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

Abstract

The invention discloses a photovoltaic ecological floating island and an in-situ water body deep purification system and method.The photovoltaic ecological floating island comprises an icebreaking plate and a floating body, a water planting groove is formed in the top of the floating body, a steering engine and a water drainage and heat dissipation shell are fixed to the bottom of the icebreaking plate, the output end of the steering engine is connected with a driving gear, and the driving gear is connected with the water drainage and heat dissipation shell; a first driven gear is meshed with one side of the driving gear, an ice breaking knife is welded to the top of the first driven gear through a penetrating first rotating shaft, a heating coil is connected into the ice breaking knife, and the heating coil is used for heating the ice breaking knife after being powered on. According to the photovoltaic ecological floating island disclosed by the invention, by arranging the ice breaking knife and the drainage heat dissipation shell, the ice surface freezing the photovoltaic ecological floating island can be heated and unfrozen, the photovoltaic ecological floating island can be conveniently and rapidly moved and maintained, and by arranging the oxygen-based microbial film assembly, oxidative degradation of ammonia nitrogen and easily degradable COD can be realized, and deep purification of COD and nitrogen pollutants in a water body is realized.

Description

Technical Field

[0001] The present invention relates to the field of environmental protection technology, and in particular to a photovoltaic ecological floating island and an in-situ water body deep purification system and method. Background Art

[0002] Water purification, particularly in the form of black and odorous water bodies, remains a persistent problem. These bodies contain large amounts of chemical oxygen demand (COD) and nitrogen pollutants, some of which are difficult to degrade naturally. These pollutants not only emit foul odors that impact urban landscapes and the quality of life of residents, but also pose a serious threat to ecological security and human health. Therefore, achieving the coordinated, deep removal of COD and nitrogen pollutants from water bodies has become a key technical challenge urgently needed in the field of water environmental management.

[0003] At present, aeration and reoxygenation technology is mainly used for water treatment, but this technology has the following shortcomings:

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

[0005] (2) The removal effect of refractory organic matter is limited, and deep water purification cannot be achieved;

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

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

[0008] Furthermore, the complex variety of pollutants in black and odorous water bodies and their concentrations fluctuate widely, necessitating the establishment of an intelligent control system to ensure on-demand supply of oxygen and hydrogen. Furthermore, traditional water treatment often relies on ex situ treatment, which is not only labor-intensive and energy-intensive, but can also cause secondary disturbances to aquatic ecosystems. Furthermore, traditional gas production relies on external supply, increasing system complexity, operating costs, and safety risks. Purification systems often rely on the purification effects of plants on floating islands, and in cold regions, ice on the water surface can easily freeze the floating islands, making them difficult to move and maintain. Summary of the Invention

[0009] The purpose of the present invention is to provide a photovoltaic ecological floating island and an in-situ water body deep purification system and method. By arranging ice breakers and drainage and heat dissipation shells, the ice surface of the photovoltaic ecological floating island can be heated and thawed, which is convenient for rapid movement and maintenance of the photovoltaic ecological floating island, and reduces the loss of water purification facilities. The oxygen-based microbial membrane component is used to achieve oxidative degradation of ammonia nitrogen and easily degradable COD, and the hydrogen-based microbial membrane component is used to reduce the nitrate oxidation product of ammonia nitrogen into nitrogen gas, and further reduce and remove the difficult-to-degrade COD, thereby achieving deep removal of COD and nitrogen pollutants in the water body. Compared with traditional aeration, it has the advantages of high pollutant removal efficiency and no secondary pollution.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] In the first aspect, a photovoltaic ecological floating island is provided, which includes an icebreaker plate and a floating body. A hydroponic tank is provided on the top of the floating body, a servo and a drainage and heat dissipation shell are fixed to the bottom of the icebreaker plate, the output end of the servo is connected to a driving gear, a first driven gear is engaged with one side of the driving gear, an icebreaker is welded to the top of the first driven gear through a first rotating shaft, a heating coil is connected to the inside of the icebreaker, and the heating coil is used to heat the icebreaker after power is turned on, a plurality of 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 the wireless communication module, and the third output end of the central processing unit is connected to the input end of the servo.

[0012] As a further solution of the present invention: a second driven gear is engaged with one side of the driving 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 passed through the top of the electric telescopic rod, the lower end of the L-shaped lifting rod is connected to a fishing net, and a vertical plate is fixed to the bottom end of the fishing net.

[0013] As a further solution of the present invention: the hydroponic tanks are arranged in a linear array, and a plurality of plant supporting blocks are welded to the inner wall of the hydroponic tanks.

[0014] As a further solution 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 solution of the present invention: a plurality of through holes are opened on the top of the float, a threaded connection ring coaxial with the corresponding through holes is welded to the bottom of the float, the bottom of the threaded connection ring is threadedly connected to a microorganism attachment cylinder, the microorganism attachment cylinder includes a hollow bottom-sealed cylindrical tube with a plurality of holes on the outer wall, and the interior of the microorganism attachment cylinder is filled with zeolite.

