Photovoltaic ecological floating island, in-situ water deep purification system and method

Abstract

This invention discloses a photovoltaic ecological floating island, an in-situ deep water purification system, and a method in the field of environmental protection technology. The photovoltaic ecological floating island includes an ice-breaking plate and a float. A hydroponic tank is opened on the top of the float. A servo motor and a drainage and heat dissipation shell are fixed to the bottom of the ice-breaking plate. The output end of the servo motor is connected to a drive gear. A first driven gear meshes with one side of the drive gear. An ice-breaking blade is welded to the top of the first driven gear through a first rotating shaft. A heating coil is connected inside the ice-breaking blade. The heating coil is used to heat the ice-breaking blade after power is turned on. By setting up the ice-breaking blade and the drainage and heat dissipation shell, this invention can heat and thaw the ice surface of the photovoltaic ecological floating island, facilitating rapid movement and maintenance of the photovoltaic ecological floating island. By setting up an oxygen-based microbial membrane component, it can achieve the oxidative degradation of ammonia nitrogen and easily degradable COD, realizing the deep purification of COD and nitrogen pollutants in the water.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, specifically to photovoltaic ecological floating islands, in-situ deep water purification systems and methods. Background Technology

[0002] The problem of water pollution, exemplified by black and odorous water bodies, is notoriously difficult to eradicate. These bodies contain high levels of chemical oxygen demand (COD) and nitrogenous pollutants, some of which are difficult to eliminate through natural degradation. They not only emit foul odors, impacting urban landscapes and residents' quality of life, but also seriously threaten ecological security and human health. Therefore, achieving the synergistic and in-depth removal of COD and nitrogenous pollutants from water bodies has become a critical technical challenge urgently needing to be addressed in the field of water environment management.

[0003] Currently, water treatment mainly uses aeration and reoxygenation technology, but this technology has the following shortcomings:

[0004] (1) Traditional aeration systems have low oxygen utilization rates, resulting in a large waste of energy and high operating costs;

[0005] (2) It has limited effect on removing recalcitrant organic matter and cannot achieve deep water purification;

[0006] (3) Nitrate, a product of ammonia nitrogen oxidation, accumulates in water bodies, causing secondary eutrophication. Although membrane aeration technology improves oxygen utilization efficiency through selective oxygen permeation of hollow fiber membranes, it still cannot effectively solve the problem of synergistic removal of recalcitrant organic matter and nitrogen pollutants, resulting in incomplete water purification and poor water quality stability after treatment.

[0007] Studies have shown that hydrogen, as a highly efficient electron donor, can promote denitrification, reducing nitrate to nitrogen and assisting in the degradation of some recalcitrant organic matter. However, the application of either oxygen-based or hydrogen-based microbial membrane technologies alone has limitations: while oxygen-based microbial membranes can effectively degrade readily degradable organic matter and ammonia nitrogen, they produce intermediate products such as nitrate; while hydrogen-based microbial membranes can reduce nitrate and some recalcitrant organic matter, their ability to degrade initial organic matter is weak. How to organically combine these two technologies to achieve efficient and synergistic removal of COD and nitrogenous pollutants in water bodies is a key technical challenge that urgently needs to be overcome in this field.

[0008] Furthermore, the pollutants in black and odorous water bodies are complex and their concentrations fluctuate greatly, necessitating the establishment of an intelligent control system to achieve on-demand supply of oxygen and hydrogen. Meanwhile, traditional water treatment methods often employ off-site treatment, which is not only large-scale and energy-intensive but may also cause secondary disturbances to the aquatic ecosystem. In addition, traditional gas production relies on external supply, increasing system complexity, operating costs, and safety risks. Since purification systems often depend on the purification effect of plants on floating islands, in cold climates, the floating islands are easily frozen after the water surface freezes, making them difficult to move and maintain. Summary of the Invention

[0009] The purpose of this invention is to provide a photovoltaic ecological floating island, an in-situ deep water purification system and method. By setting up an ice-breaking blade and a drainage and heat dissipation shell, the ice surface of the photovoltaic ecological floating island can be heated and thawed, facilitating rapid movement and maintenance of the photovoltaic ecological floating island, reducing the wear and tear on water purification facilities. The oxygen-based microbial membrane module realizes the oxidative degradation of ammonia nitrogen and easily degradable COD, and the hydrogen-based microbial membrane module reduces the ammonia nitrogen oxidation product nitrate into nitrogen gas, while further reducing and removing the recalcitrant COD. This achieves deep removal of COD and nitrogen pollutants in the water, and has the advantages of high pollutant removal efficiency and no secondary pollution compared with traditional aeration.

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] In a first aspect, a photovoltaic ecological floating island is provided, comprising an ice-breaking plate and a floating body. A hydroponic tank is provided on the top of the floating body. A servo motor and a drainage and heat dissipation shell are fixed to the bottom of the ice-breaking plate. The output end of the servo motor is connected to a drive gear. A first driven gear meshes with one side of the drive gear. An ice-breaking blade is welded to the top of the first driven gear through a through-hole first rotating shaft. A heating coil is connected inside the ice-breaking blade. The heating coil is used to heat the ice-breaking blade after power is turned on. Multiple heat sinks are welded to the outer wall of the drainage and heat dissipation shell. A water quality sensor group is connected to the bottom of the drainage and heat dissipation shell. A photovoltaic panel is fixed to one end of the floating body through a support frame. The photovoltaic panel collects light energy and outputs electrical energy as a photovoltaic power source. A central processing unit is integrated inside the support frame. The power input end of the central processing unit is connected to the photovoltaic power source. The input end of the central processing unit is connected to the water quality sensor group. The first output end of the central processing unit is connected to the heating coil through an infrared photoelectric switch. The second output end of the central processing unit is connected to a wireless communication module. The third output end of the central processing unit is connected to the input end of the servo motor.

[0012] As a further aspect of the present invention: a second driven gear meshes with one side of the drive gear, a second rotating shaft passes through the interior of the second driven gear, an electric telescopic rod is fixed to the top of the second rotating shaft, the input end of the electric telescopic rod is connected to the fourth output end of the central processing unit, an L-shaped lifting rod is connected through the top of the electric telescopic rod, a fishing net is connected to the lower end of the L-shaped lifting rod, and a hanging plate is fixed to the bottom end of the fishing net.

[0013] As a further aspect of the present invention: the hydroponic trough is arranged in a linear array, and a number of plant support blocks are welded to the inner wall of the hydroponic trough.

[0014] As a further aspect of the present invention: the drainage and heat dissipation shell is a hollow hemispherical shell, and the water quality sensor group includes a pH sensor, an ammonia nitrogen sensor, a temperature sensor, and a turbidity sensor.

