Comprehensive nitrogen and phosphorus removal system for riverway and construction method of comprehensive nitrogen and phosphorus removal system

Abstract

The invention belongs to the technical field of riverway sewage treatment, and particularly relates to a riverway comprehensive nitrogen and phosphorus removal system and a construction method thereof.According to the riverway comprehensive nitrogen and phosphorus removal system, a treatment pond is constructed in a riverway through an enclosure, and water surface garbage is collected in the area, located outside the treatment pond, of the riverway through a water surface garbage collection device; the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, the water surface garbage collecting device is used for collecting water surface garbage, and the water surface garbage collecting device is used for collecting water surface garbage. And the power supply device is used for supplying power to the water surface garbage collection device, the water pump, the gas-liquid mixing biological filter denitrification water purification device and the electric flocculation phosphorus removal device and performing work control, so that the aims of efficiently removing nitrogen and phosphorus while collecting water surface garbage from sewage can be fulfilled.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of river sewage treatment, and particularly relates to a river comprehensive denitrification and dephosphorization system and a method thereof. BACKGROUND

[0002] For some landscape rivers or urban broken rivers with excessive nitrogen and phosphorus, the main reasons for excessive nitrogen and phosphorus include the discharge of fertilizers, livestock and poultry manure, industrial wastewater, domestic sewage and the like, and the self-purification capacity of the water body is difficult to balance the nitrogen and phosphorus discharge amount, and after a long time, problems such as water eutrophication, water quality deterioration and aquatic organism death are caused, resulting in ecological damage. At present, there is a lack of effective way to treat the water body with excessive nitrogen and phosphorus in the landscape river or urban broken river. SUMMARY

[0003] The application aims to provide a river comprehensive denitrification and dephosphorization system and a method thereof, so as to realize denitrification and dephosphorization treatment of sewage in a river by using the river comprehensive denitrification and dephosphorization system.

[0004] In order to achieve the above object, the application adopts the following technical scheme: The application provides a river comprehensive denitrification and dephosphorization system, comprising: a surrounding enclosure for constructing a treatment pool in a river, so that the water in the treatment pool is separated from other water areas in the river; a water surface garbage collecting device arranged in an area outside the treatment pool in the river to collect water surface garbage; a water pump, an inlet of the water pump being communicated to the water surface garbage collecting device to pump sewage after the water surface garbage is filtered out by the water surface garbage collecting device; a gas-liquid mixed biological filter denitrification and water purification device for being communicated to an outlet of the water pump to receive the sewage after the water surface garbage is filtered out, removing ammonia nitrogen in the sewage by the gas-liquid mixed biological filter denitrification and water purification device, and the water after the ammonia nitrogen is removed flowing into the treatment pool; an electrocoagulation dephosphorization device arranged in the treatment pool to perform dephosphorization treatment on the water; a control cabinet arranged on a river bank to supply power to and control the operation of the water surface garbage collecting device, the water pump, the gas-liquid mixed biological filter denitrification and water purification device and the electrocoagulation dephosphorization device.

[0005] Preferably, the water surface garbage collecting device comprises a floating main body, a filter barrel placing bin is arranged in the floating main body, a filter barrel is arranged in the filter barrel placing bin, and a water pump connecting pipe is arranged at the bottom of the floating main body and communicated to the filter barrel placing bin.

[0006] Preferably, the upper part of the floating body is filled with a float, the top of the floating body is provided with a water baffle on the left and right sides respectively, and the front and rear sides are provided with water inlet plates respectively, the water inlet plates are made of material capable of floating on the water surface, the bottom of the water inlet plate is rotatably installed on the water baffle, and a magnetic limiting plate is arranged on the upper part of the water baffle, and a magnetic attraction part is arranged on the water inlet plate.

