CN219136539U - Sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation - Google Patents

Abstract

The application discloses a sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation aims at solving the technical problems that the device for comprehensively setting the aerobic granular sludge treatment and the anaerobic ammonia oxidation treatment in the prior art is poor in sewage treatment effect and low in treatment efficiency. The integrated device comprises a box body, wherein a pretreatment area, a first purification area, a second purification area and a water outlet reflux area which are sequentially communicated are arranged in the box body, and the pretreatment area is communicated with a water inlet pipe for accessing sewage; aerobic granular sludge for primary sewage purification is added in the first purification zone; a large amount of filling materials for secondary purification of sewage, which are internally embedded with anaerobic ammonia oxidation bacteria, are added in the second purification zone; the water outlet reflux zone is communicated with a water outlet pipe for discharging purified water. The sewage treatment device has the advantages that the aerobic granular sludge and the anaerobic ammonia oxidation bacteria are integrated into the same device, so that the sewage treatment effect and the sewage treatment efficiency can be effectively improved.

Description

Sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation

Technical Field

The application relates to the technical field of sewage treatment, in particular to a sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation.

Background

The sewage discharge pollutant has strict standard, and COD, TN, TP needs to be reduced from 50mg/L, 15mg/L, 0.5m/L to 40mg/L, 12mg/L and 0.4mg/L. Meanwhile, the sewage treatment industry is one of the ten previous energy consumption industries, and in the sewage treatment process, a chemical agent and physical aeration are required to be added into a biochemical tank so as to maintain normal metabolism of microorganisms and further remove nutrient substances of sewage. A great deal of energy consumption and medicine consumption are generated in the sewage treatment process, so that the sewage treatment cost is high.

In order to solve the problems of improved emission standard, high energy consumption, and the like, a new technology and a new operation mode are needed to carry out upgrading and consumption reduction. The core technology of the biochemical pool of most sewage treatment plants is an oxidation ditch and the traditional AAO, the technology occupies large area, the structure is reinforced concrete, the technology is mature but is limited by a mechanism (full nitrification-full denitrification), the treatment capacity is insufficient, and the technology transformation is limited. Traditional nitrogen and phosphorus removal mechanisms have not matched existing environmental requirements.

At present, the aerobic granular sludge and anaerobic ammonia oxidation technology is a recognized low-carbon efficient treatment technology, and compared with a traditional activated sludge system, the aerobic granular sludge has the characteristics of small occupied area, high-efficiency synchronous denitrification and dephosphorization, low ton water consumption and the like, and is being popularized worldwide as an emerging energy-saving efficient sewage treatment technology. Compared with the traditional nitrification and denitrification technology, the anaerobic ammonia oxidation technology can save 60% of aeration energy consumption and 100% of organic carbon source. In addition, anaerobic ammonia oxidation bacteria have long generation period, slow growth and easy sewage loss, and ammonia nitrogen and nitrite nitrogen are required to be provided as substrates, and generally sewage only contains ammonia nitrogen. The aerobic granular sludge culture can convert ammoniacal nitrogen into nitrite nitrogen, and the aerobic granular sludge culture based on an internal circulation mode is the fastest mode. The novel filler is used for embedding the anaerobic ammonia oxidation bacteria, so that the loss of the anaerobic ammonia oxidation bacteria can be obviously reduced.

However, the prior art lacks a device for comprehensively setting aerobic granular sludge treatment and anaerobic ammonia oxidation treatment, and cannot realize rapid completion of sewage advanced treatment. Therefore, an integrated sewage denitrification device based on aerobic granular sludge and anaerobic ammonia oxidation is urgently needed.

The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.

Disclosure of Invention

The inventors found through research that: the traditional sewage treatment process has the problems of difficult transformation, limited treatment capacity and higher energy consumption, and the mode of carrying out sewage advanced treatment by aerobic granular sludge and anaerobic ammonia oxidation bacteria lacks a suitable loading device, so that the treatment effect cannot be guaranteed and the treatment efficiency is extremely low, and the technical problems of poor treatment effect and low treatment efficiency can be effectively solved by utilizing the integrated device for carrying out twice treatment on sewage.

In view of at least one of the above technical problems, the present disclosure provides a sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation, in which the sewage treatment efficiency and the sewage treatment quality are effectively improved by integrating the aerobic granular sludge treatment and the anaerobic ammonia oxidation treatment into the device through the clear partition of the pretreatment, the primary purification and the secondary purification of the sewage in the tank.