[0015] As a further aspect of the present invention: the top of the float is provided with multiple through holes, and the bottom of the float is welded with a threaded connecting ring coaxial with the corresponding through holes. The bottom of the threaded connecting ring is threadedly connected to a microbial attachment tube, which includes a hollow sealed cylindrical tube with multiple holes on the outer wall, and the interior of the microbial attachment tube is filled with zeolite.

[0016] Secondly, this invention provides an in-situ deep water purification system. The system includes a water electrolysis and simultaneous hydrogen and oxygen production reactor and a microbial membrane module. The microbial membrane module includes an oxygen-based microbial membrane module and a hydrogen-based microbial membrane module. The water electrolysis and simultaneous hydrogen and oxygen production reactor is used to generate oxygen and hydrogen. The reactor includes an electrolysis hydrogen production device that generates hydrogen and oxygen through water electrolysis. The microbial membrane module uses an internal carrier membrane as a physical barrier to trap suspended solids, colloids, bacteria, some viruses, and large organic molecules in the upstream water, achieving a high degree of solid-liquid separation. This results in low suspended solids content and low turbidity in the treated effluent, which is beneficial for water clarity and stability. The water electrolysis and simultaneous hydrogen and oxygen production reactor includes an oxygen output end and a hydrogen output end. The oxygen output end is used to discharge the electrolyzed water... The oxygen generated by the simultaneous hydrogen production and oxygen generation reactor is transported to the oxygen-based microbial membrane module, while the hydrogen output terminal is used to transport the hydrogen generated by the simultaneous hydrogen production and oxygen generation reactor of water electrolysis to the hydrogen-based microbial membrane module. The oxygen-based microbial membrane module and the hydrogen-based microbial membrane module utilize the oxygen and hydrogen generated by the simultaneous hydrogen production and oxygen generation reactor of water electrolysis as electron acceptors and donors, respectively, to promote the growth and metabolism of corresponding microorganisms. These microorganisms can degrade recalcitrant organic matter, improve the degradation efficiency of organic matter, and thus make up for the shortcomings of traditional microbial membrane modules in treating recalcitrant organic matter. Through the synergistic effect of the oxygen-based microbial membrane module and the hydrogen-based microbial membrane module, deep purification of water can be achieved, the quality of effluent can be improved, and more stringent water quality requirements can be met. The simultaneous hydrogen production and oxygen generation reactor of water electrolysis includes an oxygen output terminal and a hydrogen output terminal.

[0017] The oxygen output end is connected to the oxygen-based microbial membrane module through an oxygen supply valve, and the hydrogen output end is connected to the hydrogen-based microbial membrane module through a hydrogen supply valve. By ensuring a stable supply of oxygen and hydrogen, oxygen and hydrogen can be delivered to the corresponding microbial membrane modules, further promoting the growth and metabolic activities of microorganisms. Through this precise air supply method, the system can fully utilize the degradation capabilities of oxygen-based and hydrogen-based microorganisms to deeply treat recalcitrant organic matter, thereby effectively improving the water purification effect and enhancing the system's stability and reliability. This provides a strong guarantee for deep water purification. The four corners of the oxygen-based and hydrogen-based microbial membrane modules are fixed with photovoltaic ecological floating islands as described above. The interior of the photovoltaic ecological floating island has a layered carrier structure, including a surface aerobic carrier zone and a bottom anaerobic carrier zone. The surface aerobic carrier zone is connected to the oxygen-based microbial membrane module through a connecting pipe. By directly connecting the microbial carriers in the floating island with the membrane module, a unified biological treatment network is formed. Traditional membrane modules are prone to problems with unstable microbial communities, but through the connecting pipe system, the floating island carrier zone becomes a microbial reservoir for the membrane module, which can be quickly replenished and repaired when the microorganisms in the membrane are impacted. Meanwhile, the photovoltaic ecological floating islands not only provide a platform for microorganisms to attach and grow, but also enhance the ecological effects of the system. Specific aquatic plants can be grown on these floating islands, absorbing nutrients such as nitrogen and phosphorus from the water, further purifying the water. The photovoltaic panels provide partial shading, suitable for the growth of certain shade-tolerant aquatic plants, and the generated electricity is used in the electrolysis-hydrogen-oxygenation reactor, reducing system energy consumption. Furthermore, the photovoltaic ecological floating islands provide habitats for aquatic organisms, increasing biodiversity and forming a more stable and healthy ecosystem. Through the organic combination of photovoltaic ecological floating islands and microbial membrane components, this system can achieve deep removal of recalcitrant organic matter, significantly improving water purification. The signal input terminals of the electrolysis-hydrogen-oxygenation reactor, oxygen supply valve, and hydrogen supply valve are all connected to the signal output terminal of the control unit. The signal input terminal of the control unit is connected to the pollutant detection unit, which collects COD and nitrogen concentration signals in the river and sends these signals to the signal input terminal of the control unit. The control unit adjusts the hydrogen and oxygen supply pressure of the electrolysis-hydrogen-oxygenation reactor based on the received COD and nitrogen concentration signals.

[0018] As a further aspect of the present invention: a plurality of oxygen-based microbial membrane components are provided, the plurality of oxygen-based microbial membrane components are parallel to each other, and the oxygen-based microbial membrane components include a first carrier membrane.

[0019] As a further aspect of the present invention: the hydrogen-based microbial membrane assembly includes a second carrier membrane, and the hydrogen-based microbial membrane assembly is parallel to the oxygen-based microbial membrane assembly.

[0020] As a further aspect of the present invention: both the first carrier membrane and the second carrier membrane are non-porous hollow fiber membranes.

[0021] As a further aspect of the present invention: the non-porous hollow fiber membrane is a polyethylene non-porous hollow fiber membrane.

[0022] As a further aspect of the present invention: the non-porous hollow fiber membrane is a polypropylene non-porous hollow fiber membrane.

[0023] As a further aspect of the present invention: both the oxygen-based microbial membrane component and the hydrogen-based microbial membrane component are strip-shaped like rugby balls, and several of the oxygen-based microbial membrane components or hydrogen-based microbial membrane components are combined to form a square or circular assembly, and the oxygen-based microbial membrane component and / or hydrogen-based microbial membrane component float on the surface of the river and are perpendicular to the riverbank.

[0024] As a further aspect of the present invention: several of the oxygen-based or hydrogen-based microbial membrane components are connected end to end to form a circular assembly.

[0025] As a further aspect of the present invention, the interval between the oxygen-based microbial membrane module and the hydrogen-based microbial membrane module is 2m-10m.

