Integrated partitioned nitrogen and phosphorus removal device

Abstract

The utility model discloses an integrated partitioned nitrogen and phosphorus removal device which is applied to an anaerobic ammonia oxidation-granular sludge treatment process and at least comprises eight unit pools, stirring devices are respectively arranged in a first unit pool, a second unit pool and a fifth unit pool, and aeration discs are arranged in a fourth unit pool and a sixth unit pool; the third unit pool and the seventh unit pool are sedimentation zones; the device is provided with at least one dosing unit pool, each dosing unit pool comprises at least three medicine cavities separated by partition plates, the medicine cavities are respectively a calcium salt cavity, a carbon source cavity and an alkali liquor cavity, a stirring device is installed in each medicine cavity, and the calcium salt cavity and the alkali liquor cavity are provided with a dosing pipe and a dosing pump which are communicated to a fourth unit pool. According to the utility model, the positions of the unit pools, the waterway structure, the trend and the dosing pipeline are scientifically and reasonably designed, so that the unit pools realize high-efficiency conveying and collaboration, and a simple and compact integrated partition layout is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and specifically relates to an integrated zoned denitrification and dephosphorization device. Background Art

[0002] In recent years, the treatment of phosphorus-containing wastewater with low carbon-nitrogen ratio and high ammonia nitrogen has attracted a lot of attention, especially livestock and poultry breeding wastewater. With the development of my country's economy, animal husbandry has also developed rapidly. While solving the supply of livestock and poultry products, a large amount of livestock and poultry breeding wastewater has also been generated. The amount of wastewater discharged by large-scale farms every day is large and concentrated, and the wastewater contains a large number of pollutants. Therefore, if such wastewater is discharged into the environment or directly used for agricultural purposes without treatment, it will cause serious pollution to the local ecological environment and farmland. In order to meet the relevant requirements of sewage discharge standards, it must be further post-treated before it can be discharged. The C / N ratio of anaerobic biogas slurry in aquaculture is relatively low. The use of traditional biological denitrification and phosphorus removal technology often has the disadvantages of low treatment load, poor stability, long sewage retention time, large footprint and high energy consumption, high investment, and large amount of residual sludge. Compared with traditional biological denitrification technology, anaerobic ammonia oxidation technology has many advantages such as high treatment efficiency, low aeration energy consumption, no waste sludge disposal problems, and smaller footprint.

[0003] The applicant is committed to developing and improving anaerobic ammonium oxidation technology and applying for patents, including the patent document disclosed in the application number 202310862821.5, an anaerobic ammonium oxidation granular sludge denitrification and phosphorus removal method and its device and application, the method comprising: (1) raw water slurry is independently fed into a primary pre-anoxic tank, an anaerobic tank and an integrated anaerobic ammonium oxidation reaction tank at three locations; the primary pre-anoxic tank also introduces return sludge; (2) the effluent from the anaerobic tank is fed into a primary sedimentation tank, and the supernatant from the primary sedimentation tank is fed into an integrated The anaerobic ammonium oxidation reaction tank, the bottom sludge is pumped into the secondary anoxic tank; (3) calcium salt is added to the integrated anaerobic ammonium oxidation reaction tank to form hydroxy calcium phosphate crystal nuclei to accelerate the formation of anaerobic ammonium oxidation granular sludge, and alkaline solution is added to control the pH value in the reaction tank to 7.5-8.3; (4) the effluent of the integrated anaerobic ammonium oxidation reaction tank is sent to the secondary anoxic tank, and the bottom of the secondary anoxic tank is connected to the aerobic tank; the effluent of the aerobic tank is sent to the secondary sedimentation tank, the supernatant of the secondary sedimentation tank meets the discharge standards, and the bottom sludge is returned to the primary pre-anoxic tank.

[0004] The above patented technology makes full use of the synergistic effects of anaerobic ammonia-oxidizing bacteria, nitrifying and denitrifying bacteria, polyphosphate bacteria, etc. to achieve effective treatment of wastewater. It has the advantages of high volumetric load, excellent nitrogen and phosphorus removal effects, and low treatment costs. However, the applicant found in the actual application of the technology of this project that the reaction system structure of the above patented technology still has room for refinement and improvement, and therefore further research and development and improvement of its structure are carried out. Summary of the invention

[0005] In view of the problems in the related technology, the utility model proposes an integrated partitioned denitrification and dephosphorization device to overcome the above-mentioned technical problems existing in the existing related technology.

[0006] The technical solution of the utility model is achieved in this way:

[0007] An integrated zoned nitrogen and phosphorus removal device is applied to the anaerobic ammonium oxidation-granular sludge treatment process, including at least eight unit pools;

[0008] There are at least five unit cells as reaction zones, which are respectively the first unit cell, the second unit cell, the fourth unit cell, the fifth unit cell and the sixth unit cell.

[0009] The first unit pool, the second unit pool and the fifth unit pool are respectively equipped with stirring devices, which are anaerobic-anoxic reaction zones. The first unit pool and the fifth unit pool are equipped with denitrification sludge, and the second unit pool is equipped with polyphosphate bacteria.

