Vertical integrated ao bioreactor tower and method of use thereof

Abstract

This invention discloses a vertical integrated AO bioreactor and its usage method, comprising, from top to bottom, a biological deodorization section, a defoaming and demisting section, a first biological reaction section, a second biological reaction section, and a sludge-water separation secondary sedimentation tank section. The biological deodorization section includes an internal biological deodorization packing layer and a biological deodorization spray system above it. The first biological reaction section includes a return water distribution pipe for the nitrified liquid and sludge mixture, and several first downcomers located below this pipe. The second biological reaction section includes several second downcomers and microporous aeration devices corresponding to the outlet positions of all second downcomers. A guide barrel is located at the center of the sludge-water separation secondary sedimentation tank section, and an outlet weir is located on the inner wall at the height of the guide barrel. This invention solves the problems of numerous small-scale wastewater and waste gas treatment devices, large footprint, low oxygen utilization rate in the biochemical system, and high air volume and energy consumption in waste gas treatment.

Description

Technical Field

[0001] This invention relates to the field of AO bioreactor technology, and in particular to a vertical integrated AO bioreactor tower and its usage method. Background Technology

[0002] Traditional A / O bioreactors typically consist of on-site cast-in-place reinforced concrete structures such as A / O tanks, secondary sedimentation tanks, and sludge tanks, with on-site installation of equipment such as blowers, water pumps, and aeration systems. This method has a long construction period (usually several weeks to several months), occupies a large area, has complex construction management, and is difficult to move or modify once completed.

[0003] Modular assembly equipment typically uses prefabricated A / O modules and sedimentation modules made of carbon steel, stainless steel, or fiberglass (FRP), which are then connected on-site via pipes and cables. While this approach shortens the on-site construction period to some extent, it is still essentially a modular integration, requiring each module to be arranged side-by-side, resulting in a large footprint and significant on-site connection work, as well as the risk of leakage.

[0004] Integrated tank systems are commonly used in small-scale domestic wastewater treatment (such as integrated MBR systems), integrating the biochemical zone into a horizontal or vertical tank. However, for industrial wastewater treatment requiring a complete A / O process and a highly efficient independent sedimentation unit, existing tank systems often have the following shortcomings:

[0005] The defects in the existing technology described above lead to the following adverse effects in practical applications:

[0006] 1. Poor process integrity, insufficient integration of key functions such as nitrification liquor return and sludge return, and reliance on complex external pipelines.

[0007] 2. Lack of auxiliary functions: auxiliary systems such as defoaming and odor pretreatment often need to be added externally, failing to achieve a true "turnkey" project.

[0008] 3. Low space utilization: Existing technologies are mostly single-layer or simple stacked, failing to make full use of vertical space to achieve ultimate compactness, resulting in limited space saving.

[0009] 4. Poor fluid dynamics: In vertical stacked structures, problems such as short-circuiting and gas-liquid-solid three-phase separation interference are prone to occur, affecting processing efficiency and stability.

[0010] Therefore, under the premise of meeting functional requirements, how to achieve a high degree of integration of AO bioreactors, reduce the footprint, and enable rapid deployment has become a technical problem that needs to be solved by technical personnel in the field. Summary of the Invention

[0011] In view of the above-mentioned defects of the prior art, the present invention provides a vertical integrated AO bioreactor tower and its usage method. The purpose is to solve the problems of numerous existing small-scale sewage and waste gas treatment equipment, large footprint, low oxygen utilization rate of biochemical systems, large waste gas treatment air volume and high energy consumption, and to achieve the requirements of A / O bioreactor with small footprint, low energy consumption and convenient operation and maintenance.

[0012] To achieve the above objectives, the present invention discloses a vertical integrated AO bioreactor, which includes, from top to bottom, a biological deodorization section, a defoaming and demisting section, a first bioreactor section, a second bioreactor section, and a sludge-water separation secondary sedimentation tank section.

[0013] The biological deodorization section includes an internal biological deodorization packing layer, a biological deodorization section spraying facility above the biological deodorization packing layer, and an exhaust outlet at the top.

