Hydrophilic round and square membrane bed biological purification system and method

Abstract

The invention discloses a hydrophilic round-square membrane bed biological purification system and method.The hydrophilic round-square membrane bed biological purification system comprises an aerobic main body reaction unit, a unit inlet overflowing pipe part is arranged at one end of the aerobic main body reaction unit, a unit outlet overflowing pipe part is arranged at the other end of the aerobic main body reaction unit, and a water overflowing arc wall component is arranged in the aerobic main body reaction unit; the water passing arc wall part comprises a front-area medicine mixing arc wall part, an intercepting, filtering and purifying arc wall part and a rear-area medicine mixing arc wall part, the water round and square membrane bed part is arranged between the front-area medicine mixing arc wall part and the intercepting, filtering and purifying arc wall part, and an air inlet of the water round and square membrane bed part is connected with the aeration oxygen supply part; a medicine inlet of the front-area medicine mixing arc wall part and a medicine inlet of the rear-area medicine mixing arc wall part are connected with front and rear medicine adding parts; the method provided by the invention can efficiently and quickly cope with organic or inorganic pollutants of normal-chain functional groups entrained in incoming water in an energy-saving and low-consumption manner.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage and wastewater treatment and purification, and in particular to a hydrophilic circular and square membrane bed biological purification system and method. Background Art

[0002] The existing conventional activated sludge (AS) process is difficult to adapt to the complex changes of the influent water and the living environment. The proportion of sludge bio-organic matter in the biochemical treatment unit is often lower than 0.6. The number of active bacteria agents in the sludge flocs is low, and it is difficult for heterotrophic or autotrophic zoogloea degradation bacteria to occupy an absolute advantage. It is difficult to form a symbiotic degradation food chain environment for mixed bacteria communities. Based on the in-situ conditions of the biochemical treatment and sedimentation separation system, the pollutant removal load for coping with complex working conditions is low, and it is difficult to stably maintain indicators such as ammonia nitrogen, TP, and COD below Class A. The biological degradation ability of existing facilities to cope with organic or inorganic pollutants (or new pollutants) with normal-chain functional groups, bactericidal and biostatic properties carried in the influent water will be severely hindered. The sludge sedimentation ratio exceeds 60%, and the sedimentation performance is poor. Sludge loss and floating flocs are likely to occur in the secondary sedimentation tank. In order to maintain a high pollution removal efficiency (such as when the influent ammonia nitrogen mass concentration exceeds 50 mg / L or above), it is necessary to add emergency agents or expensive specific agents, or increase the biochemical sludge concentration by more than one time (the biochemical sludge concentration stays at 8000 mg / L or above under abnormal working conditions) in order to achieve a single-stage sludge multiplication and hope for improvement. As a result, the energy consumption of biochemical aeration is high, the drug consumption for nitrogen and phosphorus removal increases, the greenhouse gas carbon emission (carbon emission intensity) increases, and the inorganic surplus sludge production rate of the biochemical process is relatively high. The sludge has a long sludge age in the biochemical system, resulting in sludge aging. It is difficult to further improve and tap the potential of the nitrification removal load and total emission reduction of the treatment system under the transient peak conditions of water volume and water quality. Based on the in-situ biochemical process, it is difficult to fully expand the capacity, improve the standard and synergistically increase the efficiency. Therefore, there is no reliable guarantee for the pollutant removal compliance buffer under emergency adverse working conditions such as continuous over-water load for several days during the flood season, or sudden continuous water quality shock load for several days, or continuous low water temperature load (10-15°C) for several months in winter. Moreover, it is impossible to avoid the risk of sludge running away with water from the end of the biochemical sedimentation separation unit, and causing the rebound of particulate pollutants such as SS and TP to exceed the standard. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above deficiencies and provide a hydrophilic circular and square membrane bed biological purification system and method to solve the problems raised in the background art.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a hydrophilic circular square membrane bed biological purification system, including an aerobic main reaction unit. One end of the aerobic main reaction unit is provided with a unit inlet flow-through pipe part, and the other end is provided with a unit outlet flow-through pipe part. Inside the aerobic main reaction unit, there is a water flow-through arc wall component, which includes a front-zone medicine-mixing arc wall part, a filtration and purification arc wall part, and a rear-zone medicine-mixing arc wall part. Between the front-zone medicine-mixing arc wall part and the filtration and purification arc wall part, there is a water circular square membrane bed component. The air inlet of the water circular square membrane bed component is connected to an aeration and oxygen supply component, and the medicine inlets of the front-zone medicine-mixing arc wall part and the rear-zone medicine-mixing arc wall part are both connected to a front and rear dosing component.

[0005] Preferably, the front-zone medicine-mixing arc wall part and the rear-zone medicine-mixing arc wall part are both of an arc-shaped hollow cavity structure as a whole. Their tops and bottoms are open and the sides are closed. The sandwich space of their arc-shaped hollow cavities forms a fluid channel for the flowing-through fluid; the filtration and purification arc wall part is of a hollow cage structure as a whole.

[0006] Preferably, the front-zone medicine-mixing arc wall part includes a front-zone lower bottom C-shaped arc cross-section, a front-zone upper top C-shaped arc cross-section, and a front-zone side-rolled arc vertical wall part that are combined together. Both the front-zone lower bottom C-shaped arc cross-section and the front-zone upper top C-shaped arc cross-section are filter screen structures; the filtration and purification arc wall part includes a filtration lower bottom C-shaped arc cross-section, a filtration upper top C-shaped arc cross-section, and a filtration side-rolled arc vertical wall part that are combined together. The filtration lower bottom C-shaped arc cross-section, the filtration upper top C-shaped arc cross-section, and the filtration side-rolled arc vertical wall part are all filter screen structures; the rear-zone medicine-mixing arc wall part includes a rear-zone lower bottom C-shaped arc cross-section, a rear-zone upper top C-shaped arc cross-section, and a rear-zone side-rolled arc vertical wall part that are combined together. Both the rear-zone lower bottom C-shaped arc cross-section and the rear-zone upper top C-shaped arc cross-section are filter screen structures, and the filtration and purification arc wall part is filled with filter media.

[0007] Preferably, on one side of the filtration and purification arc wall part, there is also a water countercurrent flushing component that cooperates with it. The water countercurrent flushing component includes a water washing pump component. One side of the water washing pump component is connected to a water suction pipe fitting, and the other end is connected to a water pressure pipe fitting. The water suction port of the water suction pipe fitting is located between the filtration and purification arc wall part and the rear-zone medicine-mixing arc wall part. The air inlet of the filtration and purification arc wall part is connected to the air outlet of the aeration and oxygen supply component. The outlet of the water pressure pipe fitting and the air outlet of the aeration and oxygen supply component are both provided with one-way valves.