[0026] As a further aspect of the present invention: the photovoltaic ecological floating island includes a floating frame and a central carrier chamber. The floating frame is made of polyethylene, which has excellent weather resistance and UV resistance. The interior of the floating frame is filled with closed-cell expanded polystyrene to ensure long-term buoyancy stability. The central carrier chamber has a cylindrical structure and is equipped with a waterproof and breathable membrane. The waterproof and breathable membrane divides the interior of the central carrier chamber into a first layer and a second layer arranged from top to bottom. The first layer is the surface aerobic carrier area, and the second layer is the anaerobic carrier area.

[0027] As a further aspect of the present invention: the interior of the surface aerobic carrier region is filled with a porous ceramic carrier, which is used to maintain a dissolved oxygen concentration of 2-6 mg / L. This carrier has a high specific surface area and good biocompatibility, which is conducive to the attachment and growth of aerobic microorganisms. The porous ceramic carrier is connected to the oxygen-containing microbial membrane component through a first connecting pipe, and oxygen is continuously supplied to this region using a microporous aerator to provide a suitable growth environment for aerobic microorganisms.

[0028] As a further aspect of the present invention: the interior of the bottom anaerobic carrier zone is filled with a biochar carrier, which is used to maintain a dissolved oxygen concentration of 0.1-0.5 mg / L. The biochar carrier not only has a high specific surface area, but can also adsorb organic matter in the water, providing a rich substrate for anaerobic microorganisms. This zone, through its sealed design and oxygen-consuming agent, creates a suitable growth environment for anaerobic microorganisms.

[0029] Thirdly, a method is also provided, which is applied to the in-situ deep water purification system as described above, the method comprising the following steps:

[0030] S1: Start the electrolysis water simultaneous hydrogen and oxygen production reactor, and carry out the biofilm formation of the oxygen-based microbial membrane module under oxygen supply pressure conditions, with a hydrogen pressure of 2psi to 6psi and a biofilm formation time of 6d to 12d; carry out the biofilm formation of the hydrogen-based microbial membrane module under hydrogen supply pressure conditions, with a hydrogen pressure of 4psi to 10psi and a biofilm formation time of 4d to 8d, to obtain the oxygen-based microbial membrane module and the hydrogen-based microbial membrane module with completed biofilm formation;

[0031] S2: Operate the electrolysis water synchronous hydrogen and oxygen production reactor, so that pollutants in the upstream water body enter the oxygen-based microbial membrane module and are oxidized and degraded to obtain degraded upstream water body; further, the upstream water body enters the hydrogen-based microbial membrane module, so that the residual oxides in the upstream water body are reduced and removed, realizing in-situ deep purification of COD and nitrogen pollutants.

[0032] S3: Control the dissolved oxygen concentration in the aerobic carrier zone on the surface of the photovoltaic ecological floating island to be 2-6 mg / L, and the dissolved oxygen concentration in the anaerobic carrier zone at the bottom to be 0.1-0.5 mg / L;

[0033] S4: The pollutant detection unit collects the concentration signals of COD and nitrogen pollutants in real time and sends the concentration signals of COD and nitrogen pollutants to the control unit. The control unit adjusts the oxygen and / or hydrogen pressure by supplying oxygen and / or hydrogen to the oxygen supply valve and / or hydrogen supply valve.

[0034] As a further aspect of the present invention: by adjusting the oxygen and / or hydrogen pressure to the oxygen supply valve and / or hydrogen supply valve, the metabolic rate of oxygen-based microorganisms is dynamically matched with that of hydrogen-based microorganisms, thereby achieving stable operation of the entire system under high removal efficiency.

[0035] As a further aspect of the present invention: the electrolysis water simultaneous hydrogen and oxygen production reactor is operated in an intermittent mode, with an operation / stop time of 2h to 8h.

[0036] As a further aspect of the present invention: in step S1, the oxygen supply pressure is 3 psi and the biofilm formation time is 9 days.

[0037] As a further aspect of the present invention: in step S1, the hydrogen supply pressure is 7 psi and the biofilm formation time is 6 days.

[0038] As a further aspect of the present invention, the pollutants include COD and nitrogen pollutants.

[0039] As a further aspect of the present invention: in step S1, the operation / stop time of the water electrolysis simultaneous hydrogen and oxygen production reactor is 8 hours.

[0040] As a further aspect of the present invention: in step S2, the pollutant concentration is 20 mg / L-150 mg / L.

[0041] As a further aspect of the present invention: in step S2, the operation / stop time of the water electrolysis simultaneous hydrogen and oxygen production reactor is 5 hours.

[0042] As a further aspect of the present invention: in step S3, the dissolved oxygen concentration in the aerobic carrier zone on the surface of the photovoltaic ecological floating island is controlled at 4 mg / L, and the dissolved oxygen concentration in the anaerobic carrier zone at the bottom is controlled at 0.3 mg / L.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] 1. In this invention, the oxidation and degradation of ammonia nitrogen and readily degradable COD are achieved through an oxygen-based microbial membrane module, and the reduction of nitrate, a product of ammonia nitrogen oxidation, into nitrogen gas through a hydrogen-based microbial membrane module. At the same time, the recalcitrant COD is further reduced and removed, thus achieving deep removal of COD and nitrogenous pollutants in water. The oxygen utilization rate is high, which is beneficial for saving energy and reducing water treatment costs. Compared with traditional aeration, it has the advantages of high pollutant removal efficiency and no secondary pollution. Hydrogen and oxygen are generated simultaneously through water electrolysis and supplied to the microbial membrane module. Ammonia nitrogen and readily degradable COD in the water are first oxidized and degraded, and then the nitrate, a product of ammonia nitrogen oxidation, is reduced into nitrogen gas. The recalcitrant COD is further reduced and removed, thereby achieving deep removal of COD and nitrogenous pollutants in water.

[0045] 2. In this invention, by real-time detection of COD and nitrogen pollutant concentrations and dynamic adjustment of oxygen and hydrogen pressure based on real-time feedback data, the metabolic rates of oxygen-based microorganisms and hydrogen-based microorganisms are dynamically matched, thereby achieving stable operation of the entire system under high removal efficiency. It has the advantages of simple operation and high degree of automation.

[0046] 3. In this invention, hydrogen produced by water electrolysis is used as the hydrogen source for the hydrogen-based microbial membrane module, and oxygen, a byproduct of water electrolysis, is used as the hydrogen source for the oxygen-based microbial membrane module, thus achieving efficient resource utilization. At the same time, this invention uses membrane aeration to supply oxygen and hydrogen, and the gas supply mode is intermittent. Compared with traditional aeration, it has advantages such as high gas utilization rate and low gas supply, which not only saves operating costs but is also safer and more reliable.

