Integrated membrane coagulation reactor and its water treatment process

Abstract

The present invention relates to an integrated membrane coagulation reactor, comprising a water inlet pipe provided with a water inlet pump, a first reaction chamber connected to the water inlet pipe provided with a stirrer and a baffle, a first reagent area connected to the first reaction chamber, a second reaction chamber connected to the first reaction chamber provided with a stirrer and a baffle, a second reagent area connected to the second reaction chamber, a membrane pool connected to the second reaction chamber provided with an inclined plate, a third reagent area connected to the membrane pool, a mud discharge pipe connected to the bottom of the membrane pool provided with a mud discharge valve, a membrane assembly arranged in the membrane pool, a backwashing device connected to the bottom of the membrane assembly, and a water outlet pipe connected to the top of the membrane assembly provided with a suction pump. The integrated membrane coagulation reactor of the present invention can efficiently remove pollutants, and the integrated membrane coagulation reactor of the present invention also has the advantages of small footprint, low energy consumption, convenient mud discharge, etc.

Description

Technical Field

[0001] The invention specifically relates to an integrated membrane coagulation reactor and a water treatment process thereof. Background Art

[0002] The traditional water treatment process is represented by "coagulation → sedimentation → filtration → chlorination disinfection", which mainly removes turbidity and pathogens in raw water, and can basically eliminate the outbreak of waterborne diseases. In recent decades, with the rapid economic development and the improvement of people's living standards, more and more domestic water sources have been polluted to varying degrees. The pollutants in water sources are of various types and complex in nature, which has led to further deterioration of water quality in water sources. With the intensification of water source pollution and people's increasingly stringent requirements for water quality, traditional water treatment processes can no longer guarantee the safety of drinking water quality. To solve this problem, it is often necessary to add new water treatment units on the basis of the original traditional process, or to strengthen the original process. At present, membrane technology is considered to be the most promising method. In recent years, due to the decline in material prices and the improvement of performance, it has been widely used in the field of water treatment.

[0003] The membrane coagulation reactor combines coagulation and membrane separation technology. It replaces the sedimentation and filtration units in the traditional process with membrane separation. Coagulation can remove suspended solids and colloids in the water, while membrane separation can ensure that the turbidity of the effluent meets the standard. For the membrane coagulation reactor, since there is no sedimentation unit, it occupies a smaller area than the conventional membrane combination process. After coagulation, the pollutants directly enter the membrane treatment system. The particles are large and not easy to clog the membrane pores. The degree of membrane pollution is relatively light, but the particles in the membrane pool are easy to precipitate, which will lead to a large amount and frequency of sludge discharge. In addition, in order to ensure the treatment effect, an agitator is required to stir the water in the coagulation reaction tank. When the amount of water to be treated is large, the energy consumption increases greatly, resulting in an increase in water treatment costs.

[0004] Patent application No. 2016105295037 discloses an integrated membrane coagulation reactor (MCR) and a water treatment process, which can greatly reduce the floor space by placing the coagulation device and the submerged membrane assembly in the same membrane tank. The integrated membrane coagulation reactor disclosed by the invention can efficiently remove dissolved organic carbon in the water to be treated, but the ammonia nitrogen removal effect is not ideal. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated membrane coagulation reactor and a water treatment process thereof which has a small footprint, low energy consumption, convenient sludge discharge and can efficiently remove pollutants.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The first aspect of the present invention provides an integrated membrane coagulation reactor, including a water inlet pipe provided with a water inlet pump, a first reaction chamber connected to the water inlet pipe and provided with an agitator and a baffle, a first reagent area connected to the first reaction chamber for preparing a coagulant, a second reaction chamber connected to the first reaction chamber and provided with an agitator and a baffle, a second reagent area connected to the second reaction chamber for preparing an oxidant, a membrane pool connected to the second reaction chamber and provided with an inclined plate, a third reagent area connected to the membrane pool and used for preparing an adsorbent, a mud discharge pipe connected to the bottom of the membrane pool and provided with a mud discharge valve, a membrane assembly arranged in the membrane pool, a backwashing device connected to the bottom of the membrane assembly and used for backwashing the membrane assembly, and a water outlet pipe connected to the top of the membrane assembly and provided with a suction pump.

