Membrane aeration bioreactor device for removing methyl tert-butyl ether pollution of underground water in high-salt environment

Abstract

The invention discloses a membrane aeration bioreactor device for removing methyl tert-butyl ether pollution in high-salinity underground water. Comprising an external methyl tert-butyl ether polluted underground water conveying device, a soil sample chamber, a CDI (capacitive deionization) material, a biological function chamber, a dissolved oxygen intelligent control system, a pH intelligent control system, a methyl tert-butyl ether degrading bacterium supply device, a filter material chamber and a purified underground water collection device which are connected in sequence. The underground water polluted by the methyl tert-butyl ether flows into the soil sample chamber through the conveying device, and the soil sample chamber is filled with the soil polluted by the methyl tert-butyl ether to simulate the site environment. Groundwater gradually penetrates through the CDI material through soil pores and enters the biological function chamber, in the CDI material, anions and cations in the underground water move towards electrodes at the two ends under the action of an electric field, a deionization area is formed in the middle to discharge water, and electron donors needed by microorganisms are provided while salinity is removed.

Description

Technical Field

[0001] This invention relates to the field of groundwater pollution remediation technology, and in particular to a membrane aeration bioreactor device using CDI materials and hollow fiber membranes. Background Technology

[0002] Methyl tert-butyl ether (MTBE) is widely used worldwide as an additive in unleaded gasoline. When MTBE leaks from pipelines in refineries, gas stations, and other areas, as well as during production and transportation, it can lead to groundwater pollution. MTBE is a carcinogen and a neurotoxic organic compound. Furthermore, MTBE pollution in groundwater is often accompanied by high salinity, causing devastating damage to habitats. Therefore, countermeasures must be taken to address MTBE pollution in groundwater.

[0003] Aerobic bioremediation is an environmentally friendly and effective method for removing methyl tert-butyl ether (MTBE) pollution from groundwater. Anoxic and oligotrophic groundwater environments inhibit the growth and metabolism of MTBE-degrading bacteria, and high salinity further affects the degradation efficiency. Aeration devices using hollow fiber membranes as the core component can provide oxygen in a bubble-free manner while avoiding disturbance that could cause MTBE to escape. Traditional bundled devices are prone to biofilm formation, leading to clogging and difficult cleaning, making them unsuitable for long-term operation. Bioreactive walls provide favorable redox potential and growth conditions, promoting local microbial activity; however, with the accumulation of biomass and mineral deposits, the permeability of the reactive wall decreases, thus inhibiting microbial activity.

[0004] Currently, groundwater methyl tert-butyl ether (MTBE) remediation technology has attracted much attention. However, existing bioremediation devices have not yet proposed effective solutions to the problems of microbial growth in high-salinity environments and low long-term effectiveness of aerobic bioremediation. There is an urgent need to develop a new type of membrane aeration bioreactor device to ensure the continuous and stable operation of aerobic bioremediation. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art and to provide a membrane aeration bioreactor device for removing methyl tert-butyl ether pollution from high-salinity groundwater.

[0006] This invention provides a membrane aeration bioreactor device for removing methyl tert-butyl ether (MTBE) contamination from groundwater. The hollow fiber membrane enables bubble-free aeration, and the tight sinusoidal corrugated structure on the surface of the hollow fiber membrane makes it less prone to clogging, resulting in strong anti-pollution capabilities. This enhances the device's stability while improving its ability to withstand water shock loads.

[0007] When groundwater migrates through the CDI material and is connected to an external power source, the ions in the water undergo directional migration under the influence of the electrodes, thereby forming a deionization zone in the middle of the CDI material. The salinity is greatly reduced, and the desalinated water can flow from the deionization zone into the membrane aerated bioreactor for the biodegradation of methyl tert-butyl ether. This technology forms recyclable salt crystal precipitates to avoid the inhibition of biological activity by high salinity conditions.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A membrane aerated bioreactor device for removing methyl tert-butyl ether (MTBE) contamination from high-salinity groundwater. It mainly comprises a soil sample chamber, a CDI material chamber, a biological function chamber, and a filter media chamber.