[0014] The defoaming and demisting entrainment section includes an internal defoaming and demisting filler layer and a wastewater inlet spraying facility located above the defoaming and demisting filler layer.

[0015] The first biological reaction section includes a reflux distribution pipe for the nitrification liquid and sludge mixture, and several first downcomers located below the reflux distribution pipe for the nitrification liquid and sludge mixture, which are completely isolated from the second biological reaction section by a first supporting base plate at the bottom.

[0016] Each of the first downcomers is used to transport the wastewater in the first biological reaction section to the second biological reaction section by siphon overflow.

[0017] The second biological reaction section is equipped with several second downcomers and microporous aeration devices corresponding to the outlet positions of all the second downcomers. It is completely isolated from the sludge-water separation secondary sedimentation tank section by the second support plate at the bottom, and the side wall is equipped with a nitrification liquid outlet.

[0018] A guide barrel is provided at the center of the secondary sedimentation tank section for mud-water separation, and an outlet weir is provided on the inner wall at the height of the guide barrel.

[0019] The guide bucket is connected to each of the second downcomers;

[0020] Each of the second downcomers is used to siphon and overflow the wastewater in the second biological reaction section to the guide tank.

[0021] Preferably, the biological deodorization section spraying facility obtains water from the defoaming washing inlet located on the side wall of the biological deodorization section as defoaming washing water;

[0022] The wastewater inlet spraying facility obtains wastewater through a wastewater inlet located on the side wall of the defoaming and demisting entrainment section and sprays it onto the defoaming and demisting packing layer.

[0023] The nitrification liquid and sludge mixture return water distribution pipe obtains the nitrification liquid and sludge mixture return liquid through the nitrification liquid and sludge mixture return liquid inlet set on the side wall of the first biological reaction section;

[0024] Within the second bioreactor section, a first exhaust pipe is provided between the first supporting base plate and the upper side wall of the second bioreactor section, connecting the first bioreactor section with the outside.

[0025] The nitration liquid outlet is connected to a nitration liquid return pump to extract the nitration liquid;

[0026] A defoaming baffle for nitrification liquid is provided in the second bioreactor section corresponding to the outlet position of the nitrification liquid;

[0027] The microporous aeration device obtains air through an air inlet pipe installed in the second biological reaction section;

[0028] Within the sludge-water separation secondary sedimentation tank section, a second drain pipe is provided between the second supporting bottom plate and the upper side wall of the sludge-water separation secondary sedimentation tank section, connecting the second biological reaction section with the outside.

[0029] The bottom of the outlet weir and the side wall of the secondary sedimentation tank section for mud-water separation are provided with a third drain pipe for discharging to the outside.

[0030] The bottom of the sludge-water separation secondary sedimentation tank section is equipped with a sludge return pump interface and a secondary sedimentation tank drain outlet.

[0031] More preferably, the nitrification liquid and sludge mixture reflux inlet is connected to the nitrification liquid reflux pump and the sludge pump installed at the outlet of the secondary sedimentation tank through a pipeline to obtain the nitrification liquid and sludge mixture reflux liquid.

[0032] Preferably, the second support base plate at the top of the sludge-water separation secondary sedimentation tank section is provided with a first pressure balance pipe extending upward to the top of the biological deodorization section spray facility;

[0033] The first support base plate at the top of the second biological reaction section is provided with several second pressure balance pipes that extend upward to the top of the return water distribution pipe of the nitrification liquid and sludge mixture.

[0034] Preferably, each of the first downcomer and each of the second downcomer is equipped with a downcomer vacuum breaking device, which can ensure normal maintenance.

[0035] Both the first and second bioreactor sections are equipped with dissolved oxygen meters and pH meters;

[0036] The probe of each of the dissolved oxygen meters and each of the pH meters is inserted from the side wall of the corresponding first bioreactor section or the corresponding second bioreactor section;

[0037] The second biological reaction section is also equipped with a sludge concentration meter;

[0038] The sludge concentration meter probes are all inserted from the side wall of the second bioreactor section.

[0039] Preferably, the sidewalls of the biological deodorization section near the upper end, the sidewalls of the defoaming and demisting section near the upper end, the sidewalls of the first biological reaction section near the upper and lower ends, the sidewalls of the second biological reaction section near the upper and lower ends, and the sidewalls of the sludge-water separation secondary sedimentation tank section near the upper end are all provided with independent inspection and observation holes.

