Enhanced culture device for low-temperature nitrifying bacteria in sewage plant

Abstract

The utility model relates to the technical field of sewage treatment, and discloses a sewage plant low-temperature nitrifying bacteria enhanced culture device which comprises a reactor, a water storage and drainage unit, a sludge storage and discharge unit, a refrigeration unit, a ventilation assembly and an automatic control unit. A rotating shaft is connected to the output end of the motor, stirring blades are connected to the left side and the right side of the rotating shaft, and aeration discs are connected to the upper side and the lower side of the rotating shaft. According to the utility model, the device is simple, the cost and the occupied area of the device are saved, the low-temperature environment in the reactor is accurately controlled, the aeration is uniform, the problem that the dissolved oxygen in the system is difficult to reduce when exceeding the standard is solved, the synergistic effect of the whole flora is improved, the labor intensity and error of experimenters are reduced, and unattended automatic operation can be realized; and the sludge storage and discharge box can be quickly and conveniently opened to clean the interior, so that the smoothness of the pipeline is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially relates to a sewage plant low temperature nitrifying bacteria reinforced culture device. BACKGROUND

[0002] With the rapid development of social economy, the discharge of sewage is increasing year by year, and the composition of pollutants in sewage is more and more complex and diverse, the discharge standard of sewage treatment is continuously improved, and the pressure of sewage treatment is continuously increased. The biochemical pool of sewage plant degrades organic matter and soluble pollutants in sewage through activated sludge microorganism, which is an important link of sewage treatment. The sewage plant usually adjusts the water distribution, controls the dissolved oxygen concentration of the biochemical pool, controls the sludge age of the biochemical pool, adjusts the pH of the biochemical pool and other ways to adjust the process, provides a good working environment for the functional bacteria group in the activated sludge, saves energy and reduces consumption, and improves the efficiency of pollutant treatment.

[0003] The nitrifying bacteria group in the activated sludge mainly plays a role in denitrification, and is sensitive to environmental temperature and influent pollutants. The suitable growth temperature is 5-35 degrees. The nitrification rate decreases significantly below 15 degrees, and the nitrification rate is only 25% of that at 30 degrees when the temperature is lower than 10 degrees. In the north region, the temperature difference between winter and summer is large, especially in the cold winter, the denitrification efficiency is obviously reduced, the nitrifying bacteria group has weak resistance to pollution impact, and a large amount of energy and operation cost is needed to ensure that the denitrification treatment effect meets the standard. It is an important research direction to select high-efficiency nitrifying bacteria species with high activity under low temperature conditions, study the reinforced culture of low-temperature nitrifying bacteria group under simulated sewage plant winter actual working condition, and make it applicable under low temperature conditions.

[0004] The experimental device for conventional culture of low-temperature nitrifying bacteria group has the problems of low-temperature control, dissolved oxygen control, high artificial labor intensity, and cannot meet the simulated actual working condition, the experimental function of the device is single, the cost of the device is high, and the cultured nitrifying bacteria is difficult to adapt to the actual production application demand. Therefore, a sewage plant low-temperature nitrifying bacteria reinforced culture device is provided to solve the above problems. Utility model content

[0005] In order to make up for the above shortcomings, the utility model provides a sewage plant low-temperature nitrifying bacteria reinforced culture device, which aims at improving the problems of conventional experimental device in the prior art, such as low-temperature control, dissolved oxygen control, high artificial labor intensity, and not enough to meet the simulated actual working condition.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a low-temperature nitrifying bacteria enhanced cultivation device for wastewater treatment plants, comprising a reactor, a water storage and drainage unit, a sludge storage and discharge unit, a refrigeration unit, an aeration assembly, and an automatic control unit. The reactor is connected inside a support frame, and a motor is connected to the upper part of the reactor. The output end of the motor is connected to a rotating shaft, and stirring blades are connected to both sides of the rotating shaft. A connecting pipe frame is connected to the upper side of the rotating shaft, and aeration discs are connected to both sides of the bottom of the connecting pipe frame. The aeration discs are connected to the lower part of the rotating shaft. On the side, the external of the connecting pipe rack is connected to evenly distributed aeration plates. The aeration discs and aeration plates are both provided with evenly distributed aeration holes. An air ventilation component is slidably connected to one side of the internal of the connecting pipe rack. Valves are fixedly connected to both sides of the internal of the reactor. The refrigeration unit includes a second water supply hose, which is engaged in the lower left valve switch. One end of the second water supply hose is connected to a chiller. A first water supply hose is connected to the upper left side of the chiller and is engaged in the upper right valve switch.

