Continuous integrated short-cut nitrification-anaerobic ammonia oxidation system and continuous integrated short-cut nitrification-anaerobic ammonia oxidation method

Abstract

The invention relates to the technical field of sewage treatment, and provides a continuous integrated short-cut nitrification-anaerobic ammonia oxidation system and a continuous integrated short-cut nitrification-anaerobic ammonia oxidation method. The system comprises a water inlet device; a clarification unit, a short-cut denitrification unit, an anaerobic ammonia oxidation unit, a sludge separation unit and a short-cut nitrification unit are arranged in the short-cut nitrification-anaerobic ammonia oxidation main body reactor; the sludge separation unit is configured to separate granular sludge smaller than a preset size into the sludge up-flow regeneration device, and the sludge up-flow regeneration device is configured to crush the granular sludge smaller than the preset size, form granular sludge not smaller than the preset size and convey the granular sludge to the short-cut nitrification unit. The granular sludge can be screened and recycled, regeneration of the granular sludge is promoted, the short-cut denitrification technology is coupled, and long-term stable operation of the device can be achieved.

Description

Technical Field

[0001] The present application relates to sewage treatment technology, and more particularly to a continuous integrated short-range nitrification-anaerobic ammonium oxidation system and method. Background Art

[0002] The treatment of high-ammonia nitrogen wastewater has always been a key research direction in the field of industrial wastewater treatment. Anaerobic ammonium oxidation is a new biological denitrification technology in wastewater treatment, that is, under anaerobic conditions, ammonia is used as an electron donor and nitrite is used as an electron acceptor to oxidize ammonia into nitrogen. The short-range nitrification-anaerobic ammonium oxidation process derived on this basis can achieve autotrophic denitrification without adding a carbon source, while saving 60% of aeration energy consumption, and is a promising and efficient biological denitrification process.

[0003] The short-range nitrification-anaerobic ammonium oxidation process can be divided into an integrated process and a split process. In the integrated system, both reaction stages are carried out in one reactor, and two functional bacteria: AOB, ammonia-oxidizing bacteria (Ammonia-oxidizing bacteria) and AnAOB, anaerobic ammonium-oxidizing bacteria (Anaerobic Ammonium-Oxidizing Bacteria) coexist, which has the advantages of low construction cost, small footprint, large volume load, and can effectively avoid the inhibition caused by nitrite accumulation. Therefore, it has a wider range of engineering applications.

[0004] However, the formation, stabilization and regeneration of anaerobic ammonium oxidation granular sludge are difficult and easily affected by load shocks, resulting in system instability. Summary of the invention

[0005] The present application provides a continuous integrated short-range nitrification-anaerobic ammonium oxidation system and method, which can screen and reuse granular sludge, promote granular sludge regeneration, and couple with a short-range denitrification process to achieve long-term stable operation of the device.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a continuous integrated short-range nitrification-anaerobic ammonium oxidation system, comprising:

[0008] Water inlet device;

[0009] The short-cut nitrification-anaerobic ammonium oxidation main reactor is connected to the water inlet device; the short-cut nitrification-anaerobic ammonium oxidation main reactor is provided with a clarification unit, a short-cut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a short-cut nitrification unit;

[0010] A sludge upflow regeneration device, which is connected to the sludge separation unit and the clarification unit, and is also connected to the short-range nitrification unit;

[0011] The sludge separation unit is configured to separate granular sludge smaller than a preset size into a sludge upflow regeneration device, and the sludge upflow regeneration device is configured to crush granular sludge smaller than a preset size and form granular sludge not smaller than a preset size, which is transported to the short-range nitrification unit.

[0012] In some embodiments, the sludge upflow regeneration device comprises:

[0013] A container, wherein a third water inlet is provided at the lower part of the container, and the third water inlet is connected to the sludge separation unit to receive granular sludge smaller than a preset size; a first water inlet and a second water inlet are provided at the bottom of the container, and the first water inlet and the second water inlet are connected to the clarification unit to receive water flow from the clarification unit; an air outlet is provided at the top of the container; a first mud discharge port is provided at the lower part of the container, and the first mud discharge port is connected to the short-range nitrification unit; a first water outlet is provided at the upper part of the container, and the first water outlet is connected to the short-range nitrification unit;

[0014] A flow guide pipe is provided inside the container, a spiral guide plate is provided at the lower part of the flow guide pipe, a sawtooth structure is provided at the upper part of the flow guide pipe, and a first water inlet and a second water inlet are respectively located at opposite sides of the flow guide pipe;

[0015] A connecting piece, the top end of which is connected to the guide pipe, and an extending direction of the connecting piece forms an angle with a horizontal plane;

[0016] A swirl baffle, the swirl baffle is connected to the bottom end of the connecting piece, and an extending direction of the swirl baffle forms a first angle with a horizontal plane;

[0017] The mud receiving plate has its bottom end connected to the inner wall of the container, an extension direction of the mud receiving plate has a second angle with the horizontal plane, the mud receiving plate is located below the swirl baffle, and the first mud discharge port is located between the swirl baffle and the mud receiving plate.

[0018] In some embodiments, the first angle is 30°-50°;

[0019] And / or, the second angle is 20°-30°.

[0020] In some embodiments, the clarification unit includes a water outlet tank, a second water outlet is provided at the upper portion of the water outlet tank, and the second water outlet is connected to the reactor outlet pipe;

[0021] A third water outlet is provided at the lower part of the water outlet pool, and the third water outlet is connected to the first reflux regulating valve, and the first reflux regulating valve is connected to the short-range denitrification unit; the third water outlet is connected to the second reflux regulating valve, and the second reflux regulating valve is connected to the anaerobic ammonia oxidation unit; the third water outlet is connected to the third reflux regulating valve, and the third reflux regulating valve is connected to the first water inlet and the second water inlet.

[0022] In some embodiments, the pool comprises;

[0023] An outlet weir plate, the outlet weir plate and the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, the top of the outlet weir plate is lower than the second outlet;

[0024] A buffer plate is arranged between the outlet weir plate and the second water outlet, the top of the buffer plate is connected to the inner top wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, and the bottom of the buffer plate is spaced from the outlet weir plate;

[0025] The folding baffle includes a first baffle section and a second baffle section, one end of the first baffle section is inserted in the second water outlet, the other end of the first baffle section is connected to the top of the second baffle section, the bottom of the second baffle section is spaced apart from the water outlet weir plate, the bottom of the second baffle section is higher than the bottom of the buffer plate, and the extension directions of the first baffle section and the second baffle section have an angle.

[0026] In some embodiments, the sludge separation unit comprises a plurality of three-phase separators a plurality of cyclone separators;

[0027] A plurality of three-phase separators are arranged at intervals, and the three-phase separators are configured to settle the granular sludge in the short-range nitrification unit, the water phase flows into the anaerobic ammonium oxidation unit, and the air-water mixture carries the granular sludge and the flocculent sludge into the cyclone separator;

[0028] A plurality of cyclone separators are connected to a plurality of three-phase separators in a one-to-one correspondence, the cyclone separators are located at the upper part of the three-phase separators, the feed port of the cyclone separators is connected to the three-phase separators, the underflow port of the cyclone separators is connected to the anaerobic ammonium oxidation unit, the overflow port of the cyclone separators is connected to the sludge upflow regeneration device, and the cyclone separators are configured to return granular sludge greater than or equal to a preset size to the anaerobic ammonium oxidation unit through the underflow port, and to return granular sludge smaller than the preset size to the sludge upflow regeneration device through the overflow port.

