A hydrophilic round square membrane bed biological purification system and method

Abstract

The application discloses a hydrophilic round square membrane bed biological purification system and method, which comprises an aerobic main body reaction unit, one end of the aerobic main body reaction unit is provided with a unit inlet overflow pipe part, and the other end is provided with a unit outlet overflow pipe part, a water passing arc wall part is arranged in the aerobic main body reaction unit, the water passing arc wall part comprises a front area mixed medicine arc wall part, a interception and filtration purification arc wall part and a rear area mixed medicine arc wall part, a water round square membrane bed part is arranged between the front area mixed medicine arc wall part and the interception and filtration purification arc wall part, an air inlet of the water round square membrane bed part is connected with an aeration oxygen supply part, and air inlets of the front area mixed medicine arc wall part and the rear area mixed medicine arc wall part are connected with front and rear arranged medicine adding parts; the application can efficiently and quickly and with energy saving and low consumption deal with organic or inorganic pollutants with normal chain functional groups which are carried in water.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment and purification technology, and in particular to a hydrophilic circular-square membrane bed biological purification system and method. Background Technology

[0002] Existing conventional activated sludge (AS) processes struggle to adapt to complex changes in influent and the surrounding environment. The proportion of biological organic matter in the sludge of the biological treatment unit is often below 0.6%, the number of active bacteria in the sludge flocs is low, and heterotrophic or autotrophic floc-degrading bacteria are unlikely to gain absolute dominance, making it difficult to form a symbiotic food chain environment for the degradation of mixed bacteria. Based on the in-situ conditions of the biological treatment and sedimentation separation system, the pollutant removal load under complex operating conditions is low, and indicators such as ammonia nitrogen, TP, and COD are difficult to maintain stably below Class A. Existing facilities and methods will severely hinder the biodegradation capacity of conventionally functionalized organic or inorganic pollutants (or emerging pollutants) carried in the influent, as well as their bactericidal and bioinhibitory properties. Sludge settling ratios exceeding 60% and poor settling performance make secondary sedimentation tanks highly susceptible to sludge loss and flocculent floating. To maintain high pollution removal efficiency (e.g., ammonia nitrogen concentration in influent exceeds 50 mg / L), emergency agents or expensive specific agents must be added, or the concentration of biological sludge must be increased by more than double (under abnormal operating conditions, the concentration of biological sludge retention reaches 8000 mg / L or more) in the hope of doubling the single-stage sludge production. This results in high energy consumption for biological aeration, increased consumption of denitrification and phosphorus removal agents, increased greenhouse gas carbon emissions (carbon emission intensity), and a high yield of residual biological inorganic sludge. The sludge has an excessively long sludge age in the biological system, causing the sludge to tend to age prematurely. The treatment system is unable to further improve and tap the potential of nitrification removal load and total emission reduction under the condition of sudden peak changes in water volume and quality. Based on the fact that the potential for synergistic effect of biochemical isotope is difficult to fully expand capacity and improve standards, it is difficult to reliably guarantee the buffer of pollutant removal to meet standards under emergency adverse conditions such as continuous high water volume load for several days during the flood season, sudden continuous water quality shock load for several days, or continuous low water temperature load (10~15℃) for several months in winter. Moreover, it cannot avoid the risk of sludge loss with water at the end of the biochemical sedimentation and separation unit, which may cause the rebound of particulate pollutants such as SS and TP to exceed the standard. Summary of the Invention

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

[0004] To solve the above-mentioned 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. The aerobic main reaction unit has a unit inlet flow pipe at one end and a unit outlet flow pipe at the other end. The aerobic main reaction unit is provided with a water-passing arc wall component, which includes a front-zone mixing arc wall, a filtration and purification arc wall, and a rear-zone mixing arc wall. A water-circular-square membrane bed component is provided between the front-zone mixing arc wall and the filtration and purification arc wall. The air inlet of the water-circular-square membrane bed component is connected to an aeration and oxygen supply component. The inlets of the front-zone mixing arc wall and the rear-zone mixing arc wall are both connected to front and rear dosing components.

[0005] Preferably, the front mixing arc wall and the rear mixing arc wall are both arc-shaped hollow cavity structures with open tops and bottoms and closed sides, and the interlayer space of the arc-shaped hollow cavity forms a flow channel; the intercepting and filtration arc wall is a hollow cage structure.

[0006] Preferably, the front mixing arc wall section includes a front lower bottom C-shaped arc section, a front upper top C-shaped arc section, and a front side rolled arc vertical wall section that are combined together, wherein the front lower bottom C-shaped arc section and the front upper top C-shaped arc section are both filter screen structures; the intercepting and purifying arc wall section includes an intercepting lower bottom C-shaped arc section, an intercepting upper top C-shaped arc section, and an intercepting side rolled arc vertical wall section that are combined together, wherein the intercepting lower bottom C-shaped arc section, the intercepting upper top C-shaped arc section, and the intercepting side rolled arc vertical wall section are all filter screen structures; the rear mixing arc wall section includes a rear lower bottom C-shaped arc section, a rear upper top C-shaped arc section, and a rear side rolled arc vertical wall section that are combined together, wherein the rear lower bottom C-shaped arc section and the rear upper top C-shaped arc section are both filter screen structures, and the intercepting and purifying arc wall section is filled with filter media.

[0007] Preferably, one side of the filter-cutting and purification arc wall is further provided with a water counterflow flushing component that cooperates with it. The water counterflow flushing component includes a water washing pump component. One side of the water washing pump component is connected to the water inlet pipe, and the other end is connected to the water pressure pipe. The water inlet of the water inlet pipe is located between the filter-cutting and purification arc wall and the rear mixing arc wall. The air inlet of the filter-cutting and purification arc wall is connected to the air outlet of the aeration and oxygen supply component. The outlet of the water pressure pipe is connected to the air outlet of the aeration and oxygen supply component. Both the outlet of the water pressure pipe and the air outlet of the aeration and oxygen supply component are provided with one-way valves.

