River sewage in-situ purification and water resource recycling method based on microbial enhancement

Abstract

The invention provides a method for in-situ purification of river sewage and cyclic utilization of water resources based on microbial enhancement, and relates to the technical field of sewage treatment.The device comprises an annular intercepting plate b, and a circle of interactive openings b communicated with the inner circumferential surface of the annular intercepting plate b are formed in the outer circumferential surface of the annular intercepting plate b in an annular array shape; the top end face and the bottom end face of the annular intercepting plate b are each fixedly provided with a closing plate, the inner circumferential face of the annular intercepting plate b and the two closing plates jointly form a purification cavity, and the purification cavity is filled with a plurality of microbial carriers b. According to the invention, the in-situ purification of river sewage and the cyclic utilization of water resources are realized through microbial enhanced purification, flexible adjustment of the number of the purification assemblies, and the synergistic effect of various modes such as position movement and plant-assisted purification by using the bait simulation piece; the problems that an existing river sewage treatment device is poor in adaptability to different river water area depths, and different water layers are difficult to fully purify in deep water areas are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a method for in-situ purification of river sewage and recycling of water resources based on microbial enhancement. Background Art

[0002] With the acceleration of urbanization and industrialization, a large amount of industrial wastewater and domestic sewage are discharged into rivers without effective treatment, resulting in deterioration of river water quality and serious damage to the ecological environment. Sewage in rivers usually contains a large amount of organic matter, nitrogen, phosphorus and other pollutants, which not only lead to eutrophication of water bodies and cause algae outbreaks, but also threaten the survival of aquatic organisms, thus affecting the balance of the entire ecosystem.

[0003] Existing river sewage treatment devices have many limitations in practical applications, which seriously affect the effect and scope of sewage purification. On the one hand, due to the large differences in the depth of water in different rivers, the existing devices have poor adaptability to different river water depths. In deeper waters, it is difficult to achieve sufficient purification treatment in different water layers, so that sewage in deeper locations cannot be effectively purified, and pollutants in sewage such as organic matter, nitrogen, phosphorus, etc. cannot be fully removed, thus affecting the overall water quality improvement effect.

[0004] On the other hand, existing river sewage treatment devices are often fixed at a specific location, which greatly limits their purification area, thereby reducing the purification effect and scope of sewage, and failing to achieve comprehensive purification of river sewage, which is not conducive to the overall improvement of the river ecological environment and the effective protection of water resources. Summary of the invention

[0005] The present invention relates to a method for in-situ purification of river sewage and recycling of water resources based on microbial enhancement, which solves the problem that existing river sewage treatment devices have poor adaptability to different river water depths, are difficult to fully purify different water layers in deeper waters, and are often fixed in specific locations, resulting in limited purification areas, which seriously affects the sewage purification effect and range, and is not conducive to the improvement of the river ecological environment and the protection of water resources.

[0006] The present invention provides an in-situ purification device for river sewage and water resource recycling based on microbial enhancement, which specifically comprises: an annular interception plate b, wherein the outer peripheral surface of the annular interception plate b is provided with a circle of interactive openings b connected with its inner peripheral surface in an annular array shape; a closing plate is fixedly installed on the top end surface and the bottom end surface of the annular interception plate b, the closing plate is coaxially arranged with the annular interception plate b, and the diameter of the closing plate is consistent with the outer diameter of the annular interception plate b; the inner peripheral surface of the annular interception plate b and the two closing plates together form a purification cavity, and the purification cavity is filled with a plurality of microbial carriers b, and the microbial carriers b It is an activated carbon ball, and microorganisms for water purification are cultivated inside it; on the plane facing outward of the closing plate, several groups of bait simulation pieces b are fixedly installed in a uniformly distributed manner, and the bait simulation pieces b are made of TPR material, and their overall appearance is similar to that of earthworms; on the plane facing outward of the closing plate, six connecting rings b are fixedly installed in a circular array adjacent to the edge part in the shape of an annular array; the annular intercepting plate b, the interactive opening b, the closing plate, the connecting ring b, the bait simulation piece b and the microorganism carrier b together constitute a purification component, and the number of purification components is not limited to one group, and its number can be increased.

[0007] Furthermore, when two adjacent groups of purification components are connected, two connecting rings b in corresponding upper and lower positions in the two groups of purification components are connected in series through a connecting rope; the connecting rope passes through the corresponding connecting ring b on the bottom closing plate of the upper purification component and the corresponding connecting ring b on the top closing plate of the lower purification component in sequence, and the two connecting rings b are firmly connected by knotting.

