A continuous integrated short-cut nitrification-anaerobic ammonium oxidation system and method

Abstract

The present application relates to the technical field of sewage treatment, and provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system and method. The system includes a water inlet device; a shortcut nitrification-anaerobic ammonium oxidation main reactor, in which a clarification unit, a shortcut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a shortcut nitrification unit are arranged; a sludge upflow regeneration device, the sludge separation unit is configured to separate granular sludge smaller than a preset size into the sludge upflow regeneration device, and the sludge upflow regeneration device is configured to break the granular sludge smaller than the preset size and form granular sludge not smaller than the preset size, and convey it to the shortcut nitrification unit. The present application can screen and recycle granular sludge, promote the regeneration of granular sludge, and couple the shortcut denitrification process, so as to realize the long-term stable operation of the device.

Description

Technical Field

[0001] This application relates to sewage treatment technology. In particular, it relates to a continuous integrated shortcut 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 nitrogen removal technology in sewage treatment, that is, under anoxic conditions, ammonia is used as the electron donor and nitrite nitrogen is used as the electron acceptor to oxidize ammonia into nitrogen gas. The shortcut nitrification-anaerobic ammonium oxidation process derived therefrom can achieve autotrophic nitrogen removal without adding a carbon source, and at the same time save 60% of the aeration energy consumption. It is a promising high-efficiency biological nitrogen removal process.

[0003] The shortcut nitrification-anaerobic ammonium oxidation process can be divided into an integrated process and a split process. In the integrated system, the two reaction stages are carried out in one reactor, and two functional bacteria: AOB, Ammonia-oxidizing bacteria and AnAOB, Anaerobic Ammonium-Oxidizing Bacteria coexist. It has the advantages of low construction cost, small floor area, large volume load, and can effectively avoid the inhibitory effect caused by the accumulation of nitrite. Therefore, it has a wider engineering application.

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

[0005] This application provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system and method, which can screen and recycle granular sludge, promote the regeneration of granular sludge, and couple the shortcut denitrification process, and can realize the long-term stable operation of the device.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] In the first aspect, this application provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system, including:

[0008] An influent device;

[0009] A shortcut nitrification-anaerobic ammonium oxidation main reactor, which is connected to the influent device; a clarification unit, a shortcut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit, and a shortcut nitrification unit are arranged in the shortcut nitrification-anaerobic ammonium oxidation main reactor;

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

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

[0013] The container comprises a third water inlet provided at the lower portion of the container, the third water inlet being connected to the sludge separation unit to receive granular sludge smaller than a preset size; a first water inlet and a second water inlet being provided at the bottom of the container, the first water inlet and the second water inlet being connected to the clarification unit to receive water flow from the clarification unit; an air outlet being provided at the top of the container; a first mud discharge port being provided at the lower portion of the container, the first mud discharge port being connected to the short-cut nitrification unit; and a first water outlet being provided at the upper portion of the container, the first water outlet being connected to the short-cut 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 serrated 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 on 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 connected to the bottom end of the connector, wherein an extension 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, which is connected to the first reflux regulating valve, which is connected to the short-range denitrification unit; the third water outlet is connected to the second reflux regulating valve, which is connected to the anaerobic ammonia oxidation unit; the third water outlet is connected to the third reflux regulating valve, which is connected to the first water inlet and the second water inlet.

[0022] In some embodiments, the water tank includes;

[0023] An effluent weir plate, the effluent weir plate is connected to the inner wall of the shortcut nitrification-anaerobic ammonium oxidation main reactor, and the top of the effluent weir plate is lower than the second water outlet;

[0024] A buffer plate is arranged between the effluent weir plate and the second water outlet. The top of the buffer plate is connected to the inner top wall of the shortcut nitrification-anaerobic ammonium oxidation main reactor, and there is a gap between the bottom of the buffer plate and the effluent weir plate;

[0025] A folded baffle, the folded baffle includes a first baffle section and a second baffle section. One end of the first baffle section is inserted into the second water outlet, the other end of the first baffle section is connected to the top of the second baffle section, there is a gap between the bottom of the second baffle section and the effluent weir plate, the bottom of the second baffle section is higher than the bottom of the buffer plate, and there is an included angle between the extending directions of the first baffle section and the second baffle section.

[0026] In some embodiments, the sludge separation unit includes a plurality of three-phase separators and a plurality of hydrocyclones;

[0027] The plurality of three-phase separators are arranged at intervals. The three-phase separator is configured to settle granular sludge in the shortcut nitrification unit, the aqueous phase flows into the anaerobic ammonium oxidation unit, and the gas-water mixture carries granular sludge and flocculent sludge into the hydrocyclone; <X

[0028] The plurality of hydrocyclones are connected to the plurality of three-phase separators in one-to-one correspondence. The hydrocyclone is located above the three-phase separator. The feed port of the hydrocyclone is communicated with the three-phase separator. The underflow port of the hydrocyclone is communicated with the anaerobic ammonium oxidation unit. The overflow port of the hydrocyclone is communicated with the sludge upflow regeneration device. The hydrocyclone is configured to return granular sludge greater than or equal to a preset size to the anaerobic ammonium oxidation unit through the underflow port, and flow 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 a gas-water riser pipe, a first partition baffle, a second partition baffle, a first gas-collecting wall plate and a second gas-collecting wall plate. The first gas-collecting wall plate and the second gas-collecting wall plate are respectively located on opposite sides of the gas-water riser pipe and are both connected to the bottom of the gas-water riser pipe;

[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 multiple three-phase separators are arranged alternately, and the projected parts of adjacent first gas collecting wall plates and second gas collecting wall plates towards the horizontal plane overlap. The top of the first partition baffle is connected to the lower part of the first gas collecting wall plate, and the top of the second partition baffle is connected to the lower part of the second gas collecting wall plate to form an anammox unit and a shortcut nitrification unit. The upper parts of the first gas collecting wall plate and the second gas collecting wall plate are located in the anammox 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 shortcut nitrification unit.

