CN217947783U

CN217947783U - Anaerobic ammonia oxidation reactor

Info

Publication number: CN217947783U
Application number: CN202222177715.7U
Authority: CN
Inventors: 王蕾; 祁巧玲
Original assignee: Shanghai Qintai Environmental Technology Co ltd; Zhejiang Taizhou Jinyuan Environmental Technology Co ltd
Current assignee: Shanghai Qintai Environmental Technology Co ltd; Zhejiang Taizhou Jinyuan Environmental Technology Co ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2022-12-02
Anticipated expiration: 2032-08-18

Abstract

The utility model relates to an anaerobic ammonia oxidation reactor, this reactor includes reactor main part (1) and is located reactor main part (1): an aeration unit (2) for maintaining the dissolved oxygen level in the reactor; the water distribution unit (3) is used for uniformly distributing water in the reactor; a membrane biological reaction unit (4) for degrading pollutants in the reactor; the aeration unit (2) is positioned at the bottom in the reactor main body (1), and the water distribution unit (3) is positioned at the upper part in the reactor main body (1); anaerobic ammonia oxidation sludge (10) is also arranged in the reactor main body (1). Compared with the prior art, the utility model has the advantages of aeration resistance is little, energy-concerving and environment-protective, long service life, be convenient for routine maintenance and clearance.

Description

Anaerobic ammonia oxidation reactor

Technical Field

The utility model relates to a biological denitrification technical field, concretely relates to anaerobic ammonium oxidation reactor.

Background

The anaerobic ammonia oxidation is a novel biological denitrification technology taking the biochemical effect of anaerobic ammonia oxidizing bacteria as a core, is different from a denitrification process, needs fewer carbon sources and is lower in operation cost, but the anaerobic ammonia oxidizing bacteria have extremely low cell yield, grow very slowly and are sensitive to environmental conditions, so that the anaerobic ammonia oxidizing bacteria cannot be popularized and applied on a large scale.

The traditional anaerobic reactor is not resistant to biochemical impact, so anaerobic ammonium oxidation strain loss is easily formed; the anaerobic ammonia oxidation process needs to control the strict aeration intensity so as to prevent the formation of an aerobic system caused by over-aeration and the formation of nitrate caused by over-aeration, so that the anaerobic ammonia oxidation process enters another denitrification cycle, and the microporous aerator is easy to block and is difficult to clean along with the lapse of time. Therefore, a bioreactor which can combine the living habits of the anammox bacteria is needed to meet the various conditions of the anammox.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing the anaerobic ammonia oxidation reactor which has the advantages of small aeration resistance, energy conservation, environmental protection, long service life and convenient daily maintenance and cleaning.

The purpose of the utility model can be realized by the following technical proposal:

an anammox reactor comprising a reactor body and, within the reactor body:

the aeration unit is used for maintaining the dissolved oxygen degree in the reactor;

the water distribution unit is used for uniformly distributing water in the reactor;

the membrane biological reaction unit is used for degrading pollutants in the reactor;

the aeration unit is positioned at the bottom in the reactor main body, and the water distribution unit is positioned at the upper part in the reactor main body; anaerobic ammonia oxidation sludge is also arranged in the reactor main body.

Furthermore, the aeration unit comprises an aeration main pipe and a plurality of aeration pipes distributed on two sides of the aeration main pipe, and the aeration main pipe is connected with an aeration fan.

Furthermore, a sludge discharge port is arranged at the bottom of the aeration pipe, and an aeration large hole is arranged on the side of the aeration pipe. The size of the aeration macropore is smaller than that of the sludge discharge port. The aeration pipe adopts macroporous aeration instead of conventional microporous aeration, the macroporous aeration keeps certain concentration of dissolved oxygen, and excessive nitrate is not formed due to excessive aeration because formed bubbles are large. The smaller aeration macropores are arranged on the two sides of the aeration pipe, and the larger sludge discharge port is arranged at the bottom of the aeration pipe, so that biochemical sludge is prevented from accumulating in the aeration pipe, and the pollution blockage of the aeration pipe is reduced. The aeration pipe is arranged at the bottom of the reactor, and the aeration intensity is automatically controlled by installing an online dissolved oxygen probe in the reactor.

Furthermore, the water distribution unit comprises a main water distribution pipe and a plurality of water distribution pipes distributed on two sides of the main water distribution pipe, and the main water distribution pipe is connected with the water inlet pump.

Furthermore, the water distribution pipe is of a grid structure and is provided with a grid water outlet. The upper water distribution mode is adopted, inlet water is distributed to each area through the water distribution units, the water distribution pipes are of a grid structure and are connected to the main water distribution pipes through threads, the main water distribution pipes can be detached, and the water distribution pipes can be detached and cleaned regularly.

