintenance cost and energy saving, and solves the technical problems mentioned in the background art.

[0006] This invention provides the following technical solution: a biological aeration filter microbial community preservation system suitable for chemical wastewater treatment, comprising a control system and a tank body. A water distribution trough is configured on the outer side of the tank body, and a drainage pipe is installed on the other side of the tank body. The tank body interior is equipped with biological filter media, aeration pipes, filter heads, a backwash air inlet pipe, and a backwash water inlet pipe. A pH controller is configured on the outer side of the tank body. A storage tank is installed on one side above the tank body. A stirring rod is installed inside the storage tank. A slow-speed reversible motor is configured at the outer end of the stirring rod, and the output shaft of the slow-speed reversible motor is movably connected to the stirring rod. Simultaneously, the slow-speed reversible motor is controlled by the pH controller. The portion of the stirring rod located outside the storage tank is threaded. A rotating rod is configured below the slow-speed reversible motor. A gear transmission assembly is connected to the outer side of the output shaft of the slow-speed reversible motor. The other end of the gear transmission assembly is connected to the rotating rod. A rotating block is configured at the top of the rotating rod, and the rotating block is installed below the storage tank.

[0007] Furthermore, the tank body is made of corrosion-resistant alloy material, which can meet the treatment requirements of chemical wastewater. The outer wall of the tank body is equipped with silicone rubber heating strips, which are evenly wrapped around the outer wall of the tank body and driven and controlled by the control system. The tank body is also equipped with a temperature controller, which can detect the internal temperature of the tank body and control the operation of the silicone rubber heating strips, so that the internal temperature of the tank body can be maintained within a suitable temperature range for the bacterial community, while avoiding large temperature fluctuations, which is conducive to the survival of the bacterial community in the biological aeration filter. The tank body is fitted with an outer shell, and the tank body and the outer shell are sealed together. An isolation layer is set between the outer shell and the silicone rubber heating strips. The isolation layer is used to seal the working space of the silicone rubber heating strips, which can isolate the silicone rubber heating strips from the outside environment and prevent them from being corroded, aged or damaged by the outside environment. The outside of the isolation layer is also filled with an insulation layer. The insulation layer is made of heat-insulating material, which can keep the heat insulated and reduce heat loss, thereby reducing energy consumption.

[0008] Furthermore, the outside of the storage tank is equipped with a sliding rail, and the bottom of the storage tank has an inverted conical structure, which facilitates solution discharge. The bottom outlet of the storage tank is connected to a drain hose. The inside of the storage tank contains a pH-adjusting solution, and the top of the storage tank is equipped with a sealable top cover to ensure the airtightness of the storage tank and facilitate subsequent cleaning and solution replenishment.

[0009] Furthermore, the top of the slow reversible motor is movably inserted into the slide rail, and the power cord of the slow reversible motor can be adapted to the range of motion of the slow reversible motor. The slow reversible motor is controlled by a pH controller. The detection probe of the pH controller is located inside the tank and detects the pH value inside the tank in real time. When the pH value needs to be adjusted, the pH controller controls the slow reversible motor of the corresponding storage tank to work, so as to realize the corresponding solution discharge and achieve the effect of pH adjustment. The bottom of the slow reversible motor is connected to a connecting frame, and the bottom end of the connecting frame extends to the bottom of the storage tank for the installation and connection of the rotating rod.

[0010] Furthermore, the rotating rod is rotatably connected to the bottom of the connecting frame, and the other end of the rotating rod is provided with a slot. A plug is movably inserted into the slot, and the plug is connected to the inside of the slot through a telescopic spring. A long strip structure is provided on the outside of the plug, which is locked in the slot. The plug can only move telescopically within the slot and cannot rotate relative to the slot.

[0011] Furthermore, the rotating block is rotatably connected to the bottom of the storage tank, and the rotating block is coaxial with the rotating rod. A slot is provided at one end of the rotating block near the insertion block. The internal structure of the slot corresponds to the structure of the outer end of the insertion block. Three protrusions are evenly distributed on the outside of the rotating block. When the protrusions rotate, they can squeeze the drainage hose.