[0007] Preferably, the gas-liquid mixed biological filter denitrification water purification device comprises a main box body, a biological filter denitrification zone, an ultraviolet zone and a water outlet temporary storage zone are arranged in the internal space of the main box body, wherein a zeolite barrel is arranged in the biological filter denitrification zone, a zeolite filter plate is arranged in the zeolite barrel, an activated carbon filter plate is further arranged in the biological filter denitrification zone, and activated carbon is arranged on the activated carbon filter plate; a filter hole plate is arranged between the bottom of the biological filter denitrification zone and the ultraviolet zone; an ultraviolet lamp is arranged in the ultraviolet zone, and an ultraviolet zone filter plate is arranged in the ultraviolet zone; an overflow partition plate is arranged between the ultraviolet zone and the water outlet temporary storage zone; A gas-liquid mixed water inlet is arranged at the top of the biological filter denitrification zone, the gas-liquid mixed water inlet is connected to the bottom of the zeolite barrel through a pipeline, water in the zeolite barrel overflows to the area where the activated carbon is arranged, and the water filtered by the activated carbon enters the ultraviolet zone in sequence through the activated carbon filter plate and the filter hole plate; the water in the ultraviolet zone enters the water outlet temporary storage zone through the ultraviolet zone filter plate and the overflow partition plate; A first emptying pipe is arranged at the bottom of the biological filter denitrification zone; a second emptying pipe is arranged at the bottom of the water outlet temporary storage zone; an overflow pipe and a water outlet pipe are arranged at the top of the water outlet temporary storage zone; the bottom of the zeolite barrel is a sludge storage area, and the sludge storage area is provided with a sludge discharge pipe connected to the outside of the main box body.

[0008] Preferably, a first Venturi tube and a second Venturi tube are arranged on the pipeline of the gas pump and the gas-liquid mixed biological filter denitrification water purification device, a bacterial species adding barrel is connected to the side inlet of the first Venturi tube, and the bacterial species adding barrel is used for adding microbial species for removing ammonia nitrogen; a gas pump is connected to the side inlet of the second Venturi tube.

[0009] Preferably, a gas-liquid mixer is further arranged between the second Venturi tube and the gas-liquid mixed biological filter denitrification water purification device.

[0010] Preferably, the electrocoagulation phosphorus removal device includes a main frame, in which an electrode module is provided. The electrode module includes multiple electrode plates and a conductive screw, with each electrode plate electrically connected to the conductive screw. An insulating protective plate is provided in the main frame for mounting the electrode module, and an aeration module is provided below the electrode module. An ultrasonic module is provided at the bottom of the main frame, and a floating module is provided at the top of the main frame. The electrocoagulation phosphorus removal device also includes a control module for controlling the operation of the electrode module, the ultrasonic module, and the aeration module.

[0011] Preferably, the aeration module includes an aeration coil with aeration holes distributed on it, an air inlet pipe connected to the aeration coil, and an aeration pump connected to the air inlet pipe.

[0012] Preferably, the enclosure and the riverbank together form the treatment pool; the electrocoagulation phosphorus removal device is connected to the steel pipe piles on the riverbank by steel wire rope.

[0013] This invention also provides a comprehensive denitrification and phosphorus removal method for rivers, comprising: By constructing a treatment pond within the river channel, the water in the treatment pond is separated from other water areas in the river channel; A surface waste collection device is deployed in the river channel outside the treatment pond to collect surface waste. A water pump is installed, and the inlet of the water pump is connected to the surface garbage collection device to pump the sewage after the surface garbage has been filtered out by the surface garbage collection device. A gas-liquid mixed biological filter denitrification and water purification device is installed on the riverbank. The outlet of the water pump is connected to the gas-liquid mixed biological filter denitrification and water purification device. Wastewater after surface debris has been filtered out is pumped to the gas-liquid mixed biological filter denitrification and water purification device, where ammonia nitrogen is removed from the wastewater. The gas-liquid mixed biological filter denitrification and water purification device is connected to the treatment tank through a pipeline, and the water after ammonia nitrogen removal flows into the treatment tank. A first Venturi tube, a second Venturi tube, and a gas-liquid mixer are installed on the pipeline between the air pump and the gas-liquid mixing biological filter denitrification and water purification device. The side inlet of the first Venturi tube is connected to a microbial inoculation tank, through which microbial inoculation for removing ammonia nitrogen is added. The side inlet of the second Venturi tube is connected to an air pump. An electrocoagulation phosphorus removal device is installed in the treatment tank, and the water is treated to remove phosphorus through the electrocoagulation phosphorus removal device; A control cabinet is installed on the riverbank to supply power and control the operation of the surface garbage collection device, water pump, gas-liquid mixed biological filter denitrification and water purification device, air pump, and electrocoagulation phosphorus removal device.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The integrated denitrification and phosphorus removal system for rivers includes a surface garbage collection device, a gas-liquid mixed biological filter denitrification and water purification device, an electrocoagulation phosphorus removal device, a enclosure, a control cabinet, and its supporting pipelines and equipment. The enclosure is used to construct a treatment pond in the river. The surface garbage collection device is used to collect surface garbage in the river outside the treatment pond. The water pump is used to pump the sewage after the surface garbage collection device has filtered out the surface garbage to the gas-liquid mixed biological filter denitrification and water purification device. The gas-liquid mixed biological filter denitrification and water purification device removes ammonia nitrogen from the sewage. The electrocoagulation phosphorus removal device is installed in the treatment pond to remove phosphorus from the water. The control cabinet is installed on the riverbank and is used to supply power and control the operation of the surface garbage collection device, the water pump, the gas-liquid mixed biological filter denitrification and water purification device, and the electrocoagulation phosphorus removal device. Thus, it can achieve the purpose of efficient denitrification and phosphorus removal while collecting surface garbage from sewage. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the layout of an embodiment of the integrated nitrogen and phosphorus removal system for rivers of the present invention, which is arranged in a landscape river.

