CN116947201A

CN116947201A - Iron-carbon sludge film reinforced lean electronic sewage treatment device and method based on foamless aeration

Info

Publication number: CN116947201A
Application number: CN202310969374.3A
Authority: CN
Inventors: 张晗; 薛莹; 白朗明; 赵静; 余张杰; 王金龙; 梁恒
Original assignee: Harbin Institute of Technology Shenzhen
Current assignee: Harbin Institute of Technology Shenzhen
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2023-10-27
Anticipated expiration: 2043-08-03
Also published as: CN116947201B

Abstract

An iron-carbon mud film reinforced lean electronic sewage treatment device and method based on bubble-free aeration, which belong to the technical field of sewage treatment. The application solves the problems that the existing membrane oxygen transfer biological membrane technology cannot adapt to the shortage of electron donors generated by a carbon source in the denitrification process of sewage with low carbon nitrogen ratio and the operation cost of the added carbon source is higher. The reactor comprises a reactor main body, wherein a porous partition plate is vertically fixed in the reactor main body, the inside of the reactor main body is divided into an iron carbon filling chamber and a bubble-free aeration chamber through the porous partition plate, an MABR membrane assembly is fixedly arranged in the bubble-free aeration chamber and is connected with a gas cylinder through a gas supply pipeline, iron carbon micro-electrolysis filler is arranged in the iron carbon filling chamber, a water inlet tank is connected to a water inlet of the reactor main body through a water inlet pipeline, and a water outlet tank is connected to a water outlet of the reactor main body through a water outlet pipeline. The sewage is coupled with the microbial metabolism process of the biomembrane attached to the surface of the MABR membrane component through the iron-carbon sludge micro-electrolysis process, and pollutants in the water are cooperatively removed.

Description

Iron-carbon sludge film reinforced lean electronic sewage treatment device and method based on foamless aeration

Technical Field

The application relates to an iron-carbon sludge film reinforced lean electronic sewage treatment device and method based on bubble-free aeration, and belongs to the technical field of sewage treatment.

Background

Most of the existing domestic sewage has the problem of insufficient carbon source, and the electron donor required by denitrification is insufficient, so that the conventional activated sludge method is required to be additionally provided with the carbon source, on one hand, the cost is increased, and on the other hand, the additional carbon source also causes the increase of the sludge yield and the subsequent sludge treatment burden.

Iron carbon microelectrolysis utilizes corrosion reaction of iron anode to produce Fe ²⁺ Enrichment of nitrate-reduced ferrous oxide bacteria (NRFOB) which transfer oxidized Fe ²⁺ After the obtained electrons reach ubiquinone, nar on the cell inner membrane reduces nitrate nitrogen by receiving electrons from ubiquinone, so that the requirement for additional organic matters in the process of treating the electron-poor donor sewage is reduced. In addition, the iron coagulation generated in the electron supply process can also improve the removal effect of phosphate in sewage. However, iron corrosion and Fe ²⁺ Oxygen is needed in the oxidation process, the oxygen utilization rate of aeration modes such as blast aeration and the like adopted by the existing iron-carbon micro-electrolysis technology is not high, and the energy consumption of the traditional blast aeration accounts for 50-70% of the energy consumption of a sewage treatment plant, so that the energy consumption is high. Meanwhile, in the field of water treatment, the hydraulic disturbance does not cause great damage to the system, but the gasThe shearing force generated by the water together action is huge, so that the traditional blast aeration inevitably causes larger disturbance in the system, and a mud film formed on the surface of the iron and carbon is easily sheared, so that the iron mud formed by oxidized iron is easily fallen off, and finally the starting time of the reactor is longer; in addition, the common aeration can cause the dissolved oxygen in the reactor to reach 6-7mg/L, so that a large amount of exposed iron is lost in an ineffective oxidation way, and in addition, a large amount of iron loss can cause a large amount of ferric hydroxide (iron mud) to be generated, so that the reaction tank is blocked.