[0008] Preferably, a through-flow pipe fitting is also penetrated on the surface of the filtration and purification arc wall part. The through-flow pipe fitting includes a connecting pipe section part penetrated on the surface of the filtration and purification arc wall part. One end of the connecting pipe section part is an inflow port part, and the other end is an outflow port part; a one-way movable plug plate that cooperates with it is hinged at the inflow port part, and the one-way movable plug plate is connected to a pulling rope.

[0009] Preferably, the water round-square membrane bed component includes a plurality of hydrophilic filler membrane bed cages and empty cages arranged alternately. A filler membrane is provided in the hydrophilic filler membrane bed cage, and fillers are provided in the filler membrane.

[0010] Preferably, the hydrophilic filler membrane bed cages and the empty cages are arranged in the aerobic main reaction unit through a column hanging wall component. The column hanging wall component includes a vertically arranged column. The periphery of the column is fixedly connected to the hydrophilic filler membrane bed cage or the empty cage respectively through a horizontally arranged short hanging rod, and the short hanging rod cooperates with a hoisting component.

[0011] Preferably, the hydrophilic filler membrane bed cages and the empty cages are arranged in the aerobic main reaction unit through a floating drum connecting rod component. The floating drum connecting rod component includes a circular floating drum component. The circular floating drum component is connected to the hydrophilic filler membrane bed cage or the empty cage through a horizontal connecting rod component, and the circular floating drum component cooperates with a hoisting component.

[0012] Preferably, the aeration and oxygen supply component includes an aeration induced draft fan. The aeration induced draft fan is connected to the front reaction zone aeration pipe component, the rear reaction zone gradually reducing aeration pipe component, the filler fluidization pipe component, and the post-precision filter material scrubbing and maintenance pipe component respectively through a main aeration pipe component. The front reaction zone aeration pipe component includes a front reaction zone pipeline control valve and each front reaction zone distribution pipe arranged along the flow direction. The rear reaction zone gradually reducing aeration pipe component includes a rear reaction zone pipeline control valve and each rear reaction zone distribution pipe arranged along the flow direction. The filler fluidization pipe component includes a filler fluidization pipeline control valve and each filler fluidization distribution pipe arranged along the flow direction. The filler fluidization distribution pipe includes a front reaction zone filler fluidization distribution pipe and a rear reaction zone filler fluidization distribution pipe. The post-precision filter material scrubbing and maintenance pipe component includes a post-precision filter material scrubbing and maintenance pipeline control valve, a one-way valve, a main pipe, and an arc-shaped distribution pipe arranged at the bottom center of the intercepting and filtering purification arc wall part.

[0013] Preferably, it further includes a two-position reflux component. The two-position reflux component includes a centrifugal pump delivery component and pump inlet and outlet pipe fittings. The pump inlet and outlet pipe fittings include a first inlet pipe fitting and a second inlet pipe fitting. Corresponding control valves are provided on both the first inlet pipe fitting and the second inlet pipe fitting. The first inlet pipe fitting is communicated with the near end of the reaction rear zone of the aerobic main reaction unit, and the second inlet pipe fitting is communicated with the area between the intercepting and filtering purification arc wall part and the rear zone mixing medicine arc wall part.

[0014] Preferably, the front and rear dosing components include a front dosing component and a rear dosing component. Both the front dosing component and the rear dosing component include a dosing pump part and corresponding conveying pipes. The front dosing component is used for dosing to the front zone mixing medicine arc wall part, and the rear dosing component is used for dosing to the rear zone mixing medicine arc wall part.

[0015] In addition, the present invention also discloses a purification method for the above hydrophilic circular square membrane bed biological purification system, which comprises the following steps: S1. Sewage enters the front zone chemical mixing arc wall part through the unit inlet overflow pipe part. After the pre-added chemical components input chemicals and mix with the sewage inside the front zone chemical mixing arc wall part, it enters the aerobic main reaction unit from the bottom of the pool; S2. In the aerobic main reaction unit, the sewage enters the overall packing composed of a plurality of alternately arranged hydrophilic packing membrane bed cages and empty cages in the overall packing through the staggered flow channels, so that the sewage evenly enters the overall packing; S3. The sewage passing through the aerobic main reaction unit is filtered by the intercepting and purifying arc wall part and then enters the water outlet area. Then, a part of the sewage is used as circulating liquid and refluxed to the anoxic zone through the two-position reflux component; S4. Another part of the sewage enters the arc-shaped interlayer from the bottom of the rear zone chemical mixing arc wall part, then mixes with the chemicals input by the post-added chemical components in the interlayer, and finally is discharged from the top and discharged through the unit outlet overflow pipe part.

[0016] Advantages of the present invention: Based on the change of process parameter requirements, the present invention flexibly realizes the in-situ feeding and replacement of the cage type, and adopts different on-site installation modes such as the fixation method, the column hanging wall type, the mobile floating barrel type, etc. in combination with the application scenarios, which can efficiently, quickly, energy-saving and low-consumption cope with the organic or inorganic pollutants (or new pollutants) with normal chain functional groups entrained in the influent water, and the biodegradation and antagonistic effects of bactericidal and biostatic properties are improved. Its sludge sedimentation ratio SV30 drops to the range of 15% - 40%, the effective attached degradation bacteria mass increases by 20% - 40% compared with the traditional activated sludge method, the discharge of excess sludge is reduced by more than 20%, the nitrification removal load and total emission reduction under the transient peak working conditions of water volume and quality are increased by more than 30%, based on the biochemical in-situ potential tapping, the potential of fully expanding capacity, improving standard and synergistic efficiency may reach more than 40%, realizing that the tail water is better than the discharge standard of Class A of the first level, effectively coping with the pollutant removal compliance buffer guarantee rate under the conditions of continuous over-water load of 30% - 60% for several days during the flood season, or sudden continuous water quality impact load of 20% - 50% for several days, or low water temperature load (10 - 15 °C) for several months in winter, and effectively avoiding the risk of sludge easily running off with water from the end of the self-biological precipitation separation unit and causing the rebound and exceeding the standard of particulate pollutants such as SS and TP. Description of the Drawings