[0008] The integrated membrane coagulation reactor of the present invention can efficiently remove ammonia nitrogen while ensuring efficient removal of suspended matter and dissolved organic carbon, and has the advantages of small footprint, low energy consumption, convenient sludge discharge, etc.

[0009] Preferably, the first reaction chamber, the second reaction chamber, and the membrane pool are connected as a whole, that is, the reaction chambers are separated by isolation components and connected by overflow or the like, rather than setting each reaction chamber as a plurality of independent reaction chambers, which are connected by pipelines. The integrated setting can effectively reduce the floor space, make the operation and management of the reactor more convenient, and further reduce the operation cost.

[0010] Further preferably, the first reaction chamber and the second reaction chamber are separated by a first isolation component, and the upper end of the first isolation component is provided with a first overflow port for connecting the first reaction chamber and the second reaction chamber; the second reaction chamber and the membrane pool are separated by a second isolation component and a third isolation component, and an overflow channel is formed between the second isolation component and the third isolation component, and the lower end of the second isolation component is provided with an opening for connecting the second reaction chamber and the overflow channel, and the upper end of the third isolation component is provided with a second overflow port for connecting the overflow channel and the membrane pool. Separating the first reaction chamber, the second reaction chamber, and the membrane pool by isolation components can not only improve the water treatment effect, but also effectively alleviate the problems of membrane module pollution, blockage, etc.

[0011] Preferably, the baffles are arranged on the inner walls of both sides of the first reaction chamber and the second reaction chamber in a staggered manner. When the agitator is running, the baffles arranged on the inner walls of both sides of the first reaction chamber and the second reaction chamber facilitate the flow of water in the first reaction chamber and the second reaction chamber, thereby reducing energy consumption and saving 20-30% of the amount of flocculant used under the same diffusion effect.

[0012] Preferably, the interval between two adjacent baffles on different sides is 20 to 30 cm.

[0013] Preferably, the inclined plate is located at the bottom of the membrane pool, and the angle between the inclined plate and the bottom of the membrane pool is 20-30 degrees, and the angle is away from the side of the membrane pool connected to the mud discharge pipe. The inclined plate arranged at the bottom of the membrane pool can collect sediment at the lower end of the side connected to the mud discharge pipe, which is conducive to the sediment automatically flowing into the mud discharge pipe under the action of gravity and water flow, making mud discharge more convenient.

[0014] In the present invention, the membrane material used in the membrane assembly includes but is not limited to one of polyvinylidene fluoride and polyvinyl chloride, and the pore size of the membrane is 0.5 to 5.0 μm.

[0015] Preferably, the backwashing device comprises a water delivery pipeline connected to the bottom of the membrane assembly and provided with a backwashing pump for delivering backwashing water, an air pipeline connected to the bottom of the membrane assembly, and a backwashing fan connected to the air pipeline for providing backwashing air. In order to ensure the membrane treatment efficiency, the membrane assembly needs to be backwashed by the backwashing device.

[0016] Preferably, the integrated membrane coagulation reactor further comprises a water storage tank for temporarily storing the treated water, and the water storage tank is connected to the backwashing device. Using the treated water in the water storage tank as backwashing water can reduce the waste of water resources.

[0017] Preferably, the coagulant is an inorganic coagulant, the inorganic coagulant is an aluminum salt coagulant, the aluminum salt coagulant is polyaluminum chloride, the oxidant is sodium hypochlorite, and the adsorbent is activated carbon. Sodium hypochlorite can effectively remove ammonia nitrogen in the water in a short time, and activated carbon can adsorb excess sodium hypochlorite in the water, thereby achieving the effect of efficiently removing ammonia nitrogen in the water without introducing other pollutants.