[0010] The fourth unit pool and the sixth unit pool are equipped with aeration plates, which are aeration reaction zones; the fourth unit pool is equipped with anaerobic ammonia oxidizing bacteria, and the sixth unit pool is equipped with nitrifying sludge and polyphosphate bacteria;

[0011] At least two unit pools are provided as sedimentation areas, which are respectively set as the third unit pool and the seventh unit pool;

[0012] The bottom of the first unit pool is connected to the bottom of the second unit pool, the top of the second unit pool is connected to the bottom of the third unit pool, the top of the third unit pool is connected to the bottom of the fourth unit pool, the top of the fourth unit pool is connected to the top of the fifth unit pool, the bottom of the fifth unit pool is connected to the bottom of the sixth unit pool, the top of the sixth unit pool is connected to the bottom of the seventh unit pool, and the bottom of the seventh unit pool is connected to the first unit pool;

[0013] At least one dosing unit pool is provided, and the dosing unit pool includes at least three medicine chambers separated by partitions, namely a calcium salt chamber, a carbon source chamber and an alkali solution chamber, each of which is equipped with a stirring device, the calcium salt chamber is provided with a first dosing pipe and a first dosing pump connected to the fourth unit pool, the alkali solution chamber is provided with a second dosing pipe and a second dosing pump connected to the fourth unit pool, and the carbon source chamber is provided with a third dosing pipe and a third dosing pump connected to the fifth unit pool.

[0014] First of all, the utility model design integrates multiple denitrification and phosphorus removal reaction unit pools and anaerobic ammonia oxidation reaction unit pools, and each anaerobic, anoxic, and aerobic unit pool can realize multiple denitrification biological reactions under different environments to achieve linked removal of nitrogen pollutants. The first unit pool performs denitrification reaction to remove nitric nitrogen in the return sludge to prevent nitric nitrogen from affecting the phosphorus release effect of the polyphosphate bacteria in the second unit pool. The second unit pool performs phosphorus release reaction and consumes organic matter in the raw water inlet. The third unit pool performs the first mud-water separation to prevent activated sludge from entering the fourth unit pool and affecting the anaerobic ammonia oxidation bacteria. The fourth unit pool removes part of the ammonia nitrogen and nitrite nitrogen after the anaerobic ammonia oxidation reaction, and can use the remaining organic matter to remove part of the nitric nitrogen through denitrification. The fifth unit pool further removes total nitrogen. The sixth unit pool is used to perform nitrification reaction and absorb and remove phosphate in the liquid phase under the action of polyphosphate bacteria. After the mud-water separation in the seventh unit pool, the upper liquid meets the discharge standard, and the sludge at the bottom flows back to the first unit pool.

[0015] Secondly, the position, waterway structure and direction of each unit pool are scientifically and reasonably designed, and a continuous water inlet and outlet operation mode is adopted to enable each unit pool to achieve efficient transportation and coordination, and finally form a streamlined and compact integrated zoning layout, which can effectively improve the wastewater treatment efficiency and treatment load of the utility model, save the floor space of the utility model, and save the energy consumption of the aeration disc fan.

[0016] Finally, due to the characteristics of low proliferation rate and low stability of anaerobic ammonia-oxidizing bacteria, the partitioned integrated one-piece design of the utility model can greatly improve the anaerobic ammonia oxidation efficiency and startup speed. At the same time, the utility model also designs a reasonable dosing pipeline to facilitate dosing, so that the utility model has a high anaerobic ammonia oxidation granular sludge formation efficiency while fixing phosphorus, forming a set of simple and efficient integrated mobile equipment, which can obtain more economical, efficient and stable denitrification and phosphorus removal effects, thereby solving the pollution problem of low carbon-nitrogen ratio, high ammonia nitrogen and phosphorus-containing wastewater in livestock and poultry breeding.

[0017] The utility model can achieve the efficient removal of ammonia nitrogen and total nitrogen from low carbon-nitrogen ratio, high ammonia nitrogen and phosphorus-containing wastewater such as aquaculture anaerobic biogas slurry, achieving an ammonia nitrogen removal rate of greater than 98% and a total nitrogen removal rate of greater than 97%, and can simultaneously achieve the effective removal and recycling of phosphorus resources in wastewater.

[0018] Preferably, a first water inlet is provided at the top of the first unit pool, and a first water outlet is provided at the bottom, and the first water outlet is connected to the bottom of the second unit pool;

[0019] The utility model also includes a raw water inlet assembly, which includes a raw water valve, a raw water flange, a raw water pump and a plurality of raw water perforated pipes, which are respectively connected to the first unit pool, the second unit pool and the fourth unit pool, and untreated raw water is transported to the first water inlet of the first unit pool, the second unit pool and the fourth unit pool through the raw water pump and the raw water perforated pipes. Specifically, the diameter of the first perforated pipe is DN25.

[0020] The purpose of the pipeline design of the raw water inlet component is to: the effluent from the first unit tank is mixed with part of the raw water and enters the second unit tank to release phosphorus and consume organic matter in the raw water; the effluent from the third unit tank is also mixed with part of the raw water and enters the fourth unit tank to undergo anaerobic ammonia oxidation reaction to remove part of the ammonia nitrogen and nitrite nitrogen, and the remaining organic matter can be used to remove part of the nitrate nitrogen through denitrification, thereby achieving a higher denitrification efficiency.