[0012] Furthermore, the gear transmission assembly consists of two gears and a gear belt meshing with them. The two gears are respectively connected to the output shaft of the slow-speed reversible motor and the outside of the rotating rod, so that the slow-speed reversible motor can drive the stirring rod and the rotating rod to rotate simultaneously when it is working.

[0013] Furthermore, the stirring rod is movably connected to the output shaft of the slow-speed reversible motor via a damping shaft. A portion of the stirring rod located outside the storage tank is threaded, and the stirring rod is threaded to the side of the storage tank. The portion of the stirring rod inside the storage tank is connected to a connector, which is rotatably and sealingly connected to the storage tank. The other end of the connector is sealed to the inner wall of the storage tank via a retractable structure, ensuring the airtightness of the storage tank and the normal movement of the stirring rod. Several blades are provided at one end of the stirring rod inside the storage tank, and the range of motion of these blades can cover most of the space inside the storage tank, effectively stirring and mixing the solution within.

[0014] Furthermore, the damping force required for the rotation of the damping shaft connected to the output shaft of the slow-speed reversible motor is greater than the frictional force between the thread on the stirring rod and the storage tank. This allows the slow-speed reversible motor to first drive the stirring rod to move relative to the storage tank through the thread, and then only drive the rotating rod to rotate. This allows for stirring before the solution inside the storage tank is discharged, ensuring the uniformity of the discharged solution and avoiding the problem of large pH fluctuations caused by solution sedimentation and high concentration of the discharged solution. This is beneficial for the survival of the bacterial community in the biological aeration filter. In addition, the length of the external thread of the stirring rod is the same as the distance between the outer end of the insert block and the inside of the slot, and the thread on the stirring rod is located outside the storage tank in the initial state. This allows the system to stir the solution inside the storage tank before controlling the discharge of the solution.

[0015] The present invention has the following beneficial effects: 1. This invention, by adding a silicone rubber heating belt to the outside of the biological aeration filter, can meet the treatment needs of chemical wastewater, avoid problems such as corrosion of heating components by wastewater, and also achieve uniform heating inside the biological aeration filter, avoiding overheating in certain areas and affecting the bacterial community. Furthermore, by setting a heat insulation layer on the outside of the filter, heat loss can be reduced, related accessories can be protected, and the energy consumption of the system can be reduced.

[0016] 2. This invention, by setting stirring blades inside the storage tank and setting part of its rod as a threaded rod, and by cooperating with the motor and transmission components, can achieve the effect of stirring and mixing the solution inside the storage tank before discharge, thereby ensuring the uniformity of the discharged solution, avoiding the problem of large pH fluctuations, and facilitating the survival of the bacterial community.

[0017] 3. This invention utilizes a spring-loaded movable connecting block, which facilitates its docking with the slot, thereby controlling the rotation of the rotating block and achieving the effect of discharging the corresponding regulating solution. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the invention; Figure 2 This is a partial cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the external structure of the liquid storage tank in this invention; Figure 5 This is a partial cross-sectional structural diagram of the liquid storage tank in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 7For the present invention Figure 5 Enlarged structural diagram at point C; Figure 8 This is a bottom view of the liquid storage tank in this invention.

