A device and method for biological coupling treatment of high-salt organic wastewater

Abstract

This invention discloses a biological coupling treatment device and method for high-salt organic wastewater, relating to the field of wastewater treatment technology. The biological coupling treatment includes a pretreatment unit, a biological treatment unit, a physicochemical treatment unit, a desalination unit, and a post-treatment unit. The biological treatment unit includes a halophilic bacteria bioreactor and a biofilm reactor. The biofilm reactor includes a bioreactor tank and an MBR membrane module. The bioreactor tank contains activated sludge. The bottom of the MBR membrane module is equipped with an aeration component and a limiting component. The bottom of the bioreactor tank is equipped with a flow propulsion component. The MBR membrane module includes a frame. This invention effectively reduces inorganic salt scaling and organic matter deposition on the surface of the MBR membrane, ensuring the permeability of the MBR membrane, reducing the cleaning frequency, and extending the membrane's service life. In addition, by optimizing the aeration structure, the bubble distribution is uniform, ensuring that the oxygen content in each area remains uniform.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a biological coupling treatment device and method for high-salt organic wastewater. Background Technology

[0002] High-salinity organic wastewater refers to wastewater containing high concentrations of inorganic salts (typically total salt concentration greater than 1%) and organic pollutants. These organic pollutants include, but are not limited to, sugars, proteins, oils, phenols, and hydrocarbons. High-salinity environments inhibit microorganisms, and the salt content also affects the physicochemical properties of the wastewater, making the treatment process more complex. Among these methods, biological coupling treatment is an effective means of treating high-salinity organic wastewater.

[0003] Chinese patent application number 2019114241097 discloses a method and apparatus for treating high-salt organic wastewater, which is achieved through the following functional zones: a process enhancement zone, a multi-stage vaporization zone, a buffer adjustment zone, a crystallization separation zone, and a biological treatment zone. In the process enhancement zone, the high-salt organic wastewater undergoes process enhancement under the action of packing material and field effect, thereby changing the physicochemical properties of the solution and lowering the vaporization temperature of the solvent. It then enters the multi-stage vaporization zone at the bottom of the main reactor to accelerate the vaporization rate of the solvent. The buffer adjustment zone regulates the liquid level of the concentrate in the main reactor bottom, and part of the concentrate is recycled back to the multi-stage vaporization zone. The remaining concentrate in the buffer adjustment zone enters the crystallization separation zone to crystallize out impurities in the concentrate. The vaporized steam is condensed, and the condensate enters the biological treatment zone to remove organic matter. However, the treatment effect is still relatively poor when treating high-salt organic wastewater.

[0004] In addition, existing technologies use MBR membrane bioreactors to treat high-salt organic wastewater. However, existing membrane modules are susceptible to dual fouling from inorganic salt scaling and organic matter deposition in high-salt environments, and the membrane surface is easily clogged, leading to a decrease in flux and the need for frequent cleaning, which shortens the membrane life. Furthermore, in high-salt environments, traditional aeration devices suffer from low gas-liquid mixing efficiency and high energy consumption. For example, high-salt wastewater treatment requires higher aeration intensity to maintain sludge activity, but existing aerators have uneven bubble distribution, 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 MBR membrane, ensures the permeability of MBR membrane, reduces the cleaning frequency, and extends the service life of membrane. In addition, by optimizing the aeration structure, the bubble distribution is made 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 objectives, the present invention provides the following technical solution: a biological coupling treatment device for high-salt organic wastewater, comprising a pretreatment unit, a biological treatment unit, a physicochemical treatment unit, a desalination unit, and a post-treatment unit. The biological treatment unit includes a salt-tolerant bacteria bioreactor and a biofilm reactor. The biofilm reactor includes a biological reaction tank and an MBR membrane module. The biological reaction tank contains activated sludge. The bottom of the MBR membrane module is provided with an aeration component and a limiting component. The bottom of the biological reaction tank is provided with a flow propulsion component.

