Device for coupling anaerobic ammonia oxidation with MBBR (Moving Bed Biofilm Reactor) biochemical system

Abstract

The utility model discloses a device for coupling anaerobic ammonia oxidation with an MBBR (moving bed biofilm reactor) biochemical system, which comprises a reaction tank, a water inlet pipe, a water distribution system and a stirrer arranged in the middle of the reaction tank, and the interior of the reaction tank is sequentially divided into a solid-liquid separation area, a suspended filler area and a sludge area from top to bottom through an upper intercepting net and a lower intercepting net which are arranged in a crossing manner; the water inlet pipe is communicated with the water distribution system, a water inlet pump is arranged on the water inlet pipe, the suspended filler area is filled with MBBR suspended filler, and the water distribution system is arranged in the sludge area. According to the utility model, the suspended filler area is arranged in the reaction tank, and the filled MBBR suspended filler provides a carrier for growth and reproduction of anaerobic ammonium oxidation bacteria, so that the problem of low proliferation speed of the anaerobic ammonium oxidation bacteria is solved. In addition, a water distribution system is arranged at the bottom of the device, so that the problems of poor stirring effect and non-uniform solid-liquid mixing of equipment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, and particularly relates to a device for an anaerobic ammonia oxidation coupled with an MBBR biochemical system. Background Art

[0002] There are many industries in the field of industrial wastewater that involve high-ammonia-nitrogen wastewater, such as: breeding, slaughtering, food, brewing, papermaking, medicine, printing and dyeing and other industries. The traditional treatment process adopts anaerobic fermentation + AAO process, which has a long treatment process flow, high energy consumption, large floor area, and usually requires a large amount of carbon source to be added in the AAO process, and the treatment effect is poor. The anaerobic ammonia oxidation process for treating high-ammonia-nitrogen wastewater refers to an autotrophic reaction process in which anaerobic ammonia-oxidizing bacteria use NO2- as an electron acceptor and directly convert NH4+ into N2 under anoxic conditions. This treatment technology shortens the process route on the one hand, reduces the investment and floor area, and on the other hand, does not require the addition of carbon source, improving the economy. However, due to problems such as the low proliferation rate of anaerobic ammonia-oxidizing bacteria itself and the uneven solid-liquid mixing in the reaction tank, its wide application is restricted.

[0003] Chinese Patent with application number 202220824343.X discloses an anaerobic ammonia oxidation reactor, which is used to solve the problems that commonly used existing reactors generally have uneven stirring of the objects in the reaction tank, insufficient up-and-down contact of the objects in the reaction tank, low reaction efficiency of the anaerobic ammonia oxidation reactor, and solid deposition after the waste stands still. However, in actual use, there are still phenomena of uneven stirring and insufficient solid-liquid mixing.

[0004] Chinese Patent with application number 202322434605.9 discloses a device for treating high-total-nitrogen wastewater by anaerobic ammonia oxidation. By setting up and down transmission parts to drive the spray head to rotate while revolving, the water outlet height of the spray head is adjusted, so that the sewage sprayed by the spray head can contact the filler in a larger range, further improving the denitrification effect. However, the device structure is complex and the operation is inconvenient. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a device for an anaerobic ammonia oxidation coupled with an MBBR biochemical system, so as to solve the problems of low proliferation rate of anaerobic ammonia-oxidizing bacteria and uneven solid-liquid mixing.

[0006] The present utility model solves the above problems through the following technical means:

[0007] An apparatus for an anaerobic ammonium oxidation coupled with an MBBR biochemical system, comprising a reaction tank, a water inlet pipe, a water distribution system, and a stirrer disposed in the middle of the reaction tank. The reaction tank is divided into a solid-liquid separation zone, a suspended packing zone, and a sludge zone from top to bottom by an upper interception net and a lower interception net disposed across. The water inlet pipe is communicated with the water distribution system, and a water inlet pump is arranged on the water inlet pipe. The suspended packing zone is filled with MBBR suspended packing, and the water distribution system is arranged in the sludge zone.

