Algae removal system based on anode and cathode electro-adsorption and oxidation to improve algae removal effect

Abstract

The application discloses an algae removal system based on anode and cathode electric adsorption and oxidation to improve the algae removal effect, which comprises a floating structure, an interception net body and a counterweight structure, the floating structure and the counterweight structure are respectively installed at different parts of the interception net body, the interception net body is provided with an anode, a cathode and an insulating interception net, the anode and the cathode are connected through a power supply, the insulating interception net insulates the anode from the cathode, electrolysis is carried out on the water body containing chlorine ions to be treated through the anode and the cathode to generate chlorine gas, and the chlorine gas is dissolved in water to generate hypochlorite. The application is improved through the insulating interception net, the anode and the cathode are arranged, the electric adsorption and electric oxidation are relied on to improve the algae removal effect, self-cleaning and the prolongation of the service life are realized, trace active chlorine is generated in situ, algae in water is removed, the energy consumption is low, the removal effect is good, and there is no secondary pollution. The device has simple structure, low maintenance cost and strong operability, and is suitable for large water surface operation.

Description

Technical Field

[0001] The present invention relates to the technical field of algae density control in lake and sea water bodies, and in particular to an algae removal system based on anode and cathode electrical adsorption and oxidation to enhance algae removal effect. Background Art

[0002] Among the various environmental issues affecting the Earth, algal blooms remain one of the most pressing threats, posing a significant threat to human health and the safety of the biosphere. Large amounts of nutrients containing nitrogen and phosphorus enter water bodies, leading to algal blooms and widespread proliferation, posing a persistent threat to reservoir water supplies.

[0003] During the high algae season, large algae clusters are very likely to form and accumulate at the water intake of the reservoir, which has a great impact on the water plant's process operation and affects normal water supply; some algae metabolites are precursors of disinfection by-products such as trihalomethanes and haloacetic acids. If improper disinfection is carried out, it will lead to excessive production of disinfection by-products; cyanobacteria have toxic secondary metabolites such as algae toxins and odor-causing substances, which affect the safety of drinking water and endanger human health; moreover, excessive algae proliferation will lead to a decrease in dissolved oxygen and transparency in the water, destroying the balance of the water ecosystem.

[0004] Traditional algae removal devices include chemical, biological, and physical methods. Currently, algae removal at water sources mainly relies on physical salvaging and fencing. However, purely physical algae removal processes are slow and inefficient, making it difficult to achieve the desired algae removal effect. Furthermore, physical algae removal devices such as filtration interception nets themselves have certain limitations. For example, polyester fabrics and non-woven fabrics are often used as materials for physical algae removal interception nets, which have short service lives, require frequent replacement, especially during peak algae growth periods, consume a lot of manpower and material resources, and lead to increased costs. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an algae removal system based on anode and cathode electroadsorption and oxidation to enhance the algae removal effect while improving the algae removal efficiency at the water source and extending the service life of the interception net and playing a self-cleaning role.

[0006] The present invention is achieved through the following technical solutions:

[0007] An algae removal system that improves algae removal effects based on cathode and anode electrical adsorption and oxidation includes a floating structure, an interception net main body, and a counterweight structure. The floating structure and the counterweight structure are respectively installed at different positions of the interception net main body. The interception net main body has an anode, a cathode, and an insulating interception net. The anode and the cathode are connected through a power supply. The insulating interception net isolates the anode from the cathode. The anode and the cathode are used to electrolyze the water to be treated containing chloride ions to generate chlorine gas, which dissolves in water to generate hypochlorite.

[0008] As a preferred embodiment, the material of the anode is ruthenium iridium titanium. The ruthenium iridium titanium has the advantages of long service life, low overpotential and high chlorine evolution current efficiency as the anode, thereby having the effect of energy saving.

[0009] As a preferred embodiment, the material of the cathode is iron mesh, titanium mesh or copper mesh.

[0010] As a preferred embodiment, the material of the cathode is titanium mesh. Titanium has excellent corrosion resistance and good corrosion resistance.

[0011] As a preferred embodiment, the insulating interception net is non-woven fabric, nylon cloth or polyester cloth. The non-woven fabric is insulated and porous, and can better insulate.

