Biological reaction device for water treatment and process for treating sewage

Abstract

The invention discloses a biological reaction device for water treatment, which comprises a container, a rotating shaft with a plumb bob arranged in the container, a driving part for driving the rotating shaft to rotate, and a biological fixing part fixedly connected to the periphery of the rotating shaft, and the biological fixing part comprises an aerobic bacteria fixing part, an anoxic bacteria fixing part and an anaerobic bacteria fixing part which are sequentially distributed from top to bottom, and the container is provided with a ventilation part above the uppermost aerobic bacterium fixing piece. In the device, a biological fixing part is in contact with sewage, the biological fixing part is driven by a driving part to rotate and stir the sewage, the oxygen content of a water body closer to the water surface is higher, the oxygen content of a water body farther away from the water surface is lower, and aerobic, anoxic and anaerobic conditions are sequentially formed in a container from top to bottom; the sewage can be biologically treated through bacterial colonies attached to the biological fixing piece. The rotating speed of the biological fixing piece around the rotating shaft is increased, and redundant bacterial colonies and dirt attached to the biological fixing piece are removed under the action of centrifugal force. The invention also discloses a process for treating sewage.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to a biological reaction device for water treatment and a process for treating sewage. Background Art

[0002] The biofilm method is a biological treatment technology that purifies water through the biofilm formed by microorganisms attached and grown on the surface of a solid carrier. The biological rotary disc water treatment device, as a biofilm method sewage treatment device, has been widely used in the treatment of petrochemical wastewater, domestic sewage, garbage leachate, etc.

[0003] The biological turntable water treatment device is generally composed of a reaction tank and a biological turntable device mounted above the reaction tank. The biological turntable device includes a rotating shaft and a biological turntable arranged on the outer periphery of the rotating shaft and rotating with the biological turntable. The disc-shaped biofilm sheet of the biological turntable is partially immersed in the sewage in the reaction tank. The microorganisms attached to the disc-shaped biofilm sheet are used to form a biofilm on the disc-shaped biofilm sheet to degrade the organic matter in the sewage and achieve the purpose of purification. However, after the biological turntable device has been working for a long time, the biofilm hanging on the turntable biofilm sheet will continue to attach and thicken, resulting in an increase in the operating load of the device, the middle part of the rotating shaft is subjected to the largest bending moment, and the inner disc welding part in the middle of the rotating shaft is prone to breakage.

[0004] The Chinese invention patent with application publication number CN118479641A discloses a dual-effect biological turntable device and a process for treating sewage, which includes a rotating shaft, an inner disc fixed to the outer periphery of the middle part of the rotating shaft, and outer discs fixed to the outer peripheries of both ends of the rotating shaft. There are several biofilm sheets between the inner disc and the outer disc, and a grid net is arranged between two adjacent inner discs to enclose a cylindrical rotating cage, in which the biofilm filler can be placed. The device arranges a grid net on the outer edge of the original inner disc of the rotating shaft to form a rotating cage, which can conveniently transform the biological turntable device and is suitable for sewage treatment plants that need to be transformed in situ. At the same time, the grid net connected between the middle part of the rotating shaft and the inner disc can also play a reinforcing role to avoid fracture at the weld of the inner disc in the middle part of the rotating shaft.

[0005] However, the technical solution disclosed in the Chinese invention patent with application publication number CN118479641A is not to directly control the bacterial weight of the disc-shaped biofilm sheet through equipment to avoid breakage at the inner disc weld in the middle of the rotating shaft, and in this solution, the aerobic bacteria are not supplied with enough oxygen, and the contact between the bacterial flora and 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 reaction device for water treatment that can simultaneously utilize aerobic bacteria, anoxic bacteria and anaerobic bacteria for sewage treatment, and excessive aerobic bacteria, anoxic bacteria and anaerobic bacteria in the device can be directly removed by the device.

[0007] In order to solve the above technical problems, the technical solution of the present invention is: A biological reaction device for water treatment comprises a container, a rotating shaft with a plumb bob arranged in the container, a driving member for driving the rotating shaft to rotate, and a biological fixing member fixedly connected to the outer periphery of the rotating shaft. The biological fixing parts include an aerobic bacteria fixing part, an anoxic bacteria fixing part and an anaerobic bacteria fixing part which are sequentially distributed from top to bottom, and the container is provided with a ventilating part above the uppermost aerobic bacteria fixing part.