[0031] In some embodiments, the overlapping distance of the projections of adjacent first gas collecting wall plates and second gas collecting wall plates towards 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 shortcut nitrification - anammox main reactor;

[0033] The aeration device is configured to aerate the shortcut nitrification - anammox 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 shortcut denitrification unit includes:

[0035] An annular baffle, the outer wall of the annular baffle fits the inner wall of the shortcut nitrification - anammox main reactor. A first through - hole is axially formed in the middle area of the annular baffle. The annular baffle is provided with a plurality of first carbon source injection ports, and the plurality of carbon source injection ports are circumferentially spaced around the annular baffle;

[0036] A lower - layer screen, the lower - layer screen is arranged below the annular baffle, there is a spacing between the lower - layer screen and the annular baffle, and the outer wall of the lower - layer screen fits the inner wall of the shortcut nitrification - anammox main reactor;

[0037] A vertical baffle, the vertical baffle is connected to the top of the lower - layer screen, and a second through - hole is axially formed in the middle area of the vertical baffle; there is a spacing between the top of the vertical baffle and the bottom of the annular baffle to form a circulation port;

[0038] An upper - layer screen, the upper - layer screen covers the top of the first through - hole and is connected to the annular baffle;

[0039] The outer wall of the vertical baffle, the top wall of the lower - layer screen, the bottom wall of the upper - layer screen and the inner wall of the shortcut nitrification - anammox main reactor form a first inner cavity. The second through - hole communicates with 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 - layer screen and the bottom wall of the upper - layer screen form a second inner cavity; the first carbon source injection port communicates with the first inner cavity; the circulation port communicates the first inner cavity and the second inner cavity;

[0040] A carbon source addition pipe is wound around the top of the annular baffle, and a plurality of second carbon source injection ports are arranged at the bottom of the carbon source addition pipe. The plurality of second carbon source injection ports are arranged in one-to-one correspondence with the plurality of first carbon source injection ports.

[0041] A carbon source batching device is communicated with the carbon source addition pipe and is also communicated with the first reflux regulating valve.

[0042] In a second aspect, the present application provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation method for the above-mentioned continuous integrated shortcut nitrification-anaerobic ammonium oxidation system, including:

[0043] Inoculating granular sludge into the shortcut nitrification unit;

[0044] An influent device discharges sewage into the shortcut nitrification unit for shortcut nitrification reaction;

[0045] A sludge separation unit separates granular sludge smaller than a preset size into a sludge upflow regeneration device. Part of the granular sludge not smaller than the preset size settles in the shortcut nitrification unit, and 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 for anaerobic ammonium oxidation reaction;

[0046] The sewage enters the shortcut denitrification unit for shortcut denitrification reaction;

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

[0048] The sludge upflow regeneration device breaks the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, and transports it to the shortcut nitrification unit.

[0049] The present application provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system and method. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system includes a water inlet device, a shortcut nitrification-anaerobic ammonium oxidation main reactor, and an upflow sludge regeneration device. The shortcut nitrification-anaerobic ammonium oxidation main reactor is communicated with the water inlet device. A clarification unit, a shortcut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit, and a shortcut nitrification unit are arranged in the shortcut nitrification-anaerobic ammonium oxidation main reactor. The upflow sludge regeneration device is communicated with the sludge separation unit and the clarification unit, and is also communicated with the shortcut nitrification unit. The sludge separation unit separates granular sludge smaller than a preset size into the upflow sludge regeneration device. The upflow sludge regeneration device crushes the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, and conveys it into the shortcut nitrification unit. In this way, granular sludge can be screened and recycled, the regeneration of granular sludge can be promoted, and the shortcut denitrification process can be coupled, so that the long-term stable operation of the device can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 FIG. is a schematic structural diagram of a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0052] Figure 2 FIG. is a schematic structural diagram of a sludge separation unit in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0053] Figure 3 FIG. is a schematic structural diagram of a shortcut denitrification unit in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0054] Figure 4 FIG. is a schematic structural diagram of an annular plate and a carbon source addition pipe in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0055] Figure 5 FIG. is a partial structural diagram of a clarification unit in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0056] Figure 6 FIG. is a schematic structural diagram of an upflow sludge regeneration device in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application;

[0057] Figure 7 This is a schematic flow diagram of a continuous integrated shortcut nitrification-anaerobic ammonium oxidation method provided by an embodiment of the present application.