According to one aspect of the disclosure, a sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation is provided, and comprises a box body, wherein a pretreatment area, a first purification area, a second purification area and a water outlet reflux area which are sequentially communicated are arranged in the box body;

the pretreatment area is communicated with a water inlet pipe for accessing sewage;

the first purification zone is filled with aerobic granular sludge for primary purification of sewage;

the second purification area is filled with a filler which is internally embedded with anaerobic ammonia oxidation bacteria and is used for secondary purification of sewage;

the water outlet reflux zone is communicated with a water outlet pipe for discharging purified water.

In some embodiments of the present disclosure, the pretreatment zone comprises an adjustment buffer zone, a filtration zone, and a sand settling zone, which are sequentially communicated;

a first partition plate for separating is arranged between the adjusting buffer zone and the filtering zone and is communicated with the filtering screen arranged at the bottom of the first partition plate;

a second partition plate for separating is arranged between the filtering area and the sand settling area, a flow hole is formed in the upper portion of the second partition plate, and a flow valve for controlling flow is arranged on the flow hole.

In some embodiments of the disclosure, two sides of the bottom of the sand settling zone are provided with sand collecting inclined plates, and sand collecting hoppers corresponding to the sand collecting inclined plates are arranged to collect settled sand in sewage;

the sand collecting hopper is connected with a mud discharging pipe for discharging sediment, and the mud discharging pipe is provided with a mud discharging pump.

In some embodiments of the disclosure, a third partition plate for separation is arranged between the sand settling zone and the first purifying zone, a water inlet hole is arranged on the third partition plate, and a water inlet valve for controlling water inlet flow is arranged on the water inlet hole;

the side part of the sand settling zone is communicated with the second purification zone through a bypass pipe, the side part of the sand settling zone is used for introducing part of pretreated sewage into the second purification zone to adjust the ratio of ammonia nitrogen to nitrate nitrogen in the second purification zone, and an electric valve for controlling on-off and a water stop valve for preventing backflow are arranged on the bypass pipe.

In some embodiments of the disclosure, a first aeration disc for providing aerobic environment and circulating power is paved at the bottom of the first purifying zone, and a first circulating baffle for realizing internal sewage circulation is arranged in the first purifying zone.

In some embodiments of the disclosure, a fourth partition plate is arranged between the first purification zone and the second purification zone, water passing holes are arranged on the fourth partition plate, and water passing valves for controlling water passing flow are arranged on the water passing holes;

the bottom of the second purifying area is paved with a second aeration disc for providing micro-oxygen environment and circulating power, and a second circulating baffle for realizing the internal circulation of sewage is arranged in the second purifying area.

In some embodiments of the present disclosure, the first aeration disc and the second aeration disc are each connected with a corresponding aeration blower for providing aeration power through an aeration pipe.

In some embodiments of the disclosure, the sludge discharge pipe and the aeration pipeline are arranged in a pipeline layer at the bottom of the box body;

the box body is also internally provided with a control room for installing the sludge pump and the aeration blower so as to be beneficial to the control operation of the device.

In some embodiments of the disclosure, a partition plate for partitioning is arranged between the second purification zone and the water outlet backflow zone, a water outlet hole for discharging water is arranged on the partition plate, and a water outlet valve for controlling water outlet flow is arranged on the water outlet hole;

the bottom of the water outlet reflux zone is provided with a subsurface flow reflux pump for refluxing sludge, and the subsurface flow reflux pump is communicated with the first purification zone through a sludge reflux pipe, so that the sludge in the water outlet reflux zone is refluxed to the first purification zone, and the recycling of the sludge is realized.

In some embodiments of the disclosure, a first control valve for controlling the inflow rate is arranged on the water inlet pipe; and a second control valve for controlling the total water outlet flow is arranged on the water outlet pipe.

One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:

1. the aerobic granular sludge and the anaerobic ammonia oxidizing bacteria are organically integrated in the same device to purify sewage twice, so that the sewage can be subjected to advanced treatment, the technical problem of poor treatment effect of the existing sewage treatment process is effectively solved, and the technical effect of improving the sewage treatment effect is further achieved.

