A device and method for rapid cultivation of aerobic granular sludge

Abstract

The application discloses an aerobic granular sludge rapid cultivation device and method, and relates to the technical field of sewage treatment. The device comprises a reaction tank, which is internally provided with a water distribution system, a longitudinal partition plate, a drainage system, a single-side aeration system and a liftable sludge discharge system. The water distribution system is arranged at the top of the reaction tank, the longitudinal partition plate is arranged below the water distribution system, the drainage system is arranged between the water distribution system and the longitudinal partition plate, the single-side aeration system is arranged at one side of the bottom of the reaction tank, and the liftable sludge discharge system is connected to the longitudinal partition plate. The application realizes uniform water inflow in the reaction tank through the top water distribution device, provides hydraulic and aeration double shear force for granular sludge formation by means of the longitudinal partition plate and the single-side aeration system, discharges sludge with different sedimentation properties in the reactor at different stages of aerobic granular sludge formation out of the reaction tank by means of the liftable sludge discharge pipe, realizes flexible sludge screening, and realizes rapid cultivation and stable operation of the aerobic granular sludge.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, and in particular to a kind of aerobic granular sludge rapid culture device and method. BACKGROUND

[0002] The aerobic granular sludge technology is a new type of efficient sewage biological treatment technology different from traditional activated sludge, which forms granules by natural aggregation of flocculent growing activated sludge microorganisms under special process conditions, and forms aerobic zone, anoxic zone and anaerobic zone from the surface to the core of the granular sludge through the internal dissolved oxygen mass transfer resistance of the granular sludge, realizing the layered growth of different functional microorganisms in the sewage treatment process. This technology has the characteristics of good sludge settling performance, large biomass, small system footprint, and can realize simultaneous COD, nitrogen and phosphorus removal in a single reactor, etc. Compared with traditional activated sludge technology, it has significant advantages in terms of sewage treatment efficiency, process footprint, sewage treatment energy consumption and carbon emission during the treatment process. This technology originated in the Netherlands and has rapidly expanded in the international market, but there are few large-scale application cases in China. The long cultivation and formation period of aerobic granular sludge and the difficulty in maintaining stable granular morphology during long-term operation, as well as the easy disintegration of granular sludge leading to loss of treatment efficiency of the reactor, are the main problems that limit the successful application of this technology. SUMMARY

[0003] The present application proposes a new type of aerobic granular sludge rapid culture device and method to solve the problems of long cultivation period and easy disintegration during long-term operation of aerobic granular sludge in actual sewage treatment scenarios.

[0004] To solve the above problems, the technical scheme adopted by the present application is as follows:

[0005] In a first aspect, a kind of aerobic granular sludge rapid culture device is provided, including reaction tank, water distribution system, longitudinal partition, drainage system, single-side aeration system and liftable sludge discharge system are arranged in the reaction tank;The water distribution system is arranged at the top of the reaction tank, the longitudinal partition is arranged below the water distribution system, the drainage system is arranged between the water distribution system and the longitudinal partition, the single-side aeration system is arranged at one side of the bottom of the reaction tank, and the liftable sludge discharge system is connected to the longitudinal partition.

[0006] The water distribution system includes water distributor, water distribution pipe and water distribution head connected in sequence;The water distributor is arranged at the top of the reaction tank, and the water distribution head is arranged at the bottom of the reaction tank.

[0007] The longitudinal partition divides the reaction tank into first reaction zone and second reaction zone;The single-side aeration system is arranged in the second reaction zone.

[0008] Further, the lift type sludge discharge system comprises a sludge discharge main pipe and a plurality of sludge discharge branch pipes connected with the sludge discharge main pipe; the longitudinal partition plate is provided with a movable slot, the sludge discharge main pipe passes through the movable slot and can move up and down in the movable slot; the sludge discharge branch pipe is provided with a plurality of collecting holes.