[0012] As a preferred embodiment, the cathode is wrapped in the insulating interception net, and the anode is fixed outside the insulating interception net. The insulating interception net can play a role of wave dissipation, provide a relatively stable hydrodynamic environment, help to play the role of anode electric adsorption of algae, and can also avoid the short circuit of the device caused by the contact of the anode and the cathode, and ensure safety.

[0013] As a preferred embodiment, the working voltage of the algae removal device is lower than 24V, and the current density is 0-10mA / cm 2 . According to the above structure, very low current density and low voltage can be used, which is safe and reliable, and has a wide range of applications. In addition, since it is set to low voltage and low current density, there is no fouling problem, and the service life of the interception net can be further prolonged.

[0014] As a preferred embodiment, the layout range of the algae removal device is more than 30% of the water depth. The sufficient depth of the algae removal device is beneficial to the removal of algae below the surface of the water body. Algae not only exist in the surface of the water body, but also exist in the bottom of the water body.

[0015] As a preferred embodiment, the replacement frequency of the algae removal device is 10-30 days.

[0016] As a preferred embodiment, the floating structure and the counterweight structure are respectively installed at the top and the bottom of the interception net body, the floating structure adopts a floating ball, and the counterweight structure adopts a lead block.

[0017] The algae removal device and the algae removal system of the present application combine the interception net and the electrochemical mechanism to greatly improve the algae removal efficiency of the water source. The interception net intercepts and removes algae through physical filtration, and the anode and the cathode are arranged to generate a small amount of active chlorine through electrochemical reaction, thereby improving the algae removal efficiency and prolonging the service life of the interception net. The algae removal device has high stability. The algae removal device has the following advantages:

[0018] (1) By using the insulating interception net, algae in water can be removed through filtering interception, and relatively stable water dynamic conditions can be provided;

[0019] (2) The algae interception effect of the algae removal interception net under non-steady water dynamic conditions can be promoted through electric absorption;

[0020] (3) Algae are removed through oxidation, self-cleaning prolongs the service life. Through in-situ generation of trace active chlorine, algae in water are removed, the energy consumption is low, the removal effect is good, and there is no secondary pollution;

[0021] (4) The device structure is simple, the raw material source range is wide, and it is easy to purchase;

[0022] (5) The maintenance cost is low, the operability is strong, it is suitable for large water surface operation, and can be used for intercepting and removing algae in large lake and reservoir water sources. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an algae removal system according to an embodiment of the present application.

[0024] Figure 2 is a top view of an algae removal device according to an embodiment of the present application.

[0025] Figure 3 is a side view of an algae removal device according to an embodiment of the present application.

[0026] Figure 4 is a schematic chart showing the effect of treating algae-containing water using different current densities in the state of a flux of 2 mL / s in the algae removal system according to an embodiment of the present application.

[0027] Figure 5 is a schematic chart showing the effect of treating algae-containing water with different fluxes by the algae removal system according to an embodiment of the present application for 12 h.

[0028] In the drawings, the symbols represent: 1. floating structure; 2. anode; 3. counterweight structure; 4. cable; 5. power supply; 6. insulating interception net; 7. cathode; 10. algae removal device; 11. interception net body; 100. algae removal system. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below with reference to the drawings: The embodiments are implemented on the premise of the technical solutions of the present application, and detailed implementation modes and specific operation processes are given, but the protection scope of the present application is not limited to the following embodiments.

[0030] As Figure 1 , 2, 3, is a schematic diagram showing the general structure of the algae removal system 100 of the first embodiment. The algae removal system 100 is provided with: an algae removal device 10 and a power supply 5. The algae removal device 10 is configured as a one-piece low-voltage electrically controlled algae removal barrier net, and includes a floating structure 1, a barrier net body 11, and a counterweight structure 3.

[0031] The floating structure 1 and the counterweight structure 3 are respectively installed at different parts of the barrier net body 11. In the present embodiment, the floating structure 1 is implemented as a floating ball. The floating ball is provided at intervals, for example, at the top of the barrier net body 11, and uses buoyancy to position one end side of the barrier net body 11 near the water surface. The floating ball can be fixed to the top (one end side) of the barrier net body 11 by a steel wire or the like. The material of the floating ball can be PE or ABS. The bottom of the barrier net body 11 is provided with a bottom-sinking counterweight as the counterweight structure 3, which achieves fixation of the barrier net body 11 in a lake or sea water body. The counterweight structure 3 is provided at intervals, for example, at the bottom (other end side) of the barrier net body 11, and can be implemented, for example, as a lead block.