2. The purification partition is scientifically and reasonably arranged in the device, the aerobic granular sludge is purified and the anaerobic ammonia oxidation treatment is integrated on the same equipment, so that the technical problem of low efficiency of the existing sewage treatment can be effectively solved, and the sewage treatment efficiency is further improved.

3. Compared with the sewage treatment device operated by the existing sewage treatment plant, the sewage treatment device has the advantages that the whole sewage treatment device can be prefabricated and assembled, the structure is simple, the capital cost and the construction period are reduced, meanwhile, the maintenance is easy, and the sewage treatment cost is greatly reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

FIG. 2 is a second schematic structural view of an embodiment of the present application.

FIG. 3 is a schematic diagram of a pretreatment area according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a first purifying zone and a second purifying zone according to an embodiment of the present application.

FIG. 5 is a schematic diagram illustrating a structure between the water outlet and the control chamber according to an embodiment of the present disclosure.

In each of the above figures, 1 is a box body, 2 is an adjustment buffer zone, 21 is a water inlet pipe, 22 is a first control valve, 23 is a first baffle plate, 24 is a filter screen, 3 is a filter zone, 34 is a second baffle plate, 4 is a sand sedimentation zone, 41 is a sand collecting hopper, 42 is a sludge discharge pipe, 43 is a bypass pipe, 44 is an electric valve, 45 is a water valve, 46 is a sand collecting inclined plate, 5 is a first purification zone, 51 is a first aeration disc, 52 is an aeration pipe, 53 is a first circulation baffle plate, 54 is a third baffle plate, 56 is a fourth baffle plate, 6 is a second purification zone, 61 is a second aeration disc, 62 is a second circulation baffle plate, 67 is a partition baffle plate, 7 is a water outlet backflow zone, 71 is a water outlet pipe, 72 is a second control valve, 73 is a submerged flow backflow pump, 74 is a sludge backflow pipe, 75 is a backflow valve, 8 is an operation room, 81 is an aeration blower, 82 is a sludge discharge pump, and 9 is a pipe layer.

Detailed Description

In the description of the present application, it should be understood that, if the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. are referred to, the orientation or positional relationship indicated based on the drawings are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Reference to "first," "second," etc. in this application is for distinguishing between the objects described and not necessarily for any sequential or technical purpose. Reference to "connected" and "coupled" in this application includes both direct and indirect connections (couplings), unless specifically stated otherwise.

The unit modules, components, structures, mechanisms, sensors, and other devices according to the following examples are commercially available products unless otherwise specified.

The utility model provides a sewage denitrification integrated device based on good oxygen granule mud and anaerobic ammonia oxidation has solved that traditional sewage treatment technology exists transformation difficulty, throughput is limited, the higher problem of energy consumption, utilizes good oxygen granule mud and anaerobic ammonia oxidation fungus to carry out twice to sewage and then improves the treatment effect and the treatment effeciency of sewage through integrated device.

The technical scheme in this application embodiment is for solving the above-mentioned technical problem that treatment effect is poor and treatment efficiency is low, and the overall thinking is as follows: partitioning is carried out in the box body, and a pretreatment area, a first purification area, a second purification area and a water outlet backflow area which are sequentially communicated are arranged in the box body; the pretreatment area is communicated with a water inlet pipe for accessing sewage; aerobic granular sludge for primary sewage purification is added in the first purification zone; a large amount of filling materials for secondary purification of sewage, which are internally embedded with anaerobic ammonia oxidation bacteria, are added in the second purification zone; the water outlet reflux zone is communicated with a water outlet pipe for discharging purified water.

The pretreatment area comprises an adjusting buffer area, a filtering area and a sand settling area which are sequentially communicated; a first partition plate for partitioning is arranged between the adjusting buffer zone and the filtering zone and is communicated with the filtering screen arranged at the bottom of the first partition plate; a second partition plate for partitioning is arranged between the filtering area and the sand settling area, a flow hole is formed in the upper portion of the second partition plate, and a flow valve for controlling flow is arranged on the flow hole.

The two sides of the bottom of the sand settling zone are provided with sand collecting inclined plates, and sand collecting hoppers corresponding to the sand collecting inclined plates are arranged to collect settled sand in sewage; the sand collecting hopper is connected with a mud discharging pipe for discharging sediment, and the mud discharging pipe is provided with a mud discharging pump.