[0021] Preferably, a second water inlet is provided at the bottom of the second unit pool, and the second water inlet is connected to the first water outlet;

[0022] The second unit pool is provided with a second water outlet at the top, and the second water outlet is provided with a second water outlet assembly to be connected to the bottom side wall of the third unit pool, and the liquid in the second unit pool flows to the third unit pool in an overflow manner through the second water outlet. The second water outlet assembly includes a second perforated pipe and second flange ports at both ends of the second perforated pipe, and the diameter of the second perforated pipe is DN25.

[0023] Preferably, a third water inlet is provided on the bottom side wall of the third unit pool, and the third water inlet is connected to the second water outlet;

[0024] A third water outlet is provided on the top of the third unit pool, and the height of the third water outlet is 0.2 to 0.3 m lower than that of the second water outlet;

[0025] The third water outlet is equipped with a third water outlet assembly to be connected to the bottom of the fourth unit pool, the third water outlet assembly includes a third perforated pipe and third flange ports located at both ends of the third perforated pipe, and the diameter of the third perforated pipe is DN25;

[0026] A third mud outlet is provided at the bottom of the third unit pool, and the third mud outlet is externally connected to a third mud pump and an adapted pipeline to communicate with the fifth unit pool.

[0027] Preferably, a fourth water inlet is provided at the bottom of the fourth unit pool, and the fourth water inlet is connected to the third water outlet;

[0028] A fourth water outlet is provided on the top of the fourth unit pool, and the height of the fourth water outlet is 0.2-0.3 m lower than that of the third water outlet, so that the liquid level of the fourth unit pool is controlled to be lower than that of the third unit pool, thereby ensuring that the liquid in the third unit pool can flow to the fourth unit pool continuously and smoothly to avoid backflow;

[0029] The fourth water outlet is equipped with a fourth water outlet assembly to connect to the top of the fifth unit pool, and the liquid in the fourth unit pool flows to the fifth unit pool in an overflow manner through the fourth water outlet. The fourth water outlet assembly includes a fourth perforated pipe and fourth flange ports located at both ends of the fourth perforated pipe, and the diameter of the fourth perforated pipe is DN25;

[0030] The fourth water outlet and the fourth water inlet of the fourth unit pool are communicated with each other and are provided with a fourth reflux pump and a matching pipeline. The reflux rising operation is beneficial to the formation of granular sludge in the fourth unit pool.

[0031] Preferably, a fifth water inlet is provided on the top of the fifth unit pool, and the fifth water inlet is connected to the fourth water outlet;

[0032] A fifth water outlet is provided at the bottom of the fifth unit pool, a sixth water inlet is provided at the bottom of the sixth unit pool, the fifth water outlet is connected to the sixth water inlet, and the water pressure causes the contents of the fifth unit pool to flow to the sixth unit pool;

[0033] The upper part of the sixth unit pool is communicated with the fifth water inlet and is provided with a sixth reflux pump.

[0034] A sixth water outlet is provided on the top of the sixth unit pool, and the height of the sixth water outlet is 0.2-0.3 m lower than that of the fourth water outlet, so that the liquid level of the fifth unit pool and the sixth unit pool is controlled to be lower than that of the fourth unit pool, so as to ensure that the liquid in the fourth unit pool can flow to the fifth unit pool and the sixth unit pool in sequence continuously and smoothly to avoid backflow;

[0035] The sixth water outlet is installed with a sixth water outlet assembly to be connected to the bottom of the seventh unit pool. The sixth water outlet assembly includes a sixth perforated pipe and sixth flange openings at both ends of the sixth perforated pipe. The diameter of the sixth perforated pipe is DN25.

[0036] Preferably, a seventh water inlet is provided at the bottom of the seventh unit pool, and the seventh water inlet is connected to the sixth water outlet;

[0037] A total water outlet is provided on the top of the seventh unit pool, and the height of the total water outlet is 0.2-0.3 m lower than that of the sixth water outlet, so that the liquid level of the seventh unit pool is controlled to be lower than that of the sixth unit pool, so as to ensure that the liquid in the sixth unit pool can flow to the seventh unit pool continuously and smoothly to avoid backflow;

[0038] The total water outlet is installed with a seventh water outlet assembly to connect to the external environment or other equipment. The seventh water outlet assembly includes a seventh perforated pipe and seventh flange openings located at both ends of the seventh perforated pipe. The diameter of the seventh perforated pipe is DN25.

[0039] A seventh mud outlet is provided at the bottom of the seventh unit pool, and the seventh mud outlet is externally connected to a seventh mud pump and an adapter pipe to communicate with the first unit pool.

[0040] Preferably, the upper part of the third unit cell and the seventh unit cell is a cylindrical cavity structure, and the lower part is a conical cavity structure, and the wide end of the conical cavity structure is connected to the cylindrical cavity structure;

[0041] The third unit pool and the seventh unit pool are internally installed with an inclined tube sedimentation device, so that the effluent of the pre-reaction unit pool can be clarified before being transported to the next unit pool or discharged.

