Movable nitrogen and phosphorus removal and algae control integrated device and method

Abstract

The invention discloses a movable nitrogen and phosphorus removal and algae control integrated device and method.The movable nitrogen and phosphorus removal and algae control integrated device comprises an overwater part and an underwater part, the overwater part is divided into an anode biofilm culturing area, a cathode hydrogen production area and a spraying type water distribution area which are arranged on a phosphorus removal and algae control device body from bottom to top, and the anode biofilm culturing area is filled with polyurethane filler and provided with an anode plate; the cathode hydrogen production area is filled with steel wire balls and is provided with a cathode plate, the spraying type water distribution area and the cathode hydrogen production area are separated by adopting a Uv isolation water distribution plate, and an ultraviolet light catalysis algae control device and a photocatalyst which are vertically arranged at an interval are arranged in the spraying type water distribution area; a water outlet pipe is arranged at the bottom of the anode biofilm formation area; the underwater part comprises a hydraulic lifting system communicated with the phosphorus removal and algae control device body, the filtered polluted water is input to the top of the spraying type water distribution area, and the nitrogen and phosphorus removal and algae control process is carried out under the action of spraying, ultraviolet radiation and electrolysis. The device can efficiently remove ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in the urban landscape water body.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen autotrophic denitrification deep denitrification technology and algae control technology, and in particular to the construction of a solar-driven three-dimensional biofilm electrode low C / N landscape water body denitrification, phosphorus removal and algae control device, the mechanism of denitrification and algae control, and its application in the field of hydrogen autotrophic denitrification deep denitrification. At the same time, it combines environmental protection with cultural propaganda to promote the two-way development of the environment and the economy. Background Art

[0002] As part of the ancient city wall's military defense system, the ancient moat has been transformed into an important river for rainwater storage and flood discharge in the city. Usually, the water volume of the moat is replaced once a month, and it is basically in a static state with poor water circulation.

[0003] At present, the problems faced by the moat of ancient buildings are mainly the following two aspects:

[0004] (1) High nutrient salt concentration

[0005] The root cause of algal blooms is the excessively high nutrient concentration in the moat water. Studies generally believe that the boundary conditions for algal blooms are when the total nitrogen (TN) concentration exceeds 0.5 mg / L and the total phosphorus (TP) concentration exceeds 0.02 mg / L, and the N / P ratio is always around 15, which is conducive to the reproduction and growth of algae. Usually in the summer, when the water temperature rises and the rainfall increases, resulting in initial rainwater erosion and pollution, the TN concentration in some sections of the moat reaches 7-8 mg / L and the TP concentration reaches about 1 mg / L, which is far higher than the critical value for algal blooms.

[0006] (2) Single ecosystem and poor water self-purification capacity

[0007] The existing water ecosystem of the moat is single, with few aquatic animals such as fish visible in the river section, fewer aquatic plants in the river section, and ecological floating islands only observed along the coast of some river sections.

[0008] Therefore, the overall idea of ​​water quality management of moat landscape water should be based on the principle of treating pollution first and then treating the source. According to the water quality requirements of moat water body, the water quality of the source should be improved to the extent that it can basically meet the requirements of moat water body. This is the most economical and effective fundamental strategy. Secondly, the moat water body should be changed from a relatively static state to a flowing state as much as possible to enhance the self-purification capacity of the water body. This is the main guarantee for maintaining the good state of the water body and preventing the deterioration of water quality. In addition, it is necessary to build a microbial system to enhance the self-purification and repair ability of the water body, balance the bacterial phase and algae phase in the water body, reduce the degree of eutrophication of the water body, and maintain the stability of water quality indicators.

[0009] Traditional water treatment technologies, such as biological denitrification, addition of chemical agents, aeration and other methods, usually require certain conditions to support them. For example, biological denitrification relies on a high carbon-nitrogen ratio (C / N) condition.

[0010] Therefore, providing a mobile integrated device for denitrification, dephosphorization and algae control that can achieve efficient denitrification and inhibit and kill the growth of free algae cells has become a technical problem that needs to be urgently solved in the current field. Summary of the invention

[0011] In order to solve the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a movable integrated device and method for denitrification, phosphorus removal and algae control. The device is driven by solar energy and takes biofilm electrode hydrogen autotrophic denitrification as the core to remove ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in urban landscape water bodies. It is suitable for denitrification, phosphorus removal and algae control in urban landscape water bodies.