[0040] This invention also provides a method for using a vertical integrated AO bioreactor, including the following steps:

[0041] Step 1: Sewage is sent from the sewage inlet into the sewage inlet spraying facility for spraying;

[0042] During the execution of step 1, the sewage sprayed from the sewage inlet spraying facility falls onto the defoaming and demisting packing layer to wash and defoam the rising bubbles, and then falls into the first biological reaction section to undergo anoxic denitrification reaction with the nitrification liquid and sludge mixture return liquid, and then enters the second biological reaction section through the first downcomer siphon.

[0043] In the second biological reaction section, the mixed liquid siphoned in is supplied with oxygen or air through the microporous aeration device to carry out aerobic biochemical reactions, removing pollutants including COD and ammonia nitrogen, and then enters the sludge-water separation secondary sedimentation tank section through the second downcomer, where separation is achieved, and the wastewater is discharged through the effluent weir and the third drain pipe.

[0044] Step 2: The microporous aeration device provides oxygen or air. Unreacted gas and inert gas enter the defoaming and demisting packing layer through the second pressure balance pipe. After the defoaming and demisting packing layer removes any possible entrained foam, the gas enters the biological deodorizing packing layer to remove odor and other harmful gases, and is then discharged through the exhaust outlet.

[0045] Step 3: By using the external sludge pump installed at the outlet of the secondary sedimentation tank and the nitrification liquid return pump at the outlet of the nitrification liquid, the nitrification liquid and sludge are sent into the first biological reaction section to form denitrification and sludge recycling, thereby achieving continuous production.

[0046] The beneficial effects of this invention are:

[0047] This invention has made scientific and reasonable considerations and organically combined factors such as mechanical utilization, floor space, automatic control, and physical properties of materials to achieve integrated treatment of sewage and waste gas.

[0048] This invention is extremely compact and saves a lot of space: by vertically stacking multiple process units that traditionally need to be deployed in a plane, it integrates them into a single tower, reducing the floor space by 50%-70%, making it particularly suitable for factories with limited land.

[0049] This invention is highly integrated and can be deployed quickly: the equipment is manufactured in the factory.

[0050] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0051] Figure 1 A schematic diagram of an embodiment of the present invention is shown. Detailed Implementation

[0052] Example: Figure 1 As shown, the vertical integrated AO bioreactor includes, from top to bottom, a biological deodorization section 1, a defoaming and demisting entrainment section 2, a first bioreactor section 3, a second bioreactor section 4, and a sludge-water separation secondary sedimentation tank section 5.

[0053] The biological deodorization section 1 includes a biological deodorization packing layer 1-2 installed inside, a biological deodorization section spraying facility 1-3 installed above the biological deodorization packing layer 1-2, and an exhaust outlet 1-1 installed at the top.

[0054] The defoaming and demisting entrainment section 2 includes a defoaming and demisting packing layer 2-1 installed inside, and a sewage inlet spraying facility 2-2 installed above the defoaming and demisting packing layer 2-1;

[0055] The first biological reaction section 3 includes a return water distribution pipe 3-1 for nitrified liquid and sludge mixture, and several first downcomer pipes 3-2 located below the return water distribution pipe 3-1 for nitrified liquid and sludge mixture. It is completely isolated from the second biological reaction section 4 by the first supporting base plate 6 at the bottom.

[0056] Each first downcomer 3-2 is used to transport the sewage in the first biological reaction section 3 to the second biological reaction section 4 by siphon overflow.

[0057] The second biological reaction section 4 is equipped with several second downcomers 4-1 and microporous aeration devices 4-2 corresponding to the outlet positions of all the second downcomers 4-1. It is completely isolated from the mud-water separation secondary sedimentation tank section 5 by the second support plate 8 at the bottom. The side wall is equipped with a nitrification liquid outlet 4-3.

[0058] A guide tube 5-1 is located at the center of the secondary sedimentation tank section 5 for mud-water separation, and an outlet weir 5-2 is located on the inner wall at the height of the guide tube 5-1.