[0032] The barrier net body 11 has an anode 2, a cathode 7, and an insulating barrier net 6. The anode 2 and the cathode 7 are connected to the power supply 5. The power supply 5 supplies power to the algae removal device 10 and is electrically connected to the anode 2 and the cathode 7 via a cable 4. In the present embodiment, a solar energy storage power supply base station is used as the power supply 5. This solar energy storage power supply base station is provided with a storage box, is connected to the anode and the cathode via a cable, and can adjust the voltage. However, it is not limited thereto, and other known power supplies can also be used.

[0033] The anode 2 and the cathode 7 are isolated by the insulating barrier net 6. In the present embodiment, the cathode 7 is wrapped by the insulating barrier net 6. The anode 2 is fixed to the outside of the insulating barrier net and is isolated from the cathode 7. For example, the material of the anode 2 can be ruthenium, iridium, or titanium. The material of the cathode 7 can be an iron mesh, a titanium mesh, or a copper mesh, and can be, for example, a 10-100 mesh titanium mesh. The insulating barrier net 6 can be implemented as a non-woven fabric, a nylon cloth, or a polyester cloth, and for example, the insulating barrier net 6 is an insulating porous non-woven fabric. In addition, the insulating barrier net 6, the anode 2, and the cathode 7 can also be implemented in other structures. For example, in one example, the barrier net body 11 is composed of a surface layer porous anode 2, a middle layer insulating barrier net 6, and a titanium mesh cathode 7 base. The porous anode and the titanium mesh cathode base are separated by the insulating barrier net 6.

[0034] In addition, the algae removal device 10 can be configured to have a working voltage of less than 24 V and a current density of 0-10 mA / cm 2 .

[0035] In addition, the algae removal device 10 can be configured to be arranged at a water depth greater than 30%, i.e., the algae removal device 10 (mainly the interception net body 11) is arranged at a water depth of 30% or more. The arrangement width of the interception net body 11 can be set according to actual conditions, for example, it can be arranged in a manner of covering the water surface of the water outlet of the water source.

[0036] The replacement frequency of the algae removal device 10 can be 10-30 days. The algae removal device 10 or the interception net body 11 or the insulating interception net 6 can be replaced. For example, in summer, the water body has a high content of algae. Due to physical interception and electric adsorption, a large amount of algae is attached to the algae net, and replacement is required. In winter, in the case of long-time operation, a large amount of algae and silt is attached to the algae net, and replacement is required.

[0037] Specific algae removal process and principle:

[0038] In the algae removal device 10, the water body containing chloride ions to be treated is electrolyzed by the anode 2 and the cathode 7 to produce chlorine, and the chlorine is dissolved in water to generate hypochlorite.

[0039] Specifically, the integrated low-voltage electrically controlled algae removal interception net system (algae removal system 100) is arranged, the water flow passes through the interception net body 11, the porous anode 2 removes the algae in the water by electric adsorption, the anode loses electrons and is positively charged, and most of the algae in the water is negatively charged. The algae are enriched on the surface of the electrode by electric adsorption. The insulating interception net physically intercepts the algae in the water flow. Moreover, the anode electrolysis produces active substances to oxidize and remove the algae. Specifically, the chloride ions in the water are electrolyzed to produce chlorine, and the chlorine is dissolved in water to generate hypochlorite. The hypochlorite has strong oxidizing property and can oxidize and remove the algae in the water.

[0040] Electric oxidation process:

[0041] Anode: 2Cl - -2e - →Cl2 Cl2+H2O→2ClO - +2H +

[0042] Cathode: 2H + +2e - →H2

[0043] The algae removal device of the present disclosure adopts a low-voltage electrically controlled algae removal interception net, which effectively controls the concentration of lake and sea algae through physical interception, electric adsorption and electric oxidation mechanisms. The insulating interception net removes the algae in the water body through filtration and interception, and provides relatively stable hydrodynamic conditions, which is beneficial to the oxidation removal of the algae in the water and improves the algae removal effect. Electric adsorption promotes the algae interception effect of the algae removal interception net under non-steady-state hydrodynamic conditions. Electric oxidation produces active chlorine to reduce the concentration of the algae in the water body, avoid the aggregation of the algae on the surface of the algae net, and thus improve the service life of the algae net.