[0017] Figure 1 is the schematic plan view of the system of the present invention; Figure 2 is the schematic view of the water passing arc wall front zone chemical mixing arc wall part of the present invention; Figure 3 is the schematic view of the water passing arc wall intercepting and purifying arc wall part of the present invention; Figure 4 is the schematic view of the structure of the water passing arc wall intercepting and purifying through-flow pipe fitting of the present invention; Figure 5 It is a schematic diagram of the mixing medicine arc wall part in the rear area after the water passing arc wall of the present invention; Figure 6 It is a schematic diagram of the water circular square membrane bed component of the present invention; Figure 7 It is a schematic diagram of the installation and positioning method of the water circular square membrane bed component and the aerobic main reaction unit of the present invention by adopting a column suspension wall-mounted method at the bottom; Figure 8 It is a schematic diagram of the installation and positioning method of the floating cylinder of the water circular square membrane bed component and the aerobic main reaction unit of the present invention; Figure 9 It is a schematic diagram of the layout of the square cylinder-shaped mesh permeable homogeneous structure of the water circular square membrane bed component of the present invention; Figure 10 It is a schematic diagram of the aeration and oxygen supply component of the present invention; Figure 11 It is a schematic diagram of the off-site packing film-forming method of the present invention; Figure 12 It is a schematic diagram of the micro efficacy verification component of the present invention; Figure 13 It is a principle block diagram of the operation method of the micro efficacy verification of the present invention; Figure 14 It is Figure 1 An enlarged structural schematic diagram of the area where the middle intercepting and filtering purification arc wall part and the rear area mixing medicine arc wall part are located. Specific embodiments

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] As Figure 1-11 shown, a hydrophilic circular square membrane bed biological purification system includes an aerobic main reaction unit 1. One end of the aerobic main reaction unit 1 is provided with a unit inlet flow-through pipe part 1a, and the other end is provided with a unit outlet flow-through pipe part 1b. A water passing arc wall component 2 is arranged in the aerobic main reaction unit 1. The water passing arc wall component 2 includes a front area mixing medicine arc wall part 21, an intercepting and filtering purification arc wall part 22, and a rear area mixing medicine arc wall part 23. A water circular square membrane bed component 3 is arranged between the front area mixing medicine arc wall part 21 and the intercepting and filtering purification arc wall part 22. The air inlet of the water circular square membrane bed component 3 is connected to an aeration and oxygen supply component 4. The medicine inlets of both the front area mixing medicine arc wall part 21 and the rear area mixing medicine arc wall part 23 are connected to a front and rear dosing component 6.

[0020] Preferably, both the front area mixing medicine arc wall part 21 and the rear area mixing medicine arc wall part 23 are integrally arc-shaped hollow cavity structures, with their tops and bottoms open and their sides closed. The sandwich space of the arc-shaped hollow cavity forms a fluid channel for the flowing-through fluid; the intercepting and filtering purification arc wall part 22 is integrally a hollow cage structure.

[0021] Preferably, the front-zone mixing medicine arc wall portion 21 includes a front-zone lower bottom C-shaped arc cross-section 211a, a front-zone upper top C-shaped arc cross-section 211b, and a front-zone side-rolled arc vertical wall portion 211c combined with each other. Both the front-zone lower bottom C-shaped arc cross-section 211a and the front-zone upper top C-shaped arc cross-section 211b are filter structures; the intercepting and filtering purification arc wall portion 22 includes an intercepting and filtering lower bottom C-shaped arc cross-section 221a, an intercepting and filtering upper top C-shaped arc cross-section 221b, and an intercepting and filtering side-rolled arc vertical wall portion 221c combined with each other. The intercepting and filtering lower bottom C-shaped arc cross-section 221a, the intercepting and filtering upper top C-shaped arc cross-section 221b, and the intercepting and filtering side-rolled arc vertical wall portion 221c are all filter structures; the rear-zone mixing medicine arc wall portion 23 includes a rear-zone lower bottom C-shaped arc cross-section 231a, a rear-zone upper top C-shaped arc cross-section 231b, and a rear-zone side-rolled arc vertical wall portion 231c combined with each other. Both the rear-zone lower bottom C-shaped arc cross-section 231a and the rear-zone upper top C-shaped arc cross-section 231b are filter structures, and a filter material 222 is filled in the intercepting and filtering purification arc wall portion 22.

[0022] In this embodiment, as shown Figures 1 to 5 in the figure. Among them: The inner cavity sandwich spaces of the front-zone lower bottom C-shaped arc cross-section 211a, the front-zone upper top C-shaped arc cross-section 211b, and the front-zone side-rolled arc vertical wall portion 211c guide the flow to form a fluid channel for the multiphase medium liquid to be mixed evenly and flow through vertically and horizontally. The medicine added from the pre-positioned medicine adding component 61 and the corresponding pollution components in the sewage are physically and chemically coupled to form reaction products (such as complexes, flocs, etc.) in this flow channel. The height dimension of the front-zone side-rolled arc vertical wall portion 211c is slightly higher than the water level height of the aerobic main reaction unit 1. (2) In the intercepting and filtering purification arc wall portion 22, a millimeter-level fine filtering fixed bed filter material 222 (the effective particle size distribution of the filter material 222 is 5 - 20 mm) with a certain stacking volume is filled in the inner cavity sandwich spaces of the intercepting and filtering lower bottom C-shaped arc cross-section 221a, the intercepting and filtering upper top C-shaped arc cross-section 221b, and the intercepting and filtering side-rolled arc vertical wall portion 221c. The height dimension of 221c is slightly higher than the water level height of the unit 1. (3) In the rear-zone mixing medicine arc wall portion 23, the inner cavity sandwich spaces of the rear-zone lower bottom C-shaped arc cross-section 231a, the rear-zone upper top C-shaped arc cross-section 231b, and the rear-zone side-rolled arc vertical wall portion 231c guide the flow to form a fluid channel for the multiphase medium liquid to be mixed evenly and flow through vertically and horizontally. The medicine added from the post-positioned medicine adding component 62 and the corresponding pollution components in the sewage are physically and chemically coupled to form reaction products (such as complexes, flocs, etc.) in this flow channel. The height dimension of the rear-zone side-rolled arc vertical wall portion 231c is slightly higher than the water level height of the aerobic main reaction unit 1.

