A mobile integrated device and method for nitrogen and phosphorus removal and algae control

Abstract

This invention discloses a mobile integrated device and method for nitrogen and phosphorus removal and algae control, comprising an above-water section and an underwater section. The above-water section consists of an anode biofilm formation zone, a cathode hydrogen production zone, and a spray-type water distribution zone, separated from bottom to top within the main body of the phosphorus removal and algae control device. The anode biofilm formation zone is filled with polyurethane filler and equipped with an anode plate, while the cathode hydrogen production zone is filled with steel wool and equipped with a cathode plate. The spray-type water distribution zone and the cathode hydrogen production zone are separated by a UV-isolated water distribution plate. The spray-type water distribution zone is equipped with vertically arranged ultraviolet photocatalytic algae control devices and photocatalysts. A water outlet pipe is installed at the bottom of the anode biofilm formation zone. The underwater section includes a hydraulic lifting system connected to the main body of the phosphorus removal and algae control device, which inputs filtered polluted water to the top of the spray-type water distribution zone. Under the action of spraying, ultraviolet radiation, and electrolysis, nitrogen and phosphorus removal and algae control processes are carried out. This device can efficiently remove ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen from urban landscape water bodies.

Description

Technical Field

[0001] This invention relates to the fields 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 device for denitrification, phosphorus removal and algae control in low C / N landscape water bodies, the mechanism of denitrification and algae control and its application in the field of hydrogen autotrophic denitrification deep denitrification, while combining environmental protection and cultural promotion to promote the dual development of environment and economy. Background Technology

[0002] As part of the ancient city wall's military defense system, the moat has been transformed into an important river for urban rainwater storage and flood discharge. The water in the moat is typically replaced only once a month, remaining mostly still with poor water flow.

[0003] The main problems facing the moats of ancient buildings are as follows:

[0004] (1) High concentration of nutrients

[0005] The root cause of algal blooms is the excessively high nutrient concentration in the moat. Studies generally consider the boundary conditions for algal blooms to be a total nitrogen (TN) concentration exceeding 0.5 mg / L, a total phosphorus (TP) concentration exceeding 0.02 mg / L, and an N / P ratio consistently around 15, which is conducive to algal reproduction and growth. Typically, during the summer, when water temperatures rise and rainfall increases, leading to initial rainwater runoff and pollution, the TN concentration in some sections of the moat reaches 7-8 mg / L, and the TP concentration reaches around 1 mg / L, but these are far above the critical values ​​for algal blooms.

[0006] (2) The ecosystem is simple and the water body has poor self-purification capacity.

[0007] The existing aquatic ecosystem of the moat is simple, with few aquatic animals such as fish and a small number of aquatic plants. Only some sections of the riverbank have been observed to have ecological floating islands.

[0008] Therefore, the overall approach to water quality management in the moat should adhere to the principle of addressing pollution at its source. The most economical and effective fundamental solution is to improve the source water quality to a level that basically meets the requirements of the moat, in accordance with the water quality standards for the moat itself. Secondly, efforts should be made to change the moat's water from a relatively stagnant state to a flowing state, enhancing its self-purification capacity. This is the main guarantee for maintaining the water's good condition and preventing water quality deterioration. Furthermore, it is necessary to construct a microbial system to enhance the water's self-purification and repair capabilities, balance the bacterial and algal communities in the water, reduce eutrophication, and maintain stable water quality indicators.

[0009] Traditional water treatment technologies, such as biological denitrification, chemical dosing, and aeration, usually require certain conditions. For example, biological denitrification depends on a high carbon-to-nitrogen ratio (C / N).

[0010] Therefore, providing a mobile integrated device for nitrogen and phosphorus removal and algae control that can achieve efficient nitrogen removal and inhibit or kill the growth of free algal cells has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0011] To address the aforementioned deficiencies in the existing technology, the present invention aims to provide a mobile integrated device and method for nitrogen and phosphorus removal and algae control. This device is driven by solar energy and uses biofilm electrode hydrogen autotrophic denitrification as its core to remove ammonia nitrogen, nitrate nitrogen and nitrite nitrogen from urban landscape water bodies. It is suitable for nitrogen and phosphorus removal and algae control in urban landscape water bodies.

