Biological coupling treatment device and method for high-salt organic wastewater

Abstract

The invention discloses a biological coupling treatment device and method for high-salt organic wastewater, and relates to the technical field of wastewater treatment.The biological coupling treatment device comprises a pretreatment unit, a biological treatment unit, a physical and chemical treatment unit, a desalination unit and a post-treatment unit, the bio-membrane reactor comprises a biological reaction tank and an MBR membrane assembly, activated sludge is arranged in the biological reaction tank, an aeration assembly and a limiting assembly are arranged at the bottom of the MBR membrane assembly, a flow pushing assembly is arranged on the bottom side in the biological reaction tank, and the MBR membrane assembly comprises a frame. According to the invention, the aeration structure is optimized, the permeability of the MBR membrane is guaranteed, the cleaning frequency is reduced, the service life of the membrane is prolonged, in addition, the aeration structure is optimized, so that bubbles are uniformly distributed, and the oxygen content of each region is kept uniform.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, and in particular to a biological coupling treatment device and method for high-salt organic wastewater. Background Art

[0002] High-salinity organic wastewater refers to wastewater containing high concentrations of inorganic salts (usually total salt concentration greater than 1%) and organic pollutants. These organic pollutants include but are not limited to sugars, proteins, oils, phenols, hydrocarbons, etc. High-salinity environments can inhibit microorganisms, and salt can affect the physical and chemical properties of wastewater, making the treatment process more complicated. Among them, biological coupling treatment is an effective means to treat high-salinity organic wastewater.

[0003] Chinese patent application number 2019114241097 discloses a method and device for treating high-salt organic wastewater, which is achieved through the following functional areas: process intensification area, multi-stage vaporization area, buffer adjustment area, crystallization separation area, and biological treatment area. The high-salt organic wastewater passes through the process intensification area, and the process is intensified under the action of filler and field effect, and the vaporization temperature of the solvent is reduced by changing the physical and chemical properties of the solution; then it enters the multi-stage vaporization area at the bottom of the main reactor to accelerate the vaporization rate of the solvent; the buffer adjustment area adjusts the liquid level of the concentrated liquid in the bottom of the main reactor, and part of the concentrated liquid is circulated back to the multi-stage vaporization area; the remaining concentrated liquid in the buffer adjustment area enters the crystallization separation area to crystallize the impurities in the concentrated liquid; the vaporized steam is condensed, and the condensate enters the biological treatment area to remove organic matter, but the treatment effect is still poor when treating high-salt organic wastewater.

[0004] In addition, in the prior art, MBR membrane bioreactors are used to treat high-salt organic wastewater, and the existing membrane components are susceptible to dual pollution by inorganic salt scaling and organic matter deposition in a high-salt environment, and the membrane surface is easily blocked, resulting in a decrease in flux, and frequent cleaning is required, shortening the membrane life. In addition, in a high-salt environment, traditional aeration devices have problems such as low gas-liquid mixing efficiency and high energy consumption. For example, high-salt wastewater treatment requires a higher aeration intensity to maintain sludge activity, but the bubbles in existing aerators are unevenly distributed, resulting in insufficient dissolved oxygen in local areas or deterioration of sludge settling properties. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a biological coupling treatment device and method for high-salt organic wastewater, which effectively reduces inorganic salt scaling and organic matter deposition on the surface of the MBR membrane, ensures the permeability of the MBR membrane, reduces the cleaning frequency, and extends the service life of the membrane. In addition, by optimizing the aeration structure, the bubble distribution is uniform, and the oxygen content in each area is kept uniform, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical scheme: a biological coupling treatment device for high-salt organic wastewater, comprising a pretreatment unit, a biological treatment unit, a physical and chemical treatment unit, a desalination unit and a post-treatment unit, wherein the biological treatment unit comprises a salt-tolerant bacteria bioreactor and a biofilm reactor, wherein the biofilm reactor comprises a bioreactor and an MBR membrane assembly, wherein the bioreactor is equipped with activated sludge, an aeration assembly and a limit assembly are arranged at the bottom of the MBR membrane assembly, and a plug flow assembly is arranged at the inner bottom side of the bioreactor; The MBR membrane assembly comprises a frame, wherein a bottom frame and a top frame are respectively provided on the bottom and top sides of the frame, two groups of manifolds are symmetrically provided on both sides of the top frame, two groups of elastic seats are symmetrically provided on both sides of the bottom frame, and a membrane assembly is provided between the elastic seats and the manifolds; The aeration assembly includes an air collecting pipe, two groups of aeration pipes are symmetrically arranged on both sides of the air collecting pipe, and a gear is fixedly sleeved in the middle of each aeration pipe; The limiting assembly comprises a support plate, an electric telescopic rod is arranged in the middle of the top surface of the support plate, a movable plate is arranged at the top telescopic end of the electric telescopic rod, and two groups of isolation seats are symmetrically arranged on both sides of the top of the movable plate.