[0016] Figure 2 This is one of the schematic diagrams showing the arrangement of the enclosure in one embodiment of the integrated denitrification and phosphorus removal system for rivers of the present invention.

[0017] Figure 3 This is the second schematic diagram of the enclosure arrangement in one embodiment of the integrated denitrification and phosphorus removal system for rivers of the present invention.

[0018] Figure 4 This is a schematic diagram of the hoisting of the electrocoagulation phosphorus removal device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0019] Figure 5 This is a schematic diagram of the installation of the control cabinet and the electrocoagulation phosphorus removal device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0020] Figure 6 This is a schematic diagram of the control cabinet installation in one embodiment of the integrated denitrification and phosphorus removal system for rivers of the present invention.

[0021] Figure 7 This is a schematic diagram of the structure of a surface garbage collection device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0022] Figure 8 This is a schematic diagram of the internal structure of a surface garbage collection device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0023] Figure 9 This is a schematic diagram of the structure of the water inlet plate of the water surface garbage collection device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention when water is being introduced by tilting the plate inward.

[0024] Figure 10 This is a three-dimensional structural diagram of the gas-liquid mixed biological filter denitrification and water purification device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0025] Figure 11 This is a schematic diagram of the internal structure of the gas-liquid mixed biological filter denitrification and water purification device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0026] Figure 12 This is a cross-sectional view of the gas-liquid mixed biological filter denitrification and water purification device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0027] Figure 13 This is a schematic diagram of the electrocoagulation phosphorus removal device in one embodiment of the integrated river denitrification and phosphorus removal system of the present invention.

[0028] Figure 14 This is a schematic diagram of the electrode plate module of the electrocoagulation phosphorus removal device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0029] Figure 15 This is a schematic diagram of the main frame of the electrocoagulation phosphorus removal device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0030] Figure 16 This is a schematic diagram of the structure of the gas-air module of the electrocoagulation phosphorus removal device in one embodiment of the river integrated denitrification and phosphorus removal system of the present invention.

[0031] Figure 17 This is a schematic diagram of the layout of another embodiment of the integrated denitrification and phosphorus removal system for rivers of the present invention, which is arranged in a dead-end river channel.

[0032] Figure 18 This is a simplified process flow diagram of an embodiment of the integrated denitrification and phosphorus removal method for rivers according to the present invention.

[0033] Figure 19 This is a detailed process flow diagram of an embodiment of the integrated denitrification and phosphorus removal method for rivers according to the present invention.

[0034] Figure 20 This is statistical data for one embodiment of the integrated denitrification and phosphorus removal method for rivers according to the present invention.

[0035] Figure 21 This is a map of surface water environmental quality indicators used as a reference for the integrated denitrification and phosphorus removal method for rivers in this invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In one embodiment, a comprehensive river denitrification and phosphorus removal system is provided, such as... Figure 1 As shown, this integrated nitrogen and phosphorus removal system is installed in a landscape river to treat the water for nitrogen and phosphorus removal. The system includes a containment 100, a surface debris collection device 200, a water pump 300, a gas-liquid mixed biological filter for nitrogen removal and water purification 400, an electrocoagulation phosphorus removal device 500, and a control cabinet 600. The system combines... Figures 2-3 As shown, the enclosure 100 is used to construct a treatment pond in the river channel, separating the water in the treatment pond from other water areas in the river channel. The enclosure 100 is impermeable, and the water in the treatment pond overflows through the upper edge of the enclosure. In this embodiment, the enclosure 100 and the riverbank jointly construct the treatment pond. Constructing the treatment pond with the enclosure 100 can narrow the water area during phosphorus removal and improve phosphorus removal efficiency.

