Biological reaction device for water treatment and process for treating sewage

Abstract

This invention discloses a biological reactor for water treatment, comprising a container, a rotating shaft with a plumb bob mounted inside the container, a drive component for rotating the shaft, and biological anchors fixedly connected to the outer periphery of the shaft. The biological anchors include aerobic bacteria anchors, anoxic bacteria anchors, and anaerobic bacteria anchors arranged sequentially from top to bottom. The container has an aeration section above the uppermost aerobic bacteria anchor. In this device, the biological anchors are in contact with the wastewater. Driven by the drive component, the biological anchors rotate and agitate the wastewater. The oxygen content of the water is higher closer to the surface and lower further away from the surface, creating aerobic, anoxic, and anaerobic conditions within the container from top to bottom. The wastewater can be biologically treated by the bacterial colonies attached to the biological anchors. Increasing the rotational speed of the biological anchors around the shaft removes excess bacterial colonies and dirt attached to the biological anchors under centrifugal force. This invention also discloses a process for treating wastewater.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment technology, specifically to a biological reactor for water treatment and a process for treating wastewater. Background Technology

[0002] Biofilm technology is a biological treatment technology that purifies water by forming a biofilm of microorganisms that grow on the surface of a solid carrier. Biological rotating disc water treatment devices, as a type of biofilm wastewater treatment device, have been widely used in the treatment of petrochemical wastewater, domestic sewage, landfill leachate, etc.

[0003] Biological rotating disc water treatment devices generally consist of a reaction tank and a biological rotating disc device mounted above the reaction tank. The biological rotating disc device includes a rotating shaft and biological discs arranged around the rotating shaft that rotate with it. The disc-shaped biofilm portion of the biological rotating disc is submerged in the wastewater in the reaction tank. Microorganisms attached to the disc-shaped biofilm form a biofilm on the disc, thereby degrading organic matter in the wastewater and achieving purification. However, after long-term operation, the biofilm suspended on the rotating disc will continuously attach and thicken, leading to increased operating load on the device. The central part of the rotating shaft experiences the greatest bending moment, and the welded joints of the inner discs in the central part of the rotating shaft are prone to breakage.

[0004] Chinese invention patent application CN118479641A discloses a dual-effect biological rotating disc device and a wastewater treatment process. It includes a rotating shaft, inner discs fixed to the outer periphery of the middle of the rotating shaft, and outer discs fixed to the outer periphery of both ends of the rotating shaft. Several biofilm sheets are located between the inner and outer discs. A grid mesh is arranged between adjacent inner discs to form a cylindrical rotating cage, into which biofilm packing material can be placed. This device, by setting a grid mesh on the outer edge of the original inner discs on the rotating shaft to form a rotating cage, facilitates the modification of biological rotating disc devices and is suitable for wastewater treatment plants requiring in-situ upgrading. Simultaneously, the grid mesh connecting the middle of the rotating shaft and the inner discs also serves a reinforcing function, preventing breakage at the weld seam of the inner discs in the middle of the rotating shaft.

[0005] However, the technical solution disclosed in Chinese invention patent application publication number CN118479641A does not directly control the weight of the bacteria in the disc-shaped biofilm through equipment to avoid breakage at the weld of the inner disc in the middle of the rotating shaft. Moreover, in this solution, the oxygen supply to the aerobic bacteria is insufficient, and the contact between the bacteria and the sewage is not sufficient. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a biological reactor for wastewater treatment that can simultaneously utilize aerobic bacteria, anoxic bacteria and anaerobic bacteria for wastewater treatment, and that excessive aerobic bacteria, anoxic bacteria and anaerobic bacteria in the device can be directly removed by the device.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A biological reactor for water treatment includes a container, a rotating shaft with a plumb bob disposed in the container, a drive component for driving the rotating shaft to rotate, and a biological fixing component fixedly connected to the outer periphery of the rotating shaft.

[0009] The biological fixtures include aerobic bacteria fixtures, anoxic bacteria fixtures, and anaerobic bacteria fixtures arranged sequentially from top to bottom. The container has a ventilation section above the aerobic bacteria fixture at the top.