[0023] Preferably, a water counter-current flushing component 22a is also provided on one side of the intercepting and filtering purification arc wall part 22 and is matched with the latter. The water counter-current flushing component 22a includes a water washing pump component 22a1. One side of the water washing pump component 22a1 is connected to a water suction pipe fitting 22a2, and the other end is connected to a water pressure outlet pipe fitting 22a3. The water suction port of the water suction pipe fitting 22a2 is located between the intercepting and filtering purification arc wall part 22 and the post-area medicine mixing arc wall part 23. The air inlet of the intercepting and filtering purification arc wall part 22 is connected to the air outlet of the aeration and oxygen supply component 4. The outlet of the water pressure outlet pipe fitting 22a3 is connected to the air outlet of the aeration and oxygen supply component 4. Check valves are provided at the outlet of the water pressure outlet pipe fitting 22a3 and the air outlet of the aeration and oxygen supply component 4. In this embodiment, after the water suction pipe fitting 22a2 sucks water from the filtered clear liquid area between the intercepting and filtering purification arc wall part 22 and the post-area medicine mixing arc wall part 23, it is connected to the water washing pump component 22a1. The water outlet of the water washing pump component 22a1 is communicated with the post-precision filter material scrubbing and maintenance pipe component 45 through the water pressure outlet pipe fitting 22a3 (a check valve 45b is also provided on the post-precision filter material scrubbing and maintenance pipe component 45), so as to realize the switching between the clear liquid flushing or air scrubbing of the filter material 222 of the intercepting and filtering purification arc wall part 22 (through the reasonable setting of the check valves of the post-precision filter material scrubbing and maintenance pipe component 45 and the water pressure outlet pipe fitting 22a3, the reverse flow and intermixing of the fluid conveyed by the post-precision filter material scrubbing and maintenance pipe component 45 and the water pressure outlet pipe fitting 22a3 are avoided).

[0024] Preferably, a through-flow pipe fitting 22b also penetrates through the surface of the intercepting and filtering purification arc wall part 22. The through-flow pipe fitting 22b includes a connecting pipe section part 22b2 penetrating through the surface of the intercepting and filtering purification arc wall part 22. One end of the connecting pipe section part 22b2 is an inflow port part 22b1, and the other end is an outflow port part 22b3. A one-way movable plug 22b0 is hinged at the inflow port part 22b1 and is connected to a pulling rope 22b0'. In this embodiment, a through-flow pipe fitting 22b (1-2 roots, such as 22b in Figure 1 is provided from the inflow area to the outflow area of the intercepting and filtering purification arc wall part 22. Structural schematic diagram Figure 4, 22b is a through-flow pipe component of the emergency bypass intercepting and filtering purification arc wall part 22. It includes an influent port part 22b1, a connecting pipe section part 22b2, and an effluent port part 22b3 (the port facing downward). The flow direction of the pipe section is from the influent port part 22b1 to the effluent port part 22b3. A one-way movable plug 22b0 is provided at the port of the influent port part 22b1 (the inner diameter of the one-way movable plug 22b0 matches that of the influent port part 22b1. The top end of the one-way movable plug 22b0 is fixed in position with the top of the pipe opening of the influent port part 22b1, and the lower end of the one-way movable plug 22b0 is in a free state. When the one-way movable plug 22b0 is engaged with the influent port part 22b1 by a bite connection, it can exactly wrap and seal the latter. The one-way movable plug 22b0 is also equipped with a pulling rope 22b0'). 1) When the pulling rope 22b0' maintains a freely lowered and unfolded state: At this time, the one-way movable plug 22b0 is in a falling and closing state due to its own gravity and is combined and wrapped with the influent port part 22b1. The influent pipe opening of the influent port part 22b1 is blocked by the closing action of the pipe opening of the one-way movable plug 22b0. At this time, the muddy water mixture in the post-reaction zone of the aerobic main reaction unit 1 cannot bypass the intercepting and filtering purification arc wall part 22, that is, it cannot directly enter the effluent area from the influent area of the intercepting and filtering purification arc wall part 22, ensuring that the intercepting and filtering purification arc wall part 22 plays the filtering and intercepting effect on the mixed liquid. This is the normal operation mode; 2) When the pulling rope 22b0' maintains a tightened and lifted state: At this time, the one-way movable plug 22b0 is in a pried-open and open state, that is, it is temporarily separated from the influent port part 22b1. At this time, the muddy water mixture in the post-reaction zone of the aerobic main reaction unit 1 can bypass the intercepting and filtering purification arc wall part 22 and directly and unobstructedly penetrate from the influent area of the intercepting and filtering purification arc wall part 22 into its effluent area. This is the abnormal operation mode, such as when the intercepting and filtering purification arc wall part 22 is in a state of air washing and clear liquid flushing maintenance.

[0025] Preferably, the water circular-square membrane bed component 3 includes a plurality of hydrophilic packing membrane bed cages 31 and empty cages 32 arranged alternately. A packing membrane 33 is provided in the hydrophilic packing membrane bed cage 31, and a packing 33a is provided in the packing membrane 33. In this embodiment, the water circular-square membrane bed component 3 is composed of a single set configured with hydrophilic packing membrane bed cages 31, empty cages 32, and packing membranes 33 arranged horizontally and vertically in a compact manner. There are multiple hydrophilic packing membrane bed cages 31 arranged horizontally and vertically, and there are also multiple empty cages 32 arranged horizontally and vertically. For example, in the horizontal arrangement, the hydrophilic packing membrane bed cage 31 is adjacent to the empty cage 32, the empty cage 32 is then adjacent to the next hydrophilic packing membrane bed cage 31, the hydrophilic packing membrane bed cage 31 is then adjacent to the next empty cage 32, and so on, alternating and interspersed in this way. The vertical arrangement forms an arranged and sleeved matrix in the same way. A multi-type packing 33a with a certain filling amount of hydrophilic light-weight suspended and easy-to-hang-film polyurethane, sponge, and loofah sponge (each single-component material is treated by gluing and stable modification to make it positively charged, which can achieve electrical neutralization with negatively charged sludge flocs, and has a good specific surface area, porosity of the plant wire mesh tissue, and physicochemical adhesion, and is more likely to trap the sludge zoogloea on its outer tissue cortex) is provided in 31 (the effective long and short side dimensions of the packing are 10 - 30 cm, and it is processed into a columnar shape with mesh holes or a square shape with voids). 32 is an empty cage and no packing 33a is provided temporarily (but a quick packing feeding port is reserved according to subsequent needs, and currently it is convenient to form a fluid cross-flow channel). The hydrophilic packing membrane bed cage 31 and the empty cage 32 are of the same cylindrical mesh-permeable structure. Their bottoms can be fixedly installed on the inner bottom wall of the aerobic main reaction unit 1, and a cage cover with a movable buckle is provided on the upper top cover (the cage cover is convenient to open or close). The pores of the hydrophilic packing membrane bed cage 31 and the empty cage 32 are smaller than the size of the shortest edge of the packing 33a to prevent the packing 33a from leaking out of the hydrophilic packing membrane bed cage 31.

