Integrated AO treatment device based on magnetic loading technology

Abstract

The invention discloses an integrated AO treatment device based on a magnetic loading process. The integrated AO treatment device comprises an integrated AO box body, the integrated AO box body is internally provided with an anaerobic chamber, an aerobic chamber and a settling chamber, and the anaerobic chamber, the aerobic chamber and the settling chamber are sequentially communicated through flow guide channels; a sewage inlet is formed in the upper part of the anaerobic chamber; an aeration device is arranged at the bottom of the aerobic chamber; the aeration device is connected with an external fan; a water outlet is formed in the upper part of the sedimentation tank. The integrated AO treatment device based on the magnetic loading technology can operate continuously, is not prone to blockage, is high in impact resistance, simple in structure, convenient to operate and small in occupied area, and has the efficient and stable treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to an integrated AO treatment device based on a magnetic loading process. Background Art

[0002] The activated sludge process is an aerobic biological treatment method for sewage and is the main method for wastewater biological treatment with activated sludge as the main body. In the activated sludge process, air is continuously introduced into the wastewater. After a certain period of time, sludge-like flocs are formed due to the reproduction of aerobic microorganisms. Microbial groups mainly composed of zoogloea inhabit thereon, which have a strong ability to adsorb and oxidize organic substances. The wastewater is mixed, stirred, and aerated with the activated sludge (microorganisms) to decompose the organic pollutants in the wastewater. The biological solids are then separated from the treated wastewater, and part of them can be refluxed to the aeration tank as needed.

[0003] A typical activated sludge process treatment system consists of an aeration tank, a sedimentation tank, a sludge reflux system, and a surplus sludge discharge system. The sewage and the refluxed activated sludge enter the aeration tank together to form a mixed liquor. The compressed air sent from the air compressor station enters the sewage in the form of fine bubbles through the air diffusion device laid at the bottom of the aeration tank, aiming to increase the dissolved oxygen content in the sewage and also keep the mixed liquor in a violently stirred state and in a suspended state. The dissolved oxygen, activated sludge, and sewage are mixed and in full contact with each other, enabling the activated sludge reaction to proceed normally.

[0004] The activated sludge process is commonly used for the treatment and disposal of sewage. In the traditional activated sludge process, the sludge concentration is mostly between 3000 - 5000 mg / L, and sludge bulking is likely to occur during operation. Once sludge bulking occurs, it will not only cause the sludge sedimentation performance to deteriorate sharply, making it difficult to separate the sludge from the water, but also seriously weaken the pollutant removal ability of the sewage treatment system, significantly reducing the treatment effect and the stability of the system operation, and further affecting the continuity and reliability of the entire sewage treatment process.

[0005] The AO process method is also called the anaerobic-aerobic process method. A (Anaerobic) is the anaerobic section for denitrification and phosphorus removal; O (Oxic) is the aerobic section for removing organic substances in the water. The superiority of the AO process method is that in addition to degrading organic pollutants, it also has a certain denitrification and phosphorus removal function. The anaerobic hydrolysis technology is used as the pretreatment of the activated sludge, so the AO method is an improved activated sludge method.

[0006] The AO process flow is as follows: After the sewage is collected by the drainage system, it enters the grid well of the sewage treatment station. After removing particulate impurities, it enters the regulation tank for homogenization and equalization. A pre-aeration system is set in the regulation tank. Then, through the signal transmitted by the liquid level controller, it is sent to the primary sedimentation tank by the lift pump for sedimentation. The wastewater flows by gravity to the A-level biological contact oxidation tank for acidification hydrolysis and nitrification denitrification to reduce the organic matter concentration and remove part of the ammonia nitrogen. Then it flows into the O-level biological contact oxidation tank for aerobic biochemical reaction. Most of the organic pollutants are degraded through biological oxidation and adsorption here. After the water flows by gravity to the secondary sedimentation tank for solid-liquid separation, the supernatant of the sedimentation tank flows into the disinfection tank. After killing the harmful bacteria in the water, it is discharged up to standard.

[0007] The traditional AO process requires the construction of an anaerobic tank and an anoxic tank separately, which not only increases the construction cost but also results in too large a floor area. In the current situation of increasingly tense land resources, its large-scale application is restricted.