[0010] Preferably, in order to fix aerobic bacteria, anaerobic bacteria and anaerobic bacteria, the biological fixation element is a biological fixation disc, the aerobic bacteria fixation element is an aerobic bacteria fixation disc, the anaerobic bacteria fixation element is an anaerobic bacteria fixation disc and the anaerobic bacteria fixation element is an anaerobic bacteria fixation disc.

[0011] Preferably, in order to allow more aerobic bacteria on the aerobic bacteria fixing component to come into contact with air, the upper section of the rotating shaft is a hollow rotating shaft, an air inlet is provided at the end of the upper section of the rotating shaft, and an air outlet is provided on the outer wall of the upper section of the rotating shaft. The hollow rotating shaft is fixedly connected to the aerobic bacteria fixing plate, and the air outlet is located above the anaerobic bacteria fixing plate.

[0012] Preferably, in order to allow more aerobic bacteria on the aerobic bacteria fixing component to come into contact with air, the bottom aerobic bacteria fixing plate is provided with an upward guide plate, and the upper middle aerobic bacteria fixing plate is provided with a downward guide plate, a horizontal guide plate and an upward guide plate in sequence from the center to the outside.

[0013] Preferably, in order to provide aerobic, anaerobic, and / or anaerobic bacteria with different oxygen content environments, the rotating shaft includes an inner shaft and an outer shaft. The inner shaft is connected to a motor drive and fixedly connected to an aerobic bacteria fixing component. The outer shaft is fixedly connected to both the anaerobic and anaerobic bacteria fixing components. The outer shaft is sleeved on the outer circumference of the inner shaft and can achieve relative movement with respect to the inner shaft around the axis. The outer shaft and the inner shaft are connected through a differential system, which is used to control the rotation of the inner and outer shafts around the axis.

[0014] Preferably, in order for the aerobic bacteria in the aerobic bacteria fixture to obtain more oxygen, the angular velocity of the inner shaft rotation is greater than that of the outer shaft rotation.

[0015] Preferably, in order to provide a differential system, the differential system includes an inner shaft gear fixedly connected to the bottom of the inner shaft, a first gear meshing with the inner shaft gear, a second gear fixedly connected to the first gear and coaxial with it, and an outer shaft gear fixedly connected to the bottom of the outer shaft, wherein the outer shaft gear meshes with the second gear.

[0016] Preferably, in order to reduce the frictional force of rotation between the outer shaft and the inner shaft, the inner shaft and the outer shaft are rotatably connected by a bearing, and waterproof washers are provided at both ends of the bearing.

[0017] The second objective of this invention is to provide a wastewater treatment process, comprising the following steps:

[0018] S1: Inject wastewater into the container, ensuring the wastewater level is at least higher than the topmost aerobic bacteria fixing plate;

[0019] S2: Turn on the drive unit, which drives the biological fixation disc to rotate. Adjust the drive unit to make the liquid surface ripple.

[0020] S3: The wastewater in the container is tested every 1 hour. Once the wastewater reaches the standard for input into the next treatment stage, the water is discharged and wastewater is continuously injected into the container for treatment.

[0021] Preferably, in order to provide more oxygen to the aerobic bacteria on the aerobic bacteria fixation plate, the step between S2 and S3 further includes:

[0022] Insert the air supply hose into the shaft from the air inlet at the upper end of the shaft until the air outlet of the air supply hose reaches the position of the lowest air outlet hole inside the shaft. Then supply air. At this time, the air in the air supply hose will escape from the air outlet hole, forming bubbles that tend to rise.

[0023] The bubbles escaping from the bottom air vent are blocked by the aerobic bacteria fixing plate above. After contacting the aerobic bacteria fixing plate above, the centrifugal force slows down their upward speed and they move towards the edge of the bottom aerobic bacteria fixing plate. The upward guide plate of the bottom aerobic bacteria fixing plate prevents the bubbles from moving towards the anaerobic bacteria fixing plate.

[0024] In addition to being blocked by the aerobic bacteria fixing plate above and subjected to centrifugal force after contacting the aerobic bacteria fixing plate above, the bubbles escaping from the upper air outlet are also affected by the downward guide plate, horizontal guide plate and upward guide plate arranged sequentially from the center to the outside of the aerobic bacteria fixing plate in the upper part. They first sink downward, then diffuse horizontally outward, and finally turn upward outward.