[0026] In addition, the packing membrane 33 can adopt the mode of starting domestication and slow-cycle self-cultivation and film hanging in the aerobic main reaction unit 1 (this cycle is generally 20 - 30 days at normal temperature), or the method of off-site (borrowed-site) expanded cultivation and film hanging for the packing, such as Figure 11 shown. That is, the packing 33a is loaded into a permeable cage 33A1 with a certain volume specification (the loading capacity of the packing 33a can reach 0.1 - 1 m3) to form an off-site packing cage 33A, and then it is suspended and placed in the front reaction area of the biochemical aeration tank of a nearby large-scale urban sewage treatment plant with good nitrification removal function for borrowed-site bacteria matching and film hanging and bed formation (this cycle is generally 10 - 15 days at normal temperature, and the film hanging cycle is greatly shortened). After that, the packing membrane 33 is then migrated to the original position of the aerobic main reaction unit 1 and loaded into the hydrophilic packing membrane bed cage 31.

[0027] Preferably, the hydrophilic filler membrane bed cage 31 and the empty cage 32 are arranged in the aerobic main reaction unit 1 through a column hanging wall component 34; the column hanging wall component 34 includes a vertically arranged column 341, and the outer periphery of the column 341 is fixedly connected to the hydrophilic filler membrane bed cage 31 or the empty cage 32 through a transversely arranged short hanging rod 342, and the short hanging rod 342 cooperates with the hanging component. Figure 7 Another bottom of the unit 3 and 1 adopts a column hanging wall installation positioning method. The column hanging wall component is 34, wherein the column 341 is fixed to the bottom inner wall of the aerobic main reaction unit 1 at intervals, and the short hanging rods 342 are generally independent of each other, and four are in a group, and are directly bolted to the two sub-components of the hydrophilic filler membrane bed net cage 31 and the empty net cage 32, and then are dispersedly clamped at the upper part of the column 341 (with a clamping groove), so that the hydrophilic filler membrane bed net cage 31 and the empty net cage 32 can be directly lifted from the upper part of the column 341 by the electric hoist and other lifting parts to the water surface of the aerobic main reaction unit 1 through the short hanging rod 342, so as to carry out maintenance and flushing and dredging without precipitation. The size of the column 341 is slightly higher than the water level of the aerobic main reaction unit 1.

[0028] Preferably, the hydrophilic filler membrane bed cage 31 and the empty cage 32 are arranged in the aerobic main reaction unit 1 through a buoy connecting rod component 35; the buoy connecting rod component 35 includes an annular buoy component 351, and the annular buoy component 351 is connected to the hydrophilic filler membrane bed cage 31 or the empty cage 32 through a horizontal connecting rod component 352, and the annular buoy component 351 cooperates with the lifting piece. Figure 8 Another buoy installation and positioning method for unit 3 and unit 1, a filler 33a is arranged in the hydrophilic filler membrane bed cage 31, and the annular buoy component 351 of the buoy connecting rod component 35 is an annular buoy component, which is placed at a shallow water depth of the water level of the aerobic main reaction unit 1, and has sufficient buoyancy to float and suspend the weight of the hydrophilic filler membrane bed cage 31 after it is filled with filler 33a (after the filler 33a is filled and the membrane is attached to the bed). There are four symmetrical and balanced horizontal connecting rod components 352 in the annular direction, and the hydrophilic filler membrane bed cage 31 is movably bolted to the annular buoy component 351 through the horizontal connecting rod component 352. The annular buoy component 351 can also be pulled to the upper water-free position of the unit 1 by a steel wire rope (not shown in the figure).

[0029] Figure 9 It is another form of the water round square membrane bed component 3, that is, different from the cylindrical structure, the single set of hydrophilic filler membrane bed cage 31 is arranged in a square cylindrical mesh water-permeable structure.

[0030] Preferably, the aeration and oxygen supply component 4 includes an aeration induced draft fan 40, and the aeration induced draft fan 40 is respectively connected to a front reaction zone aeration pipe component 42, a rear reaction zone tapered aeration pipe component 43, a packing fluidization pipe component 44, and a post-precision filter media scrubbing and maintenance pipe component 45 through a main aeration pipe component 41; the front reaction zone aeration pipe component 42 includes a front reaction zone pipeline control valve 42a and front reaction zone distribution pipes 421 arranged along the flow direction; the rear reaction zone tapered aeration pipe component 43 includes a rear reaction zone pipeline control valve 43a and rear reaction zone distribution pipes 431 arranged along the flow direction; the packing fluidization pipe component 44 includes a packing fluidization pipeline control valve 44a and packing fluidization distribution pipes arranged along the flow direction, and the packing fluidization distribution pipes include a front reaction zone packing fluidization distribution pipe 441 and a rear reaction zone packing fluidization distribution pipe 442; the post-precision filter media scrubbing and maintenance pipe component 45 includes a post-precision filter media scrubbing and maintenance pipeline control valve 45a, a one-way valve 45b, a main pipe, and an arc-shaped distribution pipe 451 arranged at the center of the bottom of the cut-off and purification arc wall part 22. Among them: the front reaction zone aeration pipe component 42 includes a front reaction zone pipeline control valve 42a and front reaction zone distribution pipes 421 (provided with aeration microbubble overflow and diffusion components). Similarly, the rear reaction zone tapered aeration pipe component 43 includes a rear reaction zone pipeline control valve 43a and rear reaction zone distribution pipes 431 (provided with aeration microbubble overflow and diffusion components). The packing fluidization pipe component 44 includes a packing fluidization pipeline control valve 44a and packing fluidization distribution pipes arranged along the flow direction (provided with microbubble aeration diffusion devices), such as the front reaction zone packing fluidization distribution pipe 441 and the tapered aeration rear reaction zone packing fluidization distribution pipe 442. The packing fluidization pipe component 44 mainly serves for the purposes of stripping and fluidizing the hydrophilic suspended biofilm packing filled in the water circular square membrane bed component 3 and replacing the old and new biofilms. The post-precision filter media scrubbing and maintenance pipe component 45 includes a post-precision filter media scrubbing and maintenance pipeline control valve 45a, a one-way valve 45b, a main pipe, and an arc-shaped distribution pipe 451 arranged at the center of the bottom of the cut-off and purification arc wall part 22 (provided with aeration microbubble overflow and diffusion holes), and the arc-shaped structure of the arc-shaped distribution pipe 451 matches the cut-off and purification arc wall part 22, and is used for periodically starting the bottom-to-top flow flushing of the precision filter fixed bed packing or filter media layer filled in the cut-off and purification arc wall part 22 to dredge and improve the flow channel of the packing or filter media layer in the cut-off and purification arc wall part 22 and enhance and optimize or timely restore the porosity of the packing or filter media layer.