The sewage is pretreated by the pretreatment area to remove sediment and larger impurities in the sewage, and the sewage is deeply treated by aerobic granular sludge and anaerobic ammonia oxidizing bacteria in the first purification area and the second purification area respectively, so that the sewage treatment effect and the sewage treatment efficiency are improved.

For better understanding of the technical solutions of the present application, the following detailed description will refer to the accompanying drawings and specific embodiments.

Example 1

The embodiment discloses a sewage denitrification integrated device based on aerobic granular sludge and anaerobic ammonia oxidation, which is shown in fig. 1 and 2, and comprises a box body 1, wherein a pretreatment area, a first purification area 5, a second purification area 6 and a water outlet backflow area 7 which are sequentially communicated are arranged in the box body 1; the pretreatment area is communicated with a water inlet pipe 21 for accessing sewage; aerobic granular sludge for primary sewage purification is added in the first purification zone 5; a filler for secondary purification of sewage, in which a large amount of anaerobic ammonia oxidizing bacteria are embedded, is added into the second purification zone 6; the water outlet reflux zone 7 is communicated with a water outlet pipe 71 for discharging purified water, sewage enters the pretreatment zone for pretreatment through the water inlet pipe 21, the pretreated sewage can remove larger impurities such as silt in the sewage, the pretreated sewage enters the first purification zone 5 for primary purification by aerobic granular sludge therein, then enters the second purification zone 6 for secondary purification by packing embedded with a large amount of anaerobic ammonia oxidizing bacteria therein, and after deep denitrification is completed, the sewage flows back the residual sludge through the water outlet reflux zone 7 and is discharged through the water outlet pipe 71. In addition, the water inlet pipe 21 is provided with a first control valve 22 for controlling the water inlet flow; the outlet pipe 71 is provided with a second control valve 72 for controlling the total outlet flow.

Further, as shown in fig. 3, the pretreatment area comprises an adjusting buffer area 2, a filtering area 3 and a sand settling area 4 which are sequentially communicated; the first partition board 23 used for separating is arranged between the adjusting buffer zone 2 and the filtering zone 3, and is communicated with the filtering screen 24 arranged at the bottom of the first partition board 23, the adjusting buffer zone 2 is communicated with the water inlet pipe 21, and sewage enters the adjusting buffer zone 2, and enters the filtering zone 3 after larger impurities are filtered out by the filtering screen 24 arranged at the lower part of the first partition board 23.

A second partition 34 for separating is arranged between the filtering area 3 and the sand settling area 4, a flow hole is arranged at the upper part of the second partition 34, a flow valve for controlling flow is arranged on the flow hole, and sewage after larger impurities are filtered by the filter screen 24 enters the filtering area 3 and flows into the sand settling area 4 for sand settling through the flow hole on the second partition 34.

Further, two sides of the bottom of the sand sedimentation area 4 are provided with sand collecting inclined plates 46, and sand collecting hoppers 41 corresponding to the sand collecting inclined plates 46 are arranged to collect sand sedimentation in sewage; further, a sludge discharge pipe 42 for discharging the sludge is connected to the sand collecting hopper 41, the sludge discharge pipe 42 is provided with a sludge discharge pump 82, settled sand can be collected into the sand collecting hopper 41 through the sand collecting inclined plate 46, and the sludge is discharged through the sludge discharge pipe 42 by the sludge discharge pump 82.

Further, a third partition board 54 for separation is arranged between the sand settling zone 4 and the first purifying zone 5, a water inlet hole is arranged on the third partition board 54, a water inlet valve for controlling water inlet flow is arranged on the water inlet hole, and the pretreated sewage removes larger impurities and enters the first purifying zone 5 through the water inlet hole for primary purification;

in addition, the side part of the sand settling zone 4 is communicated with the second purifying zone 6 through a bypass pipe 43, so as to be used for introducing part of pretreated sewage into the second purifying zone 6 to provide substrate for the filler, and an electric valve 44 for controlling circulation and a water stop valve 45 for preventing backflow are arranged on the bypass pipe 43; because the ratio of ammonia nitrogen to nitrite nitrogen in the second purification zone 6 is uncertain, the ratio of ammonia nitrogen to nitrite nitrogen is adjusted by introducing the pretreated sewage in part of the sand settling zone 4 through the bypass pipe 43 so as to ensure the stability of the reaction in the second purification zone 6, and the water stop valve 45 can effectively prevent the purified water in the second purification zone 6 after the secondary treatment from flowing back to the sand settling zone 4 to reduce the treatment efficiency.