[0008] Therefore, there is an urgent need to propose a new type of sewage treatment device that can improve the biochemical treatment efficiency, reduce the floor space, and save the treatment cost at the same time. Summary of the Invention

[0009] The present invention provides an integrated AO treatment device based on the magnetic loading process, which not only has high treatment efficiency and is easy to operate, but also can reduce the floor space and save the treatment cost.

[0010] The technical solution of the present invention is as follows:

[0011] An integrated AO treatment device based on the magnetic loading process includes an integrated AO box body;

[0012] An anaerobic chamber, an aerobic chamber, and a sedimentation chamber are arranged in the integrated AO box body, and the anaerobic chamber, the aerobic chamber, and the sedimentation chamber are sequentially connected through a diversion channel;

[0013] A sewage inlet is arranged at the upper part of the anaerobic chamber; an aeration device is arranged at the bottom of the aerobic chamber; the aeration device is connected to an external blower; the upper part of the sedimentation tank has a water outlet.

[0014] The water inlet is located at the upper part of the anaerobic chamber. The anaerobic chamber is connected to the aerobic chamber through a diversion channel at the upper part. The aerobic chamber is connected to the sedimentation chamber through a diversion channel at the upper part. The water outlet is located at the upper part of the sedimentation tank.

[0015] The integrated AO treatment device further includes a nitrification liquid reflux pump; one end of the nitrification liquid reflux pump is connected to the aerobic chamber through a nitrification liquid reflux pipeline, and the other end is connected to the anaerobic chamber to reflux the nitrification liquid in the aerobic chamber to the anaerobic chamber.

[0016] The described integrated AO treatment device further includes a sludge reflux pump, a high-shear machine, and a magnetic separator; one end of the sludge reflux pump is connected to the sludge outlet of the sedimentation chamber through a pipeline, and the other end is successively connected to the high-shear machine and the magnetic separator. The sludge discharge port of the magnetic separator is connected to the anaerobic chamber through a sludge reflux pipeline, and the magnetic outlet of the magnetic separator is connected to the aerobic tank.

[0017] The sludge in the sedimentation chamber is sent to the high-shear machine and the magnetic separator by the sludge reflux pump. After the activated sludge is sheared and broken by the high-shear machine, the high-gradient magnetic field of the magnetic separator is used to achieve magnetic sludge separation. The separated magnetic powder is recovered and added to the aerobic tank, and the separated sludge is refluxed to the anaerobic chamber to maintain the sludge concentration in the anaerobic chamber and ensure the continuous and stable progress of the biochemical reaction in the anaerobic chamber.

[0018] The described integrated AO treatment device further includes a surplus sludge pump; the pipeline of the sludge discharge port of the magnetic separator is divided into two branches, one branch is refluxed to the anaerobic chamber, and the other branch is connected to the surplus sludge pump.

[0019] One part of the sludge separated by the magnetic separator is refluxed to the anaerobic chamber, and the other part is discharged through the surplus sludge pump.

[0020] The described integrated AO treatment device further includes an on-line sludge concentration meter and an on-line dissolved oxygen meter; the on-line sludge concentration meter is used to detect the sludge concentration in the aerobic chamber, and the on-line dissolved oxygen meter is used to detect the dissolved oxygen concentration in the aerobic chamber.

[0021] The sludge concentration in the integrated AO treatment device is monitored in real time through the on-line sludge concentration meter, so as to adjust the operation parameters such as sludge reflux in time. The sludge concentration in the integrated AO treatment device is controlled to be 7 - 8 g / L.

[0022] The dissolved oxygen concentration in the aerobic chamber is monitored in real time through the on-line dissolved oxygen meter, which is convenient for adjusting the oxygen supply situation in the aerobic chamber and ensuring that the biochemical reaction in the aerobic chamber is in the best state. The dissolved oxygen concentration in the aerobic chamber is controlled to be 2 - 4 mg / L.

[0023] The described blower, nitrification liquid reflux pump, sludge reflux pump, and surplus sludge pump are installed on both sides of the integrated AO box body; the high-shear machine, magnetic separator, on-line sludge concentration meter, and on-line dissolved oxygen meter are installed on the top of the integrated AO box body.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The integrated AO treatment device based on the magnetic loading process of the present invention can operate continuously, is not easily blocked, and has strong impact resistance. The integrated AO treatment device based on the magnetic loading process of the present invention has a simple structure, convenient operation, and small floor area, and has an efficient and stable treatment effect. By combining the magnetic loading process with the integrated AO process, the biochemical treatment efficiency is improved, the efficient removal of pollutants in sewage is realized, and the treatment cost is saved at the same time, having good economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of an integrated AO treatment device based on the magnetic loading process;

[0027] Figure 2 is a plan view of an integrated AO treatment device based on the magnetic loading process.