[0008] Preferably, the surface of the filter-cutting and purification arc wall is further provided with a through-flow pipe, the through-flow pipe including a connecting pipe section passing through the surface of the filter-cutting and purification arc wall, one end of the connecting pipe section being an inlet and the other end being an outlet; a one-way movable blocking plate is hinged to the inlet and cooperates with it, the one-way movable blocking plate being connected to the pulling rope.

[0009] Preferably, the water-round membrane bed component includes multiple alternating hydrophilic filler membrane bed cages and empty cages, wherein the hydrophilic filler membrane bed cages are provided with filler membranes, and the filler membranes are provided with filler.

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

[0011] Preferably, the hydrophilic filler membrane bed cage and the empty cage are located within the aerobic main reaction unit via a float connecting rod assembly; the float connecting rod assembly includes a circular float assembly, which is connected to the hydrophilic filler membrane bed cage or the empty cage via a horizontal connecting rod assembly, and the circular float assembly cooperates with the lifting components.

[0012] Preferably, the aeration and oxygen supply component includes an aeration blower, which is connected to the pre-reaction zone aeration pipe component, the post-reaction zone gradual aeration pipe component, the packing fluidization pipe component, and the post-fine filter media scrubbing and maintenance pipe component via a main aeration pipe component; the pre-reaction zone aeration pipe component includes a pre-reaction zone pipeline control valve and pre-reaction zone distribution pipes arranged along the flow direction; the post-reaction zone gradual aeration pipe component includes a post-reaction zone pipeline control valve and post-reaction zone distribution pipes arranged along the flow direction; the packing fluidization pipe component includes a packing fluidization pipeline control valve and packing fluidization distribution pipes arranged along the flow direction, the packing fluidization distribution pipes include pre-reaction zone packing fluidization distribution pipes and post-reaction zone packing fluidization distribution pipes; the post-fine filter media scrubbing and maintenance pipe component includes a post-fine filter media 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 purification arc wall.

[0013] Preferably, it further includes a dual-position reflux component, which includes a water pumping component and pump inlet / outlet pipes. The pump inlet / outlet pipes include a first inlet pipe and a second inlet pipe, each equipped with a corresponding control valve. The first inlet pipe is connected to the near end of the reaction zone of the aerobic main reaction unit, and the second inlet pipe is connected to the area between the intercepting and purification arc wall and the post-zone mixing arc wall.

[0014] Preferably, the pre- and post-dosing components include a pre-dosing component and a post-dosing component. Both the pre-dosing component and the post-dosing component include a dosing pump and a corresponding delivery pipe. The pre-dosing component is used to administer the drug to the front mixing arc wall section, and the post-dosing component is used to administer the drug to the rear mixing arc wall section.

[0015] In addition, the present invention also discloses a purification method for the above-mentioned hydrophilic circular-square membrane bed biological purification system, which includes the following steps:

[0016] S1. Wastewater enters the front mixing arc wall section from the unit inlet overflow pipe. After the pre-dosing device adds the agent and mixes it with the wastewater inside the front mixing arc wall section, it enters the aerobic main reaction unit from the bottom of the tank.

[0017] S2. In the aerobic main reaction unit, the wastewater is uniformly introduced into the packing body, which consists of multiple alternating hydrophilic packing membrane bed cages and empty cages arranged in an alternating manner, through staggered flow channels.

[0018] S3. After passing through the aerobic main reaction unit, the wastewater enters the effluent zone after being filtered by the intercepting and purification arc wall. Then, a portion of the wastewater is returned to the anoxic zone as circulating liquid through the dual-position reflux component.

[0019] S4. Another part of the wastewater enters the arc-shaped interlayer from the bottom of the rear mixing arc wall section, and then mixes with the reagent added by the post-dosing component in the interlayer. Finally, it is discharged from the top through the unit outlet overflow pipe.

[0020] The beneficial effects of this invention are as follows: Based on the changes in process parameter requirements, this invention flexibly realizes in-situ feeding and replacement of net cages, and adopts different on-site installation modes such as fixed position method, column hanging wall type, and mobile float type according to the application scenario. It can efficiently, quickly and energy-savingly deal with organic or inorganic pollutants (or new pollutants) with constant chain functional groups carried in the water, and improve the bactericidal, bio-inhibitory biodegradation and antagonistic efficacy. Its sludge settling ratio SV30 is reduced to 15%~40%, the biomass of effectively attached degrading bacteria flocs is increased by 20%~40% compared with the traditional activated sludge process, the amount of excess sludge is reduced by more than 20%, and the nitrification removal load and total emission reduction under the condition of sudden peak water volume and water quality changes are increased by more than 30%. Based on the in-situ tapping of biochemical potential, the potential for full capacity expansion, standard upgrading and synergistic efficiency improvement may reach more than 40%, and the effluent discharge standard is better than Class A. It effectively copes with the pollutant removal compliance buffer guarantee rate under the conditions of continuous water volume load of 30%~60% for several days during the flood season, or sudden continuous water quality shock load of 20%~50% for several days, or continuous low water temperature load (10~15℃) for several months in winter. It also effectively avoids the risk of sludge easily running away from the end of the biochemical sedimentation and separation unit and being lost with the water, causing the rebound of particulate pollutants such as SS and TP to exceed the standard. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the system of the present invention;

[0022] Figure 2 This is a schematic diagram of the mixing arc wall section in the front area of ​​the water-passing arc wall of the present invention;

[0023] Figure 3 This is a schematic diagram of the water-passing arc wall interception and purification arc wall section of the present invention;

[0024] Figure 4 This is a schematic diagram of the through-flow pipe fitting for water arc wall interception filtration and purification according to the present invention;

[0025] Figure 5 This is a schematic diagram of the mixing arc wall section in the rear area of ​​the water-passing arc wall of the present invention;

[0026] Figure 6 This is a schematic diagram of the water-round-square membrane bed component of the present invention;

[0027] Figure 7 This is a schematic diagram of the bottom of the water-round square membrane bed component and the aerobic main reaction unit of the present invention, which adopts a column-suspended wall-mounted installation and positioning method.