[0007] Preferably, the elastic seat and the manifold correspond one to one, the membrane group is connected to the manifold, the top of the manifold is fixedly connected to a drainage pipe, the end of the drainage pipe is fixedly connected to a collecting pipe, the collecting pipe is fixedly connected to the top of the frame, a collecting pipe is provided in the middle of the collecting pipe, the collecting pipe is connected to the input port of an external water diversion pump through a flange pipe, and a liquid flow sensor is provided on the flange pipe.

[0008] Preferably, aeration holes are evenly arranged on the aeration pipe, one end of the aeration pipe away from the air collecting pipe is arranged on a pipe rack fixed to the bottom of the frame, an air inlet pipe is arranged at the end of the air collecting pipe, and the air inlet pipe is connected to an external air supply system.

[0009] Preferably, the isolation seat is an isosceles trapezoidal structure, each isolation seat is located between two adjacent elastic seats, the support plate is arranged in the middle of the bottom side of the frame, and the two ends of the support plate are slidably connected with slide rails, and the slide rails on both sides are fixedly connected to the inner sides of the frame respectively.

[0010] Preferably, the flow pushing assembly includes a guide rod, a slide seat is slidably sleeved on the guide rod, a rotating motor is provided on the top of the slide seat, an electric push rod is provided on the output shaft of the rotating motor, and a push plate is provided at the top telescopic end of the electric push rod.

[0011] Preferably, a U-shaped seat is provided at the bottom of the support plate, the U-shaped seat cooperates with the push plate, and tooth grooves are provided at equal intervals on the top of the push plate.

[0012] Preferably, a screw is rotatably connected between the inner walls of the bottom of the bioreactor, the slide seat is threadedly sleeved on the screw, a moving motor is provided on the side of the bioreactor, and the output shaft of the moving motor is fixedly connected to the end of the screw; The guide rod is arranged between the bottom inner wall of the biological reaction tank.

[0013] The present invention also discloses a biological coupling treatment method for high-salt organic wastewater, comprising the following steps: S1. Introduce high-salt organic wastewater into the pretreatment unit to remove large particle impurities, suspended matter and some soluble organic matter in the wastewater to reduce the load of subsequent treatment units; S2, introducing the pretreated wastewater into the halotolerant bacteria bioreactor, using halotolerant bacteria to preliminarily degrade organic matter in the wastewater to reduce the organic load of the wastewater; S3, introducing the wastewater treated by the salt-tolerant bacteria bioreactor into the biofilm reactor, starting the aeration assembly, and the external air supply system aerates the bioreactor through the gas collecting pipe and the aeration pipe to provide oxygen for the microorganisms, and at the same time, the tooth grooves on the push plate are meshed with the gears on the aeration pipe, and the push plate is driven to move linearly to adjust the angle of the aeration pipe, thereby improving the uniformity of aeration and enhancing the gas-liquid mass transfer effect. At the same time, the microorganisms in the activated sludge contact with the organic matter in the wastewater to remove the organic matter in the wastewater; S4. Use the push flow assembly to drive the push plate to move linearly and reciprocatingly and rotate to push the wastewater to circulate in the biological reaction tank to prevent the activated sludge from depositing; S5. Start the limit assembly, the electric telescopic rod is extended and retracted, driving the movable plate to move up and down, and the isolation seat limits the elastic seat to prevent the membrane group from displacement and damage under the impact of water flow. At the same time, the isolation seat is used to adjust the distance between the membrane groups; S6. The wastewater after the contact reaction with the activated sludge is filtered and separated by the membrane group. The filtered water enters the manifold, and then is collected to the manifold through the drainage pipe, and finally discharged through the manifold and flange pipe; S7, introducing the biologically treated wastewater into a physical and chemical treatment unit to further remove pollutants such as residual organic matter, heavy metal ions and chromaticity in the wastewater; S8. The wastewater after physical and chemical treatment is introduced into the desalination unit to remove the salt in the wastewater, reduce the salt content of the wastewater, make the water quality meet the discharge standard or reuse requirements, and finally post-treat the wastewater to ensure that the effluent water quality meets the final discharge or reuse standards.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention utilizes the aeration tube of the aeration assembly and the push plate of the push flow assembly to be linked through the structure of gears and tooth grooves, utilizes the turbidity sensor in the biological reaction tank to detect the activated sludge concentration, and adaptively adjusts the angle of the aeration tube according to the concentration distribution, so that the bubble distribution is uniform, the oxygen content in each area is kept uniform, the gas-liquid mass transfer effect and the organic matter degradation efficiency are improved, and the conditions of low gas-liquid mixing efficiency, high energy consumption and uneven bubble distribution of the traditional aeration device in a high-salt environment are improved.

