Electrolytic assemblies and water treatment systems based on BDD electrodes

Abstract

The present invention provides an electrolysis assembly based on a BDD electrode, the electrolysis assembly including a water flow guiding module and an electrolysis module installed in the water flow guiding module, the electrolysis module including a BDD electrode, the BDD electrode including a body and a plurality of branches installed on both sides of the body, the body and the branches forming a fishbone structure. The BDD electrode of the electrolysis assembly of the present invention has a fishbone structure, and gas generated during electrolysis is less likely to clog the holes than the conventional orifice plate electrode structure, and the gas can be easily pushed out and discharged by the cooperation of the water flow guiding module, thereby realizing efficient discharge of gas products, reducing the probability of clogging by particulate matter, ensuring an effective electrolysis reaction area, and improving electrolysis efficiency and water treatment efficiency. The present invention further provides a water treatment system including the electrolysis assembly, which cooperates with a filter assembly and a gas-liquid mixing assembly to effectively improve the treatment effect.

Description

[Technical field]

[0001] The present invention relates to the technical field of electrochemistry, and in particular to an electrolysis assembly and water treatment system based on BDD electrodes. [Background technology]

[0002] Boron-doped diamond (BDD) electrodes are manufactured by depositing a boron-doped diamond film on a substrate using a vapor deposition method, and the BDD electrodes electrolyze water in water after passing an electric current through them, generating active ingredients such as ozone and hydroxyl radicals, which can oxidize viruses, bacteria, organic pollutants, etc. BDD electrodes have the advantages of high oxygen generation potential and high electrocatalytic activity, as well as excellent chemical stability and can withstand electrode wear caused by electrochemical corrosion during long-term electrolysis applications, and are widely used in disinfection and sterilization and water treatment in, for example, spray pots, humidifiers, vegetable washers, washing machines, air purifiers, water purifiers, deodorizers, sewage treatment machines, etc.

[0003] However, the conventional BDD electrode technology has the following problems.

[0004] 1. The structural form of conventional BDD electrodes is two-dimensional and flat. Generally, the surface and structural form are processed by sandblasting, laser drilling and cutting, water jet, chemical etching and other processing methods to increase the surface area and improve the reaction efficiency. However, these processing methods are usually prone to processing stress (e.g., processing stress caused by laser drilling and cutting), which affects the mechanical strength and has low processing efficiency.

[0005] 2. The commonly used electrode structure of two-dimensional flat BDD electrodes is generally a simple flat plate, orifice plate, etc. (see Fig. 1), and the water flow direction is perpendicular to the exhaust direction during application (see Fig. 2), which makes it difficult for hydrogen gas and ozone generated during the operation of the electrolysis assembly to be discharged in a timely manner, reducing the effective operating area and hindering the efficient progress of the electrolysis reaction. In addition, if the treated water contains particulate matter or impurities are accumulated during the electrochemical reaction process, it is easy to block the exhaust hole (or groove), reducing the electrolysis efficiency. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides an electrolysis assembly and water treatment system based on a BDD electrode to solve problems such as the difficulty of timely exhaust of gases such as hydrogen gas, ozone, and oxygen gas generated during electrolysis in a conventional BDD electrode, which reduces the effective operating area and inhibits the efficient progress of the electrolysis reaction, and when particulate matter is contained in the treated water or impurities are accumulated during the electrochemical reaction process, the exhaust hole (or groove) is easily clogged, resulting in a decrease in the electrolysis efficiency. [Means for solving the problem]

[0007] In one aspect, an electrolysis assembly based on a BDD electrode according to the present invention includes a water flow guiding module and an electrolysis module, the electrolysis module being disposed within the water flow guiding module, the electrolysis module including a BDD electrode, the BDD electrode including a main body and a plurality of branch portions disposed on both sides of the main body, the main body and the plurality of branch portions on both sides thereof forming a fishbone-like structure.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The BDD electrode of the present invention includes a body and a plurality of branches provided on both sides of the body, the body and the branches form a fishbone-shaped structure, and compared with the conventional orifice plate electrode structure, the fishbone-shaped structure ensures that the side slits between the adjacent branches have no dead ends, and the gas generated during electrolysis does not block the holes, and the cooperation of the water flow guiding module makes it easy to push and discharge the gas when the water flow passes through the electrolysis module, and easily removes the accumulated impurities, realizing the efficient discharge of the gas products, reducing the probability of clogging by particulate matter, ensuring an effective electrolysis reaction area, and improving the electrolysis efficiency and water treatment efficiency.