[0019] In the diagram: 1. Tank body; 101. Silicone rubber heating belt; 102. pH controller; 103. Water distribution tank; 2. Storage tank; 21. Slide rail; 22. Drain hose; 3. Outer shell; 31. Insulation layer; 32. Isolation layer; 4. Stirring rod; 41. Connector; 5. Slow-speed reversible motor; 51. Connecting frame; 6. Rotating rod; 61. Insert block; 62. Slot; 7. Rotating block; 71. Slot; 8. Gear transmission assembly. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1 A biological aerated filter microbial community preservation system suitable for chemical wastewater treatment includes a control system and a tank body 1. A water distribution tank 103 is configured on the outside of the tank body 1, and a drainage pipe is set on the other side of the tank body 1. The inside of the tank body 1 is configured with biological filter media, aeration pipes, filter heads, backwash air inlet pipes, and backwash water inlet pipes. Wastewater enters the tank body 1 through the filter heads at the bottom of the tank body 1 via the water distribution tank 103 and passes through the filter media layer. The pollutants in the chemical wastewater are intercepted by the filter media layer and degraded by the microorganisms attached to the filter media layer. The purified water passes through the filter media layer and is discharged from the drainage channel at the top of the tank body 1. At the same time, the aeration pipe also introduces oxygen into the tank body 1 to ensure the normal decomposition needs of the microorganisms inside the tank body 1. The working principle of the biological aerated filter is well described in the prior art and will not be repeated here.

[0022] Please see Figure 2-3The tank body 1 is made of corrosion-resistant alloy material, which can meet the treatment requirements of chemical wastewater. A silicone rubber heating belt 101 is installed on the outer wall of the tank body 1, and is evenly wound around the outer wall and driven and controlled by the control system. A temperature controller is also installed inside the tank body 1 to detect the internal temperature and control the operation of the silicone rubber heating belt 101, ensuring that the internal temperature of the tank body 1 is maintained within a suitable range for the bacterial community, while avoiding drastic temperature fluctuations, which is beneficial for the survival of the bacterial community in the biological aeration filter. An outer shell 3 is fitted around the tank body 1. The enclosure 3 and the silicone rubber heating band 101 are sealed together. An isolation layer 32 is provided between the outer shell 3 and the silicone rubber heating band 101. The isolation layer 32 is used to seal the working space of the silicone rubber heating band 101, which can isolate the external environment and prevent the silicone rubber heating band 101 from being corroded by the external environment and aging or damaged. The outside of the isolation layer 32 is also filled with a heat insulation layer 31. The heat insulation layer 31 is made of heat insulation and heat insulation material, which can achieve the effect of heat insulation and heat insulation, reduce heat loss, and thus reduce energy consumption. In addition, a temperature measuring device is installed inside the pool body 1, which can detect the temperature in real time and transmit the information to the control system, thereby controlling the operation of the silicone rubber heating band 101.

[0023] Please see Figure 1 A pH controller 102 is installed on the outside of tank 1, and a liquid storage tank 2 is installed on one side above tank 1. (See reference) Figure 5 The storage tank 2 has a slide rail 21 on its outer side. The bottom of the storage tank 2 has an inverted conical structure, which facilitates solution discharge. The bottom outlet of the storage tank 2 is connected to a drain hose 22. The storage tank 2 contains a pH-adjusting solution. The top of the storage tank 2 is equipped with a sealable top cover to ensure the airtightness of the storage tank 2 and facilitate subsequent cleaning and solution replenishment. The storage tank 2 has a stirring rod 4 inside, and a slow-speed reversible motor 5 is equipped at the outer end of the stirring rod 4. The output shaft of the slow reversible motor 5 is movably connected to the stirring rod 4. The slow reversible motor 5 is controlled by the pH controller 102. The part of the stirring rod 4 located outside the storage tank 2 is threaded. A rotating rod 6 is arranged below the slow reversible motor 5. A gear transmission assembly 8 is connected to the outside of the output shaft of the slow reversible motor 5. The other end of the gear transmission assembly 8 is connected to the rotating rod 6. A rotating block 7 is arranged at the top of the rotating rod 6, and the rotating block 7 is installed below the storage tank 2.