[0015] 2. The present invention utilizes the push flow assembly to drive the push plate to move back and forth and rotate linearly, which can effectively promote the circulation of wastewater in the biological reaction tank to prevent the deposition of activated sludge. At the same time, when the membrane group is blocked, the membrane group can be cleaned by the linkage cooperation of the limit assembly and the push flow assembly and the liquid flow sensor, thus solving the problem of sludge accumulation in the gap between the membrane groups and adhesion to the outside of the membrane groups causing blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the shaft side structure of the present invention; Figure 4 It is a schematic diagram of the structure of the MBR membrane module of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the MBR membrane assembly of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram at B in the middle.

[0017] In the figure: 1. biological reactor; 2. MBR membrane assembly; 201. frame; 202. bottom frame; 203. top frame; 204. manifold; 205. elastic seat; 206. membrane group; 207. drainage pipe; 208. manifold; 209. collecting pipe; 210. flange pipe; 3. aeration assembly; 301. manifold; 302. aeration pipe; 303. air inlet pipe; 304. gear; 4. limit assembly; 401. support plate; 402. electric telescopic rod; 403. movable plate; 404. isolation seat; 405. U-shaped seat; 406. slide rail; 5. flow pushing assembly; 501. guide rod; 502. slide seat; 503. screw; 504. rotating motor; 505. electric push rod; 506. push plate; 507. tooth groove; 508. moving motor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0019] See also Figure 1-7 This embodiment provides a biological coupling treatment device for high-salt organic wastewater, including a pretreatment unit, a biological treatment unit, a physicochemical treatment unit, a desalination unit and a post-treatment unit, wherein the biological treatment unit includes a salt-tolerant bacteria bioreactor and a biofilm reactor.

[0020] The pretreatment unit is used to remove suspended solids, adjust water quality and quantity, and reduce the subsequent treatment load, including: Screen: removes large suspended particles.

[0021] Regulating tank: balance water quality and quantity, and adjust pH value.

[0022] Sedimentation tank: removes suspended matter by gravity settling.

[0023] Primary filtration device: Use sand filtration or microfiltration to further remove fine particles in the wastewater.

[0024] The biological treatment unit uses salt-tolerant microorganisms to degrade organic matter, including: Salt-tolerant bacteria bioreactor: uses salt-tolerant bacteria (such as halophiles and salt-tolerant yeast) to provide oxygen through aeration to promote microbial growth and organic matter degradation.

[0025] Biofilm reactor (MBR): Utilize biofilm technology to increase microbial concentration and degradation efficiency, and combine with membrane separation to achieve separation of sludge and water.

[0026] The physical and chemical treatment unit is used to remove refractory organic matter and salts, including: Using the advanced oxidation process (AOP), Fenton's reagent (H2O2+Fe² + ) or ozone oxidation to decompose difficult-to-degrade organic matter.

[0027] Adsorption device: Use activated carbon or resin to adsorb residual organic matter.

[0028] Membrane separation technology: using reverse osmosis (RO) or nanofiltration (NF) membranes to remove salt and organic matter.

[0029] The post-treatment unit is used to ensure that the effluent quality meets the standards and to treat the sludge, including: Disinfection device: Use ultraviolet light (UV) or sodium hypochlorite to disinfect and kill pathogenic microorganisms.

[0030] Sludge treatment equipment: sludge concentration, dehydration (using plate and frame filter press or centrifuge), sludge drying or incineration.

[0031] It also includes automatic control and monitoring systems to achieve automatic operation and real-time monitoring, including: PLC control system: automatically adjust the operating parameters of each unit.