[0047] 4. In this invention, by utilizing a layered, interconnected photovoltaic ecological floating island to fix the biofilm module, not only can the biofilm module be prevented from drifting with the water flow, but it also has a certain purification effect on the water. By directly connecting the microbial carriers within the floating island to the membrane module, a unified biological treatment network is formed. The floating island carrier area becomes a "microbial reservoir" for the membrane module, which can quickly replenish and repair itself when the microorganisms within the membrane are impacted. At the same time, the photovoltaic panels provide partial shading, suitable for the growth of certain shade-tolerant aquatic plants, and the electricity generated is used in the electrolysis of water to simultaneously produce hydrogen and oxygen, reducing the system's energy consumption. On the other hand, by adjusting the placement spacing between the oxygen-based and hydrogen-based microbial membrane modules, the oxidation and degradation rates and reduction and removal rates of pollutants are effectively controlled. Compared with ex-situ water treatment technology that extracts polluted water, treats it, and then returns it to the original water body, this invention can achieve deep purification of water in situ, with advantages such as simple operation and low energy consumption.

[0048] 5. In this invention, a heating coil is connected inside the ice-breaking blade. The heating coil is used to heat the ice-breaking blade after the power is turned on. When the ice-breaking blade rotates to break the ice, the heating coil can heat up and accelerate the melting of the ice layer. Furthermore, multiple heat sinks welded to the outer wall of the drainage and heat dissipation shell dissipate heat to the surroundings, which can work with the ice-breaking blade to further accelerate the melting of the ice surface. By removing a large area of ​​ice around the photovoltaic ecological floating island, it is easier to move and maintain the photovoltaic ecological floating island, reduce the freezing damage of the photovoltaic ecological floating island, and save water purification costs. Attached Figure Description

[0049] Figure 1 This is a diagram of the photovoltaic ecological floating island structure of the present invention;

[0050] Figure 2 For the present invention Figure 1 Enlarged view of A in the middle;

[0051] Figure 3 This is a structural diagram of the floating body from the bottom view of the present invention;

[0052] Figure 4 This is a diagram of the central processing unit connection structure of the present invention;

[0053] Figure 5 This is a schematic diagram of the system structure of the present invention;

[0054] Figure 6 This is a flowchart of the method steps of the present invention.

[0055] In the diagram: 1. Electrolytic water reactor for simultaneous hydrogen and oxygen production; 2. Oxygen supply valve; 3. Oxygen-based microbial membrane module; 4. Hydrogen supply valve; 5. Hydrogen-based microbial membrane module; 6. Photovoltaic ecological floating island; 601. Icebreaker plate; 602. Float; 603. Hydroponic tank; 604. Plant support block; 605. Photovoltaic panel; 606. Steering motor; 607. Drive gear; 608. First driven gear; 609. Icebreaker blade; 610. Second driven gear; 611. Electric telescopic rod; 612. L-shaped lifting rod; 613. Fishing net; 614. Vertical plate; 615. Drainage and heat dissipation shell; 616. Heat sink; 617. Water quality sensor group; 618. Microbial attachment tube; 619. Through hole; 620. Threaded connecting ring; 7. Pollutant detection unit; 8. Control unit. Detailed Implementation

[0056] 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.

[0057] Example:

[0058] like Figure 1-4 As shown, this embodiment provides a photovoltaic ecological floating island. The photovoltaic ecological floating island 6 includes an ice-breaking plate 601 and a float 602. A hydroponic trough 603 is provided on the top of the float 602. The interior of the hydroponic trough 603 is used to cultivate hydroponic plants, including water lilies, cattails, canna lilies, and reeds. A servo motor 606 and a drainage and heat dissipation shell 615 are fixed to the bottom of the ice-breaking plate 601. The interior of the hollow hemispherical drainage and heat dissipation shell 615 is used to accommodate the installation of the servo motor 606. At the same time, the drainage and heat dissipation shell 615 can increase the drainage volume of the photovoltaic ecological floating island and increase its drainage capacity. The output end of the servo motor 606 is connected to a drive gear 607. When the servo motor 606 is connected to the photovoltaic power supply, the output end of the servo motor 606 drives the drive gear 607 to rotate, and the drive gear 607 further drives the driven gear meshing with it to rotate.

[0059] A first driven gear 608 meshes with one side of the drive gear 607. An ice-breaking blade 609 is welded to the top of the first driven gear 608 through a first rotating shaft. When the drive gear 607 drives the first driven gear 608 to rotate, the first driven gear 608 drives the ice-breaking blade 609 to rotate further by driving the first rotating shaft inside it. During the rotation of the ice-breaking blade 609, it collides with the ice surface, thereby breaking a large area of ​​ice on the thin ice surface.

[0060] On the other hand, the icebreaker 609 is internally connected to a heating coil, which is used to heat the icebreaker after the power is turned on. When the icebreaker 609 rotates to break the ice, the heating coil can heat up and accelerate the melting of the ice layer. Furthermore, multiple heat sinks 616 welded to the outer wall of the drainage and heat dissipation shell 615 dissipate heat to the surroundings, which can work with the icebreaker 609 to further accelerate the melting of the ice surface. By removing a large area of ​​ice around the photovoltaic ecological floating island 6, it is easier to move and maintain the photovoltaic ecological floating island 6, reduce the freezing damage of the photovoltaic ecological floating island 6, and save water purification costs.

[0061] A water quality sensor group 617 is connected to the bottom of the drainage and heat dissipation housing 615. A photovoltaic panel 605 is fixed to one end of the float 602 via a support frame. The photovoltaic panel 605 collects light energy and outputs electrical energy as a photovoltaic power source. A central processing unit is integrated inside the support frame. The power input terminal of the central processing unit is connected to the photovoltaic power source. The input terminal of the central processing unit is connected to the water quality sensor group 617. The first output terminal of the central processing unit is connected to the heating coil via an infrared photoelectric switch. The second output terminal of the central processing unit is connected to a wireless communication module. The third output terminal of the central processing unit is connected to the input terminal of the servo motor 606. When the temperature collected by the temperature sensor is lower than the minimum threshold temperature, the central processing unit will send a closing signal to the infrared photoelectric switch. The infrared photoelectric switch closes, causing the heating coil to connect to the photovoltaic power source and generate heat. The central processing unit sends the energization status signal of the heating coil to an external terminal via the wireless communication module. The external terminal sends control signals to the servo motor 606 and the electric telescopic rod 611 via the wireless communication module.

