Short-cut nitrification coupling anaerobic ammonia oxidation integrated equipment

Abstract

The utility model discloses short-cut nitrification coupling anaerobic ammonia oxidation integrated equipment which comprises an inner shell, a middle shell and an outer shell which are sequentially arranged from inside to outside, an aeration area and an aeration still water area are arranged in an inner cavity of the inner shell, the aeration still water area is located on the periphery of the aeration area, a separation barrel is arranged between the aeration still water area and the aeration area, and the separation barrel is located in the middle of the middle shell. The separation barrel is composed of an upper section structure, a middle section structure and a lower section structure, the lower section structure of the separation barrel is gradually shrunk in the direction from bottom to top, and the upper section structure of the separation barrel is gradually expanded in the direction from bottom to top; an aeration system and a water distribution system are sequentially mounted at the bottom of the aeration area from bottom to top, and aeration ports of the aeration system are alternately mounted upwards and downwards. According to the integrated equipment provided by the utility model, the influence of the sludge leakage phenomenon of the aeration tank on the sludge concentration can be reduced, the sludge age can be accurately controlled to achieve a better wastewater treatment effect, and the problem that the sludge is deposited at the bottom can be solved.

Description

Technical Field

[0001] The utility model relates to an integrated device for short - cut nitrification coupled with anaerobic ammonium oxidation, belonging to the technical field of sewage treatment. Background Art

[0002] The short - cut nitrification coupled with anaerobic ammonium oxidation process is a new type of wastewater treatment technology aimed at reducing the emission of pollutants such as nitrogen and phosphorus. This technology uses microbial metabolic reactions to remove nitrogen and phosphorus in wastewater.

[0003] Short - cut nitrification is a process in which, under anaerobic conditions, organic matter is used as an electron donor, and nitrate nitrogen is reduced to nitrogen gas through denitrification. As the organic matter degrades, aerobic bacteria cannot further require oxygen to oxidize the carbon source and nitrogen source fermentation products, while nitrifying bacteria can completely convert the substrate into ammonia nitrogen and nitrate nitrogen required for nitrification through aerobic denitrification. The anaerobic ammonium oxidation process is a process in which, under anaerobic conditions, ammonia is used as an electron donor, and nitrate or nitrite is used as an electron acceptor to oxidize ammonia into nitrogen gas.

[0004] The following technical problems generally exist in the short - cut nitrification coupled with anaerobic ammonium oxidation devices in the prior art: there is a problem of sludge leakage in the aeration tank, which will affect the sludge concentration, and it is difficult to accurately control the sludge age to achieve better wastewater treatment effects; due to the relatively small amount of aeration required in the aeration part, under low - air - volume operating conditions, some sludge will accumulate at the bottom of the aerator. Summary of the Utility Model

[0005] In view of the deficiencies in the background art, the utility model provides an integrated device for short - cut nitrification coupled with anaerobic ammonium oxidation, which can reduce the influence of sludge leakage in the aeration tank on the sludge concentration, can accurately control the sludge age to achieve better wastewater treatment effects, and can also solve the problem of sludge deposition at the bottom.

[0006] To solve the above - mentioned technical problems, the utility model adopts the following technical solutions:

[0007] An integrated device for short - cut nitrification coupled with anaerobic ammonium oxidation, comprising an inner shell, a middle shell and an outer shell arranged in sequence from the inside to the outside;

[0008] The inner cavity of the inner shell is provided with an aeration area and an aeration static water area. The aeration static water area is located on the periphery of the aeration area, and a partition cylinder is arranged between the aeration static water area and the aeration area;

[0009] The partition cylinder is composed of upper, middle and lower three - section structures. The lower - section structure of the partition cylinder is arranged in a gradually shrinking shape along the bottom - to - top direction, and the upper - section structure of the partition cylinder is arranged in a gradually expanding shape along the bottom - to - top direction;

[0010] At the bottom of the aeration zone, an aeration system and a water distribution system are installed successively from bottom to top, and the aeration ports of the aeration system are installed in an alternating manner of upward and downward.

[0011] Furthermore, a flow guide plate is provided at the bottom of the aeration still water area, the flow guide plate is arranged in a gradually shrinking shape along the direction from top to bottom, and a sludge return port is provided at the connection between the flow guide plate and the partition cylinder.

[0012] Furthermore, a sludge discharge pump is also installed at the bottom of the aeration still water area.

[0013] Furthermore, an aeration overflow port is provided at the top end of the inner housing.