[0009] In some embodiments of the invention, the spacing between adjacent branches is between 0.05 mm and 2.5 mm, the width of each branch is between 0.05 mm and 10 mm, and the included angle between each branch and the main body toward the tail of the fishbone-like structure is between 0 and 90°.

[0010] The above-mentioned further technical means have the following beneficial effects: all processing devices have a certain specification, and the range of the interval between adjacent branches (i.e., the side slit width) is set according to the specification of the processing device to facilitate the processing of the fishbone-shaped structure, and based on the design of the side slit width, the width range of each branch is 0.05mm-10mm, which can guarantee the reaction area when the BDD electrode and water contact in the electrolysis module, and can guarantee the electrolysis efficiency while guaranteeing the strength of the BDD electrode, and the width range is favorable for discharging the gas generated by the electrolysis reaction, and the included angle between each branch and the main body toward the tail of the fishbone-shaped structure is designed to be 0-90°, which is favorable for pushing away the gas generated in the side slit between adjacent branches during the electrolysis process in cooperation with the water flow.

[0011] In some embodiments of the present invention, the BDD electrode is fabricated by depositing a boron-doped diamond film on a fishbone-structured substrate, the material of the substrate being one selected from titanium, niobium, tantalum, nickel, single crystal silicon, polycrystalline silicon, silicon carbide single crystal, silicon carbide ceramic, silicon nitride single crystal, and silicon nitride ceramic, and the substrate is processed by a diamond wire cutting method.

[0012] The above-mentioned further technical means have the following beneficial effects. The fishbone-shaped structure of the BDD electrode originates from the fishbone-shaped structure of the substrate, and if a boron-doped diamond film is deposited on the substrate with the fishbone-shaped structure, a BDD electrode with a fishbone-shaped structure is obtained. The material selection of the substrate is favorable for the deposition of the boron-doped diamond film, and the boron-doped diamond film is not easily dropped off. The side-cut processing of the substrate of the BDD electrode using diamond wire cutting to obtain a fishbone-shaped structure has a smaller processing stress and a higher substrate strength than the conventional processing methods, such as laser drilling and cutting (due to the existence of a laser high heat-affected area, large residual stress occurs due to the problem of thermal expansion, and microcracks are likely to occur around the processing position after processing). Tests have demonstrated that the processing efficiency of diamond wire cutting processing is the highest, and the processing efficiency can be effectively improved.

[0013] In some embodiments of the invention, the BDD electrodes include an anode BDD electrode and a cathode BDD electrode, with an ionic membrane provided between the anode BDD electrode and the cathode BDD electrode.

[0014] The use of the above-mentioned further technical means has the following beneficial effects. The ionic membrane, the BDD electrode serving as the anode, and the BDD electrode serving as the cathode form a BDD sandwich structure to constitute one electrolytic cell. The ionic membrane has selective permeability to ions and allows the passage of charged ions, and the hydrogen ions generated by the BDD electrode electrolyzing water permeate the ionic membrane at high speed due to the high-speed channel of the ionic membrane, thereby meeting the requirements for electrolysis efficiency. The efficiency of electrolysis is higher when an ionic membrane is provided than when electrolysis is achieved using only ions in water without the ionic membrane.

[0015] In some embodiments of the present invention, the water flow guide module includes a main water inlet guide pipe, a cavity communicating with the main water inlet guide pipe and having a side perpendicular to the main water inlet guide pipe, and a branch water inlet guide pipe communicating with the cavity and the main water inlet guide pipe and whose communicating end with the cavity is perpendicular to the upper and lower surfaces of the cavity, the electrolysis module is disposed within the cavity and is parallel to the upper and lower surfaces of the cavity, and the tail of the fishbone-shaped structure BDD electrode is away from the main water inlet guide pipe.