[0062] Preferably, a second driven gear 610 meshes with one side of the drive gear 607. A second rotating shaft passes through the interior of the second driven gear 610. An electric telescopic rod 611 is fixed to the top of the second rotating shaft. The input end of the electric telescopic rod 611 is connected to the fourth output end of the central processing unit. An L-shaped lifting rod 612 is connected through the top of the electric telescopic rod 611. A fishing net 613 is connected to the lower end of the L-shaped lifting rod 612. A plumb plate 614 is fixed to the bottom end of the fishing net 613. The fishing net 613 is used to catch floating objects around the photovoltaic ecological floating island 6 and reduce impurities in the water.

[0063] Preferably, the hydroponic trough 603 is arranged in a linear array, and a number of plant support blocks 604 are welded to the inner wall of the hydroponic trough 603. The plant support blocks 604 are used to keep the plants upright.

[0064] Preferably, the drainage and heat dissipation housing 615 is a hollow hemispherical housing, and the water quality sensor group 617 includes a pH sensor, an ammonia nitrogen sensor, a temperature sensor, and a turbidity sensor.

[0065] The hemispherical drainage and heat dissipation housing 615 can increase the heat dissipation area. The input terminals of the water quality sensor group 617 are all connected to the input terminals of the central processing unit. The water quality sensor group 617 can detect the water body in real time and upload the detection data to the central processing unit. The central processing unit sends the received detection data to the external terminal.

[0066] Preferably, the top of the float 602 is provided with multiple through holes 619, and the bottom of the float 602 is welded with a threaded connecting ring 620 coaxial with the corresponding through hole 619. The bottom of the threaded connecting ring 620 is threadedly connected to a microbial attachment tube 618. The microbial attachment tube 618 includes a hollow sealed cylindrical tube with multiple holes on the outer wall. The interior of the microbial attachment tube 618 is filled with zeolite, which is conducive to the attachment of microorganisms in the water.

[0067] Please see Figure 5 This embodiment provides an in-situ deep water purification system. The system includes an electrolytic water simultaneous hydrogen and oxygen production reactor 1, a microbial membrane module, an oxygen supply valve 2, a hydrogen supply valve 4, a photovoltaic ecological floating island 6, a pollutant detection unit 7, and a control unit 8. The electrolytic water simultaneous hydrogen and oxygen production reactor 1 is used to generate oxygen and hydrogen. The electrolytic water simultaneous hydrogen and oxygen production reactor 1 includes an electrolytic hydrogen production device, which generates hydrogen and oxygen by electrolyzing water. The microbial membrane module uses its internal carrier membrane as a physical barrier to intercept suspended solids, colloids, bacteria, some viruses, and macromolecular organic matter in the upstream water, achieving a high degree of solid-liquid separation. This results in low suspended solids content and low turbidity in the treated effluent, which is beneficial to the clarity and stability of the water quality.

[0068] The microbial membrane module includes an oxygen-based microbial membrane module 3 and a hydrogen-based microbial membrane module 5. The oxygen-based microbial membrane module 3 and the hydrogen-based microbial membrane module 5 utilize oxygen and hydrogen generated by the electrolytic water simultaneous hydrogen production reactor 1 as electron acceptors and donors, respectively, to promote the growth and metabolism of the corresponding microorganisms. These microorganisms can degrade recalcitrant organic matter, improving the degradation efficiency of organic matter and thus overcoming the shortcomings of traditional microbial membrane modules in treating recalcitrant organic matter. Through the synergistic effect of the oxygen-based microbial membrane module 3 and the hydrogen-based microbial membrane module 5, deep purification of water can be achieved, improving the quality of effluent and meeting stricter water quality requirements. The electrolysis-hydrogen-oxygen production reactor 1 includes an oxygen output end and a hydrogen output end. The oxygen output end is used to transport the oxygen generated by the reactor 1 to the oxygen-based microbial membrane module 3, and the hydrogen output end is used to transport the hydrogen generated by the reactor 1 to the hydrogen-based microbial membrane module 5. The oxygen output end is connected to the oxygen-based microbial membrane module 3 through an oxygen supply valve 2, and the hydrogen output end is connected to the hydrogen-based microbial membrane module 5 through a hydrogen supply valve 4. By ensuring a stable supply of oxygen and hydrogen, oxygen and hydrogen can be delivered to the corresponding microbial membrane modules, further promoting the growth and metabolic activities of microorganisms. Through this precise gas supply method, the system can fully utilize the degradation capabilities of oxygen-based and hydrogen-based microorganisms to deeply treat recalcitrant organic matter, thereby effectively improving the water purification effect and enhancing the stability and reliability of the system, providing a strong guarantee for deep water purification. Photovoltaic ecological floating islands 6 are fixed at the four corners of the oxygen-based microbial membrane module 3 and the hydrogen-based microbial membrane module 5. By directly connecting the microbial carriers in the floating islands to the membrane modules, a unified biological treatment network is formed. The floating island carrier area serves as a "microbial reservoir" for the membrane module, allowing for rapid replenishment and repair of microorganisms when they are impacted. The photovoltaic ecological floating island 6 not only provides a platform for microorganisms to attach and grow but also enhances the system's ecological effects. Specific aquatic plants can be grown on these floating islands, absorbing nutrients such as nitrogen and phosphorus from the water, further purifying the water. Simultaneously, the photovoltaic panels provide partial shading, suitable for the growth of certain shade-tolerant aquatic plants. The electricity generated is used for the electrical connection of the water electrolysis and simultaneous hydrogen and oxygen production reactor, reducing system energy consumption. Furthermore, the photovoltaic ecological floating island 6 provides habitats for aquatic organisms, increasing biodiversity and creating a more stable and healthy ecosystem. Through the organic integration of the photovoltaic ecological floating island 6 and the microbial membrane module, this system can achieve deep removal of recalcitrant organic matter, significantly improving water purification efficiency.