[0010] The main component of the biological functional chamber is a hollow fiber membrane. Bubble-free aeration prevents turbulence and allows methyl tert-butyl ether (MTBE) to escape while simultaneously providing oxygen. Equipped with dissolved oxygen and pH probes, it can adjust the groundwater environment within the reactor in real time and enhance the growth and metabolism of aerobic MTBE-degrading bacteria. This invention's membrane aerated bioreactor device can achieve long-term, efficient biodegradation of MTBE in high-salinity MTBE-contaminated groundwater, while significantly reducing groundwater salinity.

[0011] The biological functional chamber uses a perforated plate as the supporting material and is separated from the soil sample chamber and filter material chamber by CDI material and geotextile, respectively. The soil sample chamber is connected to a methyl tert-butyl ether contaminated groundwater conveyance device, with the inlet located at the top of the soil sample chamber.

[0012] The biological functional chamber is equipped with a dissolved oxygen regulation system, a pH regulation system, and a methyl tert-butyl ether degrading bacteria supply device. Its features include real-time regulation of growth conditions in the biological functional chamber, provision of methyl tert-butyl ether degrading bacteria with methyl tert-butyl ether degradation capabilities, and maintenance of a suitable working environment.

[0013] The filter media chamber is connected to the biological functional chamber at the end. The filter media chamber adsorbs residual pollutants and planktonic biomass, and the purified water is collected.

[0014] The membrane aeration bioreactor device of the present invention can effectively integrate CDI materials and hollow fiber membranes to remediate groundwater contaminated with high salinity methyl tert-butyl ether. It can give full play to the remediation role of aerobic degrading microorganisms in groundwater, while avoiding the decline in degradation capacity of methyl tert-butyl ether degrading bacteria caused by salinity stress, thus achieving long-term aerobic bioremediation.

[0015] Furthermore, the soil sample chamber is connected to the groundwater transport pipe. Contaminated groundwater enters the soil sample chamber through a liquid pump and then flows into the membrane aerated bioreactor device. The groundwater flow rate is controlled by a liquid flow meter, and with the help of valves, a pulsed inflow of groundwater can be achieved.

[0016] Furthermore, the CDI material is placed in close contact with the soil sample chamber. While possessing water permeability, the CDI material also blocks soil particles. An electric field is generated by applying electricity to the surface of the CDI material, and groundwater flows between the two electrodes. - SO4 2- Salinity ions such as Na undergo directional migration and are removed after passing through the adsorption material, reducing the salinity of the effluent to a range acceptable to microorganisms.

[0017] Furthermore, the perforated plate provides support and positioning for the CDI material, preventing displacement and inaccurate stress distribution. The perforated plate is made of stainless steel, and its internal pores allow water to flow out with virtually no resistance.

[0018] Furthermore, the biofunctional chamber is an important cavity for the biodegradation of methyl tert-butyl ether pollutants by microorganisms. It is mainly composed of a curtain-type hollow fiber membrane, which is characterized by structural stability, good biocompatibility, easy disassembly and assembly, and easy cleaning. The two ends of the biofunctional chamber are fixed by perforated plates to prevent the hollow fiber membrane structure from loosening and deforming.

[0019] Furthermore, the hollow fiber membrane is connected to an air pump to obtain external oxygen. Due to the influence of the membrane fiber pore size, oxygen enters the water in the form of microbubbles (diameter less than 3μm), resulting in high mass transfer efficiency. The microporous structure of the hollow fiber membrane, equipped with a gas control workstation, allows the introduced air to enter the groundwater in a bubble-free manner, increasing dissolved oxygen in the water while preventing the escape of volatile organic compounds from the groundwater, ensuring the oxygen required for aerobic methyl tert-butyl ether (MTBE) degrading bacteria to degrade MTBE pollutants. A dissolved oxygen probe is installed in the biological function chamber to monitor the dissolved oxygen concentration in real time. When the gas control workstation receives a signal that the dissolved oxygen level is below the set minimum limit, it automatically operates the air pump to aerate the hollow fiber membrane at a set gas flow rate without bubbles. The air pump stops once the dissolved oxygen concentration recovers to the set maximum limit, reducing energy loss caused by additional aeration.

[0020] Furthermore, a pH probe is installed in the biological function chamber to monitor the indoor pH value in real time. When the pH of the liquid in the biological function chamber is higher than the set maximum pH, it indicates that the liquid is too alkaline. The pH control workstation then activates the pump connected to the acidic conditioning solution to keep the pH of the liquid in the biological function chamber neutral. When the pH of the liquid in the biological function chamber is lower than the set minimum pH, it indicates that the liquid is too acidic. The pH control workstation then activates the pump connected to the alkaline conditioning solution to keep the pH of the liquid in the biological function chamber neutral.