[0008] Preferably, in order to fix aerobic bacteria, anoxic bacteria and anaerobic bacteria, the biological fixing element is a biological fixing disk, the aerobic bacteria fixing element is an aerobic bacteria fixing disk, the anoxic bacteria fixing element is an anoxic bacteria fixing disk, and the anaerobic bacteria fixing element is an anaerobic bacteria fixing disk.

[0009] Preferably, in order to allow aerobic bacteria on the aerobic bacteria fixing piece to contact more air, the upper section of the rotating shaft is a hollow rotating shaft, an air inlet hole is provided at the upper end of the rotating shaft, an air outlet hole 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 disk, and the air outlet hole is located above the anaerobic bacteria fixing disk.

[0010] Preferably, in order to allow aerobic bacteria on the aerobic bacteria fixing piece to contact more air, the aerobic bacteria fixing plate at the bottom is provided with an upward guide plate, and the aerobic bacteria fixing plate in the middle and upper part is provided with a downward guide plate, a horizontal guide plate and an upward guide plate in sequence from the center to the outside.

[0011] Preferably, in order to place aerobic bacteria, anoxic bacteria and / or anaerobic bacteria in environments with different oxygen contents, the rotating shaft includes an inner shaft and an outer shaft, the inner shaft is drive-connected to a motor, the inner shaft is fixedly connected to an aerobic bacteria fixing member, the outer shaft is fixedly connected to an anoxic bacteria fixing member and an anaerobic bacteria fixing member, the outer shaft is sleeved on the outer periphery of the inner shaft and can realize relative movement around the axis relative to the inner shaft, the outer shaft is connected to the inner shaft through a differential system, and the differential system is used to control the rotation of the inner shaft and the outer shaft around the axis.

[0012] Preferably, in order for aerobic bacteria of the aerobic bacteria fixing member to obtain more oxygen, the angular velocity of the inner shaft rotation is greater than the angular velocity of the outer shaft rotation.

[0013] 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 and coaxial with the first gear, and an outer shaft gear fixedly connected to the bottom of the outer shaft, and the outer shaft gear meshing with the second gear.

[0014] 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 rotationally connected via a bearing, and waterproof washers are provided at both ends of the bearing.

[0015] A second object of the present invention is to provide a process for treating sewage, comprising the following steps: S1: inject sewage into the container, and the sewage water level is at least higher than the uppermost aerobic bacteria fixing plate; S2: Turn on the driving member, the driving member drives the biological fixing disk to rotate, and the driving member is adjusted to make the liquid surface splash; S3: The sewage in the container is tested every 1 hour. When the sewage reaches the standard for input into the next treatment stage, the water is discharged and sewage is continued to be injected into the container for treatment.

[0016] Preferably, in order to allow the aerobic bacteria on the aerobic bacteria fixing disk to obtain more oxygen, the steps S2 and S3 further include: Insert the air hose into the shaft from the air inlet at the upper end of the shaft until the air outlet of the air hose is inserted into the position corresponding to the lowest air outlet hole inside the shaft, and then supply air. At this time, the air in the air hose escapes from the air outlet hole, forming bubbles, which tend to float upwards. The bubbles escaping from the bottom air outlet holes are blocked by the upper aerobic bacteria fixed disk, and under the centrifugal force brought by contact with the upper aerobic bacteria fixed disk, the floating speed is slowed down and moves to the edge of the bottom aerobic bacteria fixed disk. The upward guide plate of the bottom aerobic bacteria fixed disk prevents the bubbles from moving to the anoxic bacteria fixed disk. The bubbles escaping from the air outlet holes in the upper middle part are not only blocked by the aerobic bacteria fixing disk above and acted upon by the centrifugal force caused by contact with the aerobic bacteria fixing disk above, but are also affected by the downward guide plate, horizontal guide plate and upward guide plate arranged in sequence from the center to the outside of the aerobic bacteria fixing disk in the upper middle part. The bubbles first sink downward, then diffuse horizontally outward, and finally turn upward to the outside.