[0028] Figure 8 This is a schematic diagram of the float installation and positioning method of the water-round square membrane bed component and the aerobic main reaction unit of the present invention;

[0029] Figure 9 This is a schematic diagram of the same-shaped structure with square-shaped mesh for water permeability in the water-round square membrane bed component of the present invention;

[0030] Figure 10 This is a schematic diagram of the aeration and oxygen supply component of the present invention;

[0031] Figure 11 This is a schematic diagram of the ex-situ packing film attachment method of the present invention;

[0032] Figure 12 This is a schematic diagram of the miniature effectiveness verification component of the present invention;

[0033] Figure 13 This is a schematic diagram of the principle of the micro-efficacy verification operation method of the present invention;

[0034] Figure 14 yes Figure 1 Enlarged structural diagram of the area containing the intermediate interception filtration and purification arc wall section and the rear mixing chemical arc wall section. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] like Figure 1-11As shown, a hydrophilic circular-square membrane bed biological purification system includes an aerobic main reaction unit 1. The aerobic main reaction unit 1 has a unit inlet flow pipe 1a at one end and a unit outlet flow pipe 1b at the other end. The aerobic main reaction unit 1 is provided with a water-passing arc wall component 2. The water-passing arc wall component 2 includes a front-zone mixing arc wall 21, a filtration and purification arc wall 22, and a rear-zone mixing arc wall 23. A water-circular-square membrane bed component 3 is provided between the front-zone mixing arc wall 21 and the filtration and purification arc wall 22. The air inlet of the water-circular-square membrane bed component 3 is connected to an aeration and oxygen supply component 4. The inlets of the front-zone mixing arc wall 21 and the rear-zone mixing arc wall 23 are both connected to front and rear dosing components 6.

[0037] Preferably, the front mixing arc wall section 21 and the rear mixing arc wall section 23 are both arc-shaped hollow cavity structures with open tops and bottoms and closed sides, and the interlayer space of the arc-shaped hollow cavity forms a flow channel; the intercepting and filtration arc wall section 22 is a hollow cage structure.

[0038] Preferably, the front-zone mixing arc wall section 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-curved vertical wall section 211c, all combined together. The front-zone lower bottom C-shaped arc section 211a and the front-zone upper top C-shaped arc section 211b are both filter screen structures. The filtration and purification arc wall section 22 includes a filtration lower bottom C-shaped arc section 221a, a filtration upper top C-shaped arc section 221b, and a filtration side-curved vertical wall section 221c, all combined together. The bottom C-shaped arc section 221a, the top C-shaped arc section 221b, and the side rolled arc vertical wall section 221c of the filter interception are all filter screen structures; the rear mixing arc wall section 23 includes the bottom C-shaped arc section 231a, the top C-shaped arc section 231b, and the side rolled arc vertical wall section 231c of the rear area combined together. The bottom C-shaped arc section 231a and the top C-shaped arc section 231b of the rear area are both filter screen structures. The filter interception and purification arc wall section 22 is filled with filter material 222.

[0039] In this embodiment, see Figures 1-5As shown. Among them: the C-shaped arc section 211a at the bottom of the front zone, the C-shaped arc section 211b at the top of the front zone, and the side arc-shaped vertical wall 211c of the front zone form a multiphase medium liquid mixed in the upper and lower flow channels. The dosing of the pre-dosing component 61 and the corresponding pollutant components in the sewage are physically and chemically coupled in this flow channel to form reaction products (such as complexes, flocs, etc.). The height of the side arc-shaped vertical wall 211c of the front zone is slightly higher than the water level of the aerobic main reaction unit 1. (2) In the intercepting and filtration arc wall 22, the C-shaped arc section 221a at the bottom of the intercepting filter, the C-shaped arc section 221b at the top of the intercepting filter, and the side arc-shaped vertical wall 221c of the intercepting filter are filled with millimeter-level fine filter fixed bed filter media 222 (the effective particle size distribution of filter media 222 is 5~20mm) with a certain stockpile volume. The height of 221c is slightly higher than the water level of unit 1. (3) In the rear zone mixing arc wall section 23, the inner cavity interlayer space of the three rear zone bottom C-shaped arc section 231a, the rear zone top C-shaped arc section 231b, and the rear zone side rolled arc vertical wall section 231c forms a multiphase medium liquid mixed in the upper and lower flow channels. The dosing from the rear dosing component 62 and the corresponding pollutant components in the sewage are coupled in this flow channel to form reaction products (such as complexes, flocs, etc.). The height of the rear zone side rolled arc vertical wall section 231c is slightly higher than the water level of the aerobic main reaction unit 1.