[0042] Preferably, the fourth unit pool is provided with granular sludge and fillers for microorganisms to attach, the particle size of the granular sludge is 0.2-3.0 mm, and the diameter of the fillers is 120-180 mm.

[0043] Preferably, the aeration disk is a disc-type microporous aeration head with a diameter of 350 to 450 mm.

[0044] Preferably, each unit pool is separated by a partition, and the total length of the integrated partitioned denitrification and phosphorus removal device is 3.5 to 4.5 m, the width is 2.5 to 3.5 m, the height is 2.5 to 3.5 m, and the effective height of each unit pool is 2.0 to 2.5 m. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the utility model;

[0046] Figure 2 It is a schematic diagram of the conveying flow direction of the utility model.

[0047] Marking Description:

[0048] 1. First unit pool; 1-1. First water inlet; 1-2. First stirring device;

[0049] 2. Second unit pool; 2-1. Second stirring device; 2-2. Second water outlet;

[0050] 3. The third unit pool; 3-1. The third inclined tube sedimentation device; 3-2. The third water outlet;

[0051] 4. Fourth unit pool; 4-1. Filler; 4-2. Fourth aeration plate; 4-3. Fourth water outlet;

[0052] 5. The fifth unit pool; 5-1. The fifth stirring device;

[0053] 6. The sixth unit pool; 6-1. The sixth aeration plate; 6-2. The sixth water outlet;

[0054] 7. The seventh unit pool; 7-1. The seventh inclined tube sedimentation device; 7-2. The seventh water outlet;

[0055] 8. Dosing unit pool; 8-1. Calcium salt chamber; 8-2. Alkaline solution chamber; 8-3. Carbon source chamber. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] like Figure 1 and Figure 2 As shown, an integrated zoned nitrogen and phosphorus removal device is applied to the anaerobic ammonium oxidation-granular sludge treatment process, including eight unit pools;

[0059] There are five unit cells as reaction areas, which are respectively the first unit cell 1, the second unit cell 2, the fourth unit cell 4, the fifth unit cell 5 and the sixth unit cell 6.

[0060] The first unit pool 1, the second unit pool 2 and the fifth unit pool 5 are respectively equipped with stirring devices, specifically the first stirring device 1-2, the second stirring device 2-1 and the fifth stirring device 5-1, which are anaerobic-anoxic reaction zones. The first unit pool 1 and the fifth unit pool 5 are equipped with denitrification sludge, and the second unit pool 2 is equipped with polyphosphate bacteria.

[0061] The fourth unit pool 4 and the sixth unit pool 6 are equipped with aeration disks, specifically the fourth aeration disk 4-2 and the sixth aeration disk 6-1, which are aeration reaction zones. The aeration disks are disc-type microporous aeration heads with a diameter of 400 mm. The fourth unit pool 4 is equipped with anaerobic ammonia-oxidizing bacteria, and the sixth unit pool 6 is equipped with nitrifying sludge and polyphosphate bacteria.

[0062] Two unit pools are provided as sedimentation areas, which are respectively set as the third unit pool 3 and the seventh unit pool 7;

[0063] The bottom of the first unit pool 1 is connected to the bottom of the second unit pool 2, the top of the second unit pool 2 is connected to the bottom of the third unit pool 3, the top of the third unit pool 3 is connected to the bottom of the fourth unit pool 4, the top of the fourth unit pool 4 is connected to the top of the fifth unit pool 5, the bottom of the fifth unit pool 5 is connected to the bottom of the sixth unit pool 6, the top of the sixth unit pool 6 is connected to the bottom of the seventh unit pool 7, and the bottom of the seventh unit pool 7 is connected to the first unit pool 1;

[0064] A dosing unit pool 8 is provided, and the dosing unit pool 8 includes three medicine chambers separated by partitions, namely a calcium salt chamber 8-1 (for adding calcium chloride), an alkali solution chamber 8-2 (for adding sodium carbonate) and a carbon source chamber 8-3 (for adding sodium acetate). A stirring device is installed in each medicine chamber. The calcium salt chamber 8-1 is provided with a first dosing pipe and a first dosing pump connected to the fourth unit pool, the alkali solution chamber 8-2 is provided with a second dosing pipe and a second dosing pump connected to the fourth unit pool, and the carbon source chamber 8-3 is provided with a third dosing pipe and a third dosing pump connected to the fifth unit pool.