[0014] Furthermore, an anaerobic overflow port is provided at a position near the top end of the outer housing, and the height of the anaerobic overflow port is less than the height of the aeration overflow port.

[0015] Furthermore, an anaerobic zone is formed between the outer wall of the inner housing and the inner wall of the outer housing, the middle housing is located in the middle of the anaerobic zone, and a circulation gap is provided at the bottom end of the middle housing.

[0016] Furthermore, a submersible stirring device is installed at the bottom of the anaerobic zone.

[0017] Furthermore, the height of the top end of the partition cylinder is less than the height of the top end of the inner housing.

[0018] Furthermore, the water distribution system is connected to the wastewater inlet.

[0019] Furthermore, pH and temperature sensors are installed in both the aeration zone and the anaerobic zone.

[0020] After the present utility model adopts the above technical solutions, compared with the prior art, it has the following advantages:

[0021] The wastewater that has completed short-cut nitrification treatment in the aeration zone enters the anaerobic zone through an overflow method. The still water area is set up by a partition board to achieve solid-liquid separation, thereby reducing the influence of sludge running on the sludge concentration in the aeration zone. In addition, a sludge discharge pump is provided to more accurately control the sludge age to achieve a better wastewater treatment effect;

[0022] The aeration ports of the aeration system are installed in an alternating manner of upward and downward, making the aeration without dead corners, improving the efficiency of mud-water mixing, avoiding the sludge accumulation phenomenon caused by low air volume operation conditions, preventing sludge deposition at the bottom, and improving the treatment efficiency;

[0023] The sludge decomposition in the anaerobic zone and the aeration zone is obvious, which is convenient for detailed regulation of the operating conditions of different sludges and helps to improve the sludge treatment capacity.

[0024] The present utility model will be described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0025] Figure 1 is the structural schematic diagram of the present utility model;

[0026] Figure 2 is the usage state diagram of the present utility model.

[0027] In the figure, 1 - inner shell, 2 - middle shell, 3 - outer shell, 4 - partition cylinder, 5 - aeration zone, 6 - aeration still water zone, 7 - anaerobic zone, 8 - aeration system, 9 - water distribution system, 10 - guide plate, 11 - sludge return port, 12 - sludge discharge pump, 13 - aeration overflow port, 14 - flow-through gap, 15 - submersible stirring device, 16 - anaerobic overflow port. Specific embodiments

[0028] For a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific embodiments of the present utility model will now be described with reference to the accompanying drawings.

[0029] As Figure 1 and Figure 2 collectively shown, the present utility model provides an integrated device for short-cut nitrification coupled with anaerobic ammonium oxidation, including an inner shell 1, a middle shell 2, and an outer shell 3 arranged in sequence from the inside to the outside.

[0030] The inner cavity of the inner shell 1 is provided with an aeration zone 5 and an aeration still water zone 6. The aeration still water zone 6 is located on the periphery of the aeration zone 5, and a partition cylinder 4 is provided between the aeration still water zone 6 and the aeration zone 5. The height of the top end of the partition cylinder 4 is less than the height of the top end of the inner shell 1.

[0031] The partition cylinder 4 is composed of upper, middle, and lower three-section structures. The lower section structure of the partition cylinder 4 is arranged in a gradually shrinking shape in the upward direction from the bottom, and the upper section structure of the partition cylinder 4 is arranged in a gradually expanding shape in the upward direction from the bottom.

[0032] The bottom of the aeration zone 5 is successively installed with an aeration system 8 and a water distribution system 9 from bottom to top. The aeration ports of the aeration system 8 are installed in an alternating up and down manner to avoid the phenomenon of sludge accumulation caused by low air volume operation, prevent sludge deposition at the bottom, and improve the treatment efficiency. The water distribution system 9 is connected to the wastewater inlet.

[0033] The bottom of the aeration still water zone 6 is provided with a guide plate 10. The guide plate 10 is arranged in a gradually shrinking shape in the downward direction from the top. A sludge return port 11 is provided at the connection between the guide plate 10 and the partition cylinder 4. The guide plate 10 can accelerate the flow velocity of the liquid outside the sludge return port 11, form a pressure difference, and enable the settled sludge in the aeration still water zone 6 to flow back to the aeration zone 5 by gravity.

[0034] A sludge discharge pump 12 is also installed at the bottom of the aeration still water zone 6. The sludge discharge pump 12 is used to precisely control the sludge age to achieve a better wastewater treatment effect.

[0035] An aeration overflow port 13 is provided at the top end of the inner housing 1.

