Water-lifting aeration denitrification algal inhibition device and method based on in-situ electrolysis hydrogen evolution

Abstract

According to the device and method, a plurality of in-situ electrolysis hydrogen desorption devices are distributed in a denitrification and algae inhibition device body, an aeration device is arranged on the lower portion of the denitrification and algae inhibition device body, and watertight bins are arranged on the periphery of the top and the periphery of the middle of the denitrification and algae inhibition device body respectively; the in-situ electrolysis hydrogen desorption device comprises a drainage water distribution chamber and an in-situ electrolysis hydrogen desorption area connected to an external circuit, the in-situ electrolysis hydrogen desorption area comprises an anode carbon rod and a plurality of stainless steel wire net cathode layers distributed on the periphery of the anode carbon rod up and down, and an activated carbon layer is arranged above the stainless steel wire net cathode layers; the aeration device is used for oxygenating aerobic bacteria in the water inlet of the denitrification and algal inhibition device body, and the water body entering the in-situ electrolysis hydrogen desorption device is subjected to electrochemical reaction in the in-situ electrolysis hydrogen desorption area, so that hydrogen autotrophic denitrification is carried out, and efficient removal of nitrate nitrogen is realized. According to the invention, the in-situ electrolysis hydrogen desorption device is introduced, and the bioelectrochemical reaction is combined, so that efficient nitrogen removal and algae inhibition effects are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen autotrophic denitrification and water eutrophication control, and particularly to a device and method for denitrification and algae inhibition by pumping water and aerating based on in-situ electrolytic hydrogen production. Background Art

[0002] The problem of excessive nitrogen in reservoir water bodies is becoming increasingly serious. Especially the accumulation of nitrate (NO 3 - -N) and nitrite (NO 2 - -N) often leads to water eutrophication problems and algal blooms. This not only affects the water supply quality but also threatens the balance of the ecosystem. Reservoir water bodies are generally poor in nutrients and have a low carbon-nitrogen ratio (C / N), which poses a great challenge to traditional denitrification technologies that rely on organic carbon sources. How to achieve efficient denitrification under low C / N conditions while controlling algal growth has become a key issue in reservoir water body treatment.

[0003] Currently, traditional denitrification methods mainly rely on biological denitrification and physicochemical methods. Traditional water pumping aerators increase the dissolved oxygen in the water body by mechanical water pumping, effectively alleviating the obstruction of oxygen transfer caused by reservoir stratification. However, they have significant deficiencies in nitrogen removal and algae inhibition, especially in the treatment efficiency of low C / N water bodies. Moreover, these methods usually require a high organic carbon source as an electron donor to effectively carry out denitrification. In water bodies with low organic carbon sources, the efficiency of these methods is significantly reduced.

[0004] Therefore, it has become an urgent task to provide a new technology that does not rely on external organic carbon sources and can achieve efficient denitrification under low C / N conditions. Summary of the Invention

[0005] To solve the above-mentioned defects in the prior art, the purpose of the present invention is to provide a device and method for denitrification and algae inhibition by pumping water and aerating based on in-situ electrolytic hydrogen production, which can efficiently remove nitrate nitrogen in low C / N reservoirs and lake water bodies and inhibit the reproduction of algae. It has the advantages of significant denitrification effect, simple operation, and low energy consumption, and is applicable to the technical field of hydrogen autotrophic denitrification and water eutrophication control.

[0006] The present invention is realized through the following technical solutions.