[0007] The MBR membrane module includes a frame, with a base frame and a top frame respectively provided on the bottom and top sides of the frame. Two sets of manifolds are symmetrically provided on both sides of the top frame, and two sets of elastic seats are symmetrically provided on both sides of the base frame. The membrane module is provided between the elastic seats and the manifolds.

[0008] The aeration assembly includes an air collection pipe, and two sets of aeration pipes are symmetrically arranged on both sides of the air collection pipe. A gear is fixedly sleeved in the middle of each aeration pipe.

[0009] The limiting component includes a support plate, an electric telescopic rod is provided in the middle of the top surface of the support plate, a movable plate is provided at the top telescopic end of the electric telescopic rod, and two sets of isolation seats are symmetrically provided on the top two sides of the movable plate.

[0010] Preferably, the elastic seat and the manifold correspond one-to-one, the membrane assembly 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, the middle of the collecting pipe is provided with a converging pipe, the converging pipe is connected to the input port of an external water pump through a flange pipe, and a liquid flow sensor is provided on the flange pipe.

[0011] Preferably, the aeration pipe has aeration holes evenly distributed on it, the end of the aeration pipe away from the air collecting pipe is located on a pipe rack fixed to the bottom of the frame, and the end of the air collecting pipe is provided with an air inlet pipe, which is connected to an external air supply system.

[0012] Preferably, the isolation seat is an isosceles trapezoidal structure, each isolation seat is located between two adjacent elastic seats, the support plate is located in the middle of the bottom side of the frame, and the two ends of the support plate are slidably connected to slide rails, and the slide rails on both sides are fixedly connected to the inner sides of the frame.

[0013] Preferably, the propulsion assembly includes a guide rod, a slide block is slidably sleeved on the guide rod, a rotary motor is provided on the top of the slide block, an electric push rod is provided on the output shaft of the rotary motor, and a push plate is provided on the top telescopic end of the electric push rod.

[0014] Preferably, the bottom of the support plate is provided with a U-shaped seat, which cooperates with the push plate, and the top of the push plate is provided with equally spaced toothed grooves.

[0015] Preferably, a screw is rotatably connected between the bottom inner walls of the bioreactor, the slide is threaded onto the screw, and a moving motor is provided on the side of the bioreactor, the output shaft of the moving motor being fixedly connected to the end of the screw.

[0016] The guide rod is located between the bottom inner walls of the bioreactor.

[0017] This invention also discloses a biological coupling treatment method for high-salt organic wastewater, comprising the following steps:

[0018] S1. High-salt organic wastewater is introduced into the pretreatment unit to remove large particulate impurities, suspended solids and some soluble organic matter from the wastewater, so as to reduce the load on the subsequent treatment unit.

[0019] S2. The pretreated wastewater is introduced into a salt-tolerant bacteria bioreactor, where salt-tolerant bacteria are used to initially degrade the organic matter in the wastewater, thereby reducing the organic load of the wastewater.

[0020] S3. The wastewater treated by the salt-tolerant bacteria bioreactor is introduced into the biofilm reactor. The aeration components are started. The external air supply system provides oxygen to the microorganisms in the bioreactor through the air collection pipe and the aeration pipe. At the same time, the toothed groove on the push plate meshes with the gear on the aeration pipe. The push plate is driven to move linearly to adjust the angle of the aeration pipe, improve the uniformity of aeration, and enhance the gas-liquid mass transfer effect. Meanwhile, the microorganisms in the activated sludge come into contact with the organic matter in the wastewater to remove the organic matter in the wastewater.

[0021] S4. The flow propulsion component is used to drive the push plate to reciprocate linearly and rotate to circulate the wastewater in the biological reactor, preventing the deposition of activated sludge.

[0022] S5. Start the limit component, the electric telescopic rod extends and retracts, driving the movable plate to move up and down. The isolation seat limits the elastic seat to prevent the membrane module from being displaced and damaged under the impact of water flow. At the same time, the distance between the membrane modules is adjusted by raising and lowering the isolation seat.

[0023] S6. The wastewater after contact reaction with activated sludge is filtered and separated from the sludge through the membrane module. The filtered water enters the manifold, then is collected into the collection pipe through the diversion pipe, and finally discharged through the collection pipe and flange pipe.