[0016] In the second aspect, the present invention provides an in-situ water body deep purification system, the system includes a water electrolysis synchronous hydrogen production and oxygen production reactor and a microbial membrane assembly, the microbial membrane assembly includes an oxygen-based microbial membrane assembly and a hydrogen-based microbial membrane assembly, the water electrolysis synchronous hydrogen production and oxygen production reactor is used to produce oxygen and hydrogen, the water electrolysis synchronous hydrogen production and oxygen production reactor includes an electrolytic hydrogen production device, the electrolytic hydrogen production device produces hydrogen and oxygen by electrolyzing water, the microbial membrane assembly uses the internal carrier membrane as a physical barrier to intercept suspended solids, colloids, bacteria, some viruses and macromolecular organic matter in the upstream water, to achieve a high degree of solid-liquid separation, so that the suspended matter content and turbidity of the treated water outlet are low, which is conducive to the clarity and stability of the water quality, the water electrolysis synchronous hydrogen production and oxygen production reactor includes an oxygen output end and a hydrogen output end, the oxygen output end is used to electrolyze water The oxygen generated by the synchronous hydrogen production and oxygen production reactor is transported to the oxygen-based microbial membrane assembly, and the hydrogen output end is used to transport the hydrogen generated by the synchronous hydrogen production and oxygen production reactor by electrolysis of water to the hydrogen-based microbial membrane assembly; the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly respectively use the oxygen and hydrogen generated by the synchronous hydrogen production and oxygen production reactor by electrolysis of water as electron acceptors and donors to promote the growth and metabolism of corresponding microorganisms. These microorganisms can degrade difficult-to-degrade organic matter and improve the degradation efficiency of organic matter, thereby making up for the shortcomings of traditional microbial membrane assemblies in treating difficult-to-degrade organic matter. Through the synergistic effect of the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly, deep purification of the water body can be achieved, the effluent water quality can be improved, and more stringent water quality requirements can be met. The synchronous hydrogen production and oxygen production reactor by electrolysis of water includes an oxygen output end and a hydrogen output end;

[0017] The oxygen output end is connected to the oxygen-based microbial membrane assembly through the oxygen supply valve, and the hydrogen output end is connected to the hydrogen-based microbial membrane assembly through the hydrogen supply valve. By ensuring a stable supply of oxygen and hydrogen, oxygen and hydrogen can be transported to the corresponding microbial membrane assembly, further promoting the growth and metabolic activities of microorganisms. Through this precise air supply method, the system can give full play to the degradation ability of oxygen-based microorganisms and hydrogen-based microorganisms, and carry out deep treatment of difficult-to-degrade organic matter, thereby effectively improving the purification effect of the water body and enhancing the stability and reliability of the system, providing a strong guarantee for the deep purification of water quality. The four corners of the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly are respectively fixed with photovoltaic ecological floating islands as described in the above scheme. The interior of the floating body of the photovoltaic ecological floating island is provided with a layered carrier structure, which includes a surface aerobic carrier area and a bottom anaerobic carrier area. The surface aerobic carrier area is connected to the oxygen-based microbial membrane assembly through a connecting pipe. By directly connecting the microbial carrier in the floating island with the membrane assembly, a unified biological treatment network is formed. Traditional membrane assemblies are prone to the problem of unstable microbial communities. Through the connecting pipe system, the floating island carrier area becomes a microbial reserve for the membrane assembly, which can be quickly replenished and repaired when the microorganisms in the membrane are impacted. At the same time, the photovoltaic ecological floating island not only provides a platform for microorganisms to attach and grow, but also enhances the ecological effect of the system. Specific aquatic plants can be planted on these floating islands. These plants can absorb nutrients in the water, such as nitrogen, phosphorus and other elements, further purifying the water quality. The photovoltaic panels provide partial shade, suitable for the growth of certain shade-tolerant aquatic plants. The electricity generated is used for the electrolysis of water and the simultaneous production of hydrogen and oxygen, reducing the energy consumption of the system. In addition, the photovoltaic ecological floating island can also provide a habitat for aquatic organisms, increase biodiversity, and thus form a more stable and healthy ecosystem. Through the organic combination of photovoltaic ecological floating islands and microbial membrane components, the system can achieve deep removal of difficult-to-degrade organic matter and significantly improve the water purification effect. The signal input ends of the electrolysis of water and the simultaneous production of hydrogen and oxygen, the oxygen supply valve, and the hydrogen supply valve are all connected to the signal output end of the control unit. The signal input end of the control unit is connected to the pollutant detection unit. The pollutant detection unit is used to collect COD and nitrogen concentration signals in the river channel and send the COD and nitrogen concentration signals to the signal input end of the control unit. The control unit adjusts the hydrogen and oxygen supply pressures of the electrolysis of water and the simultaneous production of hydrogen and oxygen according to the received COD and nitrogen concentration signals.

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

[0019] As a further solution 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 scheme of the present application: the first carrier film and the second carrier film are both non-porous hollow fiber membranes.

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

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

[0023] As a further scheme of the present application: the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly are both strip-shaped rugby balls, and several oxygen-based microbial membrane assemblies or hydrogen-based microbial membrane assemblies are combined to form a square or circular combination body, and the oxygen-based microbial membrane assembly and / or the hydrogen-based microbial membrane assembly floats on the surface of the river channel and is perpendicular to the river bank.