[0044] Anodic oxidation removes algae in water, and electrochemical adsorption and physical interception effect enriches algae on the surface of the interception net body 11, kills the algae, makes the algae fall off, thereby prolongs the service life of the interception net, and plays a self-cleaning role. At the same time, electro-adsorption relies on the mutual attraction between negatively charged algae and positively charged anodes, strengthens the physical interception effect, and improves the algae removal effect. Electro-adsorption plays a role in strengthening the physical interception effect of the interception net, and electrochemical oxidation plays a role in oxidizing and removing algae and self-cleaning and prolonging the service life.

[0045] The algae removal device and algae removal system of the present disclosure are suitable for large-scale water body algae concentration control, have the advantages of high-efficiency algae control, safe operation (voltage < 24V), low maintenance cost, simple manufacturing process, etc. Compared with the existing physical algae removal interception net, the algae removal device of the present disclosure has better removal effect and longer service life.

[0046] The following further examples are used to illustrate the present application in detail. It should also be understood that the following examples are only used to further illustrate the present application, and cannot be understood as limiting the scope of protection of the present application. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present application are within the scope of protection of the present application. The specific process parameters in the following examples are only one example in the appropriate range, i.e. those skilled in the art can select within the appropriate range according to the description herein, and are not limited to the specific values in the following examples.

[0047] Example 1 (as shown in Figure 3 ):

[0048] The area of the insulation interception net is 1m 2 , the area of the anode is 1m 2 , the area of the cathode is 1m 2 , and the test water 100L with a chlorophyll a concentration of 20μg / L (the chlorophyll a concentration is an important indicator for measuring the concentration of algae in water, and is a reaction of primary productivity) is configured. Connect the cable to the adjustable power supply, set the current, the current density is 0.1mA / cm 2 , use a peristaltic pump to pass the experimental water through the integrated low-voltage electrically-controlled algae removal interception net, the net flux is 2mL / s, use a PE material floating ball, the insulation interception net uses non-woven fabric, use a lead block as a bottom weight, and the removal rate of chlorophyll a concentration reaches 25% in 12h.

[0049] Example 2:

[0050] The area of the insulation interception net is 1m 2 , the area of the anode is 1m 2 , the area of the cathode is 1m 2, the test water 100L with chlorophyll a concentration of 20 μg / L (chlorophyll a concentration is an important index for measuring the concentration of algae in water body and is a reaction of primary productivity) is connected to adjustable power supply through cable, current is set, and current density is 0.5 mA / cm 2 , the experimental water is passed through the integrated low-voltage electrically controlled algae removal interception net through the use of peristaltic pump, the interception flux is 2 mL / s, the floating ball is made of PE material, the insulation interception net is made of non-woven fabric, lead blocks are used as bottom weight, and the removal rate of chlorophyll a concentration reaches 50% in 12 hours.

[0051] Example 3

[0052] The area of the insulation interception net is 1 m 2 , the area of the anode made of ruthenium iridium titanium is 1 m 2 , the area of the cathode made of 100-mesh titanium net is 1 m 2 , the test water 100L with chlorophyll a concentration of 20 μg / L is connected to adjustable power supply through cable, current is set, and current density is 1 mA / cm 2 , the experimental water is passed through the integrated low-voltage electrically controlled algae removal interception net through the use of peristaltic pump, the interception flux is 2 mL / s, the floating ball is made of PE material, the insulation interception net is made of non-woven fabric, lead blocks are used as bottom weight, and the removal rate of chlorophyll a concentration reaches 70% in 12 hours. Figure 5

[0053] Example 4

[0054] The area of the insulation interception net is 1 m 2 , the area of the anode made of ruthenium iridium titanium is 1 m 2 , the area of the cathode made of 100-mesh titanium net is 1 m 2 , the test water 100L with chlorophyll a concentration of 20 μg / L is connected to adjustable power supply through cable, current is set, and current density is 2 mA / cm 2 , the experimental water is passed through the integrated low-voltage electrically controlled algae removal interception net through the use of peristaltic pump, the interception flux is 2 mL / s, the floating ball is made of PE material, the insulation interception net is made of non-woven fabric, lead blocks are used as bottom weight, and the removal rate of chlorophyll a concentration reaches 90% in 12 hours.