[0007] As a further description of the above technical solution:

[0008] The sludge storage and discharge unit includes a sludge discharge valve, which is fixedly connected to the bottom of the reactor. A sludge conveying hose is internally engaged with the bottom end of the sludge discharge valve. A sludge pump is internally engaged with one end of the sludge conveying hose. A sludge discharge hose is internally engaged with the output end of the sludge pump. A sludge storage and discharge tank is internally engaged with one end of the sludge discharge hose. A tank cover is attached to the upper part of the sludge storage and discharge tank. Mounting blocks are fixedly connected to the four bottom corners of the tank cover. A through groove is opened at each of the four upper corners of the inside of the sludge storage and discharge tank. A telescopic component is fixedly connected to one side of the inner wall of the through groove. A trapezoidal block is fixedly connected to one end of the telescopic component. A locking block is fixedly connected to one side of the trapezoidal block. The locking block is slidably connected inside the mounting block. A return spring is fixedly connected to one side of the trapezoidal block. One end of the return spring is fixedly connected to the other side of the inner wall of the through groove. A spring is sleeved on the outside of the telescopic component.

[0009] As a further description of the above technical solution:

[0010] The ventilation assembly includes a nitrogen supply hose and a gas supply hose. One end of each hose is snapped into the interior of the upper connecting pipe rack. The other end of the nitrogen supply hose is connected to a nitrogen cylinder. One end of the gas supply hose is connected to a gas pump. A gas flow meter is connected to the lower outer side of the gas supply hose.

[0011] As a further description of the above technical solution:

[0012] One end of the spring is fixedly connected to one side of the inner wall of the through groove, and the other end of the spring is fixedly connected to one side of the trapezoidal block.

[0013] As a further description of the above technical solutions:

[0014] The left lower side and the right upper side valve switches are connected to the jacket of the reactor, and the rest of the valve switches are fixedly connected to the inner barrel of the reactor.

[0015] As a further description of the above technical solutions:

[0016] The water storage and discharge unit comprises a water storage and discharge tank, a water pump is connected to the upper portion of the water storage and discharge tank, a first water conveying hose is connected to the output end of the water pump, one end of the first water conveying hose is clamped and connected in the interior of the left uppermost valve switch, a water taking hose is connected to the upper portion of the water storage and discharge tank, and one end of the water taking hose is clamped and connected in the interior of the left upper second valve switch.

[0017] As a further description of the above technical solutions:

[0018] The exterior of the first water conveying hose, the water taking hose, the first water conveying hose, the second water conveying hose and the mud conveying hose are fixedly connected with the timing switch.

[0019] As a further description of the above technical solutions:

[0020] The automatic control unit comprises a controller, the controller is fixedly connected to the front side of the outer wall of the reactor, and the controller is electrically connected with the timing switch.

[0021] The utility model has the advantages of the following:

[0022] In the utility model, the water chiller is started by the timing switch to control the temperature of the reactor, when the controller receives the information that the dissolved oxygen of the reaction liquid exceeds the control value, the air pump and the nitrogen cylinder input nitrogen and air into the reactor to aerate the reaction liquid, the motor is started to rotate the rotating shaft to rotate the stirring blade to stir the reaction liquid to reduce the dissolved oxygen, the device is simple, the device cost and the land area are saved, the low-temperature environment in the reactor is accurately controlled, the aeration is uniform, the problem that the system dissolved oxygen is difficult to reduce when exceeding the standard is solved, the overall bacterial flora synergistic effect is improved, the labor intensity and the error of the experiment personnel are reduced, and the device can be unmanned and automatically operated.