[0012] The present invention is achieved through the following technical solutions.

[0013] In one aspect of the present invention, there is provided a movable integrated device for nitrogen removal, phosphorus removal and algae control, comprising an above-water part and an underwater part;

[0014] The above-water part includes the phosphorus removal and algae control device body, which is divided from bottom to top into an anode film-forming area, a cathode hydrogen production area and a spray water distribution area. The anode film-forming area is filled with polyurethane filler and an anode plate is provided. The cathode hydrogen production area is filled with steel balls and a cathode plate is provided. The spray water distribution area and the cathode hydrogen production area are separated by a UV isolation water distribution plate. An ultraviolet catalytic algae control device and a photocatalyst are provided in the spray water distribution area. A water outlet pipe is provided at the bottom of the anode film-forming area.

[0015] The underwater part includes a hydraulic lifting system connected to the main body of the phosphorus removal and algae control device and a detachable water inlet filtration system. The hydraulic lifting system inputs the filtered polluted water into the top of the spray water distribution area, and carries out the nitrogen removal, phosphorus removal and algae control process under the action of spraying, ultraviolet radiation and electrolysis.

[0016] Preferably, ultraviolet light catalytic algae control devices and BiOBrI@MoS2 photocatalysts are provided in the spray water distribution area at intervals and arranged vertically.

[0017] Preferably, two layers of graphite carbon felt are arranged in the middle of the anode film forming area as the anode plate; and three ruthenium-iridium grid plates are arranged in the cathode hydrogen producing area as the cathode plate.

[0018] Preferably, the water inlet filtration system comprises an upper layer of magnetite filter material and a bottom layer of quartz sand filter material, each having a thickness of 20 to 30 cm.

[0019] Preferably, the bottom of the phosphorus removal and algae control device body is arranged on a mobile floating box, and the hydraulic lifting system is in the mobile floating box.

[0020] Preferably, the circulating pump water pipe of the hydraulic lifting system passes through the center of the anode biofilm forming area and the cathode hydrogen production area, extends to the top of the spray water distribution area and is connected to the spray device.

[0021] Preferably, a flexible LED screen is wrapped on the outside of the phosphorus removal and algae control device body; and an atmospheric reoxygenation vent is provided on the spray water distribution area.

[0022] Preferably, it also includes a solar power supply system connecting the ultraviolet photocatalytic algae control device, the anode plate, the cathode plate, the hydraulic lifting system and the flexible LED screen.

[0023] Another aspect of the present invention provides a method for denitrification, dephosphorization and algae control of the movable integrated denitrification, dephosphorization and algae control device, comprising:

[0024] (a) placing a photocatalyst in the spray water distribution area, filling steel wool in the cathode hydrogen production area, and filling polyurethane filler in the anode film formation area;

[0025] (b) The hydraulic lifting system pumps the polluted water into the phosphorus removal and algae control device through the detachable water inlet filtration system, controls the water flow rate of the hydraulic lifting system 4; controls the inlet ammonia nitrogen concentration, nitrate nitrogen concentration, total nitrogen concentration and COD concentration;

[0026] (c) The filtered water is sent to the top of the spray water distribution area for spraying, ultraviolet irradiation and photocatalysis;

[0027] (d) The solar power supply system 7 supplies power to the anode biofilm forming area 3 and the cathode hydrogen production area 2, electrolyzes the sprayed water, controls the hydraulic retention time of the entire device, and removes nitrogen and phosphorus from the polluted water and controls algae.

[0028] As a preferred embodiment, the water flow rate of the hydraulic lifting system is controlled to be 0.2m / s to 1m / s;

[0029] Control the influent ammonia nitrogen concentration to 1mg / L-2.2mg / L, nitrate nitrogen concentration to 5mg / L-7.1mg / L, total nitrogen concentration to 6mg / L-8.8mg / L, and COD concentration to 1.0mg / L-4.8mg / L;

[0030] The hydraulic retention time of the whole device is controlled to be 2 to 3 hours.

