A system and method for accelerating phosphorus release from contaminated sediment by increasing surface sediment temperature

Abstract

The present invention discloses a system and method for accelerating the release of phosphorus in contaminated sediment by increasing the temperature of surface sediment, comprising an isolation cover, a sealed base installed below the isolation cover, a heating unit that provides a heat source for a heating pipe on the sealed base, and steps of installing the isolation cover, providing heat for the heating pipe in the isolation cover, accelerating the release of phosphorus substances, and recycling and utilizing the principles and steps. In the present invention, a heating pipe that can be inserted into the surface of the sediment is installed at the bottom of the isolation cover, and heat is provided to the heating pipe by a geothermal system to increase the temperature of the surface sediment, promote the release of phosphorus in the sediment, and realize the transformation of nutrient substances in the sediment into treasure by means of the adsorption layer in the isolation cover; in addition, during specific implementation, the heating pipe is designed to be a porous structure, which, on the one hand, uses the temperature of the water column to increase the temperature of the surface sediment and promote the release of enriched sediment phosphorus; in addition, the jet velocity of the water column is used to increase the mixing of the sediment and the water body, thereby indirectly promoting the release of phosphorus in the sediment.

Description

Technical Field

[0001] The invention relates to the technical field of water body bottom mud eutrophication treatment, and in particular to a method for accelerating the release of phosphorus from contaminated bottom mud by increasing the temperature of surface bottom mud. Background Art

[0002] Large amounts of nitrogen and phosphorus released from production and daily life enter natural water bodies through runoff, contributing to eutrophication in rivers and lakes and accumulating in sediments. When factors such as dissolved oxygen, water temperature, and pH in the overlying water change, phosphorus in the sediments is released again, becoming an endogenous source of water pollution. On the other hand, phosphorus is also an indispensable, irreplaceable, and non-renewable strategic resource. Therefore, the reduction, restoration, and recycling of phosphorus in lake and reservoir sediments is of great significance both from the perspective of eutrophication control and resource utilization.

[0003] Currently, the main approaches to managing high-load phosphorus accumulation in lake sediments include ex situ and in situ control technologies. Ex situ control involves dredging lake sediment from the water body and then treating or recovering the sediment phosphorus through leaching, electroremediation, and other methods. However, ex situ control is labor-intensive, causes significant water disturbance, and results in large sediment accumulations, making it difficult to promote and apply. In situ control involves adding a layer of environmentally friendly, pollution-free covering material or spraying chemicals into the lake water body to inhibit the release of sediment phosphorus into the water body through physical, chemical, and biological effects. However, this technology has failed to achieve the reduction, remediation, and resource recovery of high-load sediment phosphorus.

[0004] The above problems have been well solved in the invention patent "A device and method for accelerating the release and recycling of endogenous phosphorus in eutrophic water" (authorization number: ZL202210554452.9) previously applied by the inventor. However, it was found during the application process that for low-dissolved oxygen water bodies, the release of bottom mud phosphorus into the bottom mud pore water and its overlying water was slow; in addition, the environmentally friendly phosphorus adsorption material was not in sufficient contact with the overlying water, and the slow phosphorus adsorption and recovery further affected the endogenous release of bottom mud phosphorus. Therefore, for the accelerated release and recycling of endogenous phosphorus in low-dissolved oxygen water bodies, the existing devices and methods are not effective and have low universality. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment, thereby solving the problem of how to accelerate the release of phosphorus from contaminated sediment by increasing the temperature, and being more environmentally friendly and energy-saving.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides a method for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment, comprising:

[0008] The isolation cover comprises a permeable layer in contact with the mud-water cross section, a sealing layer located at the outermost layer, and an adsorption layer filled between the permeable layer and the sealing layer;

[0009] The sealing base is an annular structure connected to the bottom of the isolation cover, the lower end of which is inserted into the bottom mud layer. A support frame is provided in the sealing base, and a plurality of heating pipes are vertically provided on the support frame;

[0010] The heating unit includes a geothermal buried pipe, a water injection pipe assembly arranged at the upper end of the geothermal buried pipe, a hot water outlet pipe sealed and inserted in the center of the geothermal buried pipe, and a booster pump connected to the hot water outlet pipe, wherein the water outlet end of the booster pump is connected to each of the heating pipes.

