ECIS sewage treatment device capable of achieving sufficient aeration

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an ECIS sewage treatment device capable of realizing sufficient aeration, which comprises a treatment tank, a filter tank and a sewage discharge system which are arranged in sequence, a physicochemical and biochemical treatment unit is arranged in the treatment tank, the sewage is subjected to a denitrification and dephosphorization process by a physicochemical and biochemical treatment method in the physicochemical and biochemical treatment unit, and the physicochemical and biochemical treatment unit comprises an electrode assembly, an aeration system and a reflux system; the device is characterized in that microbial self-flocculation particles are put into the treatment tank; the aeration system comprises an aeration device which is arranged at the bottom of the treatment tank and can be independently controlled, the aeration device is provided with a pusher which can generate pushing force downwards, and the bottom of the treatment tank is a conical bottom of which the inclination angle is greater than 55 degrees. And the requirement of rapid sewage treatment in actual life cannot be met.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an ECIS sewage treatment device capable of achieving full aeration. Background Art

[0002] Sewage refers to the discharged water that has been polluted to a certain extent in the process of life and production and has lost its original use function. Direct discharge will cause certain harm to the environment, leading to the deterioration of water quality in other water bodies and soil pollution. Therefore, people will build sewage treatment plants in cities or factory areas to centrally treat the sewage from life or production before discharging it.

[0003] However, for some water users with small and scattered sewage volumes (such as highway service stations, frontier supply stations, small villages far from cities, etc.), it is very difficult to concentrate sewage, and each water user directly builds a small sewage treatment plant, which has a low cost-effectiveness because the sewage volume is too small. In order to solve this scattered sewage problem, engineers began to miniaturize the sewage treatment equipment of large sewage treatment plants, integrating anaerobic tanks, anoxic tanks, aerobic tanks, and sedimentation tanks into one device. For example, the patent document with application number: CN202311433259.0 discloses an ECOF four-micro physicochemical membrane small sewage treatment device, which is used for sporadic and scattered sewage treatment in highway service area toll stations, rural areas, towns, cities, enterprises, parks, and communities. The electrolytic cell, anaerobic tank, anoxic tank, aerobic tank, sedimentation tank, electric flocculant cell and filter membrane tank are arranged in sequence on a box body, and these cells are used to complete electrolysis, biochemistry, electric flocculant, and filtration treatment of sewage in sequence, thereby achieving the purpose of nitrogen removal and phosphorus removal. However, since this small-scale sewage treatment equipment is equipped with multiple tanks, each tank requires a certain volume (setting it too small is not conducive to sewage treatment and is prone to clogging); therefore, the miniaturization of sewage treatment equipment with multiple tanks has a certain limit.

[0004] In this regard, engineers have come up with the idea of ​​using one tank to complete electrolysis, biochemistry, and electroflocculation at the same time. For example, the publication number: CN202311433578.1 discloses an ECIS four-micro physicochemical membrane small sewage treatment device, which only has a treatment tank and a filter tank; the sewage is treated in the treatment tank to complete the electrolysis, biochemistry, physicochemistry, and electroflocculation processes, and the sewage is denitrified and dephosphorized, and the nitrogen and phosphorus content of the sewage is reduced while the pollutants in the sewage are flocculated and settled. The treated sewage clear liquid overflows into the filter tank and is filtered and discharged in the filter tank. This technical solution breaks through the limit of miniaturization of sewage treatment equipment, but because it is necessary to complete the electrolysis, biochemistry, physicochemistry, and electroflocculation processes in the same cavity, each sewage treatment process needs to be carried out in the treatment tank in sequence according to the time axis. Electrolysis, anoxic stage, aerobic stage, electroflocculation stage and other processes; a 3-ton small sewage treatment equipment takes more than 5 hours to treat sewage at a time, and the efficiency is too low to meet the actual requirements for medium and fast sewage treatment. Summary of the invention

[0005] The purpose of the present invention is to provide an ECIS sewage treatment device that can achieve sufficient aeration, so as to solve the technical problem that the single-chamber small sewage treatment equipment in the prior art mentioned above is not efficient in treating sewage and cannot meet the requirements of rapid sewage treatment in actual life.