[0024] As a further scheme of the present application: several oxygen-based microbial membrane assemblies or hydrogen-based microbial membrane assemblies are connected end to end to form a circular combination body.

[0025] As a further scheme of the present application: the distance between the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly is 2-10 m.

[0026] As a further scheme of the present application: the photovoltaic ecological floating island comprises a floating body frame and a central carrier cabin, the floating body frame is made of polyethylene material, has excellent weather resistance and ultraviolet resistance, the inside of the floating body frame is filled with closed cell polystyrene, which ensures long-term stability of buoyancy; the central carrier cabin is a cylindrical structure, a waterproof breathable membrane is arranged in the inside of the central carrier cabin, the waterproof breathable membrane divides the inside of the central carrier cabin into a first layer and a second layer arranged from top to bottom, the first layer is a surface layer aerobic carrier area, and the second layer is an anaerobic carrier area.

[0027] As a further scheme of the present application: the inside of the surface layer aerobic carrier area is filled with porous ceramic carriers, the porous ceramic carriers are used to maintain a dissolved oxygen concentration of 2-6 mg / L, such carriers have high specific surface area and good biological affinity, which is beneficial to the attachment and growth of aerobic microorganisms, the porous ceramic carriers are connected with the oxygen-based microbial membrane assembly through a first communication pipe, and microporous aerators are used to continuously supply oxygen to the area, so as to provide a suitable growth environment for aerobic microorganisms.

[0028] As a further scheme of the present application: the inside of the bottom layer anaerobic carrier area is filled with biochar carriers, the biochar carriers are used to maintain a dissolved oxygen concentration of 0.1-0.5 mg / L, the biochar carriers not only have high specific surface area, but also can adsorb organic matter in water, thereby providing rich substrates for anaerobic microorganisms, and the area is designed to be sealed and consumes oxygen, thereby creating a suitable growth environment for anaerobic microorganisms.

[0029] In a third aspect, a method is also provided, which is applied to the in-situ water deep purification system as described in the above scheme, and the method comprises the following steps:

[0030] S1: Start the electrolysis water synchronous hydrogen production and oxygen production reactor, and carry out the oxygen-based microbial membrane assembly to form a membrane under the oxygen supply pressure condition, the hydrogen pressure is 2psi~6psi, and the membrane formation time is 6d~12d; carry out the hydrogen-based microbial membrane assembly to form a membrane under the hydrogen supply pressure condition, the hydrogen pressure is 4psi~10psi, and the membrane formation time is 4d~8d, and obtain the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly with completed membrane formation;

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

[0032] S3: Controlling the dissolved oxygen concentration in the surface aerobic carrier area of ​​the photovoltaic ecological floating island to 2-6 mg / L and the dissolved oxygen concentration in the bottom anaerobic carrier area to 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, which adjusts the oxygen and / or hydrogen pressure through the oxygen supply valve and / or hydrogen supply valve;

[0034] As a further solution 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 and the metabolic rate of hydrogen-based microorganisms are dynamically adapted to achieve stable operation of the entire system at high removal efficiency.

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

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

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

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

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

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

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

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

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1. In the present invention, the oxidative degradation of ammonia nitrogen and easily degradable COD is achieved through the oxygen-based microbial membrane assembly, and the nitrate, the oxidation product of ammonia nitrogen, is reduced and converted into nitrogen gas through the hydrogen-based microbial membrane assembly. At the same time, the difficult-to-degrade COD is further reduced and removed, thereby achieving deep removal of COD and nitrogen pollutants in the water body. The oxygen utilization rate is high, which is beneficial to saving energy and reducing water treatment costs. Compared with traditional aeration, it has the advantages of high pollutant removal efficiency and no secondary pollution. By electrolyzing water and simultaneously producing hydrogen and oxygen to supply the microbial membrane assembly, the ammonia nitrogen and easily degradable COD in the water body are first oxidized and degraded, and then the nitrate, the oxidation product of ammonia nitrogen, is reduced and converted into nitrogen gas, and the difficult-to-degrade COD is further reduced and removed, thereby achieving deep removal of COD and nitrogen pollutants in the water body.

[0045] 2. In the present invention, by real-time detection of COD and nitrogen pollutant concentrations, combined with real-time feedback data, the oxygen and hydrogen pressures are dynamically adjusted to ensure that the metabolic rate of oxygen-based microorganisms is dynamically adapted to the metabolic rate of hydrogen-based microorganisms, thereby achieving stable operation of the entire system at high removal efficiency, with the advantages of simple operation and high degree of automation.

[0046] 3. In the present invention, by utilizing hydrogen produced by water electrolysis as the hydrogen source of the hydrogen-based microbial membrane assembly, and also utilizing oxygen, a byproduct of water electrolysis, as the hydrogen source of the oxygen-based microbial membrane assembly, efficient resource utilization is achieved; at the same time, the present invention adopts membrane aeration to supply oxygen and hydrogen, and the gas supply mode is intermittent. Compared with traditional aeration, it has the advantages of high gas utilization rate and low gas supply volume, which not only saves operating costs, but is also safer and more reliable.