[0021] Furthermore, the top of the biofunctional chamber is connected to a storage tank for methyl tert-butyl ether degrading bacteria, which is used to inoculate the hollow fiber membrane, ensuring the biomass of active functional bacteria in the biofunctional chamber and maintaining the continuous degradation of methyl tert-butyl ether pollutants.

[0022] Furthermore, the perforated plate at the end is tightly connected to the filter media chamber, which is wrapped with geotextile to prevent filter media escape. The filter media consists of coarse and fine sand in different proportions, designed to filter biological cells and soil microparticles from the effluent of the biological function chamber, further adsorbing pollutants in the groundwater after the biological function chamber has been remediated, ensuring the water quality purified by the membrane aerated bioreactor. Groundwater contaminated with methyl tert-butyl ether is ultimately purified through the membrane aerated bioreactor.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] 1. CDI materials are primarily based on physical adsorption, utilizing the electrostatic adsorption of ions in water by charged electrodes (typically porous carbon materials), without the need for phase change or high pressure. Energy consumption is mainly in the ion adsorption / desorption process itself, with relatively low auxiliary energy consumption compared to other processes.

[0025] 2. CDI materials have an electro-regeneration function. By short-circuiting the electrode or reversing the voltage polarity, adsorbed ions can be rapidly desorbed, achieving electrode regeneration. The process is simple and fast. The deionization process does not involve chemical regeneration, eliminating the complex regeneration steps of traditional ion exchange (backwashing, chemical dosing, slow washing, fast washing, etc.) and the associated equipment, reagent costs, and downtime.

[0026] 3. Hollow fiber membrane bioreactors, through their innovative design of bubble-free oxygen transfer and stratified biofilm metabolism, achieve ultra-high energy efficiency, excellent nitrogen removal performance, and green sustainability in wastewater treatment. Their modularity, low sludge production, and low maintenance make them a strategic technology choice for upgrading traditional processes and achieving carbon neutrality goals, particularly suitable for high ammonia nitrogen wastewater treatment, land-constrained projects, and decentralized wastewater treatment scenarios. With decreasing membrane material costs and process optimization, their application prospects will continue to expand. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of an explosion inside the device of the present invention;

[0029] Figure 3 This is a perspective view of the curtain-type hollow fiber membrane of the present invention;

[0030] Figure 4 This is a schematic diagram of the perforated plate of the present invention.

[0031] In the diagram: 1. Methyl tert-butyl ether (MTBE) contaminated groundwater transport device (containing MTBE contaminated groundwater); 2-1, First valve; 2-2, Second valve; 3-1, First pump; 3-2, Second pump; 3-3, Third pump; 3-4, Fourth pump; 4-1, First flow meter; 4-2, Second flow meter; 5. Soil sample chamber (containing MTBE contaminated soil); 6. CDI material; 7-1, 7-2, Porous plate; 8. Dissolving agent. 9. Oxygen probe; 10. Curtain-type hollow fiber membrane; 11. Electrode; 12. Dissolved oxygen intelligent control system; 13. Air pump; 14. Methyl tert-butyl ether degrading bacteria supply device; 15. pH probe; 16. pH control liquid tank; 17-1. First geotextile; 17-2. First geotextile; 17-1. Filter media; 18. Groundwater purification and collection device; 29. ​​Hollow fiber membrane filaments; 20. Hollow fiber membrane frame; 21. Plate pores. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Embodiment 1: See Figures 1-4 A membrane aerated bioreactor device for removing methyl tert-butyl ether (MTBE) contamination from groundwater in high-salinity environments is described. The device comprises, in sequence, an MTBE-contaminated groundwater transport device, a soil sample chamber, a CDI (capacitive deionization) material, a biological function chamber, a dissolved oxygen intelligent control system, a pH intelligent control system, an MTBE-degrading bacteria supply device, a filter media chamber, and a purified groundwater collection device. The purified groundwater collection device is located at the end of the membrane aerated bioreactor device. The purified water collection pipe interface is located above the filter media chamber, and the liquid flows directly into a light-proof purified water storage tank along with the groundwater flow. The MTBE-contaminated groundwater transport device includes a light-proof sealed tank for storing the MTBE-contaminated groundwater. The transport pipe is equipped with a first valve 2-1, a first liquid pump 3-1, and a flow meter 4-1. The flow meter is used to regulate the groundwater flow rate. The interface between the transport pipe and the soil sample chamber is located at the bottom of the soil sample chamber, and the interface is covered with an airtight rubber seal.