[0024] S7. Introduce the biologically treated wastewater into the physicochemical treatment unit to further remove residual organic matter, heavy metal ions, color and other pollutants from the wastewater;

[0025] 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, and make the water quality meet the discharge standards or reuse requirements. Finally, the wastewater is post-treated to ensure that the effluent quality meets the final discharge or reuse standards.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. This invention utilizes the linkage between the aeration pipe of the aeration component and the pusher plate of the propulsion component through a gear and toothed structure. It uses a turbidity sensor in the biological reactor to detect the concentration of activated sludge and adaptively adjusts the angle of the aeration pipe according to the concentration distribution, so that the bubble distribution is uniform and the oxygen content in each area is kept uniform. This improves the gas-liquid mass transfer effect and organic matter degradation efficiency, and improves the situation of low gas-liquid mixing efficiency, high energy consumption and uneven bubble distribution of traditional aeration devices in high-salt environments.

[0028] 2. This invention utilizes a propulsion component to drive the pusher plate in linear reciprocating motion and rotation, which can effectively promote the circulation of wastewater in the biological reactor, preventing activated sludge deposition. At the same time, when the membrane module becomes clogged, the limiting component and the propulsion component work together in conjunction with a liquid flow sensor to detect and clean the membrane module, solving the problem of sludge accumulating in the gaps between the membrane modules and adhering to the outside of the membrane module, causing blockage. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the axial structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the MBR membrane module structure of the present invention;

[0033] Figure 5 This is a schematic cross-sectional view of the MBR membrane module of the present invention;

[0034] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0035] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B.

[0036] In the diagram: 1. Bioreactor; 2. MBR membrane module; 201. Frame; 202. Base frame; 203. Top frame; 204. Manifold; 205. Elastic seat; 206. Membrane module; 207. Drainage pipe; 208. Collection pipe; 209. Collection pipe; 210. Flange pipe; 3. Aeration assembly; 301. Air collection pipe; 302. Aeration pipe; 303. Air inlet pipe; 304. Gear; 4. Limiting assembly; 401. Support plate; 402. Electric telescopic rod; 403. Movable plate; 404. Isolation seat; 405. U-shaped seat; 406. Slide rail; 5. Flow propulsion assembly; 501. Guide rod; 502. Slide seat; 503. Screw; 504. Rotary motor; 505. Electric push rod; 506. Push plate; 507. Gear; 508. Moving motor. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0038] Please see 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. The biological treatment unit includes a salt-tolerant bacteria bioreactor and a biofilm reactor.

[0039] The pretreatment unit is used to remove suspended solids, adjust water quality and quantity, and reduce the load on subsequent treatment processes. Specifically, it includes:

[0040] Grille: Removes large suspended particles.

[0041] Equalization tank: Balances water quality and quantity, and adjusts pH value.

[0042] Sedimentation tank: Removes suspended solids by gravity settling.

[0043] Primary filtration unit: Sand filtration or microfiltration is used to further remove fine particles from wastewater.

[0044] The biological treatment unit utilizes salt-tolerant microorganisms to degrade organic matter, specifically including:

[0045] Salt-tolerant bacterial bioreactor: It uses salt-tolerant bacterial strains (such as halophilic bacteria and salt-tolerant yeasts) to provide oxygen through aeration, which promotes the growth of microorganisms and the degradation of organic matter.

[0046] Biofilm reactor (MBR): Utilizes biofilm technology to increase microbial concentration and degradation efficiency, and combines it with membrane separation to achieve the separation of sludge and water.

[0047] The physicochemical treatment unit is used to remove recalcitrant organic matter and salts, specifically including:

[0048] Advanced oxidation process (AOP) is used to decompose recalcitrant organic matter using Fenton's reagent (H2O2+Fe²⁺) or ozone oxidation.

[0049] Adsorption device: Uses activated carbon or resin to adsorb residual organic matter.

[0050] Membrane separation technology: using reverse osmosis (RO) or nanofiltration (NF) membranes to remove salts and organic matter.