[0017] The advantages and beneficial effects of the present invention are: The biological fixture is in contact with the sewage. Driven by the driving element, the biological fixture rotates and stirs the sewage. The closer the water is to the water surface, the higher the oxygen content is, and the farther the water is from the water surface, the lower the oxygen content is. The conditions in the container are aerobic, anoxic and anaerobic from top to bottom. The sewage can be biologically treated by the bacteria colonies attached to the biological fixture.

[0018] By increasing the rotation speed of the biological fixing part around the rotating shaft, the excess bacterial colonies and dirt attached to the biological fixing part are removed under the action of centrifugal force.

[0019] The device has reasonable structure, low failure rate and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of Example 1 of a biological reaction device for water treatment of the present invention; Figure 2 yes Figure 1 Explosion diagram of Figure 3 is a schematic structural diagram of another perspective of Embodiment 1 of the biological reaction device for water treatment of the present invention; Figure 4 is another structural schematic diagram of Embodiment 1 of the biological reaction device for water treatment of the present invention; Figure 5 yes Figure 4 Explosion diagram of Figure 6 yes Figure 4 A magnified view of part A; Figure 7 yes Figure 5 A magnified view of part B; Figure 8 It is a schematic diagram of the structure of an anoxic bacteria fixed disk, an anaerobic bacteria fixed disk, a part of the rotating shaft and an aerobic bacteria fixed disk provided with a guide plate of Example 1 of the biological reaction device for water treatment of the present invention; Fig. 9 yes Figure 8 Enlarged view of part C; Fig.10 It is a schematic structural diagram of a transmission system, a part of the inner shaft and a part of the outer shaft of Example 2 of a biological reaction device for water treatment of the present invention; Fig.11 yes Fig.10 Explosion diagram of Fig.12 It is a bottom view of the transmission system, part of the inner shaft and part of the outer shaft of the embodiment 2 of the biological reaction device for water treatment of the present invention; Fig.13 yes Fig.10 An enlarged schematic diagram of the D portion; Fig.14 It is a schematic diagram of the connection of the inner and outer shaft parts of the embodiment 2 of the biological reaction device for water treatment of the present invention; Fig.15 yes Fig.14 Explosion diagram of Fig.16 yes Fig.14 Another explosion diagram.

[0021] In the figure: 1. container; 101. ventilation part; 102. drain outlet; 103. shaft fixing part; 1031. limit part; 1032. air inlet; 2. driving part; 3. shaft; 301. inner shaft; 3011. air outlet hole; 3012. inner shaft gear; 302. outer shaft; 3021. outer shaft gear; 401. aerobic bacteria fixing part; 4011. downward guide plate; 4012. horizontal guide plate; 4013. upward guide plate; 402. anoxic bacteria fixing part; 403. anaerobic bacteria fixing part; 501. first gear; 502. second gear; 6. waterproof gasket; 7. bearing. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0023] Example 1

[0024] like Figure 1-Figure 9 As shown, a biological reaction device for water treatment according to Example 1 of the present invention comprises a container 1, a rotating shaft 3 with a plumb bob arranged in the container 1, a driving member 2 for driving the rotating shaft 3 to rotate, and a biological fixing member fixedly connected to the outer periphery of the rotating shaft 3, wherein the biological fixing member comprises an aerobic bacteria fixing member 401, an anoxic bacteria fixing member 402 and an anaerobic bacteria fixing member 403 distributed in sequence from top to bottom, and the container 1 has a ventilation portion 101 above the uppermost aerobic bacteria fixing member 401.

[0025] The biological fixing member is a biological fixing disk, the aerobic bacteria fixing member 401 is an aerobic bacteria fixing disk, the anoxic bacteria fixing member 402 is an anoxic bacteria fixing disk, and the anaerobic bacteria fixing member 403 is an anaerobic bacteria fixing disk.