[0047] 4. In the present invention, by utilizing the photovoltaic ecological floating island fixed biofilm assembly with a layered connectivity design, it is not only possible to prevent the biofilm assembly from drifting with the water flow, but also has a certain purification effect on the water body. By directly connecting the microbial carrier in the floating island with the membrane assembly, a unified biological treatment network is formed. The floating island carrier area becomes the "microbial reserve" of the membrane assembly, which can be quickly replenished and repaired when the microorganisms in the membrane are impacted. At the same time, the photovoltaic panels provide partial shading, which is suitable for the growth of certain shade-tolerant aquatic plants. The electricity generated is used for electrolysis of water to synchronize hydrogen and oxygen production reactors, thereby reducing system energy consumption. On the other hand, by adjusting the placement spacing between the oxygen-based microbial membrane assembly and the hydrogen-based microbial membrane assembly, the pollutant oxidation degradation rate and reduction removal rate are effectively regulated. Compared with the ectopic water treatment technology that extracts polluted water, treats it, and then returns it to the original water body, the present invention can achieve deep purification of the water body in situ, with the advantages of simple operation and low energy consumption.

[0048] 5. In the present invention, the interior of the ice breaker is connected to a heating coil, which is used to heat the ice breaker after the power is turned on. When the ice breaker rotates to break the ice, the heating coil can accelerate the melting of the ice layer by increasing the temperature. Furthermore, multiple heat sinks welded on the outer wall of the drainage and heat dissipation shell dissipate heat to the surrounding area, which can cooperate with the ice breaker to further accelerate the melting of the ice surface. By removing the large area of ​​ice around the photovoltaic ecological floating island, it can facilitate the movement and maintenance of the photovoltaic ecological floating island, reduce the freezing damage of the photovoltaic ecological floating island, and save water purification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[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 A magnified view of middle A;

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

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

[0053] Figure 5 Schematic diagram of the system structure of the present invention;

[0054] Figure 6 The figure is a flow chart of the method steps of the present invention.

[0055] In the figure: 1. Water electrolysis synchronous hydrogen and oxygen production reactor; 2. Oxygen supply valve; 3. Oxygen-based microbial membrane assembly; 4. Hydrogen supply valve; 5. Hydrogen-based microbial membrane assembly; 6. Photovoltaic ecological floating island; 601. Icebreaker; 602. Floating body; 603. Hydroponic tank; 604. Plant support block; 605. Photovoltaic panel; 606. Servo; 607. Drive gear; 608. First driven gear; 609. Icebreaker; 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 cylinder; 619. Through hole; 620. Threaded connection ring; 7. Pollutant detection unit; 8. Control unit. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts 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 icebreaker 601 and a float 602. A hydroponic tank 603 is provided on the top of the float 602. The interior of the hydroponic tank 603 is used to cultivate hydroponic plants. The hydroponic plants include water lilies, cattails, cannas and reeds. A servo 606 and a drainage and heat dissipation shell 615 are fixed to the bottom of the icebreaker 601. The interior of the hollow semi-spherical drainage and heat dissipation shell 615 is used to accommodate the installation of the servo 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 the drainage capacity of the photovoltaic ecological floating island. The output end of the servo 606 is connected to the drive gear 607. When the servo 606 is connected to the photovoltaic power supply, the output end of the servo 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 is engaged with one side of the driving gear 607, and an ice-breaking blade 609 is welded to the top of the first driven gear 608 through a first rotating shaft. When the driving gear 607 drives the first driven gear 608 to rotate, the first driven gear 608 further drives the ice-breaking blade 609 to rotate by driving the first rotating shaft running through 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 layer of ice.

[0060] On the other hand, the interior of the ice breaker 609 is connected to a heating coil, which is used to heat the ice breaker after the power is turned on. When the ice breaker 609 rotates to break the ice, the heating coil can accelerate the melting of the ice layer by increasing the temperature. Furthermore, multiple heat sinks 616 welded to the outer wall of the drainage and heat dissipation shell 615 dissipate heat to the surrounding area, which can cooperate with the ice breaker 609 to further accelerate the melting of the ice surface. By removing the large area of ​​ice around the photovoltaic ecological floating island 6, the movement and maintenance of the photovoltaic ecological floating island 6 can be facilitated, the freezing damage of the photovoltaic ecological floating island 6 can be reduced, and the water purification cost can be saved.

[0061] A water quality sensor group 617 is connected to the bottom of the drainage and heat dissipation shell 615, and 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 to collect light energy and output electrical energy. 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, and the input end of the central processing unit is connected to the water quality sensor group 617. The first output end of the central processing unit is connected to the heating coil through an infrared photoelectric switch, and 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 606. When the temperature collected by the temperature sensor is lower than the lowest temperature of the threshold, the central processing unit will send a closing signal to the infrared photoelectric switch. The closure of the infrared photoelectric switch connects the heating coil to the photovoltaic power source to generate heat. The central processing unit sends a power-on status signal of the heating coil to the external terminal through the wireless communication module, and the external terminal sends a control signal to the servo 606 and the electric telescopic rod 611 through the wireless communication module.