[0065] First of all, the design of the utility model integrates multiple denitrification and phosphorus removal reaction unit pools and anaerobic ammonia oxidation reaction unit pools, and each anaerobic, anoxic, and aerobic unit pool can realize a variety of denitrification biological reactions under different environments to achieve linked removal of nitrogen pollutants. The first unit pool 1 performs a denitrification reaction to remove nitric nitrogen in the return sludge to prevent nitric nitrogen from affecting the phosphorus release effect of the polyphosphate bacteria in the second unit pool. The second unit pool 2 performs a phosphorus release reaction and consumes organic matter in the raw water inlet. The third unit pool 3 performs the first mud-water separation. The fourth unit pool 4 performs an anaerobic ammonia oxidation reaction to remove part of the ammonia nitrogen and nitrite nitrogen, and can use the remaining organic matter to remove part of the nitric nitrogen through denitrification. The fifth unit pool 5 further removes total nitrogen. The sixth unit pool 6 is used to perform a nitrification reaction and absorb and remove phosphates in the liquid phase under the action of polyphosphate bacteria. After the mud-water separation in the seventh unit pool, the upper liquid meets the discharge standard, and the sludge at the bottom flows back to the first unit pool.

[0066] Secondly, the position, waterway structure and direction of each unit pool are scientifically and reasonably designed, and a continuous water inlet and outlet operation mode is adopted to enable each unit pool to achieve efficient transportation and coordination, and finally form a streamlined and compact integrated zoning layout, which can effectively improve the wastewater treatment efficiency and treatment load of the utility model, save the floor space of the utility model, and save the energy consumption of the aeration disc fan.

[0067] Finally, due to the characteristics of low proliferation rate and low stability of anaerobic ammonia-oxidizing bacteria, the partitioned integrated one-piece design of the utility model can greatly improve the anaerobic ammonia oxidation efficiency and startup speed. At the same time, the utility model also designs a reasonable dosing pipeline to facilitate dosing, so that the utility model has a high anaerobic ammonia oxidation granular sludge formation efficiency while fixing phosphorus, forming a set of simple and efficient integrated mobile equipment, which can obtain more economical, efficient and stable denitrification and phosphorus removal effects, thereby solving the pollution problem of low carbon-nitrogen ratio, high ammonia nitrogen and phosphorus-containing wastewater in livestock and poultry breeding.

[0068] The utility model can achieve the efficient removal of ammonia nitrogen and total nitrogen from low carbon-nitrogen ratio, high ammonia nitrogen and phosphorus-containing wastewater such as aquaculture anaerobic biogas slurry, achieving an ammonia nitrogen removal rate of greater than 98% and a total nitrogen removal rate of greater than 97%, and can simultaneously achieve the effective removal and recycling of phosphorus resources in wastewater.

[0069] In this embodiment, a first water inlet 1-1 is provided at the top of the first unit pool 1, and a first water outlet is provided at the bottom, and the first water outlet is connected to the bottom of the second unit pool 2;

[0070] The utility model also includes a raw water inlet assembly, which includes a raw water valve, a raw water flange, a raw water pump and a plurality of raw water perforated pipes, which are respectively connected to the first unit pool 1, the second unit pool 2 and the fourth unit pool 4, and the untreated raw water is transported to the first water inlet 1-1 of the first unit pool 1, the second unit pool 2 and the fourth unit pool 4 through the raw water pump and the raw water perforated pipes. Specifically, the diameter of the first perforated pipe is DN25.

[0071] The purpose of the pipeline design of the raw water inlet component is to: the effluent from the first unit tank is mixed with part of the raw water and enters the second unit tank to release phosphorus and consume organic matter in the raw water; the effluent from the third unit tank is also mixed with part of the raw water and enters the fourth unit tank to undergo anaerobic ammonia oxidation reaction to remove part of the ammonia nitrogen and nitrite nitrogen, and the remaining organic matter can be used to remove part of the nitrate nitrogen through denitrification, thereby achieving a higher denitrification efficiency.

[0072] In this embodiment, a second water inlet is provided at the bottom of the second unit pool 2, and the second water inlet is connected to the first water outlet;

[0073] A second water outlet 2-2 is provided at the top of the second unit pool 2, and a second water outlet assembly is installed at the second water outlet 2-2 to be connected to the bottom side wall of the third unit pool 3, and the liquid in the second unit pool 2 flows to the third unit pool 3 in an overflow manner through the second water outlet 2-2. The second water outlet assembly includes a second perforated pipe and second flange ports at both ends of the second perforated pipe, and the diameter of the second perforated pipe is DN25.

[0074] A second mud outlet is provided at the bottom of the second unit pool 2, and the second mud outlet is externally connected to a second mud pump and an adapted pipeline to communicate with the bottom of the third unit pool.

[0075] In this embodiment, a third water inlet and a third mud inlet are provided on the bottom side wall of the third unit pool 3, the third water inlet is connected to the second water outlet 2-2, and the third mud inlet is connected to the second mud outlet and the mud discharge pump;

[0076] A third water outlet 3-2 is provided on the top of the third unit pool 3, and the height of the third water outlet 3-2 is 0.2-0.3m lower than that of the second water outlet 2-2. The liquid level of the third unit pool 3 is controlled to be lower than that of the second unit pool 2, so as to ensure that the liquid in the second unit pool 2 can flow to the third unit pool continuously and smoothly to avoid backflow;

[0077] The third water outlet 3-2 is installed with a third water outlet assembly to be connected to the bottom of the fourth unit pool 4, and the liquid in the third unit pool 3 flows to the fourth unit pool 4 in an overflow manner through the third water outlet 3-2. The third water outlet assembly includes a third perforated pipe and third flange ports located at both ends of the third perforated pipe, and the pipe diameter of the third perforated pipe is DN25.