[0038] A surface debris collection device 200 is installed in an area of ​​the river channel, outside the treatment pond, to collect surface debris. While collecting the debris, it prevents the water pump 300 from clogging it. The inlet of the water pump 300 is connected to the surface debris collection device 200 via a pipe. One water pump 300 can be connected to multiple surface debris collection devices 200 simultaneously to pump wastewater that has been filtered out by the surface debris collection devices 200. In this embodiment, the surface debris collection device 200 is located downstream of the river channel, and the treatment pond is located upstream, thereby achieving phosphorus removal treatment over a relatively large area.

[0039] The gas-liquid mixed biological filter denitrification and water purification device 400 is connected to the outlet of the water pump 300 via the water pump output pipe 310 to receive the wastewater after surface debris has been filtered out. The gas-liquid mixed biological filter denitrification and water purification device 400 removes ammonia nitrogen from the wastewater. The water after ammonia nitrogen removal flows into the treatment tank. The electrocoagulation phosphorus removal device 500 is installed in the treatment tank to remove phosphorus from the water. Figure 4 As shown, the electrocoagulation phosphorus removal device 500 is installed in the treatment tank by hoisting.

[0040] Combination Figures 5-6 As shown, the control cabinet 600 is located on the riverbank and is used to supply power and control the operation of the water pump 300, the gas-liquid mixed biological filter denitrification and water purification device 400, and the electrocoagulation phosphorus removal device 500. Among them, such as... Figure 5As shown, a concrete control cabinet foundation 610 is set on the riverbank, and the control cabinet 600 is fixed on the control cabinet foundation 610. The control cabinet 600 is connected to the electrocoagulation phosphorus removal device 500 through a cable 620. A steel pipe pile 640 is set on the riverbank, and the electrocoagulation phosphorus removal device 500 is connected to the steel pipe pile 640 on the riverbank through a steel wire rope 630 to prevent the electrocoagulation phosphorus removal device 500 from drifting and moving.

[0041] Furthermore, in combination Figures 7-9 As shown, the surface garbage collection device 200 of the river integrated denitrification and phosphorus removal system includes a floating body 210. The top of the floating body 210 is filled with a float 220, which allows the surface garbage collection device 200 to float on the water surface. A filter bucket placement chamber is provided in the floating body 210, and a filter bucket 230 is provided in the filter bucket placement chamber. A water pump connection pipe 240 communicating with the filter bucket placement chamber is provided at the bottom of the floating body 210. The bottom of the floating body 210 is hollow. Water filtered by the filter bucket 230 enters the water pump connection pipe 240. The water pump is connected to the water pump connection pipe 240 through a pipe to achieve water filtration.

[0042] Water baffles 250 are provided on the top left and right sides of the floating body 210, and water inlet plates 260 are provided on the front and rear sides. The water inlet plates 260 are made of a material that can float on the water surface, such as plastic. The bottom of the water inlet plates 260 is rotatably mounted on the water baffles 250, and a magnetic limiting plate 270 is provided on the upper part of the water baffles 250. A corresponding magnetic attraction component is provided on the water inlet plates 260, which is a stainless steel edging inlaid around the perimeter of the water inlet plates 260.

[0043] Combination Figures 7-9 As shown, the water surface garbage collection device 200 operates as follows: When the water pump 300 is pumping water, the water inlet plate 260 tilts towards the filter cartridge 230 under the action of the water flow, and the filter cartridge 230 filters and intercepts garbage on the water surface; when the water pump 300 stops working, the water inlet plate 260 returns to its initial vertical state under the action of buoyancy and is magnetically fixed at the magnetic limiting plate 270, thereby realizing the function of collecting garbage on the water surface.