[0029] In some embodiments, the three-phase separator includes an air-water riser, a first partition baffle, a second partition baffle, a first gas collecting wall plate, and a second gas collecting wall plate, wherein the first gas collecting wall plate and the second gas collecting wall plate are respectively located on opposite sides of the air-water riser and are both connected to the bottom of the air-water riser;

[0030] Along the extension direction, the length of the first gas collecting wall plate is greater than that of the second gas collecting wall plate, the first gas collecting wall plates and the second gas collecting wall plates in the multiple three-phase separators are arranged alternately, and the projections of adjacent first gas collecting wall plates and second gas collecting wall plates toward the horizontal plane partially overlap, the top of the first partition baffle is connected to the bottom of the first gas collecting wall plate, and the top of the second partition baffle is connected to the bottom of the second gas collecting wall plate to form an anaerobic ammonia oxidation unit and a short-range nitrification unit, the upper parts of the first gas collecting wall plate and the second gas collecting wall plate are located in the anaerobic ammonia oxidation unit, and the lower parts of the first gas collecting wall plate and the second gas collecting wall plate as well as the first partition baffle and the second partition baffle are located in the short-range nitrification unit.

[0031] In some embodiments, the overlapping distance of the projections of adjacent first gas collecting wall panels and second gas collecting wall panels toward the horizontal plane is 5-8 cm.

[0032] In some embodiments, an aeration device is further included, and the aeration device is arranged at the bottom of the short-cut nitrification-anaerobic ammonium oxidation main reactor;

[0033] The aeration device is configured to aerate the short-cut nitrification-anaerobic ammonium oxidation main reactor so that the fluid volume in the gas-water riser of the three-phase separator is 5-10 times the aeration volume.

[0034] In some embodiments, the short-cut denitrification unit comprises:

[0035] An annular baffle, the outer wall of the annular baffle is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, a first through hole penetrating along the axial direction is provided in the middle area of ​​the annular baffle, and a plurality of first carbon source injection ports are provided on the annular baffle, and the plurality of carbon source injection ports are arranged at intervals around the circumference of the annular baffle;

[0036] The lower screen is arranged below the annular baffle, and there is a distance between the lower screen and the annular baffle, so that the outer wall of the lower screen is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor;

[0037] A vertical baffle, the vertical baffle is connected to the top of the lower screen, a second through hole penetrating along the axial direction is arranged in the middle area of ​​the vertical baffle; a spacing is provided between the top of the vertical baffle and the bottom of the annular baffle to form a circulation port;

[0038] An upper screen, wherein the upper screen cover is arranged on the top of the first through hole, and the upper screen is connected to the annular baffle;

[0039] The outer wall of the vertical baffle, the top wall of the lower screen, the bottom wall of the upper screen and the inner wall of the short-range nitrification-anaerobic ammonia oxidation main reactor form a first inner cavity, the second through hole is connected to the first through hole, the inner wall of the second through hole, the inner wall of the first through hole, the top wall of the lower screen and the bottom wall of the upper screen form a second inner cavity; the first carbon source injection port is connected to the first inner cavity; the circulation port is connected to the first inner cavity and the second inner cavity;

[0040] A carbon source adding tube, the carbon source adding tube is wound around the top of the annular baffle, a plurality of second carbon source injection ports are arranged at the bottom of the carbon source adding tube, and the plurality of second carbon source injection ports are arranged one-to-one correspondingly to the plurality of first carbon source injection ports;

[0041] The carbon source batching device is connected to the carbon source adding pipe and the first reflux regulating valve.

[0042] In a second aspect, the present application provides a continuous integrated short-cut nitrification-anaerobic ammonium oxidation method, which is used in the above-mentioned continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, comprising:

[0043] Inoculate the granular sludge into the short-cut nitrification unit;

[0044] The water inlet device discharges the sewage into the short-range nitrification unit for short-range nitrification reaction;

[0045] The sludge separation unit separates the granular sludge smaller than the preset size into the sludge upflow regeneration device, a part of the granular sludge not smaller than the preset size settles in the short-range nitrification unit, and a part of the granular sludge not smaller than the preset size enters the anaerobic ammonium oxidation unit; the sewage enters the anaerobic ammonium oxidation unit to undergo anaerobic ammonium oxidation reaction;

[0046] The sewage enters the short-cut denitrification unit and undergoes short-cut denitrification reaction;

[0047] The sewage enters the clarification unit, part of the effluent from the clarification unit flows into the outside of a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, part of the effluent from the clarification unit flows into the sludge upflow regeneration device, part of the effluent from the clarification unit flows into the anaerobic ammonium oxidation unit, and part of the effluent from the clarification unit is used to dilute the carbon source and enter the short-cut denitrification unit;

[0048] The sludge upflow regeneration device breaks up the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, which is transported to the short-range nitrification unit.

[0049] The present application provides a continuous integrated short-range nitrification-anaerobic ammonium oxidation system and method. A continuous integrated short-range nitrification-anaerobic ammonium oxidation system includes a water inlet device, a short-range nitrification-anaerobic ammonium oxidation main reactor and a sludge upflow regeneration device. The short-range nitrification-anaerobic ammonium oxidation main reactor is connected to the water inlet device. A clarification unit, a short-range denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a short-range nitrification unit are arranged in the short-range nitrification-anaerobic ammonium oxidation main reactor. Sludge upflow regeneration device. It is connected to the sludge separation unit and the clarification unit, and is also connected to the short-range nitrification unit. The sludge separation unit separates granular sludge smaller than a preset size into the sludge upflow regeneration device. The sludge upflow regeneration device crushes the granular sludge smaller than the preset size, and forms granular sludge not smaller than the preset size, which is transported to the short-range nitrification unit. In this way, the granular sludge can be screened and reused, the granular sludge regeneration is promoted, and the short-range denitrification process is coupled to achieve long-term stable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0051] Figure 1 A schematic diagram of the structure of a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0052] Figure 2 A schematic diagram of the structure of a sludge separation unit in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0053] Figure 3 A schematic diagram of the structure of a short-cut denitrification unit in a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0054] Figure 4 A schematic diagram of the structure of an annular plate and a carbon source addition tube in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0055] Figure 5 A schematic diagram of the partial structure of a clarification unit in a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0056] Figure 6 A schematic diagram of the structure of a sludge upflow regeneration device in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application;

[0057] Figure 7 A schematic flow chart of a continuous integrated short-range nitrification-anaerobic ammonium oxidation method provided in an embodiment of the present application.