[0051] The post-treatment unit is used to ensure that the effluent quality meets standards and to treat sludge, specifically including:

[0052] Disinfection device: Uses ultraviolet (UV) light or sodium hypochlorite for disinfection to kill pathogenic microorganisms.

[0053] Sludge treatment equipment: sludge thickening and dewatering (using plate and frame filter press or centrifuge), sludge drying or incineration.

[0054] It also includes automatic control and monitoring systems for automated operation and real-time monitoring, specifically including:

[0055] PLC control system: automatically adjusts the operating parameters of each unit.

[0056] Online monitoring system: Utilizes sensors to monitor key indicators such as pH, COD, TDS, and dissolved oxygen (DO), and transmits the data to the central control room for remote monitoring.

[0057] The biofilm reactor includes a bioreactor 1 and an MBR membrane module 2. The bioreactor 1 contains activated sludge. The MBR membrane module 2 is used for the separation of sludge and water. The bottom of the MBR membrane module 2 is equipped with an aeration component 3 and a limiting component 4. The aeration component 3 is used to supply an appropriate amount of oxygen into the bioreactor 1. The limiting component 4 is used to limit the distance between each membrane module 206, so that each membrane module 206 maintains a certain distance. The bottom of the bioreactor 1 is equipped with a flow propulsion component 5, which is used to agitate the bottom of the bioreactor 1 to prevent sludge from settling.

[0058] MBR membrane module 2 includes a frame 201. The bottom and top sides of the frame 201 are respectively provided with a base frame 202 and a top frame 203. Two sets of manifolds 204 are symmetrically arranged on both sides of the top frame 203. Two sets of elastic seats 205 are symmetrically arranged on both sides of the base frame 202. The elastic seats 205 are made of rubber. The elastic seats 205 and the manifolds 204 correspond one-to-one. A membrane assembly 206 is provided between the elastic seats 205 and the manifolds 204. The membrane assembly 206 is connected to the manifolds 204. The membrane assembly 206 is preferably a flat sheet membrane or a hollow fiber membrane. The elastic seats 205 are provided to provide buffer protection for the membrane assembly 206.

[0059] The top of the manifold 204 is fixedly connected to the drain pipe 207, and the end of the drain pipe 207 is fixedly connected to the collecting pipe 208. The collecting pipe 208 is fixedly connected to the top of the frame 201. The middle part of the collecting pipe 208 is provided with a converging pipe 209. The converging pipe 209 is connected to the input port of an external water pump through a flange pipe 210. Under the suction action of the external water pump, the wastewater after reacting with the activated sludge in the biological reactor 1 is drawn into the membrane module 206. After the wastewater and sludge are separated, they enter the collecting pipe 208 through the drain pipe 207, and then are led out through the converging pipe 209 and the flange pipe 210, and discharged to the next process through the output port of the water pump.

[0060] The aeration assembly 3 includes an air collection pipe 301. Two sets of aeration pipes 302 are symmetrically arranged on both sides of the air collection pipe 301. Aeration holes are evenly opened on the aeration pipes 302. The end of the aeration pipe 302 away from the air collection pipe 301 is set on a pipe rack fixed to the bottom of the frame 201. The end of the air collection pipe 301 is provided with an air inlet pipe 303. The air inlet pipe 303 is connected to an external air supply system. 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 collection pipe 301 and is discharged into the wastewater in the biological reactor 1 through the aeration holes, thereby achieving oxygen supply to the biological reactor 1.

[0061] The limiting component 4 includes a support plate 401, which is located at the bottom center of the frame 201. An electric telescopic rod 402 is provided at the top center of the support plate 401. A movable plate 403 is provided at the top telescopic end of the electric telescopic rod 402. Two sets 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 seats 404 are used to separate the elastic seats 205 so that the membrane modules 206 maintain a suitable distance to ensure the flow of sewage and prevent the membrane modules 206 from being displaced and damaged under the impact of water flow.

[0062] 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. The slide rails 406 allow the support plate 401 to move slightly in the horizontal direction.