[0078] In this embodiment, a fourth water inlet is provided at the bottom of the fourth unit pool 4, and the fourth water inlet is connected to the third water outlet 3-2;

[0079] A fourth water outlet 4-3 is provided on the top of the fourth unit pool 4, and the height of the fourth water outlet 4-3 is 0.2-0.3 m lower than the third water outlet 3-2, so that the liquid level of the fourth unit pool 4 is controlled to be lower than that of the third unit pool 3, so as to ensure that the liquid in the third unit pool 3 can flow to the fourth unit pool continuously and smoothly to avoid backflow;

[0080] The fourth water outlet 4-3 is installed with a fourth water outlet assembly to connect to the top of the fifth unit pool 5, and the liquid in the fourth unit pool 4 flows to the fifth unit pool 5 in an overflow manner through the fourth water outlet 4-3. The fourth water outlet assembly includes a fourth perforated pipe and fourth flange ports located at both ends of the fourth perforated pipe, and the diameter of the fourth perforated pipe is DN25;

[0081] The fourth water outlet 4 - 3 and the fourth water inlet of the fourth unit pool 4 are communicated with each other and are provided with a fourth reflux pump.

[0082] In this embodiment, the fourth unit pool 4 is provided with granular sludge (particle size is 0.2-3.0 mm) and filler 4-1 for microorganisms to attach to form a thick biofilm. The filler 4-1 is a combined biochemical elastic filler 4-1, and the diameter of the filler 4-1 is 150 mm.

[0083] In this embodiment, a fifth water inlet is provided on the top of the fifth unit pool 5, and the fifth water inlet is connected to the fourth water outlet 4-3;

[0084] A fifth water outlet is provided at the bottom of the fifth unit pool 5, and a sixth water inlet is provided at the bottom of the sixth unit pool 6. The fifth water outlet is connected to the sixth water inlet, and the existence of water pressure causes the contents of the fifth unit pool 5 to flow to the sixth unit pool 6.

[0085] The upper part of the sixth unit pool is communicated with the fifth water inlet and is provided with a sixth reflux pump.

[0086] A sixth water outlet 6-2 is provided on the top of the sixth unit pool 6, and the height of the sixth water outlet 6-2 is 0.2-0.3 m lower than that of the fourth water outlet 4-3, so as to control the liquid level of the fifth unit pool 5 and the sixth unit pool to be lower than that of the fourth unit pool 4, thereby ensuring that the liquid in the fourth unit pool 4 can flow to the fifth unit pool 5 and the sixth unit pool 6 in sequence continuously and smoothly, and avoid backflow;

[0087] The sixth water outlet 6-2 is installed with a sixth water outlet assembly to connect to the bottom of the seventh unit pool 7. The sixth water outlet assembly includes a sixth perforated pipe and sixth flanges at both ends of the sixth perforated pipe. The diameter of the sixth perforated pipe is DN25.

[0088] In this embodiment, a seventh water inlet is provided at the bottom of the seventh unit pool 7, and the seventh water inlet is connected to the sixth water outlet 6-2;

[0089] A total water outlet is provided on the top of the seventh unit pool 7, and the height of the total water outlet is 0.2-0.3 m lower than the sixth water outlet 6-2, so that the liquid level of the seventh unit pool 7 is controlled to be lower than the sixth unit pool 6, so as to ensure that the liquid in the sixth unit pool 6 can flow to the seventh unit pool continuously and smoothly to avoid backflow;

[0090] The total water outlet is installed with a seventh water outlet assembly to connect to the external environment or other equipment. The seventh water outlet assembly includes a seventh perforated pipe and seventh flange openings located at both ends of the seventh perforated pipe. The diameter of the seventh perforated pipe is DN25.

[0091] A seventh mud outlet is provided at the bottom of the seventh unit pool 7 , and the seventh mud outlet is externally connected to a seventh mud pump and an adapter pipe to communicate with the first unit pool 1 .

[0092] In this embodiment, the upper part of the third unit pool 3 and the seventh unit pool 7 is a cylindrical cavity structure, and the lower part is a conical cavity structure, and the wide end of the conical cavity structure is connected to the cylindrical cavity structure;

[0093] The third unit pool 3 and the seventh unit pool 7 are internally installed with inclined tube sedimentation devices, specifically the third inclined tube sedimentation device 3-1 and the seventh inclined tube sedimentation device 7-1, so that the effluent of the pre-reaction unit pool can be clarified before being transported to the next unit pool or discharged.

[0094] In this embodiment, each unit pool is separated by a partition. The total length of the integrated partitioned denitrification and phosphorus removal device is 4m, the width is 3m, and the height is 3m. The effective height of each unit pool is 2.0 to 2.5m.