Further, as shown in fig. 4, a first aeration disc 51 for providing aerobic environment and circulating power is laid at the bottom of the first purifying zone 5, and the first aeration disc 51 is connected with a corresponding aeration blower 81 for providing aeration power through an aeration pipe 52. In addition, a first circulation baffle 53 for realizing the internal circulation of sewage is arranged in the first purification zone 5, the first circulation baffles 53 are arranged in pairs to be beneficial to the internal circulation of sewage, and the length of the first circulation baffles 53 is not easy to be too long so as to prevent from obstructing the internal circulation of sewage.

In addition, a fourth partition plate 56 is arranged between the first purification zone 5 and the second purification zone 6, water passing holes are formed in the fourth partition plate 56, and water passing valves for controlling water passing flow are arranged on the water passing holes; a second aeration disc 61 for providing micro-oxygen environment and circulating power is paved at the bottom of the second purification zone 6, and the second aeration disc 61 is connected with a corresponding aeration blower 81 for providing aeration power through an aeration pipeline 52. In addition, a second circulation baffle plate 62 for realizing the internal circulation of the sewage is arranged in the second purification zone 6, the second circulation baffle plates 62 are arranged in pairs so as to be beneficial to the internal circulation of the sewage, and the length of the second circulation baffle plate 62 is not easy to be too long so as to prevent from obstructing the internal circulation of the sewage. Because the first purification zone 5 and the second purification zone 6 have different oxygen demand, the aeration blowers 81 are used to supply air separately.

Further, the sludge discharge pipe 42 and the aeration pipe 52 are disposed in the pipe layer 9 at the bottom of the tank 1, as shown in fig. 5, and the control room 8 for installing the sludge discharge pump 82 and the aeration blower 81 is further disposed in the tank 1, so as to facilitate the control operation of the device. The arrangement can effectively utilize the space in the box body 1, and reduce the production cost.

A partition baffle plate 67 for partitioning is arranged between the second purification zone 6 and the water outlet backflow zone 7, a water outlet hole for water outlet is arranged on the partition baffle plate 67, and a water outlet valve for controlling water outlet flow is arranged on the water outlet hole; in addition, a subsurface flow reflux pump 73 for refluxing sludge is installed at the bottom of the effluent reflux zone 7, the subsurface flow reflux pump 73 is communicated with the first purification zone 5 through a sludge reflux pipe 74, so that the sludge in the effluent reflux zone 7 is refluxed to the first purification zone 5 to realize the recycling of the sludge, and a reflux control valve for controlling the circulation of a pipeline is arranged on the sludge reflux pipe 74.

In addition, the box 1 and each baffle in the box 1 in the application all adopt stainless steel materials, can realize prefabricated in advance, and on-site assembly. The sewage entering the device is first-stage treated sewage from a sewage treatment plant, the sewage contains organic matters and ammonia nitrogen, impurities in the sewage are intercepted by the pretreatment area, the abrasion of the subsequent process to the device can be effectively reduced, ammonia nitrogen in the sewage is oxidized into nitrite nitrogen by ammonia oxidizing bacteria in aerobic granular sludge through the first purification area 5, and simultaneously the organic matters in the sewage are degraded, so that the organic matters are prevented from entering the second purification area 6 to generate denitrification reaction, and although the ratio of the ammonia nitrogen to the nitrite nitrogen in the second purification area 6 is uncertain, the ratio of the ammonia nitrogen to the nitrite nitrogen can be adjusted by the pretreated sewage flowing in through the bypass pipe 43 between the sand settling area 4 and the second purification area 6, thereby reducing the use of carbon sources. After the sewage enters the second purification zone 6, anaerobic ammonia oxidation reaction is realized through a filler embedded with a large amount of anaerobic ammonia oxidation bacteria, and part of aerobic granular sludge in the first purification zone 5 also flows into the second purification zone 6 and forms a stable sludge film mixing system with the filler so as to be beneficial to secondary treatment of the sewage. After the treatment is finished, the purified water enters the water outlet reflux zone 7, the water is discharged through the water outlet pipe 71, the aerobic granular sludge in the water is refluxed to the first purification zone 5 through the sludge reflux pipe 74 by the undercurrent reflux pump 73, the reutilization of the aerobic granular sludge is realized, the resources are saved, and the cost is reduced.