[0011] Furthermore, a support rod is provided between the inner top of the isolation cover and the support frame, and a lifting lug is provided on the top of the isolation cover for facilitating lifting.

[0012] Furthermore, the adsorption layer is an environmentally friendly material that can adsorb phosphorus dissolved in water, and after adsorption, it can be used as a phosphate fertilizer in agricultural production.

[0013] Furthermore, the support frame includes a plurality of annular supports with successively decreasing radii, and a heating tube is evenly spaced at an angle on each of the annular supports.

[0014] Furthermore, the heating pipe is a hollow pipe, the lower end of which is a pointed blind pipe, and a plurality of water spray holes are evenly opened on its outer wall. The top of the heating pipe passes through the top of the annular bracket and is fixedly connected to the annular bracket, wherein the upper end of each of the heating pipes is connected to the water outlet end of the booster pump through a branch pipe.

[0015] Furthermore, a water outlet pipe is connected to the water outlet end of the booster pump, and the water outlet pipe is connected to each of the temperature increasing pipes through a booster water pipe;

[0016] The temperature increasing pipes are connected via series branch pipes;

[0017] Alternatively, the temperature increasing pipe is connected to the pressurized water pipe via a connecting branch pipe.

[0018] Furthermore, the water injection pipe assembly includes a water supply tank connected to the upper end of the geothermal buried pipe, a pressure gauge for detecting the pressure of the water supply tank, and a water injection pipe provided on the side wall of the water supply tank.

[0019] Furthermore, the outer diameter of the hot water outlet pipe is smaller than the inner diameter of the geothermal buried pipe, and a corrector is provided on the outside of the hot water outlet pipe to contact the inner wall of the geothermal buried pipe; a water inlet hole for hot water to enter is provided at the bottom of the hot water outlet pipe; and an exhaust hole is provided on the top side wall of the geothermal buried pipe.

[0020] A method for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment comprises the following steps:

[0021] S1. Install the isolation cover

[0022] First, determine the depth of the water overlying the lake sediment, adjust the hooked robotic arm on the boat or shore to a length that matches the water depth, and install a lifting lug on the top of the isolation cover to facilitate lifting. When in use, use a crane to lift the isolation cover to the desired position.

[0023] Slowly insert the sealing base and the heating pipe on the support frame into the bottom mud, thereby forming a relatively sealed structure between the sealing base and the isolation cover in the water body;

[0024] S2. Simultaneously with step S1, using the water injection pipe assembly to provide water supply to the geothermal buried pipe, wherein the hot water flowing to the bottom of the geothermal buried pipe exchanges heat with geothermal energy, thereby increasing its temperature, and the hot water is pumped out through the hot water outlet pipe and the booster pump;

[0025] S3. The hot water extracted in S2 is injected into each of the warming pipes through the series branch pipes, and the bottom mud layer is heated and stirred through the water spray holes on the side walls of the warming pipes; after heating for a certain period of time, the phosphate fertilizer is recovered, and after the isolation adsorption layer is saturated with phosphorus, the phosphorus adsorption material is poured out using a robotic arm on the ship or the shore and used as phosphate fertilizer in agricultural production.

[0026] Furthermore, after step S1, an oxygen removal step and a stirring step are designed;

[0027] In the oxygen removal step, nitrogen is injected into the isolation hood through an air injection pipe using a nitrogen generator for 1-2 consecutive days to ensure that an anaerobic environment is generated in the enclosed space of the isolation hood at the mud-water interface, and the dissolved oxygen is reduced from 7-9 mg / L to 1-2 mg / L, thereby promoting the continuous release of phosphorus from the bottom mud into a small amount of water in the enclosed space of the isolation hood, while the phosphorus adsorption material in the adsorption layer continuously enriches the phosphorus released into the water;

[0028] The stirring step comprises using a stirring mechanism to intermittently stir the bottom mud covered by the isolation cover, once every two days, and stirring for 1-2 hours each time; after an anaerobic environment is generated in the enclosed space of the isolation cover at the mud-water interface, power blades are installed, and the power blades drive the stirring blades to rotate under the action of wind, thereby accelerating the release of phosphorus in the bottom mud by disturbing the enclosed water body and the surface bottom mud, and promoting the adsorption layer to enrich the phosphorus released into the water.