[0023] In the utility model, the installation block is moved to extrude the clamping block by pulling the box cover, the trapezoidal block extrudes the telescopic piece and the spring one and pulls the reset spring, the clamping block moves out of the interior of the installation block, the installation block is smoothly moved out of the through slot, the box cover is separated from the mud storage and discharge tank to clean the interior, the mud storage and discharge tank can be quickly and conveniently opened to clean the interior, the pipeline is ensured to be unobstructed, and the equipment can normally operate. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a front view of a sewage plant low-temperature nitrifying bacteria reinforced culture device according to the present application;

[0025] Figure 2 is a rear view of a sewage plant low-temperature nitrifying bacteria reinforced culture device according to the present application;

[0026] Figure 3 is a reactor sectional view of a sewage plant low-temperature nitrifying bacteria reinforced culture device according to the present application;

[0027] Figure 4 is a storage and discharge mud tank cover mounting structure schematic view of a sewage plant low-temperature nitrifying bacteria reinforced culture device according to the present application.

[0028] Legend:

[0029] 1, support; 2, reactor; 3, controller; 4, motor; 5, rotating shaft; 6, stirring blade; 7, connecting pipe frame; 8, aeration disc; 9, aeration hole; 10, aeration plate; 11, valve switch; 12, storage and discharge water tank; 13, water pump; 14, timing switch; 15, first water delivery hose; 16, water taking hose; 17, water cooler; 18, water delivery hose one; 19, water delivery hose two; 20, mud discharge valve; 21, mud delivery hose; 22, mud pump; 23, mud discharge hose; 24, storage and discharge mud tank; 25, air pump; 26, gas flow meter; 27, gas delivery hose; 31, nitrogen cylinder; 32, nitrogen delivery hose; 33, tank cover; 34, mounting block; 35, through slot; 36, return spring; 37, trapezoidal block; 38, clamping block; 39, telescopic part; 40, spring one. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Reference Figure 1 , Figure 2 , Figure 3The utility model provides an embodiment: a kind of sewage plant low-temperature nitrifying bacteria reinforced culture device, including reactor 2, storage drainage unit, storage and discharge mud unit, refrigeration unit, aeration assembly, automatic control unit, reactor 2 is connected in the inside of support 1, the upper portion of reactor 2 is connected with motor 4, the output end of motor 4 is connected with shaft 5, the left and right sides of shaft 5 are all connected with stirring vane 6 the upside of shaft 5 is connected with connecting pipe frame 7, the bottom left and right sides of connecting pipe frame 7 are all connected with aeration disc 8, aeration disc 8 is connected in the downside of shaft 5, the outside of connecting pipe frame 7 is connected with the aeration plate 10 of uniform distribution, the inside of aeration disc 8 and aeration plate 10 is all set with the aeration hole 9 of uniform distribution, so that it expands to the reaction liquid and carries out uniform aeration, the inside one side of connecting pipe frame 7 is all slidably connected with aeration assembly, the inside both sides of reactor 2 are all fixedly connected with valve switch 11, refrigeration unit includes water hose two 19, water hose two 19 is clampedly connected in left lower valve switch 11, one end of water hose two 19 is connected with water cooler 17, the left upper side of water cooler 17 is connected with water hose one 18, water hose one 18 is clampedly connected in right upper valve switch 11, guaranteeing that the low-temperature environment in reactor 2 is accurately controlled;Aeration assembly includes nitrogen delivery hose 32 and gas delivery hose 27, one end of nitrogen delivery hose 32 and gas delivery hose 27 is clampedly connected in the inside of upper connecting pipe frame 7, the other end of nitrogen delivery hose 32 is connected with nitrogen cylinder 31, one end of gas delivery hose 27 is connected with air pump 25, the outside lower side of gas delivery hose 27 is connected with gas flowmeter 26, so that it can adjust the flow while air delivery.