[0032] Online monitoring system: Use sensors to monitor key indicators such as pH, COD, TDS, dissolved oxygen (DO), and transmit data to the central control room to achieve remote monitoring.

[0033] The biofilm reactor includes a bioreactor 1 and an MBR membrane assembly 2. The bioreactor 1 contains activated sludge. The MBR membrane assembly 2 is used to separate sludge and water. An aeration assembly 3 and a limiting assembly 4 are provided at the bottom of the MBR membrane assembly 2. The aeration assembly 3 is used to supply an appropriate amount of oxygen into the bioreactor 1. The limiting assembly 4 is used to limit the positions of the membrane groups 206 so that a certain distance is maintained between the membrane groups 206. A plug flow assembly 5 is provided on the inner bottom side of the bioreactor 1. The plug flow assembly 5 is used to stir the inner bottom side of the bioreactor 1 to prevent sludge from settling.

[0034] The MBR membrane assembly 2 includes a frame 201, wherein a bottom frame 202 and a top frame 203 are respectively disposed on the inner bottom and top sides of the frame 201, two groups of manifolds 204 are symmetrically disposed on both sides of the top frame 203, and two groups of elastic seats 205 are symmetrically disposed on both sides of the bottom frame 202. The elastic seats 205 are made of rubber, and the elastic seats 205 and the manifolds 204 correspond one to one. A membrane group 206 is disposed between the elastic seats 205 and the manifolds 204, and the membrane group 206 is connected to the manifold 204. The membrane group 206 is preferably a flat membrane or a hollow fiber membrane, and the elastic seat 205 is disposed to provide buffer protection for the membrane group 206.

[0035] The top of the manifold 204 is fixedly connected to a drainage pipe 207, the end of the drainage pipe 207 is fixedly connected to a collecting pipe 208, the collecting pipe 208 is fixedly connected to the top of the frame 201, a collecting pipe 209 is provided in the middle of the collecting pipe 208, the collecting pipe 209 is connected to the input port of the external water diversion pump through the flange pipe 210, under the suction action of the external water diversion pump, the sewage after reacting with the activated sludge in the biological reaction tank 1 is sucked into the membrane group 206, the wastewater and the sludge are separated, enter the collecting pipe 208 through the drainage pipe 207, and then are led out through the collecting pipe 209 and the flange pipe 210, and discharged to the next process through the output port of the water diversion pump.

[0036] The aeration assembly 3 includes an air collecting pipe 301, two groups of aeration pipes 302 are symmetrically arranged on both sides of the air collecting pipe 301, aeration holes are evenly opened on the aeration pipes 302, one end of the aeration pipe 302 away from the air collecting pipe 301 is arranged on a pipe rack fixed at the bottom of the frame 201, and an air inlet pipe 303 is arranged at the end of the air collecting pipe 301, and the air inlet pipe 303 is connected to an external air supply system. After the external air supply system supplies high-pressure gas into the air inlet pipe 303, the high-pressure gas enters each aeration pipe 302 through the air collecting pipe 301, and is discharged into the wastewater in the biological reaction tank 1 through the aeration holes, thereby realizing oxygen supply to the biological reaction tank 1.

[0037] The limiting assembly 4 includes a support plate 401, which is arranged in the middle of the bottom side of the frame 201, and an electric telescopic rod 402 is provided in the middle of the top surface of the support plate 401. A movable plate 403 is provided at the top telescopic end of the electric telescopic rod 402. Two groups of isolation seats 404 are symmetrically provided on both sides of the top of the movable plate 403. Each isolation seat 404 is located between two adjacent elastic seats 205. The isolation seat 404 is used to separate each elastic seat 205 so that a suitable distance is maintained between each membrane group 206 to ensure the circulation of sewage and prevent the membrane group 206 from being displaced and damaged under the impact of water flow.

[0038] Both ends of the support plate 401 are slidably connected with slide rails 406 , and the slide rails 406 on both sides are fixedly connected to the inner sides of the frame 201 , respectively. The setting of the slide rails 406 enables the support plate 401 to move slightly in the horizontal direction.

[0039] The isolation seat 404 is an isosceles trapezoidal structure. By setting the isolation seat 404 as an isosceles trapezoidal structure, the isolation seat 404 can be moved up and down and the inclined surfaces on both sides of the isolation seat 404 can be used to achieve the mutual distance between the elastic seats 205 on both sides.