[0059] The guide tube 5-1 is connected to each of the second downcomers 4-1;

[0060] Each second downcomer 4-1 is used to transport the sewage in the second biological reaction section 4 to the guide tank 5-1 by siphon overflow.

[0061] The defoaming and demisting section 2 of the present invention includes a sewage inlet spraying facility 2-2, which defoams the foam rising from the lower first biological reaction section 3 and the second biological reaction section 4. At the same time, a defoaming and demisting packing layer 2-1 is designed on the lower side of the sewage inlet spraying facility 2-2, which effectively eliminates the entrainment of mist and droplets. At the same time, the inlet water is used to perform preliminary washing of the exhaust gas.

[0062] The top of the first biological reaction section 3 is equipped with a return water distribution pipe 3-1 for the nitrification liquid and sludge mixture, so that the wastewater sprayed down from the top can be fully mixed with the nitrification liquid and sludge before entering the first biological reaction section 3 and flowing down together.

[0063] Wastewater enters the second biological reaction section 4 through the first downcomer 3-2 via siphon overflow.

[0064] After the mud-water mixture flows down to the second biological reaction section 4 and reacts with the air provided by the microporous aeration device 4-2 at its bottom, it enters the mud-water separation secondary sedimentation tank section 5 through the second downcomer 4-1.

[0065] The second biological reaction section 4 utilizes the microporous aeration device 4-2 and bottom siphon disturbance to achieve mud-water mixing and eliminate bottom mud accumulation, saving on mixers and energy consumption.

[0066] This invention includes a biological deodorizing packing layer 1-2, an antifoaming and demisting packing layer 2-1 to prevent foaming in the first biological reaction section 3 and the second biological reaction section 4, a first downcomer 3-2 and a second downcomer 4-1 to prevent short-flow and sludge accumulation at the bottom of the first biological reaction section 3 and the second biological reaction section 4, and a sludge-water separation secondary sedimentation tank section 5 to ensure normal water discharge. Based on functional requirements and the properties of the gas and liquid themselves, these components are organically combined from top to bottom to form an integrated tower. The pressurized air is effectively delivered to the microporous aeration device 4-2 by utilizing the air pressure of the aeration air pressurization. The upper sealed space effectively increases the partial pressure of oxygen in the biochemical system, increases dissolved oxygen, and prolongs the residence time of oxygen in the liquid.

[0067] The biological deodorization packing layer 1-2 and the defoaming and demisting packing layer 2-1 utilize the positive pressure on the liquid surface of the aerobic tank in the wastewater treatment system of the first biological reaction section 3 and the second biological reaction section 4 to achieve the normal operation of the exhaust gas treatment system without an induced draft fan, reduce equipment investment, and at the same time reduce the failure rate of the system's power equipment.

[0068] In some embodiments, the biological deodorization section spraying facility 1-3 obtains water from the defoaming washing inlet 1-4 located on the side wall of the biological deodorization section 1 as defoaming washing water;

[0069] Wastewater inlet spraying facility 2-2 receives wastewater through wastewater inlet 2-3 located on the side wall of defoaming and demisting entrainment section 2 and sprays it onto defoaming and demisting packing layer 2-1;

[0070] The nitrification liquid and sludge mixture return water distribution pipe 3-1 obtains the nitrification liquid and sludge mixture return liquid through the nitrification liquid and sludge mixture return liquid inlet 3-4 set on the side wall of the first biological reaction section 3;

[0071] Inside the second bioreactor 4, a first vent pipe 3-3 is provided between the first supporting base plate 6 and the side wall of the second bioreactor 4 near the upper end, connecting the first bioreactor 3 with the outside.

[0072] Nitrification liquid outlet 4-3 is connected to a nitration liquid return pump to extract the nitration liquid;

[0073] A defoaming baffle 4-4 for nitrified liquid is installed at the nitrified liquid outlet 4-3 in the second biological reaction section 4.

[0074] In practical applications, a defoaming baffle 4-4 is designed to prevent the nitrification liquid from being evacuated by the nitrification liquid return pump.