[0007] One aspect of the present invention provides a device for denitrification and algae inhibition by pumping water and aerating based on in-situ electrolytic hydrogen production, including the main body of the denitrification and algae inhibition device, in which several in-situ electrolytic hydrogen production devices are distributed; water-tight bins are respectively arranged on the outer periphery of the top and middle parts of the main body of the denitrification and algae inhibition device, and an aeration device connected to a gas supply pipe is arranged at the lower part;

[0008] The in-situ electrolytic hydrogen production device includes a drainage and water distribution chamber and an in-situ electrolytic hydrogen production area connected to an external circuit. The in-situ electrolytic hydrogen production area includes an anode carbon rod and a number of stainless steel wire mesh cathode layers distributed above and below the outer periphery of the anode carbon rod. An activated carbon layer is provided above the stainless steel wire mesh cathode layer;

[0009] Oxygen is supplied to the aerobic bacteria in the denitrification and algae inhibition device body through an aeration device. The water body entering the in-situ electrolytic hydrogen production device undergoes an electrochemical reaction in the in-situ electrolytic hydrogen production area to carry out hydrogen autotrophic denitrification, achieving efficient removal of nitrate nitrogen.

[0010] Preferably, the in-situ electrolytic hydrogen production devices are connected in series from bottom to top.

[0011] Preferably, the denitrification and algae inhibition device body is connected by a fixing cylinder and a rising cylinder through a locking bolt.

[0012] Preferably, a second watertight bin is provided at the top of the rising cylinder of the denitrification and algae inhibition device body, and a first watertight bin is provided on the outer periphery of the fixing cylinder.

[0013] Preferably, the end of the air supply pipe is connected to the aeration device through an air release pipe.

[0014] Preferably, the drainage and water distribution chamber and the in-situ electrolytic hydrogen production area, and the in-situ electrolytic hydrogen production area and the activated carbon layer are separated by a water distribution baffle.

[0015] Preferably, the bottom of the drainage and water distribution chamber is provided with water inlet holes; the water distribution baffle is composed of a perforated plexiglass plate.

[0016] Preferably, the anode carbon rod is wrapped with a plexiglass sleeve and placed in the center of the in-situ electrolytic hydrogen production area.

[0017] Preferably, the aeration device includes an aeration chamber and an air chamber. Overflow plates and baffle plates fixed on the side wall of the denitrification and algae inhibition device body are respectively provided above and below the aeration chamber. A water seal plate is provided inside the overflow plate, and air inlet holes are opened on the side wall of the denitrification and algae inhibition device body corresponding to the water seal plate and the baffle plate.

[0018] In one aspect of the present invention, a method for denitrification and algae inhibition by pumping water and aeration using the denitrification and algae inhibition device based on in-situ electrolytic hydrogen production is provided, including:

[0019] Air is introduced into the aeration chamber of the denitrification and algae inhibition device body, and the poor-nutrient water body at the bottom layer of the reservoir is introduced into the denitrification and algae inhibition device body, and the air-water ratio is controlled to be 1:5 to 1:10;

[0020] Electricity is supplied to the anode carbon rod and the stainless steel wire mesh cathode layer of the in-situ electrolytic hydrogen production device;

[0021] The influent water enters the diversion and water distribution chamber and the in-situ electrolytic hydrogen production device of the first-stage denitrification and algae inhibition main device in sequence. The sewage source water body enters the in-situ electrolytic hydrogen production area and contacts the stainless steel wire mesh cathode layer, and hydrogen gas is electrolytically produced. The activated carbon layer above the stainless steel wire mesh cathode layer adsorbs the microorganisms in the sewage source water body on the activated carbon, adsorbing and intercepting pollutants.

[0022] The in-situ electrolytic hydrogen production devices at all levels arranged in the denitrification and algae inhibition device main body at fixed intervals sequentially carry out multi-stage hydrogen evolution, adsorb and intercept pollutants, and cooperate to deodorize and inhibit algae.

[0023] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0024] 1. The present invention produces hydrogen by electrolyzing water, uses hydrogen autotrophic denitrifying bacteria for deep denitrification, and combines with the characteristics of the water body stratification period, and uses a water-lifting aeration device to inhibit the growth of algae. It is suitable for solving the problems of excessive total nitrogen and eutrophication in various reservoir water sources with low C / N ratios, and has the advantages of high denitrification efficiency and remarkable algae inhibition effect.