[0008] Further, it further comprises a circulation pipeline, both ends of the circulation pipeline are respectively communicated with the suspended packing zone and the sludge zone, and a circulation pump and an electric valve are arranged on the circulation pipeline. The return flow is accurately controlled by the electric valve.

[0009] Further, a water outlet weir is arranged in the solid-liquid separation zone, and the water outlet weir is connected with a water outlet pipe.

[0010] Further, an air outlet is arranged at the top of the solid-liquid separation zone.

[0011] Further, the sludge zone is connected with a sludge discharge pipe. Gravity sludge discharge is carried out regularly according to the sludge situation.

[0012] Further, a water quality parameter monitor is installed on the reaction tank.

[0013] During operation, the influent water enters the water distribution system through the water inlet pump, and the upward flow velocity of the water distribution is controlled by the influent water flow. The upper and lower sides of the suspended packing zone are respectively provided with an upper interception net and a lower interception net to limit the MBBR suspended packing in the suspended packing zone. The stirrer controls the transverse disturbance of the water flow to ensure uniform solid-liquid mixing. The filled MBBR suspended packing provides a carrier for the growth of anaerobic ammonium oxidation bacteria.

[0014] The water outlet weir can adjust the water outlet height according to the influent ammonia nitrogen load.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The present utility model adopts a bottom precision water distribution system and middle stirring to control the uniformity of the solid-liquid phase inside the device, ensuring sufficient up-and-down contact of the fluid in the reaction tank, effectively solving the problem of static deposition of the solid phase, and improving the anaerobic ammonium oxidation efficiency.

[0017] 2. By arranging an MBBR suspended packing zone in the middle of the reaction tank, the present utility model provides a good carrier for the rapid growth of anaerobic ammonium oxidation bacteria, improves their growth and reproduction speed, greatly increases the concentration of anaerobic ammonium oxidation bacteria in the reaction tank, and effectively solves the problems of slow growth speed and low concentration of anaerobic ammonium oxidation bacteria. Description of the Drawings

[0018] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0019] Figure 1 Schematic diagram of a device for an anaerobic ammonium oxidation coupled with MBBR biochemical system according to a preferred embodiment of the present utility model.

[0020] In the figure: 1, reaction tank; 2, water inlet pipe; 3, water inlet pump; 4, water distribution system; 5, MBBR suspended packing; 6, agitator; 7, electric valve; 8, circulation pipeline; 9, circulation pump; 10, effluent weir; 11, effluent pipe; 12, upper interception net; 13, lower interception net; 14, sludge discharge pipe; 15, gas outlet; 16, water quality parameter monitor. Specific implementation manners

[0021] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present utility model will become more clearly defined. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] As Figure 1 shown, a device for an anaerobic ammonium oxidation coupled with MBBR biochemical system in this embodiment includes a reaction tank 1, a water inlet pipe 2, a circulation pipeline 8, a water distribution system 4, and an agitator 6 disposed in the middle of the reaction tank. The reaction tank is divided into a solid-liquid separation zone, a suspended packing zone, and a sludge zone from top to bottom by an upper interception net 12 and a lower interception net 13 which are horizontally arranged; the water inlet pipe is communicated with the water distribution system, and a water inlet pump 3 is disposed on the water inlet pipe 2. The suspended packing zone is filled with MBBR suspended packing 5, and the water distribution system is disposed in the sludge zone. Two ends of the circulation pipeline are respectively communicated with the upper part of the suspended packing zone and the sludge zone, and a circulation pump 9 and an electric valve 7 are disposed on the circulation pipeline. In this embodiment, the electric valve is disposed at the inlet and outlet of the circulation pump. The solid-liquid separation zone is provided with an effluent weir 10 and a gas outlet 15. The effluent weir is connected with an effluent pipe 11, and the effluent height of the effluent weir can be adjusted. The sludge zone is connected with a sludge discharge pipe 14. Gravity sludge discharge is carried out regularly according to the sludge condition. A water quality parameter monitor 16 is installed on the reaction tank.