[0075] The microporous aeration device 4-2 obtains air through the air inlet pipe 4-5 set in the second biological reaction section 4;

[0076] Within the secondary sedimentation tank section 5 of the mud-water separation, a second drain pipe 4-6 is provided between the second supporting bottom plate 8 and the upper side wall of the secondary sedimentation tank section 5, connecting the second biological reaction section 4 with the outside.

[0077] The bottom of the outlet weir 5-2 and the side wall of the secondary sedimentation tank section 5 for discharging water to the outside are provided with a third drain pipe 5-3.

[0078] The bottom of the secondary sedimentation tank section 5 for sludge-water separation is equipped with a sludge return pump interface 5-3 and a secondary sedimentation tank drain outlet 5-4.

[0079] In some embodiments, the nitrification liquid and sludge mixture reflux inlet 3-4 is connected to the nitrification liquid reflux pump and the sludge pump located at the secondary sedimentation tank outlet 5-4 via a pipeline to obtain the nitrification liquid and sludge mixture reflux.

[0080] In some embodiments, the second support base plate 8 at the top of the sludge-water separation secondary sedimentation tank section 5 is provided with a first pressure balancing pipe 5-6 extending upward to the spray facilities 1-3 of the biological deodorization section;

[0081] In practical applications, the first pressure balancing pipe 5-6 rising from the secondary sedimentation tank section 5 of the sludge-water separation effectively ensures the pressure balance in the lower secondary sedimentation tank section 5 of the sludge-water separation.

[0082] Moreover, the biological deodorization section 1 uses the positive pressure provided by the lower mud-water separation secondary sedimentation tank section 5 as the operating power to maintain long-term gas flow, that is, to utilize the excess gas that may be generated in the secondary sedimentation tank section.

[0083] The first support base plate 6 at the top of the second biological reaction section 4 is provided with several second pressure balance pipes 4-7 that extend upward to the top of the nitrification liquid and sludge mixture return water distribution pipe 3-1.

[0084] In some embodiments, each first downcomer 3-2 and each second downcomer 4-1 is provided with a downcomer vacuum breaking device 7; in practical applications, the downcomer vacuum breaking device 7 can ensure normal maintenance.

[0085] Both the first bioreactor 3 and the second bioreactor 4 are equipped with a dissolved oxygen meter 10 and a pH meter 11.

[0086] The probes of each dissolved oxygen meter 10 and each pH meter 11 are inserted from the side wall of the corresponding first bioreactor 3 or the corresponding second bioreactor 4.

[0087] The second biological reaction section 4 is also equipped with a sludge concentration meter 12;

[0088] The sludge concentration meter probes 12 were all inserted into the side wall of the second biological reaction section 4.

[0089] In some embodiments, independent inspection and observation holes 9 are provided on the sidewalls of the biological deodorization section 1 near the upper end, the sidewalls of the defoaming and demisting entrainment section 2 near the upper end, the sidewalls of the first biological reaction section 3 near the upper and lower ends, the sidewalls of the second biological reaction section 4 near the upper and lower ends, and the sidewalls of the mud-water separation secondary sedimentation tank section 5 near the upper end.

[0090] This invention also provides a method for using a vertical integrated AO bioreactor, including the following steps:

[0091] Step 1: Sewage is sent from sewage inlet 2-3 into sewage inlet spray facility 2-2 for spraying;

[0092] During the execution of step 1, the sewage sprayed from the sewage inlet spray facility 2-2 falls onto the defoaming and demisting packing layer 2-1 to wash and defoam the rising bubbles, and then falls into the first biological reaction section 3 to undergo anoxic denitrification reaction with the nitrification liquid and sludge mixture return liquid, and then enters the second biological reaction section 4 through the first downcomer 3-2.

[0093] In the second biological reaction section 4, the mixed liquor siphoned in is supplied with oxygen or air through the microporous aeration device 4-2 to carry out aerobic biochemical reactions, removing pollutants including COD and ammonia nitrogen, and then enters the sludge-water separation secondary sedimentation tank section 5 through the second downcomer 4-1. Separation is achieved in the sludge-water separation secondary sedimentation tank section 5, and the wastewater is discharged through the effluent weir 5-2 and the third drain pipe 5-3.