[0069] The signal input terminals of the simultaneous hydrogen and oxygen production reactor 1, oxygen supply valve 2, and hydrogen supply valve 4 are all connected to the signal output terminal of the control unit 8. The signal input terminal of the control unit 8 is connected to the pollutant detection unit 7, which can monitor the concentration and type of pollutants in the water in real time. Based on the monitoring data, the control unit 8 intelligently adjusts the working status of the simultaneous hydrogen and oxygen production reactor 1 and the opening degree of oxygen supply valve 2 and hydrogen supply valve 4. When the content of recalcitrant organic matter in the water exceeds the preset threshold, the control unit 8 sends a control signal to the simultaneous hydrogen and oxygen production reactor 1 to increase the reaction and increase the production of hydrogen and oxygen. The control unit 8 also precisely adjusts the oxygen supply valve 2 and hydrogen supply valve 4. The gas supply to the oxygen-based microbial membrane module 3 and the hydrogen-based microbial membrane module 5 ensures that the microorganisms obtain sufficient oxygen and hydrogen, thereby fully utilizing their degradation capabilities and achieving deep removal of recalcitrant organic matter. The pollutant detection unit 7 is used to collect COD and nitrogen concentration signals in the river and send the COD and nitrogen concentration signals to the signal input terminal of the control unit 8. The control unit 8 adjusts the supply pressure of hydrogen and oxygen in the electrolytic water synchronous hydrogen production and oxygen generation reactor 1 according to the received COD and nitrogen concentration signals. The control unit 8 sends corresponding control signals to the oxygen supply valve 2 and the hydrogen supply valve 4, and can achieve dynamic response to COD and nitrogen concentration in the river by controlling the opening duration of the oxygen supply valve 2 and the hydrogen supply valve 4.

[0070] When COD and nitrogen concentrations exceed standards, control unit 8 rapidly adjusts the operating status of the electrolytic water-generating and hydrogen-oxygen-producing reactor 1, increasing hydrogen and oxygen production. It also precisely regulates oxygen supply valve 2 and hydrogen supply valve 4 to ensure adequate gas supply to the oxygen-based microbial membrane module 3 and hydrogen-based microbial membrane module 5, accelerating microbial metabolism and improving the degradation efficiency of recalcitrant organic matter. This intelligent control process not only enhances water purification but also ensures system stability and efficiency, providing a strong guarantee for achieving deep water purification.

[0071] Example 1:

[0072] Preferably, four oxygen-containing microbial membrane components 3 are provided. The four oxygen-containing microbial membrane components 3 are parallel to each other and form a square structure. Each oxygen-containing microbial membrane component 3 includes a first carrier membrane on which oxidizing bacteria are attached. At the same time, the four oxygen-containing microbial membrane components are parallel to each other and form a square structure, which not only increases the treatment area, but also improves the stability and purification efficiency of the system, providing strong support for achieving deep water purification.

[0073] Preferably, the hydrogen-based microbial membrane component 5 includes a second carrier membrane on which nitrifying bacteria are attached. The hydrogen-based microbial membrane component 5 is parallel to the oxygen-based microbial membrane component 3, and the number of hydrogen-based microbial membrane components 5 matches that of oxygen-based microbial membrane components 3. Together, they form a highly efficient and stable microbial treatment system. The nitrifying bacteria can use hydrogen as an electron donor to convert ammonia nitrogen into nitrate, further removing nitrogen pollutants from the water. By utilizing the generation of hydrogen and oxygen and through the synergistic effect of microorganisms, the effective removal of recalcitrant organic matter and nitrogen pollutants is achieved, significantly improving the water purification effect. At the same time, the parallel arrangement of the hydrogen-based microbial membrane component 5 and the oxygen-based microbial membrane component 3 ensures the uniformity of gas distribution, improves the utilization efficiency of microorganisms, and provides a more solid guarantee for achieving deep water purification.

[0074] Preferably, both the first and second carrier membranes are non-porous hollow fiber membranes. The use of non-porous hollow fiber membranes effectively prevents microbial leakage while ensuring sufficient contact and reaction time for microorganisms in the treated water. The structure of the non-porous hollow fiber membrane allows microorganisms to attach and grow inside the membrane, forming a stable biofilm, which is beneficial for the enrichment and maintenance of microorganisms. Furthermore, the non-porous hollow fiber membrane also possesses good mechanical strength and chemical stability, enabling it to withstand various environmental factors during the treatment process and ensuring the long-term stable operation of the system, providing strong technical support for achieving deep water purification.

[0075] Preferably, the non-porous hollow fiber membrane is a polyethylene non-porous hollow fiber membrane. The choice of polyethylene material further enhances the durability and corrosion resistance of the non-porous hollow fiber membrane. The polyethylene non-porous hollow fiber membrane not only effectively prevents microbial leakage but also maintains its structural integrity and stability during long-term operation, reducing the frequency of maintenance and replacement and lowering operating costs. Simultaneously, the polyethylene non-porous hollow fiber membrane has good hydrophilicity, which facilitates the attachment and growth of microorganisms on its surface, thereby accelerating the formation and stabilization of the biofilm and improving the efficiency of water purification.

[0076] Preferably, both the oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 are strip-shaped like rugby balls. Four oxygen-based microbial membrane components 3 or hydrogen-based microbial membrane components 5 are combined to form a square or circular assembly. The oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 float on the surface of the river and are perpendicular to the riverbank.

[0077] Preferably, the spacing between the oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 is 6m.

[0078] Example 2:

[0079] Preferably, four oxygen-containing microbial membrane components 3 are provided. The four oxygen-containing microbial membrane components 3 are parallel to each other and form a square structure. Each oxygen-containing microbial membrane component 3 includes a first carrier membrane on which oxidizing bacteria are attached. At the same time, the four oxygen-containing microbial membrane components are parallel to each other and form a square structure, which not only increases the treatment area, but also improves the stability and purification efficiency of the system, providing strong support for achieving deep water purification.

[0080] Preferably, the hydrogen-based microbial membrane component 5 includes a second carrier membrane on which nitrifying bacteria are attached. The hydrogen-based microbial membrane component 5 is parallel to the oxygen-based microbial membrane component 3, and the number of hydrogen-based microbial membrane components 5 matches that of oxygen-based microbial membrane components 3. Together, they form a highly efficient and stable microbial treatment system. The nitrifying bacteria can use hydrogen as an electron donor to convert ammonia nitrogen into nitrate, further removing nitrogen pollutants from the water. By utilizing the generation of hydrogen and oxygen and through the synergistic effect of microorganisms, the effective removal of recalcitrant organic matter and nitrogen pollutants is achieved, significantly improving the water purification effect. At the same time, the parallel arrangement of the hydrogen-based microbial membrane component 5 and the oxygen-based microbial membrane component 3 ensures the uniformity of gas distribution, improves the utilization efficiency of microorganisms, and provides a more solid guarantee for achieving deep water purification.

[0081] Preferably, both the first and second carrier membranes are non-porous hollow fiber membranes. The use of non-porous hollow fiber membranes effectively prevents microbial leakage while ensuring sufficient contact and reaction time for microorganisms in the treated water. The structure of the non-porous hollow fiber membrane allows microorganisms to attach and grow inside the membrane, forming a stable biofilm, which is beneficial for the enrichment and maintenance of microorganisms. Furthermore, the non-porous hollow fiber membrane also possesses good mechanical strength and chemical stability, enabling it to withstand various environmental factors during the treatment process and ensuring the long-term stable operation of the system, providing strong technical support for achieving deep water purification.