[0033] The soil sample chamber is filled with soil contaminated with methyl tert-butyl ether. The soil must be kept in a saturated water state during the operation of the device. The soil sample chamber and the biological function chamber are separated by CDI material 6 and the first perforated plate 7-1.

[0034] Among them, CDI material 6 includes carbon electrode material and adsorbent material, which can be permeable to water while preventing soil particles from entering the biological functional chamber. The perforated plate mainly serves as local support and chamber positioning. In addition, the CDI material can be replaced with a new type of CDI material with better biocompatibility, higher adsorption capacity, better stability, and higher water permeability.

[0035] The biological functional chamber is composed of curtain-type hollow fiber membrane modules arranged in a wave pattern. The membrane fibers in the membrane modules are of uniform thickness and are positioned by slots. It provides dissolved oxygen in a bubble-free manner while avoiding the escape of volatile organic compounds. The top of the biological functional chamber is equipped with a dissolved oxygen intelligent control system 11, a pH intelligent control system 16, and a methyl tert-butyl ether degrading bacteria supply device. The two ends of the biological functional chamber are locally supported and positioned by the first perforated plate 7-1 and the second perforated plate 7-2.

[0036] The bottom and sides of the biofunctional chamber are pre-set with slots to facilitate the installation and removal of the curtain-type hollow fiber membrane.

[0037] 7. A membrane aeration bioreactor device for removing methyl tert-butyl ether pollution from groundwater in a high-salt environment, as described in claim 3, is characterized in that: the dissolved oxygen regulation system uses an air pump 12 and a gas pipeline to aerate the curtain-type hollow fiber membrane, and a gas regulation workstation 11 is equipped on the gas pipeline. The air pump power is adjusted using the monitoring data transmitted in real time by the dissolved oxygen probe 8 set in the center of the biological function chamber, so as to provide an aerobic environment.

[0038] 8. A membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salt environments according to claim 3, characterized in that: the pH intelligent control system has two light-proof sealed tanks containing acidic and alkaline control solutions, respectively controlled by two independent liquid pumps, namely the third liquid pump 3-3 and the fourth liquid pump 3-4; a pH control workstation 15 is equipped on the control solution pipeline; and the power of the two liquid pumps is controlled by real-time monitoring data transmitted by the pH probe 14 set in the center of the biological function chamber, so as to provide neutral environmental conditions.

[0039] The storage tank 13 for methyl tert-butyl ether degrading bacteria maintains the microbial degradation activity for replenishment of the bacterial agent. The replenishment pipeline for methyl tert-butyl ether degrading bacteria is equipped with a second valve 2-2 and a second liquid pump 3-2, which is used to control the replenishment amount of methyl tert-butyl ether degrading bacteria. The filter media chamber is filled with a mixture of coarse and fine sand. The filter media chamber is wrapped with geotextile 17-1 to prevent the filter media from entering the biofunctional chamber and interfering with bioremediation.

[0040] like Figure 1 and Figure 2 As shown, this embodiment provides a membrane aerated bioreactor device for removing methyl tert-butyl ether (MTBE) contamination from high-salinity groundwater. MTDBE-contaminated soil and groundwater from the contaminated site are retrieved and placed into containers 1 and 5 of the device, respectively. Microorganisms are domesticated using the retrieved MTBE-contaminated groundwater to obtain aerobic MTBE-degrading bacteria capable of efficiently degrading the target MTBE in the water. These bacteria are then further cultured on a large scale, and the resulting bacterial solution is transferred to the MTBE-degrading bacteria storage tank 5.

[0041] Open valve 2-2 and run liquid pump 3-2 to introduce the fermentation broth into the biological functional chamber. The dissolved oxygen concentration obtained through dissolved oxygen probe 8 is fed back to gas control workstation 11 to run gas pump 12 to increase the dissolved oxygen concentration in the groundwater. The pH value obtained through pH probe 15 is fed back to pH control workstation 17 to run liquid pump 3-3 or 3-4 to adjust the pH of the biological functional chamber to neutral. After 48-72 hours of cultivation, the methyl tert-butyl ether degrading bacteria successfully colonized.