Further, the membrane biological reaction unit comprises an immersed filtering membrane, and the immersed filtering membrane is connected with the suction pump. The design of an immersed membrane bioreactor is adopted, the flow rate of the membrane is controlled by controlling a suction pump, an aerator in the system continuously aerates, and the concentration of dissolved oxygen in the system is maintained, so that the requirement of the anaerobic ammonia oxidation process on oxygen is ensured. At the same time, the aerator generates larger bubbles and plays a role of stirring and mixing. Is beneficial to the transmission of substances and promotes the biochemical development.

Further, the submerged filter membrane comprises a microfiltration membrane or an ultrafiltration membrane.

Further, the reactor also comprises a dissolved oxygen sensor and/or a liquid level sensor.

Further, the reactor is also provided with an exhaust port for exhausting.

Further, the reactor main body is in the shape of a cylinder or a tank body.

Compared with the prior art, the utility model has the advantages of it is following:

(1) The utility model discloses the anaerobic ammonium oxidation reactor of the design that combines membrane bioreactor utilizes membrane system can keep the continuous growth of anaerobic ammonium oxidation mud in the reactor, can not lead to the loss of mud because of strikeing. By utilizing the design of the large-hole aeration pipe group, large bubbles formed by large holes are beneficial to the mixing of sludge, larger oxygen supply is not needed as the conventional aerobic process, and the large size of the aeration pipe group is beneficial to reducing the aeration resistance, saving energy and protecting environment;

(2) Meanwhile, the small holes on the two sides of the utility model provide the oxygen required by the anaerobic ammonia oxidation process, and the large hole on the bottom ensures that the sludge can not be accumulated in the aeration pipe. The sludge is not easy to block due to the larger aperture. Does not need to be cleaned and replaced like microporous aeration. Meanwhile, the aerator pipe with higher material strength is selected, so that the service life of the aerator pipe is prolonged, and the maintenance is reduced;

(3) The utility model discloses a water distributor adopts can dismantle the form grid and is favorable to preventing great particulate matter to get into biochemical system, influences the normal operating of membrane system, and screw thread demountable installation is convenient for routine maintenance and washing. The top is provided with a water distribution device which is convenient for cleaning and maintaining a daily water distribution system.

Drawings

FIG. 1 is a view showing the structure of a main body of a reactor in the example;

FIG. 2 is a top view of the aeration unit in the example;

FIG. 3 is a bottom view of an aeration tube according to an embodiment;

FIG. 4 is a top view of the water distribution unit in the embodiment;

FIG. 5 is a schematic view of a water distribution pipe in the embodiment;

the reference numbers in the figures indicate: the anaerobic ammonia oxidation reactor comprises a reactor main body 1, anaerobic ammonia oxidation sludge 10, an exhaust port 11, an aeration unit 2, an aeration main pipe 20, an aeration pipe 21, an aeration large hole 211, a sludge discharge port 212, a water distribution unit 3, a water distribution main pipe 30, a water distribution pipe 31, a grid water outlet 310, a membrane bioreaction unit 4 and an immersed filter membrane 41.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

An anammox reactor, as shown in fig. 1, comprises a reactor body 1 and, inside the reactor body 1: an aeration unit 2 for maintaining the dissolved oxygen level in the reactor; the water distribution unit 3 is used for uniformly distributing water in the reactor; the membrane biological reaction unit 4 is used for degrading pollutants in the reactor; the aeration unit 2 is positioned at the bottom in the reactor main body 1, and the water distribution unit 3 is positioned at the upper part in the reactor main body 1; anaerobic ammonia oxidation sludge 10 is also arranged in the reactor main body 1. The reactor also includes a dissolved oxygen sensor and/or a level sensor. The reactor is also provided with a vent 11 for venting. The reactor main body 1 is cylindrical or a tank body.

As shown in fig. 2-3, the aeration unit 2 includes an aeration main pipe 20 and a plurality of aeration pipes 21 disposed on both sides of the aeration main pipe 20, and the aeration main pipe 20 is connected to an aeration fan. The bottom of the aeration pipe 21 is provided with a sludge discharge port 212, and the side of the aeration pipe 21 is provided with an aeration big hole 211. The size of the large aeration hole 211 is smaller than that of the sludge discharge port 212. The size of the large aeration pores 211 is: 2.0-5.0mm, and the bottom sludge discharge port 212 is 10-15mm. The macroporous aeration serves two purposes: firstly, the large bubbles generated by the large holes can effectively mix and stir, and secondly, the process does not need high aeration quantity and dissolved oxygen, only needs to provide partial oxygen, and is suitable for large hole aeration.