[0018] The water inlet pipe in the present invention can be directly connected to river water bodies, landscape water bodies, and domestic sewage water bodies waiting to be treated, or one or more of the river water bodies, landscape water bodies, and domestic sewage water bodies to be treated can be passed into the intermediate water pool, and then the water inlet pipe is connected to the intermediate water pool.

[0019] The water outlet pipe in the present invention can be directly connected to a river water body, a landscape water body, etc., and the effluent treated by the integrated membrane coagulation reactor can be used directly.

[0020] The second aspect of the present invention also provides an application of the integrated membrane coagulation reactor in improving the water quality of rivers and / or landscape water bodies and treating domestic sewage.

[0021] The third aspect of the present invention also provides a water treatment process, which adopts the integrated membrane coagulation reactor for water treatment, including the following steps: the water to be treated flows into the first reaction chamber where a coagulant is added, flows into the second reaction chamber where an oxidant is added after coagulation treatment, flows into the membrane pool where an adsorbent is added after oxidation-reduction treatment, and obtains the treated water after adsorption treatment through the membrane assembly.

[0022] In the present invention, the water body to be treated is one of river water bodies, landscape water bodies, and domestic sewage, or a mixture of several of them.

[0023] Preferably, the inlet flow rate of the water to be treated is 60 L / h to 100 L / h.

[0024] Preferably, the residence time of the water to be treated in the first reaction chamber is 60 to 180 seconds.

[0025] Preferably, the residence time in the second reaction chamber is 60 to 180 seconds.

[0026] Preferably, the residence time in the membrane pool is 15 to 30 minutes.

[0027] Preferably, the dosage of the coagulant is 5-20 mg / L.

[0028] Preferably, the dosage of the oxidant is calculated based on a chlorine to nitrogen molar ratio of 0.8 to 2.0:1.

[0029] Preferably, the adsorbent dosage is 5-25 mg / L.

[0030] Preferably, the membrane assembly is backwashed regularly or irregularly to ensure the membrane treatment effect and extend the service life of the membrane assembly.

[0031] Preferably, the backwashing time of the membrane assembly is 30 to 45 minutes.

[0032] Preferably, the backwash water rate is 2 to 4 times the water inlet rate.

[0033] Preferably, the cleaning frequency is once every 5 to 10 days.

[0034] The integrated membrane coagulation reactor of the present invention integrates coagulation treatment, oxidation-reduction treatment and membrane treatment, effectively reducing the footprint of the reactor, making the operation and management of the reactor more convenient and further reducing the operation cost.

[0035] The integrated membrane coagulation reactor of the present invention, by staggeredly arranging baffles on the inner walls on both sides of the first reaction chamber and the second reaction chamber, helps the flow of water in the first reaction chamber and the second reaction chamber when the agitator is running, thereby reducing energy consumption and saving 20-30% of the flocculant usage under the same diffusion effect.

[0036] The integrated membrane coagulation reactor of the present invention can collect sediment at the lower end of one side connected to the mud discharge pipe through the inclined plate arranged at the bottom of the membrane pool, which is conducive to the sediment automatically flowing into the mud discharge pipe under the action of gravity and water flow, making mud discharge more convenient.

[0037] The water treatment process of the integrated membrane coagulation reactor of the present invention efficiently removes ammonia nitrogen in the water body by adding an oxidation-reduction reaction. Sodium hypochlorite is first used to remove ammonia nitrogen, and then activated carbon can adsorb excess sodium hypochlorite in the water body, thereby achieving the effect of efficiently removing ammonia nitrogen in the water body without introducing other pollutants, thereby further improving the water quality.

[0038] The water treatment process of the integrated membrane coagulation reactor of the present invention arranges the redox treatment after the coagulation treatment, which can save 25-35% of the oxidant usage compared with the setting of the coagulation treatment before the redox treatment; compared with the setting of the redox treatment after the membrane treatment, it can prevent the problem of the excess residual chlorine in the effluent water affecting the water quality.