[0025] The advantages and beneficial effects of this invention are as follows:

[0026] The biological fixture comes into contact with the sewage. Driven by the drive unit, the biological fixture rotates and agitates the sewage. The closer the water is to the surface, the higher the oxygen content, and the farther away the water is from the surface, the lower the oxygen content. The container forms aerobic, anoxic and anaerobic conditions from top to bottom. The sewage can be biologically treated by the colonies attached to the biological fixture.

[0027] Increasing the rotational speed of the biological fixation device around the axis removes excess bacterial colonies and dirt attached to the biological fixation device under centrifugal force.

[0028] The device has a reasonable structure, low failure rate, and is easy to manufacture. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the biological reactor for water treatment of the present invention;

[0030] Figure 2 yes Figure 1 An explosion diagram;

[0031] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the bioreactor for water treatment of the present invention from another perspective;

[0032] Figure 4 This is another structural schematic diagram of Embodiment 1 of the biological reactor for water treatment of the present invention;

[0033] Figure 5 yes Figure 4 An explosion diagram;

[0034] Figure 6 yes Figure 4 Enlarged view of part A;

[0035] Figure 7 yes Figure 5 Enlarged view of part B;

[0036] Figure 8 This is a schematic diagram of the structure of the anoxic bacteria fixing plate, the anaerobic bacteria fixing plate, part of the rotating shaft, and the aerobic bacteria fixing plate equipped with a guide plate in Embodiment 1 of the bioreactor for water treatment of the present invention.

[0037] Figure 9 yes Figure 8 Enlarged view of part C;

[0038] Figure 10 This is a schematic diagram of the transmission system, part of the inner shaft, and part of the outer shaft of Embodiment 2 of the bioreactor for water treatment of the present invention.

[0039] Figure 11 yes Figure 10 An explosion diagram;

[0040] Figure 12 This is a bottom view of the transmission system, part of the inner shaft, and part of the outer shaft of Embodiment 2 of the bioreactor for water treatment of the present invention;

[0041] Figure 13 yes Figure 10 Enlarged schematic diagram of part D;

[0042] Figure 14 This is a schematic diagram of the connection between the inner and outer shafts of Embodiment 2 of the bioreactor for water treatment of the present invention;

[0043] Figure 15 yes Figure 14 An explosion diagram;

[0044] Figure 16 yes Figure 14 Another diagram of an explosion.

[0045] In the diagram: 1. Container; 101. Ventilation section; 102. Drain outlet; 103. Shaft fixing component; 1031. Limiting part; 1032. Air inlet; 2. Drive component; 3. Shaft; 301. Inner shaft; 3011. Air outlet hole; 3012. Inner shaft gear; 302. Outer shaft; 3021. Outer shaft gear; 401. Aerobic bacteria fixing component; 4011. Downward guide plate; 4012. Horizontal guide plate; 4013. Upward guide plate; 402. Anaerobic bacteria fixing component; 403. Anaerobic bacteria fixing component; 501. First gear; 502. Second gear; 6. Waterproof gasket; 7. Bearing. Detailed Implementation

[0046] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0047] Example 1

[0048] like Figures 1-9 As shown, a biological reactor for water treatment according to Embodiment 1 of the present invention includes a container 1, a rotating shaft 3 with a plumb bob disposed in the container 1, a driving component 2 for driving the rotating shaft 3 to rotate, and biological fixing components fixedly connected to the outer periphery of the rotating shaft 3. The biological fixing components include an aerobic bacteria fixing component 401, an anaerobic bacteria fixing component 402 and an anaerobic bacteria fixing component 403 distributed sequentially from top to bottom. The container 1 has an aeration section 101 above the uppermost aerobic bacteria fixing component 401.

[0049] The biological fixation element is a biological fixation disc. The aerobic bacteria fixation element 401 is an aerobic bacteria fixation disc, the anoxic bacteria fixation element 402 is an anoxic bacteria fixation disc, and the anaerobic bacteria fixation element 403 is an anaerobic bacteria fixation disc.