In addition, in the prior art, most of sewage treatment equipment utilizing the iron-carbon micro-electrolysis technology is that iron-carbon is piled up at the bottom or the upper part of the equipment, after the equipment runs for a certain time, iron-carbon needs to be supplemented into the equipment, when the iron-carbon is positioned at the bottom of the equipment, larger disturbance can be inevitably generated on sewage in the equipment in the process of supplementing the iron-carbon, and if other structures are arranged above the iron-carbon, the iron-carbon can be supplemented only by moving the structures, so that the iron-carbon supplementing process is complicated; when the iron carbon is positioned at the upper part of the equipment, the iron carbon can cause obstruction to other structures below the iron carbon, which is not beneficial to equipment maintenance.

Disclosure of Invention

The application aims to solve the problems that the existing membrane oxygen transfer biological membrane technology cannot adapt to the low carbon nitrogen ratio sewage, the electron donor generated by the carbon source in the denitrification process is insufficient and the operation cost of the additional carbon source is high, and further provides an iron-carbon sludge membrane reinforced lean electron sewage treatment device and method based on bubble-free aeration.

The technical scheme adopted by the application for solving the technical problems is as follows:

the utility model provides an electronic sewage treatment plant of lean in iron carbon mud membrane reinforcement based on bubble-free aeration, includes reactor main part, water tank, play water tank, gas cylinder and MABR membrane module, wherein, vertical porous division board that has set firmly in the reactor main part, is iron carbon filling room and bubble-free aeration chamber about with the reactor main part inside through porous division board, MABR membrane module is adorned admittedly in the bubble-free aeration chamber, and is connected with the gas cylinder through the air feed line, be provided with the little electrolysis filler of iron carbon in the iron carbon filling room, water tank is connected to the water inlet of reactor main part through the water inlet pipeline, it is connected to the delivery port of reactor main part through the water outlet pipeline to go out the water tank.

Further, the MABR membrane modules are plural in number and are fixed on one side wall of the reactor body side by side in the horizontal direction.

Further, the MABR membrane module employs a hydrophobic organic membrane.

Further, the top cover of the reactor body is provided with a top cover.

Further, an air inlet valve, a pressure gauge and a gas flowmeter are arranged on the air supply pipeline.

Further, a water inlet valve, a water inlet pump and a water inlet flowmeter are arranged on the water inlet pipeline, and a water outlet valve is arranged on the water outlet pipeline.

Further, the water inlet and the water outlet of the reactor main body are respectively arranged on the front side wall and the rear side wall of the reactor main body, and the water inlet is lower than the water outlet.

Further, the diameter of the water outlet is larger than or equal to the diameter of the water inlet.

The sewage treatment method adopting the device comprises the following steps:

step one, raw water in a water inlet tank enters a reactor main body through a water inlet pipeline, and the ratio of the effective volume in the reactor main body to the water inlet is set to be the hydraulic retention time by controlling the water inlet quantity;

step two, the gas cylinder carries out bubble-free aeration into the reactor main body through a gas supply pipeline and a membrane component;

step three, coupling the sewage in the reactor main body with the microbial metabolism process of the biological film attached to the surface of the MABR membrane component through the iron-carbon sludge micro-electrolysis process of the iron-carbon filling chamber, and cooperatively removing pollutants in the water;

and step four, the sewage in the reactor main body is discharged into a water outlet tank through a water outlet pipeline.

Further, the hydraulic retention time set in the first step is 8-48 h.

Compared with the prior art, the application has the following effects:

the sewage in the reactor main body is coupled with the microbial metabolism process of the biomembrane attached to the surface of the MABR membrane component through the iron-carbon sludge micro-electrolysis process of the iron-carbon filling chamber, and pollutants in water are removed cooperatively.

According to the application, the iron-carbon sludge and the bubble-free aeration biological film are coupled, on one hand, the bubble-free aeration is utilized to improve the gas supply efficiency, the problem of iron loss caused by rapid oxidation of iron due to high oxygen concentration in mixed liquid caused by a common oxygen supply mode is avoided, the dependence of a denitrification process on organic matters is reduced by utilizing iron-carbon micro-electrolysis electron supply, and finally, iron coagulation generated in the electron supply process can be efficiently dephosphorized.