[0024] Please see Figure 4The top of the slow-speed reversible motor 5 is movably inserted into the slide rail 21, and the power cord of the slow-speed reversible motor 5 is compatible with the range of motion of the slow-speed reversible motor 5. The slow-speed reversible motor 5 is controlled by the pH controller 102. The detection probe of the pH controller 102 is located inside the tank 1 and detects the pH value inside the tank 1 in real time. When the pH value needs to be adjusted, the pH controller 102 controls the slow-speed reversible motor 5 of the corresponding storage tank 2 to work, realize the corresponding solution discharge, and achieve the effect of pH adjustment. Then, it controls the slow-speed reversible motor 5 to reverse and return to its original position, while controlling the rotating block 7 to squeeze the drainage hose 22 to ensure the sealing of the inside of the storage tank 2. The bottom of the slow-speed reversible motor 5 is connected to a connecting bracket 51, the bottom end of which extends to the bottom of the storage tank 2 for the installation and connection of the rotating rod 6. (See reference...) Figure 7 The rotating rod 6 is rotatably connected to the bottom of the connecting frame 51, and the other end of the rotating rod 6 is provided with a slot 62. The slot 62 is movably inserted with a plug 61. The plug 61 is connected to the inside of the slot 62 through a telescopic spring. The plug 61 is provided with a long strip structure on its outer side. This structure is locked in the slot 62. The plug 61 can only move telescopically within the slot 62 and cannot rotate relative to the slot 62.

[0025] Please see Figure 7-8 The rotating block 7 is rotatably connected to the bottom of the liquid storage tank 2, and the rotating block 7 is coaxial with the rotating rod 6. The end of the rotating block 7 near the insertion block 61 is provided with a slot 71. The internal structure of the slot 71 corresponds to the structure of the outer end of the insertion block 61. Three protrusions are evenly distributed on the outside of the rotating block 7. When the protrusions rotate, they can squeeze the drainage hose 22. The protrusions squeeze the drainage hose 22 to seal the drainage hose 22, ensuring that the liquid inside the liquid storage tank 2 will not be discharged. At the same time, the protrusions leave the drainage hose 22 to discharge the solution. The specific principle can be referred to as the drainage principle of the peristaltic pump.

[0026] Please see Figure 4 The gear transmission assembly 8 consists of two gears and a gear belt meshing with them. The two gears are respectively connected to the output shaft of the slow reversible motor 5 and the outside of the rotating rod 6, so that the slow reversible motor 5 can drive the stirring rod 4 and the rotating rod 6 to rotate simultaneously when it is working.

[0027] Please see Figure 6The stirring rod 4 is movably connected to the output shaft of the slow-speed reversible motor 5 via a damping rotating shaft. A portion of the stirring rod 4 located outside the storage tank 2 is threaded, and the stirring rod 4 is threaded to the side of the storage tank 2. The portion of the stirring rod 4 located inside the storage tank 2 is connected to a connector 41, which is rotatably sealed to the storage tank 2. The other end of the connector 41 is sealed to the inner wall of the storage tank 2 via a retractable structure, ensuring the airtightness of the storage tank 2 and the normal movement of the stirring rod 4. One end of the stirring rod 4 located inside the storage tank 2 is equipped with several blades. The range of motion of these blades can cover most of the space inside the storage tank 2, effectively stirring and mixing the solution inside. The stirring rod 4 is connected to the slow-speed reversible motor 5. The damping force required for the damping shaft connected to the output shaft of motor 5 to rotate is greater than the frictional force between the thread on the stirring rod 4 and the storage tank 2. This allows the slow-speed reversible motor 5 to first drive the stirring rod 4 to move relative to the storage tank 2 through the thread, and then only drive the rotating rod 6 to rotate. This allows for stirring before the solution inside the storage tank 2 is discharged, ensuring the uniformity of the discharged solution and avoiding the problem of large pH fluctuations caused by solution sedimentation and high concentration of the discharged solution. This is beneficial for the survival of bacteria in the biological aeration filter. Furthermore, the length of the external thread of the stirring rod 4 is the same as the distance between the outer end of the insert 61 and the inside of the slot 71. In the initial state, the thread on the stirring rod 4 is located outside the storage tank 2, allowing the system to stir the solution inside the storage tank 2 before controlling the discharge of the solution.