[0032] By starting water pump 13, sewage is pumped into the inside of reactor 2, air pump 25 is started, air enters connecting pipe frame 7, then enters aeration plate 10 and aeration disc 8, nitrogen and air are input into reactor 2 through aeration hole 9, to expand the culture reaction liquid and carry out uniform aeration, because the top of reactor 2 has reserved through hole, so that it can insert dissolved oxygen probe, monitor internal dissolved oxygen, so as to adjust the amount of aeration, when the dissolved oxygen of reaction liquid exceeds the control value, timer switch 14 opens nitrogen cylinder 31 and starts motor 4, so that shaft 5 rotates and stirring vane 6 rotates to stir reaction liquid to reduce dissolved oxygen, and at the same time, aeration plate 10 rotates, the stirring area is expanded, which saves device cost and occupies area, guarantees that the low-temperature environment in reactor 2 is accurately controlled, aeration is uniform, solves the problem that it is difficult to reduce when system dissolved oxygen exceeds the standard, improves the overall synergistic effect of bacterial population, and reduces the labor intensity and error of experimental personnel, which can be unmanned automatic operation.

[0033] Refer to Figure 1 , Figure 2 , Figure 4The storage and discharge mud unit comprises a discharge mud valve 20 fixedly connected to the bottom of the reactor 2, a mud conveying hose 21 internally snap-connected to the bottom end of the discharge mud valve 20, a mud pump 22 internally snap-connected to one end of the mud conveying hose 21, a discharge mud hose 23 snap-connected to the output end of the mud pump 22, and a storage and discharge mud tank 24 internally snap-connected to one end of the discharge mud hose 23, so that the bacterial liquid or seed mud can be stored or conveyed. The upper portion of the storage and discharge mud tank 24 is attached with a tank cover 33, the bottom of the tank cover 33 is fixedly connected with mounting blocks 34 at four corners, the inside of the storage and discharge mud tank 24 is provided with through grooves 35 at four corners on the upper side, the inner wall of the through grooves 35 is fixedly connected with a telescopic piece 39 on one side, one end of the telescopic piece 39 is fixedly connected with a trapezoidal block 37, one side of the trapezoidal block 37 is fixedly connected with a clamping block 38, the clamping block 38 is slidingly connected inside the mounting block 34, one side of the trapezoidal block 37 is fixedly connected with a return spring 36, one end of the return spring 36 is fixedly connected to the other side of the inner wall of the through groove 35, and the telescopic piece 39 is externally sleeved with a spring 40, so that the tank cover 33 can be quickly installed and dismounted, one end of the spring 40 is fixedly connected to the inner wall of the through groove 35 on one side, and the other end of the spring 40 is fixedly connected to one side of the trapezoidal block 37.

[0034] By preventing the long-term accumulation of sludge inside the storage and discharge mud tank 24 to form a large sludge pile, the sludge adheres to the pipeline, and the inside needs to be cleaned regularly. The tank cover 33 is pulled to move the mounting block 34 to press the clamping block 38, the trapezoidal block 37 presses the telescopic piece 39 and the spring 40, and the return spring 36 is pulled, so that the clamping block 38 moves out of the inside of the mounting block 34, the mounting block 34 is smoothly moved out of the through groove 35, the tank cover 33 is separated from the storage and discharge mud tank 24, the inside is cleaned, the storage and discharge mud tank 24 can be quickly and conveniently opened for cleaning the inside, and the pipeline is ensured to be unobstructed. When the tank cover 33 needs to be reinstalled, the clamping block 38 is inserted into the mounting block 34 to install and fix the tank cover 33 when the mounting block 34 is inserted into the through groove 35 and is pressed by the clamping block 38 and the trapezoidal block 37, and the clamping block 38 is inserted into the mounting block 34 by the elastic force of the telescopic piece 39 and the spring 40.

[0035] Referring to Figure 1 , Figure 2, the lower left and upper right valve switch 11 is connected to the reactor 2 jacket, the rest of the valve switch 11 are fixedly connected to the reactor 2 barrel, so that the sewage into the reactor 2 and the supernatant is located where the position can be taken out; storage and drainage unit includes storage and drainage tank 12, the upper portion of the storage and drainage tank 12 is connected with water pump 13, the output end of the water pump 13 is connected with the first water hose 15, one end of the first water hose 15 is clamped and connected in the inside of the uppermost left valve switch 11, the upper portion of the storage and drainage tank 12 is connected with the water taking hose 16, one end of the water taking hose 16 is clamped and connected in the inside of the second upper left valve switch 11, so that the nutrient solution is input into the reactor 2 and taken out of the reactor 2; the outside of the first water hose 15, the water taking hose 16, the water hose one 18, the water hose two 19 and the mud hose 21 are fixedly connected with the timing switch 14; the automatic control unit includes the controller 3, the controller 3 is electrically connected with the dissolved oxygen measuring probe (not marked here) built in the reactor, the controller 3 is fixedly connected to the front side of the outer wall of the reactor 2, and the controller 3 is electrically connected with the timing switch 14.