[0036] An anaerobic zone 7 is formed between the outer wall of the inner housing 1 and the inner wall of the outer housing 3. The middle housing 2 is located in the middle of the anaerobic zone 7, and a circulation gap 14 is provided at the bottom end of the middle housing 2.

[0037] A submersible stirring device 15 is installed at the bottom of the anaerobic zone 7. The submersible stirring device 15 fully mixes the mixed wastewater with the anaerobic ammonium oxidation granular sludge. Ammonia nitrogen and nitrite nitrogen in the wastewater react to generate nitrogen gas and are discharged under the action of anaerobic ammonium oxidation. The remaining COD and a small amount of nitrate nitrogen in the wastewater are converted into nitrogen gas and discharged through denitrification.

[0038] An anaerobic overflow port 16 is provided near the top end of the outer housing 3, and the height of the anaerobic overflow port 16 is less than the height of the aeration overflow port 13.

[0039] pH and temperature sensors are installed in both the aeration zone 5 and the anaerobic zone 7.

[0040] The specific working principle of the present utility model:

[0041] The wastewater is added to the system from the bottom of the aeration zone 5 by the water distribution system 9. The wastewater that has completed the short-term nitrification treatment in the aeration zone 5 overflows to the anaerobic zone 7 through the aeration overflow port 13. The sludge settles to the bottom of the aeration static water area 6 and flows into the aeration zone 5 through the sludge return port 11 for aeration. The wastewater first flows downward and then upward in the anaerobic zone 7, and is fully mixed with the anaerobic ammonium oxidation granular sludge during the flow process. Ammonia nitrogen and nitrite nitrogen in the wastewater react to generate nitrogen gas and are discharged under the action of anaerobic ammonium oxidation. The remaining COD and a small amount of nitrate nitrogen in the wastewater are converted into nitrogen gas and discharged through denitrification. The treated wastewater is discharged from the system through the anaerobic overflow port 16.

[0042] The above is an example of the best implementation mode of the present utility model. The parts not described in detail are all common general knowledge of those of ordinary skill in the art. The protection scope of the present utility model is subject to the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.

Claims

1. A short-range nitrification coupled anaerobic ammonium oxidation integrated equipment, characterized in that: It comprises an inner shell (1), a middle shell (2) and an outer shell (3) which are arranged in sequence from the inside to the outside; The inner cavity of the inner shell (1) is provided with an aeration zone (5) and an aeration still water zone (6); the aeration still water zone (6) is located outside the aeration zone (5), and a partition tube (4) is provided between the aeration still water zone (6) and the aeration zone (5); The partition tube (4) is composed of three sections: upper, middle and lower. The lower section of the partition tube (4) is arranged in a gradually contracting shape from bottom to top, and the upper section of the partition tube (4) is arranged in a gradually expanding shape from bottom to top. An aeration system (8) and a water distribution system (9) are installed in sequence at the bottom of the aeration zone (5) from bottom to top, and the aeration ports of the aeration system (8) are installed in an upward and downward alternating manner.

2. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: A guide plate (10) is provided at the bottom of the aerated still water area (6), the guide plate (10) being arranged in a tapered shape from top to bottom, and a sludge return port (11) is provided at the connection between the guide plate (10) and the partition cylinder (4).

3. A short-range nitrification coupled anaerobic ammonium oxidation integrated device as claimed in claim 2, characterized in that: A mud pump (12) is also installed at the bottom of the aerated still water area (6).

4. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: An aeration overflow port (13) is provided at the top end of the inner shell (1).

5. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 4, characterized in that: The outer shell (3) is provided with an anaerobic overflow port (16) near the top thereof, and the height of the anaerobic overflow port (16) is smaller than the height of the aeration overflow port (13).

6. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: An anaerobic zone (7) is formed between the outer wall of the inner shell (1) and the inner wall of the outer shell (3), the middle shell (2) is located in the middle of the anaerobic zone (7), and a flow gap (14) is provided at the bottom end of the middle shell (2).

7. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 6, characterized in that: A submersible stirring device (15) is installed at the bottom of the anaerobic zone (7).

8. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: The height of the top end of the spacer (4) is smaller than the height of the top end of the inner shell (1).

9. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: The water distribution system (9) is connected to the wastewater inlet.

10. The short-range nitrification coupled anaerobic ammonium oxidation integrated equipment according to claim 1, characterized in that: pH and temperature sensors are installed in both the aeration zone (5) and the anaerobic zone (7).

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