[0028] The storage tank 2 can be set into two sets, which respectively hold acidic and alkaline adjustment solutions, and the discharge of the two solutions is controlled according to the measurement value of the pH controller 102.

[0029] In addition, the rotating block 7 can be installed at the bottom of the liquid storage tank 2 by means of a rotating shaft and a torsion spring shaft connection, so that the rotating block 7 can be in the state of squeezing the drain hose 22 after the rotating rod 6 leaves, thus ensuring the sealing of the drain hose 22.

[0030] The working principle of this invention is as follows: The biological aeration filter is buried in the corresponding working area, the corresponding lines are connected, and after being set up according to production needs, it is put into use. Chemical wastewater enters the tank 1 through the water distribution tank 103 and the filter head at the bottom of the tank 1, and passes through the filter media layer. The pollutants in the chemical wastewater are intercepted by the filter media layer and degraded by the microorganisms attached to the filter media layer. The purified water passes through the filter media layer and is discharged from the drainage channel at the top of the tank 1. At the same time, the aeration pipe also introduces oxygen into the tank 1 to ensure the normal decomposition needs of the microorganisms inside the tank 1. The working principle of the biological aeration filter is well described in the prior art and will not be repeated here. The detection probe of the pH controller 102 detects the pH value inside the tank 1. According to the fluctuation of the pH value, the slow reversible motor 5 on the corresponding storage tank 2 is controlled to work. When the slow reversible motor 5 is working, its output shaft rotates slowly, causing the stirring rod 4 to rotate. The external thread of the stirring rod 4 is connected to the storage tank. 2. Engagement: The stirring rod 4 gradually moves into the storage tank 2. The blades of the stirring rod 4 inside the storage tank 2 simultaneously agitate the interior of the storage tank 2, achieving solution mixing. At the same time, the slow-speed reversible motor 5 also moves closer to the storage tank 2 along the slide rail 21. When the thread on the outside of the stirring rod 4 reaches its end, the stirring rod 4 stops working. The output shaft of the slow-speed reversible motor 5 continues to rotate relative to the stirring rod 4, while simultaneously driving the rotating rod 6 to continue rotating. The rotating rod 6 then moves closer to the rotating rod 6 as the slow-speed reversible motor 5 moves. The insert block 61 engages with the slot 71. The rotating rod 6 rotates and drives the rotating block 7 to rotate, allowing the solution inside the storage tank 2 to be discharged from the drain hose 22. When the pH value is about to reach the limit range, the system controls the slow-speed reversible motor 5 to reverse, causing both the stirring rod 4 and the rotating rod 6 to return to their initial positions. At the same time, the rotating block 7 is finally fixed in the position of squeezing the drain hose 22, achieving the sealing of the bottom of the storage tank 2.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment, comprising a control system and a tank (1), wherein a water distribution tank (103) is configured on the outside of the tank (1), a drainage pipe is provided on the other side of the tank (1), and biological filter media, aeration pipes, filter heads, backwash air inlet pipes and backwash water inlet pipes are configured inside the tank (1), characterized in that: A pH controller (102) is installed on the outside of the pool body (1). A storage tank (2) is installed on one side above the pool body (1). A stirring rod (4) is installed inside the storage tank (2). A slow reversible motor (5) is installed at the outer end of the stirring rod (4). The output shaft of the slow reversible motor (5) is movably connected to the stirring rod (4). At the same time, the slow reversible motor (5) is controlled by the pH controller (102). The part of the stirring rod (4) located outside the storage tank (2) is threaded. A rotating rod (6) is installed below the slow reversible motor (5). A gear transmission assembly (8) is connected to the outside of the output shaft of the slow reversible motor (5). The other end of the gear transmission assembly (8) is connected to the rotating rod (6). A rotating block (7) is installed at the top of the rotating rod (6). The rotating block (7) is installed below the storage tank (2).