[0063] The isolating seat 404 is an isosceles trapezoidal structure. By setting the isolating seat 404 as an isosceles trapezoidal structure, the inclined surfaces on both sides of the isolating seat 404 can be used to make the elastic seats 205 on both sides move away from each other by using the up and down movement of the isolating seat 404.

[0064] The propulsion assembly 5 includes a guide rod 501, which is disposed between the bottom inner walls of the bioreactor 1. A slide block 502 is slidably sleeved on the guide rod 501. A rotary motor 504 is provided on the top of the slide block 502. An electric push rod 505 is provided on the output shaft of the rotary motor 504. A push plate 506 is provided on the top telescopic end of the electric push rod 505. A screw 503 is rotatably connected between the bottom inner walls of the bioreactor 1. The slide block 502 is threaded onto the screw 503. A moving motor 508 is provided on the side of the bioreactor 1. The output shaft of the moving motor 508 is fixedly connected to the end of the screw 503.

[0065] Specifically, the rotation of the mobile motor 508 drives the screw 503 to rotate, and the slide 502 moves horizontally under the limit of the guide rod 501. At this time, the rotation of the electric push rod 505 is driven by the rotary motor 504 to rotate the push plate 506, which can stir the bottom of the sewage in the biological reactor 1 and prevent sludge from settling.

[0066] In operation, wastewater first enters the pretreatment unit and passes through a screen to remove large suspended solids (such as fibers and sand). Then it enters the equalization tank, where pH adjustment and water volume buffering ensure the stability of the influent to subsequent units. Subsequently, the wastewater enters the sedimentation tank, where gravity settling removes medium-density suspended solids (such as silt). Next, the wastewater passes through a primary filtration device to trap fine particles (particle size > 50 μm) to prevent clogging of subsequent bioreactors.

[0067] Then, the wastewater enters the halophilic bacteria bioreactor of the biological treatment unit. By adding halophilic bacteria, halophilic yeast and other halophilic bacteria species, oxygen is injected into the wastewater through the bottom aeration device to maintain dissolved oxygen. The halophilic bacteria metabolize organic matter (COD degradation rate 60%-80%) in a high-salt environment (TDS 1%-15%), generating CO2, H2O and a small amount of sludge.

[0068] Secondly, the wastewater enters the biofilm reactor (MBR), where microorganisms in the activated sludge in the bioreactor 1 further degrade residual organic matter. Simultaneously, the moving motor 508 rotates in both directions, driving the screw 503 to rotate in both directions, causing the slide 502 to drive the top push plate 506 to reciprocate linearly. The rotary motor 504 drives the electric push rod 505 and the push plate 506 to rotate, thereby agitating the bottom of the bioreactor 1 to prevent sludge settling. The electric push rod 505 drives the push plate 506 to rise and fall to adjust the agitation depth. The aeration assembly 3 and the external air supply system aerate the bioreactor 1 through the air inlet pipe 303, air collection pipe 301, and aeration pipe 302, generating a large number of bubbles to provide oxygen for the microorganisms in the bioreactor 1.

[0069] Secondly, the external water pump is started, and the wastewater is drawn out through the membrane module 206 through the flange pipe 210, the collecting pipe 209, the collecting pipe 208 and the diversion pipe 207. At the same time, the sludge in the biological reactor 1 is intercepted, and the wastewater is discharged to the next process through the output end of the water pump.

[0070] Before the sludge and wastewater are separated, the electric telescopic rod 402 is raised and lowered, which drives the isolation seat 404 to rise and fall through the movable plate 403, so as to adjust the distance between the membrane modules 206 as needed, so as to ensure the permeability of the membrane modules 206 and reduce the cleaning frequency.