[0040] The flow pushing component 5 includes a guide rod 501, which is arranged between the bottom inner walls of the biological reaction tank 1. A slide seat 502 is slidably sleeved on the guide rod 501. A rotating motor 504 is arranged on the top of the slide seat 502. An electric push rod 505 is arranged on the output shaft of the rotating motor 504. A push plate 506 is arranged on the top telescopic end of the electric push rod 505. A screw rod 503 is rotatably connected between the bottom inner walls of the biological reaction tank 1. The slide seat 502 is threadedly sleeved on the screw rod 503. A mobile motor 508 is arranged on the side of the biological reaction tank 1. The output shaft of the mobile motor 508 is fixedly connected to the end of the screw rod 503.

[0041] Specifically, the screw rod 503 is driven to rotate by the rotation of the moving motor 508, and the horizontal movement of the slide 502 is achieved under the limit of the guide rod 501. At this time, the electric push rod 505 is driven to rotate by the rotating motor 504 to achieve the rotation of the push plate 506, so that the bottom of the sewage in the biological reaction tank 1 can be stirred to prevent sludge from settling.

[0042] When in use, after the wastewater enters the pretreatment unit, it first passes through the screen to remove large suspended particles (such as fiber, sand and gravel), and then enters the equalization tank. Through pH adjustment and water volume buffering, the stability of the water inlet of subsequent units is ensured. Then the wastewater enters the sedimentation tank and uses gravity sedimentation to remove medium-density suspended matter (such as silt). Secondly, the wastewater passes through the primary filtration device to intercept fine particles (particle size > 50μm) to prevent clogging of subsequent bioreactors.

[0043] Then, the wastewater enters the halotolerant bacteria bioreactor of the biological treatment unit. By adding halotolerant bacteria, halotolerant yeast and other halotolerant bacteria, oxygen is injected into the wastewater through the bottom aeration device to maintain dissolved oxygen. The halotolerant bacteria metabolize organic matter (COD degradation rate 60%-80%) in a high salt environment (TDS 1%-15%) to produce CO2, H2O and a small amount of sludge.

[0044] Secondly, the wastewater enters the biofilm reactor (MBR), and the microorganisms in the activated sludge in the biological reaction tank 1 are used to further degrade the residual organic matter. At the same time, the movable motor 508 is rotated in a positive and negative cycle to drive the screw 503 to rotate in a positive and negative direction, so that the slide 502 drives the top push plate 506 to reciprocate linearly, and the rotary motor 504 is used to drive the electric push rod 505 and the push plate 506 to rotate, so as to stir the bottom of the biological reaction tank 1 to prevent the sludge from settling. The electric push rod 505 is used to drive the push plate 506 to rise and fall to adjust the stirring depth, and the aeration component 3 and the external air supply system are used to aerate the biological reaction tank 1 through the air inlet pipe 303, the air collecting pipe 301 and the aeration pipe 302 to generate a large number of bubbles, so as to provide oxygen for the microorganisms in the biological reaction tank 1.

[0045] Secondly, start the external water pump, and extract the wastewater through the membrane group 206 through the flange pipe 210, the collecting pipe 209, the collecting pipe 208 and the drainage pipe 207, while retaining the sludge in the biological reaction tank 1, and the wastewater is discharged to the next process through the output end of the water pump.

[0046] Before the sludge is separated from the wastewater, the electric telescopic rod 402 is raised and lowered to drive the isolation seat 404 to rise and fall through the movable plate 403, so as to adjust the distance between the membrane groups 206 as needed, so as to ensure the permeability of the membrane group 206 and reduce the cleaning frequency.

[0047] However, due to the uneven distribution of the concentration of activated sludge in the biological reactor 1, the oxygen demand of microorganisms in different areas is different, that is, the area with high activated sludge concentration has a larger oxygen demand, and the oxygen provided by aeration can only be in a fixed position. The oxygen provided during the aeration process cannot be adjusted according to the concentration of activated sludge in different areas, resulting in excess oxygen in some areas and insufficient oxygen in some areas, resulting in reduced activity of sludge microorganisms. Therefore, the following improvements are made: A gear 304 is fixedly sleeved in the middle of each aeration tube 302, and teeth grooves 507 are evenly spaced on the top of the push plate 506. The gear 304 meshes with the teeth groove 507 on the top of the push plate 506, and the linear motion of the push plate 506 drives the gear 304 to rotate, and the gear 304 drives the aeration tube 302 to rotate, thereby realizing the rotation of the aeration tube 302, so that the direction angle of the aeration holes distributed along the axial direction of the aeration tube 302 changes.