[0009] Further, the water distributor comprises a water distributor body and a water distributor outer cylinder, the water distributor body is sleeved in the water distributor outer cylinder, the outer wall of the water distributor body is provided with a flow weir plate, the bottom of the water distributor body is connected with the bottom of the water distributor outer cylinder through a bottom plate, the bottom plate is provided with a plurality of orifices with equal arc distances; one end of the water distribution pipe is connected with the orifice, the other end of the water distribution pipe is connected with the water distribution head.

[0010] Further, the longitudinal partition plate is provided with flow guide inclined plates obliquely fixed on both sides of the longitudinal partition plate; the upper side of the longitudinal partition plate is provided with a first flow guide inclined plate, and the lower side of the longitudinal partition plate is provided with a second flow guide inclined plate; the first flow guide inclined plate and the second flow guide inclined plate are both at a certain angle with the longitudinal partition plate, the first flow guide inclined plate is inclined to the first reaction zone, and the second flow guide inclined plate is inclined to the second reaction zone.

[0011] Further, the water drainage system comprises a water outlet weir, a water outlet pipe and a strong drainage pipe, the water outlet weir is arranged between the water distributor and the longitudinal partition plate, the water outlet weir is connected with the water outlet pipe, and the strong drainage pipe is arranged between the water outlet weir and the longitudinal partition plate.

[0012] Further, the single-side aeration system comprises an aeration disc and a blower, the aeration disc is arranged at the bottom of the reaction tank, and the blower is connected with the aeration disc.

[0013] Further, the lift type sludge discharge system further comprises a lifting guide rail; the lifting guide rail is arranged on one side of the inner wall of the reaction tank, the lifting guide rail is connected with the sludge discharge main pipe, and the sludge discharge main pipe can reciprocate along the setting direction of the lifting guide rail; the strong drainage pipe is provided with a strong drainage valve.

[0014] Further, the aerobic granular sludge rapid cultivation device further comprises an adjusting tank and a sludge storage tank, the reaction tank is integrally built with the adjusting tank and the sludge storage tank; a water inlet pipe is arranged between the adjusting tank and the reaction tank, and a water inlet pump is arranged on the water inlet pipe; a sludge discharge pipe is arranged between the sludge storage tank and the reaction tank, and a bottom sludge discharge pump is arranged on the sludge discharge pipe; a sludge discharge hose is further arranged in the reaction tank, one end of the sludge discharge hose is connected with the sludge discharge main pipe, and the other end of the sludge discharge hose is connected with the sludge discharge pipe.

[0015] Further, an outer wall on one side of the reaction tank is provided with a sludge discharge port, and the sludge discharge hose and the sludge discharge pipe are connected through the sludge discharge port.

[0016] Further, the sludge storage tank and the reaction tank are further provided with a sludge backflow pipe, and a sludge backflow pump is arranged on the sludge backflow pipe.

[0017] In the second aspect, a method for realizing the device for rapid cultivation of aerobic granular sludge is provided, comprising the following steps:

[0018] a) water feeding / water discharging stage, the wastewater to be treated is fed into the reactor, the water feeding time is 60-80 min, the water feeding amount of the wastewater to be treated is 30-60% of the effective volume of the reactor; at the same time when the wastewater to be treated is fed into the reactor, the wastewater in the upper part of the reactor is discharged, that is, the wastewater reacted in the previous cycle is discharged at the same time when the wastewater is fed; after the water feeding is completed, the strong discharging stage is entered;

[0019] b) strong discharging stage, the water discharging system is started to control the liquid level, the water discharging time is 1-3 min, after the water discharging is completed, the water discharging system is closed, and the aeration stage is entered;

[0020] c) aeration stage, the one-side aeration system is started to perform aeration, the aeration time is 200-300 min, after the aeration is completed, the one-side aeration system is closed, and the sedimentation stage is entered;

[0021] d) sedimentation stage, the sedimentation time is 10-40 min.

[0022] Preferably, the water feeding time is 60 min.

[0023] Preferably, the water feeding amount of the wastewater to be treated is 60% of the effective volume of the reactor.

[0024] Preferably, the aeration time is 300 min.