[0071] However, due to the uneven distribution of activated sludge concentration in bioreactor 1, the oxygen demand of microorganisms varies in different areas. That is, areas with higher activated sludge concentrations have a greater oxygen demand. However, the oxygen provided by aeration can only be provided in a fixed location, and the oxygen provided during aeration cannot be adjusted according to the concentration of activated sludge in different areas. This leads to a situation where some areas have excess oxygen and some areas have insufficient oxygen, resulting in a decrease in the activity of sludge microorganisms. Therefore, the following improvements are made:

[0072] Each aeration pipe 302 is fixedly fitted with a gear 304 in the middle. The top of the push plate 506 is provided with toothed grooves 507 at equal intervals. The gear 304 meshes with the toothed grooves 507 on the top of the push plate 506. The linear motion of the push plate 506 drives the gear 304 to rotate. The gear 304 drives the aeration pipe 302 to rotate, thereby realizing the rotation of the aeration pipe 302. This causes the orientation angle of the aeration holes distributed along the axial direction on the aeration pipe 302 to change.

[0073] Turbidity sensors are installed on both sides of the interior of bioreactor 1 to detect the concentration of activated sludge on both sides of bioreactor 1.

[0074] In use, the rotary motor 504 drives the pusher plate 506 to rotate, making the pusher plate 506 parallel to the guide rod 501. At this time, the turbidity sensors on both sides detect the distribution concentration of activated sludge in the biological reactor 1. When the concentration of activated sludge on one side is detected to be greater than that on the other side, the moving motor 508 is started to drive the screw 503 to rotate, so that the pusher plate 506 moves to the aeration pipe 302 close to the side with high concentration of activated sludge. Then, the electric push rod 505 extends to drive the pusher plate 506 to move upward, so that the tooth groove 507 on the top of the pusher plate 506 meshes with the gear 304 on that side. The moving motor 508 drives the screw 503 to rotate again, which drives the pusher plate 506 to move linearly through the slide 502, adjusting the angle of the aeration holes so that the aeration holes face the side with high concentration of activated sludge, thereby increasing the oxygen content on that side, effectively ensuring the activity of microorganisms, and improving the degradation efficiency of organic matter in wastewater. Therefore, this invention adaptively adjusts the aeration volume according to the concentration distribution of activated sludge by using the linkage between the propulsion component 5 and the aeration component 3.

[0075] Furthermore, as wastewater is discharged through membrane module 206, and the distance between each membrane module 206 is limited, sludge accumulates in the gaps between the membrane modules 206, and sludge and inorganic salt scaling also adhere to the outside of the membrane modules 206, thus causing clogging of the membrane modules 206. Therefore, the following improvements are made:

[0076] A liquid flow sensor is installed on the flange pipe 210. The liquid flow sensor is used to detect the liquid flow rate through the flange pipe 210, thereby determining the working status of the membrane module 206.

[0077] The bottom of the support plate 401 is provided with a U-shaped seat 405, which cooperates with the push plate 506.

[0078] During operation, when the liquid flow sensor detects that the wastewater flow through flange pipe 210 is less than the set threshold, it automatically determines that membrane module 206 is blocked. At this time, the priming pump is shut off to stop the wastewater discharge, the electric telescopic rod 402 is activated, and the electric telescopic rod 402 drives the movable plate 403 to reciprocate up and down, thereby realizing the reciprocating up and down of the isolation seat 404. Since the isolation seat 404 has an isosceles trapezoidal structure, and the inclined surfaces on both sides of the isolation seat 404 abut against the edges of the elastic seats 205 on both sides, the elastic seats 205 on both sides open and close, thereby intermittently increasing the bottom distance between the two adjacent membrane modules 206. At the same time, the rotary motor 504 drives the push plate 506 to rotate, making the push plate 506 perpendicular to the guide rod 501. Then, the electric push rod 505 drives the push plate 506 to rotate. The pusher plate 506 moves upward, positioning it within the U-shaped seat 405. Then, the moving motor 508 moves slightly forward and backward, causing the pusher plate 506 to reciprocate at high frequency in the horizontal direction. This reciprocates the U-shaped seat 405 and the support plate 401 along the slide rail 406, resulting in high-frequency reciprocating motion of the movable plate 403 and the isolation seat 404. This causes the elastic seat 205 and the membrane assembly 206 to vibrate at high frequency. The reciprocating lifting and lowering of the isolation seat 404 intermittently increases the bottom distance between the membrane assemblies 206, removing sludge adhering to the sides of the membrane assembly 206 and accumulating in the gaps between them. Therefore, this invention removes sludge and inorganic salt scale adhering to and accumulating on the sides of the membrane assembly 206 through the coordinated structure between the limiting component 4 and the propulsion component 5. Example 2