[0058] Explanation of the reference numerals in the drawings:

[0059] 100 - Water inlet device; 110 - Raw water tank; 120 - Raw water pump; 130 - Reactor inlet pipe; 140 - Effluent return pipe; 150 - Effluent return pipe valve;

[0060] 200 - Shortcut nitrification-anaerobic ammonium oxidation main reactor; 210 - Reactor outlet pipe; 220 - Effluent valve; 230 - Aeration device; 240 - Fourth water inlet; 250 - Sludge inlet; 260 - Second sludge discharge port; 270 - Fifth water inlet; 280 - Reactor return pipe; 290 - Reactor return 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 - Effluent weir plate; 370 - Buffer plate; 380 - Folded baffle;

[0062] 400 - Shortcut denitrification unit; 410 - Annular baffle; 420 - First inner cavity; 430 - Second inner cavity; 440 - Circulation port; 450 - Upper layer sieve; 460 - Lower layer sieve; 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 collection wall plate; 615 - Second gas collection wall plate; 620 - Hydrocyclone; 621 - Feed inlet; 622 - Underflow port; 623 - Overflow port; 624 - Hydrocyclone overflow pipe;

[0065] 700 - Shortcut nitrification unit;

[0066] 800 - Upflow sludge regeneration device; 810 - Third water inlet; 820 - First water inlet; 830 - Second water inlet; 840 - Gas outlet; 850 - First sludge discharge port; 860 - First water outlet; 870 - Diversion pipe; 880 - Spiral guide plate; 890 - Connector; 8100 - Swirl baffle; 8110 - Mud receiving plate; 8120 - Serrated structure. Detailed implementation manners

[0067] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0068] In the related art, integrated partial nitrification-anammox requires strict control of aeration. Due to the coexistence of multiple microbial populations, the formation, stability maintenance, and regeneration of anammox granular sludge are difficult, and it is vulnerable to load shock, resulting in system instability.

[0069] To overcome the defects in the prior art, a continuous integrated partial nitrification-anammox system and method provided in this application. A continuous integrated partial nitrification-anammox system includes a water inlet device, a partial nitrification-anammox main reactor, and a sludge upflow regeneration device. The partial nitrification-anammox main reactor is connected to the water inlet device. A clarification unit, a partial denitrification unit, an anammox unit, a sludge separation unit, and a partial nitrification unit are arranged in the partial nitrification-anammox main reactor. The sludge upflow regeneration device is connected to the sludge separation unit and the clarification unit, and is also connected to the partial 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, and conveys it to the partial nitrification unit. In this way, granular sludge can be screened and recycled, the regeneration of granular sludge can be promoted, and the partial denitrification process can be coupled, enabling the long-term stable operation of the device.

[0070] The following will describe the content of this application in detail with reference to the accompanying drawings, so that those skilled in the art can understand the content of this application more clearly and in detail.

[0071] Figure 1 It is a schematic structural diagram of a continuous integrated partial nitrification-anammox system provided in the embodiments of this application.

[0072] See Figure 1 As shown, this application provides a continuous integrated partial nitrification-anammox system, including a water inlet device 100.

[0073] In some embodiments, a continuous integrated partial nitrification-anammox system includes a partial nitrification-anammox main reactor 200.

[0074] Among them, the main reactor 200 for shortcut nitrification-anaerobic ammonium oxidation is connected to the water inlet device 100.

[0075] Among them, a clarification unit 300, a shortcut denitrification unit 400, an anaerobic ammonium oxidation unit 500, a sludge separation unit 600, and a shortcut nitrification unit 700 are arranged in the main reactor 200 for shortcut nitrification-anaerobic ammonium oxidation.

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

[0077] Among them, 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 shortcut nitrification unit 700.

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

[0079] The shortcut nitrification unit 700 can oxidize (ammonium cations) in the sewage into (nitrite anions).

[0080] The anaerobic ammonium oxidation unit 500 can carry out anaerobic ammonium oxidation reaction, reacting and in the wastewater and simultaneously generating (nitrate anions) and (nitrogen).

[0081] The shortcut denitrification unit 400 can carry out shortcut denitrification reaction on a small amount of after passing through the anaerobic ammonium oxidation unit and transform it into , and then enter 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 effluent quality.

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

[0084] The sludge upflow regeneration device 800 is configured to crush particulate sludge smaller than the preset size and form particulate sludge not smaller than the preset size, and convey it into the shortcut nitrification unit 700. In this way, particulate sludge can be screened and recycled, promoting the regeneration of particulate sludge, and coupling with the shortcut denitrification process, which can realize the 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 will be described below:

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

[0088] The water inlet device 100 includes a raw water pump 120 and a reactor inlet pipe 130. The reactor inlet pipe 130 is communicated with the raw water tank 110 and is also communicated with the third water inlet of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200.

[0089] The water inlet device 100 includes an effluent return pipe 140 and an effluent return pipe valve 150. The effluent return pipe 140 is communicated with the raw water tank 110, and the effluent return pipe valve 150 controls whether the effluent return pipe 140 is communicated with the reactor outlet pipe 210 or not. Among them, the reactor outlet pipe 210 is communicated with the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 and is also communicated with the outlet valve 220. The outlet valve 220 controls whether the reactor outlet pipe 210 is communicated with the outside of a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system or not.

[0090] Figure 2 It is a schematic structural diagram of a sludge separation unit in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application.

[0091] The specific structure of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 will be described below:

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

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

[0094] Specifically, the aeration device 230 includes a gas source and a plurality of aeration discs. The plurality of aeration discs are arranged at intervals, and the aeration discs are communicated with the gas source. At least part of the aeration discs are located in the inner cavity.

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

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

[0097] Among them, the sludge inlet 250 is located above the fourth water inlet 240, which is beneficial to the full contact between the sewage and the granular sludge.