[0040] Preferably, one side of the filter-cutting and purification arc wall section 22 is further provided with a water counterflow flushing component 22a that cooperates with it. The water counterflow flushing component 22a includes a water washing pump component 22a1. One side of the water washing pump component 22a1 is connected to the water inlet pipe fitting 22a2, and the other end is connected to the water pressure pipe fitting 22a3. The water inlet of the water inlet pipe fitting 22a2 is located between the filter-cutting and purification arc wall section 22 and the rear mixing arc wall section 23. The air inlet of the filter-cutting and purification arc wall section 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. Both the outlet of the water pressure pipe fitting 22a3 and the air outlet of the aeration and oxygen supply component 4 are provided with one-way valves. In this embodiment, after the water intake pipe 22a2 absorbs water from the post-filter clear liquid zone between the self-filtering and purification arc wall section 22 and the post-mixing arc wall section 23, it is connected to the water washing pump component 22a1. The outlet of the water washing pump component 22a1 is connected to the post-fine filter media scrubbing and maintenance pipe component 45 through the pressure port pipe 22a3 (a one-way valve 45b is also provided on the post-fine filter media scrubbing and maintenance pipe component 45), so as to realize the switching between clear liquid flushing or air scrubbing of the filter media 222 of the self-filtering and purification arc wall section 22 (through the reasonable setting of the one-way valves of the post-fine filter media scrubbing and maintenance pipe component 45 and the pressure port pipe 22a3, the backflow and cross-contamination of the fluid transported by the post-fine filter media scrubbing and maintenance pipe component 45 and the pressure port pipe 22a3 are avoided).

[0041] Preferably, the surface of the filter-cutting and purification arc wall 22 is further provided with a through-flow pipe 22b. The through-flow pipe 22b includes a connecting pipe section 22b2 passing through the surface of the filter-cutting and purification arc wall 22. One end of the connecting pipe section 22b2 is an inlet 22b1, and the other end is an outlet 22b3. A one-way movable blocking plate 22b0 is hinged to the inlet 22b1 and cooperates with it. The one-way movable blocking plate 22b0 is connected to the pulling rope 22b0'. In this embodiment, through-flow pipes 22b (1-2 in number, e.g., ...) are provided from the inlet area to the outlet area of ​​the filter-cutting and purification arc wall 22. Figure 1 (22b) Structural schematic Figure 4 22b is the through-flow pipe component of the emergency bypass filtration and purification arc wall section 22, which includes an inlet section 22b1, a connecting pipe section 22b2, and an outlet section 22b3 (with the inlet facing down). The pipe section flows from the inlet section 22b1 to the outlet section 22b3. A one-way movable blocking plate 22b0 is provided at the inlet section 22b1 (the inner diameter of the one-way movable blocking plate 22b0 matches that of the inlet section 22b1, the top of the one-way movable blocking plate 22b0 is fixedly engaged with the top of the inlet section 22b1, and the lower end of the one-way movable blocking plate 22b0 is in a free state. When the one-way movable blocking plate 22b0 is engaged with the inlet section 22b1, it can cover and seal the latter. The one-way movable blocking plate 22b0 is also equipped with a pulling rope 22b0'. 1) When the pulling rope 22b0' is in a freely lowered and extended state: At this time, the one-way movable blocking plate 22b0 is in a falling and closed state due to its own gravity, and is combined with and covers the inlet 22b1. The inlet of the inlet 22b1 is blocked by the sealing effect of the one-way movable blocking plate 22b0. At this time, the mud-water mixture in the rear reaction zone of the aerobic main reaction unit 1 cannot pass through the intercepting and purification arc wall 22, that is, it cannot directly enter the outlet zone from the inlet zone of the intercepting and purification arc wall 22, thus ensuring that the intercepting and purification arc wall 22 plays its role in filtering the mixture. 1) Filter interception effect, this is the normal operating mode; 2) When the pulling rope 22b0' is kept taut and lifted: at this time, the one-way movable blocking plate 22b0 is in the pry-open state, that is, temporarily separated from the inlet 22b1. At this time, the mud-water mixture in the rear reaction zone of the aerobic main reaction unit 1 can pass through the interception and purification arc wall 22 and directly enter its outlet zone unobstructed from the inlet zone of the interception and purification arc wall 22. This is the non-normal operating mode, such as when the interception and purification arc wall 22 is subjected to air washing and clear liquid flushing maintenance.

[0042] Preferably, the water-round-square membrane bed component 3 includes multiple alternating arrangements of hydrophilic filler membrane bed cages 31 and empty cages 32. Each hydrophilic filler membrane bed cage 31 contains a filler membrane 33, and each filler membrane 33 contains filler 33a. In this embodiment, the water-round-square membrane bed component 3 consists of a single set of hydrophilic filler membrane bed cages 31, empty cages 32, and filler membranes 33 arranged compactly in both horizontal and vertical directions. Multiple hydrophilic filler membrane bed cages 31 and multiple empty cages 32 are also arranged in both horizontal and vertical directions. For example, in the horizontal arrangement, a hydrophilic filler membrane bed cage 31 is adjacent to an empty cage 32, and an empty cage 32 is adjacent to the next hydrophilic filler membrane bed cage 31, and so on, alternating and interleaving. The vertical arrangement similarly forms a nested matrix of arrangements. 31 contains a certain amount of hydrophilic, lightweight, suspended, biofilm-easily attached polyurethane, sponge, and loofah sponge (each component is treated with adhesive stabilization and modification to give it a positive charge, which can neutralize the negative charge of sludge flocs, and has a good specific surface area, porosity of plant filament tissue, and physicochemical adhesion, making it easier to capture sludge bacteria flocs on its outer tissue cortex) mixed ratio of multiple types of filler 33a (the effective length and short side dimensions of the filler are 10~30cm, and it is a fixedly shaped columnar mesh or vacant square block). 32 is an empty cage and does not contain filler 33a for the time being (but a quick filler replenishment port is reserved according to future needs, and the current state facilitates the formation of fluid cross-flow channels). The hydrophilic filler membrane bed cage 31 and the empty cage 32 are cylindrical mesh structures with water permeability. Their bottoms can be fixed to the inner bottom wall of the aerobic main reaction unit 1. The top cover is equipped with a cage cover with movable buckle for easy opening or closing. The pore size of the hydrophilic filler membrane bed cage 31 and the empty cage 32 is smaller than the size of the shortest edge of the filler 33a, preventing the filler 33a from leaking out of the hydrophilic filler membrane bed cage 31.