[0026] In this embodiment, the container 1 is a tank-shaped reaction container, and the interior of the container 1 near the top is provided with a rotating shaft fixing part 103, the rotating shaft fixing part 103 is fixedly connected to the inner wall of the container 1, the rotating shaft fixing part 103 has a limiting part 1031, and there is also a corresponding rotating shaft fixing part at the bottom of the container 1; the rotating shaft 3 is plumbly arranged in the container 1 and cooperates with the limiting part 1031 of the container 1 and the rotating shaft 3 fixing part, and the rotating shaft 3, the limiting part 1031 and the rotating shaft fixing part are all on the same plumb line, that is, the rotating shaft 3 is plumbly arranged in the container 1; the driving member 2 is arranged at the bottom of the container 1, and is used to drive the rotating shaft 3 to rotate; in order to reduce the rotation resistance of the rotating shaft 3, the rotating shaft 3 is connected to the limiting part 1031 by a bearing; the biological fixing disk is detachably connected to the outer periphery of the rotating shaft 3.

[0027] Furthermore, the container 1 has an open top. Specifically, at this time, the air flow in contact with the sewage surface in the container 1 becomes larger, that is, the total amount of air in contact with the sewage surface in the container 1 at the same time becomes larger, the oxygen content dissolved in the upper sewage increases, and the aerobic bacteria attached to the aerobic bacteria fixing disk are in an aerobic environment, with high working efficiency.

[0028] Furthermore, the bottom of the container 1 has a drain port 102. Specifically, the sewage contains pollutants with a higher density than water, and these pollutants will settle to the bottom of the container 1. The arrangement of the drain port 102 at the bottom of the container 1 is conducive to conveniently collecting these pollutants.

[0029] When the biological reaction device for water treatment of this embodiment is in operation, sewage is first injected into the container 1, and the sewage water level is at least higher than the aerobic bacteria fixed disk at the top. Then the driving member 2 is turned on, and the driving member 2 drives the biological fixed disk to rotate. The driving member 2 is adjusted to make the liquid surface splash. At this time, aerobic, anoxic and anaerobic conditions are formed in the container 1 from top to bottom. Then the sewage in the container is tested every 1 hour. After the sewage reaches the standard for inputting the next treatment stage, the water is discharged and sewage is continuously injected into the container 1 for treatment. In addition, when there are too many colonies and / or dirt attached to the biological fixed disk, the driving member 2 is adjusted, and the rotation speed of the biological fixed disk around the rotating shaft 3 becomes larger, and the excessive colonies and / or dirt attached to the biological fixed disk are removed under the action of centrifugal force.

[0030] Furthermore, the upper section of the rotating shaft 3 is a hollow rotating shaft, an air inlet is provided at the upper end of the rotating shaft 3, an air outlet hole 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 disk, and the air outlet hole 3011 is located above the anoxic bacteria fixing disk.

[0031] Specifically, the oxygen content of sewage is generally low. When the oxygen content of sewage is too low, the oxygen content increased by stirring the water body alone cannot meet the oxygen demand of aerobic bacteria on the aerobic bacteria fixing disk; the upper rotating shaft 3 is a hollow rotating shaft, and the outer wall of the upper rotating shaft 3 is provided with an air outlet hole 3011; at this time, air is input through the air inlet hole at the end of the upper rotating shaft 3, and the oxygen content of the upper sewage increases, which can meet the oxygen demand of aerobic bacteria on the aerobic bacteria fixing disk. In order to facilitate the input of air through the end of the upper rotating shaft 3, the rotating shaft fixing part 103 has an air inlet 1032, and the air supply hose is inserted from the air inlet 1032, and extends into the rotating shaft 3 from the air inlet hole at the upper end of the rotating shaft 3, until the air supply port of the air supply hose extends into the position corresponding to the lowest air outlet hole 3011 inside the rotating shaft 3, and then the air is supplied, and at this time, the air in the air supply hose escapes from the air outlet hole 3011 to form bubbles.

[0032] Furthermore, the aerobic bacteria fixing disk at the bottom is provided with an upward guide plate 4013, and the aerobic bacteria fixing disk at the middle and upper part 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.