[0025] Preferably, the sedimentation time is 10-30 min.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The top water distribution device is used to realize uniform water feeding in the reactor, the longitudinal partition plate in the reactor and the one-side aeration design of the partition plate provide hydraulic and aeration double shear force for the formation of granular sludge, the lifting sludge discharging pipe is used to discharge the sludge with different sedimentation properties in the reactor at different stages of the formation of aerobic granular sludge, flexible sludge screening is realized, and rapid cultivation and stable operation of aerobic granular sludge are realized. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0029] Figure 1It is a structural schematic view of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0030] Figure 2 It is a structural schematic view of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0031] Figure 3 It is a structural schematic view of a reaction tank of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0032] Figure 4 It is a structural schematic view of a reaction tank of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0033] Figure 5 It is a structural schematic view of a water distributor of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0034] Figure 6 It is a structural schematic view of a water distributor of a rapid cultivation device for aerobic granular sludge according to an embodiment of the present application.

[0035] Explanation of signs in the figure:

[0036] 1-adjustment tank; 2-reaction tank; 3-sludge storage tank; 4-water inlet pipe; 5-water inlet pump; 6-water distribution system; 7-longitudinal partition; 8-single-side aeration system; 9-water distributor; 10-water distribution pipe; 11-water distribution head; 12-water distributor body; 13-water distributor outer cylinder; 14-flow weir plate; 15-bottom plate; 16-orifice; 17-first reaction zone; 18-second reaction zone; 19-first flow guide inclined plate; 20-second flow guide inclined plate; 21-outlet weir; 22-outlet pipe; 23-strong drainage pipe; 24-aeration disc; 25-blower; 26-movable tank; 27-sludge discharge main pipe; 28-sludge discharge branch pipe; 29-lifting guide rail; 30-sludge discharge hose; 31-sludge discharge pipe; 32-bottom sludge discharge pump; 33-sludge return pipe; 34-sludge return pump. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. 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 protection scope of the present application.

[0038] In the description of the present application, it is necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the description of the present application, it is necessary to point out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0040] The terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0041] Please refer to Figures 1-6 The aerobic granular sludge rapid cultivation device shown in the figure comprises a regulating tank 1, a reaction tank 2 and a sludge storage tank 3. The regulating tank 1, the reaction tank 2 and the sludge storage tank 3 are connected in sequence. The reaction tank 2 is co-walled with the regulating tank 1 and the sludge storage tank 3, and is arranged intensively as a whole. The regulating tank 1 is used for storing untreated sewage, effectively coping with the fluctuation of water quality and quantity, and ensuring the relative stability of the water quality and quantity. An inlet pipe 4 is arranged between the regulating tank 1 and the reaction tank 2, and the inlet pipe 4 communicates the lower part of the regulating tank 1 and the top of the reaction tank 2. An inlet pump 5 is arranged on the inlet pipe 4, and the inlet pump 5 is used for pumping the sewage in the regulating tank 1 into the reaction tank 2.

[0042] The reaction tank 2 comprises a water distribution system 6, a longitudinal partition 7, a single-side aeration system 8, a drainage system and a lift sludge discharge system. The water inlet pipe 4 is connected with the water distribution system 6, which is arranged at the top of the reaction tank 2 and is used for uniformly feeding water into the reaction tank 2. The water distribution system 6 comprises a water distributor 9, a water distribution pipe 10 and a water distribution head 11. The water distributor 9 and the water distribution head 11 are connected through the water distribution pipe 10. The water distributor 9 is arranged at the top of the reaction tank 2 and comprises a water distributor body 12 and a water distributor outer cylinder 13. The water distributor body 12 is sleeved in the water distributor outer cylinder 13, and an overflow weir plate 14 is arranged on the outer wall of the water distributor body 12. The bottom of the water distributor body 12 is connected with the bottom of the water distributor outer cylinder 13 through a bottom plate 15. A plurality of orifices 16 with equal arc distance are arranged on the bottom plate 15, and the orifices 16 are connected with one end of the water distribution pipe 10. The water distribution pipe 10 is preferably a hose. The water distribution pipe 10 extends downward to the bottom of the reaction tank 2, and the other end of the water distribution pipe 10 is connected with the water distribution head 11 arranged at the bottom of the reaction tank 2. The water distribution head 11 has a horn structure with a narrow upper part and a wide lower part, and the water distribution head 11 is arranged with a supporting leg fixedly connected with the bottom of the reaction tank 2. The sewage in the adjusting tank 1 is pumped into the water distributor 9 of the reaction tank 2 through the water inlet pump 5, and the sewage is uniformly distributed from top to bottom to the bottom of the reaction tank 2 through the water distribution pipe 10 under the action of gravity, and then slowly and uniformly completes the water distribution into the reaction tank 2 through the water distribution head 11.