The application adopts the bubble-free aeration technology to diffuse the oxygen in the membrane cavity into the mixed liquor through the membrane holes, so that the oxygen utilization efficiency is improved by efficient oxygen mass transfer, and the problems of high oxygen concentration in the mixed liquor and iron loss caused by massive oxidation of iron due to a common oxygen supply mode are avoided.

According to the application, by adopting the MABR membrane assembly, the real bubble-free aeration of the membrane aeration can be realized by utilizing a biological process, gas is diffused out of the membrane holes and is rapidly utilized by organisms attached to the surface of the aeration membrane before visible bubbles are formed, so that the bubble-free aeration is formed, and the iron mud formed by oxidized iron is effectively prevented from falling off.

In the application, the gas enters the reactor main body through the biological film in the MABR film component, and is not in direct contact with the iron carbon, so that a great amount of iron carbon loss is further avoided.

An iron-carbon filling chamber is arranged in the reactor main body 1, and the problem of insufficient carbon source of sewage with low carbon-nitrogen ratio is relieved by adding an iron-carbon micro-electrolysis filler 10;

the iron-carbon micro-electrolysis filler 10 has longer service life, can maintain the high-efficiency operation of the device by only adding once in the starting stage of the device, and has simple operation and low operation cost.

Drawings

Fig. 1 is a schematic front view of the present application.

In the figure: 1. a reactor body; 1-1, a water inlet; 1-2, a water outlet; 2. a water inlet tank; 3. a water outlet tank; 4. a gas cylinder; 5. MABR membrane modules; 6. a porous separator plate; 9. an air supply line; 10. iron-carbon micro-electrolysis filler; 11. a water inlet pipeline; 12. a water outlet pipeline; 13. a top cover; 14. an air inlet valve; 15. a pressure gauge; 16. a gas flow meter; 17. a water inlet valve; 18. a water inlet pump; 19. a water inlet flowmeter; 20. and a water outlet valve.

Detailed Description

The first embodiment is as follows: while the present embodiment has been described in connection with fig. 1, it is to be understood that the embodiments described are merely a part, but not all, of the embodiments of the present application, and that all other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present application.

It should be noted that, the descriptions of the directions of the present application in terms of "front", "rear", "left", "right", "inner", "outer", "left", "right", "upper", "lower", "top", "bottom", etc. are defined based on the relationship of orientations or positions shown in the drawings, only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the structures described must be constructed and operated in a specific orientation, and therefore, the present application should not be construed as being limited thereto. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The utility model provides an electronic sewage treatment plant of iron carbon mud membrane reinforcement lean in based on bubble-free aeration, includes reactor main part 1, water tank 2, water tank 3, gas cylinder 4 and MABR membrane module 5 of intaking, wherein, vertical porous division board 6 of having set firmly in the reactor main part 1, is iron carbon filling room and bubble-free aeration room about with the inside of reactor main part 1 through porous division board 6, MABR membrane module 5 solid dress is in the bubble-free aeration room, and is connected with gas cylinder 4 through air feed line 9, be provided with iron carbon micro-electrolysis packing 10 in the iron carbon filling room, water tank 2 is connected to the water inlet 1-1 of reactor main part 1 through water inlet line 11, water tank 3 is connected to the delivery port 1-2 of reactor main part 1 through water outlet line 12.

The reactor main body 1 is provided with a water inlet 1-1 and a water outlet 1-2 which are respectively used for water inlet and water outlet of the reactor main body 1.

The porous partition plate 6 has a structure such as a wire mesh or a porous plate.

The MABR membrane component 5 (MABR, namely a membrane aeration biological membrane reactor) is a detachable structure. The MABR membrane module 5 is connected to the gas cylinder 4, and bubble-free aeration is performed inside the reactor main body 1. An air inlet is arranged on the MABR membrane component 5, and an air supply pipeline 9 is connected with the air inlet of the air bottle 4 and the MABR membrane component 5.