[0008] Furthermore, it also includes an annular float, wherein an inner shell is provided in the central area of ​​the annular float, the inner shell is in a circular shell structure, the outer circumference of the inner shell is fixedly connected to the inner circumference of the annular float, and an annular interception plate a is fixedly installed on the bottom end surface of the inner shell, the annular interception plate a is coaxially arranged with the inner shell, and the diameter of the annular interception plate a is smaller than the diameter of the inner shell.

[0009] Furthermore, the outer circumference of the annular interception plate a is provided with a circle of interactive openings a connected to its inner circumference in the shape of an annular array; a bottom sealing plate is fixedly installed on the bottom end surface of the annular interception plate a, the bottom sealing plate is coaxially arranged with the annular interception plate a, and the diameter of the bottom sealing plate is consistent with the outer diameter of the annular interception plate a.

[0010] Furthermore, the inner circumferential surface of the annular intercepting plate a, the top surface of the bottom sealing plate and the bottom surface of the built-in shell together form a purification cavity, and the purification cavity is filled with a plurality of microbial carriers a, which are activated carbon balls, and microorganisms for water purification are cultivated therein.

[0011] Furthermore, six connecting rings a are fixedly installed in a circular array adjacent to the edge portion on the bottom end surface of the bottom sealing plate; when the annular float is connected to the purification component, the connecting rings a and b at corresponding upper and lower positions in the annular float and the purification component are connected in series through a connecting rope; the connecting rope passes through the connecting ring a and the corresponding connecting ring b on the top closing plate of the purification component in turn, and the connecting ring a and the connecting ring b are firmly connected by knotting.

[0012] Furthermore, a plurality of groups of bait simulation pieces a are fixedly mounted on the bottom end surface of the bottom sealing plate in a uniformly distributed manner. The bait simulation pieces a are made of TPR material, and their overall appearance is similar to that of earthworms.

[0013] Furthermore, a cultivation trough is provided at the axial center of the top end surface of the built-in shell, and the cultivation trough is a circular trough structure. The cultivation trough is filled with a cultivation carrier, and the cultivation carrier is made of coconut bran and peat soil; the bottom end surface of the cultivation trough is provided with a circle of root guide openings penetrating the bottom end surface of the built-in shell in a circular array shape, and the inner circle diameter formed by the root guide openings is larger than the outer diameter of the annular interception plate a.

[0014] The present invention provides a method for in-situ purification of river sewage and recycling of water resources based on microbial enhancement, which has the following beneficial effects: The present invention adopts microorganisms to purify sewage in an enhanced manner. A plurality of purification cavities are set up, and activated carbon balls are filled in the purification cavities. A carrier of microorganisms for water purification is cultivated inside. When sewage flows into the purification cavity, the huge specific surface area of ​​the activated carbon balls provides abundant attachment sites for the microorganisms, so that the microorganisms can multiply in large numbers and form biofilms. Pollutants in the sewage, such as organic matter, nitrogen, phosphorus, etc., are decomposed and transformed by the metabolism of the microorganisms during contact with the biofilm, thereby achieving sewage purification treatment and realizing small-scale recycling of water resources in the river channel, reducing dependence on external water resources and improving the utilization rate of water resources.

[0015] The present invention adopts plant-assisted purification. By cultivating aquatic plants, the plants absorb nutrients such as nitrogen and phosphorus from the water through their roots, thereby further reducing the pollutant content in the water body. Through the root guide openings opened on the bottom end surface of the cultivation trough, the roots of the aquatic plants can grow downward through the root guide openings and penetrate into the sewage in the purification cavity, synergizing with microorganisms to jointly purify the sewage, thereby promoting the circulation of water resources in the ecosystem.

[0016] The number of purification components of the present invention can be increased or decreased, so that the number of purification components can be flexibly adjusted according to the depth of the water area. According to the depth difference of different river water areas, the number of purification components can be reduced in shallower water areas, and the number of purification components can be increased in deeper water areas, ensuring that a group of purification components can be placed at different depths of the water area, so that sewage can be fully purified in different water layers, thereby improving the adaptability of the device to different water environments.