[0043] The longitudinal partition 7 is arranged below the water distribution system 6, at the middle of the reaction tank 2, parallel to the tank wall and at 1 / 2 of the tank width. The longitudinal partition 7 divides the reaction tank 2 from left to right into a first reaction zone 17 and a second reaction zone 18. The longitudinal partition 7 is provided with inclined flow guide inclined plates fixed on both sides of the longitudinal partition 7. The upper side of the longitudinal partition 7 is provided with a first flow guide inclined plate 19, and the lower side of the longitudinal partition 7 is provided with a second flow guide inclined plate 20. The first flow guide inclined plate 19 and the second flow guide inclined plate 20 are both at a certain angle with the longitudinal partition 7. The first flow guide inclined plate 19 is inclined to the first reaction zone 17, and the second flow guide inclined plate 20 is inclined to the second reaction zone 18.

[0044] The drainage system is arranged between the water distribution system 6 and the longitudinal partition 7 and comprises a water outlet weir 21, a water outlet pipe 22 and a strong drainage pipe 23, wherein the water outlet weir 21 is connected with the water outlet pipe 22. The water outlet weir 21 can collect the sewage overflowing from the upper part of the reaction tank 2 to the water outlet weir 21 and discharge the sewage to the water outlet pipe 22 for unified discharge. The strong drainage pipe 23 is arranged below the water outlet weir 21, and a strong drainage valve is arranged on the strong drainage pipe 23 and used for controlling the water outlet of the strong drainage pipe. After the water feeding of the reaction tank 2 is completed, part of the sewage is discharged from the strong drainage pipe 23 to reduce the liquid level height of the reaction tank 2 and prevent the sewage from overflowing the water outlet weir 21 due to the start of aeration under the full liquid level.

[0045] The single-side aeration system 8 is arranged at one side of the bottom of the reaction tank 2 and located in the second reaction zone 18. The single-side aeration system 8 is used to provide oxygen for the aerobic granular sludge in the reaction tank 2, and the single-side aeration system 8 can drive the sewage to flow circularly between the first reaction zone 17 and the second reaction zone 18. The single-side aeration system 8 comprises a plurality of aeration discs 24 and a blower 25 connected to the aeration discs 24. The aeration discs 24 are arranged alternately with the water distribution heads 11 at the bottom of the reaction tank 2. The single-side aeration system 8 and the longitudinal partition 7 can make the granular sludge and the sewage in the reaction tank 2 flow circularly along the height direction in the aeration stage, so as to provide stronger hydraulic shear force for the formation of the granular sludge.