[0082] Preferably, the non-porous hollow fiber membrane is a polypropylene non-porous hollow fiber membrane. The choice of polypropylene material gives the non-porous hollow fiber membrane excellent corrosion resistance, enabling it to maintain structural stability and functional integrity under various water quality conditions. Polypropylene material also has good hydrophobicity, which can effectively prevent water from penetrating into the membrane interior, further ensuring the stability and efficiency of the microbial treatment system. This choice of specific material not only improves the durability of the microbial membrane module, but also provides a more reliable technical guarantee for achieving deep water purification.

[0083] Preferably, both the oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 are strip-shaped like rugby balls. Four oxygen-based microbial membrane components 3 or hydrogen-based microbial membrane components 5 are combined to form a square or circular assembly. The oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 float on the surface of the river and are perpendicular to the riverbank.

[0084] Preferably (not shown in the figure), four oxygen-based microbial membrane modules 3 or hydrogen-based microbial membrane modules 5 are connected end to end to form a circular assembly. The circular assembly not only optimizes the layout of the microbial membrane modules in the water body, but also enhances the stability and purification efficiency of the system. By connecting end to end, each microbial membrane module can fully play its role, while facilitating the installation and maintenance of the system. In addition, it helps to increase the contact area between the microbial membrane modules and the water body, thereby further improving the removal effect of recalcitrant organic matter and effectively achieving deep water purification.

[0085] Preferably, the spacing between the oxygen-based microbial membrane component 3 and the hydrogen-based microbial membrane component 5 is 6m.

[0086] Please see Figure 6 A method is also provided, which is applied to an in-situ deep water purification system as described above. The method includes the following steps:

[0087] S1: Start the electrolysis water simultaneous hydrogen and oxygen production reactor 1, and carry out the biofilm formation of oxygen-based microbial membrane module 3 under oxygen supply pressure conditions, with a hydrogen pressure of 2psi to 6psi and a biofilm formation time of 6d to 12d; carry out the biofilm formation of hydrogen-based microbial membrane module 5 under hydrogen supply pressure conditions, with a hydrogen pressure of 4psi to 10psi and a biofilm formation time of 4d to 8d, to obtain the biofilm formed by oxygen-based microbial membrane module 3 and hydrogen-based microbial membrane module 5.

[0088] S2: Operate the electrolysis water synchronous hydrogen and oxygen production reactor 1, so that pollutants in the upstream water body enter the oxygen-based microbial membrane module 3 and are oxidized and degraded to obtain degraded upstream water body; further, the upstream water body enters the hydrogen-based microbial membrane module 5, so that the residual oxides in the upstream water body are reduced and removed, thereby achieving in-situ deep purification of COD and nitrogen pollutants.

[0089] S3: Control the dissolved oxygen concentration in the aerobic carrier zone of the surface layer of the photovoltaic ecological floating island 6 to be 2-6 mg / L, and the dissolved oxygen concentration in the anaerobic carrier zone of the bottom layer to be 0.1-0.5 mg / L;

[0090] S4: The pollutant detection unit 7 collects the concentration signals of COD and nitrogen pollutants in real time and sends the concentration signals of COD and nitrogen pollutants to the control unit 8. The control unit 8 adjusts the oxygen and / or hydrogen pressure by supplying oxygen supply valve 2 and / or hydrogen supply valve 4.

[0091] Preferably, by adjusting the oxygen and hydrogen pressures to oxygen supply valve 2 and hydrogen supply valve 4, the metabolic rates of oxygen-based microorganisms and hydrogen-based microorganisms are dynamically matched, thereby achieving stable operation of the entire system under high removal efficiency.

[0092] Preferably, the electrolysis water simultaneous hydrogen and oxygen production reactor 1 is operated in an intermittent mode with a start / stop time of 2 hours.

[0093] Preferably, in step S1, the oxygen supply pressure is 3 psi and the biofilm formation time is 9 days.

[0094] Preferably, in step S1, the hydrogen supply pressure is 7 psi and the biofilm formation time is 6 days.

[0095] Preferably, the pollutants include COD and nitrogen pollutants.

[0096] Preferably, in step S1, the operation / stop time of the water electrolysis simultaneous hydrogen and oxygen production reactor is 8 hours.

[0097] Preferably, in step S2, the pollutant concentration is 20 mg / L.

[0098] Preferably, in step S2, the operation / stop time of the water electrolysis simultaneous hydrogen and oxygen production reactor is 5 hours.

[0099] Preferably, in step S3, the dissolved oxygen concentration in the aerobic carrier zone of the surface layer of the photovoltaic ecological floating island 6 is controlled at 4 mg / L, and the dissolved oxygen concentration in the anaerobic carrier zone of the bottom layer is controlled at 0.3 mg / L.

[0100] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An in-situ water body depth purification system characterized by, It includes a water electrolysis and hydrogen production reactor (1) and a microbial membrane assembly. The microbial membrane assembly includes an oxygen-based microbial membrane assembly (3) and a hydrogen-based microbial membrane assembly (5). The water electrolysis and hydrogen production reactor (1) is used to produce oxygen and hydrogen. The water electrolysis and hydrogen production reactor (1) includes an oxygen output end and a hydrogen output end. The oxygen output end is connected to the oxygen-based microbial membrane component (3) through the oxygen supply valve (2), and the hydrogen output end is connected to the hydrogen-based microbial membrane component (5) through the hydrogen supply valve (4). Photovoltaic ecological floating islands (6) are fixed at the four corners of the oxygen-based microbial membrane component (3) and the hydrogen-based microbial membrane component (5). The photovoltaic ecological floating island (6) includes an ice-breaking plate (601) and a float (602). A hydroponic tank (603) is opened on the top of the float (602). A servo motor (606) and a drainage and heat dissipation shell (615) are fixed at the bottom of the ice-breaking plate (601). The output end of the servo motor (606) is connected to a drive gear. A first driven gear (608) meshes with one side of a wheel (607). An icebreaker (609) is welded to the top of the first driven gear (608) through a first rotating shaft. A heating coil is connected inside the icebreaker (609). The heating coil is used to heat the icebreaker after the power is turned on. Multiple heat sinks (616) are welded to the outer wall of the drainage and heat dissipation housing (615). A water quality sensor group (617) is connected to the bottom of the drainage and heat dissipation housing (615). A photovoltaic panel (605) is fixed to one end of the float (602) through a support frame. The photovoltaic panel (605) serves as a photovoltaic power source. The source collects light energy and outputs electrical energy. The support frame integrates a central processing unit. The power input terminal of the central processing unit is connected to the photovoltaic power source. The input terminal of the central processing unit is connected to the water quality sensor group (617). The first output terminal of the central processing unit is connected to the heating coil through an infrared photoelectric switch. The second output terminal of the central processing unit is connected to a wireless communication module. The third output terminal of the central processing unit is connected to the input terminal of the servo motor (606). The photovoltaic ecological floating island (6) is equipped with a layered carrier structure. The layered carrier structure includes a surface aerobic carrier area and a bottom anaerobic carrier area. The surface aerobic carrier area is connected to the oxygen source through a connecting pipe. The base microbial membrane module (3) is connected, and the signal input terminals of the electrolytic water synchronous hydrogen production and oxygen generation reactor (1), oxygen supply valve (2), and hydrogen supply valve (4) are all connected to the signal output terminal of the control unit (8). The signal input terminal of the control unit (8) is connected to the pollutant detection unit (7). The pollutant detection unit (7) is used to collect COD and nitrogen concentration signals in the river and send the COD and nitrogen concentration signals to the signal input terminal of the control unit (8). The control unit (8) adjusts the hydrogen and oxygen supply pressure of the electrolytic water synchronous hydrogen production and oxygen generation reactor (1) according to the received COD and nitrogen concentration signals.