[0025] 2. The present invention uses a stainless steel wire mesh as the cathode and a carbon rod as the anode based on the biofilm electrode technology. Hydrogen gas is generated by electrolyzing water at the cathode, and hydrogen gas is used as an electron donor to promote the reduction of nitrate to nitrogen gas (N 2 ) by hydrogen autotrophic denitrifying bacteria, thus realizing efficient denitrification. Among them, the electrochemical reaction directly interferes with algal cells through current and electric field, and also has a direct inhibitory effect on algal reproduction.

[0026] 3. According to the characteristics of the water source reservoir, the present invention uses a water-lifting aeration system to break the thermal stratification phenomenon of the water source reservoir, increase the dissolved oxygen in the water body, realize the water body exchange between the isothermal layer, the thermocline and the variable temperature layer, avoid the release of pollutants from the reservoir bottom mud caused by too low dissolved oxygen in the lower layer of the water body, and inhibit the growth and reproduction of bromine-producing algae, so as to further inhibit the growth of algae while realizing an aerobic denitrification environment.

[0027] 4. According to the characteristics of the oligotrophic water source reservoir and the low conventional denitrification rate, the present invention introduces activated carbon as a biofilm carrier and also as a particle electrode. The microbial film growing on the surface of the activated carbon provides an attachment and growth environment for microorganisms, and its high specific surface area can effectively absorb nutrients such as nitrogen and phosphorus in the water, inhibiting the growth of algae. It also promotes the reduction of nitrate through electrochemical reactions, and the good conductivity of activated carbon also makes up for the problems of low conductivity of the reservoir water body and poor current utilization efficiency.

[0028] 5. By configuring solar power supply, the system makes full use of renewable energy, making the entire denitrification process more environmentally friendly and economical, especially suitable for the long-term treatment of low C / N reservoirs and lake water bodies. Brief Description of the Drawings

[0029] The accompanying drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and do not constitute an improper limitation to the present invention. In the drawings:

[0030] Figure 1 It is a schematic structural diagram of the device and method for nitrogen removal, algae inhibition and water pumping and aeration based on in-situ electrolytic hydrogen evolution according to an embodiment of the present invention.

[0031] Explanation of reference numerals: Explanation of reference numerals: 1 - gas supply pipe, 2 - main body of the nitrogen removal and algae inhibition device, 3 - water seal plate, 4 - baffle plate, 5 - anchor pier, 6 - air release pipe, 7 - aeration chamber, 8 - overflow plate, 9 - aeration device, 10 - first watertight bin, 11 - rising cylinder, 12 - locking bolt, 13 - assembled fixing bolt, 14 - in-situ electrolytic hydrogen evolution device, 15 - second watertight bin, 16 - anode carbon rod, 17 - activated carbon layer, 18 - upper water distribution baffle, 19 - stainless steel wire mesh cathode layer, 20 - lower water distribution baffle, 21 - diversion water distribution chamber. Detailed implementation manners

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Here, the schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not limit the present invention.

[0033] Embodiment 1

[0034] As Figure 1 shown, the device for nitrogen removal, algae inhibition and water pumping and aeration based on in-situ electrolytic hydrogen evolution provided in this embodiment includes the main body 2 of the nitrogen removal and algae inhibition device arranged on the anchor pier 5. The main body 2 of the nitrogen removal and algae inhibition device is composed of a fixed cylinder and a rising cylinder 11 connected by a locking bolt 12. A second watertight bin 15 is arranged at the top of the rising cylinder 11, and a first watertight bin 10 is arranged on the outer periphery of the fixed cylinder. The first watertight bin 10 is a hollow floating cylinder, which is used to provide buoyancy to ensure that the water pumping and aeration device is vertically suspended in water, making the whole device more stable; the second watertight bin 15 ensures more uniform water discharge to the surrounding, resulting in a higher diffusion and mixing degree of the reservoir water body.