[0046] The liftable sludge discharge system is connected to the longitudinal partition 7. The longitudinal partition 7 is provided with a movable slot 26, and the liftable sludge discharge system passes through the movable slot 26 and moves up and down in the movable slot 26. The liftable sludge discharge system can be used to control the biomass and discharge some difficult-to-settle flocculent sludge. The liftable sludge discharge system comprises a sludge main pipe 27, a plurality of sludge branch pipes 28 connected to the sludge main pipe 27, and a plurality of collection holes arranged on the sludge branch pipes 28 and used to collect the sludge. The sludge branch pipes 28 are arranged uniformly along the two sides of the sludge main pipe 27. A lifting guide rail 29 is arranged on one side of the inner wall of the reaction tank 2 and connected to the sludge main pipe 27. The sludge main pipe 27 can reciprocate along the arrangement direction of the lifting guide rail 29. A sludge hose 30 is further arranged in the reaction tank 2 and connected to the sludge main pipe 27 at one end. A sludge pipe 31 is arranged between the reaction tank 2 and a sludge storage tank 3, and a bottom sludge pump 32 is arranged on the sludge pipe 31. The other end of the sludge hose 30 is connected to the sludge pipe 31. A sludge outlet is arranged on the outer wall of one side of the reaction tank 2, and the sludge hose 30 and the sludge pipe 31 are connected through the sludge outlet. The sludge in the reaction tank 2 is collected by the sludge branch pipes 28, then transported to the sludge pipe 31 through the sludge hose 30, pumped to the sludge storage tank 3 by the bottom sludge pump 32, and finally stored in the sludge storage tank 3.

[0047] The sludge storage tank 3 is used to collect the sludge discharged by the liftable sludge discharge system in the reaction tank 2. A sludge backflow pipe 33 is arranged between the sludge storage tank 3 and the reaction tank 2, and the sludge backflow pipe 33 is connected to the lower part of the sludge storage tank 3 and the upper part of the reaction tank 2. A sludge backflow pump 34 is arranged on the sludge backflow pipe 33 and used to pump the sludge in the sludge storage tank 3 to the reaction tank 2.

[0048] An aerobic granular sludge rapid cultivation method is provided. The method is based on the device described above. The method is operated in a periodic sequence batch mode and achieves sewage treatment and granular sludge cultivation. Taking a typical operation cycle time as an example, the method comprises an influent / outflow stage, a strong discharge stage, an aeration stage and a sedimentation stage.

[0049] In the water-in / water-out stage, the sewage to be treated is pumped from the adjusting tank to the reaction tank by the water-in pump, and the water-in time is 60 minutes. The water-in amount of the sewage to be treated is 60% of the effective volume of the reaction tank. In the water-in stage, the sewage to be treated in the adjusting tank is pumped to the water distribution system in the reaction tank by the water-in pump through the water-in pipe. The water distribution system comprises a water distributor, a water distribution pipe and water distribution heads connected in sequence. The water distributor is arranged at the top of the reaction tank, and the water distribution heads are arranged at the bottom of the reaction tank. The sewage is sent to the water distributor in the water distribution system from the water-in pipe, and is distributed to the bottom of the reaction tank from top to bottom through the water distribution pipe by gravity, and is slowly and uniformly distributed to the reaction tank through the water distribution heads. In the water-out stage, the sewage to be treated gradually enters the reaction tank, and the sewage at the upper part of the reaction tank overflows to the water-out weir of the drainage system, is collected by the water-out weir and is discharged from the water-out pipe. That is, while the water is being in, the sewage reacted in the previous cycle is discharged at the same time, and the new-in sewage replaces the old water in 60% of the tank volume, and the liquid level of the reaction tank remains constant. The design that the water-in and water-out are completed in the same stage is simpler and saves equipment. After the water-in is completed, the strong drainage stage is entered.

[0050] In the strong drainage stage, the strong drainage valve on the strong drainage pipe is opened to drain water, and the water drainage time is 1 minute. The liquid level of the reactor is appropriately lowered to prevent the liquid level from surging after the subsequent aeration is started and the untreated sewage from overflowing. After the water drainage is completed, the strong drainage valve on the strong drainage pipe is closed, and the aeration stage is entered.

[0051] In the aeration stage, the air blower is started to perform aeration, and the aeration time is 300 minutes. During the aeration process, since the aeration is performed on only one side of the reaction tank, and the longitudinal partition plate is used to make the sewage form a circulation along the longitudinal partition plate and the flow guide inclined plate under the driving of the aeration, on one hand, the flow mode enhances the hydraulic shear in the reaction tank, which is beneficial to the formation of granular sludge, and on the other hand, an oxygen gradient is formed in the reaction tank, the dissolved oxygen is relatively low on the side of the partition plate without aeration, and an anoxic zone is formed. Different oxygen environments are provided at the same time to meet the needs of different microorganisms, and the removal capacity of the system for nitrogen and phosphorus is strengthened. After the aeration is completed, the air blower is closed, and the sedimentation stage is entered.