[0031] The present invention adopts the above technical solution, which has the following beneficial effects:

[0032] 1. The mobile denitrification, dephosphorization and algae control integrated device and method provided by the present invention are suitable for denitrification treatment of low C / N water bodies. The landscape wastewater first passes through the filtration system to filter out larger suspended particles and agglomerated algae in the water body. The added magnetite can precipitate iron and promote the removal of phosphorus. In addition to removing agglomerated algae, the filtration can also prevent subsequent blockage of other operating units. After filtration, the water is pumped to the top of the device using a hydraulic lifting system;

[0033] 2. The spray water distribution device sprays water evenly, and the high contact area enables the water to achieve atmospheric reoxygenation during the spraying process. During the water distribution process, ultraviolet irradiation destroys the algae cell structure, and at the same time cooperates with the photocatalyst to produce a large amount of reactive oxygen species (ROS), which realizes the oxidation of algae cells and is conducive to the subsequent removal of algae;

[0034] 3. Carrying the inorganic electron donor (hydrogen) produced by the cathode through the cathode area, and then denitrifying in the anode area to achieve the removal of nitrate nitrogen;

[0035] 4. Through the polyurethane filler area, the polyurethane filler filled in the reactor serves as a carrier for microbial attachment and growth, and ammonia nitrogen is nitrified and removed through aeration. Under the action of the electrode, the entire reactor realizes the whole process of hydrogen autotrophic denitrification, which is combined with the nitrification and denitrification of each zone, greatly improving the denitrification performance of the entire denitrification.

[0036] This mobile integrated reactor for nitrogen removal, phosphorus removal and algae control uses ultraviolet light catalysis to control algae when treating low C / N landscape water bodies, and is assisted by aerobic denitrification to achieve efficient nitrogen removal. It has the advantages of high nitrogen removal efficiency and low energy consumption, and also has the function of urban cultural empowerment and publicity, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute an improper limitation of the present invention. In the drawings:

[0038] Figure 1 It is a schematic structural diagram of a movable integrated device for nitrogen removal, phosphorus removal and algae control according to an embodiment of the present invention.

[0039] Explanation of the accompanying drawings: 1-spraying water distribution area, 2-cathode hydrogen production area, 3-anode film forming area, 4-hydraulic lifting system, 5-detachable water inlet filtration system, 6-mobile floating box, 7-solar power supply system, 8-ultraviolet photocatalytic algae control device, 9-flexible LED screen, 10-atmospheric reoxygenation vent, 11-Uv isolation water distribution board, 12-ruthenium iridium electrode, 13-graphite carbon felt, 14-water outlet pipe, 15-photocatalyst. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0041] like Figure 1 As shown, the present invention provides a movable integrated device for nitrogen removal, phosphorus removal and algae control. The overall design of the device is divided into two parts, above and below the water. The above-water part includes a phosphorus removal and algae control device body, including a phosphorus removal and algae control device body, which is divided from bottom to top into an anode film forming area 3, a cathode hydrogen production area 2 and a spray water distribution area 1, the anode film forming area 3 is filled with polyurethane filler, the cathode hydrogen production area 2 is filled with steel wool, two layers of graphite carbon felt 13 are arranged in the middle of the anode film forming area 3 as an anode, an iridium plate 12 is arranged in the middle of the cathode hydrogen production area 2 as a cathode, and the cathode hydrogen production area 2 is divided into an upper and lower part by three ruthenium iridium grid plates. In one embodiment, the grid size of the ruthenium iridium grid plate is 5-8 mm, and the cathode hydrogen production area 2 is filled with steel wool with a diameter of 5-8 cm.

[0042] The spray water distribution area 1 is located at the top of the phosphorus removal and algae control device body, and the spray water distribution area 1 and the cathode hydrogen production area 2 are separated by a UV isolation water distribution plate 11; an ultraviolet light catalytic algae control device 8 and a photocatalyst 15 arranged vertically at intervals are provided in the spray water distribution area 1, and the current of the ultraviolet light catalytic algae control device 8 is supplied by a solar power supply system 7.