[0006] In order to solve the above problems, an ECIS sewage treatment device capable of achieving full aeration is disclosed, comprising a treatment tank, a filter tank and a sewage discharge system arranged in sequence; a physicochemical and biochemical treatment unit is arranged in the treatment tank, and the sewage is subjected to a physicochemical and biochemical treatment process of nitrogen and phosphorus removal in the physicochemical and biochemical treatment unit, and the physicochemical and biochemical treatment unit comprises an electrode assembly, an aeration system and a reflux system; microbial self-flocculating particles are put into the treatment tank; the aeration system comprises an aeration device arranged at the bottom of the treatment tank and capable of being controlled independently, the aeration device is provided with a pusher capable of pushing air downward, and the bottom of the treatment tank is a conical bottom with an inclination angle greater than 55 degrees.

[0007] The beneficial effects of this embodiment are:

[0008] 1. In order to adapt to the requirements of sporadic and scattered sewage treatment in the existing technology, engineers have broken through the miniaturization limit of sewage treatment equipment and only set up a sewage treatment chamber in the sewage treatment equipment. Therefore, the electrolysis, anoxic stage, aerobic stage, electroflocculation stage and other processes need to be carried out in sequence on the timeline in the chamber. Each process requires a certain amount of time, resulting in low sewage treatment efficiency. In order to improve the efficiency of sewage treatment, the time of the electrolysis, anoxic stage, aerobic stage, and electroflocculation stage can only be shortened. Therefore, engineers studied the entire equipment and found that in the prior art, the aeration device in the ECIS sewage treatment device is located above the conical bottom, and the disk is facing upward. Therefore, when air enters the sewage treatment device, the bubbles float up quickly, and the sewage at the bottom of the aeration disk is not fully aerated. In order to ensure the sewage treatment effect and improve the aeration efficiency, it is necessary to wait for the oxygen to melt into the water and then pass downward. The aerobic stage time is too long. In this regard, the present application designs a new aeration device, which uses the driving force of the new aeration device to push the gas downward. When it encounters the conical bottom, due to the narrow space at the bottom of the conical bottom, it is impacted by the gas and water flow, and tumbles. It can rebound quickly and then flow upward, which allows the sewage below the device to not only contact with the air, but also form convection with the upper sewage, and the overall explosion effect is uniform. Therefore, the time of the aerobic stage can be reduced. In this way, the time for a single sewage treatment of the sewage treatment equipment of the present application is shortened.