[0044] Furthermore, in combination Figures 10-12As shown, the gas-liquid mixed biological filter denitrification and water purification device 400 of the river integrated denitrification and phosphorus removal system includes a main box 410. Inside the main box 410, there are a biological filter denitrification zone 411, an ultraviolet zone 412, and an effluent storage zone 413. The internal space of the main box 410 is divided into the biological filter denitrification zone 411, the ultraviolet zone 412, and the effluent storage zone 413 by partitions. The biological filter denitrification zone 411 contains a zeolite tank 420, and zeolite filter plates 421 are respectively installed on the upper and lower sides of the zeolite tank 420. An activated carbon filter plate 430 is installed in the lower part of the denitrification zone 411 of the biological filter, and activated carbon is installed on the activated carbon filter plate 430; a filter perforated plate 414 is installed between the bottom of the denitrification zone 411 of the biological filter and the ultraviolet zone 412, and water at the bottom of the denitrification zone 411 of the biological filter can pass through the filter perforated plate 414 to enter the ultraviolet zone 412. An ultraviolet lamp is installed at the top of the ultraviolet zone 412 for disinfection and sterilization, and an ultraviolet filter plate 415 is installed in the lower part of the ultraviolet zone 412; an overflow baffle 416 is installed between the ultraviolet zone 412 and the effluent storage zone 413. A gas-liquid mixing inlet 440 is located at the top of the denitrification zone 411 of the biological filter. This inlet 440 is connected via a pipe to the upper side of a zeolite filter plate 421 at the bottom of the zeolite tank 420. Water overflows from the zeolite tank 420 to the activated carbon area. After filtration by the activated carbon, the water passes sequentially through the activated carbon filter plate 430 and the filter perforated plate 414 into the ultraviolet zone 412. Water in the ultraviolet zone 412 passes through the ultraviolet filter plate 415 and the overflow baffle 416 into the effluent storage zone 413. A first drain pipe 441 is located at the bottom of the denitrification zone 411 of the biological filter, and a second drain pipe 442 is located at the bottom of the effluent storage zone 413. An overflow pipe 443 and an effluent pipe 444 are located at the top of the effluent storage zone 413. The bottom of the zeolite tank 420 is a sludge storage zone 422. Figure 12 As shown, a conical plate 423 is provided on the upper side of the mud storage area 422. There is a gap between the periphery of the conical plate 423 and the zeolite barrel 420. The mud storage area 422 is provided with a mud discharge pipe 445 that connects to the outside of the main box 410.

[0045] Furthermore, a first Venturi tube and a second Venturi tube are installed on the pipeline between the air pump 300 and the gas-liquid mixed biological filter denitrification and water purification device 400. Both the first and second Venturi tubes have side inlets. The side inlet of the first Venturi tube is connected to a microbial inoculation tank, which is used to add microbial inoculations for removing ammonia nitrogen, such as Bacillus. The side inlet of the second Venturi tube is connected to an air pump, which supplies air. The purpose of installing the first and second Venturi tubes is to introduce liquid microbial inoculations and air through water flow. The structure and working principle of the Venturi tube are mature and known technologies, and will not be elaborated here. In addition, a gas-liquid mixer is also installed between the second Venturi tube and the gas-liquid mixed biological filter denitrification and water purification device 400. This gas-liquid mixer can be a Venturi tube without side inlets, which mixes the liquid and gas through the jet acceleration effect of the Venturi tube.

[0046] The denitrification and water purification principle of the gas-liquid mixed biological filter denitrification and purification device 400 is as follows: Modified clinoptilolite combined with macroporous activated carbon is used as the main packing material. The biofilm attached to the packing material surface utilizes the oxidative decomposition of microorganisms to remove pollutants from landscape rivers, ponds, and other water bodies, especially ammonia nitrogen. To improve the denitrification effect, this device needs to be periodically replenished with Bacillus subtilis and other microorganisms beneficial for ammonia nitrogen removal. The gas-liquid mixed biological filter denitrification and water purification device 400 differs from traditional BAF aerated biological filters in the following ways: ① The aeration pipe and inlet pipe are integrated into one unit, achieving pollutant removal through a special pipeline structure design; ② The prefabricated structure design enables backwashing and sludge collection, and the detachable components facilitate long-term maintenance; ③ The compact design requires minimal space. This device can be placed along riverbanks or the banks of landscape ponds.