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

[0099] Among them, the second sludge discharge port 260 is located above the sludge 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] The lower part of the short-cut nitrification-anaerobic ammonium oxidation main reactor 200 is provided with a fifth water inlet 270. The fifth water inlet 270 is used to communicate with the sludge upflow regeneration device 800 and receive the liquid discharged from the sludge upflow regeneration device 800, so as to further treat 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 hydrocyclones 620. Specifically, the number of the three-phase separators 610 can 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, the plurality of three-phase separators 610 are arranged at intervals. The three-phase separator 610 is configured to settle the granular sludge in the short-cut nitrification unit 700, the water phase flows into the anaerobic ammonium oxidation unit 500, and the gas-liquid mixture carries the granular sludge and flocculent sludge into the hydrocyclone 620 under a large aeration volume.

[0104] The plurality of hydrocyclones 620 are connected to the plurality of three-phase separators 610 in one-to-one correspondence. The hydrocyclone 620 is located above the three-phase separator 610.

[0105] The feed inlet 621 of the cyclone separator 620 is communicated with the three-phase separator 610, and the underflow port 622 of the cyclone separator 620 is communicated with the anammox unit 500. The cyclone separator 620 is configured to return granular sludge with a size greater than or equal to a preset size to the anammox unit 500 through the underflow port 622. Moreover, a part of the granular sludge then falls into the shortcut nitrification unit 700 under the action of gravity.

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

[0107] Exemplarily, the gas-water flow passes through the three-phase separator 610, the granular sludge settles in the shortcut nitrification unit 700, the aqueous phase flows into the anammox unit 500, and the gas-water mixture carries granular sludge and flocculent sludge into the cyclone separator 620 under a relatively large aeration volume. The gas-water mixture is separated by the cyclone separator 620. The granular sludge with a particle size of not less than 1 mm returns to the anammox unit 500 through the underflow port 622 of the cyclone separator 620, and a small part of the granular sludge then falls into the shortcut nitrification unit 700 through the gas collection wall plate of the three-phase separator 610. The flocculent sludge with a size smaller than 1 mm (which cannot be stratified) flows to the sludge upflow regeneration device 800 through the overflow port 623 for a water flow shearing and granulation process, and the formed regenerated granular sludge and water then enter the shortcut nitrification unit 700.

[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 collection wall plate 614, and a second gas collection wall plate 615.

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

[0110] Along the extension direction, the length of the first gas collection wall plate 614 is greater than that of the second gas collection wall plate 615. The first gas collection wall plates 614 and the second gas collection wall plates 615 in multiple three-phase separators 610 are arranged alternately, and the projected parts of the adjacent first gas collection wall plate 614 and the second gas collection wall plate 615 on the horizontal plane overlap. The top of the first partition baffle 612 is connected to the lower part of the first gas collection wall plate 614, and the top of the second partition baffle 613 is connected to the lower part of the second gas collection wall plate 615. To form the anammox unit 500 and the shortcut nitrification unit 700, the upper parts of the first gas collection wall plate 614 and the second gas collection wall plate 615 are located in the anammox unit 500, and the lower parts of the first gas collection wall plate 614 and the second gas collection wall plate 615, as well as the first partition baffle 612 and the second partition baffle 613, are located in the shortcut nitrification unit 700.

[0111] It can be understood that the Venturi effect is formed by the arrangement of 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 cross-sectional area of the flow-through section, the fluid velocity increases, and the velocity is inversely proportional to the cross-sectional area of the flow-through section. According to Bernoulli's law, the increase in velocity is accompanied by a decrease in fluid pressure, which is the common Venturi phenomenon. Generally speaking, this effect means that a low pressure will be generated near the high-speed flowing fluid, thus generating an adsorption effect. Specifically, when the water flows between two adjacent three-phase separators 610, the cross-sectional area of the flow-through section decreases, the flow velocity increases, and a low pressure will be generated nearby. It is difficult for gas to enter the anammox unit 500 through this area, while the water flow can rise and enter the anammox unit 500. Therefore, the space from this area to the bottom outlet 622 of the cyclone separator 620 can form an anammox functional area, which simplifies the structure of the integrated shortcut nitrification-anammox reactor.

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

[0113] It can be understood that when the fluid volume in the gas-water riser 611 is less than 5 times the aeration volume, the content of granular sludge and flocculent sludge in the gas-water riser 611 is less. When the fluid volume in the gas-water riser 611 is greater than 10 times the aeration volume, the aeration volume is large, which easily affects the activity of the granular sludge, and there is less granular sludge in the shortcut nitrification unit 700.

[0114] Among them, the area between the lower parts 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 2 is the setting area of the shortcut nitrification unit 700. Among them, the area between the lower parts of the first gas-collecting wall plate 614 and the second gas-collecting wall plate 615 of the three-phase separator 610 and the shortcut denitrification unit 400 is the setting area of the anammox unit 500. The lower parts of the first gas-collecting wall plate 614 and the second gas-collecting wall plate 615 are at the positions shown by the dotted lines in the figure.

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

[0116] Among them, the first extension part and the fourth extension part are symmetrically arranged about the axis of the gas-water riser 611. The lengths of the first extension part and the fourth extension part along the extension direction are the same.

[0117] Among them, the second extension part and the fifth extension part are symmetrically arranged about the axis of the gas-water riser pipe 611. The extension directions of the second extension part and the fifth extension part are the same as the axis of the gas-water riser pipe 611. The lengths of the second extension part and the fifth extension part along the extension direction are the same.