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

[0013] One aspect of the present invention provides a mobile integrated device for nitrogen and phosphorus removal and algae control, comprising an above-water section and an underwater section;

[0014] The above-water section includes the main body of the phosphorus removal and algae control device, which is divided from bottom to top into an anode biofilm formation zone, a cathode hydrogen production zone, and a spray-type water distribution zone. The anode biofilm formation zone is filled with polyurethane filler and equipped with an anode plate, while the cathode hydrogen production zone is filled with steel wool and equipped with a cathode plate. The spray-type water distribution zone and the cathode hydrogen production zone are separated by a UV-isolated water distribution plate. The spray-type water distribution zone is equipped with an ultraviolet photocatalytic algae control device and a photocatalyst. An outlet pipe is installed at the bottom of the anode biofilm formation zone.

[0015] The underwater section includes a hydraulic lifting system connected to the main body of the phosphorus removal and algae control device and a detachable inlet filtration system. The hydraulic lifting system inputs the filtered polluted water into the top of the spray-type water distribution area, where it undergoes denitrification, phosphorus removal, and algae control under the action of spraying, ultraviolet radiation, and electrolysis.

[0016] Preferably, the spray-type water distribution area is equipped with a vertically spaced ultraviolet photocatalytic algae control device and a BiOBrI@MoS2 photocatalyst.

[0017] Preferably, 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 consists of three ruthenium-iridium grid plates as the cathode plate.

[0018] As a preferred option, the inlet filtration system includes an upper layer of magnetite filter media and a lower layer of quartz sand filter media, each with a thickness of 20-30 cm.

[0019] Preferably, the bottom of the phosphorus removal and algae control device is located on a mobile pontoon, and the hydraulic lifting system is located in the mobile pontoon.

[0020] Preferably, the circulating pump water delivery pipe of the hydraulic lifting system passes through the center of the anode film formation area and the cathode hydrogen production area and extends to the top of the spray-type water distribution area, where it is connected to the spray device.

[0021] As a preferred option, a flexible LED screen is wrapped around the outside of the phosphorus removal and algae control device; and an atmospheric reoxygenation vent is provided in the spray-type water distribution area.

[0022] As a preferred option, it also includes a solar power system that connects 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 nitrogen and phosphorus removal and algae control using the aforementioned mobile integrated denitrification, phosphorus removal, and algae control device, comprising:

[0024] (a) Place a photocatalyst in the spray-type water distribution area, fill the cathode hydrogen production area with steel wire balls, and fill the anode film-forming area with polyurethane filler.

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

[0026] (c) The filtered inlet water is sprayed, irradiated with ultraviolet light and photocatalyzed at the top of the spray-type water distribution area;

[0027] (d) The solar power system 7 supplies power to the anode biofilm formation zone 3 and the cathode hydrogen production zone 2 to electrolyze the sprayed water, control the hydraulic residence time of the entire device, and remove nitrogen, phosphorus and algae from the polluted water.

[0028] As a preferred option, the water flow velocity in the hydraulic lifting system is controlled to be 0.2 m / s to 1 m / s;

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

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

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

[0032] 1. The mobile integrated device and method for denitrification, phosphorus removal, and algae control provided by this invention is suitable for denitrification treatment of low C / N water bodies. The landscape wastewater first passes through a filtration system to filter out larger suspended particles and aggregated algae. The added magnetite can precipitate iron and promote phosphorus removal. In addition to removing aggregated algae, the filtration also prevents clogging 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-type water distribution device sprays water evenly, and the high contact area allows the water to be re-oxygenated during the spraying process. During the water distribution process, ultraviolet radiation destroys the structure of algal cells, and at the same time, a large number of reactive oxides (ROS) are generated in conjunction with photocatalysts, which realizes the oxidation of algal cells and facilitates the subsequent removal of algae.