[0043] The underwater part includes a mobile pontoon 6, the bottom of the phosphorus removal and algae control device body is arranged on the mobile pontoon 6, a hydraulic lifting system 4 is arranged in the mobile pontoon 6, and the hydraulic lifting system 4 is connected to the phosphorus removal and algae control device body and a detachable water inlet filtration system 5 that can be placed in the moat through a circulating pump. The circulating pump water delivery pipe of the hydraulic lifting system 4 passes through the center of the anode biofilm area 3 and the cathode hydrogen production area 2 and extends to the top of the spray water distribution area 1 to communicate with the spray device, and a water outlet pipe 14 is arranged at the bottom of the anode biofilm area 3.

[0044] Furthermore, a flexible LED screen 9 is wrapped around the outside of the phosphorus removal and algae control device body. The design of the flexible LED screen can beautify the device body. The device is placed in the moat to display the historical and cultural content of local ancient buildings through the flexible LED screen.

[0045] The flexible LED screen is powered by a solar power supply system 7. An atmospheric reoxygenation vent 10 is provided on the spray water distribution area 1.

[0046] The solar power supply system 7 supplies power to the hydraulic lifting system 4 and the ultraviolet photocatalytic algae control device 8 .

[0047] The spraying water distribution area 1, the cathode hydrogen production area 2 and the anode biofilm area 3 are operated in series from bottom to top. The wastewater to be treated is transmitted to the phosphorus removal and algae control device body through the hydraulic lifting system 4. After spraying and nitrification, the nitrogen removal, phosphorus removal and algae control process of the water body are realized.

[0048] The above-water part of the device is surrounded by flexible LED screens, which decorate the moat landscape through light emission, have a modern visual effect, and also have dynamic publicity functions to meet diverse display needs. The LED display content in the device can be flexibly changed to achieve visual communication of different themes.

[0049] The underwater part is a water lifting device; the above-water part is cylindrical, about 2.0-2.5m above the water surface, and is suspended in the center of the moat by a pontoon. In one embodiment, the distance between each device in the river section is about 100m, which complements the overall height of the city wall of 13-15m and is beautiful.

[0050] The mechanism of nitrogen removal, phosphorus removal and algae control of the present invention is:

[0051] The landscape sewage first passes through a detachable water inlet filtration system to filter out larger suspended particles in the water to prevent subsequent blockage of other operating units. After filtration, it is pumped to the top of the device using a hydraulic lifting system, and then the water is evenly sprayed in the spraying water distribution area. The high contact area enables the water to achieve atmospheric reoxygenation during the spraying process. An ultraviolet photocatalytic algae control device is added to the entire water distribution area. The catalyst photocatalytic reaction occurs while the ultraviolet light is irradiated, causing the algae cells to be exposed to ultraviolet radiation and strong oxidation, and eventually die. The presence of the UV isolation water distribution board can not only prevent ultraviolet light from entering the cathode hydrogen production area and affecting the cathode area, but also achieve uniform water distribution. After the water enters the cathode hydrogen production area, hydrogen is produced through the plate electrolysis to achieve the replenishment of inorganic electron donors, thereby performing denitrification and achieving the removal of nitrate nitrogen; then the anode film area is filled with polyurethane in the middle of the interlayer through the carbon felt as the anode, and the polyurethane filler filled in the reactor is used as a carrier for microbial attachment and growth, and the nitrification and removal of ammonia nitrogen are achieved through atmospheric reoxygenation, and the electrochemical action will further achieve the effect of inhibiting algae. The entire reactor achieves energy self-sufficiency with the assistance of the solar power supply system, realizes the killing of free algae cells at the front end and hydrogen autotrophic denitrification at the back end, and the combination of nitrification and denitrification in each zone greatly improves the denitrification performance of the entire denitrification and achieves efficient algae control.

[0052] The present invention further provides a mobile integrated method for nitrogen removal, phosphorus removal and algae control, comprising the following steps:

[0053] Step 1, placing a photocatalyst 15 in the spray water distribution area 1, filling steel wool balls in the cathode hydrogen production area 2, and filling polyurethane fillers in the anode film forming area 3.

[0054] Step 2: The hydraulic lifting system 4 pumps the polluted water into the phosphorus removal and algae control device body through the detachable water inlet filtration system 5. The water flow rate of the hydraulic lifting system 4 is 0.2m / s to 1m / s.