[0016] The above-mentioned further technical means have the following beneficial effects: the main inlet water guide pipe of the water flow guide module of the present invention controls the direction of the main water flow, and the branch inlet water guide pipe controls the direction of the branch water flow. Because the side of the cavity is perpendicular to the main inlet water guide pipe, the direction of the main water flow is consistent with the direction from the neck to the tail of the fishbone-shaped BDD electrode, and because the connection end between the branch inlet water guide pipe and the cavity is perpendicular to the upper and lower sides of the cavity, the direction of the branch water flow is perpendicular to the fishbone-shaped BDD electrode, that is, the branch water flow sweeps through the side slits between the adjacent branches to drive out the gas in the side slits, and the sweeping gas is removed by the action of the main water flow, which further realizes the mutual cooperation between the electrolysis module including the fishbone-shaped BDD electrode and the water flow guide module, improves the gas discharge efficiency and the sediment discharge efficiency, ensures the effective electrolysis reaction area, and ensures the electrolysis efficiency. In addition, the mutual cooperation between the electrolysis module including the fishbone-structured BDD electrode of the present invention and the water flow guiding module increases the cooling efficiency of the water flow for the electrolysis module, thereby solving the problem of heat generation by the BDD electrode during the electrolysis process. Compared with the conventional technology, the current density per unit area of ​​the electrode is higher, and higher electrolysis efficiency can be obtained.

[0017] In some embodiments of the present invention, a pipe diameter ratio between the branch water inlet guide pipe and the main water inlet guide pipe is 1:1 to 1:20.

[0018] The use of the above-mentioned additional technical means has the following beneficial effects: In the present invention, the pipe diameter ratio of the branch water inlet guide pipe to the main water inlet guide pipe is designed to be 1:1 to 1:20, which effectively controls the magnitude of the water flow rate in the main branch passage and further controls the flow speed of each water flow, thereby realizing efficient discharge of gas.

[0019] In some embodiments of the present invention, the water flow in the branched inlet water guide pipe is controlled by a switch having a pulse control characteristic.

[0020] The use of the above-mentioned further technical means has the following beneficial effects: By providing a switch in the branch water inlet guide pipe, it is possible to control the opening and closing of the branch water flow and the magnitude of the water flow rate, and the pulse control characteristics are realized by the switching frequency of the branch water inlet guide pipe, and the pulse water flow is more advantageous for the detachment and discharge of air bubbles generated in the BDD electrode.

[0021] In some embodiments of the present invention, the end of the branched water inlet guide pipe communicating with the cavity is of a round tube type, duckbill type or splitter type structure.

[0022] The use of the above-mentioned further technical means has the following beneficial effects: the end of the branched water inlet guide pipe communicating with the cavity is designed in a round pipe, duckbill or split structure, corresponding to the branching section of the fishbone structure, which is advantageous for the water flow introduced from the branched water inlet guide pipe to flush the side slits between two adjacent branching sections, and especially the split structure, each branch pipe of which corresponds to one side slit, has a better slit flushing effect and higher gas discharge efficiency.

[0023] In another aspect, the present invention further relates to a water treatment system comprising the electrolysis assembly of any one of the above claims, and further comprising a filtration assembly and a gas-liquid mixing assembly, wherein the electrolysis assembly is located between the filtration assembly and the gas-liquid mixing assembly, and communicates with the filtration assembly via a water inlet passage and communicates with the gas-liquid mixing assembly via a water outlet passage.

[0024] Compared with the prior art, the present invention has the following beneficial effects: The water treatment system of the present invention includes the electrolysis assembly, the filtration assembly and the gas-liquid mixing assembly of the present invention. Before the water flow enters the electrolysis assembly, the filtration assembly pre-filters some particles and suspended matter, and the electrolysis assembly performs electrolysis treatment, so that these particles and suspended matter electrochemically aggregate into large particles and can avoid blocking the side slits between the two adjacent branches; after the water flow passes through the electrolysis assembly, the gas-liquid mixing assembly performs gas-liquid mixing, so that the ozone generated by the electrolysis reaction is more thoroughly mixed with the water, effectively improving the ozone concentration in the treated water, and improving the disinfection, sterilization and treatment effect.

[0025] In some embodiments of the present invention, the filtration assembly is a filtration assembly with a backwash function, the pore size of the filtration membrane is 0.2-75 μm, the gas-liquid mixing method of the gas-liquid mixing assembly uses micropore aeration and / or spiral gas mixing, and the ratio of the cross-sectional area of ​​the water inlet passage between the filtration assembly and the electrolysis assembly to the cross-sectional area of ​​the water outlet passage between the electrolysis assembly and the gas-liquid mixing assembly is 1:3-20:1.