[0009] 2. In order to shorten the sedimentation time, the present application adds microbial self-flocculating particles in the treatment pool. The microbial self-flocculating particles are formed by the self-aggregation of microorganisms under specific operating conditions to form granular bacterial clusters. Due to the large bacterial density, strong sewage treatment capacity and fast sedimentation, they are a good choice for the small sewage treatment equipment of the present application; but when it was put into use, it was found that the microbial self-flocculating particles were a large number of filamentous bacteria that proliferated during the sewage treatment process. The structure of the filamentous bacteria was relatively loose, and excessive proliferation would destroy the structure of the microbial self-flocculating particles, resulting in the destruction of the particle structure and the formation of flocs with poor sedimentation performance. Therefore, a longer sedimentation time is required. If drainage is carried out without thorough sedimentation, the discharged water will bring out a large amount of bacterial colonies, resulting in a decrease in the sludge concentration in the treatment pool, and then the system collapses and cannot treat the water body. Therefore, the sedimentation time cannot be reduced, limiting the efficiency of the sewage treatment of the present application. By observing and studying the formation process of microbial self-flocculation particles, it is found that the shear force in water is an important factor in whether particles can be formed. Therefore, it is inferred that the shear force within a certain range can make the filamentous bacteria growing rapidly on the sludge surface shrink or fall off, thereby forming particles with dense structure. Too small a shear force cannot make the filamentous bacteria shrink or fall off, and too large a shear force may destroy the particle structure. Therefore, it is only necessary to control the size of the shear force within a suitable range to maintain the stability of microbial self-flocculation particles; shear force is the tangential force generated on the unit area of ​​fluid due to the interaction of intermolecular collision, friction, etc. during the flow of viscous fluid. The calculation formula is r = udu / dx, where du / dx is the tangential velocity gradient, also known as the shear rate, and μ is the dynamic viscosity coefficient of the liquid. From the above formula, it can be seen that the fluid shear force is proportional to the shear rate, and we can control the change of shear force in the reactor by controlling the size of the shear rate. It is used to maintain the stability of sludge particles. The greater the aeration intensity (apparent gas velocity), the greater the shear rate of the fluid. Therefore, by controlling the aeration intensity, the shear force environment in the treatment tank can be controlled to ensure the stability of the microbial self-flocculating particles. However, in the prior art, the aeration device is located above the conical bottom of the treatment tank. When air enters the sewage treatment device during aeration, the gas quickly floats up to form a shear force field, but the sludge at the bottom is not sheared by the shear force, resulting in the proliferation of filamentous bacteria on the surface of the microbial self-flocculating particles, destroying the particle structure. In the present application, a pusher is designed to thrust the gas downward. The pusher drives the gas downward and lifts the bottom sludge. The contact between the formed shear force field and the sludge cuts off the filamentous bacteria from the particle surface, causing it to shrink or fall off, thereby maintaining the stability of the microbial self-flocculating particles. Therefore, the present application can utilize the pusher and the microbial self-flocculating particles to achieve rapid sedimentation, and the sedimentation time can be reduced from the original 2 hours to less than 15 minutes. Therefore, the efficiency of sewage treatment in the present application is greatly improved.

[0010] 3. Since sewage requires microorganisms for biochemical treatment, and the microorganisms themselves are too small, and there are many disturbances in the sewage treatment process, the microorganisms are easy to overflow and cannot stably exist in the treatment tank. In order to ensure the stability of the microorganisms in the treatment tank, the prior art puts a microbial carrier into the treatment tank. The microbial carrier is an inorganic particle with a porous structure and pores that gradually increase from the inside to the outside (such as porous volcanic rocks), but these particles are too small and have many pores, so they are difficult to settle. After the microbial carrier is changed to a microbial self-flocculating particle in this application, the particle has a solid structure, so its sedimentation time is shorter. Experiments have shown that the original half-hour sedimentation was changed to less than 15 minutes.

[0011] Furthermore, the aeration device includes an air inlet pipe, and the pusher includes a bell housing with upper and lower openings, and a pusher blade is arranged in the bell housing. The bell housing structure with upper and lower openings enables the pusher blade to push the gas to the bottom, not only to push the gas, but also to push the water and gas into a gas-water mixture downward, which not only makes oxygen more soluble in water, but also generates a large number of small bubbles, and generates a small shear force during the rupture of the small bubbles, making it easier to shear the filamentous bacteria.

[0012] Furthermore, the microbial self-flocculating particles are anaerobic ammonia-oxidizing bacteria granular sludge,

[0013] Furthermore, a conical drainage platform is connected to the lower end of the bell jar, and the conical drainage platform guides the gas-water mixture to flow around the treatment pool to avoid dead corners where shear force cannot be formed, ensuring that the filamentous bacteria are sheared off.

[0014] Furthermore, the inclination angle of the conical bottom is greater than 55 degrees.

[0015] Furthermore, the air inlet pipe is connected to an air supply pipe, and the air supply pipe is a ring structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention,

[0017] Figure 2 is a structural schematic diagram of the second viewing angle of the present invention,

[0018] Figure 3 This is a schematic diagram of the front structure of the present invention.