[0062] Preferably, a second driven gear 610 is engaged on one side of the driving gear 607, a second rotating shaft is passed 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 passed through the top of the electric telescopic rod 611, the lower end of the L-shaped lifting rod 612 is connected to a fishing net 613, and a vertical 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 to reduce impurities in the water.

[0063] Preferably, the hydroponic tanks 603 are arranged in a linear array, and a plurality of plant support blocks 604 are welded to the inner wall of the hydroponic tanks 603 , and the plant support blocks 604 are used to keep the plants in an upright state.

[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 shell 615 can increase the heat dissipation area. The input ends of the water quality sensor group 617 are connected to the input ends 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, a plurality of through holes 619 are provided on the top of the float 602, and a threaded connection ring 620 coaxial with the corresponding through hole 619 is welded to the bottom of the float 602. The bottom of the threaded connection ring 620 is threadedly connected to a microorganism attachment tube 618. The microorganism attachment tube 618 includes a hollow bottom-sealed cylindrical tube with a plurality of holes on the outer wall. The interior of the microorganism attachment tube 618 is filled with zeolite, which is conducive to the attachment of microorganisms in the water.

[0067] See also Figure 5 In this embodiment, an in-situ water body deep purification system is provided, which includes a water electrolysis synchronous hydrogen and oxygen production reactor 1, a microbial membrane assembly, 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 water electrolysis synchronous hydrogen and oxygen production reactor 1 is used to produce oxygen and hydrogen. The water electrolysis synchronous hydrogen and oxygen production reactor 1 includes an electrolytic hydrogen production device, which produces hydrogen and oxygen by electrolyzing water. The microbial membrane assembly uses the internal carrier membrane as a physical barrier to intercept suspended solids, colloids, bacteria, some viruses and macromolecular organic matter in the upstream water, thereby achieving a high degree of solid-liquid separation, so that the suspended solid content and turbidity of the treated effluent are low, which is conducive to clear and stable water quality;

[0068] The microbial membrane assembly includes an oxygen-based microbial membrane assembly 3 and a hydrogen-based microbial membrane assembly 5. The oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 respectively use the oxygen and hydrogen produced by the electrolysis water synchronous hydrogen production and oxygen production reactor 1 as electron acceptors and donors to promote the growth and metabolism of corresponding microorganisms. These microorganisms can degrade difficult-to-degrade organic matter and improve the degradation efficiency of organic matter, thereby making up for the shortcomings of traditional microbial membrane assemblies in treating difficult-to-degrade organic matter. Through the synergistic effect of the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5, deep purification of the water body can be achieved, the effluent water quality can be improved, and more stringent water quality requirements can be met. The electrolysis water synchronous hydrogen production and oxygen production reactor 1 includes an oxygen output end and a hydrogen output end. The oxygen output end is used to transport the oxygen produced by the electrolysis water synchronous hydrogen production and oxygen production reactor 1 to the oxygen-based microbial membrane assembly 3, and the hydrogen output end is used to transport the hydrogen produced by the electrolysis water synchronous hydrogen production and oxygen production reactor 1 to the hydrogen-based microbial membrane assembly 5. The oxygen output end is connected to the oxygen-based microbial membrane assembly 3 through the oxygen supply valve 2, and the hydrogen output end is connected to the hydrogen-based microbial membrane assembly 5 through the hydrogen supply valve 4. By ensuring a stable supply of oxygen and hydrogen, oxygen and hydrogen can be transported to the corresponding microbial membrane assembly, further promoting the growth and metabolic activity of microorganisms. Through this precise gas supply method, the system can give full play to the degradation capabilities of oxygen-based microorganisms and hydrogen-based microorganisms, and deeply treat difficult-to-degrade organic matter, thereby effectively improving the purification effect of the water body and enhancing the stability and reliability of the system, providing a strong guarantee for deep water purification. Photovoltaic ecological floating islands 6 are fixed to the four corners of the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5. By directly connecting the microbial carriers in the floating islands with the membrane assembly, a unified biological treatment network is formed. The floating island carrier area becomes the membrane assembly's "microbial reservoir," allowing for rapid replenishment and repair of microorganisms within the membrane when impacted. The photovoltaic ecological floating islands 6 not only provide a platform for microorganisms to attach and grow, but also enhance the system's ecological benefits. These islands can be used to grow specific aquatic plants, which absorb nutrients from the water, such as nitrogen and phosphorus, further purifying the water. The photovoltaic panels also provide partial shade, suitable for the growth of certain shade-tolerant aquatic plants. The electricity generated is used to connect the water electrolysis reactor for simultaneous hydrogen and oxygen production, reducing system energy consumption. Furthermore, the photovoltaic ecological floating islands 6 provide a habitat for aquatic life, increasing biodiversity and thus forming a more stable and healthy ecosystem. Through the organic combination of the photovoltaic ecological floating islands 6 and the microbial membrane assembly, the system can achieve deep removal of difficult-to-degrade organic matter, significantly improving water purification.