[0017] The present invention utilizes bait simulation components to realize the movement of the device position. By installing several groups of bait simulation components whose overall appearance is similar to that of earthworms, a strong attraction is generated for fish, so that when the fish are attracted by the bait simulation components and peck at them, a certain external force is generated on the device, thereby driving the device to realize the movement of position in the river channel. Through this position movement, the device can cover a larger range of water areas, avoiding the problem of purification area limitation caused by the fixation of the device, allowing the device to more fully contact the sewage, and further improving the sewage purification effect and range.

[0018] In summary, the present invention achieves in-situ purification of river sewage and recycling of water resources through the synergistic effect of multiple methods such as microbial enhanced purification, flexible adjustment of the number of purification components, use of bait simulation parts to achieve position movement, and plant-assisted purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 The main structural diagram of the present application is shown; Figure 2 The top axonometric structure diagram of the present application is shown; Figure 3 The bottom axonometric structure schematic diagram of the present application is shown; Figure 4 This application shows Figure 1 Schematic diagram of the structure in the split state; Figure 5 The schematic diagram of the isometric structure of the bottom end of the annular floating body of the present application is shown; Figure 6 It shows a schematic diagram of the top axonometric structure of the annular floating body of the present application in a disassembled state; Figure 7 It shows a schematic diagram of the bottom axonometric structure of the annular floating body of the present application in a disassembled state; Figure 8The schematic diagram of the purification component structure of the present application is shown; Fig. 9 It shows a schematic structural diagram of the purification component of the present application in a disassembled state; Reference numerals list 1. Annular float; 101. Built-in shell; 102. Cultivation carrier; 103. Cultivation trough; 104. Root guide opening; 105. Bottom sealing plate; 106. Bait simulation a; 107. Annular interception plate a; 108. Interactive opening a; 109. Connecting ring a; 1010. Microbial carrier a; 2. Purification component; 201. Annular interception plate b; 202. Interactive opening b; 203. Closing plate; 204. Connecting ring b; 205. Bait simulation b; 206. Microbial carrier b; 3. Connecting rope. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example: Please refer to Figures 1 to 9 : The present invention proposes an in-situ purification of river sewage and water resource recycling device based on microbial enhancement, comprising: an annular interception plate b201, the outer peripheral surface of the annular interception plate b201 is provided with a circle of interactive openings b202 connected with its inner peripheral surface in a ring array shape; a closing plate 203 is fixedly installed on the top end surface and the bottom end surface of the annular interception plate b201, the closing plate 203 is coaxially arranged with the annular interception plate b201, and the diameter of the closing plate 203 is consistent with the outer diameter of the annular interception plate b201; the inner peripheral surface of the annular interception plate b201 and the two closing plates 203 together form a purification cavity, and the purification cavity is filled with a plurality of microbial carriers b206, the microbial carriers b206 are activated carbon balls, and microorganisms used for water purification are cultivated therein; on the plane facing outward of the closing plate 203, a plurality of groups of bait simulation parts b205 are fixedly installed in a uniformly distributed manner, and the bait simulation parts b205 are evenly distributed. Component b205 is made of TPR material, and its overall appearance is similar to that of an earthworm; on the plane of the closing plate 203 facing outward, six connecting rings b204 are fixedly installed in a circular array adjacent to the edge; the annular intercepting plate b201, the interactive opening b202, the closing plate 203, the connecting rings b204, the bait simulation component b205 and the microbial carrier b206 together constitute a purification component 2, and the number of purification components 2 is not limited to one group, and its number can be increased; when two adjacent groups of purification components 2 are connected, the two connecting rings b204 in the upper and lower corresponding positions of the two groups of purification components 2 are connected in series through a connecting rope 3; the connecting rope 3 passes through the corresponding connecting ring b204 on the bottom closing plate 203 of the upper purification component 2 and the corresponding connecting ring b204 on the top closing plate 203 of the lower purification component 2 in turn, and the two connecting rings b204 are firmly connected by knotting.