[0026] The above-mentioned further technical means have the following beneficial effects. The filtration assembly has a backwash function, which can prevent the pores of the filtration membrane from being blocked, and can timely discharge the filtered filtrate and guarantee the outflow speed of the liquid after filtration. When the pore size of the filtration membrane is 0.2-75 μm, the particles and suspended matter whose particle size is within this range can be filtered and removed, and the problems that these particles and suspended matter electrochemically aggregate to become large particles when the electrolysis assembly performs electrolysis treatment, block the side slits between two adjacent branches, and the large particles are difficult to discharge by slit flushing, etc. can be avoided. The use of micropore aeration and / or spiral gas mixing is advantageous to more sufficient gas-liquid mixing. The ratio of the cross-sectional area of ​​the inlet water passage between the filtration assembly and the electrolysis assembly to the cross-sectional area of ​​the outlet water passage between the electrolysis assembly and the gas-liquid mixing assembly is designed to be 1:3-20:1 in order to make the electrolysis treatment and gas-liquid mixing more efficient in accordance with the treatment efficiency of the electrolysis assembly and the gas-liquid mixing assembly, and to ensure the treatment efficiency of the entire water treatment system.

[0027] In order to describe the technical solutions in the embodiments of the present invention more clearly, the following describes the drawings required for use in the embodiments of the present invention. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a schematic diagram of a common electrode structure of a two-dimensional planar BDD electrode in the prior art. [Diagram 2] FIG. 1 is a schematic diagram showing the water flow direction and exhaust direction during electrolysis in a two-dimensional planar BDD electrode structure in the prior art. [Diagram 3] 1 is a schematic configuration diagram of a water treatment system according to an embodiment of the present invention. [Figure 4] FIG. 1 is a schematic diagram of an electrolysis module of an electrolysis assembly according to one embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic diagram of the communication end between the branched water inlet guide pipe and the cavity of the water flow guide module of the electrolysis assembly according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] In order to clarify the objectives, technical means and advantages of the present invention, each aspect of the present invention will be described in detail below with reference to specific examples. However, these specific examples are merely for illustrating the present invention as examples, and do not limit the protection scope and substantial content of the present invention.

[0030] An embodiment of the present invention provides an electrolysis assembly and a water treatment system based on a BDD electrode. Figure 3 shows a schematic diagram of the water treatment system of this embodiment, Figure 4 shows a schematic diagram of the electrolysis module of the electrolysis assembly of this embodiment, and Figure 5 shows a schematic diagram of the communication end between the branched water inlet guide pipe and the cavity of the water flow guide module of the electrolysis assembly of this embodiment.

[0031] 3-4, the electrolysis assembly 1 of this embodiment includes a water flow guide module 11 and an electrolysis module 12. The electrolysis module 12 is provided in the water flow guide module 11. The electrolysis module 12 includes a BDD electrode 121, which includes a main body 1211 and a plurality of branch portions 1212 provided on both sides of the main body 1211, and the main body 1211 and the plurality of branch portions 1212 on both sides thereof form a fishbone-shaped structure.

[0032] In this embodiment, the interval between adjacent branch portions 1212 (i.e., the side slit width) is 0.05 mm to 2.5 mm, the width of each branch portion 1212 is 0.05 mm to 10 mm, and the included angle α between each branch portion 1212 and the main body portion 1211 toward the tail of the fishbone-shaped structure is 0 to 90°. In this embodiment, the fishbone-shaped structure resembles a fishbone structure after removing the head of the fish, the tail of the fishbone-shaped structure is in the direction of the fishtail, and the neck of the fishbone-shaped structure is in the direction away from the fishtail, and the included angle α usually refers to the acute angle between the branch portion 1212 and the main body portion 1211, and the included angle is a maximum of 90° (i.e., the two angles formed between the branch portion 1212 and the main body portion 1211 are equal (both are 90°)).

[0033] In this embodiment, the BDD electrode 121 is manufactured by depositing a boron-doped diamond film on a fishbone-shaped substrate, and the material of the substrate is one selected from titanium, niobium, tantalum, nickel, single crystal silicon, polycrystalline silicon, silicon carbide single crystal, silicon carbide ceramic, silicon nitride single crystal, and silicon nitride ceramic, and the substrate is processed by diamond wire cutting. In this embodiment, after processing the fishbone-shaped substrate by diamond wire cutting, the substrate is put into a concentrated suspension of diamond fine powder and ultrasonically treated, and the diamond fine powder is collided with the surface of the substrate by ultrasonic waves to perform surface treatment and increase the surface area, and then a boron-doped diamond film with a thickness of 0.5 to 100 μm is deposited to obtain a fishbone-shaped BDD electrode.