2. The in-situ water body depth purification system of claim 1, wherein: The drive gear (607) is meshed with a second driven gear (610) on one side. A second rotating shaft passes through the interior of the second driven gear (610). An electric telescopic rod (611) is fixed to the top of the second rotating shaft. The input end of the electric telescopic rod (611) is connected to the fourth output end of the central processing unit. An L-shaped lifting rod (612) is connected through the top of the electric telescopic rod (611). A fishing net (613) is connected to the lower end of the L-shaped lifting rod (612). A vertical plate (614) is fixed to the bottom end of the fishing net (613).

3. The in-situ water body depth purification system of claim 2, wherein: The hydroponic trough (603) is arranged in a linear array, and several plant support blocks (604) are welded to the inner wall of the hydroponic trough (603).

4. The in-situ water body depth purification system of claim 3, wherein: The drainage and heat dissipation housing (615) is a hollow hemispherical housing, and the water quality sensor group (617) includes a pH sensor, an ammonia nitrogen sensor, a temperature sensor and a turbidity sensor.

5. The in-situ deep water purification system according to claim 4, characterized in that: The top of the float (602) is provided with multiple through holes (619), and the bottom of the float (602) is welded with a threaded connecting ring (620) coaxial with the corresponding through hole (619). The bottom of the threaded connecting ring (620) is threadedly connected to a microbial attachment tube (618). The microbial attachment tube (618) includes a hollow sealed cylindrical tube with multiple holes on the outer wall, and the inside of the microbial attachment tube (618) is filled with zeolite.

6. The in-situ deep water purification system according to claim 5, characterized in that: The oxygen-based microbial membrane component (3) is provided in a plurality of units, which are parallel to each other. The oxygen-based microbial membrane component (3) includes a first carrier membrane, and the hydrogen-based microbial membrane component (5) includes a second carrier membrane. The hydrogen-based microbial membrane component (5) is parallel to the oxygen-based microbial membrane component (3). Both the oxygen-based microbial membrane component (3) and the hydrogen-based microbial membrane component (5) are strip-shaped like a rugby ball. The plurality of oxygen-based microbial membrane components (3) or hydrogen-based microbial membrane components (5) are combined to form a square or circular assembly. The oxygen-based microbial membrane component (3) and / or the hydrogen-based microbial membrane component (5) float on the surface of the river and are perpendicular to the riverbank. The plurality of oxygen-based microbial membrane components (3) or hydrogen-based microbial membrane components (5) are connected end to end to form a circular assembly. The interval between the oxygen-based microbial membrane component (3) and the hydrogen-based microbial membrane component (5) is 2m-10m.

7. The in-situ deep water purification system according to claim 6, characterized in that: The photovoltaic ecological floating island (6) includes a floating frame and a central carrier chamber. The floating frame is made of polyethylene and is filled with closed-cell expanded polystyrene. The central carrier chamber is a cylindrical structure and is equipped with a waterproof and breathable membrane. The waterproof and breathable membrane divides the interior of the central carrier chamber into a first layer and a second layer arranged from top to bottom. The first layer is the surface aerobic carrier area and the second layer is the anaerobic carrier area.

8. The in-situ deep water purification system according to claim 7, characterized in that: The surface aerobic carrier region is filled with a porous ceramic carrier to maintain a dissolved oxygen concentration of 2-6 mg / L. The porous ceramic carrier is connected to the oxygen-containing microbial membrane assembly (3) through a first connecting tube. The bottom anaerobic carrier region is filled with a biochar carrier to maintain a dissolved oxygen concentration of 0.1-0.5 mg / L.

9. A method for in-situ deep purification of water, characterized in that: The method is applied to the in-situ deep water purification system as described in any one of claims 1-8, and the method includes the following steps: S1: Start the electrolysis water synchronous hydrogen production and oxygen generation reactor (1), and carry out the biofilm formation of the oxygen-based microbial membrane module (3) under the oxygen supply pressure condition, with a hydrogen pressure of 2psi~6psi and a biofilm formation time of 6d~12d; carry out the biofilm formation of the hydrogen-based microbial membrane module (5) under the hydrogen supply pressure condition, with a hydrogen pressure of 4psi~10psi and a biofilm formation time of 4d~8d, to obtain the biofilm formed by the oxygen-based microbial membrane module (3) and the hydrogen-based microbial membrane module (5). S2: Operate the electrolysis water synchronous hydrogen production and oxygen generation reactor (1) so that pollutants in the upstream water body enter the oxygen-based microbial membrane module (3) and are oxidized and degraded to obtain degraded upstream water body; further, let the upstream water body enter the hydrogen-based microbial membrane module (5) so that the residual oxides in the upstream water body are reduced and removed, thereby achieving in-situ deep purification of COD and nitrogen pollutants. S3: Control the dissolved oxygen concentration in the aerobic carrier zone of the surface layer of the photovoltaic ecological floating island (6) to be 2-6 mg / L, and the dissolved oxygen concentration in the anaerobic carrier zone of the bottom layer to be 0.1-0.5 mg / L; S4: The pollutant detection unit (7) collects the concentration signals of COD and nitrogen pollutants in real time and sends the concentration signals of COD and nitrogen pollutants to the control unit (8). The control unit (8) adjusts the oxygen and / or hydrogen pressure by supplying oxygen supply valve (2) and / or hydrogen supply valve (4).

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