The reactor main body 1 is a square box body structure made of organic glass.

The sewage in the reactor main body 1 is coupled with the microbial metabolism process of the biological film attached to the surface of the MABR membrane component 5 through the iron-carbon sludge micro-electrolysis process of the iron-carbon filling chamber, and pollutants in the water are cooperatively removed.

In the application, by adopting the MABR membrane assembly 5, the real bubble-free aeration of the membrane aeration can be realized by utilizing a biological process, gas is diffused out of the membrane holes and is rapidly utilized by organisms attached to the surface of the aeration membrane before visible bubbles are formed, so that the bubble-free aeration is formed, and the iron mud formed by oxidized iron is effectively prevented from falling off. If the layer of organisms does not exist, the diffused gas is converged into bubbles to form gas-water sweeping, so that the disturbance in the system is larger finally, and a mud film formed on the surface of the iron carbon is easily sheared, so that the iron mud formed by oxidized iron is easily fallen off.

In the application, the gas enters the reactor main body 1 through the biological film in the MABR membrane component 5, and is not in direct contact with the iron carbon, so that a great amount of iron carbon loss is further avoided.

Under the membrane aeration, the disturbance in the reactor main body 1 is small, the iron mud formed by oxidized iron is not easy to fall off, the living beings are effectively trapped, the surface of the iron carbon is rapidly formed into a film, and the starting time of the reactor is shortened;

the iron carbon and organisms form a mud film body system, and mud films formed on the surface of the iron carbon are not sheared by bubble-free aeration, so that the mud films are not separated, and the exposure of the iron carbon is effectively avoided;

the membrane aeration system is in an anoxic state, and the dissolved oxygen of the mixed solution contacted with the iron and the carbon is about 1mg/L, so that the iron slow-release characteristic is formed.

The iron-carbon filler is placed on one side of the membrane component, and the iron-carbon filler and the membrane component are not interfered with each other, so that damage to the membrane component in the process of replacing or adding the iron-carbon filler is avoided;

the iron carbon forms a part of coagulation trapping effect under the membrane aeration, and the phosphate is trapped on the surface of the iron carbon mud membrane, so that the phosphorus removal is enhanced, and the problem of poor phosphorus removal efficiency of the existing membrane aeration biological membrane reactor is solved;

the iron-carbon biofilm system can form a large number of bacteria denitrified by microelectrolysis electrons, and autotrophic denitrification is completed under the condition of less carbon source supply.

In the iron-carbon sludge film reinforced lean electronic sewage treatment device based on bubble-free aeration, an iron-carbon filling chamber is arranged in a reactor main body 1, the problem of insufficient carbon source of sewage with low carbon-nitrogen ratio is relieved by adding an iron-carbon micro-electrolysis filler 10, the iron-carbon filler forms countless tiny corrosion cells in the sewage, and Fe generated by utilizing corrosion reaction of an iron anode is utilized ²⁺ Enrichment of nitrate-reduced ferrous oxide bacteria (NRFOB) promotes the reduction of nitrate nitrogen. Fe (Fe) ²⁺ The addition of an additional electron donor also increases the activity of the nitric oxide reductase NorB and NosZ, promoting the further reduction of the denitrification intermediate NO to N ₂ Thereby promoting the removal of total nitrogen and reducing the influence of organic matters on the denitrification process.

In addition, by arranging the iron-carbon filling chamber, fe generated in the iron-carbon micro-electrolysis reaction ²⁺ Oxidized in the electron supply process, and the generated iron coagulation can further improve the removal effect of phosphate in sewage.

By arranging an iron-carbon filling chamber, the iron-carbon micro-electrolysis filler 10 anode Fe ²⁺ The oxidation product FeOOH of (2) can enrich ferric iron reducing bacteria (FRB) which can reduce Fe ³⁺ Can improve the degradation effect of organic matters and promote Fe at the same time ²⁺ And Fe (Fe) ³⁺ Thereby improving the stability of the iron-carbon sludge film. Therefore, the iron-carbon micro-electrolysis filler 10 has longer service life, can maintain the high-efficiency operation of the device by only adding once in the starting stage of the device, and has simple operation and low operation cost.