[0031] Preferably, the purification system of the present invention further includes a two-position reflux component 5, and the two-position reflux component 5 includes a centrifugal pump delivery component 50 and a pump inlet and outlet pipe fitting 51. The pump inlet and outlet pipe fitting 51 includes a first inlet pipe fitting 511 and a second inlet pipe fitting 512, and corresponding control valves are provided on both the first inlet pipe fitting 511 and the second inlet pipe fitting 512. The first inlet pipe fitting 511 is communicated with the near end of the reaction rear area of the aerobic main reaction unit 1, and the second inlet pipe fitting 512 is communicated with the area between the intercepting and filtering purification arc wall part 22 and the rear area chemical mixing arc wall part 23. The first inlet pipe fitting 511 collects the biochemical mixed liquid phase from the near end of the reaction rear area of the unit 1, and the second inlet pipe fitting 512 collects the clear liquid phase from the post-transition area after the fine filtration and deoxygenation of the mixed liquid phase at the near end of the reaction rear area of the aerobic main reaction unit 1 through the intercepting and filtering purification arc wall part 22. That is, by switching between the first inlet pipe fitting 511 and the second inlet pipe fitting 512, the centrifugal pump delivery component 50 can collect either the mixed liquid or the clear water liquid after deoxygenating and inhibiting the ORP oxidation state potential. If the first inlet pipe fitting 511 is collected for reflux, the activated sludge biomass of the aerobic main reaction unit 1 and its pre-aerobic biochemical unit can be supplemented; if the second inlet pipe fitting 512 is collected for reflux, the DO dissolved oxygen and ORP oxidation state potential entrained in the nitrification clear liquid can be reduced and weakened, avoiding adverse effects on the phosphorus release or denitrification reaction environmental material transfer conditions of the pre-aerobic or anoxic biochemical unit in front of the aerobic main reaction unit 1.

[0032] Preferably, the front and rear dosing components 6 include a front dosing component 61 and a rear dosing component 62. The front dosing component 61 and the rear dosing component 62 both include a dosing pump part and a corresponding delivery pipe. The front dosing component 61 is used for dosing the front area chemical mixing arc wall part 21, and the rear dosing component 62 is used for dosing the rear area chemical mixing arc wall part 23. Among them: the front dosing component 61 mainly doses flocculant liquids (either polyglutamic acid or polyacrylamide, which need to be matured and configured into a certain dilute concentration aqueous solution before dosing), and can also assist in adding highly efficient degradation bacteria, vitamins and trace growth elements for refractory organic or inorganic pollutants; the rear dosing component 62 mainly doses coagulant liquids (with the functions of chemical phosphorus removal and turbidity removal), including dilute concentration aqueous solutions of iron salt electrolytes, or aluminum salt electrolytes, or iron-aluminum silicate complexes.

[0033] In addition, the above hydrophilic round and square membrane bed biological purification system of the present invention further includes a micro efficacy verification component 7, as shown in Figure 12Shown, including a verification reaction vessel 71, an aggregate dosing component 72, a micro-aeration component 73, and a verification detection component 74. 71 at least includes 71a, 71b, 71c, and 71d, and the effective volumes are all 2 to 10 L. Sampling and venting pipe fittings a1, a2, a3, and a4 are respectively provided. Among them, 71a is a reaction vessel for muddy water material, 71b is a reaction vessel only containing packing, 71c is a reaction vessel for aggregating muddy water material and packing, and 71d is a reaction vessel for multi-material mixing (aggregating muddy water material, packing, the flocculating liquid of 61 or the coagulating liquid of 62 and mixing them inside). 72 includes muddy water material 72a, packing 72b, and the flocculating liquid of 61 or the coagulating liquid of 62 72c. Among them, 72a is taken from the biochemical muddy water mixture in the front reaction zone after 21 in unit 1 (the sludge concentration is controlled at 2500 to 7000 mg / L), 72b is taken from the packing of component 33 in unit 1 (the effective packing rate of the packing is in the range of 15% to 40% relative to the effective volume of 71b), and 72c is taken from the flocculating liquid of 61 (the dry basis dosing concentration is 0.5 to 1.5 mg / L) or the coagulating liquid of 62 (the effective dosing concentration of iron or aluminum metal ions is 5 to 15 mg / L). 73 includes a micro-aeration oxygen pump 730, a main pipe component 731, and each branch pipe component 732 (including 732a, 732b, 732c, 732d, which are respectively connected to the containers of 71a to 71d, and each is provided with a gas volume regulating valve), and the dissolved oxygen level at the reaction time point of 71a to 71d is detected and adjusted through a portable dissolved oxygen component 733. 74 includes a COD detection or / and ammonia nitrogen detection component 740 (detecting the mass concentration of supernatant COD or / and ammonia nitrogen at the reaction time point, in mg / L unit), a sludge sedimentation ratio measuring component 741 with a full scale of 100 mL to 1 L (measuring and reading the sludge sedimentation volume ratio at the reaction time point, in % unit), a clear water sensory transparency measuring component 742 with a full scale of 50 cm (measuring and reading the transparency of the supernatant at the reaction time point, in cm unit), and a microscopic observation measuring component 743. 743 includes 743a (including an optical electron microscope or a phase contrast microscope 743a, equipped with an objective slide 743a1 with a scale line of 0.01 to 1 mm and a transparent micrometer, used for measuring the microbial floc size of activated sludge or the endophytic film organisms on hydrophilic suspended packing), 743b (including an electronic eyepiece 743b and its supporting USB connection line 743b1, 743b can be placed in the original eyepiece barrel of 743a for replacement), and a portable notebook 743c (installed with the driving software of the electronic eyepiece, which can be used to project the biological microscopy image of 743a onto the software of 743c for display, directly observe the biological phase image activity, measure the floc size with a micrometer, and save the corresponding microscopy records).

[0034] Microscopic potency verification operation method: See Figure 13As shown, after adding the corresponding matching aggregates 72 to 71a to 71d, start 73 for aeration (and detect and regulate the dissolved oxygen supply and demand through 733), control the aeration reaction to reach the required duration (usually 6 to 12 hours), then immediately sample or let it stand and precipitate for 30 to 60 minutes, collect the target muddy water mixture (the muddy water mixture samples required by 741 and 743) or the supernatant sample (the clear liquid samples required by 740 and 742) through a1 to a4, and perform detection, measurement, observation, recording analysis and analogy through 74 to integrate and simulate qualitative and semi-quantitative means to evaluate the significant synergistic effect of the hydrophilic filler membrane bed compared with the single activated sludge system, so as to provide pre-research and pre-judgment considerations for the practicability and necessity of adding fillers to the hydrophilic filler membrane bed cage 31 in the aerobic main reaction unit 1, how to select fillers and the economically effective filler dosage (or the dosage ratio relative to the tank volume of the aerobic main reaction unit 1).