[0039] Compared with the prior art, the present invention has the following advantages: the integrated membrane coagulation reactor and the water treatment process of the present invention can efficiently remove ammonia nitrogen and further improve water quality; can effectively reduce the floor space and can reduce energy consumption and operating costs; the use of the integrated membrane coagulation reactor of the present invention can reduce the amount and frequency of sludge discharge while making sludge discharge more convenient, thereby reducing the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Attached Figure 1 ; Schematic diagram of an integrated membrane coagulation reactor according to an embodiment of the present invention;

[0041] Attached Figure 1 1. water inlet pipe; 2. water inlet pump; 3. first reaction chamber; 4. second reaction chamber; 5. membrane pool; 6. membrane assembly; 7. water outlet pipe; 8. suction pump; 9. water storage tank; 10. inclined plate; 11. first reagent area; 12. second reagent area; 13. third reagent area; 14. raw water tank; 15. dosing pump; 16. dosing pipe; 17. agitator; 18. baffle; 19. first isolation component; 20. second isolation component; 21. third isolation component; 22. first overflow port; 23. second overflow port; 24. mud discharge pipe; 25. mud discharge valve; 26. air duct; 27. backwash fan; 28. water pipeline; 29. ​​backwash pump DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the embodiments shown in the accompanying drawings. Unless otherwise expressly described in the text as incompatible with combination, the various features may be combined as needed.

[0043] The directional words of up, down, left, and right in the present invention are based on the reviewer facing Figure 1 The direction is taken as the standard, where the side where the water inlet pipe 1 is located is the left, and the side where the water outlet pipe 7 is located is the right.

[0044] Example 1

[0045] like Figure 1 The integrated membrane coagulation reactor shown includes a water inlet pipe 1 provided with a water inlet pump 2, a first reaction chamber 3 connected to the water inlet pipe 1 and provided with a stirrer 17 and a baffle 18, a first reagent area 11 connected to the first reaction chamber 3 for preparing a coagulant, a second reaction chamber 4 connected to the first reaction chamber 3 and provided with a stirrer 17 and a baffle 18, a second reagent area 12 connected to the second reaction chamber 4 for preparing an oxidant, a membrane pool 5 connected to the second reaction chamber 4 and provided with an inclined plate 10, a third reagent area 13 connected to the membrane pool 5 for preparing an adsorbent, a mud discharge pipe 24 connected to the bottom of the membrane pool 5 and provided with a mud discharge valve 25, a membrane assembly 6 arranged in the membrane pool 5, a backwashing device connected to the bottom of the membrane assembly 6 for backwashing the membrane assembly 6, and a water outlet pipe 7 connected to the top of the membrane assembly 6 and provided with a suction pump 8.

[0046] According to a specific embodiment, Figure 1 As shown, one end of the water inlet pipe 1 provided with a water inlet pump 2 is connected to the raw water pool 14 where the water to be treated is located, and the other end of the water inlet pipe 1 is connected to the upper end of the first reaction chamber 3, and the water to be treated is pumped into the first reaction chamber 3 by the water inlet pump 2. The raw water pool 14 is an intermediate water pool loaded with the water to be treated, or is directly a river, a pool or a container where the water to be treated is located.

[0047] The upper end of the first reaction chamber 3 is also connected to a dosing pipe 16 provided with a dosing pump 15, and the other end of the dosing pipe 16 is connected to the first reagent area 11 for preparing a coagulant. A stirrer 17 is provided at the center of the first reaction chamber 3. Two baffles 18 are symmetrically arranged on the left inner wall of the first reaction chamber 3, and a baffle 18 is arranged on the right inner wall of the first reaction chamber 3 at the middle position corresponding to the two baffles 18 on the left inner wall. The interval between the two adjacent baffles 18 on different sides is preferably 20 to 30 cm. In this example, the interval is 20 cm. When the stirrer 17 is working, the setting of the baffle 18 is conducive to the flow of water in the first reaction chamber 3, and energy consumption can be reduced under the condition of the same diffusion effect. The first reaction chamber 3 and the second reaction chamber 4 are separated by a first isolation component 19, which is a common side wall of the first reaction chamber 3 and the second reaction chamber 4. The upper end of the first isolation component 19 is provided with a first overflow port 22 for connecting the first reaction chamber 3 and the second reaction chamber 4. The water in the first reaction chamber 3 flows into the second reaction chamber 4 through overflow. The water flows out by its own gravity at a certain height difference, and the water flow is more stable. In this embodiment, the isolation component is a partition, which has the advantages of easy installation and low cost.