In the iron-carbon mud film reinforced lean electronic sewage treatment device based on bubble-free aeration, compared with the traditional aeration head or blast aeration, the device adopts bubble-free aeration, has higher oxygen transmission rate, saves more energy consumption, avoids the blowing-off of volatile pollutants or greenhouse gases caused by bubble aeration, and reduces the pollution to the atmosphere.

The iron-carbon sludge film reinforced lean electronic sewage treatment device based on bubble-free aeration adopts the detachable MABR film components 5, and the number and the size of the film components can be adjusted according to different inflow water qualities, so that the application range of the film oxygen-transfer biological film reactor to sewage with different carbon-nitrogen ratios is enlarged.

The MABR modules 5 are plural in number and are fixed on one side wall of the reactor body 1 side by side in the horizontal direction. So designed, the number of MABR modules 5 is related to the volume of the reactor body 1, and the larger the volume of the reactor body 1, the more MABR modules 5 are correspondingly arranged. The MABR membrane module 5 employs a hydrophobic organic membrane, and is not limited to inorganic membranes such as ceramic membranes.

The MABR membrane module 5 employs a hydrophobic organic membrane. The membrane material is polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polypropylene (PP) or Polydimethylsiloxane (PDMS), and the pore diameter of the membrane is 0.01 m-0.20 mu m; the number and the size of the membrane components can be changed, and the effective area of the membrane is 0.01-0.04 m ² 。

The top cover of the reactor body 1 is provided with a top cover 13.

The air supply line 9 is provided with an air intake valve 14, a pressure gauge 15, and a gas flow meter 16.

The water inlet pipeline 11 is provided with a water inlet valve 17, a water inlet pump 18 and a water inlet flowmeter 19, and the water outlet pipeline 12 is provided with a water outlet valve 20. The design can design the oxygen supply mode to supply oxygen continuously or intermittently according to the water quality of the effluent.

The water inlet 1-1 and the water outlet 1-2 of the reactor main body 1 are respectively arranged on the front side wall and the rear side wall of the reactor main body 1, and the water inlet 1-1 is lower than the water outlet 1-2.

The diameter of the water outlet 1-2 is larger than or equal to the diameter of the water inlet 1-1.

The sewage treatment method adopting the device comprises the following steps:

step one, raw water in a water inlet tank 2 enters a reactor main body 1 through a water inlet pipeline 11, and the ratio of the effective volume in the reactor main body 1 to the water inlet is set to be the hydraulic retention time by controlling the water inlet quantity; raw water in the water inlet tank 2 enters the reactor body 1 through the water inlet pipeline 11 under the lifting of the water inlet pump 18.

Step two, the gas cylinder 4 carries out bubble-free aeration into the reactor main body 1 through a gas supply pipeline 9 and a membrane component; aeration pressure is controlled to be 10-300 kPa, and gas flow is controlled to be 1-5mL/min by adjusting an air inlet valve 14, a pressure gauge 15 and a gas flow meter 16, so that macroscopic bubbles do not appear on the surface of the membrane component. The air supply mode can be continuous air supply or intermittent air supply, and the air supply type can be air or pure oxygen.

Step three, coupling the sewage in the reactor main body 1 with the microbial metabolism process of the biological film attached to the surface of the MABR membrane component 5 through the iron-carbon sludge micro-electrolysis process of the iron-carbon filling chamber, and cooperatively removing pollutants in the water; because oxygen supply is bubble-free aeration, power stirring is used to completely mix the system, and the rotation speed of the stirrer is 20-1000 rpm. The adding amount of the iron-carbon micro-electrolysis filling 10 in the iron-carbon filling chamber is 0-300 g/L, the granularity of the iron-carbon micro-electrolysis filling 10 is 3-14 mm in a spherical shape, and the specific surface area is 0.8-1.6 m ² /g。

And step four, sewage in the reactor main body 1 is discharged into the water outlet tank 3 through the water outlet pipeline 12. The sewage flows upwards from the bottom of the reactor body 1 and overflows into the water outlet pipeline 12 through the water outlet 1-2.