[0024] In the embodiment of the present invention, an annular floating body 1 is also included. An internal shell 101 is provided in the central area of ​​the annular floating body 1. The internal shell 101 is a circular shell structure. The outer circumference of the internal shell 101 is fixedly connected to the inner circumference of the annular floating body 1. An annular interception plate a107 is fixedly installed on the bottom end surface of the internal shell 101. The annular interception plate a107 is coaxially arranged with the internal shell 101, and the diameter of the annular interception plate a107 is smaller than the diameter of the internal shell 101. The outer circumference of the annular interception plate a107 is in an annular array shape and has a circle of interactive openings a107 connected to its inner circumference. 8; A bottom sealing plate 105 is fixedly installed on the bottom end surface of the annular intercepting plate a107, and the bottom sealing plate 105 is coaxially arranged with the annular intercepting plate a107, and the diameter of the bottom sealing plate 105 is consistent with the outer diameter of the annular intercepting plate a107; the inner circumferential surface of the annular intercepting plate a107, the top end surface of the bottom sealing plate 105 and the bottom end surface of the built-in shell 101 together form a purification cavity, and the purification cavity is filled with a plurality of microorganism carriers a1010, which are activated carbon balls, and microorganisms for water purification are cultivated therein; the bottom end surface of the bottom sealing plate 105 Six connecting rings a109 are fixedly installed in an annular array adjacent to the edge; when the annular float 1 is connected to the purification component 2, the connecting rings a109 and b204 in the corresponding upper and lower positions of the annular float 1 and the purification component 2 are connected in series through a connecting rope 3; the connecting rope 3 passes through the connecting ring a109 and the corresponding connecting ring b204 on the top closing plate 203 of the purification component 2 in sequence, and the connecting ring a109 and the connecting ring b204 are firmly connected by knotting; a plurality of groups of baits are fixedly installed on the bottom end surface of the bottom sealing plate 105 in a uniformly distributed manner Simulation part a106, the bait simulation part a106 is made of TPR material, and its overall shape is similar to that of an earthworm; a cultivation trough 103 is provided at the axial center of the top surface of the built-in shell 101, and the cultivation trough 103 is a circular trough structure, and the cultivation trough 103 is filled with a cultivation carrier 102, and the cultivation carrier 102 is made of coconut bran and peat soil; the bottom surface of the cultivation trough 103 is in a circular array shape and has a circle of root guide openings 104 that penetrate the bottom surface of the built-in shell 101, and the inner circle diameter formed by the root guide openings 104 is larger than the outer diameter of the annular intercepting plate a107.

[0025] The working principle of this embodiment: Taking into account the differences in depths of different river waters, the number of purification components 2 of the present invention can be adjusted according to actual conditions, so that in shallower waters, the number of purification components 2 can be reduced, while in deeper waters, the number of purification components 2 can be increased, ensuring that a group of purification components 2 can be placed at different depths of the water area, so that sewage can be fully purified in different water layers, and the adaptability of the device to different water environments is improved. The specific connection operation of the purification component 2 is as follows: When two adjacent purification components 2 are connected, the connecting rope 3 passes through the connecting ring b204 on the bottom closing plate 203 of the upper purification component 2 and the connecting ring b204 on the top closing plate 203 of the lower purification component 2 in sequence, and the two are firmly connected by knotting. Similarly, when the annular floating body 1 is connected to the purification component 2, the connecting rope 3 also passes through the connecting ring a109 and the connecting ring b204 on the top closing plate 203 of the purification component 2 in a similar manner to achieve connection. The present invention is provided with a plurality of purification cavities, which are respectively located in the lower area of ​​the annular float 1 (composed of an annular interception plate a107, a bottom sealing plate 105 and a built-in shell 101) and in the purification component 2 (composed of an annular interception plate b201 and a sealing plate 203); these purification cavities are respectively filled with microbial carriers a1010 and microbial carriers b206, which are both activated carbon balls, and microorganisms for water purification are cultivated inside. When sewage flows into the purification cavity, the huge specific surface area of ​​the activated carbon balls provides abundant attachment sites for the microorganisms, so that the microorganisms can multiply in large quantities and form biofilms, and the pollutants in the sewage, such as organic matter, nitrogen, phosphorus, etc., are decomposed and transformed by the microorganisms through metabolism in the process of contacting with the biofilm, thereby achieving the purification treatment of the sewage; Furthermore, the cultivation trough 103 provided at the axial center of the top surface of the built-in shell 101 of the present invention is filled with a cultivation carrier 102 composed of coconut bran and peat soil, and aquatic plants can be planted. The aquatic plants absorb nutrients such as nitrogen and phosphorus from the water through their roots, further reducing the pollutant content in the water body. At the same time, the root guide opening 104 provided at the bottom surface of the cultivation trough 103 has an inner circle diameter larger than the outer diameter of the annular intercepting plate a107, so that the roots of the aquatic plants can grow downward through the root guide opening 104 and penetrate into the sewage in the purification cavity, and cooperate with the microorganisms to purify the sewage together. The present invention has several groups of bait simulations fixedly installed in a uniformly distributed manner on the planes facing outwards of the closing plate 203 and the bottom closing plate 105, including bait simulations a106 and bait simulations b205. These bait simulations are made of TPR material, and their overall appearance is similar to that of earthworms, which can have a strong attraction to fish. When fish are attracted by the bait simulations and peck at them, a certain external force will be exerted on the device, thereby driving the device to move in the river channel. This position movement enables the device to cover a larger range of waters, avoiding the problem of purification area limitation caused by the fixation of the device, allowing the device to more fully contact the sewage, and further improving the sewage purification effect and range.