[0069] The signal input ends of the electrolysis water synchronous hydrogen production and oxygen production reactor 1, the oxygen supply valve 2, and the hydrogen supply valve 4 are all connected to the signal output end of the control unit 8. The signal input end of the control unit 8 is connected to the pollutant detection unit 7. The pollutant detection unit 7 can monitor the concentration and type of pollutants in the water body in real time. According to the monitoring data, the control unit 8 intelligently adjusts the working state of the electrolysis water synchronous hydrogen production and oxygen production reactor 1, as well as the opening degree of the oxygen supply valve 2 and the hydrogen supply valve 4. When it is detected that the content of difficult-to-degrade organic matter in the water body exceeds the preset threshold value, the control unit 8 sends a control signal to the electrolysis water synchronous hydrogen production and oxygen production reactor 1 to increase the reaction, increase the production of hydrogen and oxygen, and accurately adjust through the oxygen supply valve 2 and the hydrogen supply valve 4. The amount of air supplied to the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 ensures that the microorganisms obtain sufficient oxygen and hydrogen, so as to give full play to their degradation ability and achieve deep removal of difficult-to-degrade organic matter. The pollutant detection unit 7 is used to collect COD and nitrogen concentration signals in the river channel, and send the COD and nitrogen concentration signals to the signal input end of the control unit 8. The control unit 8 adjusts the supply pressure of hydrogen and oxygen of the electrolysis water synchronous hydrogen production and oxygen production 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 the COD and nitrogen concentrations in the river channel by controlling the opening time 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 state of the simultaneous water electrolysis and hydrogen production reactor 1 to increase hydrogen and oxygen production. It also precisely regulates oxygen supply valve 2 and hydrogen supply valve 4 to ensure that the oxygen-based microbial membrane assembly 3 and hydrogen-based microbial membrane assembly 5 receive the appropriate amount of gas, accelerating microbial metabolism and increasing the efficiency of degrading difficult-to-degrade organic matter. This intelligent control process not only improves water purification effectiveness but also ensures system stability and efficiency, providing a strong foundation for achieving deep water purification.

[0071] Example 1:

[0072] Preferably, four oxygen-based microbial membrane assemblies 3 are provided, and the four oxygen-based microbial membrane assemblies 3 are parallel to each other and form a square structure. The oxygen-based microbial membrane assembly 3 includes a first carrier membrane, on which oxidizing bacteria are attached. At the same time, the four oxygen-based microbial membrane assemblies 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 assembly 5 includes a second carrier membrane, on which nitrifying bacteria are attached. The hydrogen-based microbial membrane assembly 5 is parallel to the oxygen-based microbial membrane assembly 3, and the number of hydrogen-based microbial membrane assemblies 5 matches that of the oxygen-based microbial membrane assembly 3, which are combined to form an efficient and stable microbial treatment system. Nitrifying bacteria can use hydrogen as an electron donor to convert ammonia nitrogen into nitrate, further removing nitrogen pollutants in the water. By utilizing the production of hydrogen and oxygen and the synergistic effect of microorganisms, effective removal of difficult-to-degrade organic matter and nitrogen pollutants is achieved, significantly improving the effect of water purification. At the same time, the parallel layout of the hydrogen-based microbial membrane assembly 5 and the oxygen-based microbial membrane assembly 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. This prevents microbial leakage while ensuring sufficient contact and reaction time between the microorganisms and the treated water. The structure of the non-porous hollow fiber membranes allows microorganisms to attach and grow within the membranes, forming a stable biofilm that facilitates the enrichment and retention of microorganisms. Furthermore, the non-porous hollow fiber membranes possess excellent mechanical strength and chemical stability, allowing them to withstand various environmental factors during the treatment process, ensuring long-term stable operation of the system and 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 can not only effectively prevent the leakage of microorganisms, but also maintain its structural integrity and stability during long-term operation, reducing the frequency of maintenance and replacement and lowering operating costs. At the same time, 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 stability of the biofilm and improving the efficiency of water purification.

[0076] Preferably, the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 are both in the shape of a strip of rugby ball, and four oxygen-based microbial membrane assemblies 3 or hydrogen-based microbial membrane assemblies 5 are combined to form a square or circular assembly, and the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 float on the surface of the river and are perpendicular to the river bank.

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

[0078] Example 2:

[0079] Preferably, four oxygen-based microbial membrane assemblies 3 are provided, and the four oxygen-based microbial membrane assemblies 3 are parallel to each other and form a square structure. The oxygen-based microbial membrane assembly 3 includes a first carrier membrane, on which oxidizing bacteria are attached. At the same time, the four oxygen-based microbial membrane assemblies 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 assembly 5 includes a second carrier membrane, on which nitrifying bacteria are attached. The hydrogen-based microbial membrane assembly 5 is parallel to the oxygen-based microbial membrane assembly 3, and the number of hydrogen-based microbial membrane assemblies 5 matches that of the oxygen-based microbial membrane assembly 3, which are combined to form an efficient and stable microbial treatment system. Nitrifying bacteria can use hydrogen as an electron donor to convert ammonia nitrogen into nitrate, further removing nitrogen pollutants in the water. By utilizing the production of hydrogen and oxygen and the synergistic effect of microorganisms, effective removal of difficult-to-degrade organic matter and nitrogen pollutants is achieved, significantly improving the effect of water purification. At the same time, the parallel layout of the hydrogen-based microbial membrane assembly 5 and the oxygen-based microbial membrane assembly 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. This prevents microbial leakage while ensuring sufficient contact and reaction time between the microorganisms and the treated water. The structure of the non-porous hollow fiber membranes allows microorganisms to attach and grow within the membranes, forming a stable biofilm that facilitates the enrichment and retention of microorganisms. Furthermore, the non-porous hollow fiber membranes possess excellent mechanical strength and chemical stability, allowing them to withstand various environmental factors during the treatment process, ensuring long-term stable operation of the system and 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 selection of polypropylene material gives the non-porous hollow fiber membrane excellent corrosion resistance, and can maintain structural stability and functional integrity under various water conditions. Polypropylene material also has good hydrophobicity, which can effectively prevent moisture from penetrating into the interior of the membrane, further ensuring the stability and efficiency of the microbial treatment system. The selection of this specific material not only improves the durability of the microbial membrane assembly, but also provides a more reliable technical guarantee for achieving deep water purification.

[0083] Preferably, the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 are both in the shape of a strip of rugby ball, and four oxygen-based microbial membrane assemblies 3 or hydrogen-based microbial membrane assemblies 5 are combined to form a square or circular assembly, and the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 float on the surface of the river and are perpendicular to the river bank.

[0084] Preferably (not shown), four oxygen-based microbial membrane modules 3 or hydrogen-based microbial membrane modules 5 are connected end to end to form a circular combination. The circular combination not only optimizes the layout of the microbial membrane module 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 also helps to increase the contact area between the microbial membrane module and the water body, thereby further improving the removal effect of difficult-to-degrade organic matter and effectively achieving deep water purification.

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

[0086] See Figure 6 , also provides a method, which is applied to the in-situ water deep purification system as the above solution, and the method comprises the following steps:

[0087] S1: Start the electrolysis water synchronous hydrogen production and oxygen production reactor 1, and carry out the oxygen-based microbial membrane assembly 3 to form a membrane under the oxygen supply pressure condition, the hydrogen pressure is 2psi to 6psi, and the membrane formation time is 6d to 12d; carry out the hydrogen-based microbial membrane assembly 5 to form a membrane under the hydrogen supply pressure condition, the hydrogen pressure is 4psi to 10psi, and the membrane formation time is 4d to 8d, to obtain the oxygen-based microbial membrane assembly 3 and the hydrogen-based microbial membrane assembly 5 that have completed the membrane formation;

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

[0089] S3: Controlling the dissolved oxygen concentration in the surface aerobic carrier area of ​​the photovoltaic ecological floating island 6 to 2-6 mg / L and the dissolved oxygen concentration in the bottom anaerobic carrier area to 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 the oxygen supply valve 2 and / or the hydrogen supply valve 4.

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

[0092] Preferably, the operation mode of the water electrolysis synchronous hydrogen production and oxygen production reactor 1 is an intermittent operation mode, and the operation / stop time is 2 hours.

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

[0094] Preferably, in step S1, the hydrogen supply pressure is 7 psi and the film 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 synchronous 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 synchronous hydrogen and oxygen production reactor is 5 hours.

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

[0100] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A photovoltaic ecological floating island, characterized in that: The photovoltaic ecological floating island (6) includes an icebreaker plate (601) and a floating body (602). A hydroponic tank (603) is provided on the top of the floating body (602). A steering gear (606) and a drainage and heat dissipation shell (615) are fixed to the bottom of the icebreaker plate (601). The output end of the steering gear (606) is connected to a driving gear (607). A first driven gear (608) is engaged with one side of the driving gear (607). An icebreaker knife (609) is welded to the top of the first driven gear (608) through a first rotating shaft. A heating coil is connected to the inside of the icebreaker knife (609). The heating coil is used to heat the icebreaker knife after power is turned on. The outer wall of the drainage and heat dissipation shell (615) is welded to the icebreaker knife (609). A plurality of heat sinks (616) are connected, a water quality sensor group (617) is connected to the bottom of the drainage and heat dissipation shell (615), a photovoltaic panel (605) is fixed to one end of the float (602) through 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, a power input end of the central processing unit is connected to the photovoltaic power source, an input end of the central processing unit is connected to the water quality sensor group (617), a first output end of the central processing unit is connected to a heating coil through an infrared photoelectric switch, a second output end of the central processing unit is connected to a wireless communication module, and a third output end of the central processing unit is connected to an input end of a steering gear (606).

2. The photovoltaic ecological floating island according to claim 1, characterized in that: A second driven gear (610) is meshed with one side of the driving gear (607), a second rotating shaft is passed through the interior of the second driven gear (610), an electric telescopic rod (611) is fixed to the top of the second rotating shaft, an 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 passed 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), and a vertical plate (614) is fixed to the bottom end of the fishing net (613).

3. The photovoltaic ecological floating island according to claim 2, characterized in that: The hydroponic tanks (603) are arranged in a linear array, and a plurality of plant supporting blocks (604) are welded to the inner wall of the hydroponic tanks (603).