The hydraulic retention time set in the first step is 8-48 h.

The second embodiment is as follows: the present embodiment will be described with reference to fig. 1, which is a sewage treatment method using the apparatus according to the above embodiment, comprising the steps of:

step one, a reactor film forming stage. Adding a sewage into the reactor body 1The secondary sedimentation tank sludge with the sludge concentration of 4000mg/L is added into the iron-carbon filling chamber in the reactor main body 1 at the same time, 50g of the secondary sedimentation tank sludge with the specific surface area of 1.2m is added ² And/g, spherical iron-carbon filler with the particle size of 3-6 mm. The start-up phase the reactor body 1 was run in SBR (sequencing batch reactor) mode at room temperature for 12h as a cycle comprising 20min of inlet water, 11h of mixed aeration and 40min of precipitation drainage. Raw water is lifted by a water inlet pump 18, enters the reactor main body 1 through a water inlet pipeline 11, and is supplied with oxygen by opening an air inlet valve 14 on an air supply pipeline 9 to the MABR membrane component 5, and the aeration rate is controlled at 2mL/min. The raw water is artificial synthetic wastewater, wherein COD is 300mg/L, ammonia nitrogen is 40mg/L, and phosphate is 3mg/L. And collecting a water sample of water outlet every day, and periodically carrying out water quality analysis. After 1-2 weeks, when the surface of the iron carbon in the iron carbon filling chamber is covered with tan sludge and the microporous membrane on the MABR membrane component 5 is adhered with a compact biological membrane, the reactor membrane hanging is considered to be successful.

And step two, a stable operation stage. Steady operation stage the reactor body 1 was operated in continuous flow mode at room temperature, three stages were set for the test, the carbon to nitrogen ratios were 2, 5, 8, respectively, the hydraulic retention time was set to 24h, and the stirring speed was 500rpm. Raw water in the water inlet tank 2 enters the reactor main body 1 through the water inlet pipeline 11 under the lifting of the water inlet pump 18, and the water inlet amount is regulated by controlling the water inlet pump 18, so that the ratio of the effective volume of the reactor main body 1 to the water inlet amount is 24h. The gas is supplied by a gas cylinder 4, enters the MABR membrane component 5 through a gas supply pipeline 9 and is aerated into the reactor main body 1; the air flow is controlled to be 2mL/min by adjusting an air inlet valve 14, a pressure gauge 15 and a gas flowmeter 16, so that macroscopic bubbles do not appear on the surface of the MABR membrane component 5; the concentration of dissolved oxygen in the reactor main body 1 is controlled to be 0.5mg/L or less. The sewage in the reactor main body 1 is coupled with the microbial process in the biomembrane attached to the surface of the membrane component through the iron-carbon micro-electrolysis process of the iron-carbon filling chamber, so that the removal of pollutants in the water is realized. The sewage flows upwards from the bottom of the reactor body 1, overflows into the water outlet pipeline 12 through the water outlet 1-2, and flows into the water outlet tank 3.

The effluent water sample collected regularly is measured, and the removal rates of COD, TN and TP are calculated, and the result is shown in the table 1. Compared with a single bubble-free aeration device, the Fe/C-MABR reactor has obvious effect, and the total nitrogen removal rate can reach 90.74% at most. The ammonia nitrogen removal efficiency is slightly improved compared with the conventional MABR, and the total nitrogen and phosphate effects are remarkably improved.

The results of the sewage inflow and outflow quality of the experiment are shown in table 1.

TABLE 1

As shown in Table 1, the sewage treatment device and method of the application have ideal pollution removal effect, and compared with the traditional MABR, the bubbling-free aeration iron-carbon sludge membrane system of the application has good stability, thereby providing a reference for effectively removing total nitrogen and phosphate in the electronic-poor sewage.