[0094] Step 2: The microporous aeration device 4-2 provides oxygen or air. Unreacted gas and inert gas enter the defoaming and demisting packing layer 2-1 through the second pressure balance pipe 4-7. After the defoaming and demisting packing layer 2-1 removes any possible entrained foam, it enters the biological deodorizing packing layer 1-2 to remove odor and other harmful gases, and is then discharged through the tail gas outlet 1-1.

[0095] Step 3: By using an external sludge pump installed at the secondary sedimentation tank outlet 5-4 and a nitrification liquid return pump at the nitrification liquid outlet 4-3, the nitrification liquid and sludge are sent into the first biological reaction section 3 to form denitrification and sludge recycling, thereby achieving continuous production.

[0096] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A vertical integrated AO bioreactor tower; characterized in that, The reaction tower includes, from top to bottom, a biological deodorization section (1), a defoaming and demisting section (2), a first biological reaction section (3), a second biological reaction section (4), and a sludge-water separation sedimentation tank section (5). The biological deodorization section (1) includes a biological deodorization packing layer (1-2) disposed inside, a biological deodorization section spraying facility (1-3) disposed above the biological deodorization packing layer (1-2), and an exhaust outlet (1-1) disposed at the top. The defoaming and demisting entrainment section (2) includes a defoaming and demisting packing layer (2-1) installed inside, and a sewage inlet spraying facility (2-2) installed above the defoaming and demisting packing layer (2-1). The first biological reaction section (3) includes a nitrification liquid and sludge mixture return water distribution pipe (3-1) and a plurality of first downcomer pipes (3-2) located below the nitrification liquid and sludge mixture return water distribution pipe (3-1), which are completely isolated from the second biological reaction section (4) by the first support plate (6) at the bottom. Each of the first downcomer pipes (3-2) is used to transport the sewage in the first biological reaction section (3) to the second biological reaction section (4) by siphon overflow. The second biological reaction section (4) is provided with several second downcomers (4-1) and microporous aeration devices (4-2) corresponding to the outlet positions of all the second downcomers (4-1). It is completely isolated from the mud-water separation secondary sedimentation tank section (5) by the second support plate (8) at the bottom, and the side wall is provided with a nitrification liquid outlet (4-3). The mud-water separation secondary sedimentation tank section (5) is provided with a guide bucket (5-1) at the center of the interior, and an outlet weir (5-2) is provided on the inner wall at the height of the guide bucket (5-1). The flow guide barrel (5-1) is connected to each of the second downcomers (4-1); Each of the second downcomer pipes (4-1) is used to transport the sewage in the second biological reaction section (4) to the guide bucket (5-1) by siphon overflow.

2. The vertical integrated AO bioreactor tower according to claim 1, wherein, The biological deodorization section spray facility (1-3) obtains water from the defoaming washing inlet (1-4) located on the side wall of the biological deodorization section (1) as defoaming washing water; The wastewater inlet spraying facility (2-2) receives wastewater through the wastewater inlet (2-3) located on the side wall of the defoaming and demisting entrainment section (2) and sprays it onto the defoaming and demisting packing layer (2-1); The nitrification liquid and sludge mixture return water distribution pipe (3-1) obtains the nitrification liquid and sludge mixture return liquid through the nitrification liquid and sludge mixture return liquid inlet (3-4) set on the side wall of the first biological reaction section (3); Inside the second bioreactor section (4), a first vent pipe (3-3) is provided between the first supporting base plate (6) and the side wall of the second bioreactor section (4) near the upper end, connecting the first bioreactor section (3) with the outside. The nitration liquid outlet (4-3) is connected to the nitration liquid return pump to extract the nitration liquid; A nitrification defoaming baffle (4-4) is provided in the second biological reaction section (4) at the position corresponding to the nitrification liquid outlet (4-3). The microporous aeration device (4-2) obtains air through the air inlet pipe (4-5) set in the second biological reaction section (4); Within the secondary sedimentation tank section (5) of the mud-water separation, a second drain pipe (4-6) is provided between the second supporting bottom plate (8) and the side wall of the secondary sedimentation tank section (5) near the upper end, connecting the second biological reaction section (4) with the outside. The bottom of the outlet weir (5-2) and the side wall of the mud-water separation secondary sedimentation tank section (5) are provided with a third drain pipe (5-3) for discharging to the outside. The bottom of the sludge-water separation secondary sedimentation tank section (5) is equipped with a sludge return pump interface (5-3) and a secondary sedimentation tank drain outlet (5-4).