[0050] In this embodiment, container 1 is a can-shaped reaction vessel. Near the top of container 1, there is a rotating shaft fixing member 103 inside. The rotating shaft fixing member 103 is fixedly connected to the inner wall of container 1. The rotating shaft fixing member 103 has a limiting part 1031. There is also a corresponding rotating shaft fixing part at the bottom of container 1. A rotating shaft 3 is installed in container 1 and cooperates with the limiting part 1031 and the rotating shaft 3 fixing part. The rotating shaft 3, the limiting part 1031, and the rotating shaft fixing part are all on the same plumb line, i.e., the rotating shaft 3 is installed in container 1. A driving member 2 is installed at the bottom of container 1 and is used to drive the rotating shaft 3 to rotate. To reduce the rotational resistance of the rotating shaft 3, the rotating shaft 3 is connected to the limiting part 1031 via a bearing. A biological fixation disc is detachably connected to the outer periphery of the rotating shaft 3.

[0051] Furthermore, container 1 has an open top. Specifically, the airflow in contact with the sewage surface inside container 1 increases, meaning that the total amount of air in contact with the sewage surface inside container 1 at the same time increases. This increases the oxygen content dissolved in the upper sewage, and the aerobic bacteria attached to the aerobic bacteria fixing plate are in an aerobic environment, resulting in high working efficiency.

[0052] Furthermore, the container 1 has a drain outlet 102 at the bottom. Specifically, the wastewater contains pollutants with a higher density than water, which will settle to the bottom of the container 1, and placing the drain outlet 102 at the bottom of the container 1 facilitates the collection of these pollutants.

[0053] In this embodiment, the bioreactor for water treatment operates by first injecting wastewater into container 1, ensuring the wastewater level is at least above the uppermost aerobic bacterial fixation plate. Then, the drive unit 2 is activated, causing the biological fixation plate to rotate. Adjusting the drive unit 2 causes the liquid surface to churn, creating conditions in container 1 that sequentially represent aerobic, anoxic, and anaerobic environments from top to bottom. The wastewater in the container is then tested every hour. Once the wastewater meets the standards for the next treatment stage, the water is drained, and wastewater is continuously injected into container 1 for further treatment. Furthermore, when excessive bacterial colonies and / or dirt adhere to the biological fixation plate, the drive unit 2 is adjusted, increasing the rotational speed of the biological fixation plate around the shaft 3. This centrifugal force removes the excess bacterial colonies and / or dirt from the biological fixation plate.

[0054] Furthermore, the upper section of the rotating shaft 3 is a hollow rotating shaft, and an air inlet is provided at the end of the upper section of the rotating shaft 3. An air outlet 3011 is provided on the outer wall of the upper section of the rotating shaft 3. The hollow rotating shaft is fixedly connected to the aerobic bacteria fixing plate, and the air outlet 3011 is located above the anoxic bacteria fixing plate.

[0055] Specifically, wastewater generally has a low oxygen content. When the oxygen content is too low, simply increasing the oxygen content by stirring the water is insufficient to meet the oxygen requirements of the aerobic bacteria on the aerobic bacteria mounting plate. The upper section of the rotating shaft 3 is a hollow shaft, and its outer wall is provided with an air outlet 3011. When air is introduced through the air inlet at the end of the upper section of the rotating shaft 3, the oxygen content of the upper wastewater increases, which can meet the oxygen requirements of the aerobic bacteria on the aerobic bacteria mounting plate. To facilitate the introduction of air through the end of the upper section of the rotating shaft 3, the rotating shaft fixing component 103 has an air inlet 1032. The air supply hose is inserted from the air inlet 1032 and extends into the rotating shaft 3 from the air inlet at the upper end of the rotating shaft 3 until the air outlet of the air supply hose extends into the rotating shaft 3 to the position corresponding to the lowest air outlet 3011. Then, air is supplied, and the air in the air supply hose escapes from the air outlet 3011, forming bubbles.

[0056] Furthermore, the bottom aerobic bacteria fixing plate is provided with an upward guide plate 4013, and the middle and upper aerobic bacteria fixing plate is provided with a downward guide plate 4011, a horizontal guide plate 4012 and an upward guide plate 4013 in sequence from the center to the outside.

[0057] Specifically, air inside the air supply hose escapes from the air outlet 3011, forming bubbles that tend to rise; the guide plate guides the water flow.