[0052] In the sedimentation stage, the sedimentation time is 10-40 minutes. The sedimentation time is gradually shortened as the proportion of the granular sludge increases.

[0053] In another embodiment, a flow promoter is further arranged in the reaction tank. The flow promoter is arranged on the other side of the bottom of the reaction tank. In the first reaction zone, the sewage is driven to form a circulating flow to the aeration disc under the action of the flow guide inclined plate and the flow promoter.

[0054] In another embodiment, the liftable sludge discharge system can also use a main air bag and an electric air valve instead of the lifting guide rail to drive the sludge pipe to move up and down. The main air bag is arranged at the lower edge of the sludge pipe, and the electric air valve is electrically connected with the main air bag. By opening the electric air valve, the main air bag is inflated, and as the electric air valve inflates the main air bag, the main air bag drives the sludge pipe to float up. By opening the electric air valve, the main air bag is deflated, and the air in the main air bag is discharged, so that the sludge pipe moves downward due to the disappearance of the buoyancy of the main air bag, thereby achieving the purpose of adjusting the height of the liftable sludge discharge system.

[0055] The device for rapidly cultivating aerobic granular sludge can eliminate problems such as uneven water distribution along the water distribution pipe and anaerobic water distribution air resistance that are prone to occur in the traditional water distribution mode, and can achieve uniform water distribution in the reaction tank.

[0056] The design that the water inlet and outlet are completed in the same stage is simpler, saves equipment, and can also save reaction cycle time, so that a longer water inlet time is set in the method, so that pollutants can be fully contacted and mass transferred to the inside of the granular sludge, and the mass transfer efficiency is greater than the utilization efficiency, so that the granular sludge also has nutrients in the inside and can grow in the inside, which is more conducive to the stability of the granular sludge.

[0057] Meanwhile, in the aeration stage, the longitudinal partition plate and the single-side aeration mode are used to realize natural circulation of the sludge-water mixture in the reaction tank, on the one hand to enhance the necessary hydraulic shear for forming the granular sludge, and on the other hand to form an anoxic zone on the side of the partition plate without aeration, to prevent sludge aging and disintegration caused by excessive aeration, and to strengthen the denitrification and phosphorus removal function of the reaction tank. In addition, the liftable sludge discharge system can discharge sludge with poor settling performance from the reaction tank according to different sludge screening requirements in the initial granular sludge formation period, the accelerated granulation period and the stable operation period, and can flexibly discharge sludge according to the process operation, so as to ensure that the flocculent sludge is always in a reasonable proportion range in the reaction tank, and to promote the formation and growth of the granular sludge.