[0019] Figure 4 It is a structural schematic diagram of the explosion device of the present invention,

[0020] Figure 5 This is a schematic diagram of the structure of the pusher of the present invention.

[0021] Figure 6 Schematic diagram of the internal structure of the pusher of the present invention.

[0022] Figure 7 is a top view of the mounting plate of the present invention,

[0023] Figure 8 It is a schematic diagram of the pipeline connection structure of the present invention. DETAILED DESCRIPTION

[0024] The following is further explained in detail through a specific implementation method: It should be noted that this application is an iterative upgrade based on the patent document with application number CN202311433578.1 (a small-scale sewage treatment device with ECIS four-micro physicochemical membrane), so the prior art mentioned in the process can refer to the above-mentioned patent document.

[0025] The figure marks in the drawings of the specification include: treatment tank 1, foam discharge outlet 11, filter tank 2, pipe cavity 3, aeration device 4, air supply pipe 41, pusher 42, air connecting pipe 421, bell jar 422, conical drainage platform 423, mounting plate 424, fixing ring 4241, cross support member 4242, connecting platform 4243, rotating shaft fixing ring 4244, pushing fan blade 425, air inlet pipe 43, microbial self-flocculating particles 5, electrode assembly 6.

[0026] Implementation example Figure 1-7 As shown: A fully aerated ECIS sewage treatment device includes three cavities, namely, a treatment tank 1, a filter tank 2 and a pipe cavity 3, which are arranged in sequence; the treatment tank 1 and the filter tank 2 are both vertical square cylindrical structures, and the bottoms of the treatment tank 1 and the filter tank 2 are both funnel-shaped conical bottoms. It is convenient to concentrate the sediment sludge at the bottom and then discharge it, wherein the inclination angle formed by the funnel-shaped bottom of the treatment tank 1 and the ground is greater than 55 degrees. The treatment tank 1 is installed with an electrode assembly 6, an aeration system and microbial self-flocculating particles 5; the filter tank 2 is installed with a stainless steel fine filter assembly. A horizontal pipe is provided in the middle of the treatment tank 1 to connect with the filter tank 3, and a solenoid valve is provided on the horizontal pipe. After the sewage is treated, it is precipitated. After the sedimentation is completed, the solenoid valve on the horizontal pipe is opened to allow the treated clean water to flow into the filter tank 1. A plurality of pipes and pump bodies are installed in the pipe cavity 3, and these pipes and pump bodies constitute a reflux system, a sewage discharge system and an aeration system. A reflux pipe is arranged in the reflux system, one end of the pipe is connected to the upper space of the treatment tank 1, and the other end is connected to the lower space of the treatment tank 1, and a reflux pump is arranged in the middle. Therefore, when the reflux pump is started, the water in the upper part of the treatment tank 1 can flow along the reflux pipe and then be pumped out from the lower part of the treatment tank. The sewage discharge system includes sewage discharge branch pipes respectively arranged at the bottom of the treatment tank 1 and the filter tank 2, and the sewage discharge branch pipes are respectively connected to the sewage main pipe, and stop valves are respectively installed on the sewage discharge branch pipes, which can individually control the sludge in the treatment tank 1 and the filter tank 2 to be discharged to the external space.

[0027] The aeration system is provided with an aeration pipe and an aeration fan arranged on the aeration pipe. One end of the aeration pipe is connected to the aeration device 4 in the treatment tank 1. The aeration pipe is also provided with a froth discharge port 11 and a discharge pipe.

[0028] like Figure 2 , Figure 3 , Figure 4 As shown, the aeration device 4 is arranged in the lower space of the treatment tank 1, but at the upper end of the conical bottom. The aeration device 4 includes an air supply pipe 41 and a pusher 42. The air supply pipe 41 is a rounded annular structure and is connected to the aeration pipe in the pipe cavity 3 by an air inlet pipe 43; the pushers 42 are connected downward at the centers of the four sides.