[0023] The water flow flowing out from the water distribution system uniformly flows upward. The water distribution flow is controlled by controlling the water inlet flow rate to ensure the uniformity of the water inlet. The MBBR suspended packing 5 disposed in the middle area of the reaction tank provides a good place for the growth and aggregation of anaerobic ammonium oxidizing bacteria. An agitator 6 is disposed in the middle to keep the MBBR suspended packing in a fluidized state by controlling the stirring rate, and the packing is controlled in the suspended packing zone by the upper interception net 12 and the lower interception net 13. Under the combined action of the uniform water distribution of the water distribution system 4 and the agitation of the agitator 6, the fluid in the reaction tank is in full contact up and down, and the solid-liquid mixture is uniform. The upper part is the solid-liquid separation zone, and an adjustable effluent weir 10 is provided. Under the action of gravity, the sludge sinks, and the clear liquid overflows from the effluent weir 10 to the effluent pipe 11.

[0024] The working process of the device of an anaerobic ammonium oxidation coupled with MBBR biochemical system in this embodiment is as follows: Sewage is lifted from the water inlet pipe 2 to the water distribution system 4 by the water inlet pump 3 for uniform water distribution. The wastewater rises evenly from the bottom of the reaction tank and enters the suspended packing area, where the anaerobic ammonium oxidation reaction takes place. Under the action of anaerobic ammonium oxidation bacteria, NH4+ is directly converted into N2, and at the same time, the COD in the sewage is consumed as the nutrition for its own growth and reproduction. The treated sewage overflows from the effluent weir 10 to the outlet pipe 11, and the gas generated during the process is discharged from the gas outlet 15 at the top of the device.

[0025] During the working process of the system, the mud-water mixture above the MBBR suspended packing flows back to the sludge area through the circulation pipeline 8 under the pumping action of the circulation pump 9. According to the data of the water quality parameter monitor 16, the circulation return flow is accurately controlled by the electric valves at the inlet and outlet of the circulation pump, which improves the removal efficiency of ammonia nitrogen and also has a good improvement on the solid-liquid uniformity.

[0026] A sludge discharge pipe 14 is arranged at the bottom of the reaction tank 1, and the sludge deposited at the bottom of the system is regularly discharged externally by gravity.

[0027] To sum up, this application is a device of an anaerobic ammonium oxidation coupled with MBBR biochemical system, which is mainly applied to the treatment of industrial wastewater with high ammonia nitrogen. Through the water distribution system, MBBR suspended packing and circulation reflux, the rapid growth of anaerobic ammonium oxidation bacteria is realized, and it has the advantages of uniform solid-liquid mixing and high treatment efficiency.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An apparatus for an anaerobic ammonium oxidation coupled with MBBR biochemical system, characterized in that: It includes a reaction tank, a water inlet pipe, a water distribution system, and a stirrer arranged in the middle of the reaction tank. Inside the reaction tank, it is successively divided into a solid-liquid separation zone, a suspended packing zone, and a sludge zone from top to bottom by an upper intercepting net and a lower intercepting net arranged across; the water inlet pipe is communicated with the water distribution system, a water inlet pump is arranged on the water inlet pipe, the suspended packing zone is filled with MBBR suspended packing, and the water distribution system is arranged in the sludge zone.

2. The device of the anaerobic ammonium oxidation coupled with MBBR biochemical system according to claim 1, characterized in that: It further includes a circulation pipeline, both ends of the circulation pipeline are respectively communicated with the suspended packing zone and the sludge zone, and a circulation pump and an electric valve are arranged on the circulation pipeline.

3. The device of the anaerobic ammonium oxidation coupled with MBBR biochemical system according to claim 2, characterized in that: An effluent weir is arranged in the solid-liquid separation zone, and the effluent weir is connected with an effluent pipe.

4. The device of the anaerobic ammonium oxidation coupled with MBBR biochemical system according to claim 3, characterized in that: An air outlet is arranged at the top of the solid-liquid separation zone.

5. The device of the anaerobic ammonium oxidation coupled with MBBR biochemical system according to claim 4, characterized in that: The sludge zone is connected with a sludge discharge pipe.

6. The device of the anaerobic ammonium oxidation coupled with MBBR biochemical system according to claim 5, characterized in that: A water quality parameter monitor is installed on the reaction tank.

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