[0079] This embodiment provides a biological coupling treatment method for high-salt organic wastewater, the steps of which are as follows:

[0080] S1. High-salt organic wastewater is introduced into the pretreatment unit to remove large particulate impurities, suspended solids and some soluble organic matter from the wastewater, so as to reduce the load on the subsequent treatment unit.

[0081] S2. The pretreated wastewater is introduced into a salt-tolerant bacteria bioreactor, where salt-tolerant bacteria are used to initially degrade the organic matter in the wastewater, thereby reducing the organic load of the wastewater.

[0082] S3. The wastewater treated by the salt-tolerant bacteria bioreactor is introduced into the biofilm reactor. The aeration component 3 is started. The external air supply system provides oxygen to the microorganisms in the bioreactor 1 through the air collection pipe 301 and the aeration pipe 302. At the same time, the toothed groove 507 on the push plate 506 meshes with the gear 304 on the aeration pipe 302. By driving the push plate 506 to move linearly, the angle of the aeration pipe 302 is adjusted to improve the uniformity of aeration and enhance the gas-liquid mass transfer effect. Meanwhile, the microorganisms in the activated sludge come into contact with the organic matter in the wastewater to remove the organic matter in the wastewater.

[0083] S4. The flow propulsion component 5 drives the pusher plate 506 to reciprocate linearly and rotate, thus circulating the wastewater in the biological reactor 1 to prevent activated sludge from settling.

[0084] S5. Start the limit component 4, the electric telescopic rod 402 extends and retracts, driving the movable plate 403 to move up and down. The isolation seat 404 limits the elastic seat 205 to prevent the membrane module 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 modules 206 by raising and lowering.

[0085] S6. The wastewater after contact reaction with activated sludge is filtered and separated by membrane module 206. The filtered water enters manifold 204, then is collected into collection pipe 208 through diversion pipe 207, and finally discharged through collection pipe 209 and flange pipe 210.

[0086] S7. Introduce the biologically treated wastewater into the physicochemical treatment unit to further remove residual organic matter, heavy metal ions, color and other pollutants from the wastewater;

[0087] 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, and make the water quality meet the discharge standards or reuse requirements. Finally, the wastewater is post-treated to ensure that the effluent quality meets the final discharge or reuse standards.