[0029] Water pusher 42 Figure 5 , Figure 6 , Figure 7 The bell jar 422 shown includes a cylindrical shell structure with upper and lower openings. The bell jar 422 is a channel structure with upper and lower openings. A mounting plate 424 is welded to the upper end of the bell jar 422. The mounting plate 424 includes a fixing ring 4241 with a circular ring structure arranged on the outer circumference. The outer diameter of the fixing ring 4241 is consistent with the inner diameter of the bell jar 422. Therefore, the fixing ring 4241 is inserted into the bell jar for welding. The middle part of the mounting plate 424 is hollowed out, and a cross support member 4242 is welded to the inner wall of the fixing ring 4241. In order to ensure stable welding, the cross support member 4242 includes a rod part and a connector part. The two are an integrated structure. The cross support member 4242 is connected to the fixing ring 4241 by a connector. The width of the connector is greater than the width of the rod of the cross support member 4242. In order to fit the inner wall of the fixing ring 4241, the outer contour of the connector is arc-shaped, and the curvature is consistent with the inner curvature of the fixing ring 4241.

[0030] A connecting platform 4243 is provided at the cross intersection of the cross support member 4242. The outer contour of the connecting platform 4243 is cylindrical, and the middle part is an aeration channel, so that air can pass through the connecting platform 4243 into the interior of the bell jar 422. A threaded hole is provided on the upper end surface of the connecting platform 4243.

[0031] The bell jar 422 is connected to an air connection pipe 421 on the top. The air connection pipe 421 is a stainless steel pipe. A connecting plate with a diameter larger than that of the air connection pipe 421 is welded to the lower end of the air connection pipe 421. The cross-section of the connecting plate is a circular ring, and the inner diameter is consistent with that of the air connection pipe 421. The connecting plate is also provided with threaded holes. Therefore, the connecting plate can be fitted with the upper end surface of the connecting platform 4243, and the threaded holes on the two can be aligned. The air connection pipe 421 is fixedly connected to the connecting platform 4243 with bolts, and then the air connection pipe 421 is fixedly connected to the fixing ring 4241.

[0032] A pushing blade 425 that can generate a downward driving force is provided in the inner cavity of the bell jar 422. The axis of the pushing blade 425 coincides with the central axis of the bell jar 422. The upper end of the axis of the pushing blade 425 extends into the aeration channel and is welded to the inner wall of the aeration channel by a support rod. Since the support rod is provided, an air flow channel is left in the aeration channel and the pushing blade 425. In order to ensure the rotation of the pushing blade 425, one end of the support rod is welded to the inner wall of the aeration channel, and the other end is welded to a rotating shaft fixing ring 4244. A ball bearing is provided between the axis of the pushing blade 425 and the rotating shaft fixing ring 4244 to form a rotating connection, so that it can rotate relative to the bell jar 422, and the pushing blade 425 is keyed to the pushing blade 425 axis, so that the pushing blade 425 can rotate along with the pushing blade 425 axis.

[0033] The upper end of the push blade 425 shaft is connected to the aeration channel, and the lower end is rotatably connected to the conical drainage platform 423. The conical drainage platform 423 is a conical shell formed by sheet metal, and a rotating motor is arranged inside to drive the push blade 425 to rotate. The output shaft of the rotating motor passes through the upper end surface of the conical platform 3 and is connected to the rotating shaft by a coupling. The conical drainage platform 423 is rotatably sealed by a sealed bearing where the output shaft of the rotating motor passes through, ensuring that no water can leak into the conical drainage platform 423.

[0034] The microbial self-flocculating particles 5 are granular bacterial masses of anaerobic ammonia-oxidizing bacteria, which are cultured using the ECIS sewage treatment device of the present application. Before the present application is put into operation, the microbial self-flocculating particles 5 are first cultured and put into use after the cultivation is completed.