[0118] Among them, the extension directions of the third extension part and the sixth extension part have the same included angle with the axis of the gas-water riser pipe 611. The length of the third extension part along the extension direction is greater than the length of the sixth extension part along the extension direction.

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

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

[0121] Specifically, the overlapping distance of the projections of the adjacent third extension part and the sixth extension part towards the horizontal plane is 5 - 8 cm.

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

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

[0124] Figure 3 It is a schematic structural diagram of the short-term denitrification unit in a continuous integrated short-term nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application. Figure 4 It is a schematic structural diagram of an annular plate and a carbon source adding pipe in a continuous integrated short-term nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application.

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

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

[0127] Among them, the outer wall of the annular baffle 410 fits against the inner wall of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200, and a first through-hole penetrating axially is provided in the middle area of the annular baffle 410.

[0128] Specifically, the annular baffle 410 is in the shape of a flat plate and is in the shape of a round cake. A hole is drilled in the middle area of the annular baffle 410 to form the first through-hole. The axis of the first through-hole is collinear 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, and the plurality of carbon source injection ports are arranged at intervals along the circumferential direction of the annular baffle 410. The first carbon source injection port 411 is a through-hole and is provided at the top of the annular baffle 410.

[0130] The shortcut denitrification unit 400 includes a lower layer screen 460.

[0131] The lower layer screen 460 is arranged below the annular baffle 410, there is a distance between the lower layer screen 460 and the annular baffle 410, and the outer wall of the lower layer screen 460 fits against the inner wall of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200.

[0132] The shortcut denitrification unit 400 includes a vertical baffle 490.

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

[0134] Specifically, the vertical baffle 490 is in the shape of a cylinder. A hole is drilled in the middle area of the vertical baffle 490 to form the second through-hole. The axis of the second through-hole is collinear with the axis of the vertical baffle 490.

[0135] There is a distance between the top of the vertical baffle 490 and the bottom of the annular baffle 410 to form a circulation port 440.

[0136] The shortcut denitrification unit 400 includes an upper layer screen 450.

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

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

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

[0140] The carbon source addition pipe 470 is wound around the top of the annular baffle 410. A plurality of second carbon source injection ports 471 are provided at the bottom of the carbon source addition pipe 470, and the plurality of second carbon source injection ports 471 are arranged in one-to-one correspondence with a plurality of first carbon source injection ports 411. The second carbon source injection port 471 communicates with the corresponding first carbon source injection port 411.

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

[0142] The carbon source batching device 480 communicates with the carbon source addition pipe 470 and also communicates with the first reflux regulating valve 330.

[0143] Wherein, the first inner cavity 420 and the second inner cavity 430 are filled with packing materials.

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

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

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

[0147] The short-cut denitrification unit 400 can remove excessive , and make up for for the anaerobic ammonium oxidation unit 500 below. Under the action of hydraulic swirl, the carbon source is evenly dispersed in the packing layer, 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 less 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 of the radius of the second inner cavity 430.

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

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

[0151] The distance from the bottom of the effluent tank to the inner top wall of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 is one-fifth of the height of the inner cavity of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200.

[0152] See Figure 5 As shown, in some embodiments, a second water outlet 310 is provided in the upper part of the effluent tank, and the second water outlet 310 is communicated with the reactor outlet pipe 210.

[0153] A third water outlet 320 is provided in the lower part of the effluent tank, and the third water outlet 320 is communicated with a first reflux regulating valve 330, and the first reflux regulating valve 330 is communicated with the shortcut denitrification unit 400.

[0154] Specifically, the first reflux regulating valve 330 is communicated with a carbon source batching device 480.

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

[0156] Among them, the third water outlet 320 is communicated with a 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 can be understood that the concentration in the anaerobic ammonium oxidation area is detected in the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 to control the flow rate of the recirculated water and timely adjust the reaction rates of shortcut nitrification and anaerobic ammonium oxidation. When the concentration is too low, the recirculated water can increase the flow rate and enter the anaerobic ammonium oxidation unit 500, which can improve the start-up efficiency of the integrated shortcut nitrification and anaerobic ammonium oxidation reaction.

[0158] Specifically, the design of the effluent tank can slow down the effluent rate, enable the water flow to preferentially return to the shortcut nitrification-anaerobic ammonium oxidation main reactor 200, and can adjust the recirculated water volume of each water path through the first reflux regulating valve 330, the second reflux regulating valve 340, and the third reflux regulating valve 350 to control the effluent quality.

[0159] In some embodiments, the tank includes an effluent weir plate 360.

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

[0161] Specifically, the water outlet weir plate 360 includes a water outlet weir wall plate and a water outlet weir bottom plate that are connected to each other. The water outlet weir wall plate is vertically arranged, and the water outlet weir bottom plate is horizontally arranged. The dimension that the water outlet weir wall plate is lower than the second water outlet 310 is 3 to 5 cm.

[0162] Wherein, a buffer plate 370 is arranged between the water 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 shortcut nitrification-anaerobic ammonium oxidation main reactor 200, and there is a distance between the bottom of the buffer plate 370 and the water outlet weir plate 360.

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

[0164] In some embodiments, the water tank includes a folded baffle 380.

[0165] The folded baffle 380 includes a first baffle segment and a second baffle segment. One end of the first baffle segment is inserted into the second water outlet 310, the other end of the first baffle segment is connected to the top of the second baffle segment, there is a distance between the bottom of the second baffle segment and the water outlet weir plate 360, and there is an included angle between the extending directions of the first baffle segment and the second baffle segment.