[0055] The inlet water filtration system 5 uses a mixture of magnetite and quartz sand to filter the inlet water. Quartz sand is used as the upper filter material with a thickness of 20 to 30 cm, which can effectively remove impurities such as suspended matter and colloids in the water. Magnetite is used as the bottom filter material with a thickness of 20 to 30 cm to prevent the loss of fine quartz sand, provide good water flow distribution and provide a certain amount of iron ions for the inlet water.

[0056] Control the influent ammonia nitrogen concentration at 1mg / L-2.2mg / L, nitrate nitrogen concentration at 5mg / L-7.1mg / L, total nitrogen concentration at 6mg / L-8.8mg / L, and COD concentration at 1.0mg / L-4.8mg / L.

[0057] Step 3, the filtered influent water is sprayed on the top of the spray water distribution area 1, and the spray water distribution area uses an ultraviolet photocatalytic algae control device, which is 8 15W low-pressure mercury lamps with a wavelength of 185nm or 254nm. The photocatalyst 15 uses BiOBrI@MoS2.

[0058] Step 4, the solar power supply system 7 supplies power to the anode film forming area 3 and the cathode hydrogen production area 2 to electrolyze the sprayed water; the hydraulic retention time of the whole device is 2 to 3 hours.

[0059] In this embodiment, the outlet ammonia nitrogen concentration of the denitrification device is 0.3mg / L-0.5mg / L, the outlet nitrate nitrogen concentration is 0.7mg / L-1.2mg / L, and the outlet total nitrogen concentration is 1mg / L-2.1mg / L. The average removal rate of ammonia nitrogen can reach 75%, the average removal rate of nitrate nitrogen can reach 85%, and the average removal rate of total nitrogen can reach 82%. At the same time, the ultraviolet photocatalytic algae control system and the three-dimensional electrochemical system in the cathode and anode zones can significantly inhibit the growth of algae, and the algae inhibition efficiency can reach more than 80%.

[0060] The present invention is further described below through different embodiments.

[0061] Example 1

[0062] Step 1, placing a photocatalyst in the spray water distribution area, filling steel wool in the cathode hydrogen production area, and filling polyurethane filler in the anode film formation area;

[0063] Step 2: The hydraulic lifting system pumps the polluted water into the detachable water inlet filtration system, and the water flow rate of the hydraulic lifting system is 0.5 m / s;

[0064] The thickness of the upper filter material quartz sand in the water inlet filtration system is 20cm, and the thickness of the bottom filter material magnetite is 30cm.

[0065] The influent ammonia nitrogen concentration is controlled at 1.2 mg / L, nitrate nitrogen concentration is controlled at 7.1 mg / L, total nitrogen concentration is controlled at 8.5 mg / L, and COD concentration is controlled at 3.0 mg / L.

[0066] Step 3: The filtered influent water is sprayed on the top of the spray water distribution area, and eight 15W low-pressure mercury lamps with a wavelength of 254nm are used in the spray water distribution area. The photocatalyst is BiOBrI@MoS2.

[0067] Step 4, the solar power supply system supplies power to the anode film forming area and the cathode hydrogen production area to electrolyze the sprayed water; the hydraulic retention time of the whole device is 2 hours.

[0068] In this embodiment, the effluent ammonia nitrogen concentration of the denitrification device is 0.3 mg / L, the effluent nitrate nitrogen concentration is 0.75 mg / L, the effluent total nitrogen concentration is 1.08 mg / L, the effluent COD concentration is 1.0 mg / L, the average removal rate of ammonia nitrogen can reach 75%, the average removal rate of nitrate nitrogen can reach 89.4%, and the average removal rate of total nitrogen can reach 87.3%. Through multiple mechanisms such as ultraviolet photocatalysis and electrolysis in the system design, the inhibition effect on algae growth can also reach more than 83%.

[0069] Example 2

[0070] Step 1, placing a photocatalyst in the spray water distribution area, filling steel wool in the cathode hydrogen production area, and filling polyurethane filler in the anode film forming area.

[0071] Step 2: The hydraulic lifting system pumps the polluted water into the detachable water inlet filtration system, and the water flow rate of the hydraulic lifting system is 1m / s.

[0072] The thickness of the upper filter material quartz sand in the water inlet filtration system is 25cm, and the thickness of the bottom filter material magnetite is 20cm.