[0034] In the embodiment of the present invention, the BDD electrode 121 includes an anode BDD electrode and a cathode BDD electrode, and an ion membrane 122 is provided between the anode BDD electrode and the cathode BDD electrode. Which of the BDD electrodes on both the upper and lower sides of the ion membrane 122 is the anode and which is the cathode is not shown, but the anode and the cathode are determined based on the connection method between the BDD electrode and the positive and negative electrodes of an external battery (located outside the cavity 112 and not shown).

[0035] In this embodiment, the water flow guide module 11 includes a main water inlet guide pipe 111, a cavity 112 that communicates with the main water inlet guide pipe 111 and has a side perpendicular to the main water inlet guide pipe 111, and a branch water inlet guide pipe 113 that communicates with the cavity 112 and the main water inlet guide pipe 111 and has a communication end with the cavity 112 perpendicular to the upper and lower surfaces of the cavity 112. In this embodiment, the electrolysis module 12 is installed in the cavity 112 and is parallel to the upper and lower surfaces of the cavity 112, and the BDD electrode 121 with a fishbone structure has a tail away from the main water inlet guide pipe 111 and a neck toward the main water inlet guide pipe 111 (that is, as shown in FIG. 4, the direction from the neck to the tail of the BDD electrode 121 with a fishbone structure coincides with the direction of the main water flow formed by the main water inlet guide pipe 111).

[0036] In this embodiment, the pipe diameter ratio between branch water inlet guide pipe 113 and main water inlet guide pipe 111 is 1:1 to 1:20. The water flow of branch water inlet guide pipe 113 is controlled by switch 1131 having pulse control characteristics.

[0037] In this embodiment, as shown in Fig. 5, the end of the branched water inlet guide pipe 113 communicating with the cavity 112 (i.e., the communicating end) is a circular pipe, a duckbill or a separate structure, preferably a separate structure. In this embodiment, the separate structure includes multiple branch pipes, each of which corresponds to one side slit, which provides better slit flushing effect and higher gas discharge efficiency.

[0038] As shown in Fig. 3, the water treatment system of this embodiment includes an electrolysis assembly 1 of this embodiment. The water treatment system of this embodiment further includes a filtration assembly 2 and a gas-liquid mixing assembly 3, and the electrolysis assembly 1 is located between the filtration assembly 2 and the gas-liquid mixing assembly 3, and communicates with the filtration assembly 2 through a water inlet passage 4 and with the gas-liquid mixing assembly 3 through a water outlet passage 5.

[0039] In this embodiment, the filtration assembly 2 is a filtration assembly with a backwash function, and the pore size of the filtration membrane 21 is 0.2 to 75 μm. The gas-liquid mixing method of the gas-liquid mixing assembly 3 uses micropore aeration and / or spiral gas mixing. The ratio of the cross-sectional area of ​​the water inlet passage 4 between the filtration assembly 2 and the electrolysis assembly 1 to the cross-sectional area of ​​the water outlet passage 5 between the electrolysis assembly 1 and the gas-liquid mixing assembly 3 is 1:3 to 20:1.

[0040] The operation process of the water treatment system of this embodiment is as follows: Water to be treated is introduced into the filtration assembly 2, and the water filtered by the filtration assembly 2 passes through the water inlet passage 4 and enters the main water inlet guide pipe 111 and the branch water inlet guide pipe 113 (a switch 1131 is provided in the branch water inlet guide pipe 113, so that the opening and closing of the branch water inlet guide pipe 113 and the amount of water flow in the branch water inlet guide pipe 113 can be controlled as required), and then enters the cavity 112, where the electrolysis module 12 in the cavity 112 electrolyzes the water using the energy of an external battery (located outside the cavity 112, not shown) (during electrolysis, calcium, magnesium, etc. in the water are generally absorbed on the surface of the cathode). ions are easily accumulated, and the anode is easily corroded electrochemically. In this embodiment, the circuit control is used to reverse the positive and negative poles of the battery after a certain period of time, so as to exchange the cathode and anode of the electrolysis module, so that the original cathode becomes the anode, and the original anode becomes the cathode, and the deposition layer deposited on the original cathode is reversed to become the anode and then removed, further reducing the probability of being clogged with particulate matter, extending the service life of the electrodes, and improving the electrolysis efficiency. The water after electrolysis flows out of the cavity 112 through the water outlet passage 5 and enters the gas-liquid mixing assembly 3, and the gas-liquid mixing assembly 3 thoroughly mixes the ozone generated by the electrolysis reaction with the water.