[0058] Description of reference numerals:

[0059] 100-water inlet device; 110-raw water tank; 120-raw water pump; 130-reactor water inlet pipe; 140-outlet return pipe; 150-outlet return pipe valve;

[0060] 200-short-cut nitrification-anaerobic ammonium oxidation main reactor; 210-reactor outlet pipe; 220-outlet valve; 230-aeration device; 240-fourth water inlet; 250-mud inlet; 260-second mud outlet; 270-fifth water inlet; 280-reactor reflux pipe; 290-reactor reflux pump;

[0061] 300-clarification unit; 310-second water outlet; 320-third water outlet; 330-first reflux regulating valve; 340-second reflux regulating valve; 350-third reflux regulating valve; 360-outlet weir plate; 370-buffer plate; 380-folding baffle plate;

[0062] 400-short-range denitrification unit; 410-annular baffle; 420-first inner cavity; 430-second inner cavity; 440-circulation port; 450-upper screen; 460-lower screen; 470-carbon source addition pipe; 471-carbon source injection port; 480-carbon source batching device;

[0063] 500-anaerobic ammonium oxidation unit;

[0064] 600-sludge separation unit; 610-three-phase separator; 611-gas-water riser; 612-first partition baffle; 613-second partition baffle; 614-first gas collecting wall plate; 615-second gas collecting wall plate; 620-cyclone separator; 621-feed port; 622-bottom flow port; 623-overflow port; 624-cyclone separator overflow pipe;

[0065] 700-short-range nitrification unit;

[0066] 800-sludge upflow regeneration device; 810-third water inlet; 820-first water inlet; 830-second water inlet; 840-air outlet; 850-first mud outlet; 860-first water outlet; 870-flow guide pipe; 880-spiral guide plate; 890-connecting piece; 8100-swirl baffle; 8110-mud receiving plate; 8120-sawtooth structure. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0068] In the related technologies, the integrated short-range nitrification-anaerobic ammonium oxidation requires strict control of aeration. Due to the coexistence of multiple microbial populations, the formation, stabilization and regeneration of anaerobic ammonium oxidation granular sludge are difficult and are easily affected by load shocks, resulting in system instability.

[0069] In order to overcome the defects in the prior art, the present application provides a continuous integrated short-range nitrification-anaerobic ammonium oxidation system and method, a continuous integrated short-range nitrification-anaerobic ammonium oxidation system including a water inlet device, a short-range nitrification-anaerobic ammonium oxidation main reactor and a sludge upflow regeneration device. The short-range nitrification-anaerobic ammonium oxidation main reactor is connected to the water inlet device. A clarification unit, a short-range denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a short-range nitrification unit are arranged in the short-range nitrification-anaerobic ammonium oxidation main reactor. Sludge upflow regeneration device. It is connected to the sludge separation unit and the clarification unit, and is also connected to the short-range nitrification unit. The sludge separation unit separates granular sludge smaller than a preset size into the sludge upflow regeneration device. The sludge upflow regeneration device crushes the granular sludge smaller than the preset size, and forms granular sludge not smaller than the preset size, which is transported to the short-range nitrification unit. In this way, the granular sludge can be screened and reused to promote the regeneration of the granular sludge, and coupled with the short-range denitrification process, the long-term stable operation of the device can be achieved.

[0070] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0071] Figure 1 A schematic diagram of the structure of a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application.

[0072] See also Figure 1 As shown, the present application provides a continuous integrated short-range nitrification-anaerobic ammonium oxidation system, including a water inlet device 100.

[0073] In some embodiments, a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system includes a short-cut nitrification-anaerobic ammonium oxidation main reactor 200 .

[0074] The short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is connected to the water inlet device 100 .

[0075] The short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is provided with a clarification unit 300 , a short-cut denitrification unit 400 , an anaerobic ammonium oxidation unit 500 , a sludge separation unit 600 and a short-cut nitrification unit 700 .

[0076] In some embodiments, a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system includes a sludge upflow regeneration device 800 .

[0077] The sludge upflow regeneration device 800 is connected to the sludge separation unit 600 and the clarification unit 300 , and is also connected to the short-range nitrification unit 700 .

[0078] The water inlet device 100 is configured to inject sewage into the short-cut nitrification-anaerobic ammonium oxidation main reactor 200, and is used to receive part of the sewage discharged from the short-cut nitrification-anaerobic ammonium oxidation main reactor 200.

[0079] The short-range nitrification unit 700 can (Ammonium cation) is oxidized to (nitrite ion).

[0080] The anaerobic ammonium oxidation unit 500 can perform anaerobic ammonium oxidation reaction to convert the wastewater into and The reaction is carried out simultaneously (nitrate ion) and (Nitrogen).

[0081] The short-range denitrification unit 400 can convert a small amount of Short-term denitrification reaction , and then enters the anaerobic ammonium oxidation unit 500 through the clarification unit 300 to provide a substrate for the anaerobic ammonium oxidation reaction.

[0082] The clarification unit 300 can adjust the water output and control the water quality of the output water.

[0083] The sludge separation unit 600 is configured to separate granular sludge smaller than a preset size to the sludge upflow regeneration device 800 , and to separate granular sludge not smaller than a preset size to the short-cut nitrification unit 700 and the anaerobic ammonium oxidation unit 500 .

[0084] The sludge upflow regeneration device 800 is configured to crush granular sludge smaller than a preset size and form granular sludge not smaller than a preset size, and transport it to the short-range nitrification unit 700. In this way, the granular sludge can be screened and reused, the granular sludge can be regenerated, and the short-range denitrification process can be coupled to achieve long-term stable operation of the device.

[0085] It should be noted that the preset size can be set according to requirements. For example, the preset size is 1 mm. Or, the preset size is 1.5 mm, etc.

[0086] The specific structure of the water inlet device 100 is described below:

[0087] The water inlet device 100 includes a raw water tank 110 , which can be used to receive external sewage and sewage discharged from the short-range nitrification-anaerobic ammonium oxidation main reactor 200 .

[0088] The water inlet device 100 includes a raw water pump 120 and a reactor water inlet pipe 130 . The reactor water inlet pipe 130 is connected to the raw water tank 110 and is connected to the third water inlet of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 .

[0089] The water inlet device 100 includes a water outlet return pipe 140 and a water outlet return pipe valve 150. The water outlet return pipe 140 is connected to the raw water tank 110. The water outlet return pipe valve 150 controls whether the water outlet return pipe 140 is connected or disconnected with the reactor water outlet pipe 210. The reactor water outlet pipe 210 is connected to the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 and is connected to the water outlet valve 220. The water outlet valve 220 controls whether the reactor water outlet pipe 210 is connected or disconnected with the outside of a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system.

[0090] Figure 2 A schematic diagram of the structure of a sludge separation unit in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application.

[0091] The specific structure of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is described below:

[0092] See also Figure 1 and Figure 2 As shown, the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 has an inner cavity.

[0093] An aeration device 230 is provided at the bottom of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200. The aeration device 230 is used to provide aeration to the inner cavity of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200.

[0094] Specifically, the aeration device 230 includes an air source and a plurality of aeration plates, the plurality of aeration plates are arranged at intervals, and the aeration plates are connected to the air source. The aeration plates are at least partially located in the inner cavity.

[0095] A fourth water inlet 240 is provided at the lower portion of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 , and the fourth water inlet 240 is used to communicate with the water inlet device 100 .