Other compositions and connection relationships are the same as those of the first embodiment.

The foregoing is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art, who is within the scope of the present application, should make equivalent substitutions or modifications according to the technical scheme of the present application and the inventive concept thereof, and should be covered by the scope of the present application.

Claims

1. An iron-carbon mud film reinforced lean electronic sewage treatment device based on bubble-free aeration is characterized in that: including reactor main part (1), water inlet tank (2), play water tank (3), gas cylinder (4) and MABR membrane module (5), wherein, vertical porous division board (6) that have set firmly in reactor main part (1), it is iron carbon filling room and bubble-free aeration chamber to divide into about reactor main part (1) inside through porous division board (6), MABR membrane module (5) solid dress is in bubble-free aeration chamber, and is connected with gas cylinder (4) through air feed line (9), be provided with iron carbon micro-electrolysis filler (10) in the iron carbon filling room, water inlet tank (2) are connected to water inlet (1-1) of reactor main part (1) through water inlet line (11), water outlet tank (3) are connected to delivery port (1-2) of reactor main part (1) through water outlet line (12).

2. The bubble-free aeration-based iron carbon sludge membrane reinforced lean electronic sewage treatment device according to claim 1, wherein: the MABR membrane modules (5) are multiple in number and are fixedly arranged on one side wall of the reactor main body (1) side by side along the horizontal direction.

3. The bubble-free aeration-based iron carbon sludge membrane-enhanced lean electronic sewage treatment device according to claim 1 or 2, wherein: the MABR membrane component (5) adopts a hydrophobic organic membrane.

4. The bubble-free aeration-based iron carbon sludge membrane reinforced lean electronic sewage treatment device according to claim 1, wherein: the top cover of the reactor main body (1) is provided with a top cover (13).

5. The bubble-free aeration-based iron carbon sludge membrane reinforced lean electronic sewage treatment device according to claim 1, wherein: an air inlet valve (14), a pressure gauge (15) and a gas flowmeter (16) are arranged on the air supply pipeline (9).

6. The bubble-free aeration-based iron carbon sludge membrane reinforced lean electronic sewage treatment device according to claim 1, wherein: the water inlet pipeline (11) is provided with a water inlet valve (17), a water inlet pump (18) and a water inlet flowmeter (19), and the water outlet pipeline (12) is provided with a water outlet valve (20).

7. The bubble-free aeration-based iron carbon sludge membrane reinforced lean electronic sewage treatment device according to claim 1, wherein: the water inlet (1-1) and the water outlet (1-2) of the reactor main body (1) are respectively arranged on the front side wall and the rear side wall of the reactor main body (1), and the water inlet (1-1) is lower than the water outlet (1-2).

8. The bubble-free aeration-based iron carbon sludge membrane-enhanced lean electronic sewage treatment device according to claim 1 or 7, wherein: the diameter of the water outlet (1-2) is larger than or equal to the diameter of the water inlet (1-1).

9. A method of sewage treatment using the apparatus of any one of claims 1 to 8, characterized in that: the method comprises the following steps:

step one, raw water in a water inlet tank (2) enters a reactor main body (1) through a water inlet pipeline (11), and the ratio of the effective volume to the water inlet amount in the reactor main body (1) is set to be the hydraulic retention time by controlling the water inlet amount;

step two, the gas cylinder (4) carries out bubble-free aeration into the reactor main body (1) through a gas supply pipeline (9) and a membrane component;

step three, coupling the sewage in the reactor main body (1) with the microbial metabolism process of the biological film attached to the surface of the MABR membrane component (5) through the iron-carbon sludge micro-electrolysis process of the iron-carbon filling chamber, and cooperatively removing pollutants in the water;

and step four, the sewage in the reactor main body (1) is discharged into a water outlet tank (3) through a water outlet pipeline (12).

10. The sewage treatment method according to claim 9, wherein: the hydraulic retention time set in the first step is 8-48 h.