[0041] Although the present invention has been described above with reference to specific embodiments, these specific embodiments are merely illustrative and do not limit the scope of protection of the present invention, and those skilled in the art may make various modifications, changes, or substitutions without departing from the spirit of the present invention. Therefore, various equivalent changes made based on the present invention belong to the scope of the present invention. [Explanation of symbols]

[0042] 1 Electrolytic Assembly 2. Filtration Assembly 3. Gas-liquid mixing assembly 4. Water Entry Passage 5 Water passageway 11 Water flow guide module 12 Electrolysis Module 21 Filtration membrane 111 Main water inlet guide pipe 112 Cavity 113 Branch water inlet guide pipe 121 BDD electrode 122 Ionic Membrane 1131 Switch 1211 Main body 1212 Branch

Claims

1. An electrolysis assembly based on a BDD electrode, comprising a water flow guiding module and an electrolysis module, The electrolysis module is disposed in a water flow guide module; The electrolysis module includes a BDD electrode, the BDD electrode including a main body and a plurality of branch portions provided on both sides of the main body, the main body and the plurality of branch portions on both sides of the main body forming a fishbone-shaped structure; The water flow guide module includes a main water inlet guide pipe, a cavity that communicates with the main water inlet guide pipe and has a side perpendicular to the main water inlet guide pipe, and a branch water inlet guide pipe that communicates with the cavity and the main water inlet guide pipe and has a communication end with the cavity perpendicular to the upper and lower surfaces of the cavity; The electrolysis assembly, characterized in that the electrolysis module is installed in the cavity and is parallel to the upper and lower surfaces of the cavity, and the tail of the fishbone-shaped BDD electrode is separated from the main water inlet guide tube.

2. 2. The electrolytic assembly of claim 1, wherein a spacing between adjacent branches is 0.05 mm to 2.5 mm, a width of each branch is 0.05 mm to 10 mm, and an included angle between each branch and the body toward the tail of the fishbone-like structure is 0 to 90°.

3. 2. The electrolytic assembly according to claim 1, wherein the BDD electrode is manufactured by depositing a boron-doped diamond film on a substrate having a fishbone structure, the material of the substrate is one selected from titanium, niobium, tantalum, nickel, single crystal silicon, polycrystalline silicon, silicon carbide single crystal, silicon carbide ceramic, silicon nitride single crystal, and silicon nitride ceramic, and the substrate is processed by a diamond wire cutting method.

4. 2. The electrolysis assembly of claim 1, wherein the BDD electrodes include an anode BDD electrode and a cathode BDD electrode, and an ionic membrane is provided between the anode BDD electrode and the cathode BDD electrode.

5. 2. The electrolysis assembly according to claim 1, wherein a pipe diameter ratio between the branch water inlet guide pipe and the main water inlet guide pipe is 1:1 to 1:

20.

6. 2. The electrolysis assembly according to claim 1, wherein the water flow of the branched water inlet guide pipe is controlled by a switch having a pulse control characteristic.

7. 2. The electrolysis assembly according to claim 1, wherein the end of the branched water inlet guide pipe communicating with the cavity is of a circular tube type, a duckbill type or a liquid-separating type structure.

8. 8. A water treatment system comprising the electrolysis assembly according to claim 1, further comprising a filtration assembly and a gas-liquid mixing assembly, wherein the electrolysis assembly is located between the filtration assembly and the gas-liquid mixing assembly, and communicates with the filtration assembly via a water inlet passage and communicates with the gas-liquid mixing assembly via a water outlet passage.

9. The filtration assembly is a filtration assembly having a backwash function, and the pore size of the filtration membrane is 0.2 to 75 μm; The gas-liquid mixing assembly uses micro-hole aeration and / or spiral gas mixing as its gas-liquid mixing method; 9. The water treatment system of claim 8, wherein a ratio of a cross-sectional area of ​​the inlet passage between the filtration assembly and the electrolysis assembly to a cross-sectional area of ​​the outlet passage between the electrolysis assembly and the gas-liquid mixing assembly is 1:3 to 20:1.

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