[0029] Compared with the prior art, the present invention has the following beneficial technical effects:

[0030] In the present invention, a heating pipe that can be inserted into the bottom mud layer is installed at the bottom of the isolation cover, and the geothermal system is used to provide heat for the heating pipe to increase the temperature of the bottom mud layer, promote the release of phosphorus-containing substances, and use the adsorption layer in the isolation cover to realize the transformation of nutrient substances in the bottom mud into treasure.

[0031] In addition, during specific implementation, the heating pipe is designed as a porous structure. On the one hand, the water temperature of the water column is used to increase the temperature of the bottom mud layer to promote the release of phosphorus substances; on the other hand, the jet velocity of the water column is used to increase the mixing of the bottom mud and the water body, thereby indirectly promoting the release of phosphorus substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure designed in the method of accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment in the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the structure of the intermediate isolation cover;

[0035] Figure 3 This is a schematic diagram of a heating water spray pipe provided within the isolation cover structure;

[0036] Figure 4 A schematic diagram of another embodiment of a heating water spray pipe provided within an isolation cover structure;

[0037] Figure 5 This is a schematic diagram of the geothermal energy utilization structure used in the method of accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment in the present invention;

[0038] Figure 6 This is a schematic diagram of the arrangement of the heating pipes in the method of accelerating the release of phosphorus from contaminated sediment by heating the surface sediment of the present invention;

[0039] Figure 7 This is a graph showing experimental data of the release rate and flux of phosphorus from sediment to water bodies as a function of temperature in the present invention.

[0040] Explanation of the accompanying drawings: 1. Isolation cover; 101. Lifting ear; 102. Support rod; 2. Sealing base; 3. Support frame; 301. Ring bracket; 4. Heating pipe; 401. Water spray hole; 402. Tip blind pipe; 5. Booster water pipe; 501. Series branch pipe; 502. Connecting branch pipe; 6. Water outlet pipe; 7. Booster pump; 8. Water injection pipe assembly; 801. Pressure gauge; 802. Water injection pipe; 803. Geothermal buried pipe; 9. Hot water outlet pipe; 901. Corrector. DETAILED DESCRIPTION

[0041] Example 1

[0042] This embodiment discloses a method for accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment, comprising an isolation cover 1, a sealing base 2 installed below the isolation cover 1, and a heating unit that provides a heat source for a heating pipe on the sealing base 2;

[0043] In this embodiment, the isolation cover 1 includes a permeable layer in contact with the mud-water cross section, a sealing layer located at the outermost layer, and an adsorption layer filled between the permeable layer and the sealing layer;

[0044] In this embodiment, a support rod 102 is installed between the inner top of the isolation cover 1 and the support frame 3, for the purpose of connecting and supporting the support frame 3 and the isolation cover 1;

[0045] A lifting lug 101 is installed on the top of the isolation cover 1 for easy lifting. When in use, the isolation cover 1 is lifted to the desired position by a crane.

[0046] In this embodiment, the adsorption layer is an environmentally friendly material that can adsorb dissolved phosphorus in water. After adsorption, it can be used as a phosphate fertilizer for agricultural production, thereby achieving the effect of turning waste into treasure.

[0047] In this embodiment, the sealing base 2 is an annular structure connected to the bottom of the isolation cover 1, and its lower end is inserted into the bottom mud layer. Specifically, the sealing base 2 includes an annular plate connected to the bottom of the isolation cover 1, and an annular cover cylinder is installed below the annular plate. The annular cover cylinder can be inserted into the bottom mud layer, thereby forming a relatively sealed structure between the isolation cover 1 and the water body.