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

[0167] Figure 6 It is a schematic structural diagram of a sludge upflow regeneration device in a continuous integrated shortcut nitrification-anaerobic ammonium oxidation system provided by an embodiment of the present application.

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

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

[0170] A third water inlet 810 is arranged at the lower part of the container. The third water inlet 810 is communicated with the sludge separation unit 600 to receive granular sludge smaller than a preset size. Specifically, the overflow port 623 of the hydrocyclone 620 is communicated with the third water inlet 810 through a hydrocyclone overflow pipe 624.

[0171] A first water inlet 820 and a second water inlet 830 are arranged at the bottom of the container. 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 return pipe 280 through the third return regulating valve 350. The reactor return pipe 280 is connected to the reactor return pump 290, and the reactor return 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 sludge discharge port 850 is provided at the lower part of the container, and the first sludge discharge port 850 is connected to the partial nitrification unit 700.

[0175] A first water outlet 860 is provided at the upper part of the container, and the first water outlet 860 is connected to the partial nitrification unit 700.

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

[0177] The sludge upflow regeneration device 800 includes a draft tube 870.

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

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

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

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

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

[0183] Wherein, the swirl baffle 8100 is connected to the bottom end of the connecting piece, and the extending direction of the swirl baffle 8100 has a first angle with the 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 mud collecting plate 8110.

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

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

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

[0189] When the second included angle is less than 20°, the inclination angle of the mud receiving plate 8110 is small, and the granular sludge is not easily slid to the first sludge discharge port 850. Moreover, the effect of increasing the tangential water flow velocity and circulation and enhancing the swirl by the mud receiving plate 8110 is poor. The water shear force can crush the flocculent sludge, promote the regeneration of granular sludge, replenish the integrated shortcut nitrification and anaerobic ammonium oxidation reaction device, and solve the process instability caused by the floating and loss of flocculent sludge.

[0190] It can be understood that the water flows from the first water inlet 820 and the second water inlet 830 form a two-way counter-flushing water inlet, and then two helically upward fluids are formed near the draft tube 870 through the spiral guide plate 880. The bubbles and the muddy water coating layer of the flocculent sludge are cut by numerous sawtooth structures 8120, and the gas, mud, and the enclosed water can be separated. After the rising mud and water flow are obliquely cut by the swirl baffle 8100, a part of the water forms a reflux, and a part of the water passes through the gap between the upper end of the swirl baffle 8100 and the draft tube 870 and rises at an increased speed. The water flows back in the upper part of the sludge up-flow regeneration device 800, passes through the gap between the lower end of the swirl baffle 8100 and the mud receiving plate 8110, and is obliquely blocked by the mud receiving plate, forming a swirl in the area below the mud receiving plate 8110 and the swirl baffle 8100, enhancing mass transfer, strengthening the interphase mixing of mud and water, and making the broken sludge particles adhere into balls.

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

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

[0193] Figure 7 This is a schematic flow chart of a continuous integrated shortcut nitrification - anaerobic ammonium oxidation method provided by an embodiment of the present application.

[0194] See Figure 7As shown in the figure, the present application provides a continuous integrated shortcut nitrification-anaerobic ammonium oxidation method for the above-mentioned continuous integrated shortcut nitrification-anaerobic ammonium oxidation system, including:

[0195] S101. Inoculate granular sludge into the shortcut nitrification unit.

[0196] S102. The water inlet device discharges sewage into the shortcut nitrification unit for shortcut 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 shortcut denitrification unit for shortcut denitrification reaction.

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

[0200] S106. The sludge upflow regeneration device breaks the granular sludge smaller than the preset size and forms granular sludge not less than the preset size, and transports it to the shortcut nitrification unit.

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

[0202] Inoculate the integrated anaerobic ammonium oxidation granular sludge into the interior of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200, the sludge inoculation amount is 2% to 3%, close the effluent valve 220, and open the effluent reflux pipe valve 150. Start the inlet water and aeration of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200, control the dissolved oxygen in the shortcut nitrification unit 700 at 0.2 to 0.5 mg / L through aeration, the wastewater first enters the shortcut nitrification unit 700 for shortcut nitrification reaction, and oxidize half of the to nitrite nitrogen , then the wastewater enters the anaerobic ammonium oxidation unit 500 for anaerobic ammonium oxidation reaction, react the and in the wastewater simultaneously to generate and Maintain the reactor to operate the integrated shortcut nitrification-anaerobic ammonium oxidation reaction for 3 to 5 hours. Meanwhile, the granular sludge is also evenly distributed in the shortcut nitrification unit 700 and the anaerobic ammonium oxidation unit 500. At this time, the effluent of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 is refluxed into the raw water tank 110.

[0203] Inside the reactor Perform the shortcut denitrification reaction in the shortcut denitrification unit 400 and transform it into , and then enter the anaerobic ammonium oxidation unit 500 through the second reflux regulating valve 340 to provide substrates for the anaerobic ammonium oxidation reaction.

[0204] After operating for 1 to 2 hours, close the valve of the effluent reflux pipe 150, open the effluent valve 220, and keep the influent of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 always open. Control the ratio of the reflux water to the effluent of the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 to be 4-6:1 through the first reflux regulating valve 330, the second reflux regulating valve 340, and the third reflux regulating valve 350, and the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 has normal influent and effluent.