[0028] Description of the reference numerals in the drawings: integrated AO box body 1, blower 2, nitrification liquid reflux pump 3, sludge reflux pump 4, high-shear machine 5, magnetic separator 6, excess sludge pump 7, on-line sludge concentration meter 8, on-line dissolved oxygen meter 9, water inlet A, water outlet B, nitrification liquid reflux pipeline C, sludge reflux pipeline D, sludge discharge pipeline E. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The present invention will be further described in detail below with reference to the drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention and do not limit it in any way.

[0030] An integrated AO treatment device based on the magnetic loading process, as Figure 1 and Figure 2 shown, includes an integrated AO box body 1, a blower 2, a nitrification liquid reflux pump 3, a sludge reflux pump 4, a high-shear machine 5, a magnetic separator 6, an excess sludge pump 7, an on-line sludge concentration meter 8, and an on-line dissolved oxygen meter 9.

[0031] Among them, the blower 2, the nitrification liquid reflux pump 3, the sludge reflux pump 4, and the excess sludge pump 7 are installed on both sides of the integrated AO box body 1, and the high-shear machine 5, the magnetic separator 6, the on-line sludge concentration meter 8, and the on-line dissolved oxygen meter 9 are installed on the top of the integrated AO box body 1.

[0032] An anaerobic chamber, an aerobic chamber, and a sedimentation chamber are arranged inside the integrated AO box body 1, and the anaerobic chamber, the aerobic chamber, and the sedimentation chamber are sequentially connected through a diversion channel. An aeration device is arranged at the bottom of the aerobic chamber. This integrated structural design greatly reduces the floor area. A water inlet A is arranged in the anaerobic chamber, and sewage enters the device from here to start the treatment process; a water outlet B is arranged in the sedimentation chamber, and the treated sewage is discharged from here.

[0033] The water inlet is located at the upper part of the anaerobic chamber. The diversion channel between the anaerobic chamber and the aerobic chamber is located at the upper part. The diversion channel between the aerobic chamber and the sedimentation chamber is located at the upper part. The water outlet is located at the upper part of the sedimentation tank.

[0034] The blower 2 is connected to the aeration device in the aerobic chamber through a pipeline, and is used to provide sufficient oxygen to the aerobic chamber to meet the metabolic needs of aerobic microorganisms and promote the smooth progress of the biochemical reaction in the aerobic chamber.

[0035] The nitrification liquid reflux pump 3 is connected to the aerobic chamber at one end through the nitrification liquid reflux pipeline C and to the anaerobic chamber at the other end. It can reflux the nitrification liquid to the anaerobic chamber to provide nitrate nitrogen for the denitrification reaction in the anaerobic chamber, so as to achieve efficient nitrogen removal. In addition, adjusting the reflux ratio can control the distribution of pollutants in each reaction zone and optimize the denitrification efficiency.

[0036] The sludge reflux pump 3 is connected to the sedimentation chamber at one end through a pipeline, and is connected to the high-shear machine 5 and the magnetic separator 6 in sequence at the other end, and then is connected to the anaerobic chamber through the sludge reflux pipeline D. The sludge in the sedimentation chamber is sent into the high-shear machine 5 and the magnetic separator 6 by the sludge reflux pump 3, and after magnetic separation, it is refluxed to the anaerobic chamber through the sludge reflux pipeline D to maintain the sludge concentration in the anaerobic chamber and ensure the continuous and stable progress of the biochemical reaction in the anaerobic chamber. The magnetic powder separated by the magnetic separator 6 is recovered and added into the aerobic chamber.

[0037] The excess sludge pump 7 is connected to the magnetic separator 6, and discharges the excess sludge separated by the magnetic separator 6 out of the device through the sludge discharge pipeline E.

[0038] Embodiment

[0039] The sewage enters the anaerobic chamber in the integrated AO box body 1 through the water inlet A to complete preliminary sedimentation. Under anaerobic conditions, microorganisms remove organic matter through hydrolysis, and denitrifying bacteria further achieve denitrification and nitrogen removal to improve the treatment efficiency.