[0048] The upper end of the second reaction chamber 4 is connected to a dosing pipe 16 provided with a dosing pump 15, and the other end of the dosing pipe 16 is connected to the second reagent area 12 for preparing the oxidant. A stirrer 17 is provided at the center of the second reaction chamber 4. A baffle plate 18 is provided on the left inner wall of the second reaction chamber 4, and two baffle plates 18 are provided on the right inner wall of the second reaction chamber 4. The interval between the two adjacent baffle plates 18 on different sides is preferably 20 to 30 cm. In this example, the interval is 20 cm. When the stirrer 17 is working, it is conducive to the flow of water in the second reaction chamber 4, and energy consumption can be reduced under the condition of the same diffusion effect. The second reaction chamber 4 and the membrane pool 5 are separated by the second isolation component 20 and the third isolation component 21. The second isolation component 20 is the right side wall of the second reaction chamber 4, and the third isolation component 21 is the left side wall of the membrane pool 5. An overflow channel is formed between the second isolation component 20 and the third isolation component 21. The lower end of the second isolation component 20 is provided with an opening for connecting the second reaction chamber 4 and the overflow channel. The upper end of the third isolation component 21 is provided with a second overflow port 23 for connecting the overflow channel and the membrane pool 5. The water in the second reaction chamber 4 enters the membrane pool 5 by overflow. By setting the overflow channel, the residence time can be increased, and the water quality can be made more uniform and stable. In this embodiment, the isolation component is a partition.

[0049] The upper end of the membrane pool 5 is connected to a dosing pipe 16 provided with a dosing pump 15, and the other end of the dosing pipe 16 is connected to the third reagent area 13 for preparing the adsorbent. An inclined plate 10 is provided at the bottom of the membrane pool 5, the left end of the inclined plate 10 is arranged on the left inner wall of the membrane pool 5, and the right end of the inclined plate 10 intersects with the bottom of the membrane pool 5 and the right side wall of the membrane pool 5. The angle formed by the inclined plate 10 and the bottom of the membrane pool 5 is preferably 20-30°. In this embodiment, the angle is 20°. The lower end of the right side wall of the membrane pool 5 is connected to the mud discharge pipe 24 provided with a mud discharge valve 25. The sediment on the inclined plate 10 is automatically collected at the lower right corner of the membrane pool 5 and automatically flows into the pipe mouth of the mud discharge pipe 24 under the action of gravity and water flow. A membrane assembly 6 is provided in the membrane pool 5, and the membrane assembly 6 is located above the inclined plate 10. In this embodiment, the membrane material used in the membrane assembly 6 is polyvinylidene fluoride, and the membrane pore size is 2μm. The top of the membrane assembly 6 is connected to the water outlet pipe 7 provided with a suction pump 8, and the other end of the water outlet pipe 7 is connected to the water storage tank 9 for temporarily storing the treated water. Of course, in other embodiments, the treated water can also be directly sent to the application site through the water outlet pipe 7. The bottom of the membrane assembly 6 is connected to the air duct 26 of the backwashing device, and the other end of the air duct 26 extends out of the right side wall of the membrane tank 5 and is connected to the backwashing fan 27. The bottom of the right side wall of the membrane assembly 6 is connected to the water delivery pipe 28 of the backwashing device provided with a backwashing pump 29, and the other end of the water delivery pipe 28 is connected to the bottom of the water storage tank 9. Using the treated water in the water storage tank 9 as backwashing water can reduce the waste of water resources. Of course, in other embodiments, if the water storage tank 9 is not provided, the water delivery pipe 28 can also be connected to the water outlet pipe 7.