[0048] Turbidity sensors are provided on both side walls of the biological reaction tank 1 for detecting the concentration of activated sludge on both sides of the biological reaction tank 1 .

[0049] When in use, the rotary motor 504 is used to drive the push plate 506 to rotate so that the push plate 506 is parallel to the guide rod 501. At this time, the turbidity sensors on both sides are used to detect the distribution concentration of the activated sludge in the biological reaction tank 1. When it is detected that the activated sludge concentration on one side is greater than that on the other side, the mobile motor 508 is started to drive the screw 503 to rotate, so that the push plate 506 moves to the aeration pipe 302 close to the side of the high-concentration activated sludge, and then the electric push rod 505 is extended to drive the push plate 506 to move upward, so that the tooth groove 507 on the top of the push plate 506 is engaged with the gear 304 on this side, and the mobile motor 508 is used again to drive the screw 503 to rotate through the slide 502 to drive the push plate 506 to move linearly, adjust the angle of the aeration hole, so that the aeration hole faces the side of the high-concentration activated sludge, thereby increasing the oxygen content on this side, effectively ensuring the activity of microorganisms, and improving the degradation efficiency of organic matter in wastewater. Therefore, the present invention uses the linkage cooperation between the flow plug component 5 and the aeration component 3 to adaptively adjust the aeration amount according to the concentration distribution of the activated sludge.

[0050] In addition, as the wastewater is discharged through the membrane group 206, and the distance between each membrane group 206 is limited, the sludge will gather in the gap between the membrane groups 206, and the sludge and inorganic salt scaling will also adhere to the outside of the membrane group 206, thereby causing the blockage of the membrane group 206. Therefore, the following improvements are made: A liquid flow sensor is provided on the flange pipe 210 , and the liquid flow sensor is used to detect the liquid flow passing through the flange pipe 210 , so as to determine the working state of the membrane group 206 .

[0051] A U-shaped seat 405 is provided at the bottom of the support plate 401 , and the U-shaped seat 405 cooperates with the push plate 506 .

[0052] During use, when the liquid flow sensor detects that the amount of wastewater passing through the flange pipe 210 is less than the set threshold, it is actively determined that the membrane group 206 is blocked. At this time, the water pump is turned off to stop the extraction of wastewater, and the electric telescopic rod 402 is started, and the electric telescopic rod 402 drives the movable plate 403 to reciprocate and lift, so as to realize the reciprocating lifting of the isolation seat 404. Since the isolation seat 404 is an isosceles trapezoidal structure, and the inclined surfaces on both sides of the isolation seat 404 respectively conflict with the edges of the elastic seats 205 on both sides, the opening and closing of the elastic seats 205 on both sides are realized, thereby intermittently increasing the bottom distance between the two adjacent membrane groups 206. At the same time, the rotary motor 504 is used to drive the push plate 506 to rotate, so that the push plate 506 is perpendicular to the guide rod 501, and then the electric push rod 505 is used to drive the push plate 50 6 moves upward, so that the push plate 506 is located in the U-shaped seat 405. At this time, the mobile motor 508 is moved slightly forward and reverse, so that the push plate 506 is reciprocated slightly at high frequency in the horizontal direction, and the U-shaped seat 405 and the support plate 401 are driven to reciprocate slightly at high frequency along the slide rail 406, so as to realize the high frequency reciprocating movement of the movable plate 403 and the isolation seat 404, so that the elastic seat 205 and the membrane group 206 vibrate slightly at high frequency, and the bottom spacing between each membrane group 206 is intermittently increased through the reciprocating lifting of the isolation seat 404, so as to remove the sludge attached to the side of the membrane group 206 and the sludge accumulated in the gap between the membrane groups 206. Therefore, the present invention removes the sludge attached to and accumulated on the side of the membrane group 206 and the inorganic salt scaling through the linkage cooperation of the structure between the limit component 4 and the flow-pushing component 5. Embodiment 2