[0036] The controller 3 is used for unified debugging time of all timing switches 14, so that the subsequent device runs through the timing switch 14 to control the operation of each pump and equipment, so as to realize the automatic operation of the automatic control device, the timing switch 14 starts the water cooler 17, the cold water is sent through the water hose one 18 and the water hose two 19, and the cold water is input into the reactor 2 from the left lower right upper mode, so as to control the temperature of the reactor 2; when the nutrient solution needs to be pumped into the reactor 2, the timing switch 14 automatically starts the water pump 13 to make the nutrient be injected into the reactor 2 through the first water hose 15, when the supernatant after reaction is discharged to the inside of the storage and drainage tank 12 by gravity, the bacteria liquid or seed sludge in the storage and drainage tank 24 is pumped into the reactor 2 according to the need, or the bottom sludge is pumped out of the reactor 2 through the bottom sludge valve, and the bottom sludge is sent into the inside of the storage and drainage tank 24 through the mud pump 22 and the mud discharge hose 23.

[0037] Working principle: when the device is needed, the water pump 13 is started, the nutrient solution is pumped into the inside of the reactor 2, the timing switch 14 starts the water cooler 17 to input cold water into the jacket of the reactor 2 to control the temperature of the reactor 2, and the air pump 25 is started at the same time, so that the air enters the connecting pipe frame 7, then enters the aeration plate 10 and the aeration disc 8, and then the nitrogen and air are input into the reactor 2 through the aeration hole 9 to aerate the reaction solution, when the dissolved oxygen of the reaction solution exceeds the control value, the controller 3 receives the information transmission, and the electromagnetic valve (not marked here) arranged on the nitrogen cylinder 31 and the motor 4 are started at the same time, so that the rotating shaft 5 rotates to make the stirring blade 6 rotate to stir the reaction solution to reduce the dissolved oxygen,

[0038] When the nutrient solution needs to be pumped into the reactor 2, the timing switch 14 starts the water pump 13 to inject the nutrient solution, and the supernatant after the reaction is discharged into the inside of the storage and discharge tank 12 by gravity, and the bacterial solution or seed sludge is pumped into the reactor 2 according to the needs, or the settled bottom sludge is pumped out through the bottom sludge valve of the reactor 2, which realizes simple device, saves device cost and land area, ensures precise control of the low-temperature environment in the reactor 2, uniform aeration, solves the problem of difficult reduction when the system exceeds the standard of dissolved oxygen, improves the overall synergistic effect of the bacterial population, reduces the labor intensity and error of the experimenters, and can be unmanned and automatically operated; in order to prevent the sludge in the inside of the storage and discharge tank 24 from being accumulated for a long time to form a large sludge pile and adhering to the pipeline, the inside needs to be cleaned regularly, the tank cover 33 is pulled to move the mounting block 34 to extrude the clamping block 38, the trapezoidal block 37 extrudes the telescopic part 39 and the spring one 40, the reset spring 36 is pulled to move the clamping block 38 out of the inside of the mounting block 34, the mounting block 34 is ensured to be smoothly moved out of the through slot 35, the tank cover 33 is separated from the storage and discharge tank 24 to clean the inside, which realizes that the storage and discharge tank 24 can be quickly and conveniently opened to clean the inside, ensures the smoothness of the pipeline, and enables the equipment to operate normally.