[0095] The operating principle of this embodiment is:

[0096] A continuous inlet and outlet water operation mode is adopted. After the low carbon-nitrogen ratio, high ammonia nitrogen and phosphorus-containing wastewater such as anaerobic fermentation sludge from aquaculture enters the first unit pool 1 through the raw water inlet component, it is mixed with the return sludge from the seventh unit pool 7 and treated together. Denitrification reaction is carried out in the first unit pool 1 to remove nitric nitrogen in the return sludge to prevent nitric nitrogen from affecting the phosphorus release effect of polyphosphate bacteria in the second unit pool 2.

[0097] The effluent from the first unit pool 1 is mixed with part of the raw water and enters the second unit pool 2 to start the phosphorus release reaction. Polyphosphate-accumulating bacteria use the organic matter in the raw water to synthesize the storage material "poly-β-hydroxybutyrate (PHB)" of the intracellular carbon source, thereby completing the release of phosphate and consuming the organic matter in the raw water.

[0098] After treatment in the second unit pool 2, the effluent enters the third unit pool 3 for sedimentation to achieve mud-water separation.

[0099] The supernatant effluent from the third unit pool 3 and part of the raw water enter the fourth unit pool 4 and stay there for a certain period of time, where ammonia nitrogen is converted into nitrite nitrogen. Subsequently, the remaining ammonia nitrogen in the wastewater and the converted nitrite nitrogen enter the granular sludge and are used as reaction substrates by anaerobic ammonia-oxidizing bacteria to undergo anaerobic ammonia oxidation reactions, converting nitrogen into nitrogen gas for removal. At the same time, since the influent contains certain organic matter, the COD / ammonia nitrogen concentration of the influent entering the fourth unit pool 4 is less than 0.3, and denitrification coupling will occur in the fourth unit pool 4. The nitrate nitrogen generated by the anaerobic ammonia oxidation reaction will be removed by denitrification, thereby achieving a substantial removal of ammonia nitrogen and total nitrogen, and entering the fifth unit pool 5.

[0100] By adding an appropriate amount of organic matter to the fifth unit pool 5, total nitrogen can be further removed, and part of the total phosphorus is removed in the sixth unit pool 6, while the other part of the total phosphorus undergoes a phosphorus release reaction in the second unit pool 2 after the sludge is returned through the seventh unit pool 7. An appropriate amount of calcium salt is added to the supernatant effluent of the third unit pool 3 to generate calcium hydroxyphosphate, which can be used as a crystal nucleus for anaerobic ammonia-oxidizing bacteria. New anaerobic ammonia-oxidizing bacteria cells will attach to it and grow to form larger aggregates, thereby maintaining an efficient and stable anaerobic ammonia-oxidizing granular sludge system. The ammonia nitrogen in the wastewater treated by this embodiment can meet the discharge standards, and the nitrite nitrogen and nitric nitrogen in the effluent are almost zero, which can be directly discharged through the total outlet of the seventh unit pool 7.

[0101] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation mode. Therefore, the utility model is not limited to the specific implementation modes disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. An integrated zoned denitrification and phosphorus removal device, applied to anaerobic ammonium oxidation-granular sludge treatment process, characterized in that: Includes at least eight unit pools; There are at least five unit cells as reaction zones, which are respectively the first unit cell, the second unit cell, the fourth unit cell, the fifth unit cell and the sixth unit cell. The first unit pool, the second unit pool and the fifth unit pool are respectively equipped with stirring devices, which are anaerobic-anoxic reaction zones. The first unit pool and the fifth unit pool are equipped with denitrification sludge, and the second unit pool is equipped with polyphosphate bacteria. The fourth unit pool and the sixth unit pool are equipped with aeration plates, which are aeration reaction zones; the fourth unit pool is equipped with anaerobic ammonia oxidizing bacteria, and the sixth unit pool is equipped with nitrifying sludge and polyphosphate bacteria; At least two unit pools are provided as sedimentation areas, which are respectively set as the third unit pool and the seventh unit pool; The bottom of the first unit pool is connected to the bottom of the second unit pool, the top of the second unit pool is connected to the bottom of the third unit pool, the top of the third unit pool is connected to the bottom of the fourth unit pool, the top of the fourth unit pool is connected to the top of the fifth unit pool, the bottom of the fifth unit pool is connected to the bottom of the sixth unit pool, the top of the sixth unit pool is connected to the bottom of the seventh unit pool, and the bottom of the seventh unit pool is connected to the first unit pool; At least one dosing unit pool is provided, and the dosing unit pool includes at least three separated drug chambers, namely a calcium salt chamber, a carbon source chamber and an alkali solution chamber, each of which is equipped with a stirring device, the calcium salt chamber is provided with a first dosing pipe and a first dosing pump connected to the fourth unit pool, the alkali solution chamber is provided with a second dosing pipe and a second dosing pump connected to the fourth unit pool, and the carbon source chamber is provided with a third dosing pipe and a third dosing pump connected to the fifth unit pool.

2. The integrated zoned denitrification and dephosphorization device according to claim 1 is characterized in that: The first unit pool has a first water inlet at the top and a first water outlet at the bottom, and the first water outlet is connected to the bottom of the second unit pool; The integrated zoned denitrification and phosphorus removal device also includes a raw water inlet assembly, which includes a raw water valve, a raw water flange, a raw water pump and a plurality of raw water perforated pipes, wherein the plurality of raw water perforated pipes are respectively connected to the first unit pool, the second unit pool and the fourth unit pool, and the untreated raw water is transported to the first water inlet of the first unit pool, the second unit pool and the fourth unit pool through the raw water pump and the raw water perforated pipes.