[0043] In addition, the packing membrane 33 can be introduced into an acclimatization and slow-cycle self-cultivation membrane formation mode within the aerobic main reaction unit 1 (this cycle is generally 20-30 days at room temperature), or it can be introduced into a detached (borrowed) expansion packing membrane formation method, such as... Figure 11 As shown. The packing material 33a is loaded into a permeable mesh cage 33A1 of a certain volume (the capacity of the packing material 33a can reach 0.1~1 m3) to form an off-site packing cage 33A. Then, it is suspended and placed in the pre-reaction zone of the biological aeration tank of a nearby large-scale urban sewage treatment plant with good nitrification removal function to carry out the biofilm formation and implantation of bacteria (this cycle is generally 10~15 days at room temperature, and the biofilm formation cycle is greatly shortened). Then, the packing membrane 33 is moved to the aerobic main reaction unit 1 and filled into the hydrophilic packing membrane bed mesh cage 31.

[0044] Preferably, the hydrophilic filler membrane bed cage 31 and the empty cage 32 are installed in the aerobic main reaction unit 1 via a column suspension wall component 34; the column suspension wall component 34 includes a vertically arranged column 341, and the periphery of the column 341 is fixedly connected to the hydrophilic filler membrane bed cage 31 or the empty cage 32 via a horizontally arranged short suspension rod 342, and the short suspension rod 342 cooperates with the hoisting component. Figure 7 Another bottom mounting method for Unit 3 and Unit 1 is a column-suspended wall-mounted installation. The column-suspended wall component is 34, where columns 341 are fixed to the bottom inner wall of the aerobic main reaction unit 1 at intervals. Short suspension rods 342 are generally independent, with four rods forming a group. They are directly bolted to two sub-components of the hydrophilic filler membrane bed cage 31 and the empty cage 32, respectively. These are then positioned near the upper part of the column 341 (with slots) to facilitate the direct lifting of the hydrophilic filler membrane bed cage 31 and the empty cage 32 from the upper part of the column 341 using electric hoists or other lifting devices, allowing for maintenance and flushing without dewatering. The column 341 is slightly higher than the water level of the aerobic main reaction unit 1.

[0045] Preferably, the hydrophilic filler membrane bed cage 31 and the empty cage 32 are disposed in the aerobic main reaction unit 1 through the float connecting rod component 35; the float connecting rod component 35 includes a circular float component 351, which is connected to the hydrophilic filler membrane bed cage 31 or the empty cage 32 through the horizontal connecting rod component 352, and the circular float component 351 cooperates with the lifting component. Figure 8 For another method of buoy installation and positioning between Unit 3 and Unit 1, the hydrophilic filler membrane bed cage 31 is filled with filler 33a. The annular float component 351 of the float connecting rod component 35 is an annular float component, placed at a shallow water depth in the aerobic main reaction unit 1. It has sufficient buoyancy to support 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). There are four symmetrical and balanced horizontal connecting rod components 352 in a circumferential direction. The hydrophilic filler membrane bed cage 31 is movably bolted to the annular float component 351 through the horizontal connecting rod components 352. The annular float component 351 can also be pulled to the upper part of Unit 1 above the water by steel wire rope (not shown in the figure).

[0046] Figure 9 Another form of water-round square membrane bed component 3 is different from the cylindrical structure. The single set of hydrophilic filler membrane bed cage 31 is arranged with a square cylindrical mesh permeable structure.

[0047] Preferably, the aeration and oxygen supply component 4 includes an aeration blower 40, which is connected to the pre-reaction zone aeration pipe component 42, the post-reaction zone gradual aeration pipe component 43, the packing fluidization pipe component 44, and the post-fine filter media scrubbing and maintenance pipe component 45 via a main aeration pipe component 41; the pre-reaction zone aeration pipe component 42 includes a pre-reaction zone pipeline control valve 42a and various pre-reaction zone distribution pipes 421 arranged along the flow direction; the post-reaction zone gradual aeration pipe component 43 includes a post-reaction zone pipeline control valve 43a and various... The system includes a post-reaction zone distribution pipe 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 along the flow direction, the packing fluidization distribution pipes including a pre-reaction zone packing fluidization distribution pipe 441 and a post-reaction zone packing fluidization distribution pipe 442; the post-fine filter media scrubbing and maintenance pipe component 45 includes a post-fine 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 bottom center of the intercepting and purification arc wall part 22. Specifically, the pre-reaction zone aeration pipe component 42 includes a pre-reaction zone pipeline control valve 42a and pre-reaction zone distribution pipes 421 arranged along the flow direction (with aeration microbubble overflow and diffusion components). Similarly, the post-reaction zone gradual aeration pipe component 43 includes a post-reaction zone pipeline control valve 43a and post-reaction zone distribution pipes 431 arranged along the flow direction (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 (equipped with microbubble aeration and diffusion devices) along the flow direction, such as the packing fluidization distribution pipe 441 in the pre-reaction zone and the packing fluidization distribution pipe 442 in the post-reaction zone with gradually decreasing aeration. The packing fluidization pipe component 44 mainly serves to perform detachment fluidization flushing and replacement of old and new membrane biological materials in the hydrophilic suspended biofilm packing material filled in the water-round membrane bed component 3. The post-fine filter media scrubbing and maintenance pipe component 45 includes a post-fine filter media scrubbing and maintenance pipeline control valve 45a, a one-way valve 45b, a main pipe, and an arc-shaped distribution pipe 451 (with aeration microbubble overflow diffusion holes) arranged at the bottom center of the filter interception and purification arc wall section 22. The arc-shaped structure of the arc-shaped distribution pipe 451 matches the filter interception and purification arc wall section 22 and is used to periodically and automatically start bottom flow flushing of the fine filter fixed bed packing or filter media layer filled in the filter interception and purification arc wall section 22, so as to unclog and improve the flow channels of the packing or filter media layer in the filter interception and purification arc wall section 22 and improve or restore the porosity of the packing or filter media layer in a timely manner.