[0053] This embodiment provides a biological coupling treatment method for high-salinity organic wastewater, the steps are as follows: S1. Introduce high-salt organic wastewater into the pretreatment unit to remove large particle impurities, suspended matter and some soluble organic matter in the wastewater to reduce the load of subsequent treatment units; S2, introducing the pretreated wastewater into the halotolerant bacteria bioreactor, using halotolerant bacteria to preliminarily degrade organic matter in the wastewater to reduce the organic load of the wastewater; S3, introducing the wastewater treated by the salt-tolerant bacteria bioreactor into the biofilm reactor, starting the aeration assembly 3, and the external air supply system aerates the bioreactor 1 through the gas collecting pipe 301 and the aeration pipe 302 to provide oxygen for the microorganisms, and at the same time, the tooth groove 507 on the push plate 506 is meshed with the gear 304 on the aeration pipe 302, and the push plate 506 is driven to move linearly to adjust the angle of the aeration pipe 302, thereby improving the uniformity of aeration and enhancing the gas-liquid mass transfer effect, and at the same time, the microorganisms in the activated sludge contact with the organic matter in the wastewater to remove the organic matter in the wastewater; S4, using the push flow assembly 5 to drive the push plate 506 to move linearly and reciprocatingly and to rotate to push the wastewater to circulate in the biological reaction tank 1, thereby preventing the activated sludge from depositing; S5, start the limit assembly 4, the electric telescopic rod 402 is extended and retracted, driving the movable plate 403 to move up and down, and the isolation seat 404 limits the elastic seat 205 to prevent the membrane group 206 from being displaced and damaged under the impact of water flow. At the same time, the isolation seat 404 is used to adjust the distance between the membrane groups 206 by lifting and lowering; S6. The wastewater after the contact reaction with the activated sludge is filtered and separated by the membrane group 206. The filtered water enters the manifold 204, and then is collected to the manifold 208 through the drainage pipe 207, and finally discharged through the manifold 209 and the flange pipe 210; S7, introducing the biologically treated wastewater into a physical and chemical treatment unit to further remove pollutants such as residual organic matter, heavy metal ions and chromaticity in the wastewater; S8. The wastewater after physical and chemical treatment is introduced into the desalination unit to remove the salt in the wastewater, reduce the salt content of the wastewater, make the water quality meet the discharge standard or reuse requirements, and finally post-treat the wastewater to ensure that the effluent water quality meets the final discharge or reuse standards.

[0054] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A biological coupling treatment device for high-salinity organic wastewater, comprising a pretreatment unit, a biological treatment unit, a physical and chemical treatment unit, a desalination unit and a post-treatment unit, wherein the biological treatment unit comprises a salt-tolerant bacteria bioreactor and a biofilm reactor, and the biofilm reactor comprises a biological reaction tank (1) and an MBR membrane assembly (2), characterized in that: The biological reaction tank (1) contains activated sludge, the bottom of the MBR membrane assembly (2) is provided with an aeration assembly (3) and a limit assembly (4), and the bottom side of the biological reaction tank (1) is provided with a flow plug assembly (5); The MBR membrane assembly (2) comprises a frame (201), wherein the bottom side and top side of the frame (201) are respectively provided with a bottom frame (202) and a top frame (203), two groups of manifolds (204) are symmetrically provided on both sides of the top frame (203), two groups of elastic seats (205) are symmetrically provided on both sides of the bottom frame (202), and a membrane assembly (206) is provided between the elastic seats (205) and the manifolds (204); The aeration assembly (3) comprises an air collecting pipe (301), two groups of aeration pipes (302) are symmetrically arranged on both sides of the air collecting pipe (301), and a gear (304) is fixedly sleeved in the middle of each aeration pipe (302); The position limiting assembly (4) comprises a support plate (401), an electric telescopic rod (402) is provided in the middle of the top surface of the support plate (401), a movable plate (403) is provided at the top telescopic end of the electric telescopic rod (402), and two groups of isolation seats (404) are symmetrically provided on both sides of the top of the movable plate (403); The flow pushing assembly (5) comprises a guide rod (501), a slide seat (502) being slidably sleeved on the guide rod (501), a rotating motor (504) being provided on the top of the slide seat (502), an electric push rod (505) being provided on the output shaft of the rotating motor (504), and a push plate (506) being provided on the top telescopic end of the electric push rod (505).

2. The biological coupling treatment device for high-salinity organic wastewater according to claim 1 is characterized in that: The elastic seat (205) and the manifold (204) correspond one to one, the membrane group (206) is connected to the manifold (204), the top of the manifold (204) is fixedly connected to a drainage pipe (207), the end of the drainage pipe (207) is fixedly connected to a collecting pipe (208), the collecting pipe (208) is fixedly connected to the top of the frame (201), a collecting pipe (209) is provided in the middle of the collecting pipe (208), the collecting pipe (209) is connected to the input port of an external water diversion pump through a flange pipe (210), and a liquid flow sensor is provided on the flange pipe (210).