[0033] Specifically, the air in the air delivery hose escapes from the air outlet hole 3011 to form bubbles, which tend to float upward; the guide plate has the function of guiding the water flow; The bubbles escaping from the bottom air outlet holes 3011 are blocked by the upper aerobic bacteria fixed disk, and under the centrifugal force brought by contact with the upper aerobic bacteria fixed disk, the floating speed slows down and moves to the edge of the bottom aerobic bacteria fixed disk. The contact time between the bubbles and the bottom aerobic bacteria fixed disk becomes longer, and the bottom aerobic bacteria fixed disk obtains more oxygen, thereby improving the sewage treatment effect. The upward guide plate 4013 of the bottom aerobic bacteria fixed disk prevents the bubbles from moving to the anoxic bacteria fixed disk. In addition to being blocked by the upper aerobic bacteria fixing disk and the centrifugal force caused by contact with the upper aerobic bacteria fixing disk, the bubbles escaping from the middle and upper air outlet holes 3011 are also affected by the downward guide plate 4011, the horizontal guide plate 4012 and the upward guide plate 4013 arranged in sequence from the center to the outside of the middle and upper aerobic bacteria fixing disk, and have a tendency to first sink downward, then spread horizontally outward, and finally turn up to the outside, thereby prolonging the contact time between air and aerobic bacteria on the aerobic bacteria fixing disk and increasing the contact area and contact probability between air and aerobic bacteria on the aerobic bacteria fixing disk.

[0034] In addition, the aerobic bacteria fixing plate at the bottom is provided with an upward guide plate 4013 , which is also helpful to balance the up and down floating pressure of the rotating shaft 3 .

[0035] Example 2

[0036] like Figure 10-Figure 16 As shown, the water treatment biological reaction device of Example 2 of the present invention is based on Example 1, and the difference is that: The rotating shaft 3 includes an inner shaft 301 and an outer shaft 302. The inner shaft 301 is connected to the motor drive. The inner shaft 301 is fixedly connected to the aerobic bacteria fixing part 401. The outer shaft 302 is fixedly connected to the anoxic bacteria fixing part 401 and the anaerobic bacteria fixing part 403. The outer shaft 302 is sleeved on the outer periphery of the inner shaft 301 and can realize relative movement around the axis relative to the inner shaft 302. The outer shaft 302 is connected to the inner shaft 301 through a differential system, and the differential system is used to control the inner shaft 301 and the outer shaft to rotate around the axis.

[0037] The angular velocity of the inner shaft 301 is greater than the angular velocity of the outer shaft 302 .

[0038] The differential system includes an inner shaft gear 3012 fixedly connected to the bottom of the inner shaft 301, a first gear 501 meshingly connected to the inner shaft gear 3012, a second gear 502 fixedly connected to and coaxial with the first gear 501, and an outer shaft gear 3021 fixedly connected to the bottom of the outer shaft 302, and the outer shaft gear 3021 meshingly connected to the second gear 502. Further, the outer diameter of the outer shaft gear 3021 is greater than the outer diameter of the inner shaft gear 3012, the outer diameter of the inner shaft gear 3012 is greater than the outer diameter of the first gear 501, and the outer diameter of the first gear 501 is greater than the outer diameter of the second gear 502.

[0039] Specifically, the driving member 2 includes a motor and a reducer, and the inner shaft 301 is connected to the motor through the reducer. At this time, the inner shaft gear 3012 fixedly connected to the inner shaft 301 can be regarded as a driving wheel, and 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; and the outer diameter of the outer shaft gear 3021 is greater than the outer diameter of the inner shaft gear 3012, the outer diameter of the inner shaft gear 3012 is greater than the outer diameter of the first gear 501, and the outer diameter of the first gear 501 is greater than the outer diameter of the second gear 502, that is, at this time, the angular velocity of the inner shaft gear 3012 is greater than the angular velocity of the outer shaft gear 3021, then The angular velocity of the inner shaft 301 is greater than the angular velocity of the outer shaft 302; corresponding to the aerobic bacteria fixed disk connected to the inner shaft 301, and the anoxic bacteria fixed disk and the anaerobic bacteria fixed disk connected to the outer shaft 302, the angular velocity of the aerobic bacteria fixed disk rotating around the rotating shaft 3 is greater than the angular velocity of the anoxic bacteria fixed disk and the anaerobic bacteria fixed disk rotating around the rotating shaft 3; and the high-speed rotating aerobic bacteria fixed disk can stir up more splashes on the sewage surface, which is conducive to more contact with the air, that is, obtaining more oxygen; the anoxic bacteria fixed disk and the anaerobic bacteria fixed disk located in the lower section of the container rotate around the rotating shaft 3 when treating sewage only to have a more complete contact with the sewage, and their lower angular velocity around the rotating shaft 3 can reduce the overall power consumption of the motor.

