Aeration mounting structure in anaerobic ammonia oxidation biological tank and treatment method

Abstract

The invention belongs to the technical field of anaerobic ammonia oxidation biological method wastewater treatment, and particularly relates to an aeration mounting structure in an anaerobic ammonia oxidation biological tank and a treatment method.The aeration mounting structure comprises a water tank, the water tank is filled with biological filler, the end face of the water tank is connected with an aeration pipe, and the joint is sealed; a return pipe is arranged on one side of the pool. By arranging the biological filler, the aeration pipe and the return pipe, the aeration pipe arranged at the upper part of the water tank can greatly reduce the pressure of air introduced into the water tank, and the pressure of an aeration fan is reduced, so that the energy consumption is reduced; according to the mounting structure and the treatment method disclosed by the invention, the multi-stage operation of the original process is simplified, so that the treatment flow of the anaerobic ammonia oxidation process is realized in a set of water tank, the ammonia nitrogen nitrosation in a micro-aerobic state is realized, the anaerobic ammonia oxidation process in an anaerobic state is realized, the aeration rate is more convenient to control, and the treatment efficiency is improved. The device is suitable for operation of an anaerobic ammonia oxidation process, and can reduce energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of anaerobic ammonium oxidation biological wastewater treatment, and in particular to an aeration installation structure in an anaerobic ammonium oxidation biological pool and a treatment method. Background Art

[0002] The anaerobic ammonium oxidation biological treatment process is a sewage treatment process. Its principle is that under anaerobic conditions, the process uses ammonia as an electron donor and nitrate or nitrite as an electron acceptor to oxidize ammonia into nitrogen gas through biochemical reactions, thereby removing nitrogen pollutants in the water body. Compared with the traditional full nitrification process, the anaerobic ammonium oxidation process saves more than 60% of oxygen supply and carbon source, and has a significant energy-saving and emission reduction effect. It is often used for the treatment of wastewater with high concentrations of ammonia nitrogen. The implementation of the anaerobic ammonium oxidation process is divided into two steps. The first step is partial nitrification, which is to convert a small amount of ammonia nitrogen into nitrite nitrogen. Let nitrite nitrogen be used as an electron acceptor to directly convert ammonia nitrogen into nitrogen gas under anaerobic conditions to achieve rapid decomposition of ammonia nitrogen in wastewater. Therefore, the anaerobic ammonium oxidation reaction requires a small amount of oxygen to provide the first biological reaction at the front end, but at the same time, it is necessary to provide an anaerobic state to achieve the second stage biological reaction.

[0003] The prior art has the following defects or problems:

[0004] Existing anaerobic ammonium oxidation often uses two water tanks to achieve the process of nitrite and anaerobic ammonium oxidation. The front end is designed as a pre-aeration tank, and the back end is an anaerobic biological tank. It occupies a large area, and the equipment installation is complicated, and the workload of management and maintenance is increased.

[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides an aeration installation structure and treatment method in an anaerobic ammonium oxidation biological pond, which solves the existing problems.

[0007] To achieve the above object, the present invention provides the following technical solution: an aeration installation structure in an anaerobic ammonium oxidation biological pool, comprising:

[0008] A water pool, wherein the interior of the water pool is filled with biological fillers, and a maximum water level scale is provided at the top of the inner wall, an aeration pipe is connected to the end face of the water pool, and the connection is sealed, one end of the aeration pipe extends into the interior of the water pool, and a return pipe is provided on one side of the water pool.

[0009] In some embodiments, the biological filler is specifically anaerobic ammonium-oxidizing bacteria.

[0010] In some of the embodiments, the aeration pipe is fixedly installed in the upper middle part of the water pool, the aeration pipe performs nitrite reaction in the upper part of the water pool and is in a micro-aerobic state, the aeration pipe performs anaerobic ammonia oxidation reaction in the lower part of the water pool and is in an anaerobic state, and the aeration pipe is provided with aeration holes at the inner end of the water pool, and the aeration holes are arranged equidistantly.

[0011] In some of the embodiments, a control valve is fixedly installed on the upper end of the reflux pipe to control the operating state of the reflux pipe.

[0012] Another technical problem to be solved by the present invention is to provide an aeration installation and treatment method in an anaerobic ammonium oxidation biological pond, comprising the following steps:

[0013] Step 1: Test and adjust the aeration volume of the aeration pipe to control the reasonable oxygen content, then fix the aeration pipe in the middle and upper part of the pool and check the sealing of the connection between the two;

[0014] Step 2: Complete the installation of the return pipe and test whether the upper control valve can control the opening or closing of the return pipe;

[0015] Step 3: introducing the wastewater containing ammonia nitrogen into the water pool, before which the water pool is filled with biological fillers;

[0016] Step 4: After the wastewater enters the pool, it undergoes preliminary sedimentation and pretreatment to remove large suspended solids and some organic pollutants;