[0088] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A biological coupling treatment device for high-salt organic wastewater, comprising a pretreatment unit, a biological treatment unit, a physicochemical treatment unit, a desalination unit, and a post-treatment unit, wherein the biological treatment unit comprises a halophilic bacteria bioreactor and a biofilm reactor, and the biofilm reactor comprises a bioreactor tank and an MBR membrane module, characterized in that, The bioreactor contains activated sludge, and the bottom of the MBR membrane module is equipped with an aeration component and a limiting component. The bottom of the bioreactor is equipped with a flow propulsion component. The MBR membrane module includes a frame, with a base frame and a top frame respectively located on the bottom and top sides of the frame. Two sets of manifolds are symmetrically arranged on both sides of the top frame, and two sets of elastic seats are symmetrically arranged on both sides of the base frame. A membrane module is arranged between the elastic seats and the manifolds. The aeration module includes an air collecting pipe, with two sets of aeration pipes symmetrically arranged on both sides of the air collecting pipe. A gear is fixedly sleeved in the middle of each aeration pipe. The limiting component includes a support plate, with an electric telescopic rod located in the middle of the top surface of the support plate. A movable plate is located at the top telescopic end of the electric telescopic rod, and two sets of isolation seats are symmetrically arranged on both sides of the top of the movable plate. The propulsion assembly includes a guide rod with a sliding seat slidably sleeved on it. A rotary motor is mounted on the top of the sliding seat, and an electric push rod is mounted on the output shaft of the rotary motor. A push plate is mounted on the top telescopic end of the electric push rod. The isolation seats are isosceles trapezoidal structures, with each isolation seat located between two adjacent elastic seats. The support plate is located in the middle of the bottom side of the frame, and slide rails are slidably connected to both ends of the support plate. The slide rails on both sides are fixedly connected to the inner sides of the frame. The slide rails allow the support plate to move slightly in the horizontal direction. A U-shaped seat is mounted at the bottom of the support plate, which cooperates with the push plate. The top of the push plate has evenly spaced toothed grooves. A screw is rotatably connected between the bottom inner walls of the bioreactor, and the slide is threaded onto 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. A guide rod is provided between the bottom inner walls of the bioreactor. The elastic seat and the manifold correspond one-to-one. The membrane module is connected to the manifold. A drainage pipe is fixedly connected to the top of the manifold, and a collecting pipe is fixedly connected to the end of the drainage pipe. The collecting pipe is fixedly connected to the top of the frame. A collection pipe is provided in the middle of the collecting pipe. The collection pipe is connected to the input port of an external water pump through a flange pipe. A liquid flow sensor is provided on the flange pipe. The aeration pipe is provided with aeration holes evenly distributed. The end of the aeration pipe away from the air collecting pipe is located on a pipe rack fixed to the bottom of the frame. The end of the air collecting pipe is provided with an air inlet pipe, which is connected to an external air supply system. Before the sludge and wastewater are separated, the lifting and lowering of the electric telescopic rod drives the lifting and lowering of the isolation seat through the movable plate, so as to adjust the distance between the membrane modules as needed, so that the aeration holes face the side with high concentration of activated sludge, and the aeration volume is adaptively adjusted according to the concentration distribution of activated sludge. When the liquid flow sensor detects that the amount of wastewater passing through the flange pipe is less than the set threshold, it causes the push plate to reciprocate at high frequency in the horizontal direction, and drives the U-shaped seat and the support plate to reciprocate at high frequency along the slide rail.

2. 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 as described in claim 1 to treat the high-salinity organic wastewater, characterized in that, Includes the following steps: S1. High-salt organic wastewater is introduced into the pretreatment unit to remove large particulate impurities, suspended solids and some soluble organic matter from the wastewater, so as to reduce the load on the subsequent treatment unit. S2. The pretreated wastewater is introduced into a salt-tolerant bacteria bioreactor, where salt-tolerant bacteria are used to initially degrade the organic matter in the wastewater, thereby reducing the organic load of the wastewater. S3. The wastewater treated by the salt-tolerant bacteria bioreactor is introduced into the biofilm reactor. The aeration components are started. The external air supply system provides oxygen to the microorganisms in the bioreactor through the air collection pipe and the aeration pipe. At the same time, the toothed groove on the push plate meshes with the gear on the aeration pipe. The push plate is driven to move linearly to adjust the angle of the aeration pipe, improve the uniformity of aeration, and enhance the gas-liquid mass transfer effect. Meanwhile, the microorganisms in the activated sludge come into contact with the organic matter in the wastewater to remove the organic matter in the wastewater. S4. The flow propulsion component is used to drive the push plate to reciprocate linearly and rotate to circulate the wastewater in the biological reactor, preventing the deposition of activated sludge. S5. Start the limit component, the electric telescopic rod extends and retracts, driving the movable plate to move up and down. The isolation seat limits the elastic seat to prevent the membrane module from being displaced and damaged under the impact of water flow. At the same time, the distance between the membrane modules is adjusted by raising and lowering the isolation seat. S6. The wastewater after contact reaction with activated sludge is filtered and separated from the sludge through the membrane module. The filtered water enters the manifold, then is collected into the collection pipe through the diversion pipe, and finally discharged through the collection pipe and flange pipe. S7. Introduce the biologically treated wastewater into the physicochemical treatment unit to further remove residual organic matter, heavy metal ions and color pollutants from 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, and make the water quality meet the discharge standards or reuse requirements. Finally, the wastewater is post-treated to ensure that the effluent quality meets the final discharge standards.

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