While certain preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the utility model. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.

Claims (10)

1. The sewage denitrification integrated device based on the aerobic granular sludge and the anaerobic ammonia oxidation is characterized by comprising a box body, wherein a pretreatment area, a first purification area, a second purification area and a water outlet backflow area which are sequentially communicated are arranged in the box body;

the pretreatment area is communicated with a water inlet pipe for accessing sewage;

the first purification zone is filled with aerobic granular sludge for primary purification of sewage;

the second purification area is filled with a filler which is internally embedded with anaerobic ammonia oxidation bacteria and is used for secondary purification of sewage;

the water outlet reflux zone is communicated with a water outlet pipe for discharging purified water.

2. The integrated sewage denitrification device according to claim 1, wherein the pretreatment zone comprises an adjusting buffer zone, a filtering zone and a sand settling zone which are communicated in sequence;

a first partition plate for separating is arranged between the adjusting buffer zone and the filtering zone and is communicated with the filtering screen arranged at the bottom of the first partition plate;

a second partition plate for separating is arranged between the filtering area and the sand settling area, a flow hole is formed in the upper portion of the second partition plate, and a flow valve for controlling flow is arranged on the flow hole.

3. The integrated sewage denitrification device according to claim 2, wherein the two sides of the bottom of the sand sedimentation area are provided with sand collection sloping plates, and sand collection hoppers corresponding to the sand collection sloping plates are arranged to collect sand sedimentation in sewage;

the sand collecting hopper is connected with a mud discharging pipe for discharging sediment, and the mud discharging pipe is provided with a mud discharging pump.

4. The integrated sewage denitrification device according to claim 3, wherein a third partition plate for separation is arranged between the sand settling zone and the first purifying zone, a water inlet hole is arranged on the third partition plate, and a water inlet valve for controlling water inlet flow is arranged on the water inlet hole;

the side part of the sand settling zone is communicated with the second purification zone through a bypass pipe, the side part of the sand settling zone is used for introducing part of pretreated sewage into the second purification zone to adjust the ratio of ammonia nitrogen to nitrate nitrogen in the second purification zone, and an electric valve for controlling on-off and a water stop valve for preventing backflow are arranged on the bypass pipe.

5. The integrated sewage denitrification device according to claim 4, wherein a first aeration disc for providing aerobic environment and circulating power is laid at the bottom of the first purification zone, and a first circulating baffle for realizing internal sewage circulation is arranged in the first purification zone.

6. The integrated sewage denitrification device according to claim 5, wherein a fourth partition plate is arranged between the first purification area and the second purification area, water passing holes are formed in the fourth partition plate, and water passing valves for controlling water passing flow are arranged on the water passing holes;

the bottom of the second purifying area is paved with a second aeration disc for providing micro-oxygen environment and circulating power, and a second circulating baffle for realizing the internal circulation of sewage is arranged in the second purifying area.

7. The integrated sewage denitrification device according to claim 6, wherein the first aeration disc and the second aeration disc are connected with corresponding aeration blowers for providing aeration power through aeration pipelines.

8. The integrated sewage denitrification device according to claim 7, wherein the sludge discharge pipe and the aeration pipe are arranged in a pipeline layer at the bottom of the tank body;

the box body is also internally provided with a control room for installing the sludge pump and the aeration blower so as to be beneficial to the control operation of the device.

9. The integrated sewage denitrification device according to claim 1, wherein a partition plate for partitioning is arranged between the second purification area and the water outlet reflux area, a water outlet hole for discharging water is arranged on the partition plate, and a water outlet valve for controlling water outlet flow is arranged on the water outlet hole;

the bottom of the water outlet reflux zone is provided with a subsurface flow reflux pump for refluxing sludge, and the subsurface flow reflux pump is communicated with the first purification zone through a sludge reflux pipe, so that the sludge in the water outlet reflux zone is refluxed to the first purification zone, and the recycling of the sludge is realized.

10. The integrated sewage denitrification device according to claim 1, wherein the water inlet pipe is provided with a first control valve for controlling water inlet flow; and a second control valve for controlling the total water outlet flow is arranged on the water outlet pipe.

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