[0058] The air bubbles escaping from the bottom air outlet 3011 are blocked by the upper aerobic bacteria fixed plate. Under the centrifugal force generated after contacting the upper aerobic bacteria fixed plate, the rising speed is slowed down and they move towards the edge of the bottom aerobic bacteria fixed plate. The contact time between the air bubbles and the bottom aerobic bacteria fixed plate is longer, and the bottom aerobic bacteria fixed plate obtains more oxygen, which improves the effect of wastewater treatment. Meanwhile, the upward guide plate 4013 of the bottom aerobic bacteria fixed plate prevents the air bubbles from moving towards the anoxic bacteria fixed plate.

[0059] In addition to being blocked by the upper aerobic bacteria fixing plate and subjected to centrifugal force after contacting the upper aerobic bacteria fixing plate, the air bubbles escaping from the upper air outlet 3011 are also affected by the downward guide plate 4011, the horizontal guide plate 4012 and the upward guide plate 4013 arranged sequentially from the center to the outside of the upper aerobic bacteria fixing plate. They tend to sink downward first, then diffuse horizontally outward, and finally rise outward. This prolongs the contact time between the air and the aerobic bacteria on the aerobic bacteria fixing plate, and increases the contact area and contact probability between the air and the aerobic bacteria on the aerobic bacteria fixing plate.

[0060] In addition, the aerobic bacteria fixing plate at the bottom is equipped with an upward guide plate 4013, which also helps to balance the upward and downward floating pressure of the rotating shaft 3.

[0061] Example 2

[0062] like Figures 10-16 As shown, the water treatment bioreactor of Embodiment 2 of the present invention is based on Embodiment 1, but differs in that:

[0063] The rotating shaft 3 includes an inner shaft 301 and an outer shaft 302. The inner shaft 301 is connected to a motor drive and is fixedly connected to an aerobic bacteria fixing component 401. The outer shaft 302 is fixedly connected to an anaerobic bacteria fixing component 401 and an anaerobic bacteria fixing component 403. The outer shaft 302 is sleeved on the outer circumference of the inner shaft 301 and can realize relative movement with respect to the inner shaft 302 around the axis. The outer shaft 302 and the inner shaft 301 are connected through a differential system. The differential system is used to control the rotation of the inner shaft 301 and the outer shaft around the axis.

[0064] The angular velocity of the inner shaft 301 is greater than that of the outer shaft 302.

[0065] The differential system includes an inner shaft gear 3012 fixedly connected to the bottom of the inner shaft 301, a first gear 501 meshing with the inner shaft gear 3012, a second gear 502 fixedly connected to the first gear 501 and coaxial with it, and an outer shaft gear 3021 fixedly connected to the bottom of the outer shaft 302. The outer shaft gear 3021 meshes with the second gear 502. Furthermore, the outer diameter of the outer shaft gear 3021 is larger than the outer diameter of the inner shaft gear 3012, the outer diameter of the inner shaft gear 3012 is larger than the outer diameter of the first gear 501, and the outer diameter of the first gear 501 is larger than the outer diameter of the second gear 502.

[0066] Specifically, the driving component 2 includes a motor and a reducer. The inner shaft 301 is connected to the motor through the reducer. The inner shaft gear 3012, fixedly connected to the inner shaft 301, can be considered the driving gear. The first gear 501 and the second gear 502 rotate under the drive of the inner shaft gear 3012, and the outer shaft gear 3021 rotates under the drive of the second gear 502. Furthermore, the outer diameter of the outer shaft gear 3021 is larger than the outer diameter of the inner shaft gear 3012, the outer diameter of the inner shaft gear 3012 is larger than the outer diameter of the first gear 501, and the outer diameter of the first gear 501 is larger than the outer diameter of the second gear 502. That is, the angular velocity of the inner shaft gear 3012 is greater than the angular velocity of the outer shaft gear 3021. The angular velocity of the inner shaft 301 is greater than that of the outer shaft 302. For the aerobic bacteria fixing plate connected to the inner shaft 301 and the anoxic bacteria fixing plate and anaerobic bacteria fixing plate connected to the outer shaft 302, the angular velocity of the aerobic bacteria fixing plate around the rotating shaft 3 is greater than that of the anoxic bacteria fixing plate and the anaerobic bacteria fixing plate around the rotating shaft 3. The high-speed rotating aerobic bacteria fixing plate can agitate more water droplets on the surface of the sewage, which is conducive to more contact with air, i.e., obtaining more oxygen. The anoxic bacteria fixing plate and the anaerobic bacteria fixing plate located in the lower part of the container rotate around the rotating shaft 3 only to make more sufficient contact with the sewage. Their lower angular velocity around the rotating shaft 3 can reduce the overall power consumption of the motor.