[0042] Open valve 2-1 and run liquid pump 3-1 to allow the methyl tert-butyl ether contaminated groundwater to flow into the soil sample chamber from the bottom. Control the groundwater flow rate to 0.015 m / min using flow meter 4-1 and continue to supply water for more than 40 minutes to ensure that the soil in the soil sample chamber is saturated with water.

[0043] When groundwater contaminated with methyl tert-butyl ether (MTBE) enters the soil sample chamber and comes into contact with MTBE-contaminated soil, some hydrophobic pollutants are trapped by the soil, increasing the pollutant concentration in the soil. By applying an electric current to the CDI material 6 using electrode 10, groundwater permeates through the CDI material 6 under flow field pressure (0.1 bar). Influenced by the electrode, the carbon electrode material generates electricity, creating an electric field. Under electrochemical action, this induces hydrophobic pollutants to migrate from the soil to the liquid phase and into the bioremediation chamber, accelerating the release rate of pollutants from the soil, increasing the bioaccessibility of MTBE pollutants in the soil-groundwater phase, and promoting the bioremediation of MTBE-contaminated groundwater.

[0044] Methyl tert-butyl ether contaminates groundwater containing sodium + Cu 2+ Mg 2+ Cl - SO4 2- Plasma, with a conductivity of 1561 μS·cm -1 The hardness was 196 mg / L, which was not conducive to the growth and metabolism of methyl tert-butyl ether degrading bacteria. The electric field of CDI material 6 caused the cations and anions to migrate in a directional manner and be adsorbed by the adsorbent material. The total removal rate of conductivity in groundwater reached 91.6%, and the removal rate of hardness reached 86.7%.

[0045] Methyl tert-butyl ether contaminated groundwater enters the biological functional chamber through CDI material 6 and the perforated plate. The pH of the Methyl tert-butyl ether contaminated groundwater is 9.7, which is slightly alkaline. It is necessary to run the liquid pump 3-4 at a rate of 0.05 ml / min. -1 Continuously supply alkaline conditioning solution to the biological functional chamber to maintain the pH at around 6.8-7.1.

[0046] The dissolved oxygen in contaminated groundwater is usually below 2 mg / L, which is relatively hypoxic. Under the control of the dissolved oxygen intelligent control system 11, the air pump 12 is turned on to pump air into the hollow fiber membrane 9 device, which replenishes the dissolved oxygen concentration in the groundwater in a bubble-free manner, so that the dissolved oxygen concentration in the biological function chamber is maintained at a level of 2 to 4 mg / L, providing sufficient oxygen for aerobic microorganisms.

[0047] Add methyl tert-butyl ether degrading bacteria agent by opening valve 2-2 in batches, once every 10 days. Take samples from the inlet of the biological functional chamber and count the microorganisms under a microscope; the number should be greater than 1 × 10⁻⁶. 8 Reduce the dosing frequency when the microbial count is less than 1×10⁶ cells / mL. 6 Increasing the dosage frequency when the number of cells / mL is reduced, and the device still maintains good biological activity after 120 days of continuous operation, indicates that the device has good long-term degradation performance for methyl tert-butyl ether pollutants.

[0048] After bioremediation in the biological functional chamber, groundwater contaminated with methyl tert-butyl ether (MTBE) passes through the perforated plate 7-2 and geotextile 17-2 into the filter media chamber. The main function of the filter media chamber is to adsorb residual MTBE contaminants flowing out of the biological functional chamber and filter biological cells. The filtered groundwater then enters the purification tank through pipes. With an MTBE concentration of 85.1 mg / L, the total MTBE removal rate of the contaminated groundwater passing through this membrane aerated bioreactor device is as high as 85.4%-96.3%.

[0049] Example 2

[0050] Groundwater near a gas station was contaminated with methyl tert-butyl ether (MTBE). The MTBE concentration was 75.40 mg / L, and the conductivity was 1131 μS·cm. -1 It has a hardness of 186 mg / L and a pH value of 7.5–7.6.