[0035] The in-situ electrolytic hydrogen evolution devices 14 are distributed up and down in the main body 2 of the nitrogen removal and algae inhibition device. The in-situ electrolytic hydrogen evolution devices 14 are fixed on the inner wall of the main body 2 of the nitrogen removal and algae inhibition device through assembled fixing bolts 13. Each in-situ electrolytic hydrogen evolution device 14 is connected in series from bottom to top. An aeration device 9 is also arranged on the outer periphery of the lower part of the algae inhibition device main body 2. The lower part of the aeration device 9 is connected to the gas supply pipe 1, and an air release pipe 6 is arranged at the end of the gas supply pipe 1 and connected to the aeration device 9.

[0036] Among them, the in-situ electrolytic hydrogen production device 14 includes a lower drainage and water distribution chamber 21 and an in-situ electrolytic hydrogen production area connected to an external circuit. The bottom of the water inlet chamber has holes. There was originally a lower water distribution baffle 20 above the drainage and water distribution chamber 21. Above the lower water distribution baffle 20 is the in-situ electrolytic hydrogen production area, which includes vertically distributed anode carbon rods 16. After the anode carbon rods 16 are wrapped with plexiglass sleeves, they are placed in the center of the in-situ electrolytic hydrogen production area. There are several stainless steel wire mesh cathode layers 19 distributed up and down on the outer periphery of the anode carbon rods 16. Above the stainless steel wire mesh cathode layers 19 is an activated carbon layer 17 separated by an upper water distribution baffle 18.

[0037] A stainless steel wire ball is used as the cathode and a carbon rod is used as the anode for in-situ electrolytic hydrogen production reaction. By setting the water distribution baffle, uniform water distribution of the incoming water below is achieved, and the upper activated carbon particles are prevented from falling into the lower layer. The water distribution baffle is formed by a perforated plexiglass plate to prevent the upper activated carbon particles from falling into the lower cathode.

[0038] The system can also collect sunlight through solar panels and convert it into electrical energy to supply the electrolytic water device to continuously carry out electrolytic water hydrogen production reaction. The device of the present invention is used to break the stratification structure of the reservoir water body, and at the same time provide appropriate dissolved oxygen and an electrochemical environment to synergistically inhibit the growth of algae.

[0039] The in-situ electrolytic hydrogen production device of the present invention forms an in-situ electrolytic hydrogen production area. Based on the biofilm electrode technology, stainless steel wire mesh is used as the cathode and carbon rods are used as the anode. Hydrogen is generated by the cathode through electrolyzing water. Hydrogen is used as an electron donor to promote hydrogen autotrophic denitrifying bacteria, thereby achieving efficient denitrification. Among them, the electrochemical reaction directly interferes with algal cells through current and electric field, and also has a direct inhibitory effect on algal reproduction. When introducing activated carbon as a biofilm carrier and also as a particle electrode, the high specific surface area of activated carbon provides an environment for microorganisms to attach and grow. Moreover, the good conductivity of activated carbon also makes up for the problems of low conductivity of reservoir water and poor current utilization efficiency. The microbial film growing on the surface of activated carbon can not only effectively absorb nutrients such as nitrogen and phosphorus in water and inhibit the growth of algae, but also promote the reduction of nitrate through electrochemical reactions. Moreover, the good conductivity of activated carbon also makes up for the problems of low conductivity of reservoir water and poor current utilization efficiency. During operation, a small amount of iron will be precipitated from stainless steel, and the iron and activated carbon will form iron-carbon micro-electrolysis, accelerating electron transfer and forming a synergistic effect with hydrogen autotrophic denitrification.

[0040] During operation, a small amount of iron will be precipitated from the stainless steel wire mesh, and the iron and activated carbon will form iron-carbon micro-electrolysis, accelerating electron transfer and forming a synergistic effect with hydrogen autotrophic denitrification. Therefore, the entire system drives the electrolysis of the stainless steel wire mesh cathode to produce hydrogen through solar energy and combines it with microbial electrochemical reactions to achieve efficient denitrification and algae inhibition effects.