[0048] Preferably, the purification system of the present invention further includes a dual-position reflux component 5, which includes a water pumping component 50 and pump inlet / outlet pipes 51. The pump inlet / outlet pipes 51 include a first inlet pipe 511 and a second inlet pipe 512. Each of the first inlet pipes 511 and the second inlet pipe 512 is equipped with a corresponding control valve. The first inlet pipe 511 is connected to the near end of the post-reaction zone of the aerobic main reaction unit 1, and the second inlet pipe 512 is connected to the area between the intercepting and filtration purification arc wall section 22 and the post-mixing chemical arc wall section 23. The first inlet pipe 511 collects the biochemical mixed liquid phase from the near end of the post-reaction zone of unit 1, and the second inlet pipe 512 collects the clear liquid phase from the post-transition zone after fine filtration and deoxygenation of the mixed liquid phase from the near end of the post-reaction zone of the aerobic main reaction unit 1 via the intercepting and filtration purification arc wall section 22. By switching between the first inlet pipe 511 and the second inlet pipe 512, the water pumping unit 50 can collect either the mixed liquor or the clear water after deoxygenation and suppression of ORP oxidation potential. If the first inlet pipe 511 is collected for reflux, the activated sludge biomass of the aerobic main reaction unit 1 and its pre-biochemical unit can be replenished. If the second inlet pipe 512 is collected for reflux, the dissolved oxygen DO and ORP oxidation potential carried in the nitrification clear liquid can be reduced and weakened, thus avoiding adverse effects on the phosphorus release of the pre-anaerobic or anoxic biochemical unit of the aerobic main reaction unit 1 or on the material transfer conditions of the denitrification reaction environment.

[0049] Preferably, the pre- and post-dosing components 6 include a pre-dosing component 61 and a post-dosing component 62. Both the pre-dosing component 61 and the post-dosing component 62 include a dosing pump and a corresponding delivery pipe. The pre-dosing component 61 is used to dosing the pre-mixing arc wall section 21, and the post-dosing component 62 is used to dosing the post-mixing arc wall section 23. Specifically, the pre-dosing component 61 mainly adds flocculants (either polyglutamic acid or polyacrylamide, which needs to be matured and prepared into a dilute aqueous solution before dosing), and may also supplement with highly efficient degrading bacteria, vitamins, and trace growth elements targeting recalcitrant organic or inorganic pollutants. The post-dosing component 62 mainly adds coagulants (with chemical phosphorus removal and turbidity removal functions), including dilute aqueous solutions of iron salt electrolytes, aluminum salt electrolytes, or iron-aluminum silicate complexes.

[0050] In addition, the hydrophilic circular-square membrane bed biological purification system of the present invention also includes a micro-efficacy verification component 7, see Figure 12The system includes a verification reaction vessel 71, an aggregate feeding component 72, a micro-aeration component 73, and a verification testing component 74. 71 includes at least components 71a, 71b, 71c, and 71d, each with an effective volume of 2-10L. Each component is equipped with a corresponding sampling venting pipe a1, a2, a3, and a4. 71a is the reaction vessel for the slurry, 71b is the reaction vessel containing only the packing material, 71c is the reaction vessel combining the slurry and the packing material, and 71d is the reaction vessel for mixing multiple materials (combining the slurry, packing material, and the flocculant from 61 or the coagulate from 62). 72 includes slurry 72a, packing material 72b, and the flocculant from 61 or the coagulate from 62 72c. 72a is taken from the biochemical sludge-water mixture in the pre-reaction zone after 21 in Unit 1 (sludge concentration controlled at 2500~7000mg / L), 72b is taken from the packing material of component 33 in Unit 1 (the effective filling rate of the packing material is in the range of 15%~40% of the effective volume of 71b), and 72c is taken from the flocculant of 61 (dry basis dosage concentration of 0.5~1.5mg / L) or the coagulation of 62 (effective dosage concentration of iron or aluminum metal ions of 5~15mg / L). 73 includes a small micro-aeration oxygen pump 730, a main pipe component 731, and various branch pipe components 732 (including 732a, 732b, 732c, and 732d, which are connected to containers 71a~71d one by one, each equipped with an air volume regulating valve), and the dissolved oxygen level at the reaction time points of 71a~71d is detected and adjusted by a portable dissolved oxygen component 733. 74 includes a COD and / or ammonia nitrogen detection component 740 (detecting the mass concentration of COD and / or ammonia nitrogen in the supernatant at the reaction time, in mg / L units), a sludge settling ratio measuring component 741 with a full-scale of 100 mL to 1 L (measuring and reading the sludge settling volume ratio at the reaction time, in % units), 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, in cm units), and a microscopic observation measuring component 743. 743 includes 743a (including an optical electron microscope or phase contrast microscope 743a, equipped with 0.01~1 μm... The objective slide 743a1, with m-scale markings and a transparent micrometer, is used to measure the size of microbial flocs in activated sludge or hydrophilic suspended packing membrane samples. The slide 743b includes an electronic eyepiece 743b and its matching USB cable 743b1; the 743b can be placed inside the existing eyepiece tube of the 743a for replacement. The portable notebook 743c contains the driver software for the electronic eyepiece, which can be used to project the biological microscopic images from the 743a onto the 743c screen, directly observe biological phase image activity, measure floc size with the micrometer, and save corresponding microscopic records.