[0050] Example 2

[0051] The integrated membrane coagulation reactor of Example 1 was used to treat raw water. The turbidity of the water to be treated was 34.8NTU, COD was 29.86mg / L, and ammonia nitrogen content was 3.783mg / L. The water to be treated entered the first reaction chamber 3 at an inlet flow rate of 90L / h, the dosage of polyaluminium chloride (PAC) in the first reaction chamber 3 was 15mg / L, and the residence time in the first reaction chamber 3 was 120s, and then entered the second reaction chamber 4, sodium hypochlorite was added in the second reaction chamber 4 according to Cl:N=2:1, and the residence time in the second reaction chamber 4 was 120s, and then entered the membrane pool 5, the dosage of activated carbon in the membrane pool 5 was 20mg / L, and the residence time in the membrane pool 5 was 30min, and the water was passed through the membrane. After testing, the turbidity, COD, and ammonia nitrogen removal rates of the effluent were 99%, 72%, and 81%, respectively.

[0052] In the present invention, turbidity detection adopts turbidimeter method (HJ 1075-2019); COD detection adopts dichromate rapid digestion-photometry (HJ 924-2017); ammonia nitrogen detection adopts Nessler reagent spectrophotometry (HJ 535-2009).

[0053] Example 3

[0054] The method is basically the same as Example 2, except that the dosage of polyaluminium chloride (PAC) is 10mg / L and the dosage of activated carbon is 15mg / L. After testing, the effluent turbidity, COD and ammonia nitrogen removal rates are 99%, 63% and 70% respectively.

[0055] Example 4

[0056] The method is basically the same as Example 2, except that sodium hypochlorite is added at a ratio of (Cl:N=3:2). After testing, the effluent turbidity, COD, and ammonia nitrogen removal rates are 99%, 55%, and 61%, respectively.

[0057] Comparative Example 1

[0058] The raw water was treated by a conventional coagulation membrane treatment process (conventional equipment of a common coagulation unit, a sedimentation unit and a membrane treatment unit), and the water to be treated was the same as that in Example 2.

[0059] The water to be treated enters the coagulation reaction chamber at an inlet flow rate of 90L / h, the dosage of polyaluminium chloride (PAC) is 15mg / L, the residence time in the coagulation reaction chamber is 120s, and then enters the membrane reaction chamber, the residence time is 30min. After testing, the effluent turbidity, COD, and ammonia nitrogen removal rates are 99%, 26%, and 14% respectively.

[0060] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated membrane coagulation reactor, characterized in that: The invention comprises a water inlet pipe (1) provided with a water inlet pump (2), a first reaction chamber (3) connected to the water inlet pipe (1) and provided with a stirrer (17) and a baffle (18), a first reagent area (11) connected to the first reaction chamber (3) and used for preparing a coagulant, a second reaction chamber (4) connected to the first reaction chamber (3) and provided with a stirrer (17) and a baffle (18), a second reagent area (12) connected to the second reaction chamber (4) and used for preparing an oxidant, and a first reagent area (13) connected to the second reaction chamber (14) and used for preparing an oxidant. 4) a membrane pool (5) provided with an inclined plate (10) connected thereto, a third reagent area (13) for preparing an adsorbent connected thereto, a mud discharge pipe (24) provided with a mud discharge valve (25) connected thereto at the bottom of the membrane pool (5), a membrane assembly (6) arranged in the membrane pool (5), a backwashing device for backwashing the membrane assembly (6) connected thereto at the bottom of the membrane assembly (6), and a water outlet pipe (7) provided with a suction pump (8) connected thereto at the top of the membrane assembly (6), wherein the first A reaction chamber (3), the second reaction chamber (4), and the membrane pool (5) are connected as a whole; the first reaction chamber (3) and the second reaction chamber (4) are separated by a first isolation component (19); the upper end of the first isolation component (19) is provided with a first overflow port (22) for connecting the first reaction chamber (3) and the second reaction chamber (4); the second reaction chamber (4) and the membrane pool (5) are separated by a second isolation component (20) and a third isolation component (21); an overflow channel is formed between the second isolation component (20) and the third isolation component (21); the lower end of the second isolation component is provided with an opening for connecting the second reaction chamber (4) and the overflow channel; the upper end of the third isolation component is provided with a second overflow port (23) for connecting the overflow channel and the membrane pool (5); the baffles (18) are staggeredly arranged on the inner walls of both sides of the first reaction chamber (3) and the second reaction chamber (4); the interval between two adjacent baffles (18) on different sides is 20 to 30 cm.