[0041] Example 2

[0042] The second embodiment of the present invention is based on the previous embodiment. The difference is that in order to better target aeration devices with different structures and better control the aeration effect, thereby improving adaptability.

[0043] Specifically, the bottom of the aeration device 9 is an aeration chamber 7. An overflow plate 8 and a baffle plate 4 fixed to the side wall of the denitrification and algae inhibition device body 2 are respectively provided above and below the aeration chamber 7. A water seal plate 3 is provided inside the overflow plate 8, and air inlet holes are opened on the side wall of the denitrification and algae inhibition device body 2 corresponding to the water seal plate 3 and the baffle plate 4.

[0044] The aeration device 9 uses the overflow plate 8 and the baffle plate 4. A large amount of aerated influent with gas enters the denitrification and algae inhibition device body 2 through the baffle plate 4. A small amount of gas enters the gas chamber at the top of the aeration device 9, and part of the gas enters the denitrification and algae inhibition device body 2 through the air inlet holes inside the water seal plate 3, further disturbing the influent entering the denitrification and algae inhibition device body 2.

[0045] The action mechanism of the present invention's in-situ electrolytic hydrogen evolution pumping aeration denitrification and algae inhibition device is as follows:

[0046] According to the biofilm electrode technology, the stainless steel wire mesh layer is used as the cathode and the carbon rod is used as the anode. Hydrogen is generated by electrolyzing water at the cathode. Hydrogen serves as an electron donor to promote the hydrogen autotrophic denitrifying bacteria to reduce nitrate to nitrogen (N 2 ), thereby achieving efficient denitrification. Among them, the electrochemical reaction directly interferes with algal cells through current and electric field, and also has a direct inhibitory effect on algal reproduction. The addition of the pumping aeration system disrupts the stratification structure of the reservoir, increases the dissolved oxygen in the water body, realizes aerobic denitrification while further inhibiting algal growth. In addition, the present invention also introduces activated carbon as a biofilm carrier and also as a particle electrode. The high specific surface area of activated carbon provides an attachment and growth environment for microorganisms. The microbial film growing on the surface of activated carbon can not only effectively absorb nutrients such as nitrogen and phosphorus in the water and inhibit the growth of algae, but also promote the reduction of nitrate through electrochemical reactions. Moreover, the good conductivity of activated carbon also makes up for the problems of low conductivity of the reservoir water body and poor current utilization efficiency. During operation, a small amount of iron will be precipitated from the stainless steel, and the iron and activated carbon form a micro-electrolysis of iron-carbon, accelerating electron transfer and forming a synergistic effect with hydrogen autotrophic denitrification. Therefore, the entire system drives the stainless steel wire mesh cathode to electrolyze hydrogen by solar energy and combines it with the microbial electrochemical reaction to achieve efficient denitrification and algae inhibition effects.

[0047] The embodiment of the present invention further provides a method for in-situ electrolytic hydrogen evolution pumping aeration denitrification and algae inhibition, including the following steps:

[0048] Step 1: Air is introduced into the aeration chamber 7 at the lower part of the denitrification and algae inhibition device body 2 through the air supply pipe 1. The oligotrophic water body with low dissolved oxygen, nitrogen, and pollutants at the bottom of the reservoir is lifted into the denitrification and algae inhibition device body 2 by the water-air lift. The size of the ventilation volume also determines the size of the influent flow rate to achieve stable influent. Usually, the air-water ratio is controlled at 1:5 - 1:10.

[0049] Step 2: Electric current is applied to the anode carbon rod 16 and the stainless steel wire mesh cathode layer 19 of the in-situ electrolytic hydrogen production device 14, which can be powered by a solar energy system.