[0055] Example 5

[0056] The area of the insulation interception net is 1 m 2 , the area of the anode made of ruthenium iridium titanium is 1 m 2 , the area of the cathode made of 100-mesh titanium net is 1 m 2 , the test water 100L with chlorophyll a concentration of 20 μg / L is connected to adjustable power supply through cable, current is set, and current density is 4 mA / cm 2 ​, the experimental water was passed through the integrated low-voltage electrically controlled algae removal interception net by using a peristaltic pump, the interception net area was 1 m2, the interception net was made of non-woven fabric, lead blocks were used as the bottom weight, the removal rate of chlorophyll a concentration was 99% after 12 hours.

[0057] Example 6 (as shown in Figure 5 ):

[0058] The interception net area was 1 m 2 , the interception net area was 1 m 2 , the interception net area was 1 m 2 , 100 mesh titanium net was used as the cathode, 100 L of experimental water with a chlorophyll a concentration of 20 μg / L was configured, an adjustable power supply was connected through a cable, the current was set, the current density was 1 mA / cm 2 , the experimental water was passed through the integrated low-voltage electrically controlled algae removal interception net by using a peristaltic pump, the interception net area was 1 m 2 , the interception net was made of non-woven fabric, lead blocks were used as the bottom weight, the removal rate of chlorophyll a concentration was 80% after 12 hours. Figure 5

[0059] Example 7:

[0060] The interception net area was 1 m 2 , the interception net area was 1 m 2 , 100 mesh titanium net was used as the cathode, 100 L of experimental water with a chlorophyll a concentration of 20 μg / L was configured, an adjustable power supply was connected through a cable, the current was set, the current density was 1 mA / cm 2 , the experimental water was passed through the integrated low-voltage electrically controlled algae removal interception net by using a peristaltic pump, the interception net area was 1 m 2 , the interception net was made of non-woven fabric, lead blocks were used as the bottom weight, the removal rate of chlorophyll a concentration was 50% after 12 hours. Figure 5

[0061] Example 8:

[0062] The interception net area was 1 m 2 , the interception net area was 1 m 2 , 100 mesh titanium net was used as the cathode, 100 L of experimental water with a chlorophyll a concentration of 20 μg / L was configured, an adjustable power supply was connected through a cable, the current was set, the current density was 2 mA / cm 2 ​​, a peristaltic pump was used to pass the experimental water through the integrated low-voltage electric control algae removal interception net, the net flux was 8mL / s, PE material floating balls were used, the insulation interception net was made of non-woven fabric, and lead blocks were used as sinking weights. The removal rate of chlorophyll a concentration reached 10% in 12 hours ( Figure 5 ).

[0063] The above eight embodiments illustrate that in the algae removal process of the present invention, the greater the current density and the smaller the flux through the network, the better the algae removal effect.

[0064] Comparative Example 1:

[0065] The area of ​​the insulation interception net is 1m 2 , using ruthenium iridium titanium as the anode, with an area of ​​1m 2 , 100 mesh titanium mesh is the cathode, the area is 1m 2 Ultrapure water was used for the test, and 0.1 mol / L sodium sulfate was added (to eliminate the effect of chloride ions and inhibit oxidation), and 100 L of test water with a chlorophyll a concentration of 20 μg / L was prepared. A peristaltic pump was used to pass the experimental water through an integrated low-voltage electric-controlled algae removal interception net with a net flux of 2 mL / s. PE floating balls were used, and the insulating interception net was made of non-woven fabric. Lead blocks were used as bottom weights. The algae in the water were removed by physical interception, and the removal rate of chlorophyll a concentration reached 20% in 12 hours.

[0066] In Comparative Example 1, the power supply was not turned on.

[0067] Comparative Example 2:

[0068] The area of ​​the insulation interception net is 1m 2 , using ruthenium iridium titanium as the anode, with an area of ​​1m 2 , 100 mesh titanium mesh is the cathode, the area is 1m 2 Ultrapure water was used for the test, and 0.1 mol / L sodium sulfate was added. 100 L of test water with a chlorophyll a concentration of 20 μg / L was prepared. The adjustable power supply was connected through a cable, and the current was set to 1 mA / cm 2 A peristaltic pump was used to pass the experimental water through an integrated low-voltage electric-controlled algae removal interception net with a net flux of 2 mL / s. PE floating balls were used, the insulating interception net was made of non-woven fabric, and lead blocks were used as bottom weights. During the experiment, no hydroxyl free radicals were detected by EPR measurement. Algae in the water were removed by physical interception and electrical adsorption, and the removal rate of chlorophyll a concentration reached 24% in 12 hours.