[0040] Furthermore, the inner shaft 301 and the outer shaft 302 are rotatably connected via a bearing 7 , and waterproof washers 6 are provided at both ends of the bearing 7 .

[0041] Specifically, after the inner shaft 301 and the outer shaft 302 are connected by the bearing 7, the friction force between the two 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, the inner shaft 301 and the outer shaft 302 work in sewage for a long time, and the bearing 7 is easy to be blocked or corroded by sewage. Waterproof gaskets 6 are provided at both ends of the bearing 7 to facilitate the bearing 7 to work in sewage for a long time.

[0042] The present invention also provides a process for treating sewage using the above-mentioned device, the process comprising: S1: inject sewage into container 1, and the sewage water level is at least higher than the uppermost aerobic bacteria fixed disk; S2: Turn on the driving member 2, the driving member 2 drives the biological fixing disk to rotate, and the driving member 2 is adjusted to make the liquid surface splash; S3: The sewage in the container is tested every 1 hour. When the sewage reaches the standard for input into the next treatment stage, the water is discharged and sewage is continuously injected into container 1 for treatment.

[0043] Furthermore, the steps S2 and S3 further include: Insert the air hose from the air inlet 1032 and extend it into the rotating shaft 3 from the air inlet hole at the upper end of the rotating shaft 3 until the air outlet of the air hose extends into the position corresponding to the lowermost air outlet hole 3011 inside the rotating shaft 3, and then supply air. At this time, the air in the air hose escapes from the air outlet hole 3011 to form bubbles, which tend to float upwards. The bubbles escaping from the bottom air outlet holes 3011 are blocked by the upper aerobic bacteria fixed disk, and under the centrifugal force brought by contact with the upper aerobic bacteria fixed disk, the floating speed slows down and moves to the edge of the bottom aerobic bacteria fixed disk. The contact time between the bubbles and the bottom aerobic bacteria fixed disk becomes longer, and the bottom aerobic bacteria fixed disk obtains more oxygen, thereby improving the sewage treatment effect. The upward guide plate 4013 of the bottom aerobic bacteria fixed disk prevents the bubbles from moving to the anoxic bacteria fixed disk. In addition to being blocked by the upper aerobic bacteria fixing disk and the centrifugal force caused by contact with the upper aerobic bacteria fixing disk, the bubbles escaping from the middle and upper air outlet holes 3011 are also affected by the downward guide plate 4011, the horizontal guide plate 4012 and the upward guide plate 4013 arranged in sequence from the center to the outside of the middle and upper aerobic bacteria fixing disk, and have a tendency to first sink downward, then spread horizontally outward, and finally turn up to the outside, thereby prolonging the contact time between air and aerobic bacteria on the aerobic bacteria fixing disk and increasing the contact area and contact probability between air and aerobic bacteria on the aerobic bacteria fixing disk.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A biological reaction device for water treatment, comprising a container (1), a rotating shaft (3) with a plumb bob arranged in the container (1), a driving member (2) for driving the rotating shaft (3) to rotate, and a biological fixing member fixedly connected to the outer periphery of the rotating shaft (3), characterized in that: The biological fixing element comprises an aerobic bacteria fixing element (401), an anoxic bacteria fixing element (402) and an anaerobic bacteria fixing element (403) which are sequentially distributed from top to bottom, and the container (1) has a ventilation portion (101) above the aerobic bacteria fixing element (401) at the top.

2. The water treatment biological reaction device according to claim 1, characterized in that: The biological fixing element is a biological fixing disk, the aerobic bacteria fixing element (401) is an aerobic bacteria fixing disk, the anoxic bacteria fixing element (402) is an anoxic bacteria fixing disk, and the anaerobic bacteria fixing element (403) is an anaerobic bacteria fixing disk.