[0058] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0059] The above describes only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An apparatus for rapid cultivation of aerobic granular sludge, comprising a reaction tank, characterized in that, The reaction tank is provided with a water distribution system, a longitudinal partition, a drainage system, a single-side aeration system and a liftable sludge discharge system; the water distribution system is arranged at the top of the reaction tank, the longitudinal partition is arranged below the water distribution system, the drainage system is arranged between the water distribution system and the longitudinal partition, the single-side aeration system is arranged at one side of the bottom of the reaction tank, and the liftable sludge discharge system is connected to the longitudinal partition; The water distribution system comprises a water distributor, a water distribution pipe and a water distribution head which are connected in sequence; the water distributor is arranged at the top of the reaction tank, and the water distribution head is arranged at the bottom of the reaction tank; The longitudinal partition divides the reaction tank into a first reaction zone and a second reaction zone; the single-side aeration system is arranged in the second reaction zone; The liftable sludge discharge system comprises a sludge discharge main pipe and a plurality of sludge discharge branch pipes connected to the sludge discharge main pipe; the longitudinal partition is provided with a movable groove, the sludge discharge main pipe passes through the movable groove and can move up and down in the movable groove; the sludge discharge branch pipes are provided with a plurality of collection holes; The water distributor comprises a water distributor body and a water distributor outer cylinder, the water distributor body is sleeved in the water distributor outer cylinder, the outer wall of the water distributor body is provided with a flow weir plate, the bottom of the water distributor body is connected to the bottom of the water distributor outer cylinder through a bottom plate, and the bottom plate is provided with a plurality of orifices with equal arc distances; one end of the water distribution pipe is connected to the orifices, and the other end of the water distribution pipe is connected to the water distribution head; The longitudinal partition is provided with guide inclined plates which are obliquely fixed on both sides of the longitudinal partition; the upper side of the longitudinal partition is provided with a first guide inclined plate, and the lower side of the longitudinal partition is provided with a second guide inclined plate; the first guide inclined plate and the second guide inclined plate are both at a certain angle with the longitudinal partition, the first guide inclined plate is inclined to the first reaction zone, and the second guide inclined plate is inclined to the second reaction zone.

2. The apparatus according to claim 1, wherein The drainage system comprises a water outlet weir, a water outlet pipe and a strong drainage pipe, the water outlet weir is arranged between the water distributor and the longitudinal partition, the water outlet weir is connected to the water outlet pipe, and the strong drainage pipe is arranged between the water outlet weir and the longitudinal partition.

3. The apparatus according to claim 2, wherein The single-side aeration system comprises an aeration disc and a blower, the aeration disc is arranged at the bottom of the reaction tank, and the blower is connected to the aeration disc.

4. The apparatus according to claim 3, wherein The liftable sludge discharge system further comprises a lifting guide rail; the lifting guide rail is arranged on one side of the inner wall of the reaction tank, the sludge discharge main pipe is connected to the lifting guide rail, and the sludge discharge main pipe can reciprocate along the arrangement direction of the lifting guide rail; the strong drainage pipe is provided with a strong drainage valve.

5. The device for rapid cultivation of aerobic granular sludge according to any one of claims 1 to 4, characterized in that, Further comprising a regulating tank and a sludge storage tank, the reaction tank, the regulating tank and the sludge storage tank are co-walled and built together; a water inlet pipe is arranged between the regulating tank and the reaction tank, and a water inlet pump is arranged on the water inlet pipe; a sludge discharge pipe is arranged between the sludge storage tank and the reaction tank, and a bottom sludge discharge pump is arranged on the sludge discharge pipe; a sludge discharge hose is further arranged in the reaction tank, one end of the sludge discharge hose is connected to the sludge discharge main pipe, and the other end of the sludge discharge hose is connected to the sludge discharge pipe.

6. The apparatus according to claim 5, wherein A sludge backflow pipe is further arranged between the sludge storage tank and the reaction tank, and a sludge backflow pump is arranged on the sludge backflow pipe.

7. A method for realizing the device for rapid cultivation of aerobic granular sludge according to any one of claims 1-6, characterized in that, The method comprises the following steps: a) water-in / water-out stage, the wastewater to be treated enters the reaction tank, the water-in time is 60-80 min, the water-in amount of the wastewater to be treated is 30-60% of the effective volume of the reaction tank; at the same time when the wastewater to be treated enters the reaction tank, the wastewater in the upper part of the reaction tank is discharged outwards, that is, at the same time when the water is in, the wastewater after completing the reaction in the last cycle is discharged outwards with the same water-in amount, after the water-in is completed, the strong discharge stage is entered; b) strong discharge stage, the water discharge system is started to control the liquid level, the water discharge time is 1-3 min, after the water discharge is completed, the water discharge system is closed, and the aeration stage is entered; c) aeration stage, the one-side aeration system is started to perform aeration, the aeration time is 200-300 min, after the aeration is completed, the one-side aeration system is closed, and the sedimentation stage is entered; d) sedimentation stage, the sedimentation time is 10-40 min.

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