[0017] Step 5: During the treatment process in step 4, the air flow intensity released by the aeration pipe is adjusted by external air supply equipment. The aeration pipe is installed in the upper section of the pool to maintain a micro-aerobic state, and it is installed in the lower section of the pool to maintain an anaerobic state, ensuring that a suitable anoxic or anaerobic environment is formed in the pool, and at the same time, a trace amount of oxygen is provided in a specific area to support the growth of some aerobic bacteria;

[0018] Step 6: Ammonia nitrogen in the wastewater passes through the upper part of the aeration pipe, which can convert nitrate bacteria into nitrite. The wastewater containing ammonia nitrogen and nitrite ammonia flows back to the bottom of the biological pool through the reflux pipe again, and anaerobic ammonia oxidation reaction occurs when it contacts the ammonia oxidizing bacteria at the bottom of the pool to complete the overall process;

[0019] Step 7: After the anaerobic ammonium oxidation treatment, most of the nitrogen contained in the wastewater has been converted into nitrogen gas, and the nitrogen pollution has been effectively removed. The effluent is discharged after final sedimentation and filtration.

[0020] Furthermore, under the action of anaerobic ammonia-oxidizing bacteria in the pool, ammonia nitrogen reacts with nitrite to generate nitrogen and water. This process does not require additional oxygen to be provided from the outside, but relies on trace oxygen or gas reflux regulated in the pool to promote the reaction.

[0021] Compared with the prior art, the present invention provides an aeration installation structure and treatment method in an anaerobic ammonium oxidation biological pool, which has the following beneficial effects:

[0022] The aeration installation structure and treatment method in the anaerobic ammonium oxidation biological pool can greatly reduce the pressure of air entering the pool by setting biological fillers, aeration pipes and return pipes, and the aeration pipes installed on the upper part of the pool can reduce the pressure of the aeration fan, thereby saving energy consumption;

[0023] Ammonia nitrogen in wastewater is continuously degraded from the bottom, and the ammonia nitrogen concentration has been reduced in the upper part of the pool. The high ammonia nitrogen concentration in the lower wastewater can be continuously integrated through reflux, and the ammonia nitrogen in the wastewater is continuously degraded during the continuous degradation and circulation of the wastewater.

[0024] The installation structure and treatment method of the invention simplify the multi-stage operation of the original process, so that the anaerobic ammonia oxidation process can be implemented inside a set of water tanks, realizing the nitrite of ammonia nitrogen in a micro-aerobic state and the anaerobic ammonia oxidation process in an anaerobic state. Compared with the existing technology, the control of the aeration volume is more convenient through the aeration pipe, which is suitable for the operation of the anaerobic ammonia oxidation process and can reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the aeration installation structure in an anaerobic ammonium oxidation biological pond of the present invention.

[0026] In the figure: 1. Water pool; 2. Biological filler; 3. Maximum water level scale; 4. Aeration pipe; 5. Return pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1In this embodiment: an aeration installation structure in an anaerobic ammonia oxidation biological pool, a water pool 1, the interior of the water pool 1 is filled with biological filler 2, and a maximum water level scale 3 is provided on the top of the inner wall, an aeration pipe 4 is connected to the end face of the water pool 1, and the connection is sealed, one end of the aeration pipe 4 extends into the interior of the water pool 1, and a return pipe 5 is provided on one side of the water pool 1.

[0030] It is important to note that:

[0031] The biological filler 2 is specifically anaerobic ammonia-oxidizing bacteria;

[0032] The aeration pipe 4 is fixedly installed in the middle and upper part of the water pool 1. The aeration pipe 4 performs nitrite reaction in the upper part of the water pool 1 and is in a micro-aerobic state. The aeration pipe 4 performs anaerobic ammonia oxidation reaction in the lower part of the water pool 1 and is in an anaerobic state. The aeration pipe 4 is located at the inner end of the water pool 1 and is provided with aeration holes, and the aeration holes are arranged equidistantly.

[0033] A control valve is fixedly installed on the upper end of the return pipe 5 to control the operation state of the return pipe 5 .

[0034] Based on the above-mentioned aeration installation structure in an anaerobic ammonium oxidation biological pool, an aeration installation and treatment method in an anaerobic ammonium oxidation biological pool is proposed, comprising the following steps:

[0035] Step 1: Test and adjust the ventilation volume of the aeration pipe 4 to control the reasonable oxygen supply content, then fix the aeration pipe 4 to the middle and upper part of the pool 1 and check the sealing of the connection between the two;

[0036] Step 2: Complete the installation of the return pipe 5 and test whether the upper control valve can control the opening or closing of the return pipe 5;

[0037] Step 3: introducing the wastewater containing ammonia nitrogen into the water pool 1. Before this step, the water pool 1 is filled with biological filler 2;

[0038] Step 4: After the wastewater enters the pool, it undergoes preliminary sedimentation and pretreatment to remove large suspended solids and some organic pollutants;

[0039] Under the action of anaerobic ammonia-oxidizing bacteria in the pool, ammonia nitrogen reacts with nitrite to generate nitrogen gas and water. This process does not require additional oxygen from the outside, but relies on trace oxygen or gas reflux regulated in the pool to promote the reaction.