[0035] Through the micro-effectiveness verification component 7, realize the process dual-line twin scheduling test, and provide pre-research and pre-judgment considerations for process adjustment. Thus, ensure that ammonia nitrogen is stably below 5 mg / L or below, SS is stably below 10 mg / L, turbidity is below 10 NTU, TP is below 0.5 mg / L, COD is below 50 mg / L, which is better than the first-class A effluent quality, and can efficiently, quickly and energy-savingly cope with the biodegradation and antagonistic effects of organic or inorganic pollutants (or new pollutants), bactericidal and biostatic substances carried in the influent water with normal-chain functional groups.

[0036] In addition, the present invention also discloses a purification method of the above-mentioned hydrophilic round-square membrane bed biological purification system, which includes the following steps: S1. The sewage enters the front-area mixing chemical wall part 21 through the unit inlet overflow pipe part 1a. After the pre-added chemical component 61 inputs the chemical agent and mixes it with the sewage inside the front-area mixing chemical wall part 21, it enters the aerobic main reaction unit 1 from the bottom of the pool; S2. In the aerobic main reaction unit 1, in the filler body composed of a plurality of alternately arranged hydrophilic filler membrane bed cages 31 and empty cages 32 arranged alternately, the sewage evenly enters the filler body through the staggered flow channels; S3. The sewage passing through the aerobic main reaction unit 1 is filtered by the intercepting and purifying arc wall part 22 and then enters the water outlet area. Then, a part of the sewage is used as the circulating liquid and returned to the anoxic area through the two-position reflux component 5; S4. Another part of the sewage enters the arc-shaped interlayer from the bottom of the rear-area mixing chemical wall part 23, then mixes with the chemical agent input by the post-added chemical component 62 in the interlayer, and finally discharges from the top and is discharged through the unit outlet overflow pipe part 1b.

[0037] Through the above hydrophilic round and square membrane bed biological purification system and method, the following technical benefits can be achieved: flexible implementation of in-situ feeding and replacement filling in a cage-like manner based on changes in process parameter requirements, and different on-site installation modes such as the fixation method, column suspension wall type, and mobile floating drum type are adopted in combination with the application scenario. Through the performance validation module, the twin scheduling test of the process on two lines is realized, providing consideration for pre-research and pre-judgment for process adjustment. Thus, it is ensured that ammonia nitrogen is stably below 5 mg / L or less, SS is stably below 10 mg / L, turbidity is below 10 NTU, TP is below 0.5 mg / L, and COD is below 50 mg / L, which is better than the first-class A water quality, and it can efficiently and quickly respond to organic or inorganic pollutants (or new pollutants) with normal chain functional groups, bactericidal properties, and biostatic properties carried in the influent water, as well as the biodegradation and antagonistic effects. The sludge sedimentation ratio SV 30 decreases to the range of 15% - 40%. The effective attached biomass of the degrading zoogloea increases by 20% - 40% compared with the traditional activated sludge process. The discharge of excess sludge is reduced by more than 20%. The nitrification removal load and total emission reduction under the transient peak conditions of water volume and quality are increased by more than 30%. Based on the in-situ biochemical potential tapping, the potential for capacity expansion, standard improvement, and synergistic efficiency increase may reach more than 40%. The effluent water quality meets the discharge standard better than the first-class A, effectively responding to the pollutant removal compliance buffer guarantee rate under the conditions of continuous over-water load of 30% - 60% for several days during the flood season, or sudden continuous water quality impact load of 20% - 50% for several days, or low water temperature load (10 - 15 °C) for several months in winter. Moreover, it effectively avoids the risk of sludge easily flowing away with water from the end of the self-biochemical precipitation separation unit and causing the rebound and exceeding the standard of particulate pollutants such as SS and TP.

[0038] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A hydrophilic circular and square membrane bed biological purification system, comprising an aerobic main reaction unit (1), characterized in that: One end of the aerobic main reaction unit (1) is provided with a unit inlet current-carrying pipe part (1a), and the other end is provided with a unit outlet current-carrying pipe part (1b). A water-passing arc wall component (2) is arranged inside the aerobic main reaction unit (1). The water-passing arc wall component (2) includes a front-zone medicine-mixing arc wall part (21), a filtering and purifying arc wall part (22), and a rear-zone medicine-mixing arc wall part (23). A water circular-square membrane bed component (3) is arranged between the front-zone medicine-mixing arc wall part (21) and the filtering and purifying arc wall part (22). The air inlet of the water circular-square membrane bed component (3) is connected to an aeration and oxygen supply component (4). The medicine inlets of the front-zone medicine-mixing arc wall part (21) and the rear-zone medicine-mixing arc wall part (23) are both connected to a front and rear dosing component (6).

2. The hydrophilic round square membrane bed biological purification system according to claim 1, wherein: Both the front-zone medicine-mixing arc wall part (21) and the rear-zone medicine-mixing arc wall part (23) are of an arc-shaped hollow cavity structure as a whole. Their tops and bottoms are open and the sides are closed. The sandwich space of the arc-shaped hollow cavity forms a current-carrying fluid channel; the filtering and purifying arc wall part (22) is of a hollow cage structure as a whole.

3. The hydrophilic circular square membrane bed biological purification system according to claim 2, characterized in that: The front-zone medicine-mixing arc wall part (21) includes a front-zone lower bottom C-shaped arc section (211a), a front-zone upper top C-shaped arc section (211b), and a front-zone side-rolled arc vertical wall part (211c) that are combined with each other. Both the front-zone lower bottom C-shaped arc section (211a) and the front-zone upper top C-shaped arc section (211b) are of a filter screen structure; the filtering and purifying arc wall part (22) includes a filtering and purifying lower bottom C-shaped arc section (221a), a filtering and purifying upper top C-shaped arc section (221b), and a filtering and purifying side-rolled arc vertical wall part (221c) that are combined with each other. The filtering and purifying lower bottom C-shaped arc section (221a), the filtering and purifying upper top C-shaped arc section (221b), and the filtering and purifying side-rolled arc vertical wall part (221c) are all of a filter screen structure; the rear-zone medicine-mixing arc wall part (23) includes a rear-zone lower bottom C-shaped arc section (231a), a rear-zone upper top C-shaped arc section (231b), and a rear-zone side-rolled arc vertical wall part (231c) that are combined with each other. Both the rear-zone lower bottom C-shaped arc section (231a) and the rear-zone upper top C-shaped arc section (231b) are of a filter screen structure. A filter material (222) is filled inside the filtering and purifying arc wall part (22).