[0096] A mud inlet 250 is provided at the lower part of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 . The mud inlet 250 is used to communicate with the sludge upflow regeneration device 800 . The granular sludge produced by the sludge upflow regeneration device 800 enters the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 through the mud inlet 250 .

[0097] The mud inlet 250 is located above the fourth water inlet 240, which is beneficial for the full contact between sewage and granular sludge.

[0098] A second mud discharge port 260 is provided at the lower part of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200. The second mud discharge port 260 is connected to the outside of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200. Granular sludge can be discharged from the second mud discharge port 260 to the outside of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200, and applied to the bacterial source of the next batch of anaerobic ammonium oxidation reactors, so as to realize the rejuvenation and expansion of granular sludge.

[0099] The second mud discharge port 260 is located above the mud inlet 250. In this way, the granular sludge can be further rejuvenated and expanded after entering the short-cut nitrification-anaerobic ammonium oxidation main reactor 200, and then discharged from the short-cut nitrification-anaerobic ammonium oxidation main reactor 200.

[0100] A fifth water inlet 270 is provided at the lower part of the short-range nitrification-anaerobic ammonium oxidation main reactor 200. The fifth water inlet 270 is used to be connected to the sludge upflow regeneration device 800 to receive the liquid discharged from the sludge upflow regeneration device 800, so as to further process the liquid and improve the purification effect.

[0101] In some embodiments, the sludge separation unit 600 includes a plurality of three-phase separators 610 and a plurality of cyclone separators 620. Specifically, the number of the three-phase separators 610 may be 4 to 8.

[0102] In some embodiments, the distance between the bottom of the three-phase separator 610 and the inner bottom wall of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is one third of the height of the inner cavity of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 .

[0103] Among them, multiple three-phase separators 610 are arranged at intervals, and the three-phase separators 610 are configured to settle the granular sludge in the short-range nitrification unit 700, the water phase flows into the anaerobic ammonium oxidation unit 500, and the air-water mixture carries the granular sludge and floc sludge into the cyclone separator 620 under a large aeration volume.

[0104] The plurality of cyclone separators 620 are connected to the plurality of three-phase separators 610 in a one-to-one correspondence. The cyclone separators 620 are located above the three-phase separators 610.

[0105] The feed port 621 of the cyclone separator 620 is connected to the three-phase separator 610, and the underflow port 622 of the cyclone separator 620 is connected to the anaerobic ammonium oxidation unit 500. The cyclone separator 620 is configured to return the granular sludge greater than or equal to the preset size to the anaerobic ammonium oxidation unit 500 through the underflow port 622, and part of the granular sludge falls into the short-range nitrification unit 700 under the action of gravity.

[0106] The overflow port of the cyclone separator 620 is connected to the sludge upflow regeneration device 800, and the granular sludge smaller than the preset size flows to the sludge upflow regeneration device 800 through the overflow port.

[0107] Exemplarily, the gas-water flows through the three-phase separator 610, the granular sludge settles in the short-range nitrification unit 700, the water phase flows into the anaerobic ammonium oxidation unit 500, and the gas-water mixture carries the granular sludge and flocculent sludge into the cyclone separator 620 under a large aeration volume. The gas-water mixture is separated by the cyclone separator 620, and the granular sludge with a particle size of not less than 1 mm flows back to the anaerobic ammonium oxidation unit 500 at the bottom flow port 622 of the cyclone separator 620, and a small part of the granular sludge passes through the gas collecting wall plate of the three-phase separator 610 and falls into the short-range nitrification unit 700. The flocculent sludge smaller than 1 mm (which cannot be stratified) flows with the water flow from the overflow port 623 to the sludge upflow regeneration device 800 for water flow shearing, crushing and granulation, and the regenerated granular sludge and water enter the short-range nitrification unit 700 again.

[0108] In some embodiments, the three-phase separator 610 includes a gas-water riser 611 , a first partition baffle 612 , a second partition baffle 613 , a first gas collecting wall plate 614 , and a second gas collecting wall plate 615 .

[0109] The first gas collecting wall plate 614 and the second gas collecting wall plate 615 are respectively located on two opposite sides of the gas-water ascending pipe 611 , and are both connected to the bottom of the gas-water ascending pipe 611 .

[0110] Along the extension direction, the length of the first gas collecting wall plate 614 is greater than that of the second gas collecting wall plate 615. The first gas collecting wall plates 614 and the second gas collecting wall plates 615 in the plurality of three-phase separators 610 are arranged alternately, and the projections of the adjacent first gas collecting wall plates 614 and the second gas collecting wall plates 615 toward the horizontal plane partially overlap. The top of the first partition baffle 612 is connected to the bottom of the first gas collecting wall plate 614, and the top of the second partition baffle 613 is connected to the bottom of the second gas collecting wall plate 615. To form the anaerobic ammonium oxidation unit 500 and the short-range nitrification unit 700, the upper parts of the first gas collecting wall plate 614 and the second gas collecting wall plate 615 are located in the anaerobic ammonium oxidation unit 500, and the lower parts of the first gas collecting wall plate 614 and the second gas collecting wall plate 615 and the first partition baffle 612 and the second partition baffle 613 are located in the short-range nitrification unit 700.

[0111] It can be understood that the Venturi effect is formed by setting the first gas collecting wall plate 614, the second gas collecting wall plate 615, the first partition baffle 612 and the second partition baffle 613. This effect is manifested in that when the restricted flow passes through the reduced flow section, the fluid has an increased flow velocity, and its flow velocity is inversely proportional to the flow section. According to Bernoulli's law, the increase in flow velocity is accompanied by a decrease in fluid pressure, which is the common Venturi phenomenon. In layman's terms, this effect refers to the low pressure generated near the high-speed flowing fluid, thereby generating an adsorption effect. Specifically, when the water flows between two adjacent three-phase separators 610, the flow section decreases, the flow velocity increases, and low pressure is generated nearby. It is difficult for the gas to pass through this area into the anaerobic ammonia oxidation unit 500, while the water flow can rise and enter the anaerobic ammonia oxidation unit 500. Therefore, the space from this area to the bottom flow port 622 of the cyclone separator 620 can constitute an anaerobic ammonia oxidation functional area, simplifying the structure of the integrated short-range nitrification-anaerobic ammonia oxidation reactor.

[0112] In some embodiments, by adjusting the aeration amount, the fluid volume in the air-water riser 611 is 5-10 times the aeration amount.

[0113] It is understandable that when the fluid volume in the air-water riser 611 is less than 5 times the aeration volume, the content of granular sludge and flocculent sludge in the air-water riser 611 is relatively small. When the fluid volume in the air-water riser 611 is greater than 10 times the aeration volume, the aeration volume is relatively large, which is easy to affect the activity of granular sludge, and the granular sludge in the short-range nitrification unit 700 is relatively small.

[0114] The area between the lower part of the first gas collecting wall plate 614 and the second gas collecting wall plate 615 of the three-phase separator 610 and the aeration device 230 is the area where the short-range nitrification unit 700 is set. The area between the lower part of the first gas collecting wall plate 614 and the second gas collecting wall plate 615 of the three-phase separator 610 and the short-range denitrification unit 400 is the area where the anaerobic ammonia oxidation unit 500 is set. The lower part of the first gas collecting wall plate 614 and the second gas collecting wall plate 615 is the position shown by the dotted line in the figure.