[0050] Step 3: The influent enters the diversion and water distribution chamber and the in-situ electrolytic hydrogen production device 14 of the first-stage denitrification and algae inhibition device body 2 in sequence. The sewage source water body enters the in-situ electrolytic hydrogen production area and contacts the stainless steel wire mesh cathode layer 19 to electrolyze hydrogen; the activated carbon layer 17 above the stainless steel wire mesh cathode layer 19 adsorbs the microorganisms in the sewage source water body on the activated carbon and further adsorbs and intercepts pollutants.

[0051] Hydrogen, as a green energy source, can provide an electron donor for the removal of nitrates. The carbon rod with good electrical conductivity, as the anode, can continuously generate hydrogen with the cathode area. The activated carbon layer above the cathode can not only adsorb and intercept pollutants but also become a carrier for aerobic denitrifying microorganisms, providing a living place for the growth and development of aerobic denitrifying microorganisms, greatly improving the aerobic denitrification reaction and accelerating the removal of pollutants such as N and P from the sewage source water body.

[0052] Step 4: The in-situ electrolytic hydrogen production devices 14 arranged at fixed intervals in the denitrification and algae inhibition device body 2 sequentially carry out multi-stage hydrogen evolution, adsorb and intercept pollutants, and cooperate in deodorization and algae inhibition.

[0053] To adapt to reservoirs with different water depths, the rising cylinder and the fixed cylinder can be adjusted according to the actual water depth, and the locking bolt is fixed according to the adjusted height.

[0054] The effects of the present invention are further illustrated below by simulating a pumping aeration denitrification and algae inhibition device based on in-situ electrolytic hydrogen production in the laboratory.

[0055] When the voltage applied between the carbon rod and the stainless steel wire mesh is 8V and the operation lasts for 8 days, the nitrate nitrogen concentration drops from 1.44 mg / L to an undetectable level (<0.5 mg / L), and the maximum denitrification rate of the system can reach 0.29 mg / (L·d). -1。The ammonia nitrogen concentration decreased from 0.61 mg / L to 0.04 mg / L, with obvious removal efficiency, indicating that ammonia nitrogen might be first oxidized to nitrate and then removed through the hydrogen autotrophic denitrification process. No accumulation of nitrite was observed during the test, indicating that no intermediate product nitrite was produced during the reduction of nitrate, and the system reaction directly converted nitrate into nitrogen. The removal rate of total nitrogen (TN) reached 87.9%, and the total nitrogen concentration decreased from 1.75 mg / L to 0.21 mg / L, meeting the Class II surface water quality standard in China (≤0.5 mg / L). Among them, the COD Mn concentration decreased by 55.2% in the system, indicating that the anodic oxidation in the system also played a role in the degradation of organic matter.

[0056] In this embodiment, through the detection of operation data for 12 days, it was found that the device had excellent denitrification effect, and there was also a synergistic effect in the removal of pollutants such as COD Mn . The abundance of microorganisms growing in the activated carbon layer, such as Alicycliphilus (46.3%) and Acidovorax (26.5%), increased significantly as detected by high-throughput data. In addition, the algae inhibition effect in the system was significant, and the algae inhibition efficiency could reach 70%, and the transparency of the water body increased significantly.

[0057] The present invention can efficiently remove nitrate nitrogen in low C / N reservoirs and lake waters and inhibit the reproduction of algae. It has the advantages of significant denitrification effect, simple operation and low energy consumption, and is applicable to the technical fields of hydrogen autotrophic denitrification and water eutrophication control.