4. The photovoltaic ecological floating island according to claim 3 is characterized by: 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 photovoltaic ecological floating island according to claim 4 is characterized by: The top of the float (602) is provided with a plurality of through holes (619), and the bottom of the float (602) is welded with a threaded connection ring (620) coaxial with the corresponding through holes (619). The bottom of the threaded connection ring (620) is threadedly connected to a microorganism attachment tube (618). The microorganism attachment tube (618) includes a hollow bottom-sealed cylindrical tube with a plurality of holes on the outer wall, and the interior of the microorganism attachment tube (618) is filled with zeolite.

6. An in-situ water deep purification system, characterized in that: The invention comprises a water electrolysis synchronous hydrogen production and oxygen production reactor (1) and a microbial membrane assembly, wherein the microbial membrane assembly comprises an oxygen-based microbial membrane assembly (3) and a hydrogen-based microbial membrane assembly (5), and the water electrolysis synchronous hydrogen production and oxygen production reactor (1) is used to produce oxygen and hydrogen, and the water electrolysis synchronous hydrogen production and oxygen production reactor (1) comprises an oxygen output end and a hydrogen output end; The oxygen output end is connected to the oxygen-based microbial membrane assembly (3) through the oxygen supply valve (2), and the hydrogen output end is connected to the hydrogen-based microbial membrane assembly (5) through the hydrogen supply valve (4). The four corners of the oxygen-based microbial membrane assembly (3) and the hydrogen-based microbial membrane assembly (5) are respectively fixed with the photovoltaic ecological floating island (6) according to any one of claims 1 to 5. A layered carrier structure is provided inside the photovoltaic ecological floating island (6), and 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-based microbial membrane assembly (3) through a connecting pipe. The signal input ends of the water electrolysis synchronous hydrogen production and oxygen production reactor (1), the oxygen supply valve (2), and the hydrogen supply valve (4) are all connected to the signal output end of the control unit (8). The signal input end 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 channel and send the COD and nitrogen concentration signals to the signal input end of the control unit (8). The control unit (8) adjusts the supply pressure of hydrogen and oxygen of the water electrolysis synchronous hydrogen production and oxygen production reactor (1) according to the received COD and nitrogen concentration signals.

7. The in-situ water deep purification system according to claim 6, characterized in that: The oxygen-based microbial membrane components (3) are provided in plurality, and the oxygen-based microbial membrane components (3) are parallel to each other. The oxygen-based microbial membrane components (3) include a first carrier membrane, and the hydrogen-based microbial membrane components (5) include a second carrier membrane. The hydrogen-based microbial membrane components (5) are parallel to the oxygen-based microbial membrane components (3). The oxygen-based microbial membrane components (3) and the hydrogen-based microbial membrane components (5) are both in the shape of a rugby ball. The oxygen-based microbial membrane components (3) or the hydrogen-based microbial membrane components (5) are combined to form a square or circular combination. The oxygen-based microbial membrane components (3) and / or the hydrogen-based microbial membrane components (5) float on the surface of the river channel and are perpendicular to the river bank. The oxygen-based microbial membrane components (3) or the hydrogen-based microbial membrane components (5) are connected end to end to form a circular combination. The interval between the oxygen-based microbial membrane components (3) and the hydrogen-based microbial membrane components (5) is 2m-10m.

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

9. The in-situ water deep purification system according to claim 8, characterized in that: The interior of the surface aerobic carrier zone is filled with a porous ceramic carrier, which is used to maintain a dissolved oxygen concentration of 2-6 mg / L. The porous ceramic carrier is connected to the oxygen-based microbial membrane assembly (3) through a first connecting pipe. 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.

10. A method, characterized in that: The method is applied to the in-situ water deep purification system according to any one of claims 6 to 9, and the method comprises the following steps: S1: Start the electrolysis water synchronous hydrogen production and oxygen production reactor (1), and carry out the oxygen-based microbial membrane assembly (3) to form a membrane under the oxygen supply pressure condition, the hydrogen pressure is 2psi to 6psi, and the membrane forming time is 6d to 12d; carry out the hydrogen-based microbial membrane assembly (5) to form a membrane under the hydrogen supply pressure condition, the hydrogen pressure is 4psi to 10psi, and the membrane forming time is 4d to 8d, to obtain the oxygen-based microbial membrane assembly (3) and the hydrogen-based microbial membrane assembly (5) that have completed the membrane forming; S2: running the electrolysis water synchronous hydrogen production and oxygen production reactor (1), so that pollutants in the upstream water of the river enter the oxygen-based microbial membrane assembly (3) and are oxidized and degraded to obtain the degraded upstream water; further, after the upstream water enters the hydrogen-based microbial membrane assembly (5), the residual oxides in the upstream water are reduced and removed, thereby achieving in-situ deep purification of COD and nitrogen pollutants; S3: controlling the dissolved oxygen concentration of the surface aerobic carrier area of ​​the photovoltaic ecological floating island (6) to 2-6 mg / L, and the dissolved oxygen concentration of the bottom anaerobic carrier area to 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 the oxygen supply valve (2) and / or the hydrogen supply valve (4).

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