2. The biological aeration filter microbial community preservation system for chemical wastewater treatment according to claim 1, characterized in that: The pool body (1) is made of corrosion-resistant alloy material. The outer wall of the pool body (1) is provided with a silicone rubber heating belt (101). The silicone rubber heating belt (101) is driven by the control system. The pool body (1) is fitted with an outer shell (3). The pool body (1) and the outer shell (3) are sealed together. An isolation layer (32) is provided between the outer shell (3) and the silicone rubber heating belt (101). The outer side of the isolation layer (32) is filled with a heat insulation layer (31). The heat insulation layer (31) is made of heat insulation and heat insulation material.

3. The biological aeration filter microbial community preservation system for chemical wastewater treatment according to claim 1, characterized in that: The storage tank (2) is provided with a slide rail (21) on the outside, the bottom of the storage tank (2) is an inverted conical structure, and the bottom outlet of the storage tank (2) is connected to a drain hose (22). The storage tank (2) is filled with a pH-adjustable solution, and the top of the storage tank (2) is equipped with a top cover that can seal the inside.

4. The biological aeration filter microbial community preservation system for chemical wastewater treatment according to claim 3, characterized in that: The top of the slow reversible motor (5) is movably inserted into the slide rail (21), and the power cord of the slow reversible motor (5) can be adapted to the range of motion of the slow reversible motor (5). The slow reversible motor (5) is controlled by the pH controller (102). The bottom of the slow reversible motor (5) is connected to a connecting frame (51), and the bottom end of the connecting frame (51) extends to the bottom of the liquid storage tank (2).

5. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment according to claim 4, characterized in that: The rotating rod (6) is rotatably connected to the bottom end of the connecting frame (51), and the other end of the rotating rod (6) is provided with a slot (62). A plug (61) is movably inserted into the slot (62). At the same time, the plug (61) is connected to the inside of the slot (62) through a telescopic spring. A long strip structure is provided on the outside of the plug (61). This structure is snapped into the slot (62). The plug (61) can only move telescopically within the slot (62).

6. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment according to claim 5, characterized in that: The rotating block (7) is rotatably connected to the bottom of the liquid storage tank (2), and the rotating block (7) is coaxial with the rotating rod (6). The rotating block (7) has a slot (71) at one end near the insert (61). The internal structure of the slot (71) corresponds to the structure of the outer end of the insert (61). The rotating block (7) has three evenly distributed protrusions on its exterior. When the protrusions rotate, they can squeeze the drain hose (22).

7. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment according to claim 6, characterized in that: The gear transmission assembly (8) consists of two gears and a gear belt meshing with them. The two gears are respectively connected to the output shaft of the slow reversible motor (5) and the outside of the rotating rod (6).

8. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment according to claim 7, characterized in that: The stirring rod (4) is movably connected to the output shaft of the slow reversible motor (5) via a damping shaft. A portion of the stirring rod (4) located outside the storage tank (2) is threaded. The stirring rod (4) is threaded to the side of the storage tank (2). A connecting piece (41) is connected to the portion of the stirring rod (4) located inside the storage tank (2). The connecting piece (41) is rotatably and sealed to the storage tank (2). The other end of the connecting piece (41) is sealed to the inner wall of the storage tank (2) via a retractable structure. Several blades are provided at one end of the stirring rod (4) located inside the storage tank (2).

9. A biological aeration filter microbial community preservation system suitable for chemical wastewater treatment according to claim 8, characterized in that: The damping force required for the rotation of the damping shaft connected to the output shaft of the slow reversible motor (5) of the stirring rod (4) is greater than the friction between the thread on the stirring rod (4) and the storage tank (2). The length of the external thread of the stirring rod (4) is the same as the distance between the outer end of the insert (61) and the inside of the slot (71). In the initial state, the thread on the stirring rod (4) is located outside the storage tank (2).

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