[0058] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations of some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen, characterized in that: The denitrification and algae inhibition device comprises a denitrification and algae inhibition device body (2), wherein a plurality of in-situ electrolytic hydrogen decomposition devices (14) are distributed inside the denitrification and algae inhibition device body (2); a watertight compartment is respectively arranged at the top and the middle outer periphery of the denitrification and algae inhibition device body (2), and an aeration device (9) connected to the air supply pipe (1) is arranged at the bottom; The in-situ electrolytic hydrogen decomposition device (14) comprises a drainage water distribution chamber (21) and an in-situ electrolytic hydrogen decomposition zone connected to an external circuit, the in-situ electrolytic hydrogen decomposition zone comprising an anode carbon rod (16) and a plurality of stainless steel wire mesh cathode layers (19) distributed above and below the periphery of the anode carbon rod (16), and an activated carbon layer (17) is provided above the stainless steel wire mesh cathode layer (19); The aeration device (9) is used to oxygenate the water entering the denitrification and algae inhibition device body (2) with aerobic bacteria, and the water entering the in-situ electrolysis hydrogenation device (14) undergoes an electrochemical reaction in the in-situ electrolysis hydrogenation zone to perform hydrogen autotrophic denitrification, thereby achieving efficient removal of nitrate nitrogen.

2. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1 is characterized in that: The in-situ electrolytic hydrogen decomposition devices (14) are connected in series from bottom to top.

3. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1 is characterized in that: The denitrification and algae inhibition device body (2) is composed of a fixed cylinder and a rising cylinder (11) connected by a locking bolt (12).

4. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 3 is characterized in that: A second watertight chamber (15) is provided on the top of the ascending cylinder (11) of the denitrification and algae inhibition device body (2), and a first watertight chamber (10) is provided on the outer periphery of the fixed cylinder.

5. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1 is characterized in that: The end of the air supply pipe (1) is connected to the aeration device (9) through the air release pipe (6).

6. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1 is characterized in that: The drainage water distribution chamber (21) and the in-situ electrolytic hydrogen decomposition zone, and the in-situ electrolytic hydrogen decomposition zone and the activated carbon layer (17) are separated by water distribution baffles.

7. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 6 is characterized in that: The bottom of the drainage and water distribution chamber (21) is provided with a water inlet hole; the water distribution baffle (18) is composed of a perforated organic glass plate.

8. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1 is characterized in that: The anode carbon rod (16) is wrapped with a plexiglass sleeve and placed in the center of the in-situ electrolytic hydrogen decomposition zone.

9. The water pumping aeration denitrification and algae inhibition device based on in-situ electrolysis of hydrogen according to claim 1, characterized in that: The aeration device (9) comprises an aeration chamber (7) and an air chamber. The aeration chamber (7) is provided with an overflow plate (8) and a baffle plate (4) fixed to the side wall of the denitrification and algae inhibition device body (2) at the top and bottom, respectively. A water seal plate (3) is provided inside the overflow plate (8). Air inlet holes are provided on the side wall of the denitrification and algae inhibition device body (2) corresponding to the water seal plate (3) and the baffle plate (4).

10. A method for pumping aeration, denitrification and algae inhibition based on the pumping aeration, denitrification and algae inhibition device for in-situ electrolysis of hydrogen as claimed in any one of claims 1 to 9, characterized in that: include: The air is introduced into the aeration chamber of the denitrification and algae inhibition device, and the oligotrophic water at the bottom of the reservoir is introduced into the denitrification and algae inhibition device, and the air-water ratio is controlled to be 1:5-1:10; Power is supplied to the anode carbon rod and the cathode layer of the stainless steel wire mesh of the in-situ electrolytic hydrogen separation device; The influent water enters the drainage water distribution chamber and the in-situ electrolysis hydrogen device of the first-stage denitrification and algae inhibition device in sequence. The source water of the sewage enters the in-situ electrolysis hydrogen zone and contacts the cathode layer of the stainless steel wire mesh to generate hydrogen by electrolysis. The activated carbon layer above the cathode layer of the stainless steel wire mesh adsorbs the microorganisms of the source water of the sewage onto the activated carbon to adsorb and intercept pollutants. The various in-situ electrolytic hydrogen evolution devices arranged at fixed intervals in the main body of the denitrification and algae inhibition device sequentially perform multi-stage hydrogen evolution, adsorb and intercept pollutants, and synergistically deodorize and inhibit algae.

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