[0051] After 30 days of application of the membrane aerated bioreactor device for removing methyl tert-butyl ether (MTBE) contamination from groundwater at a gas station site, the conductivity decreased by 85.6% and the hardness decreased by 96.52%. The MTBE concentration decreased from an initial 75.4 ± 3.54 mg / L to 1.81 ± 0.93 mg / L, demonstrating the enhanced bioremediation efficacy of this invention for MTBE-contaminated groundwater under high salinity conditions.

[0052] The specific embodiments shown above provide a detailed description of how the present invention solves the problems existing in the prior art, proposes solutions, and demonstrates its effectiveness. The above descriptions are merely specific embodiments of the present invention and should be understood as including any modifications, equivalent substitutions, and improvements made in accordance with the spirit of the invention within the scope of protection of the present invention.

Claims

1. A membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments, characterized in that: The system includes, in sequence, a groundwater transport device for methyl tert-butyl ether contaminated water, a soil sample chamber, a CDI (capacitive deionization) material, a biological function chamber, a dissolved oxygen intelligent control system, a pH intelligent control system, a methyl tert-butyl ether degrading bacteria supply device, a filter media chamber, and a purified groundwater collection device. The purified groundwater collection device is located at the end of the membrane aerated bioreactor device, and the purified water collection pipe interface is located above the filter media chamber. The liquid flows directly into the light-proof purified water storage tank along with the groundwater flow.

2. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The groundwater transport device for methyl tert-butyl ether contaminated with groundwater includes a light-proof sealed tank for storing the groundwater contaminated with methyl tert-butyl ether. The transport pipeline is equipped with a first valve, a first liquid pump, and a flow meter. The flow meter is used to regulate the flow rate of the groundwater. The interface between the transport pipeline and the soil sample chamber is located at the bottom of the soil sample chamber, and the interface is equipped with an airtight rubber wrap.

3. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The soil sample chamber is filled with soil contaminated with methyl tert-butyl ether. The soil must be kept in a saturated water state during device operation. The soil sample chamber and the biological function chamber are separated by CDI material and a first perforated plate.

4. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 3, characterized in that: CDI materials include carbon electrode materials and adsorbent materials. While being permeable to water, they prevent soil particles from entering the biological functional chamber. The perforated plate mainly serves as a local support and chamber positioning tool.

5. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The biological functional chamber is composed of curtain-type hollow fiber membrane modules arranged in a wave pattern. The membrane fibers in the membrane modules are of uniform thickness and are positioned by slots. It provides dissolved oxygen in a bubble-free manner while preventing the escape of volatile organic compounds. The top of the biological functional chamber is equipped with a dissolved oxygen intelligent control system, a pH intelligent control system, and a methyl tert-butyl ether degrading bacteria supply device. The two ends of the biological functional chamber are locally supported and positioned by a first perforated plate and a second perforated plate.

6. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The bottom and sides of the biological functional chamber are pre-set with slots to facilitate the installation and removal of the curtain-type hollow fiber membrane.

7. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The dissolved oxygen control system uses an air pump and gas pipeline to aerate the curtain-type hollow fiber membrane. The gas pipeline is equipped with a gas control workstation, which uses real-time monitoring data transmitted by a dissolved oxygen probe set in the center of the biological function chamber to control the power of the air pump and provide an aerobic environment.

8. The membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments according to claim 1, characterized in that: The pH intelligent control system has two light-proof sealed tanks containing acidic and alkaline conditioning solutions. The flow rate of the conditioning solutions is controlled by two independent pumps, namely the third and fourth pumps. A pH control workstation is equipped on the conditioning solution pipeline. The power of the two pumps is controlled by real-time monitoring data transmitted by a pH probe set in the center of the biological function room to provide neutral environmental conditions.

9. A membrane aerated bioreactor device for removing methyl tert-butyl ether contamination from groundwater in high-salinity environments, as described in claim 1, is characterized in that: The storage tank for methyl tert-butyl ether degrading bacteria maintains the microbial degradation activity in preparation for bacterial agent replenishment. The methyl tert-butyl ether degrading bacteria replenishment pipeline is equipped with a second valve and a second liquid pump. The second liquid pump is used to control the replenishment amount of methyl tert-butyl ether degrading bacteria. The filter media chamber is filled with a mixture of coarse and fine sand. The filter media chamber is wrapped with geotextile to prevent the filter media from entering the biofunctional chamber and interfering with bioremediation.

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