[0026] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0027] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0028] The above are only specific implementation methods of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be covered by the protection scope of the present disclosure.

Claims

1. A device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement, characterized in that: include: An annular interception plate b (201), wherein the outer circumference of the annular interception plate b (201) is provided with a circle of interactive openings b (202) in a ring array shape and connected to the inner circumference thereof; a closing plate (203) is fixedly mounted on the top end and the bottom end of the annular interception plate b (201), the closing plate (203) and the annular interception plate b (201) are coaxially arranged, and the diameter of the closing plate (203) is consistent with the outer diameter of the annular interception plate b (201); the inner circumference of the annular interception plate b (201) and the two closing plates (203) together form a purification cavity, wherein a plurality of microbial carriers b (206) are filled in the purification cavity, wherein the microbial carriers b (206) are activated carbon balls, and wherein the microbial carriers b (206) are cultivated with water-soluble microorganisms. Purified microorganisms; on the plane facing outward of the closing plate (203), a plurality of groups of bait simulation pieces b (205) are fixedly installed in a uniformly distributed manner, the bait simulation pieces b (205) being made of TPR material and having an overall appearance similar to that of earthworms; on the plane facing outward of the closing plate (203), six connecting rings b (204) are fixedly installed in a circular array adjacent to the edge portion; the annular intercepting plate b (201), the interactive opening b (202), the closing plate (203), the connecting rings b (204), the bait simulation pieces b (205) and the microorganism carriers b (206) together constitute a purification component (2); the number of purification components (2) is not limited to one group, and the number can be increased.

2. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 1 is characterized in that: When two groups of purification components (2) adjacent to each other are connected, two connecting rings b (204) at corresponding upper and lower positions in the two groups of purification components (2) are connected in series via a connecting rope (3); the connecting rope (3) passes through the corresponding connecting ring b (204) on the bottom closing plate (203) of the upper purification component (2) and the corresponding connecting ring b (204) on the top closing plate (203) of the lower purification component (2) in sequence, and the two connecting rings b (204) are firmly connected by knotting and fixing.

3. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 2 is characterized in that: It also comprises an annular floating body (1), wherein a built-in shell (101) is provided in the central region of the annular floating body (1), the built-in shell (101) is in a circular shell structure, the outer peripheral surface of the built-in shell (101) is fixedly connected to the inner peripheral surface of the annular floating body (1), and an annular interception plate a (107) is fixedly mounted on the bottom end surface of the built-in shell (101), the annular interception plate a (107) is coaxially arranged with the built-in shell (101), and the diameter of the annular interception plate a (107) is smaller than the diameter of the built-in shell (101).

4. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 3 is characterized in that: The outer circumference of the annular interception plate a (107) is provided with a circle of interactive openings a (108) in a ring array shape and connected with its inner circumference; a bottom sealing plate (105) is fixedly installed on the bottom end surface of the annular interception plate a (107), and the bottom sealing plate (105) is coaxially arranged with the annular interception plate a (107), and the diameter of the bottom sealing plate (105) is consistent with the outer diameter of the annular interception plate a (107).

5. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 4 is characterized in that: The inner circumferential surface of the annular intercepting plate a (107), the top end surface of the bottom sealing plate (105), and the bottom end surface of the built-in shell (101) together form a purification cavity, and the purification cavity is filled with a plurality of microbial carriers a (1010), and the microbial carriers a (1010) are activated carbon balls, and microorganisms used for water purification are cultivated therein.

6. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 5 is characterized in that: Six connecting rings a (109) are fixedly installed in an annular array on the bottom end surface of the bottom sealing plate (105) adjacent to the edge portion; when the annular floating body (1) is connected to the purification component (2), the connecting rings a (109) and connecting rings b (204) at corresponding upper and lower positions in the annular floating body (1) and the purification component (2) are connected in series via a connecting rope (3); the connecting rope (3) passes through the connecting rings a (109) and the corresponding connecting rings b (204) on the top sealing plate (203) of the purification component (2) in sequence, and the connecting rings a (109) and the connecting rings b (204) are firmly connected by knotting and fixing.

7. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 6 is characterized in that: A plurality of groups of bait simulation pieces a (106) are fixedly mounted on the bottom end surface of the bottom sealing plate (105) in a uniformly distributed manner. The bait simulation pieces a (106) are made of TPR material, and their overall appearance is similar to that of earthworms.

8. The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to claim 7 is characterized in that: A cultivation trough (103) is provided at the axial center of the top surface of the built-in shell (101); the cultivation trough (103) is in a circular trough structure; the cultivation trough (103) is filled with a cultivation carrier (102); the cultivation carrier (102) is made of coconut husk and peat soil; the bottom surface of the cultivation trough (103) is provided with a circle of root guide openings (104) penetrating the bottom surface of the built-in shell (101) in a circular array shape; the inner circle diameter formed by the root guide openings (104) is larger than the outer diameter of the circular interception plate a (107).

9. A method for in-situ purification of river sewage and recycling of water resources based on microbial enhancement, characterized in that: The device for in-situ purification of river sewage and recycling of water resources based on microbial enhancement according to any one of claims 1 to 8 comprises the following steps: Step 1. Adjust the number of purification components (2): Taking into account the difference in depth of different river waters, the number of purification components (2) is adjusted according to actual conditions; The number of purification components (2) is reduced in shallower waters, and the number of purification components (2) is increased in deeper waters, so as to ensure that a set of purification components (2) can be placed at different depths of the waters, so as to achieve sufficient purification of sewage in different water layers and improve adaptability to different water environments; Step 2. Clean the connection of the component (2): When two adjacent purification components (2) are connected, the connecting rope (3) is passed through the connecting ring b (204) on the bottom closing plate (203) of the upper purification component (2) and the connecting ring b (204) on the top closing plate (203) of the lower purification component (2) in sequence, and the two are firmly connected by knotting and fixing. When the annular floating body (1) is connected to the purification assembly (2), the connection rope (3) is passed through the connection ring a (109) and the connection ring b (204) on the top closing plate (203) of the purification assembly (2) in a similar manner to achieve connection; Step 3. Wastewater purification: The purification cavity is filled with microbial carrier a (1010) and microbial carrier b (206), both of which are activated carbon balls and have microorganisms for water purification cultivated inside. When sewage flows into the purification cavity, the huge specific surface area of ​​the activated carbon balls provides abundant attachment sites for the microorganisms, and the microorganisms multiply in large numbers to form a biofilm. During the contact process between the sewage and the biofilm, the pollutants in the sewage are decomposed and transformed by the microorganisms through metabolism, thereby achieving sewage purification. Step 4. Aquatic plant coordinated purification: A cultivation carrier (102) composed of coconut husk and peat soil is filled in a cultivation trough (103) opened at the axial center of the top surface of the built-in shell (101) to plant aquatic plants. The aquatic plants absorb nutrients such as nitrogen and phosphorus from the water through their roots, thereby further reducing the content of pollutants in the water body. The root guide opening (104) opened at the bottom surface of the cultivation trough (103) enables the roots of the aquatic plants to pass through the root guide opening (104) and grow downwards, penetrate into the sewage in the purification cavity, and synergize with the microorganisms to purify the sewage. Step 5. Improve purification effect and range: On the outwardly facing planes of the closing plate (203) and the bottom closing plate (105), a bait simulation component b (205) and a bait simulation component a (106) are respectively fixedly mounted. The bait simulation components are made of TPR material and have an overall appearance similar to that of an earthworm. The strong attraction they have on fish is utilized. When fish are attracted and peck at the bait, an external force is exerted on the device, driving the device to move in the river channel, so that the device covers a larger area of ​​water, avoiding the problem of limited purification area caused by the fixing of the device, and making it more fully contact with sewage, thereby further improving the sewage purification effect and range.

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