[0115] In some embodiments, the first gas collecting panel 614 includes a first extension portion, a second extension portion, and a third extension portion connected in sequence. The second gas collecting panel 615 includes a fourth extension portion, a fifth extension portion, and a sixth extension portion connected in sequence.

[0116] The first extension portion and the fourth extension portion are symmetrically arranged with respect to the axial direction of the gas-water ascending pipe 611. The first extension portion and the fourth extension portion have the same length along the extension direction.

[0117] The second extension part and the fifth extension part are symmetrically arranged about the axial direction of the gas-water ascending pipe 611. The extension direction of the second extension part and the fifth extension part is consistent with the axial direction of the gas-water ascending pipe 611. The length of the second extension part and the fifth extension part along the extension direction is consistent.

[0118] The extending directions of the third extension part and the sixth extension part have the same angle with the axial direction of the gas-water ascending pipe 611. The length of the third extension part along the extending direction is greater than the length of the sixth extension part along the extending direction.

[0119] In some embodiments, the length of the third extension portion along the extension direction is three times the length of the sixth extension portion along the extension direction.

[0120] In some embodiments, the overlapping distance of the projections of adjacent first gas collecting wall panels 614 and second gas collecting wall panels 615 toward the horizontal plane is 5-8 cm.

[0121] Specifically, the overlapping distance of the projections of the adjacent third extending portion and the sixth extending portion toward the horizontal plane is 5-8 cm.

[0122] When the overlapping distance of the projections of the adjacent first gas collecting wall plate 614 and the second gas collecting wall plate 615 toward the horizontal plane is less than 5 mm, the flow rate is too fast, which is not conducive to the full reaction of the sewage in the anaerobic ammonium oxidation unit 500.

[0123] When the overlapping distance of the projections of the adjacent first gas collecting wall plate 614 and the second gas collecting wall plate 615 toward the horizontal plane is greater than 8 mm, the flow rate is slow, which is not conducive to the formation of negative pressure in the anaerobic ammonium oxidation unit 500.

[0124] Figure 3 A schematic diagram of the structure of a short-cut denitrification unit in a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application, Figure 4 A schematic diagram of the structure of an annular plate and a carbon source addition tube in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application.

[0125] See also Figure 1 As shown, in some embodiments, the distance between the top of the short-cut denitrification unit 400 and the inner top wall of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is one third of the height of the inner cavity of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 .

[0126] See also Figure 3 and Figure 4 As shown, in some embodiments, the short-cut denitrification unit 400 includes an annular baffle 410 .

[0127] The outer wall of the annular baffle 410 is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 , and a first through hole penetrating along the axial direction is provided in the middle area of ​​the annular baffle 410 .

[0128] Specifically, the annular baffle 410 is in a flat plate shape and a pancake shape. A hole is punched in the middle area of ​​the annular baffle 410 to form a first through hole. The axis of the first through hole is colinear with the axis of the annular baffle 410 .

[0129] The annular baffle 410 is provided with a plurality of first carbon source injection ports 411, which are arranged at intervals around the circumference of the annular baffle 410. The first carbon source injection ports 411 are through holes, which are arranged at the top of the annular baffle 410.

[0130] The short-cut denitrification unit 400 includes a lower screen 460 .

[0131] The lower screen 460 is disposed below the annular baffle 410 , and there is a distance between the lower screen 460 and the annular baffle 410 . The outer wall of the lower screen 460 is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 .

[0132] The short-cut denitrification unit 400 includes a vertical baffle 490 .

[0133] The vertical baffle 490 is connected to the top of the lower screen 460 , and a second through hole penetrating along the axial direction is provided in the middle area of ​​the vertical baffle 490 .

[0134] Specifically, the vertical baffle 490 is cylindrical, and a hole is punched in the middle area of ​​the vertical baffle 490 to form a second through hole, and the axis of the second through hole is colinear with the axis of the vertical baffle 490 .

[0135] A top of the vertical baffle 490 is spaced from a bottom of the annular baffle 410 to form a circulation port 440 .

[0136] The short-cut denitrification unit 400 includes an upper screen 450 .

[0137] The upper screen 450 is covered on the top of the first through hole, and the upper screen 450 is connected to the annular baffle 410 .

[0138] The outer wall of the vertical baffle 490, the top wall of the lower screen 460, the bottom wall of the upper screen 450 and the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 form a first inner cavity 420, the second through hole is connected to the first through hole, and the inner wall of the second through hole, the inner wall of the first through hole, the top wall of the lower screen 460 and the bottom wall of the upper screen 450 form a second inner cavity 430. The first carbon source injection port 411 is connected to the first inner cavity 420. The circulation port 440 connects the first inner cavity 420 and the second inner cavity 430.

[0139] The short-cut denitrification unit 400 includes a carbon source adding pipe 470 .

[0140] The carbon source adding pipe 470 is wound around the top of the annular baffle 410, and a plurality of second carbon source injection ports 471 are arranged at the bottom of the carbon source adding pipe 470, and the plurality of second carbon source injection ports 471 are arranged one-to-one correspondingly to the plurality of first carbon source injection ports 411. The second carbon source injection ports 471 are connected to the corresponding first carbon source injection ports 411.

[0141] The short-cut denitrification unit 400 includes a carbon source batching device 480 .

[0142] The carbon source dosing device 480 is in communication with the carbon source adding pipe 470 , and is also in communication with the first reflux regulating valve 330 .

[0143] The first inner cavity 420 and the second inner cavity 430 are filled with fillers.

[0144] It should be noted that the filler is divided into three layers, the upper and lower layers are sponges, and the middle layer is one or more of polypropylene PP microspheres, polyethylene HDPE microspheres, and polycarbonate PC microspheres. The filler is inoculated with short-range denitrification sludge.

[0145] In some embodiments, the apertures of the upper mesh 450 and the lower mesh 460 are 15-25 mm.

[0146] It is understandable that the carbon source injection port 471 can distribute the carbon source mixture to the packing layer in the first inner cavity 420, and flow back to the packing layer in the second inner cavity 430 under the action of the rising water flow, and cannot flow down to the anaerobic ammonia oxidation unit 500. As the carbon source mixture is sprayed downward, a pressure difference is generated at the circulation port 440, which can make the carbon source in the second inner cavity 430 flow back to the packing layer in the first inner cavity 420 through the circulation port 440, achieving effective circulation in the packing layer and improving the utilization rate of the carbon source.

[0147] Short-cut denitrification unit 400 can remove excess , backfill Used in the anaerobic ammonium oxidation unit 500 below. The carbon source is evenly dispersed in the packing layer under the action of the hydrocyclone, which is suitable for the denitrification process.

[0148] In some embodiments, along the radial direction of the annular baffle 410 , the distance between the inner walls of the first inner cavity 420 is smaller than the inner diameter of the second inner cavity 430 . Specifically, the distance between the inner walls of the first inner cavity 420 is half the radius of the second inner cavity 430 .

[0149] Figure 5 A schematic diagram of the partial structure of a clarification unit in a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application.

[0150] In some embodiments, clarification unit 300 includes an outlet tank.