[0040] The sewage treated by the anaerobic chamber enters the aerobic chamber. The sewage is aerated and oxygenated through the aeration device, and the sludge in the aerobic chamber is in a suspended fluidized state. The organic matter in the sewage is fully degraded and removed by aerobic bacteria, and the nitrogen pollutants are converted into nitrate nitrogen under the action of nitrifying bacteria. The nitrification liquid and part of the sludge in the middle and upper part are refluxed to the anaerobic chamber through the nitrification liquid reflux pump, and the nitrate nitrogen is converted into nitrogen gas under the action of denitrifying bacteria to achieve nitrogen removal.

[0041] After sufficient degradation and nitrification reactions, the sewage enters the sedimentation chamber for sedimentation. The sludge in the sedimentation chamber is sent to a high-shear machine and a magnetic separator by a sludge reflux pump. After the activated sludge is sheared and broken by the high-shear machine, the high-gradient magnetic field of the magnetic separator is used to achieve magnetic sludge separation. The separated magnetic powder is recovered and added to the aerobic tank. Part of the separated sludge is refluxed to the anaerobic chamber to maintain the sludge concentration in the anaerobic chamber and ensure the continuous and stable progress of the biochemical reaction in the anaerobic chamber. The remaining sludge is discharged through the excess sludge pump.

[0042] The above-described embodiments have detailed the technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, supplements, equivalent replacements, etc. made within the scope of the principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated AO treatment device based on a magnetic loading process, characterized in that It includes an integrated AO box body; An anaerobic chamber, an aerobic chamber and a sedimentation chamber are arranged in the integrated AO box body, and the anaerobic chamber, the aerobic chamber and the sedimentation chamber are sequentially connected through a diversion channel; An inlet is provided at the upper part of the anaerobic chamber; an aeration device is provided at the bottom of the aerobic chamber; the aeration device is connected to an external blower; an outlet is provided at the upper part of the sedimentation tank.

2. The integrated AO treatment device based on the magnetic loading process according to claim 1, wherein, The inlet is located at the upper part of the anaerobic chamber. The anaerobic chamber is connected to the aerobic chamber through a diversion channel at the upper part. The aerobic chamber is connected to the sedimentation chamber through a diversion channel at the upper part. The outlet is located at the upper part of the sedimentation tank.

3. The integrated AO treatment device based on the magnetic loading process according to claim 1, characterized in that, The integrated AO treatment device further includes a nitrification liquid reflux pump; one end of the nitrification liquid reflux pump is connected to the aerobic chamber through a nitrification liquid reflux pipeline, and the other end is connected to the anaerobic chamber to reflux the nitrification liquid in the aerobic chamber to the anaerobic chamber.

4. The integrated AO treatment device based on the magnetic loading process according to claim 1, characterized in that The integrated AO treatment device further includes a sludge reflux pump, a high-shear machine and a magnetic separator; one end of the sludge reflux pump is connected to the sludge outlet of the sedimentation chamber through a pipeline, and the other end is sequentially connected to the high-shear machine and the magnetic separator. The sludge discharge port of the magnetic separator is connected to the anaerobic chamber through a sludge reflux pipeline, and the magnetic outlet of the magnetic separator is connected to the aerobic tank.

5. The integrated AO treatment device based on the magnetic loading process according to claim 1, wherein, The integrated AO treatment device further includes a surplus sludge pump; the pipeline of the sludge discharge port of the magnetic separator is divided into two branches, one branch refluxes to the anaerobic chamber, and the other branch is connected to the surplus sludge pump.

6. The integrated AO treatment device based on the magnetic loading process according to claim 1, characterized in that, The integrated AO treatment device further includes an on-line sludge concentration meter and an on-line dissolved oxygen meter; the on-line sludge concentration meter is used to detect the sludge concentration in the aerobic chamber, and the on-line dissolved oxygen meter is used to detect the dissolved oxygen concentration in the aerobic chamber.

7. The integrated AO treatment device based on the magnetic loading process according to claim 6, wherein, Control the sludge concentration in the integrated AO treatment device to be 7 - 8 g / L.

8. The integrated AO treatment device based on the magnetic loading process according to claim 6, wherein Control the dissolved oxygen concentration in the aerobic chamber to be 2 - 4 mg / L.

9. The integrated AO treatment device based on the magnetic loading process according to claim 4, wherein The high-shear machine and the magnetic separator are installed on the top of the integrated AO box body.

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