[0047] Furthermore, in combination Figures 13-16 As shown, the electrocoagulation phosphorus removal device 500 in the integrated denitrification and phosphorus removal system for the river includes a main frame 510, which is welded from steel pipes. The main frame 510 is surrounded by protective plates 511. An electrode module 520 is installed within the main frame 510. Figure 14 As shown, the electrode module 520 includes multiple electrode plates 521 and conductive screws 522. Each electrode plate 521 is electrically connected to the conductive screw 522. Each electrode plate 521 is connected and fixed by multiple plastic screws 523. One of the two conductive screws 522 is connected to the negative terminal, and the other is connected to the positive terminal. Figure 15As shown, an insulating protective plate 530 for mounting the electrode module 520 is provided in the main frame 510, separating the electrode module 520 from the main frame 510. An aeration module 540 is provided below the electrode module 520 to improve the reaction efficiency of the electrode module 520. An ultrasonic module 550, which is commercially available, is provided at the bottom of the main frame 510 to generate ultrasonic waves. A float module 560 is provided at the top of the main frame 510 to allow the electrocoagulation phosphorus removal device 500 to float on the water surface. The electrocoagulation phosphorus removal device 500 also includes a control module for controlling the operation of the electrode module 520, ultrasonic module 550, and aeration module 540. The control module can be installed in a control cabinet 600. Figure 16 As shown, the aeration module 540 includes an aeration coil 541 with aeration holes distributed on it. The aeration coil 541 is connected to an air inlet pipe 542 and is equipped with an aeration pump connected to the air inlet pipe 542. The aeration pump can be installed on the riverbank or on top of the floating module 560.

[0048] The electrocoagulation phosphorus removal device 500 is used to achieve electrochemical flocculation phosphorus removal in landscape rivers. The installation and working principle of the device 500 are as follows: The main frame 510 is welded from stainless steel, with holes around its perimeter for fixing and assembling other modules; the insulating plate 530 isolates the electrode module 520 from the main frame 510, preventing electrochemical corrosion of the main frame 510; the ultrasonic module 550 promotes the degradation of organic pollutants in the river water and inhibits algae growth; the mechanism of ultrasonic algae removal is to destroy the cell walls of algae, destroy air cells, and destroy active enzymes. Algal cells have a unique structure consisting of an air cell that accounts for 50% of the cell volume. This air cell controls the ascending and descending movement of the algal cell. At appropriate frequencies, the shock waves, jets, and radiation pressures caused by ultrasound can destroy the air cell, causing it to rupture into cavitation bubbles. Simultaneously, the high temperature, high pressure, and large number of free radicals generated by cavitation can destroy the biological enzymes and active substances within the algal cells, thereby affecting the physiological and biochemical activity of the cells.

[0049] The electrode plates in electrode module 520 are made of iron, aluminum, magnesium, or a mixture of various metals. When the conductive screw 522 is energized, under the influence of the electric field, the metal anode (such as iron, aluminum, magnesium, etc.) undergoes an oxidation reaction, releasing metal ions (such as Fe). 2+ Al 3+ Mg 2+ These metal ions react with phosphate ions (PO4) in the water. 3-A chemical reaction occurs, generating insoluble phosphate precipitates (FePO4, AlPO4, Mg3(PO4)2, etc.). Simultaneously, the hydroxides (Fe(OH)3, Al(OH)3) produced by the hydrolysis of metal ions have a large specific surface area, which can adsorb phosphate particles in the water, achieving phosphorus removal through flocculation and sedimentation. The aeration module 540 is used to diffuse the hydroxides produced by the hydrolysis of metal ions, improving flocculation efficiency. The aeration module 540 is fixed to the lower part of the main frame 510 and the upper part of the ultrasonic module 550 using cable ties. The float module 560 provides buoyancy for the entire device and is connected to the main frame 510 as a whole using stainless steel screws and nuts. The control module is mainly used for output control and remote monitoring of current, voltage, and air pump pressure, ensuring the stable and effective operation of the entire device.

[0050] Combination Figure 17 As shown, in another embodiment, the integrated denitrification and phosphorus removal system for the river can also be set up at the dead-end river channel to purify the sewage in the dead-end river channel.

[0051] In one embodiment, a comprehensive river denitrification and phosphorus removal method is provided. This method employs the comprehensive river denitrification and phosphorus removal system described in the previous embodiment, combined with... Figures 18-19 As shown, the construction method includes: (1) By constructing a treatment pond in the river channel, the water in the treatment pond is separated from other water areas in the river channel.

[0052] (2) Install surface garbage collection devices in the river channel outside the treatment pond to collect surface garbage.

[0053] (3) Install a water pump and connect the inlet of the water pump to the surface garbage collection device to pump the sewage after the surface garbage has been filtered out by the surface garbage collection device.