[0048] In this embodiment, a support frame 3 is installed in the sealing base 2, and a plurality of heating pipes 4 are vertically installed on the support frame 3;

[0049] like Figure 6As shown, the support frame 3 includes a plurality of annular supports 301 with successively decreasing radii, and a heating tube 4 is evenly spaced and installed on each of the annular supports 301. Each of the annular supports 301 is fixed on a "cross" structure, and a support rod 102 connected to the isolation cover 1 is installed at the center of the "cross".

[0050] In this embodiment, Figure 3 and Figure 4 As shown, the heating pipe 4 is a hollow pipe, the lower end of which is a pointed blind pipe 402, and a plurality of water spray holes 401 are evenly opened on the outer wall of the heating pipe 4. The top of the heating pipe 4 passes through the top of the annular bracket 301 and is fixedly connected to the annular bracket 301, wherein the upper end of each heating pipe 4 is connected to the water outlet end of the booster pump 7 through a branch pipe; specifically, the water spray holes 401 on the outer wall of the heating pipe 4 are used to form a jet water column. On the one hand, the water temperature of the water column is used to increase the temperature of the bottom mud layer to promote the release of phosphorus substances; in addition, the jet velocity of the water column is used to increase the mixing of the bottom mud and the water body, thereby indirectly promoting the release of phosphorus substances.

[0051] In this embodiment, the heating unit includes a geothermal buried pipe 803, a water injection pipe assembly 8 installed at the upper end of the geothermal buried pipe 803, a hot water outlet pipe 9 sealed and inserted in the center of the geothermal buried pipe 803, and a booster pump 7 connected to the hot water outlet pipe 9, wherein the water outlet end of the booster pump 7 is connected to each of the heating pipes 4;

[0052] like Figure 5 As shown, the water injection pipe assembly 8 includes a water supply box connected to the upper end of the geothermal buried pipe 803, a pressure gauge 801 for detecting the pressure of the water supply box, and a water injection pipe 802 installed on the side wall of the water supply box;

[0053] The outer diameter of the hot water outlet pipe 9 is smaller than the inner diameter of the geothermal buried pipe 803, and a corrector 901 is installed on the outside of the hot water outlet pipe 9 to contact the inner wall of the geothermal buried pipe 803 to ensure the verticality of the geothermal buried pipe 803; a water inlet hole for hot water to enter is opened at the bottom of the hot water outlet pipe 9, which is used to replenish the hot water to be exchanged, specifically, filtered lake water can be used for treatment; an exhaust hole is opened on the top side wall of the geothermal buried pipe 803.

[0054] like Figure 1 As shown, in this embodiment, the outlet end of the booster pump 7 is connected to a water outlet pipe 6, and the water outlet pipe 6 is connected to each of the heating pipes 4 through the booster water pipe 5; wherein each of the heating pipes 4 is connected through a series branch pipe 501;

[0055] Specifically, the temperature increasing pipe 4 may be connected to the pressurized water pipe 5 through a connecting branch pipe 502 .

[0056] In this embodiment, a method for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment comprises the following steps:

[0057] S1. Install the isolation cover

[0058] First, determine the depth of the water overlying the lake sediment, adjust the hooked mechanical arm on the boat or the shore to a length that matches the water depth, install a lifting lug 101 on the top of the isolation cover 1 to facilitate lifting, and when in use, use a crane to lift the isolation cover 1 to the desired position, and then vertically place the isolation cover 1 into the water body;

[0059] The sealing base 2 and the heating pipe 4 on the support frame 3 are slowly inserted into the bottom mud, thereby forming a relatively sealed structure between the sealing base 2 and the isolation cover 1 in the water body.

[0060] S2. Simultaneously with step S1, the water injection pipe assembly 8 is used to supply water to the geothermal buried pipe 803. The hot water flowing to the bottom of the geothermal buried pipe 803 exchanges heat with geothermal energy, thereby increasing its temperature. The hot water is then pumped out through the hot water outlet pipe 9 and the booster pump 7.