3. The water treatment biological reaction device according to claim 2, characterized in that: The upper section of the rotating shaft (3) is a hollow rotating shaft, an air inlet hole is arranged at the end of the upper section of the rotating shaft (3), an air outlet hole (3011) is arranged 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 disk, and the air outlet hole (3011) is located above the anoxic bacteria fixing disk.

4. The water treatment biological reaction device according to claim 3, characterized in that: The aerobic bacteria fixing disk at the bottom is provided with an upward guide plate (4013), and the aerobic bacteria fixing disk at the middle and upper part 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.

5. The water treatment biological reactor according to claim 1, characterized in that: The rotating shaft (3) comprises an inner shaft (301) and an outer shaft (302); the inner shaft (301) is connected to a motor drive; the inner shaft (301) is fixedly connected to the aerobic bacteria fixing part (401); the outer shaft (302) is fixedly connected to the anoxic bacteria fixing part (401) and the anaerobic bacteria fixing part (403); the outer shaft (302) is sleeved on the outer periphery of the inner shaft (301) and can realize relative movement around an axis relative to the inner shaft; the outer shaft (302) is connected to the inner shaft (301) via a differential system; the differential system is used to control the inner shaft (301) and the outer shaft (302) to rotate around an axis.

6. The water treatment bioreactor according to claim 5, characterized in that: The angular velocity of rotation of the inner shaft (301) is greater than the angular velocity of rotation of the outer shaft (302).

7. The water treatment bioreactor according to claim 6, characterized in that: The differential system comprises an inner shaft gear (3012) fixedly connected to the bottom of the inner shaft (301), a first gear (501) meshingly connected to the inner shaft gear (3012), a second gear (502) fixedly connected to and coaxial with the first gear (501), and an outer shaft gear (3021) fixedly connected to the bottom of the outer shaft (302), the outer shaft gear (3021) meshingly connected to the second gear (502).

8. The water treatment bioreactor according to claim 6, characterized in that: The inner shaft (301) and the outer shaft (302) are rotatably connected via a bearing (7), and waterproof washers (6) are provided at both ends of the bearing (7).

9. A process for treating sewage using the biological reactor for water treatment according to claim 4, characterized in that: The following steps are involved: S1: injecting sewage into the container (1) until the sewage water level is at least higher than the uppermost aerobic bacteria fixed disk; S2: turning on the driving member (2), the driving member (2) drives the biological fixing disk to rotate, and regulating the driving member (2) to cause the liquid surface to splash; S3: The sewage in the container is tested every hour. When the sewage reaches the standard for input into the next treatment stage, the water is discharged and sewage is continuously injected into the container (1) for treatment.

10. The process for treating sewage according to claim 9, characterized in that: The steps S2 and S3 also include: The air delivery hose is inserted into the rotating shaft (3) from the air inlet hole at the upper end of the rotating shaft (3) until the air outlet of the air delivery hose is inserted into the position corresponding to the lowermost air outlet hole (3011) inside the rotating shaft (3), and then air is delivered. At this time, the air in the air delivery hose escapes from the air outlet hole (3011) to form bubbles, which tend to float upwards; The bubbles escaping from the bottom air outlet holes (3011) are blocked by the upper aerobic bacteria fixed disk and, under the centrifugal force brought by contact with the upper aerobic bacteria fixed disk, their upward floating speed is slowed down and they move toward the edge of the bottom aerobic bacteria fixed disk. The upward guide plate (4013) of the bottom aerobic bacteria fixed disk prevents the bubbles from moving toward the anoxic bacteria fixed disk. The bubbles escaping from the upper middle air outlet hole (3011) are not only blocked by the upper aerobic bacteria fixing disk and acted upon by the centrifugal force caused by contact with the upper aerobic bacteria fixing disk, but are also affected by the downward guide plate (4011), the horizontal guide plate (4012) and the upward guide plate (4013) arranged in sequence from the center to the outside of the upper middle aerobic bacteria fixing disk, so that the bubbles first sink downward, then diffuse outward horizontally, and finally turn upward to the outside.

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