[0054] (4) A gas-liquid mixed biological filter denitrification and water purification device is set up on the riverbank. The outlet of the water pump is connected to the gas-liquid mixed biological filter denitrification and water purification device. The sewage after the surface garbage is filtered out is pumped to the gas-liquid mixed biological filter denitrification and water purification device. The ammonia nitrogen in the sewage is removed by the gas-liquid mixed biological filter denitrification and water purification device. The gas-liquid mixed biological filter denitrification and water purification device is connected to the treatment tank through a pipeline. The water after the ammonia nitrogen is removed flows into the treatment tank.

[0055] (5) Install a first Venturi tube (i.e., ...) on the pipeline of the gas pump and gas-liquid mixed biological filter denitrification and water purification device. Figure 19 Venturi tube 1) and second Venturi tube (i.e. Figure 19 The first Venturi tube (2) and the gas-liquid mixer are connected to a microbial inlet tank on the side. Microbial inlets for removing ammonia nitrogen are added through the microbial inlet tank. The second Venturi tube (2) is connected to an air pump on the side.

[0056] (6) An electrocoagulation phosphorus removal device is installed in the treatment tank to remove phosphorus from the water.

[0057] (7) A control cabinet is installed on the riverbank to supply power and control the water surface garbage collection device, water pump, gas-liquid mixed biological filter denitrification and water purification device, air pump, and electrocoagulation phosphorus removal device.

[0058] Combination Figures 20-21 As shown, the contents of nitrogen, phosphorus, and permanganate at different test points in the landscape river treated by this comprehensive denitrification and phosphorus removal method were significantly reduced; the contents of nitrogen, phosphorus, and chlorophyll inside and outside the enclosure of the dead-end river after treatment by this comprehensive denitrification and phosphorus removal method were significantly reduced. The treated water quality basically meets the requirements. Figure 21 The indicators in Table 1 demonstrate the effectiveness of the integrated nitrogen and phosphorus removal method for wastewater treatment in this river channel.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A comprehensive nitrogen and phosphorus removal system for rivers, characterized in that, include: Enclosures are used to construct treatment ponds in a river channel to separate the water in the treatment ponds from other water areas in the river channel. A surface debris collection device is used to collect surface debris in a river channel located outside the treatment pond. A water pump, the inlet of which is connected to the surface garbage collection device, to pump wastewater after the surface garbage has been filtered out by the surface garbage collection device; The gas-liquid mixed biological filter denitrification and water purification device is connected to the outlet of the water pump to receive the sewage after the surface garbage has been filtered out. The ammonia nitrogen in the sewage is removed by the gas-liquid mixed biological filter denitrification and water purification device, and the water after the ammonia nitrogen is removed flows into the treatment tank. An electrocoagulation phosphorus removal device is used to remove phosphorus from water in the treatment tank. The control cabinet, located on the riverbank, is used to supply power and control the operation of the water pump, the gas-liquid mixed biological filter denitrification and water purification device, and the electrocoagulation phosphorus removal device.

2. The integrated nitrogen and phosphorus removal system for rivers according to claim 1, characterized in that: The water surface garbage collection device includes a floating body, a filter bucket placement chamber in the floating body, a filter bucket in the filter bucket placement chamber, and a water pump connection pipe at the bottom of the floating body that communicates with the filter bucket placement chamber.

3. The integrated nitrogen and phosphorus removal system for rivers according to claim 2, characterized in that: The upper part of the floating body is filled with a float. The top left and right sides of the floating body are respectively provided with baffles, and the front and rear sides are respectively provided with water inlet plates. The water inlet plates are made of a material that can float on the water surface. The bottom of the water inlet plates is rotatably mounted on the baffles, and a magnetic limiting plate is provided on the upper part of the baffles. The water inlet plates are correspondingly provided with magnetic suction components.