4. A hydrophilic circular square membrane bed biological purification system according to claim 2, characterized in that: A water countercurrent flushing component (22a) is also arranged on one side of the filtering and purifying arc wall part (22). The water countercurrent flushing component (22a) includes a water washing pump component (22a1). One side of the water washing pump component (22a1) is connected to a water suction pipe fitting (22a2), and the other end is connected to a water pressure pipe fitting (22a3). The water suction port of the water suction pipe fitting (22a2) is located between the filtering and purifying arc wall part (22) and the rear-zone medicine-mixing arc wall part (23). The air inlet of the filtering and purifying arc wall part (22) is connected to the air outlet of the aeration and oxygen supply component (4). The outlet of the water pressure pipe fitting (22a3) is connected to the air outlet of the aeration and oxygen supply component (4). One-way valves are provided at the outlet of the water pressure pipe fitting (22a3) and the air outlet of the aeration and oxygen supply component (4).

5. A hydrophilic round and square membrane bed biological purification system according to claim 2, characterized in that: The surface of the filtering and purifying arc wall part (22) is also provided with a through-flow pipe fitting (22b). The through-flow pipe fitting (22b) includes a connecting pipe section part (22b2) arranged on the surface of the filtering and purifying arc wall part (22). One end of the connecting pipe section part (22b2) is an inflow port part (22b1), and the other end is an outflow port part (22b3). A one-way movable blocking plate (22b0) matched with the inflow port part (22b1) is hinged at the inflow port part (22b1), and the one-way movable blocking plate (22b0) is connected with a pulling rope (22b0').

6. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The water circular square membrane bed component (3) includes a plurality of hydrophilic filler membrane bed cages (31) and empty cages (32) arranged alternately. A filler membrane (33) is arranged in the hydrophilic filler membrane bed cage (31), and a filler (33a) is arranged in the filler membrane (33).

7. A hydrophilic circular square membrane bed biological purification system according to claim 6, characterized in that: The hydrophilic filler membrane bed cages (31) and the empty cages (32) are arranged in the aerobic main reaction unit (1) through a column hanging wall component (34). The column hanging wall component (34) includes a vertically arranged column (341). The periphery of the column (341) is fixedly connected with the hydrophilic filler membrane bed cage (31) or the empty cage (32) respectively through a horizontally arranged short hanging rod member (342), and the short hanging rod member (342) is matched with a hoisting member.

8. The hydrophilic circular square membrane bed biological purification system according to claim 6, wherein: The hydrophilic filler membrane bed cages (31) and the empty cages (32) are arranged in the aerobic main reaction unit (1) through a floating barrel connecting rod component (35). The floating barrel connecting rod component (35) includes a circular floating barrel component (351). The circular floating barrel component (351) is connected with the hydrophilic filler membrane bed cage (31) or the empty cage (32) through a horizontal connecting rod component (352), and the circular floating barrel component (351) is matched with a hoisting member.

9. The hydrophilic circular square membrane bed biological purification system according to claim 1, characterized in that: The aeration and oxygen supply component (4) includes an aeration induced draft fan (40). The aeration induced draft fan (40) is connected with a front reaction zone aeration pipe component (42), a rear reaction zone gradually reducing aeration pipe component (43), a filler fluidization pipe component (44), and a post-precision filter material scrubbing and maintenance pipe component (45) respectively through a main aeration pipe component (41). The front reaction zone aeration pipe component (42) includes a front reaction zone pipeline control valve (42a) and each front reaction zone distribution pipe (421) arranged along the flow direction. The rear reaction zone gradually reducing aeration pipe component (43) includes a rear reaction zone pipeline control valve (43a) and each rear reaction zone distribution pipe (431) arranged along the flow direction. The filler fluidization pipe component (44) includes a filler fluidization pipeline control valve (44a) and each filler fluidization distribution pipe along the flow direction. The filler fluidization distribution pipe includes a front reaction zone filler fluidization distribution pipe (441) and a rear reaction zone filler fluidization distribution pipe (442). The post-precision filter material scrubbing and maintenance pipe component (45) includes a post-precision filter material scrubbing and maintenance pipeline control valve (45a), a one-way valve (45b), a main pipe, and an arc-shaped distribution pipe (451) arranged at the central part of the bottom of the filtering and purifying arc wall part (22).

10. A hydrophilic circular square membrane bed biological purification system according to claim 1, characterized in that: It further includes a two-position reflux component (5), the two-position reflux component (5) includes a centrifugal pumping component (50) and a pump inlet and outlet pipe fitting (51), the pump inlet and outlet pipe fitting (51) includes a first inlet pipe fitting (511) and a second inlet pipe fitting (512), corresponding control valves are provided on both the first inlet pipe fitting (511) and the second inlet pipe fitting (512), the first inlet pipe fitting (511) is communicated with the near end of the reaction rear area of the aerobic main reaction unit (1), and the second inlet pipe fitting (512) is communicated with the area between the intercepting and filtering purification arc wall part (22) and the rear area chemical mixing arc wall part (23).

11. A hydrophilic round and square membrane bed biological purification system according to claim 1, characterized in that: The front and rear dosing components (6) include a front dosing component (61) and a rear dosing component (62), the front dosing component (61) and the rear dosing component (62) both include a dosing pump component and a corresponding conveying pipe, the front dosing component (61) is used for dosing the front area chemical mixing arc wall part (21), and the rear dosing component (62) is used for dosing the rear area chemical mixing arc wall part (23).

12. A purification method for the hydrophilic round and square membrane bed biological purification system according to any one of claims 1 to 8, characterized in that: It comprises the following steps: S1. Sewage enters the front area chemical mixing arc wall part (21) through the unit inlet overflow pipe part (1a). After the front dosing component (61) inputs the medicament and mixes it with the sewage inside the front area chemical mixing arc wall part (21), it enters the aerobic main reaction unit (1) from the bottom of the pool; S2. In the aerobic main reaction unit (1), the sewage passes through the staggered flow channels in the packing body composed of a plurality of alternately arranged hydrophilic packing membrane bed cages (31) and empty cages (32) arranged alternately, so that the sewage evenly enters the packing body; S3. The sewage passing through the aerobic main reaction unit (1) is filtered by the intercepting and filtering purification arc wall part (22) and then enters the water outlet area. Then, a part of the sewage is used as the circulating liquid and refluxed to the anoxic area through the two-position reflux component (5); S4. Another part of the sewage enters the arc-shaped interlayer from the bottom of the rear area chemical mixing arc wall part (23), then mixes with the medicament input by the rear dosing component (62) inside the interlayer, and finally is discharged through the unit outlet overflow pipe part (1b) after discharging from the top.

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