[0039] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A device for low-temperature nitrifying bacteria enrichment culture in sewage plant, comprising a reactor (2), a storage and discharge water unit, a storage and discharge sludge unit, a refrigeration unit, a ventilation assembly, an automatic control unit, characterized in that: The reactor (2) is connected inside the support (1), the upper part of the reactor (2) is connected with the motor (4), the output end of the motor (4) is connected with the rotating shaft (5), the left and right sides of the rotating shaft (5) are connected with the stirring blade (6), the upper side of the rotating shaft (5) is connected with the connecting pipe frame (7), the bottom left and right sides of the connecting pipe frame (7) are connected with the aeration disc (8), the aeration disc (8) is connected to the lower side of the rotating shaft (5), the outside of the connecting pipe frame (7) is connected with the evenly distributed aeration plate (10), the inside of the aeration disc (8) and the aeration plate (10) is provided with evenly distributed aeration holes (9), one side of the inside of the connecting pipe frame (7) is connected with the ventilation assembly, the inside of the reactor (2) is connected with the valve switch (11), the refrigeration unit comprises a water hose two (19), the water hose two (19) is connected in the left lower valve switch (11), one end of the water hose two (19) is connected with the water cooler (17), the left upper side of the water cooler (17) is connected with the water hose one (18), the water hose one (18) is connected in the right upper valve switch (11).

2. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 1, characterized in that: The storage and discharge unit comprises a discharge valve (20), the discharge valve (20) is fixedly connected to the bottom of the reactor (2), the bottom end of the discharge valve (20) is connected with the mud conveying hose (21), one end of the mud conveying hose (21) is connected with the mud pump (22), the output end of the mud pump (22) is connected with the mud discharge hose (23), one end of the mud discharge hose (23) is connected with the storage and discharge box (24), the upper part of the storage and discharge box (24) is connected with the box cover (33), the bottom of the box cover (33) is fixedly connected with the mounting block (34), the inside of the storage and discharge box (24) is provided with the through slot (35), one side of the inner wall of the through slot (35) is fixedly connected with the telescopic piece (39), one end of the telescopic piece (39) is fixedly connected with the trapezoidal block (37), one side of the trapezoidal block (37) is fixedly connected with the clamping block (38), the clamping block (38) is connected in the inside of the mounting block (34), one side of the trapezoidal block (37) is fixedly connected with the reset spring (36), one end of the reset spring (36) is fixedly connected to the other side of the inner wall of the through slot (35), the outside of the telescopic piece (39) is provided with the spring one (40).

3. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 1, characterized in that: The ventilation assembly comprises a nitrogen conveying hose (32) and a gas conveying hose (27), one end of the nitrogen conveying hose (32) and the gas conveying hose (27) is connected in the inside of the upper connecting pipe frame (7), the other end of the nitrogen conveying hose (32) is connected with the nitrogen cylinder (31), one end of the gas conveying hose (27) is connected with the gas pump (25), the lower side of the outside of the gas conveying hose (27) is connected with the gas flow meter (26).

4. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 2, characterized in that: One end of the spring one (40) is fixedly connected to the inner wall of the through groove (35), and the other end of the spring one (40) is fixedly connected to one side of the trapezoidal block (37).

5. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 1, characterized in that: The valve switches (11) on the left lower side and the right upper side are connected to the jacket of the reactor (2), and the remaining valve switches (11) are fixedly connected to the inner barrel of the reactor (2).

6. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 1, characterized in that: The water storage and discharge unit comprises a water storage and discharge tank (12), the upper portion of the water storage and discharge tank (12) is connected with a water pump (13), the output end of the water pump (13) is connected with a first water conveying hose (15), one end of the first water conveying hose (15) is clampingly connected in the inside of the left uppermost valve switch (11), the upper portion of the water storage and discharge tank (12) is connected with a water taking hose (16), and one end of the water taking hose (16) is clampingly connected in the inside of the left upper second valve switch (11).

7. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 6, characterized in that: The outside of the first water conveying hose (15), the water taking hose (16), the water conveying hose one (18), the water conveying hose two (19) and the mud conveying hose (21) are fixedly connected with timing switches (14).

8. The device for low-temperature nitrifying bacteria enrichment culture in sewage plant according to claim 1, characterized in that: The automatic control unit comprises a controller (3), the controller (3) is fixedly connected to the front side of the outer wall of the reactor (2), and the controller (3) is electrically connected with the timing switches (14).

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