[0205] The granular sludge growing continuously in the shortcut nitrification-anaerobic ammonium oxidation main reactor 200 is regularly discharged from the second sludge discharge port 260 and applied as the bacterial source for the next batch of anaerobic ammonium oxidation reactors to achieve rejuvenation and expansion of the granular sludge.

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

[0207] Generally speaking, the terms should be understood at least in part by their use in the context. For example, at least in part according to the context, the term "one or more" used in the text can be used to describe any feature, structure or characteristic in the sense of singularity, or can be used to describe a combination of features, structures or characteristics in the sense of plurality. Similarly, at least in part according to the context, terms such as "a" or "the" can also be understood as conveying singular usage or conveying plural usage.

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

[0209] In addition, for the sake of convenience in description, spatial relative terms may be used in the text, such as "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than the orientation shown in the drawings. The device may have other orientations (rotated 90° or in other orientations), and the spatial relative descriptive terms used in the text may be interpreted accordingly as well.

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

[0211] In addition, the terms "comprise" and "have" and any variations thereof are intended to cover but not be exclusive of inclusion. For example, a product or device that comprises a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0212] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of this application.

[0213] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0214] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. 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 shortcut nitrification-anaerobic ammonium oxidation system, characterized in that, Comprising: An inlet device; A shortcut nitrification-anaerobic ammonium oxidation main reactor, which is communicated with the inlet device; a clarification unit, a shortcut denitrification unit, an anaerobic ammonium oxidation unit, a sludge separation unit and a shortcut nitrification unit are arranged in the shortcut nitrification-anaerobic ammonium oxidation main reactor; A sludge upflow regeneration device, which is communicated with the sludge separation unit, the clarification unit and the shortcut nitrification unit; The sludge separation unit is configured to separate granular sludge smaller than a preset size into the sludge upflow regeneration device, and the sludge upflow regeneration device is configured to break the granular sludge smaller than the preset size and form granular sludge not smaller than the preset size, and convey it into the shortcut nitrification unit; The sludge upflow regeneration device includes: A container, a third water inlet is arranged 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 the preset size; A first water inlet and a second water inlet are arranged 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 arranged at the top of the container; a first sludge discharge port is arranged at the lower part of the container, and the first sludge discharge port is communicated with the shortcut nitrification unit; a first water outlet is arranged at the upper part of the container, and the first water outlet is communicated with the shortcut nitrification unit; A draft tube, a draft tube is arranged inside the container, a spiral guide plate is arranged at the lower part of the draft tube, a sawtooth structure is arranged at the upper part of the draft tube, and the first water inlet and the second water inlet are respectively located on opposite sides of the draft tube; A connecting piece, the top end of the connecting piece is connected with the draft tube, and the extending direction of the connecting piece has an included angle with the horizontal plane; A swirl baffle, the swirl baffle is connected with the bottom end of the connecting piece, and the extending direction of the swirl baffle has a first included angle with the horizontal plane; A sludge receiving plate, the bottom end of the sludge receiving plate is connected with the inner wall of the container, the extending direction of the sludge receiving plate has a second included angle with the horizontal plane, the sludge receiving plate is located below the swirl baffle, and the first sludge discharge port is located between the swirl baffle and the sludge receiving plate; The water flows of the first water inlet and the second water inlet form a two-way counter-flow water inlet, and then two spiral upward fluids are formed near the draft tube through the spiral guide plate. The bubbles and the muddy water wrapping layer of the flocculent sludge are cut by a plurality of the sawtooth structures, and the gas, mud and wrapped water can be separated; after the rising mud and water flow are obliquely cut by the swirl baffle, a part of the water forms a reflux, and a part of the water passes through the gap between the upper end of the swirl baffle and the draft tube and rises at an increased speed; the water flow refluxes in the upper part of the sludge upflow regeneration device, and passes through the gap between the lower end of the swirl baffle and the sludge receiving plate and is obliquely blocked by the sludge receiving plate, and a swirl is formed in the area below the sludge receiving plate and the swirl baffle, strengthening the interphase mixing of the mud and water, and making the broken sludge particles adhere into balls.

2. The continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 1, wherein, The first included angle is 30°-50°; And / or, the second included angle is 20°-30°.

3. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 1, characterized in that, The clarification unit includes an effluent tank, and a second outlet is provided at the upper part of the effluent tank, and the second outlet is communicated with the reactor outlet pipe; A third outlet is provided at the lower part of the effluent tank, the third outlet is communicated with a first reflux regulating valve, and the first reflux regulating valve is communicated with the partial denitrification unit; the third outlet is communicated with a second reflux regulating valve, and the second reflux regulating valve is communicated with the anaerobic ammonium oxidation unit; the third outlet is communicated with a third reflux regulating valve, and the third reflux regulating valve is communicated with the first inlet and the second inlet.

4. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 3, characterized in that, The water tank includes; An effluent weir plate, the effluent weir plate is connected to the inner wall of the partial nitrification-anaerobic ammonium oxidation main reactor, and the top of the effluent weir plate is lower than the second outlet; A buffer plate is arranged between the effluent weir plate and the second outlet, the top of the buffer plate is connected to the inner top wall of the partial nitrification-anaerobic ammonium oxidation main reactor, and there is a distance between the bottom of the buffer plate and the effluent weir plate; A folded baffle, the folded baffle includes a first baffle section and a second baffle section, one end of the first baffle section is inserted into the second outlet, the other end of the first baffle section is connected to the top of the second baffle section, there is a distance between the bottom of the second baffle section and the effluent weir plate, the bottom of the second baffle section is higher than the bottom of the buffer plate, and there is an included angle between the extending directions of the first baffle section and the second baffle section.

5. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to any one of claims 1 to 4, characterized in that, The sludge separation unit includes a plurality of three-phase separators and a plurality of hydrocyclones; The plurality of three-phase separators are arranged at intervals, and the three-phase separators are configured to settle granular sludge in the partial nitrification unit, the aqueous phase flows into the anaerobic ammonium oxidation unit, and the gas-water mixture carries granular sludge and flocculent sludge into the hydrocyclone; The plurality of hydrocyclones are connected to the plurality of three-phase separators in one-to-one correspondence, the hydrocyclones are located above the three-phase separators, the feed inlet of the hydrocyclone is communicated with the three-phase separator, the underflow port of the hydrocyclone is communicated with the anaerobic ammonium oxidation unit, the overflow port of the hydrocyclone is communicated with the sludge upflow regeneration device, and the hydrocyclone is configured to reflux granular sludge greater than or equal to the preset size to the anaerobic ammonium oxidation unit through the underflow port, and flow granular sludge smaller than the preset size to the sludge upflow regeneration device through the overflow port.

6. The continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 5, characterized in that, The three-phase separator includes a gas-water riser pipe, a first partition baffle, a second partition baffle, a first gas-collecting wall plate and a second gas-collecting wall plate, and the first gas-collecting wall plate and the second gas-collecting wall plate are respectively located on opposite sides of the gas-water riser pipe and are both connected to the bottom of the gas-water riser pipe; 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 a plurality of the three-phase separators are arranged alternately, and the projected parts of the adjacent first gas collecting wall plate and the second gas collecting wall plate facing the horizontal plane overlap. The top of the first partition baffle is connected to the lower part of the first gas collecting wall plate, and the top of the second partition baffle is connected to the lower part of the second gas collecting wall plate to form the anammox unit and the shortcut nitrification unit. The upper parts of the first gas collecting wall plate and the second gas collecting wall plate are located in the anammox unit, and the lower parts of the first gas collecting wall plate and the second gas collecting wall plate and the first partition baffle and the second partition baffle are located in the shortcut nitrification unit.

7. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 6, characterized in that The overlapping distance of the projected parts of the adjacent first gas collecting wall plate and the second gas collecting wall plate facing the horizontal plane is 5-8 cm.

8. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 6, characterized in that It further includes an aeration device, and the aeration device is arranged at the bottom of the shortcut nitrification-anammox main reactor; The aeration device is configured to aerate the shortcut nitrification-anammox main reactor so that the fluid volume in the gas-water riser of the three-phase separator is 5-10 times the aeration volume.

9. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation system according to claim 3, characterized in that, The shortcut denitrification unit includes: A circular baffle, the outer wall of the circular baffle fits the inner wall of the shortcut nitrification-anammox main reactor. The circular baffle is provided with a first through hole and a first carbon source injection port; A lower layer sieve, the lower layer sieve is arranged below the circular baffle, and there is a distance between the lower layer sieve and the circular baffle. The outer wall of the lower layer sieve fits the inner wall of the shortcut nitrification-anammox main reactor; A vertical baffle, the vertical baffle is connected to the top of the lower layer sieve, and the vertical baffle is provided with a second through hole; there is a distance between the top of the vertical baffle and the bottom of the circular baffle to form a circulation port; An upper layer sieve, the upper layer sieve covers the top of the first through hole; The outer wall of the vertical baffle, the top wall of the lower layer sieve, the bottom wall of the upper layer sieve and the inner wall of the shortcut nitrification-anammox main reactor form a first inner cavity. The second through hole communicates with 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 layer sieve and the bottom wall of the upper layer sieve form a second inner cavity; the first carbon source injection port communicates with the first inner cavity; the circulation port communicates the first inner cavity and the second inner cavity; A carbon source addition pipe, the carbon source addition pipe is wound around the top of the circular baffle, and the bottom of the carbon source addition pipe is provided with a second carbon source injection port, and the second carbon source injection port communicates with the first carbon source injection port; A carbon source batching device, the carbon source batching device communicates with the carbon source addition pipe and is also connected to the first reflux regulating valve.

10. A continuous integrated shortcut nitrification-anaerobic ammonium oxidation method, characterized in that, For a continuous integrated shortcut nitrification-anammox system according to any one of claims 1 to 9, it includes: Inoculating granular sludge into the shortcut nitrification unit; The water inlet device discharges sewage into the shortcut nitrification unit for shortcut nitrification reaction; The sludge separation unit separates granular sludge smaller than a preset size into the upflow sludge regeneration device. A part of the granular sludge not smaller than the preset size settles in the shortcut nitrification unit, and a part of the granular sludge not smaller than the preset size enters the anammox unit; the sewage enters the anammox unit for anammox reaction. The sewage enters the shortcut denitrification unit for shortcut denitrification reaction. The sewage enters the clarification unit. A part of the effluent of the clarification unit flows outside the continuous integrated shortcut nitrification-anammox system, a part of the effluent of the clarification unit flows into the upflow sludge regeneration device, a part of the effluent of the clarification unit flows into the anammox unit, and a part of the effluent of the clarification unit is used to dilute the carbon source and enters the shortcut denitrification unit. The upflow sludge regeneration device breaks the granular sludge smaller than the preset size and forms granular sludge not smaller than the preset size, which is transported to the shortcut nitrification unit.

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