[0040] Step 5: During the treatment process in step 4, the air flow intensity released by the aeration pipe 4 is adjusted by an external air supply device. The aeration pipe 4 is installed in the upper section of the pool 1 to maintain a micro-aerobic state, and is installed in the lower section of the pool 1 to maintain an anaerobic state, ensuring that a suitable anoxic or anaerobic environment is formed in the pool, and at the same time, a trace amount of oxygen is provided in a specific area to support the growth of some aerobic bacteria;

[0041] Step 6: Ammonia nitrogen in the wastewater passes through the upper section of the aeration pipe 4, which can convert nitrate bacteria into nitrite. The wastewater containing ammonia nitrogen and nitrite ammonia flows back to the bottom of the biological pool through the reflux pipe 5 again, and when it contacts the ammonia oxidizing bacteria at the bottom of the pool 1, an anaerobic ammonia oxidation reaction occurs to complete the overall process;

[0042] Step 7: After the anaerobic ammonium oxidation treatment, most of the nitrogen contained in the wastewater has been converted into nitrogen gas, and the nitrogen pollution has been effectively removed. The effluent is discharged after final sedimentation and filtration.

[0043] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An aeration installation structure in an anaerobic ammonium oxidation biological pool, characterized in that: include: A water pool (1), wherein the water pool (1) is filled with biological filler (2), and a maximum water level scale (3) is provided at the top of the inner wall; an aeration pipe (4) is connected to the end face of the water pool (1), and the connection is sealed; one end of the aeration pipe (4) extends into the water pool (1); and a return pipe (5) is provided on one side of the water pool (1).

2. The aeration installation structure in an anaerobic ammonium oxidation biological pond according to claim 1, characterized in that: The biological filler (2) is specifically anaerobic ammonia-oxidizing bacteria.

3. The aeration installation structure in an anaerobic ammonium oxidation biological pond according to claim 1, characterized in that: The aeration pipe (4) is fixedly installed in the middle and upper part of the water pool (1); the aeration pipe (4) performs a nitrite reaction in the upper part of the water pool (1) and is in a micro-aerobic state; the aeration pipe (4) performs an anaerobic ammonia oxidation reaction in the lower part of the water pool (1) and is in an anaerobic state; the aeration pipe (4) is provided with aeration holes at the inner end of the water pool (1); and the aeration holes are arranged at equal distances.

4. The aeration installation structure in an anaerobic ammonium oxidation biological pond according to claim 1, characterized in that: A control valve is fixedly mounted on the upper end of the return pipe (5) to control the operating state of the return pipe (5).

5. A method for installing and treating aeration in an anaerobic ammonium oxidation biological pond, characterized in that: The steps include: Step 1: After testing the ventilation volume of the aeration pipe (4), adjust it to control the reasonable oxygen supply content, then fix the aeration pipe (4) to the middle and upper part of the pool (1), and check the sealing of the connection between the two; Step 2: After the installation of the return pipe (5) is completed, test whether the upper control valve can control the opening or closing of the return pipe (5); Step 3: introducing the wastewater containing ammonia nitrogen into the water pool (1), before which the water pool (1) is filled with biological filler (2); Step 4: After the wastewater enters the pool, it undergoes preliminary sedimentation and pretreatment to remove large suspended solids and some organic pollutants; Step 5: During the treatment process of step 4, the air flow intensity released by the aeration pipe (4) is adjusted by an external air supply device. The aeration pipe (4) is installed in the upper section of the pool (1) to maintain a micro-aerobic state, and is installed in the lower section of the pool (1) to maintain an anaerobic state, ensuring that a suitable anoxic or anaerobic environment is formed in the pool, and at the same time, a trace amount of oxygen is provided in a specific area to support the growth of some aerobic bacteria. The aeration installed in the upper part can greatly reduce the pressure of air entering the pool, thereby reducing the pressure of the aeration fan; Step 6: Ammonia nitrogen in the wastewater passes through the upper section of the aeration pipe (4), where nitrate bacteria can convert it into nitrite. The wastewater containing ammonia nitrogen and nitrite ammonia flows back to the bottom of the biological pool through the reflux pipe (5), and when it comes into contact with the ammonia oxidizing bacteria at the bottom of the pool (1), an anaerobic ammonia oxidation reaction occurs, completing the entire process. Step 7: After the anaerobic ammonium oxidation treatment, most of the nitrogen contained in the wastewater has been converted into nitrogen gas, and the nitrogen pollution has been effectively removed. The effluent is discharged after final sedimentation and filtration.

6. The aeration treatment method in an anaerobic ammonium oxidation biological pond according to claim 5, characterized in that: As described in step 4, under the action of anaerobic ammonia-oxidizing bacteria in the pool, ammonia nitrogen reacts with nitrite to generate nitrogen and water. This process does not require additional oxygen from the outside, but relies on trace oxygen or gas reflux regulated in the pool to promote the reaction.

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