2. The integrated membrane coagulation reactor according to claim 1, characterized in that: The inclined plate (10) is located at the bottom of the membrane pool (5), and the angle between the inclined plate (10) and the bottom of the membrane pool (5) is 20 to 30 degrees, and the angle is away from the side of the membrane pool (5) connected to the mud discharge pipe (24).

3. The integrated membrane coagulation reactor according to claim 1, characterized in that: The backwashing device comprises a water delivery pipe (28) connected to the bottom of the membrane assembly (6) and provided with a backwash pump (29) for delivering backwash water, an air pipe (26) connected to the bottom of the membrane assembly (6), and a backwash fan (27) connected to the air pipe (26) for providing backwash air.

4. The integrated membrane coagulation reactor according to claim 1 or 3, characterized in that: The integrated membrane coagulation reactor further comprises a water storage tank (9) for temporarily storing treated water, and the water storage tank (9) is connected to the backwashing device.

5. The integrated membrane coagulation reactor according to claim 1, characterized in that: The coagulant is an inorganic coagulant, the inorganic coagulant is an aluminum salt coagulant, the aluminum salt coagulant is polyaluminum chloride, the oxidant is sodium hypochlorite, and the adsorbent is activated carbon.

6. Use of the integrated membrane coagulation reactor as described in any one of claims 1 to 5 in improving the water quality of rivers and / or landscape water bodies and treating domestic sewage.

7. A water treatment process using an integrated membrane coagulation reactor, characterized in that: The integrated membrane coagulation reactor according to any one of claims 1 to 5 is used for water treatment, and the steps include: the water to be treated flows into a first reaction chamber (3) in which a coagulant is added, flows into a second reaction chamber (4) in which an oxidant is added after coagulation treatment, flows into a membrane pool (5) in which an adsorbent is added after oxidation-reduction treatment, and passes through a membrane assembly (6) after adsorption treatment to obtain treated water.

8. The water treatment process according to claim 7, characterized in that: The water body to be treated is one of river water bodies, landscape water bodies, and domestic sewage, or a mixture of several of them.

9. The water treatment process according to claim 7, characterized in that: The inlet flow rate of the water to be treated is 60L / h to 100L / h, the residence time of the water to be treated in the first reaction chamber (3) is 60 to 180 seconds, the residence time in the second reaction chamber (4) is 60 to 180 seconds, and the residence time in the membrane pool (5) is 15 to 45 minutes.

10. The water treatment process according to claim 7, characterized in that: The dosage of the coagulant is 5 to 20 mg / L, the dosage of the oxidant is calculated based on a chlorine-nitrogen molar ratio of 0.8 to 2.0:1, and the dosage of the adsorbent is 5 to 25 mg / L.

11. The water treatment process according to claim 7, characterized in that: The membrane assembly (6) is backwashed regularly or irregularly, the backwashing time of the membrane assembly (6) is 30 to 45 minutes, the backwashing water rate is 2 to 4 times the water inlet rate, and the cleaning frequency is once every 5 to 10 days.

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