[0067] Furthermore, the inner shaft 301 and the outer shaft 302 are rotatably connected by a bearing 7, and waterproof washers 6 are provided at both ends of the bearing 7.

[0068] Specifically, after the inner shaft 301 and the outer shaft 302 are connected by the bearing 7, the friction force is smaller when they rotate relative to each other, which increases the service life of the inner shaft 301 and the outer shaft 302 and reduces the energy consumption of the equipment. However, since the inner shaft 301 and the outer shaft 302 work in sewage for a long time, the bearing 7 is easily blocked or corroded by sewage. Waterproof gaskets 6 are provided at both ends of the bearing 7 to facilitate the long-term operation of the bearing 7 in sewage.

[0069] The present invention also provides a process for treating wastewater using the above-mentioned equipment, the process comprising:

[0070] S1: Inject wastewater into container 1, ensuring the wastewater level is at least higher than the uppermost aerobic bacteria fixing plate;

[0071] S2: Turn on drive component 2. Drive component 2 drives the biological fixation plate to rotate. Adjust drive component 2 to make the liquid surface ripple.

[0072] S3: The wastewater in the container is tested every 1 hour. Once the wastewater reaches the standard for input into the next treatment stage, the water is discharged and wastewater is continued to be injected into container 1 for treatment.

[0073] Furthermore, the interval between steps S2 and S3 also includes:

[0074] Insert the air supply hose into the air inlet 1032 and extend it into the rotating shaft 3 from the air inlet at the upper end of the rotating shaft 3 until the air outlet of the air supply hose extends into the rotating shaft 3 at the position corresponding to the lowest air outlet 3011. Then supply air. At this time, the air in the air supply hose escapes from the air outlet 3011, forming bubbles, which tend to rise.

[0075] The air bubbles escaping from the bottom air outlet 3011 are blocked by the upper aerobic bacteria fixed plate. Under the centrifugal force generated after contacting the upper aerobic bacteria fixed plate, the rising speed is slowed down and they move towards the edge of the bottom aerobic bacteria fixed plate. The contact time between the air bubbles and the bottom aerobic bacteria fixed plate is longer, and the bottom aerobic bacteria fixed plate obtains more oxygen, which improves the effect of wastewater treatment. Meanwhile, the upward guide plate 4013 of the bottom aerobic bacteria fixed plate prevents the air bubbles from moving towards the anoxic bacteria fixed plate.

[0076] In addition to being blocked by the upper aerobic bacteria fixing plate and subjected to centrifugal force after contacting the upper aerobic bacteria fixing plate, the air bubbles escaping from the upper air outlet 3011 are also affected by the downward guide plate 4011, the horizontal guide plate 4012 and the upward guide plate 4013 arranged sequentially from the center to the outside of the upper aerobic bacteria fixing plate. They tend to sink downward first, then diffuse horizontally outward, and finally rise outward. This prolongs the contact time between the air and the aerobic bacteria on the aerobic bacteria fixing plate, and increases the contact area and contact probability between the air and the aerobic bacteria on the aerobic bacteria fixing plate.