[0069] Comparative Example 3:

[0070] The area of ​​the insulation interception net is 1m 2 , using ruthenium iridium titanium as the anode, with an area of ​​1m 2 , 100 mesh titanium mesh is the cathode, the area is 1m2 The test water uses ultrapure water, 0.1 mol / L sodium sulfate is added, 100 L of test water with a chlorophyll a concentration of 20 μg / L is configured, an adjustable power supply is connected through a cable, the current is set, and the current density is 2 mA / cm 2 The experimental water is passed through the integrated low-voltage electrically controlled algae removal interception net through a peristaltic pump, the interception flux is 2 mL / s, a PE material floating ball is used, the insulation interception net uses non-woven fabric, a lead block is used as a bottom weight, no hydroxyl radicals are detected through epr during the experiment, algae in the water are removed through physical interception and electric adsorption, and the removal rate of the chlorophyll a concentration is 28% in 12 h.

[0071] Comparative Example 4:

[0072] The insulation interception net has an area of 1 m 2 Ruthenium iridium titanium is used as an anode, and the area is 1 m 2 A 100-mesh titanium net is used as a cathode, and the area is 1 m 2 The test water uses ultrapure water, 0.1 mol / L sodium sulfate is added, 100 L of test water with a chlorophyll a concentration of 20 μg / L is configured, an adjustable power supply is connected through a cable, the current is set, and the current density is 4 mA / cm 2 The experimental water is passed through the integrated low-voltage electrically controlled algae removal interception net through a peristaltic pump, the interception flux is 2 mL / s, a PE material floating ball is used, the insulation interception net uses non-woven fabric, a lead block is used as a bottom weight, no hydroxyl radicals are detected through epr during the experiment, algae in the water are removed through physical interception and electric adsorption, and the removal rate of the chlorophyll a concentration is 28% in 12 h.

[0073] Through the above four comparative examples, it is shown that, in the absence of electro-oxidation, the device can improve the algae removal interception effect by relying on electric adsorption.

[0074] In summary, the insulation interception net is improved, anodes and cathodes are arranged, electric adsorption and electro-oxidation are relied on to improve the algae removal effect, the service life of the interception net is prolonged, and the self-cleaning effect is achieved. The insulation interception net filters and intercepts algae, and relatively stable hydrodynamic conditions are formed behind the interception net. Electric adsorption promotes the interception effect of the algae removal interception net under non-steady-state hydrodynamic conditions. The electrochemical mechanism produces active chlorine through electrolysis, and a small amount of active chlorine can be produced at low voltage and low current density to remove algae in water. The insulation interception net and the electrochemical mechanism are combined to remove algae in water in situ, energy consumption is low, speed is fast, and the method has a wide application prospect.

[0075] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for removing algae using an algae removal system that enhances the effect of removing algae based on electrosorption and electrooxidation, characterized by, The algae removal system comprises a floating structure, an intercepting net body and a counterweight structure, the floating structure and the counterweight structure are respectively installed at the top and the bottom of the intercepting net body, the intercepting net body is provided with an anode, a cathode and an insulating intercepting net, the anode and the cathode are connected through a power supply, the insulating intercepting net insulates the anode from the cathode, electrolysis is carried out on the water body to be treated containing chlorine ions through the anode and the cathode to generate chlorine gas, and the chlorine gas is dissolved in water to generate hypochlorite; The material of the anode is ruthenium iridium titanium; The material of the cathode is titanium net; The insulating intercepting net is non-woven fabric, nylon cloth or polyester cloth; The cathode is wrapped in the insulating intercepting net, and the anode is fixed outside the insulating intercepting net, the insulating intercepting net plays a role of wave dissipation, provides a relatively stable water power environment, is conducive to the role of the anode in electrically adsorbing and gathering algae, meanwhile, the contact between the anode and the cathode is avoided to cause short circuit of the device, and safety is ensured; The working voltage of the algae removal system is lower than 24V, and the current density is 1-10 mA / cm 2 ; The algae removal system is arranged in a range of more than 30% of the water depth.

2. The method of claim 1, wherein the method is characterized by, The algae removal system is replaced at a frequency of 10-30 days.

3. The method of claim 1, wherein the method is characterized by, The floating structure adopts a floating ball, and the counterweight structure adopts a lead block.

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