[0034] 3. The inorganic electron donor (hydrogen) generated at the cathode is carried through the cathode region and then denitrification is carried out in the anode region to remove nitrate nitrogen;

[0035] 4. In the polyurethane-filled zone, the polyurethane packing material in the reactor serves as a carrier for microbial attachment and growth, achieving ammonia nitrogen nitrification removal through aeration. Under the influence of electrodes, the entire reactor achieves hydrogen autotrophic denitrification throughout the process. Combined with the nitrification and denitrification processes in each zone, this significantly improves the overall nitrogen removal performance of the denitrification process.

[0036] This mobile integrated reactor for nitrogen and phosphorus removal and algae control, when treating low C / N landscape water bodies, uses ultraviolet photocatalytic algae control combined with hydrogen autotrophic denitrification, supplemented 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, with broad application prospects. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, do not constitute an undue limitation of the invention. In the drawings:

[0038] Figure 1 This is a schematic diagram of the structure of a mobile integrated device for nitrogen and phosphorus removal and algae control, based on an embodiment of the present invention.

[0039] Explanation of reference numerals in the attached diagram: 1-Spray water distribution area, 2-Cathode hydrogen production area, 3-Anode biofilm formation area, 4-Hydraulic lifting system, 5-Detachable inlet water 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 plate, 12-Ruthenium-iridium electrode plate, 13-Graphite carbon felt, 14-Outlet pipe, 15-Photocatalyst. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative 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 mobile integrated device for nitrogen and phosphorus removal and algae control. The overall design of the device is divided into two parts: above water and underwater. The above water part includes the phosphorus removal and algae control device body, which is divided from bottom to top into an anode biofilm formation zone 3, a cathode hydrogen production zone 2, and a spray-type water distribution zone 1. The anode biofilm formation zone 3 is filled with polyurethane filler, and the cathode hydrogen production zone 2 is filled with steel wool. Two layers of graphite carbon felt 13 are set in the middle of the anode biofilm formation zone 3 as the anode, and an iridium electrode plate 12 is set in the middle of the cathode hydrogen production zone 2 as the cathode. The cathode hydrogen production zone 2 is divided into upper and lower parts by three ruthenium-iridium grid electrode plates. In one embodiment, the grid size of the ruthenium-iridium grid electrode plates is 5-8 mm, and the cathode hydrogen production zone 2 is filled with steel wool with a diameter of 5-8 cm.

[0042] The spray-type water distribution area 1 is located at the top of the phosphorus removal and algae control device. The spray-type water distribution area 1 and the cathode hydrogen production area 2 are separated by a UV isolation water distribution plate 11. The spray-type water distribution area 1 is equipped with a vertically arranged ultraviolet photocatalytic algae control device 8 and a photocatalyst 15. The current of the ultraviolet photocatalytic algae control device 8 is supplied by a solar power supply system 7.

[0043] The underwater component includes a mobile pontoon 6, on which the bottom of the phosphorus removal and algae control device is mounted. A hydraulic lifting system 4 is installed within the pontoon 6. The hydraulic lifting system 4 connects the phosphorus removal and algae control device to a detachable inlet filtration system 5, which can be placed in the moat, via a circulating pump. The circulating pump pipe of the hydraulic lifting system 4 passes through the center of the anode biofilm formation zone 3 and the cathode hydrogen production zone 2, extending to the top of the spray-type water distribution zone 1 and connecting with the spray device. An outlet pipe 14 is installed at the bottom of the anode biofilm formation zone 3.

[0044] Furthermore, a flexible LED screen 9 is wrapped around the outside of the phosphorus removal and algae control device. The design of the flexible LED screen can beautify the device and display the local ancient architectural history and culture through the flexible LED screen when the device is placed in the moat.

[0045] The flexible LED screen is powered by a solar power system 7. An atmospheric re-oxygenation vent 10 is provided in the spray-type water distribution area 1.