[0077] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bioreactor for water treatment, comprising a container (1), a rotating shaft (3) with a plumb bob disposed in the container (1), a driving component (2) for driving the rotating shaft (3) to rotate, and a biological fixing component fixedly connected to the outer periphery of the rotating shaft (3), characterized in that: The biological fixtures include an aerobic bacteria fixture (401), an anaerobic bacteria fixture (402), and an anaerobic bacteria fixture (403) arranged sequentially from top to bottom. The container (1) has a ventilation section (101) above the uppermost aerobic bacteria fixture (401). The biological fixation component is a biological fixation disc, the aerobic bacteria fixation component (401) is an aerobic bacteria fixation disc, the anaerobic bacteria fixation component (402) is an anaerobic bacteria fixation disc, and the anaerobic bacteria fixation component (403) is an anaerobic bacteria fixation disc; The upper section of the rotating shaft (3) is a hollow rotating shaft. An air inlet is provided at the end of the upper section of the rotating shaft (3). An air outlet (3011) is provided on the outer wall of the upper section of the rotating shaft (3). The hollow rotating shaft is fixedly connected to the aerobic bacteria fixing plate. The air outlet (3011) is located above the anaerobic bacteria fixing plate. The bottom aerobic bacteria fixing plate is provided with an upward guide plate (4013), and the middle and upper aerobic bacteria fixing plate is provided with a downward guide plate (4011), a horizontal guide plate (4012) and an upward guide plate (4013) from the center to the outside.

2. The biological reactor for water treatment according to claim 1, characterized in that, The rotating shaft (3) includes an inner shaft (301) and an outer shaft (302). The inner shaft (301) is connected to a motor drive and is fixedly connected to the aerobic bacteria fixing component (401). The outer shaft (302) is fixedly connected to the anoxic bacteria fixing component (402) and the anaerobic bacteria fixing component (403). The outer shaft (302) is sleeved on the outer circumference of the inner shaft (301) and can realize relative movement with respect to the inner shaft around the axis. The outer shaft (302) and the inner shaft (301) are connected through a differential system. The differential system is used to control the rotation of the inner shaft (301) and the outer shaft (302) around the axis.

3. The biological reactor for water treatment according to claim 2, characterized in that, The angular velocity of the inner shaft (301) is greater than that of the outer shaft (302).

4. The biological reactor for water treatment according to claim 3, characterized in that, The differential system includes an inner shaft gear (3012) fixedly connected to the bottom of the inner shaft (301), a first gear (501) meshing with the inner shaft gear (3012), a second gear (502) fixedly connected to the first gear (501) and coaxial, and an outer shaft gear (3021) fixedly connected to the bottom of the outer shaft (302), wherein the outer shaft gear (3021) meshes with the second gear (502).

5. The biological reactor for water treatment according to claim 3, characterized in that, The inner shaft (301) and the outer shaft (302) are rotatably connected by a bearing (7), and waterproof washers (6) are provided at both ends of the bearing (7).

6. A process for treating wastewater using the biological reactor for water treatment as described in claim 1, characterized in that, Includes the following steps: S1: Inject wastewater into container (1), with the wastewater level at least higher than the uppermost aerobic bacteria fixing plate; S2: Turn on the drive unit (2), the drive unit (2) drives the biological fixation plate to rotate, adjust the drive unit (2) to make the liquid surface splash; S3: The wastewater in the container is tested every 1 hour. Once the wastewater reaches the standard for input into the next treatment stage, the water is discharged and wastewater is continued to be injected into the container (1) for treatment.

7. The wastewater treatment process according to claim 6, characterized in that, The steps S2 and S3 also include: Insert the air supply hose into the rotating shaft (3) from the air inlet at the upper end of the rotating shaft (3) until the air outlet of the air supply hose extends into the rotating shaft (3) to the position corresponding to the lowest air outlet (3011). Then supply air. At this time, the air in the air supply hose runs out from the air outlet (3011), forming bubbles, and tends to float upward. The bubbles escaping from the bottom air outlet (3011) are blocked by the upper aerobic bacteria fixing plate. Under the centrifugal force brought about by contact with the upper aerobic bacteria fixing plate, the upward speed is slowed down and they move towards the edge of the bottom aerobic bacteria fixing plate. The upward guide plate (4013) of the bottom aerobic bacteria fixing plate prevents the bubbles from moving towards the anaerobic bacteria fixing plate. In addition to being blocked by the upper aerobic bacteria fixing plate and subjected to centrifugal force after contacting the upper aerobic bacteria fixing plate, the bubbles escaping from the upper air outlet (3011) are also affected by the downward guide plate (4011), horizontal guide plate (4012) and upward guide plate (4013) arranged sequentially from the center to the outside of the upper aerobic bacteria fixing plate. They first sink downward, then diffuse horizontally outward, and finally turn upward outward.

Images