[0051] Miniature efficacy verification procedure: see Figure 13As shown, after adding the corresponding aggregate 72 to 71a~71d, 73 is turned on for aeration (and dissolved oxygen supply and demand are controlled by 733). The aeration reaction is controlled to reach the required duration (generally 6~12h). Then, samples are immediately taken or allowed to settle for 30~60min. Target sludge-water mixture (sludge-water mixture samples required by 741, 743) or supernatant samples (clarified samples required by 740, 742) are collected through a1~a4. Detection or measurement observation, recording, analysis and comparison are performed through 74. Using integrated simulation qualitative and semi-quantitative methods, the synergistic effect of the hydrophilic packing membrane bed compared to a single activated sludge system is evaluated. This provides preliminary research and judgment considerations for the practicality and necessity of adding packing material to the hydrophilic packing membrane bed cage 31 in the aerobic main reaction unit 1, how to select the packing material type and the economical and effective packing material addition amount (or the addition ratio relative to the tank volume of the aerobic main reaction unit 1).

[0052] Through the micro-efficiency verification component 7, a dual-line twin scheduling test of the process is achieved, providing preliminary research and judgment considerations for process adjustment. This ensures that ammonia nitrogen is consistently below 5 mg / L, SS is consistently 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 Class A tailwater quality. It can efficiently, quickly, and with low energy consumption, cope with the biodegradation and antagonism of organic or inorganic pollutants (or new pollutants) with normal chain functional groups carried in the incoming water, as well as bactericidal and bioinhibitory effects.

[0053] In addition, the present invention also discloses a purification method for the above-mentioned hydrophilic circular-square membrane bed biological purification system, which includes the following steps:

[0054] S1. Wastewater enters the front mixing arc wall section 21 through the unit inlet overflow pipe section 1a. The pre-dosing component 61 adds the agent and mixes it with the wastewater inside the front mixing arc wall section 21. Then, it enters the aerobic main reaction unit 1 from the bottom of the tank.

[0055] S2. In the aerobic main reaction unit 1, the wastewater is uniformly introduced into the packing body composed of multiple alternating hydrophilic packing membrane bed net cages 31 and empty net cages 32 through staggered flow channels.

[0056] S3. After the wastewater from the aerobic main reaction unit 1 is filtered through the intercepting and purification arc wall section 22, it enters the effluent area. Then, a portion of the wastewater is returned to the anoxic area as circulating liquid through the dual-position reflux component 5.

[0057] S4. Another part of the wastewater enters the arc-shaped interlayer from the bottom of the rear mixing arc wall section 23, and then mixes with the agent added by the post-dosing component 62 in the interlayer. Finally, it is discharged from the top through the unit outlet overflow pipe section 1b.

[0058] The above-mentioned hydrophilic circular membrane bed biological purification system and method can achieve the following technical benefits: flexible in-situ feeding and replacement of feedstock based on changes in process parameters; and different on-site installation modes such as fixed-position method, column-suspended wall type, and mobile float type can be adopted according to application scenarios. Through the performance effectiveness verification module, dual-line twin scheduling tests of the process can be achieved, providing preliminary research and judgment considerations for process adjustments. This ensures that ammonia nitrogen is consistently below 5 mg / L, SS is consistently below 10 mg / L, turbidity is below 10 NTU, TP is below 0.5 mg / L, and COD is below 50 mg / L, exceeding Class A water quality standards. It can efficiently, quickly, and energy-savingly address the biodegradation and antagonistic effects of organic or inorganic pollutants (or new pollutants) with normal-chain functional groups carried in the incoming water, as well as bactericidal and bioinhibitory properties. Sludge settling ratio (SV) is also improved. 30 The biomass of effectively attached degrading bacteria flocs is reduced to 15%~40% compared to the traditional activated sludge process, and the amount of residual sludge is reduced by more than 20%. The nitrification removal load and total discharge reduction under the condition of sudden peak water volume and quality changes are increased by more than 30%. Based on the in-situ potential of biochemical treatment, the potential for full capacity expansion and standard improvement synergistic efficiency enhancement may reach more than 40%. The effluent discharge standard is better than Class A. It effectively copes with the pollutant removal compliance buffer guarantee rate under the conditions of continuous water volume load of 30%~60% for several days during the flood season, or sudden continuous water quality shock load of 20%~50% for several days, or continuous low water temperature load (10~15℃) for several months in winter. It also effectively avoids the risk of sludge easily running away from the end of the biochemical sedimentation and separation unit and being lost with the water, causing the rebound of particulate pollutants such as SS and TP to exceed the standard.

[0059] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A hydrophilic circular-square membrane bed biological purification system, comprising an aerobic main reaction unit (1), characterized in that: The aerobic main reaction unit (1) is provided with a unit inlet flow pipe (1a) at one end and a unit outlet flow pipe (1b) at the other end. The aerobic main reaction unit (1) is provided with a water-passing arc wall component (2). The water-passing arc wall component (2) includes a front-zone mixing arc wall component (21), a filtration and purification arc wall component (22), and a rear-zone mixing arc wall component (23). A hydrophilic circular-square membrane bed component (3) is provided between the front-zone mixing arc wall component (21) and the filtration and purification arc wall component (22). The air inlet of the hydrophilic circular-square membrane bed component (3) is connected to the aeration and oxygen supply component (4). The inlets of the wall section (21) and the rear mixing arc wall section (23) are connected to the front and rear dosing components (6); the front mixing arc wall section (21) and the rear mixing arc wall section (23) are both arc-shaped hollow cavity structures, with open tops and bottoms and closed sides, and the interlayer space of the arc-shaped hollow cavity forms a flow channel; the intercepting and filtration arc wall section (22) is a hollow cage structure; the front mixing arc wall section (21) includes the front lower bottom C-shaped arc section (211a), the front upper top C-shaped arc section (211b), and the front side rolled arc vertical wall section (211b) combined together. 11c), the bottom C-shaped arc section (211a) and the top C-shaped arc section (211b) of the front zone are both filter structures; the intercepting and purifying arc wall (22) includes the bottom C-shaped arc section (221a), the top C-shaped arc section (221b), and the side curved vertical wall (221c) of the intercepting filter, which are combined together. The bottom C-shaped arc section (221a), the top C-shaped arc section (221b), and the side curved vertical wall (221c) of the intercepting filter are all filter structures; the rear mixing arc wall (23) includes the rear zone The bottom C-shaped arc section (231a), the top C-shaped arc section (231b) of the rear area, and the side rolled arc wall section (231c) of the rear area are all filter screen structures. The bottom C-shaped arc section (231a) and the top C-shaped arc section (231b) of the rear area are filled with filter media (222). The hydrophilic round and square membrane bed component (3) includes multiple alternating hydrophilic filler membrane bed cages (31) and empty cages (32). The hydrophilic filler membrane bed cages (31) are filled with filler membranes (33), and the filler membranes (33) are filled with filler (33a).

2. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The filter-cutting and purification arc wall (22) is also provided with a water countercurrent flushing component (22a) that works in conjunction with it. 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 the water inlet pipe (22a2), and the other end is connected to the water pressure pipe (22a3). The water inlet of the water inlet pipe (22a2) is located between the filter-cutting and purification arc wall (22) and the rear mixing arc wall (23). The air inlet of the filter-cutting and purification arc wall (22) is connected to the air outlet of the aeration and oxygen supply component (4). The outlet of the water pressure pipe (22a3) is connected to the air outlet of the aeration and oxygen supply component (4). Both the outlet of the water pressure pipe (22a3) and the air outlet of the aeration and oxygen supply component (4) are provided with one-way valves.

3. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The surface of the filter-cutting and purification arc wall (22) is also provided with a through-flow pipe (22b). The through-flow pipe (22b) includes a connecting pipe section (22b2) that passes through the surface of the filter-cutting and purification arc wall (22). One end of the connecting pipe section (22b2) is an inlet (22b1), and the other end is an outlet (22b3). A one-way movable blocking plate (22b0) is hinged to the inlet (22b1) and is connected to the pulling rope (22b0').

4. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The hydrophilic filler membrane bed cage (31) and the empty cage (32) are installed in the aerobic main reaction unit (1) through the column suspension wall component (34); the column suspension wall component (34) includes a vertically arranged column (341), and the periphery of the column (341) is fixedly connected to the hydrophilic filler membrane bed cage (31) or the empty cage (32) through a horizontally arranged short suspension rod (342), and the short suspension rod (342) cooperates with the hoisting component.

5. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The hydrophilic filler membrane bed cage (31) and the empty cage (32) are located in the aerobic main reaction unit (1) through the float connecting rod component (35); the float connecting rod component (35) includes a circular float component (351), the circular float component (351) is connected to the hydrophilic filler membrane bed cage (31) or the empty cage (32) through the horizontal connecting rod component (352), and the circular float component (351) cooperates with the hoisting component.

6. 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 blower (40), which is connected to the pre-reaction zone aeration pipe component (42), the post-reaction zone gradual aeration pipe component (43), the packing fluidization pipe component (44), and the post-fine filter media scrubbing and maintenance pipe component (45) via the main aeration pipe component (41). The pre-reaction zone aeration pipe component (42) includes a pre-reaction zone pipeline control valve (42a) and pre-reaction zone distribution pipes (421) arranged along the flow direction. The post-reaction zone gradual aeration pipe component (43) includes a post-reaction zone pipeline control valve (43a) and... Each post-reaction zone distribution pipe (431) is arranged along the flow direction; the packing fluidization pipe component (44) includes a packing fluidization pipeline control valve (44a) and each packing fluidization distribution pipe along the flow direction, the packing fluidization distribution pipe includes a pre-reaction zone packing fluidization distribution pipe (441) and a post-reaction zone packing fluidization distribution pipe (442); the post-fine filter media scrubbing and maintenance pipe component (45) includes a post-fine 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 bottom center of the cut-off filter purification arc wall (22).

7. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: It also includes a dual-position reflux component (5), which includes a water pumping component (50) and a pump inlet / outlet pipe (51). The pump inlet / outlet pipe (51) includes a first inlet pipe (511) and a second inlet pipe (512). Both the first inlet pipe (511) and the second inlet pipe (512) are equipped with corresponding control valves. The first inlet pipe (511) is connected to the near end of the reaction zone of the aerobic main reaction unit (1), and the second inlet pipe (512) is connected to the area between the intercepting and purification arc wall (22) and the post-zone mixing arc wall (23).

8. The hydrophilic circular-square membrane bed biological purification system according to claim 1, characterized in that: The pre- and post-dosing components (6) include a pre-dosing component (61) and a post-dosing component (62). Both the pre-dosing component (61) and the post-dosing component (62) include a dosing pump and a corresponding delivery pipe. The pre-dosing component (61) is used to dosing the drug into the front mixing arc wall section (21), and the post-dosing component (62) is used to dosing the drug into the rear mixing arc wall section (23).

9. A purification method for the hydrophilic circular-square membrane bed biological purification system according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1. Wastewater enters the pre-mixing arc wall section (21) through the unit inlet overflow pipe section (1a). The pre-dosing component (61) adds the agent and mixes it with the wastewater inside the pre-mixing arc wall section (21). Then, it enters the aerobic main reaction unit (1) from the bottom of the tank. S2. In the aerobic main reaction unit (1), the wastewater is uniformly introduced into the packing body composed of multiple alternating hydrophilic packing membrane bed net cages (31) and empty net cages (32) through the staggered flow channels. S3. After the wastewater from the aerobic main reaction unit (1) is filtered through the intercepting and purification arc wall (22), it enters the effluent zone. Then, a portion of the wastewater is returned to the anoxic zone as circulating liquid through the dual-position return component (5). S4. Another part of the wastewater enters the arc-shaped interlayer from the bottom of the rear mixing arc wall section (23), and then mixes with the agent added by the post-dosing component (62) in the interlayer. Finally, it is discharged from the top through the unit outlet overflow pipe section (1b).

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