[0061] S3. The hot water extracted in S2 is injected into each of the warming pipes 4 through the series branch pipes 501, and the bottom mud layer is heated and stirred along with the water spray holes 401 on the side walls of the warming pipes 4. After heating for a certain period of time, the phosphate fertilizer is recovered. After the adsorption layer is saturated with phosphorus, the device is pulled out using a robotic arm on the ship or the shore, and the phosphorus adsorption material is poured out and used as phosphate fertilizer in agricultural production.

[0062] In specific implementation, after step S1, an oxygen removal step and a stirring step are designed;

[0063] In the oxygen removal step, nitrogen is injected into the isolation cover 1 through the gas injection pipe using a nitrogen generator for 1-2 consecutive days to ensure that an anaerobic environment is generated in the closed space of the isolation cover at the mud-water interface, and the dissolved oxygen is reduced from 7-9 mg / L to 1-2 mg / L, thereby promoting the continuous release of phosphorus in the bottom mud into a small amount of water in the closed space of the isolation cover. At the same time, the phosphorus adsorption material in the adsorption layer continuously enriches the phosphorus released into the water.

[0064] The stirring step is to use a stirring mechanism to intermittently stir the bottom mud covered by the isolation cover 1, once every two days, and each stirring time is 1-2 hours; after an anaerobic environment is generated in the enclosed space of the mud-water interface isolation cover, a power blade is installed. The power blade drives the stirring blade to rotate under the action of wind, and accelerates the release of phosphorus in the bottom mud by disturbing the enclosed water body and the surface bottom mud, and promotes the adsorption layer to enrich the phosphorus released into the water.

[0065] The release rate and flux of sediment phosphorus into water bodies increase with increasing temperature.

[0066] Example 2

[0067] In this embodiment, improvements are made based on Example 1;

[0068] Specifically, the heating pipes 4 are replaced with closed blind pipes, wherein a water inlet pipe and a water outlet pipe are installed on the heating pipes 4;

[0069] At the same time, the water inlet pipes on the heating pipe 4 are connected to the boosting water pipe 5 respectively; the water outlet pipes on the heating pipe 4 are connected to the water injection pipe 802 through pipelines, so that the water that has undergone heat exchange flows back to the water injection pipe assembly 8, thereby preventing the water temperature from being too high and affecting the water temperature environment of the water body and its impact on its organisms.

[0070] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A system for accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment, characterized in that: include: An isolation cover (1) comprises a permeable layer in contact with a mud-water interface, a sealing layer located at the outermost layer, and an adsorption layer filled between the permeable layer and the sealing layer; A sealing base (2) is an annular structure connected to the bottom of the isolation cover (1), the lower end of which is inserted into the bottom mud layer, a support frame (3) is provided in the sealing base (2), and a plurality of heating pipes (4) are vertically provided on the support frame (3); A heating unit, comprising a geothermal buried pipe (803), a water injection pipe assembly (8) arranged at the upper end of the geothermal buried pipe (803), a hot water outlet pipe (9) sealed and inserted in the center of the geothermal buried pipe (803), and a booster pump (7) connected to the hot water outlet pipe (9), wherein the water outlet end of the booster pump (7) is connected to each of the temperature-increasing pipes (4); The support frame (3) includes a plurality of annular supports (301) with successively decreasing radii. The heating pipe (4) is a hollow pipe, the lower end of which is a tip blind pipe (402). A plurality of water spray holes (401) are evenly opened on the outer peripheral wall of the heating pipe (4). The top of the heating pipe (4) passes through the top of the annular support (301) and is fixedly connected to the annular support (301). The upper end of each of the heating pipes (4) is connected to the water outlet of the booster pump (7) through a branch pipe.

2. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 1, characterized in that: A support rod (102) is provided between the inner top of the isolation cover (1) and the support frame (3), and a lifting lug (101) for facilitating lifting is provided on the top of the isolation cover (1).

3. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 2, characterized in that: The adsorption layer is an environmentally friendly material that can adsorb phosphorus dissolved in water, and after adsorption, it can be used as a phosphorus fertilizer for agricultural production.

4. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 2, characterized in that: Temperature increasing tubes (4) are arranged at evenly spaced angles on each of the annular supports (301).

5. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 1, characterized in that: A water outlet pipe (6) is connected to the water outlet end of the boosting pump (7), and the water outlet pipe (6) is connected to each of the temperature increasing pipes (4) through the boosting water pipe (5); The temperature increasing pipes (4) are connected to each other via series branch pipes (501); Or / and, the temperature increasing pipe (4) is connected to the pressurized water pipe (5) via a connecting branch pipe (502).

6. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 1, characterized in that: The water injection pipe assembly (8) comprises a water supply tank connected to the upper end of the geothermal buried pipe (803), a pressure gauge (801) for detecting the pressure of the water supply tank, and a water injection pipe (802) provided on the side wall of the water supply tank.

7. The system for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 6, characterized in that: The outer diameter of the hot water outlet pipe (9) is smaller than the inner diameter of the geothermal buried pipe (803), and a corrector (901) is provided on the outside of the hot water outlet pipe (9) and contacts the inner wall of the geothermal buried pipe (803); a water inlet hole for hot water to enter is provided at the bottom of the hot water outlet pipe (9); and an exhaust hole is provided on the top side wall of the geothermal buried pipe (803).

8. A method for accelerating the release of phosphorus from contaminated sediment by increasing the temperature of surface sediment, according to any one of claims 1 to 7, characterized in that: The steps include: S1. Install the isolation cover First, determine the depth of the water overlying the lake bottom mud, adjust the hooked mechanical arm on the boat or the shore to a length that matches the water depth, lift the isolation cover (1) to the desired position, and then vertically place the isolation cover (1) into the water body; Slowly inserting the sealing base (2) and the heating pipe (4) on the support frame (3) into the bottom mud to form a relatively sealed structure in the water body; S2. Simultaneously with step S1, the water injection pipe assembly (8) is used to supply water to the geothermal buried pipe (803), wherein the hot water flowing from the geothermal buried pipe (803) to the bottom of the geothermal buried pipe (803) exchanges heat with geothermal energy, thereby increasing the temperature, and the hot water is pumped out through the hot water outlet pipe (9) and the booster pump (7); S3, injecting the hot water extracted from S2 into each of the heating pipes (4) through the series branch pipes (501), and heating and stirring the bottom mud layer along with the water spray holes (401) on the side walls of the heating pipes (4); after heating for a certain period of time, recovering the phosphate fertilizer, and after the adsorption layer is saturated with phosphorus, using a mechanical arm on the ship or the shore, pulling out the device, pouring out the phosphorus adsorption material, and using it as phosphate fertilizer in agricultural production.

9. The method for accelerating phosphorus release from contaminated sediment by increasing the temperature of surface sediment according to claim 8, characterized in that: After step S1, an oxygen removal step and a stirring step are designed; In the oxygen removal step, nitrogen is injected into the isolation cover (1) through the gas injection pipe using a nitrogen generator, and the nitrogen injection is continued for 1-2 days; ensuring that an anaerobic environment is generated in the closed space of the isolation cover at the mud-water interface, and the dissolved oxygen is reduced from 7-9 mg / L to 1-2 mg / L, thereby promoting the continuous release of phosphorus in the bottom mud into a small amount of water in the closed space of the isolation cover, and at the same time, the phosphorus adsorption material in the adsorption layer continuously enriches the phosphorus released into the water; The stirring step comprises using a stirring mechanism to intermittently stir the bottom mud covered by the isolation cover (1), once every two days, and stirring for 1-2 hours each time; after generating an anaerobic environment in the closed space of the isolation cover at the mud-water interface, installing power blades, which drive the stirring blades to rotate under the action of wind, thereby accelerating the release of phosphorus in the bottom mud by disturbing the closed water body and the surface bottom mud, and promoting the adsorption layer to enrich the phosphorus released into the water.

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