3. The biological coupling treatment device for high-salinity organic wastewater according to claim 1 is characterized in that: Aeration holes are evenly arranged on the aeration pipe (302); one end of the aeration pipe (302) away from the air collecting pipe (301) is arranged on a pipe rack fixed to the bottom of the frame (201); an air intake pipe (303) is arranged at the end of the air collecting pipe (301); and the air intake pipe (303) is connected to an external air supply system.

4. The biological coupling treatment device for high-salinity organic wastewater according to claim 1 is characterized by: The isolation seat (404) is an isosceles trapezoidal structure, and each isolation seat (404) is located between two adjacent elastic seats (205). The support plate (401) is arranged in the middle of the bottom side of the frame (201), and the two ends of the support plate (401) are slidably connected to the slide rails (406), and the slide rails (406) on both sides are fixedly connected to the inner sides of the frame (201) respectively.

5. The biological coupling treatment device for high-salinity organic wastewater according to claim 4 is characterized in that: A U-shaped seat (405) is provided at the bottom of the support plate (401), and the U-shaped seat (405) cooperates with a push plate (506). Tooth grooves (507) are provided at equal intervals on the top of the push plate (506).

6. The biological coupling treatment device for high-salinity organic wastewater according to claim 1 is characterized by: A screw rod (503) is rotatably connected between the inner walls of the bottom of the biological reaction tank (1), the slide seat (502) is threadedly sleeved on the screw rod (503), a movable motor (508) is provided on the side of the biological reaction tank (1), and the output shaft of the movable motor (508) is fixedly connected to the end of the screw rod (503); The guide rod (501) is arranged between the bottom inner wall of the biological reaction tank (1).

7. A biological coupling treatment method for high-salinity organic wastewater, wherein the treatment method utilizes the biological coupling treatment device for high-salinity organic wastewater according to any one of claims 1 to 6 to achieve high-salinity organic wastewater treatment, characterized in that: The following steps are involved: S1. Introduce high-salt organic wastewater into the pretreatment unit to remove large particle impurities, suspended matter and some soluble organic matter in the wastewater to reduce the load of subsequent treatment units; S2, introducing the pretreated wastewater into the halotolerant bacteria bioreactor, using halotolerant bacteria to preliminarily degrade organic matter in the wastewater to reduce the organic load of the wastewater; S3, introducing the wastewater treated by the salt-tolerant bacteria bioreactor into the biofilm reactor, starting the aeration assembly (3), and the external air supply system aerates the bioreactor (1) through the gas collecting pipe (301) and the aeration pipe (302) to provide oxygen for the microorganisms, while the tooth groove (507) on the push plate (506) meshes with the gear (304) on the aeration pipe (302), and the push plate (506) is driven to move linearly to adjust the angle of the aeration pipe (302), thereby improving the uniformity of aeration and enhancing the gas-liquid mass transfer effect. At the same time, the microorganisms in the activated sludge contact with the organic matter in the wastewater to remove the organic matter in the wastewater; S4, using the push flow assembly (5) to drive the push plate (506) to move linearly back and forth and rotate to push the wastewater to circulate in the biological reaction tank (1), thereby preventing the activated sludge from depositing; S5, starting the limit assembly (4), the electric telescopic rod (402) is extended and retracted, driving the movable plate (403) to move up and down, and the isolation seat (404) limits the elastic seat (205) to prevent the membrane group (206) from being displaced and damaged under the impact of the water flow, and at the same time, the isolation seat (404) is used to raise and lower the spacing between the membrane groups (206); S6, the wastewater after the contact reaction with the activated sludge passes through the membrane group (206) to achieve sludge filtration and separation, and the filtered water enters the manifold (204), and then is collected into the manifold (208) through the drainage pipe (207), and finally discharged through the manifold (209) and the flange pipe (210); S7, introducing the biologically treated wastewater into a physical and chemical treatment unit to further remove residual organic matter, heavy metal ions and chromaticity pollutants in the wastewater; S8. Introduce the wastewater after physical and chemical treatment into the desalination unit to remove the salt in the wastewater, reduce the salt content of the wastewater, make the water quality meet the discharge standard or reuse requirements, and finally post-treat the wastewater to ensure that the effluent water quality meets the final discharge standard.

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