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

[0047] The spray-type water distribution zone 1, the cathode hydrogen production zone 2, and the anode biofilm formation zone 3 operate in series from bottom to top. The wastewater to be treated is transported to the main body of the phosphorus removal and algae control device through the hydraulic lifting system 4. After spraying and nitrification, the process of nitrogen removal, phosphorus removal, and algae control in the water body is realized.

[0048] The water-based portion of this installation is surrounded by flexible LED screens, which illuminate and decorate the moat landscape, creating a modern visual effect while also providing dynamic advertising capabilities to meet diverse display needs. The content displayed on the LED screens 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 float. In one embodiment, the distance between each device in the river section is about 100m, and the overall height of the wall is 13-15m, which complements the aesthetics.

[0050] The denitrification, phosphorus removal, and algae control mechanism of this invention is as follows:

[0051] The wastewater first passes through a detachable inlet filtration system to remove larger suspended particles, preventing clogging of subsequent operating units. After filtration, the water is pumped to the top of the system via a hydraulic lift system, and then evenly sprayed down in a spray distribution area. The high contact area allows for atmospheric reoxygenation during the spraying process. An ultraviolet (UV) photocatalytic algae control device is added to the entire distribution area. Under UV light, a photocatalytic reaction occurs, subjecting algal cells to UV radiation and strong oxidation, ultimately leading to their death. The presence of a UV-isolated distribution plate not only prevents UV light from entering the cathode hydrogen production area and affecting it, but also ensures uniform water distribution. After entering the cathode hydrogen production area, the water undergoes electrolysis to produce hydrogen, replenishing inorganic electron donors for denitrification and nitrate removal. Then, a polyurethane film is formed in the anode area, with carbon felt as the anode and polyurethane filling the interlayer. The polyurethane packing material in the reactor acts as a carrier for microbial attachment and growth, achieving ammonia nitrification removal through atmospheric reoxygenation. Furthermore, the electrochemical process further inhibits algae growth. With the assistance of a solar power system, the entire reactor achieves energy self-sufficiency, enabling the killing of free algal cells at the front end and hydrogen autotrophic denitrification at the back end. The combination of nitrification and denitrification in each zone greatly improves the overall nitrogen removal performance of denitrification, achieving efficient algae control.

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

[0053] Step 1: Place photocatalyst 15 in the spray-type water distribution zone 1, fill steel wool balls in the cathode hydrogen production zone 2, and fill polyurethane filler in the anode film formation zone 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 inlet filtration system 5. The water flow velocity 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 incoming water. Quartz sand, as the upper filter media, is 20-30cm thick and can effectively remove suspended solids, colloids, and other impurities from the water. Magnetite, as the bottom filter media, is 20-30cm thick and prevents the loss of fine quartz sand, while also providing good water flow distribution and supplying the incoming water with a certain amount of iron ions.

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

[0057] Step 3: The filtered influent is sprayed onto the top of the spray-type water distribution area 1. The spray-type water distribution area uses an ultraviolet photocatalytic algae control device consisting of eight 15W low-pressure mercury lamps with wavelengths of 185nm or 254nm. The photocatalyst 15 is BiOBrI@MoS2.

[0058] Step 4: The solar power system 7 supplies power to the anode film formation zone 3 and the cathode hydrogen production zone 2 to electrolyze the sprayed water; the hydraulic residence time of the entire device is 2 to 3 hours.

[0059] In this embodiment, the effluent ammonia nitrogen concentration of the denitrification device is 0.3 mg / L-0.5 mg / L, the effluent nitrate nitrogen concentration is 0.7 mg / L-1.2 mg / L, and the effluent total nitrogen concentration is 1 mg / L-2.1 mg / 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 anode and cathode regions can significantly inhibit algae growth, with an algae inhibition efficiency of over 80%.

[0060] The present invention will be further illustrated below through different embodiments.

[0061] Example 1

[0062] Step 1: Place the photocatalyst in the spray-type water distribution area, fill the cathode hydrogen production area with steel wool balls, and fill the anode film formation area with polyurethane filler.