[0035] Before cultivation, the sewage that needs to be treated later needs to be introduced into this application, and oxygen-ammonia oxidizing bacteria are inoculated for cultivation. When the microbial self-flocculation particles are cultivated, the device of this application only performs electrolysis and electroflocculation once. After the electrolysis and electroflocculation are completed, formal cultivation begins. A small cycle of cultivation has four stages: water intake, aeration, sedimentation and drainage. After the drainage is completed, water is added again to enter the next small cycle. Four small cycles are completed every day. The entire cultivation process takes a total of one month.

[0036] Water inlet: Sewage enters the treatment tank 1 from the water inlet pipe of the present application and needs to fill the entire treatment tank 1.

[0037] Aeration: Start aeration device 4 to start aeration culture, and the apparent air velocity of aeration intensity is not less than 1.2 cm / s; the aeration time is 4.5-5 hours.

[0038] Sedimentation: During the culture process, the sedimentation time needs to be continuously shortened to increase the biological selection pressure. The sedimentation time is shortened from 30 minutes in the first week, 25 minutes in the second week, 20 minutes in the third week, and 15 minutes in the fourth week. Shortening the sedimentation time can screen microbial self-flocculating particles with good sedimentation performance.

[0039] Drainage: Since a horizontal pipe is provided in the middle of the treatment pool of this application, the volume exchange rate during drainage can be guaranteed to be about 50%.

[0040] After the cultivation is completed, microbial self-flocculation particles 5 are obtained. Specific embodiments

[0042] After the water enters, when the sewage level submerges the electrode assembly 6, the electrode assembly 6 continues to work and the reflux system is turned on. The water in the treatment pool flows up and down, thereby ensuring that the water fully contacts the electrode assembly 6 to achieve a full electrolysis effect. By controlling the pulse voltage and frequency of the electrode assembly 6, the iron electrode in the electrode assembly 6 is energized. Under the action of the voltage, the oily macromolecular pollutants in the water are broken to form small molecular organic and inorganic substances. The small molecular organic substances serve as carbon sources in the biochemical stage, and the inorganic substances solidify the phosphorus in the sewage to achieve the purpose of phosphorus removal. After the iron electrode is energized, the electrode will generate heat, thereby heating the water body. Heating is beneficial to the reaction between microorganisms and water in the subsequent biochemical stage. In the biochemical treatment stage, the temperature is below 15°C, and the biochemical microorganisms attached to the microbial carrier will be in a dormant state, and when the temperature reaches about 25°C, the biochemical microorganisms are most active.

[0043] Anaerobic stage in biochemical treatment: After the sewage is electrolyzed, the return system is closed, so that the sewage in the entire treatment tank 1 is allowed to stand still and part of the sediment is settled.

[0044] Anoxic stage in biochemical treatment: turn on the aeration system and the reflux system, where the aeration fan operates in a mode of 5 minutes on and 10 minutes off, and the apparent air velocity of the aeration intensity is controlled at 0.6-4cm / s; at the same time, the reflux pump of the reflux system continues to work, pumping the nitrification liquid in the middle back to the bottom of the pool. Since the aeration device 4 is aerated downward and a pusher 42 is provided, the sediment sludge cannot cover the aeration device, and the aeration is smooth. Each time aeration is performed, the dissolved oxygen content in the sewage increases, and the dissolved oxygen content is gradually consumed and reduced during the aeration interval, and the anoxic stage lasts for 1 hour.

[0045] Aerobic stage in biochemical treatment: the aeration fan is turned on continuously, and the reflux system is turned on continuously. The reflux system extracts the nitrification liquid in the middle and pumps it out from the bottom of the treatment tank to achieve the effect of disturbance stirring, so that the self-flocculating particles of microorganisms in the water can fully contact with oxygen, and the shear force of aeration is used to remove the filamentous bacteria on the surface of the particles to avoid excessive proliferation of filamentous bacteria on the surface of the particles and damage the particle structure. The aerobic stage lasts for 80 minutes.