[0151] The distance between the bottom of the effluent pool and the inner top wall of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is one fifth of the height of the inner cavity of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 .

[0152] See also Figure 5 As shown, in some embodiments, a second water outlet 310 is disposed at the upper portion of the water outlet pool, and the second water outlet 310 is connected to the reactor water outlet pipe 210 .

[0153] A third water outlet 320 is provided at the lower part of the water outlet pool. The third water outlet 320 is communicated with the first reflux regulating valve 330 , and the first reflux regulating valve 330 is communicated with the short-range denitrification unit 400 .

[0154] Specifically, the first reflux regulating valve 330 is in communication with the carbon source dosing device 480 .

[0155] The third water outlet 320 is communicated with the second reflux regulating valve 340 , and the second reflux regulating valve 340 is communicated with the anaerobic ammonium oxidation unit 500 .

[0156] The third water outlet 320 is communicated with the third reflux regulating valve 350 , and the third reflux regulating valve 350 is communicated with the first water inlet and the second water inlet.

[0157] It is understandable that the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 detects the anaerobic ammonium oxidation zone The concentration of nitrification and anaerobic ammonia oxidation can be adjusted in time to control the return water flow rate. When the concentration is too low, the return water can increase the flow rate into the anaerobic ammonium oxidation unit 500, which can improve the start-up efficiency of the integrated short-range nitrification and anaerobic ammonium oxidation reaction.

[0158] Specifically, the design of the outlet pool can slow down the water outlet rate, allowing the water to flow back to the short-range nitrification-anaerobic ammonia oxidation main reactor 200 first, and the return water volume of each waterway can be adjusted through the first return regulating valve 330, the second return regulating valve 340, and the third return regulating valve 350 to control the water quality of the outlet water.

[0159] In some embodiments, the pool includes an outlet weir 360 .

[0160] The outlet weir plate 360 ​​is connected to the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 , and the top of the outlet weir plate 360 ​​is lower than the second water outlet 310 .

[0161] Specifically, the outlet weir plate 360 ​​includes an outlet weir wall plate and an outlet weir bottom plate connected to each other. The outlet weir wall plate is arranged vertically, and the outlet weir bottom plate is arranged horizontally. The outlet weir wall plate is 3 to 5 cm below the second water outlet 310.

[0162] Among them, a buffer plate 370 is arranged between the outlet weir plate 360 ​​and the second water outlet 310 , the top of the buffer plate 370 is connected to the inner top wall of the short-range nitrification-anaerobic ammonia oxidation main reactor 200 , and the bottom of the buffer plate 370 is spaced from the outlet weir plate 360 ​​.

[0163] Specifically, a buffer plate 370 is provided on one side of the outlet weir wall plate facing the second water outlet 310 .

[0164] In some embodiments, the pool includes a folding baffle 380.

[0165] The folding baffle 380 includes a first baffle section and a second baffle section, one end of the first baffle section is inserted in the second water outlet 310, the other end of the first baffle section is connected to the top of the second baffle section, the bottom of the second baffle section is spaced apart from the water outlet weir 360, and the extension directions of the first baffle section and the second baffle section have an angle.

[0166] Specifically, the first baffle section is arranged horizontally, and the second baffle section is arranged vertically. The bottom end of the second baffle section is higher than the bottom end of the buffer plate 370. The bottom end of the second baffle section is higher than the bottom end of the buffer plate 370 by 5 to 10 cm.

[0167] Figure 6 A schematic diagram of the structure of a sludge upflow regeneration device in a continuous integrated short-range nitrification-anaerobic ammonium oxidation system provided in an embodiment of the present application.

[0168] The specific structure of the sludge upflow regeneration device 800 is described below:

[0169] See also Figure 6 As shown, in some embodiments, the sludge upflow regeneration device 800 includes a container.

[0170] The lower part of the container is provided with a third water inlet 810 , which is connected to the sludge separation unit 600 to receive granular sludge smaller than a preset size. Specifically, the overflow port 623 of the cyclone separator 620 is connected to the third water inlet 810 through the cyclone separator overflow pipe 624 .

[0171] A first water inlet 820 and a second water inlet 830 are disposed at the bottom of the container, and the first water inlet and the second water inlet are communicated with the clarification unit 300 to receive the water flow of the clarification unit 300 .

[0172] Specifically, the first water inlet 820 and the second water inlet 830 are connected to the reactor reflux pipe 280 through the third reflux regulating valve 350. The reactor reflux pipe 280 is connected to the reactor reflux pump 290, and the reactor reflux pump 290 is connected to the third water outlet 320.

[0173] An air outlet 840 is provided at the top of the container.

[0174] A first mud discharge port 850 is provided at the lower portion of the container, and the first mud discharge port 850 is communicated with the short-range nitrification unit 700 .

[0175] A first water outlet 860 is provided at the upper portion of the container, and the first water outlet 860 is connected to the short-range nitrification unit 700 .

[0176] Specifically, the first water outlet 860 is located above the first mud outlet 850 . The fourth water inlet 240 is located below the first mud outlet 850 .

[0177] The sludge upflow regeneration device 800 includes a flow guide pipe 870 .

[0178] A guide pipe 870 is provided inside the container, a spiral guide plate 880 is provided at the lower part of the guide pipe 870, a sawtooth structure 8120 is provided at the upper part of the guide pipe 870, and the first water inlet 820 and the second water inlet 830 are respectively located on opposite sides of the guide pipe 870.

[0179] Specifically, the position of the spiral guide plate 880 is limited to one quarter of the height of the guide tube 870 .

[0180] The sludge upflow regeneration device 800 includes a connecting piece 890 .

[0181] The top end of the connecting member 890 is connected to the guide tube 870 , and the extending direction of the connecting member 890 forms an angle with the horizontal plane.

[0182] The sludge upflow regeneration device 800 includes a cyclone baffle 8100 .

[0183] The swirl baffle 8100 is connected to the bottom end of the connecting piece, and an extending direction of the swirl baffle 8100 forms a first angle with a horizontal plane.

[0184] Specifically, the distance from the bottom of the swirl baffle 8100 to the bottom of the container is one third of the height of the container.

[0185] The sludge upflow regeneration device 800 includes a sludge receiving plate 8110 .

[0186] Among them, the bottom end of the mud receiving plate 8110 is connected to the inner wall of the container, the extension direction of the mud receiving plate 8110 has a second angle with the horizontal plane, the mud receiving plate 8110 is located below the swirl baffle 8100, and the first mud discharge port 850 is located between the swirl baffle 8100 and the mud receiving plate 8110.

[0187] In some embodiments, the first angle is 30°-50°.

[0188] In some embodiments, the second angle is 20°-30°.

[0189] When the second angle is less than 20°, the inclination angle of the mud receiving plate 8110 is small, and the granular sludge is not easy to slide to the first mud discharge port 850. Moreover, the mud receiving plate 8110 has poor effects in increasing the tangential flow rate and circulation of water and increasing the swirl. The shear force of the water flow can crush the flocculent sludge, promote the regeneration of granular sludge, replenish the integrated short-range nitrification and anaerobic ammonia oxidation reaction device, and solve the process instability caused by the floating loss of flocculent sludge.