4. The integrated nitrogen and phosphorus removal system for rivers according to claim 1, characterized in that: The gas-liquid mixed biological filter denitrification and water purification device includes a main body. Inside the main body, there are a biological filter denitrification zone, an ultraviolet (UV) zone, and an effluent storage zone. The biological filter denitrification zone contains a zeolite tank with a zeolite filter plate inside. The biological filter denitrification zone also contains an activated carbon filter plate with activated carbon. A perforated filter plate is located between the bottom of the biological filter denitrification zone and the UV zone. The UV zone contains UV lamps and a UV filter plate. An overflow baffle is located between the UV zone and the effluent storage zone. The top of the denitrification zone of the biological filter is equipped with a gas-liquid mixing inlet, which is connected to the bottom of the zeolite tank through a pipe. Water in the zeolite tank overflows into the area where the activated carbon is located. After being filtered by the activated carbon, the water passes through the activated carbon filter plate and the filter perforated plate in sequence before entering the ultraviolet zone. The water in the ultraviolet zone passes through the ultraviolet zone filter plate and the overflow baffle before entering the effluent storage area. A first drain pipe is provided at the bottom of the denitrification zone of the biological filter; a second drain pipe is provided at the bottom of the effluent storage zone; an overflow pipe and an effluent pipe are provided at the top of the effluent storage zone; the bottom of the zeolite tank is a sludge storage zone, and the sludge storage zone is provided with a sludge discharge pipe that connects to the outside of the main tank.

5. The integrated nitrogen and phosphorus removal system for rivers according to claim 4, characterized in that: The air pump and the gas-liquid mixed biological filter denitrification and water purification device are connected by a first Venturi tube and a second Venturi tube. The side inlet of the first Venturi tube is connected to a microbial inoculation tank, which is used to add microbial inoculation for removing ammonia nitrogen. The side inlet of the second Venturi tube is connected to an air pump.

6. The integrated nitrogen and phosphorus removal system for rivers according to claim 5, characterized in that: A gas-liquid mixer is also provided between the second Venturi tube and the gas-liquid mixed biological filter denitrification and water purification device.

7. The integrated nitrogen and phosphorus removal system for rivers according to claim 1, characterized in that: The electrocoagulation phosphorus removal device includes a main frame, within which an electrode module is provided. Each electrode module comprises multiple electrode plates and a conductive screw, with each electrode plate electrically connected to the conductive screw. An insulating protective plate is provided within the main frame for mounting the electrode module. An aeration module is located below the electrode module. An ultrasonic module is located at the bottom of the main frame, and a floating module is located at the top of the main frame. The electrocoagulation phosphorus removal device also includes a control module for controlling the operation of the electrode module, ultrasonic module, and aeration module.

8. The integrated nitrogen and phosphorus removal system for rivers according to claim 7, characterized in that: The aeration module includes an aeration coil with aeration holes distributed on it. The aeration coil is connected to an air inlet pipe and is equipped with an aeration pump connected to the air inlet pipe.

9. The integrated nitrogen and phosphorus removal system for rivers according to claim 1, characterized in that: The enclosure and the riverbank together form the treatment pool; the electrocoagulation phosphorus removal device is connected to the steel pipe piles on the riverbank by steel wire ropes.

10. A comprehensive nitrogen and phosphorus removal method for river channels, characterized in that, include: By constructing a treatment pond within the river channel, the water in the treatment pond is separated from other water areas in the river channel; A surface waste collection device is deployed in the river channel outside the treatment pond to collect surface waste. A water pump is installed, and the inlet of the water pump is connected to the surface garbage collection device to pump the sewage after the surface garbage has been filtered out by the surface garbage collection device. A gas-liquid mixed biological filter denitrification and water purification device is installed on the riverbank. The outlet of the water pump is connected to the gas-liquid mixed biological filter denitrification and water purification device. Wastewater after surface debris has been filtered out is pumped to the gas-liquid mixed biological filter denitrification and water purification device, where ammonia nitrogen is removed from the wastewater. The gas-liquid mixed biological filter denitrification and water purification device is connected to the treatment tank through a pipeline, and the water after ammonia nitrogen removal flows into the treatment tank. A first Venturi tube, a second Venturi tube, and a gas-liquid mixer are installed on the pipeline between the air pump and the gas-liquid mixing biological filter denitrification and water purification device. The side inlet of the first Venturi tube is connected to a microbial inoculation tank, through which microbial inoculation for removing ammonia nitrogen is added. The side inlet of the second Venturi tube is connected to an air pump. An electrocoagulation phosphorus removal device is installed in the treatment tank, and the water is treated to remove phosphorus through the electrocoagulation phosphorus removal device; A control cabinet is installed on the riverbank to supply power and control the operation of the surface garbage collection device, water pump, gas-liquid mixed biological filter denitrification and water purification device, air pump, and electrocoagulation phosphorus removal device.

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