3. The integrated zoned denitrification and dephosphorization device according to claim 2 is characterized in that: A second water inlet is provided at the bottom of the second unit pool, and the second water inlet is connected to the first water outlet; A second water outlet is provided at the top of the second unit pool, and a second water outlet assembly is installed at the second water outlet to connect to the bottom side wall of the third unit pool. The second water outlet assembly includes a second perforated pipe and second flange openings at both ends of the second perforated pipe. The diameter of the second perforated pipe is DN25.

4. The integrated zoned denitrification and dephosphorization device according to claim 3 is characterized in that: A third water inlet is provided on the bottom side wall of the third unit pool, and the third water inlet is connected to the second water outlet; A third water outlet is provided on the top of the third unit pool, and the height of the third water outlet is 0.2 to 0.3 m lower than that of the second water outlet; The third water outlet is equipped with a third water outlet assembly to be connected to the bottom of the fourth unit pool, the third water outlet assembly includes a third perforated pipe and third flange ports located at both ends of the third perforated pipe, and the diameter of the third perforated pipe is DN25; A third mud outlet is provided at the bottom of the third unit pool, and the third mud outlet is externally connected to a third mud pump and an adapted pipeline to communicate with the fifth unit pool.

5. The integrated zoned denitrification and dephosphorization device according to claim 4 is characterized in that: A fourth water inlet is provided at the bottom of the fourth unit pool, and the fourth water inlet is connected to the third water outlet; A fourth water outlet is provided on the top of the fourth unit pool, and the height of the fourth water outlet is 0.2 to 0.3 m lower than that of the third water outlet; The fourth water outlet is equipped with a fourth water outlet assembly to be connected to the top of the fifth unit pool, the fourth water outlet assembly includes a fourth perforated pipe and fourth flanges at both ends of the fourth perforated pipe, and the diameter of the fourth perforated pipe is DN25; The fourth water outlet and the fourth water inlet of the fourth unit pool are communicated with each other and are provided with a fourth reflux pump and a matching pipeline.

6. The integrated zoned denitrification and dephosphorization device according to claim 5 is characterized in that: A fifth water inlet is provided on the top of the fifth unit pool, and the fifth water inlet is connected to the fourth water outlet; A fifth water outlet is provided at the bottom of the fifth unit pool, a sixth water inlet is provided at the bottom of the sixth unit pool, and the fifth water outlet is connected to the sixth water inlet; The upper part of the sixth unit pool is communicated with the fifth water inlet and is provided with a sixth reflux pump; A sixth water outlet is provided on the top of the sixth unit pool, and the height of the sixth water outlet is 0.2 to 0.3 m lower than that of the fourth water outlet; The sixth water outlet is installed with a sixth water outlet assembly to be connected to the bottom of the seventh unit pool. The sixth water outlet assembly includes a sixth perforated pipe and sixth flange openings at both ends of the sixth perforated pipe. The diameter of the sixth perforated pipe is DN25.

7. The integrated zoned denitrification and dephosphorization device according to claim 6 is characterized in that: A seventh water inlet is provided at the bottom of the seventh unit pool, and the seventh water inlet is connected to the sixth water outlet; A total water outlet is provided on the top of the seventh unit pool, and the height of the total water outlet is 0.2 to 0.3 m lower than that of the sixth water outlet; The main water outlet is equipped with a seventh water outlet assembly to communicate with the external environment, the seventh water outlet assembly includes a seventh perforated pipe and seventh flange ports located at both ends of the seventh perforated pipe, and the diameter of the seventh perforated pipe is DN25; A seventh mud outlet is provided at the bottom of the seventh unit pool, and the seventh mud outlet is externally connected to a seventh mud pump and an adapter pipe to communicate with the first unit pool.

8. The integrated zoned denitrification and dephosphorization device according to any one of claims 1 to 7, characterized in that: The upper part of the third unit pool and the seventh unit pool is a cylindrical cavity structure, and the lower part is a conical cavity structure, and the wide end of the conical cavity structure is connected to the cylindrical cavity structure; An inclined tube sedimentation device is installed inside the third unit pool and the seventh unit pool.

9. The integrated zoned denitrification and dephosphorization device according to any one of claims 1 to 7, characterized in that: The fourth unit pool is provided with granular sludge and fillers for microorganisms to attach, the particle size of the granular sludge is 0.2-3.0 mm, and the diameter of the fillers is 120-180 mm; The aeration disk is a disc-type microporous aeration head with a diameter of 350 to 450 mm.

10. The integrated zoned denitrification and dephosphorization device according to any one of claims 1 to 7, characterized in that: The total length of the integrated zoned denitrification and dephosphorization device is 3.5 to 4.5 m, the width is 2.5 to 3.5 m, the height is 2.5 to 3.5 m, and the effective height of each unit pool is 2.0 to 2.5 m.

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