[0046] Electroflocculation stage: After the aerobic stage is completed, the aeration fan is turned off, the electrode assembly 11 is turned on, and the pulse voltage and frequency are controlled so that the aluminum electrode in the electrode assembly 11 is energized. The aluminum electrode releases aluminum ions during work, and the aluminum ions adsorb pollutants in the water and flocculate and precipitate. After the electroflocculation stage is completed, the reflux system is turned off to allow the sewage to settle. It only takes 15 minutes to complete the sedimentation. After a short period of sedimentation, drainage begins. At this time, the granular sludge has been precipitated, and the filamentous bacteria that have been cut off have no time to precipitate and are discharged together with the water. Therefore, the process is to screen the sedimentation rate of the microbial particles with ethanol. As the operating time cycle is extended, the sedimentation time can be further shortened to within 15 minutes.

[0047] Filtration stage: The sewage after sedimentation and the sewage supernatant enter the filter tank 2 through the horizontal pipe in the middle of the treatment tank 1. The stainless steel fine filter component filters the sewage, and the flocculants and sediments are filtered in the filter tank 2. The clean water is discharged from the inside of the fine filter component to the clean water drain pipe, and then passes through the tubular ultraviolet sterilizer to complete the entire sewage treatment process.

[0048] Among them, the iron electrode is selected for electrolysis because it has a better phosphorus removal effect than the aluminum electrode. Electrolytic iron has a better phosphorus removal effect; aluminum can achieve flocculation. The most commonly used anode materials for traditional electroflocculation are aluminum and iron. According to many scientific research results, the flocculation effect of aluminum electrodes is better, while the economic applicability of iron electrodes is stronger. Therefore, aluminum anodes are mostly used for drinking water treatment, and iron anodes are mostly used to treat various industrial wastewaters and domestic sewage. In this scheme, both are used in sewage treatment.

[0049] After a batch of sewage is treated, the sludge at the bottom is discharged through the sewage branch pipes at the bottom of the treatment tank 1 and the filter tank 2, and the sludge and foam are discharged from the outside of the entire sewage treatment device.

[0050] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An ECIS sewage treatment device capable of achieving full aeration, comprising a treatment tank, a filter tank and a sewage discharge system arranged in sequence; a physicochemical and biochemical treatment unit is provided in the treatment tank, and the sewage is subjected to a physicochemical and biochemical treatment process for nitrogen and phosphorus removal in the physicochemical and biochemical treatment unit, and the physicochemical and biochemical treatment unit comprises an electrode assembly, an aeration system and a reflux system; characterized in that: Microbial self-flocculating particles are put into the treatment pool; the aeration system includes an aeration device arranged at the bottom of the treatment pool and can be independently controlled, the aeration device includes a pusher that can generate thrust for gas downward, and the bottom of the treatment pool is a conical bottom.

2. The ECIS sewage treatment device capable of achieving full aeration according to claim 1, characterized in that: The aeration device comprises an air inlet pipe, the pusher comprises a bell jar with upper and lower openings, the air inlet pipe is connected with the bell jar but does not close the upper and lower openings of the bell jar, and a pusher blade is arranged in the bell jar.

3. The ECIS sewage treatment device capable of achieving full aeration according to claim 2, characterized in that: The microbial self-flocculating particles are granular sludge of anaerobic ammonia-oxidizing bacteria.

4. The ECIS sewage treatment device capable of achieving full aeration according to claim 3, characterized in that: The lower end of the bell jar is connected with a conical drainage platform.

5. The ECIS sewage treatment device capable of achieving full aeration according to claim 2, characterized in that: The inclination angle of the conical bottom is greater than 55 degrees.

6. The ECIS sewage treatment device capable of achieving sufficient aeration according to claim 2, characterized in that: The air inlet pipe is connected to an air supply pipeline, and the air supply pipeline is a ring structure.

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