[0063] Step 2: The hydraulic lift system pumps the polluted water into the detachable inlet filtration system. The water flow velocity in the hydraulic lift system is 0.5 m / s.

[0064] The upper layer of the water inlet filtration system is made of quartz sand with a thickness of 20cm, and the lower layer is made of magnetite with a thickness of 30cm.

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

[0066] Step 3: The filtered water is sprayed onto the top of the spray-type water distribution area, which uses eight 15W low-pressure mercury lamps with a wavelength of 254nm. The photocatalyst is BiOBrI@MoS2.

[0067] Step 4: The solar power system supplies electricity to the anode film formation area and the cathode hydrogen production area to electrolyze the sprayed water; the hydraulic residence time of the entire 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, and 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%. The system design utilizes multiple mechanisms such as ultraviolet photocatalysis and electrolysis to achieve an inhibition effect of over 83% on algae growth.

[0069] Example 2

[0070] Step 1: Place the photocatalyst in the spray-type water distribution area, fill the cathode hydrogen production area with steel wire balls, and fill the anode film formation area with polyurethane filler.

[0071] Step 2: The hydraulic lift system pumps the polluted water into the detachable inlet filtration system. The water flow velocity in the hydraulic lift system is 1 m / s.

[0072] The upper layer of the inlet filtration system is made of quartz sand with a thickness of 25cm, and the lower layer is made of magnetite with a thickness of 20cm.

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

[0074] Step 3: The filtered water is sprayed onto the top of the spray-type water distribution area, which uses eight 15W low-pressure mercury lamps with a wavelength of 185nm. The photocatalyst is BiOBrI@MoS2.

[0075] Step 4: The solar power system supplies electricity to the anode film formation area and the cathode hydrogen production area to electrolyze the sprayed water; the hydraulic residence time of the entire 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, and 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%. The system design utilizes multiple mechanisms such as ultraviolet photocatalysis and electrolysis to achieve an inhibition effect of over 85% on algae growth.

[0077] Example 3

[0078] Step 1: Place the photocatalyst in the spray-type water distribution area, fill the cathode hydrogen production area with steel wool balls, and fill the anode film formation area with polyurethane filler.

[0079] Step 2: The hydraulic lift system pumps the polluted water into the detachable inlet filtration system. The water flow velocity in the hydraulic lift system is 0.2 m / s.

[0080] The upper layer of the inlet filtration system is made of quartz sand with a thickness of 30cm, and the lower layer is made of magnetite with a thickness of 20cm.

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

[0082] Step 3: The filtered water is sprayed onto the top of the spray-type water distribution area, which uses eight 15W low-pressure mercury lamps with a wavelength of 254nm. The photocatalyst is BiOBrI@MoS2.

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

[0084] In this embodiment, the effluent ammonia nitrogen concentration of the denitrification device is 0.35 mg / L, the effluent nitrate nitrogen concentration is 1.05 mg / L, the effluent total nitrogen concentration is 1.52 mg / L, and the effluent 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%. The system achieves an inhibition efficiency of over 80% on algae growth through the combined action of ultraviolet photocatalysis and three-dimensional electrochemistry.

[0085] In this invention, the reaction zones are connected in series from top to bottom, with water entering through a detachable inlet filtration system 5 and exiting through an outlet pipe 14. The detachable inlet filtration system 5 intercepts and filters particulate matter from the wastewater, then the water is lifted by a hydraulic lifting system 4 to a spray-type water distribution zone 1. This spray-type water distribution increases the surface area of ​​the water in contact with ultraviolet light and the atmosphere, and under the action of the photocatalyst BiOBrI@MoS2, it effectively destroys the algal structure and kills free algal cells, while simultaneously reoxygenating the atmosphere, providing an aerobic environment for subsequent aerobic denitrification. When the water flows through the UV-isolated water distribution plate 11 via gravity potential energy and passes through the cathode hydrogen production zone 2, hydrogen gas is generated in the cathode hydrogen production zone and introduced into the anode biofilm zone 3 with the water flow. The excellent conductivity of the graphite felt, combined with the biofilm's unique properties and the polyurethane filling, forms a stable three-dimensional biofilm electrode system with the cathode zone, achieving green and efficient denitrification.