[0190] It can be understood that the water flow of the first water inlet 820 and the second water inlet 830 forms a two-way counter-flow water inlet, and then forms two spiral upward fluids near the guide tube 870 through the spiral guide plate 880. The bubbles and mud-water wrapping layers of the flocculent sludge are cut by the numerous sawtooth structures 8120, and the air, mud and wrapped water can be separated. After the rising mud and water flow is obliquely cut by the swirl baffle 8100, part of the water forms a backflow, and part of the water passes through the gap between the upper end of the swirl baffle 8100 and the guide tube 870, and the speed increases. The water flow refluxes at the upper part of the sludge upflow regeneration device 800, passes through the gap between the lower end of the swirl baffle 8100 and the mud receiving plate 8110, and forms a swirl in the area below the mud receiving plate 8110 and the swirl baffle 8100, thereby enhancing mass transfer, strengthening the interphase mixing of mud and water, and making the broken sludge particles bond into balls.

[0191] The orientation of the swirl baffle 8100 and the mud receiving plate 8110 can increase the water tangential flow velocity and circulation, increase the swirl, break up low-density particles, and promote the adhesion of small sludge particles into balls under the shear force of the water flow, thereby strengthening the regeneration of granular sludge.

[0192] It should be noted that after the granular sludge in the main reactor is rejuvenated, it can be output and applied to other anaerobic ammonium oxidation reactors.

[0193] Figure 7 A schematic flow chart of a continuous integrated short-range nitrification-anaerobic ammonium oxidation method provided in an embodiment of the present application.

[0194] See also Figure 7As shown, the present application provides a continuous integrated short-cut nitrification-anaerobic ammonium oxidation method, which is used for the above-mentioned continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, comprising:

[0195] S101. Inoculate the granular sludge into the short-cut nitrification unit.

[0196] S102: The water inlet device discharges the sewage into the short-range nitrification unit to carry out a short-range nitrification reaction.

[0197] S103, the sludge separation unit separates the granular sludge smaller than the preset size into the sludge upflow regeneration device, and the sewage enters the anaerobic ammonium oxidation unit for anaerobic ammonium oxidation reaction.

[0198] S104. The sewage enters the short-cut denitrification unit to undergo a short-cut denitrification reaction.

[0199] S105. The sewage enters the clarification unit, part of the effluent from the clarification unit flows into the outside of a continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, part of the effluent from the clarification unit flows into the sludge upflow regeneration device, part of the granular sludge not less than a preset size settles in the short-cut nitrification unit, and part of the granular sludge not less than a preset size enters the anaerobic ammonium oxidation unit; part of the effluent from the clarification unit flows into the anaerobic ammonium oxidation unit, and part of the effluent from the clarification unit is used to dilute the carbon source and enter the short-cut denitrification unit.

[0200] S106. The sludge upflow regeneration device breaks up the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, which is transported to the short-range nitrification unit.

[0201] The working process of a continuous integrated short-range nitrification-anaerobic ammonium oxidation method is described below.

[0202] The integrated anaerobic ammonium oxidation granular sludge is inoculated into the interior of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200, and the sludge inoculation amount is 2% to 3%. The outlet valve 220 is closed, and the outlet return pipe valve 150 is opened. The short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is opened for water inlet and aeration. The dissolved oxygen in the short-cut nitrification unit 700 is controlled at 0.2 to 0.5 mg / L through aeration. The wastewater first enters the short-cut nitrification unit 700 for short-cut nitrification reaction, and half of the Oxidized to nitrite The wastewater then enters the anaerobic ammonium oxidation unit 500 for anaerobic ammonium oxidation reaction. and The reaction is carried out simultaneously and The reactor is maintained to carry out the integrated short-cut nitrification-anaerobic ammonium oxidation reaction for 3 to 5 hours, and the granular sludge is evenly distributed in the short-cut nitrification unit 700 and the anaerobic ammonium oxidation unit 500. At this time, the effluent of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 flows back into the raw water tank 110.

[0203] In the reactor The short-cut denitrification reaction is converted into , and then enters the anaerobic ammonium oxidation unit 500 through the second reflux regulating valve 340 to provide a substrate for the anaerobic ammonium oxidation reaction.

[0204] After running for 1 to 2 hours, close the outlet return pipe valve 150, open the outlet valve 220, and keep the water inlet of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 open. Through the first reflux regulating valve 330, the second reflux regulating valve 340 and the third reflux regulating valve 350, the ratio of the return water and the outlet water of the short-range nitrification-anaerobic ammonium oxidation main reactor 200 is controlled to be 4-6:1, and the short-range nitrification-anaerobic ammonium oxidation main reactor 200 has normal water inlet and outlet.

[0205] The granular sludge that is continuously growing in the short-range nitrification-anaerobic ammonium oxidation main reactor 200 is regularly discharged from the second sludge discharge port 260 and used as the bacterial source for the next batch of anaerobic ammonium oxidation reactors, thereby achieving rejuvenation and expansion of the granular sludge.

[0206] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0207] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0208] It should be easily understood that the terms “on,” “above,” and “over” in this application should be interpreted in the broadest manner, so that “on” means not only “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above something” or “over,” but also may include the meaning of “above something” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0209] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90° or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0210] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0211] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0212] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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 application.

[0213] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0214] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0215] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, characterized in that: include: Water inlet device; The short-cut nitrification-anaerobic ammonium oxidation main reactor is connected to the water inlet device; the short-cut nitrification-anaerobic ammonium oxidation main reactor is provided with a clarification unit, a short-cut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a short-cut nitrification unit; A sludge upflow regeneration device, which is connected to the sludge separation unit, the clarification unit and the short-range nitrification unit; The sludge separation unit is configured to separate granular sludge smaller than a preset size to the sludge upflow regeneration device, and the sludge upflow regeneration device is configured to crush the granular sludge smaller than the preset size and form granular sludge not smaller than the preset size, and transport it to the short-range nitrification unit.

2. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 1, characterized in that: The sludge upflow regeneration device comprises: A container, wherein a third water inlet is provided at the lower part of the container, and the third water inlet is communicated with the sludge separation unit to receive the granular sludge smaller than a preset size; a first water inlet and a second water inlet are provided at the bottom of the container, and the first water inlet and the second water inlet are communicated with the clarification unit to receive the water flow of the clarification unit; an air outlet is provided at the top of the container; a first mud discharge port is provided at the lower part of the container, and the first mud discharge port is communicated with the short-range nitrification unit; a first water outlet is provided at the upper part of the container, and the first water outlet is communicated with the short-range nitrification unit; A flow guide pipe, wherein the container is provided with a flow guide pipe, a spiral guide plate is provided at the lower part of the flow guide pipe, a sawtooth structure is provided at the upper part of the flow guide pipe, and the first water inlet and the second water inlet are respectively located at opposite sides of the flow guide pipe; A connecting piece, the top end of which is connected to the flow guide pipe, and an extending direction of the connecting piece forms an angle with a horizontal plane; A swirl baffle, the swirl baffle is connected to the bottom end of the connecting member, and an extending direction of the swirl baffle forms a first angle with a horizontal plane; A mud receiving plate, wherein the bottom end of the mud receiving plate is connected to the inner wall of the container, the extension direction of the mud receiving plate has a second angle with the horizontal plane, the mud receiving plate is located below the swirl baffle, and the first mud discharge port is located between the swirl baffle and the mud receiving plate.

3. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 2, characterized in that: The first angle is 30°-50°; And / or, the second angle is 20°-30°.

4. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 2, characterized in that: The clarification unit comprises a water outlet tank, the upper part of which is provided with a second water outlet, and the second water outlet is connected to the reactor water outlet pipe; A third water outlet is provided at the lower part of the water outlet pool, and the third water outlet is connected to the first reflux regulating valve, and the first reflux regulating valve is connected to the short-range denitrification unit; the third water outlet is connected to the second reflux regulating valve, and the second reflux regulating valve is connected to the anaerobic ammonia oxidation unit; the third water outlet is connected to the third reflux regulating valve, and the third reflux regulating valve is connected to the first water inlet and the second water inlet.

5. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 4, characterized in that: The pool comprises: an outlet weir plate, the outlet weir plate and the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, and the top of the outlet weir plate is lower than the second water outlet; A buffer plate is provided between the outlet weir plate and the second water outlet, the top of the buffer plate is connected to the inner top wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, and the bottom of the buffer plate is spaced apart from the outlet weir plate; A folding baffle, the folding baffle includes a first baffle section and a second baffle section, one end of the first baffle section is inserted in the second water outlet, the other end of the first baffle section is connected to the top of the second baffle section, the bottom of the second baffle section is spaced apart from the water outlet weir plate, the bottom of the second baffle section is higher than the bottom of the buffer plate, and the extension directions of the first baffle section and the second baffle section have an angle.

6. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to any one of claims 1 to 5, characterized in that: The sludge separation unit includes a plurality of three-phase separators and a plurality of cyclone separators; A plurality of the three-phase separators are arranged at intervals, and the three-phase separators are configured to settle the granular sludge in the short-range nitrification unit, the water phase flows into the anaerobic ammonium oxidation unit, and the gas-water mixture carries the granular sludge and the flocculent sludge into the cyclone separator; The plurality of cyclone separators are connected to the plurality of three-phase separators in a one-to-one correspondence, the cyclone separators are located at the upper part of the three-phase separators, the feed port of the cyclone separators is connected to the three-phase separators, the underflow port of the cyclone separators is connected to the anaerobic ammonia oxidation unit, the overflow port of the cyclone separators is connected to the sludge upflow regeneration device, and the cyclone separators are configured to return granular sludge greater than or equal to the preset size to the anaerobic ammonia oxidation unit through the underflow port, and to return granular sludge smaller than the preset size to the sludge upflow regeneration device through the overflow port.

7. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 6, characterized in that: The three-phase separator includes an air-water riser, a first partition baffle, a second partition baffle, a first gas collecting wall plate and a second gas collecting wall plate, wherein the first gas collecting wall plate and the second gas collecting wall plate are respectively located on opposite sides of the air-water riser and are both connected to the bottom of the air-water riser; Along the extension direction, the length of the first gas collecting wall plate is greater than that of the second gas collecting wall plate, the first gas collecting wall plates and the second gas collecting wall plates in the multiple three-phase separators are arranged alternately, and the projections of the adjacent first gas collecting wall plates and the second gas collecting wall plates toward the horizontal plane partially overlap, the top of the first partition baffle is connected to the bottom of the first gas collecting wall plate, and the top of the second partition baffle is connected to the bottom of the second gas collecting wall plate to form the anaerobic ammonia oxidation unit and the short-range nitrification unit, the upper parts of the first gas collecting wall plate and the second gas collecting wall plate are located in the anaerobic ammonia oxidation unit, and the lower parts of the first gas collecting wall plate and the second gas collecting wall plate as well as the first partition baffle and the second partition baffle are located in the short-range nitrification unit.

8. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 7, characterized in that: The overlapping distance of the projections of the adjacent first gas collecting wall panels and the second gas collecting wall panels toward the horizontal plane is 5-8 cm.

9. The continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 7, characterized in that: It also includes an aeration device, which is arranged at the bottom of the short-range nitrification-anaerobic ammonium oxidation main reactor; The aeration device is configured to aerate the short-cut nitrification-anaerobic ammonium oxidation main reactor so that the fluid volume in the gas-water riser of the three-phase separator is 5-10 times the aeration volume.

10. The continuous integrated short-cut nitrification-anaerobic ammonium oxidation system according to claim 4, characterized in that: The short-cut denitrification unit includes: An annular baffle, the outer wall of which is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor, the annular baffle is provided with a first through hole, and the annular baffle is provided with a first carbon source injection port; A lower screen, wherein the lower screen is arranged below the annular baffle, the lower screen is spaced apart from the annular baffle, and the outer wall of the lower screen is in contact with the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor; A vertical baffle, the vertical baffle is connected to the top of the lower screen, the vertical baffle is provided with a second through hole; a spacing is provided between the top of the vertical baffle and the bottom of the annular baffle to form a circulation port; An upper screen, wherein the upper screen cover is arranged on the top of the first through hole; The outer wall of the vertical baffle, the top wall of the lower screen, the bottom wall of the upper screen and the inner wall of the short-range nitrification-anaerobic ammonium oxidation main reactor form a first inner cavity, the second through hole is connected to the first through hole, the inner wall of the second through hole, the inner wall of the first through hole, the top wall of the lower screen and the bottom wall of the upper screen form a second inner cavity; the first carbon source injection port is connected to the first inner cavity; the circulation port is connected to the first inner cavity and the second inner cavity; A carbon source adding pipe, the carbon source adding pipe is wound around the top of the annular baffle, a second carbon source injection port is provided at the bottom of the carbon source adding pipe, and the second carbon source injection port is connected to the first carbon source injection port; A carbon source batching device is connected to the carbon source adding pipe and the first reflux regulating valve.

11. A continuous integrated short-cut nitrification-anaerobic ammonium oxidation method, characterized in that: A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system for use in any one of claims 1 to 10, comprising: Inoculate the granular sludge into the short-cut nitrification unit; The water inlet device discharges the sewage into the short-cut nitrification unit to carry out a short-cut nitrification reaction; The sludge separation unit separates the granular sludge smaller than the preset size into the sludge upflow regeneration device, a part of the granular sludge not smaller than the preset size settles in the short-range nitrification unit, and a part of the granular sludge not smaller than the preset size enters the anaerobic ammonium oxidation unit; the sewage enters the anaerobic ammonium oxidation unit to undergo anaerobic ammonium oxidation reaction; The sewage enters the short-cut denitrification unit and undergoes short-cut denitrification reaction; Sewage enters the clarification unit, part of the effluent from the clarification unit flows into the outside of the continuous integrated short-cut nitrification-anaerobic ammonium oxidation system, part of the effluent from the clarification unit flows into the sludge upflow regeneration device, part of the effluent from the clarification unit flows into the anaerobic ammonium oxidation unit, and part of the effluent from the clarification unit is used to dilute the carbon source and enter the short-cut denitrification unit; The sludge upflow regeneration device breaks up the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, which is transported to the short-range nitrification unit.

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