[0073] The influent ammonia nitrogen concentration is controlled at 2.2 mg / L, nitrate nitrogen concentration is controlled at 5.6 mg / L, total nitrogen concentration is controlled at 6.2 mg / L, and COD concentration is controlled at 1.5 mg / L.

[0074] Step 3: The filtered influent water is sprayed on the top of the spray water distribution area, and eight 15W low-pressure mercury lamps with a wavelength of 185nm are used in the spray water distribution area. The photocatalyst is BiOBrI@MoS2.

[0075] Step 4, the solar power supply system supplies power to the anode film forming area and the cathode hydrogen production area to electrolyze the sprayed water; the hydraulic retention time of the whole device is 3 hours.

[0076] In this embodiment, the effluent ammonia nitrogen concentration of the denitrification device is 0.4 mg / L, the effluent nitrate nitrogen concentration is 0.9 mg / L, the effluent total nitrogen concentration is 1.33 mg / L, the effluent COD concentration is 1.15 mg / L, the average removal rate of ammonia nitrogen can reach 81.8%, the average removal rate of nitrate nitrogen can reach 83.9%, and the average removal rate of total nitrogen can reach 83.9%. Through multiple mechanisms such as ultraviolet photocatalysis and electrolysis in the system design, the inhibition effect on algae growth can also reach more than 85%.

[0077] Example 3

[0078] Step 1, placing a photocatalyst in the spray water distribution area, filling steel wool in the cathode hydrogen production area, and filling polyurethane filler in the anode film formation area;

[0079] Step 2: The hydraulic lifting system pumps the polluted water into the detachable water inlet filtration system, and the water flow rate of the hydraulic lifting system is 0.2m / s.

[0080] The thickness of the upper filter material quartz sand in the water inlet filtration system is 30cm, and the thickness of the bottom filter material magnetite is 20cm.

[0081] The influent ammonia nitrogen concentration is controlled at 1.7 mg / L, nitrate nitrogen concentration is controlled at 7.0 mg / L, total nitrogen concentration is controlled at 8.8 mg / L, and COD concentration is controlled at 4.8 mg / L.

[0082] Step 3: The filtered influent water is sprayed on the top of the spray water distribution area, and eight 15W low-pressure mercury lamps with a wavelength of 254nm are used in the spray water distribution area. The photocatalyst is BiOBrI@MoS2.

[0083] Step 4: The solar power supply system supplies power to the anode film forming area and the cathode hydrogen production area to electrolyze the sprayed water; the hydraulic retention time of the whole device is 2.5 hours.

[0084] In this embodiment, the outlet ammonia nitrogen concentration of the denitrification device is 0.35 mg / L, the outlet nitrate nitrogen concentration is 1.05 mg / L, the outlet total nitrogen concentration is 1.52 mg / L, the outlet COD concentration is 1.30 mg / L, the average removal rate of ammonia nitrogen can reach 79.4%, the average removal rate of nitrate nitrogen can reach 85%, and the average removal rate of total nitrogen can reach 82.7%. Through the combined action of ultraviolet light catalysis and three-dimensional electrochemistry, the system can achieve an inhibition efficiency of more than 80% on algae growth.

[0085] The reaction zones of the present invention are connected in series from top to bottom, with water entering from the detachable water inlet filtration system 5 and water exiting from the water outlet pipe 14. The detachable water inlet filtration system 5 intercepts and filters the particulate matter in the polluted water body, and then lifts the water body to the spray water distribution area 1 through the hydraulic lifting system 4. The surface area of ​​the water body in contact with ultraviolet light and the atmosphere is increased by spraying water, and the algae structure is fully destroyed under the action of the photocatalyst BiOBrI@MoS2 to kill free algae cells, and atmospheric reoxygenation is performed at the same time, providing an aerobic environment for subsequent aerobic denitrification. When the gravity potential energy water passes through the UV isolation water distribution plate 11 and flows through the cathode hydrogen production area 2, the cathode hydrogen production area will produce hydrogen gas that is introduced into the anode biofilm area 3 along with the water flow. The good conductivity of the graphite felt and the biological biofilm are combined with the filling of polyurethane to form a stable three-dimensional biofilm electrode system with the cathode area, realizing green and efficient denitrification.