As shown in fig. 4-5, the water distribution unit 3 includes a main water distribution pipe 30 and a plurality of water distribution pipes 31 disposed on both sides of the main water distribution pipe 30, and the main water distribution pipe 30 is connected to the water inlet pump. The water distribution pipe 31 is of a grid structure and is provided with a grid water outlet 310.

The membrane bioreaction unit 4 comprises a submerged filter membrane 41, which submerged filter membrane 41 is connected to a suction pump. The submerged filter membrane 41 includes a microfiltration membrane or an ultrafiltration membrane.

Example 1

As shown in figure 1, the anaerobic ammonia oxidation reactor has the sludge concentration controlled between 10000-12000mg/L, the aeration pipe is made of UPVC perforated aeration, the membrane is a PVDF ultrafiltration membrane, and the membrane flux is as follows: 12LMH, membrane pore size: 0.1 μm. The hydraulic retention time was 10 hours. The dissolved oxygen is controlled between 0.5-1.0 mg/L. Mixing of the system is maintained by aeration. The membrane aeration is independent from the biochemical aeration. The reactor is of a tank body structure, and the top of the reactor is provided with an air outlet. The sewage is water distribution for biochemical produced water of landfill leachate, and the specific conditions are as follows:

serial number	Water intake parameters	Numerical values (mg/L)	Parameters of water discharge	Numerical value (mg/L)
					1	COD	297	COD	223
2	TN	271.3	TN	75.1
					3	NH ₃ -N	217.9	NH ₃ -N	25.7
4	NO ₃	42.3	NO ₃	47.8
					5	NO ₂	10.4	NO ₂	2.3

Example 2

As shown in figure 1, the anaerobic ammonia oxidation reactor has the sludge concentration controlled between 10000-12000mg/L, the aeration pipe is made of UPVC perforated aeration, the membrane is a PVDF ultrafiltration membrane, and the membrane flux is as follows: 12LMH, membrane pore size: 0.1 μm. The hydraulic retention time was 72 hours. The dissolved oxygen is controlled between 0.5-1.0 mg/L. Mixing of the system is maintained by aeration. The membrane aeration is independent from the biochemical aeration. The reactor is of a tank body structure, and the top of the reactor is provided with an air outlet. The sewage source is water distribution of landfill leachate, and the specific conditions are as follows:

serial number	Water intake parameters	Numerical values (mg/L)	Parameters of water discharge	Numerical value (mg/L)
					1	COD	11697	COD	8423
2	TN	2348	TN	1037
					3	NH ₃ -N	2254	NH ₃ -N	835.7
4	NO ₃	82.3	NO ₃	147.8
					5	NO ₂	1.4	NO ₂	2.3

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. An anammox reactor, characterized in that it comprises a reactor body (1) and, inside the reactor body (1):

an aeration unit (2) for maintaining the dissolved oxygen level in the reactor;

the water distribution unit (3) is used for uniformly distributing water in the reactor;

a membrane biological reaction unit (4) for degrading pollutants in the reactor;

the aeration unit (2) is positioned at the bottom in the reactor main body (1), and the water distribution unit (3) is positioned at the upper part in the reactor main body (1); anaerobic ammonia oxidation sludge (10) is also arranged in the reactor main body (1).

2. An anammox reactor according to claim 1, wherein the aeration unit (2) comprises a main aeration pipe (20) and a plurality of aeration pipes (21) disposed on both sides of the main aeration pipe (20), and the main aeration pipe (20) is connected to an aeration fan.

3. The anammox reactor according to claim 2, wherein the bottom of the aeration pipe (21) is provided with a sludge discharge port (212), and the side of the aeration pipe (21) is provided with an aeration macro-hole (211).

4. The anammox reactor according to claim 1, wherein the water distribution unit (3) comprises a main water distribution pipe (30) and a plurality of water distribution pipes (31) disposed on both sides of the main water distribution pipe (30), and the main water distribution pipe (30) is connected to a water inlet pump.

5. The anammox reactor according to claim 4 wherein the water distributor (31) is of a grid structure and is provided with a grid outlet (310).

6. An anammox reactor according to claim 1, wherein the membrane bioreactor unit (4) comprises a submerged filter membrane (41), the submerged filter membrane (41) being connected to a suction pump.

7. The anammox reactor according to claim 6, wherein the submerged filtration membrane (41) comprises a microfiltration membrane or an ultrafiltration membrane.

8. The anammox reactor according to claim 1, further comprising a dissolved oxygen sensor and/or a level sensor.

9. An anammox reactor according to claim 1, wherein the reactor is further provided with a gas outlet (11) for the exhaust gas.

10. The anammox reactor according to claim 1, wherein the reactor body (1) is in the shape of a cylinder or a tank.