[0086] This invention can efficiently remove ammonia nitrogen, nitrate nitrogen, and nitrite nitrogen from polluted water bodies in landscapes, thereby killing free algal cells and effectively suppressing algae. The reactor has advantages such as significant denitrification effect, simple operation, and low energy consumption, making it suitable for the field of efficient denitrification and algae suppression in urban landscape water bodies.

[0087] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. A mobile integrated device for nitrogen and phosphorus removal and algae control, characterized in that, Includes the above-water portion and the underwater portion; The above-water section includes the main body of the phosphorus removal and algae control device, which is divided from bottom to top into an anode biofilm formation zone, a cathode hydrogen production zone, and a spray-type water distribution zone. The anode biofilm formation zone is filled with polyurethane filler and equipped with an anode plate, while the cathode hydrogen production zone is filled with steel wool and equipped with a cathode plate. The spray-type water distribution zone and the cathode hydrogen production zone are separated by a UV-isolated water distribution plate. The spray-type water distribution zone is equipped with an ultraviolet photocatalytic algae control device and a photocatalyst. A water outlet pipe is installed at the bottom of the anode biofilm formation zone. The underwater section includes a hydraulic lifting system connected to the main body of the phosphorus removal and algae control device and a detachable inlet filtration system. The hydraulic lifting system inputs the filtered polluted water into the top of the spray-type water distribution area, where it undergoes denitrification, phosphorus removal, and algae control under the action of spraying, ultraviolet radiation, and electrolysis.

2. The mobile integrated device for nitrogen and phosphorus removal and algae control according to claim 1, characterized in that, The spray-type water distribution area is equipped with ultraviolet photocatalytic algae control devices and BiOBrI@MoS2 photocatalysts arranged vertically at intervals.

3. The mobile integrated device for nitrogen and phosphorus removal and algae control according to claim 1, 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 consists of three ruthenium-iridium grid plates as the cathode plate.

4. The mobile integrated denitrification, phosphorus removal, and algae control device according to claim 1, characterized in that, The inlet filtration system consists of an upper layer of magnetite filter media and a lower layer of quartz sand filter media, each with a thickness of 20-30 cm.

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

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

7. The mobile integrated device for nitrogen and phosphorus removal and algae control according to claim 1, characterized in that, The main body of the phosphorus removal and algae control device is wrapped with a flexible LED screen; atmospheric reoxygenation vents are provided in the spray-type water distribution area.

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

9. A method for nitrogen and phosphorus removal and algae control using a portable integrated device for nitrogen and phosphorus removal and algae control as described in any one of claims 1-8, characterized in that, include: (a) Place a photocatalyst in the spray-type water distribution area, fill the cathode hydrogen production area with steel wire balls, and fill the anode film-forming area with polyurethane filler. (b) The hydraulic lifting system pumps polluted water into the phosphorus removal and algae control device through a detachable 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 inlet water is sprayed, irradiated with ultraviolet light and photocatalyzed at the top of the spray-type water distribution area; (d) The solar power system supplies electricity to the anode biofilm formation area and the cathode hydrogen production area to electrolyze the sprayed water, control the hydraulic residence time of the entire device, and remove nitrogen, phosphorus and algae from the polluted water.

10. The method for nitrogen and phosphorus removal and algae control using the mobile integrated denitrification, phosphorus removal, and algae control device according to claim 9, characterized in that, The water flow velocity in the hydraulic lifting system is controlled to be 0.2 m / s to 1 m / s; Control the influent ammonia nitrogen concentration to 1 mg / L-2.2 mg / L, nitrate nitrogen concentration to 5 mg / L-7.1 mg / L, total nitrogen concentration to 6 mg / L-8.8 mg / L, and COD concentration to 1.0 mg / L-4.8 mg / L; The hydraulic residence time of the entire device is controlled to be 2 to 3 hours.

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