3. The vertical integrated AO bioreactor according to claim 2, characterized in that, The nitrification liquid and sludge mixture reflux inlet (3-4) is connected to the nitrification liquid reflux pump and the sludge pump located at the secondary sedimentation tank outlet (5-4) through a pipeline to obtain the nitrification liquid and sludge mixture reflux liquid.

4. The vertical integrated AO bioreactor according to claim 1, characterized in that, The second support base plate (8) at the top of the mud-water separation secondary sedimentation tank section (5) is provided with a first pressure balance pipe (5-6) extending upward to the top of the biological deodorization section spray facility (1-3). The first support base plate (6) at the top of the second biological reaction section (4) is provided with several second pressure balance pipes (4-7) extending upward to the top of the nitrification liquid and sludge mixture return water distribution pipe (3-1).

5. The vertical integrated AO bioreactor according to claim 1, characterized in that, Each of the first downcomer (3-2) and each of the second downcomer (4-1) is equipped with a downcomer vacuum breaking device (7), which can ensure normal maintenance; Both the first bioreactor section (3) and the second bioreactor section (4) are equipped with a dissolved oxygen meter (10) and a pH meter (11). The probe of each of the dissolved oxygen meters (10) and each of the pH meters (11) is inserted from the side wall of the corresponding first bioreactor (3) or the corresponding second bioreactor (4); The second biological reaction section (4) is also equipped with a sludge concentration meter (12). The probes of the sludge concentration meter (12) are all inserted from the side wall of the second bioreactor section (4).

6. The vertical integrated AO bioreactor according to claim 1, characterized in that, The sidewalls of the biological deodorization section (1) near the upper end, the sidewalls of the defoaming and demisting section (2) near the upper end, the sidewalls of the first biological reaction section (3) near the upper and lower ends, the sidewalls of the second biological reaction section (4) near the upper and lower ends, and the sidewalls of the mud-water separation secondary sedimentation tank section (5) near the upper end are all provided with independent inspection and observation holes (9).

7. The method of using the vertical integrated AO bioreactor according to claim 2, characterized in that, Includes the following steps: Step 1: Sewage is sent from the sewage inlet (2-3) into the sewage inlet spraying facility (2-2) for spraying. During the execution of step 1, the sewage sprayed from the sewage inlet spray facility (2-2) falls onto the defoaming and demisting packing layer (2-1) to wash and defoam the rising bubbles, and then falls into the first biological reaction section (3) to carry out anoxic denitrification reaction with the nitrification liquid and sludge mixture return liquid, and then siphons into the second biological reaction section (4) through the first downcomer (3-2). In the second biological reaction section (4), the mixed liquid siphoned in is supplied with oxygen or air through the microporous aeration device (4-2) to carry out aerobic biochemical reaction, remove pollutants including COD and ammonia nitrogen, and enter the sludge-water separation secondary sedimentation tank section (5) through the second downcomer (4-1). Separation is achieved in the sludge-water separation secondary sedimentation tank section (5), and the wastewater is discharged through the effluent weir (5-2) and the third drain pipe (5-3). Step 2: The microporous aeration device (4-2) provides oxygen or air. Unreacted gas and inert gas enter the defoaming and demisting packing layer (2-1) through the second pressure balance pipe (4-7). After the defoaming and demisting packing layer (2-1) removes any possible entrained foam, the gas enters the biological deodorizing packing layer (1-2) to remove odor and other harmful gases, and is then discharged through the tail gas outlet (1-1). Step 3: By using the external sludge pump installed at the outlet (5-4) of the secondary sedimentation tank and the nitrification liquid return pump at the outlet (4-3) of the nitrification liquid, the nitrification liquid and sludge are sent into the first biological reaction section (3) to form denitrification and sludge circulation, thereby achieving continuous production.

Images