[0086] The present invention can achieve efficient removal of ammonia nitrogen, nitrate nitrogen and nitrite nitrogen in polluted landscape water, thereby killing free algae cells and achieving effective algae inhibition. The reactor has the advantages of significant denitrification effect, simple operation and low energy consumption, and is suitable for the field of efficient denitrification and algae inhibition technology in urban landscape water.

[0087] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A mobile integrated device for nitrogen removal, phosphorus removal and algae control, characterized in that: It includes above-water and underwater parts; The above-water part includes the phosphorus removal and algae control device body, which is divided from bottom to top into an anode film-forming area, a cathode hydrogen production area and a spray water distribution area. The anode film-forming area is filled with polyurethane filler and an anode plate is provided. The cathode hydrogen production area is filled with steel balls and a cathode plate is provided. The spray water distribution area and the cathode hydrogen production area are separated by a UV isolation water distribution plate. An ultraviolet catalytic algae control device and a photocatalyst are provided in the spray water distribution area. A water outlet pipe is provided at the bottom of the anode film-forming area. The underwater part includes a hydraulic lifting system connected to the main body of the phosphorus removal and algae control device and a detachable water inlet filtration system. The hydraulic lifting system inputs the filtered polluted water into the top of the spray water distribution area, and carries out the nitrogen removal, phosphorus removal and algae control process under the action of spraying, ultraviolet radiation and electrolysis.

2. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: Ultraviolet light catalytic algae control devices and BiOBrI@MoS2 photocatalysts are arranged vertically at intervals in the spray water distribution area.

3. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: Two layers of graphite carbon felt are set in the middle of the anode film forming area as the anode plate; the cathode hydrogen production area is composed of three ruthenium iridium grid plates as the cathode plate.

4. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: The water inlet filtration system includes an upper layer of magnetite filter material and a bottom layer of quartz sand filter material, each with a thickness of 20 to 30 cm.

5. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: The bottom of the phosphorus removal and algae control device body is arranged on a mobile floating box, and the hydraulic lifting system is in the mobile floating box.

6. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: The circulating pump water delivery pipe of the hydraulic lifting system passes through the center of the anode film-forming area and the cathode hydrogen production area, extends to the top of the spray water distribution area and is connected with the spray device.

7. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 1 is characterized in that: A flexible LED screen is wrapped on the outside of the phosphorus removal and algae control device body; and an atmospheric reoxygenation vent is provided on the spray water distribution area.

8. The mobile integrated device for nitrogen removal, phosphorus removal and algae control according to claim 7 is characterized in that: It also includes a solar power supply system connecting an ultraviolet photocatalytic algae control device, an anode plate, a cathode plate, a hydraulic lifting system and a flexible LED screen.

9. A method for denitrification, dephosphorization and algae control using a movable integrated denitrification, dephosphorization and algae control device according to any one of claims 1 to 8, characterized in that: include: (a) placing a photocatalyst in the spray water distribution area, filling steel wool in the cathode hydrogen production area, and filling polyurethane filler in the anode film formation area; (b) The hydraulic lifting system pumps the polluted water into the phosphorus removal and algae control device through the detachable water inlet filtration system, controls the water flow rate of the hydraulic lifting system, and controls the inlet ammonia nitrogen concentration, nitrate nitrogen concentration, total nitrogen concentration and COD concentration; (c) The filtered water is sent to the top of the spray water distribution area for spraying, ultraviolet irradiation and photocatalysis; (d) The solar power supply system supplies power to the anode biofilm forming area and the cathode hydrogen production area, electrolyzes the sprayed water, controls the hydraulic retention time of the entire device, and removes nitrogen and phosphorus from the polluted water and controls algae.

10. The denitrification, dephosphorization and algae control method of the movable denitrification, dephosphorization and algae control integrated device according to claim 9, characterized in that: Control the water flow rate of the hydraulic lifting system to 0.2m / s~1m / s; Control the influent ammonia nitrogen concentration to 1mg / L-2.2mg / L, nitrate nitrogen concentration to 5mg / L-7.1mg / L, total nitrogen concentration to 6mg / L-8.8mg / L, and COD concentration to 1.0mg / L-4.8mg / L; The hydraulic retention time of the whole device is controlled to be 2 to 3 hours.

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