Overall integrated floating type water ecosystem and construction method thereof

Abstract

The invention relates to an overall integrated floating type water ecological system and a construction method, and belongs to the technical field of water ecological restoration. The system comprises a hollow fiber yarn three-dimensional net-shaped floating body (polysulfone fiber with the porosity of 80%-90%), and a hydrophilic coating is grafted on the surface of the hollow fiber yarn three-dimensional net-shaped floating body through gamma rays; the plasma modified PP fiber microbial carrier (the specific surface area is greater than or equal to 800m < 2 > / m < 3 >) is loaded with nitrifying bacteria, denitrifying bacteria and phosphorus-accumulating bacteria in an optimized ratio; the axial flow surface aerator and the guide cylinder are driven by solar energy to form annular water flow with the flow speed of 0.2-0.3 m / s in the cylinder. Through the floating body-carrier-oxygenation integrated design, the bionic hidden structure and the heat preservation layer are combined, the problems of insufficient water body exchange, carrier blockage, high energy consumption, poor stress resistance and the like in the prior art are solved, and the pollutant removal efficiency and the ecological stability are remarkably improved. The method is suitable for ecological restoration of eutrophic water bodies, landscape lakes and reservoirs.

Description

Technical Field

[0001] This application belongs to the field of water ecological restoration technology, and in particular relates to an integrated floating water ecosystem and its construction method. Background Technology

[0002] Existing floating ecological restoration technologies are mainly divided into three generations, but all of them have systemic defects.

[0003] First generation: Floating islands made of natural materials. These are made by binding bamboo or wood together to form floating beds. Although they are low in cost, they are prone to decay (lifespan < 1 year), release organic matter that causes secondary pollution of water bodies, and cannot support complex ecosystems.

[0004] Second generation: Plastic frame floating island. Improved solutions, such as Chinese patent CN218789822U, use PVC floating pipe frame + planting basket structure, which extends the life to 3-5 years, but has a core defect.

[0005] Structural enclosure: The floating pipe is a fully enclosed hollow structure, which blocks vertical water exchange, resulting in dissolved oxygen stratification (surface DO > 6 mg / L, bottom DO < 2 mg / L); Plant root constraint: The planting basket has a limited volume (diameter usually < 20 cm), which prevents the roots of large emergent plants from expanding and limits biomass accumulation; Lack of microbial carrier: No dedicated microbial attachment area is set up, relying on natural enrichment, and the ammonia nitrogen removal rate is < 15%.

[0006] The third generation: Composite artificial wetland floating islands, Chinese patents CN113233607A and CN202421559042.4 attempt to integrate the functions of plants and microorganisms, but the design still has fundamental limitations. The float-carrier separation design in Chinese patent CN202421559042.4, using a "float + independent biological filler layer," results in a short circuit between the float and the carrier, reducing the effective contact area by more than 40%. The inorganic carrier clogging problem in Chinese patent CN113233607A, which uses gravel / ceramic balls as microorganisms... The carrier exhibits a pore blockage rate exceeding 60% after 3 months of operation, resulting in a denitrification efficiency that drops to 30% of its initial value. It is also highly energy-dependent: Chinese patent CN114651741A requires an external power grid to drive the aeration equipment, with energy consumption per unit area exceeding 50W / ㎡, making large-scale application difficult. Existing spawning mimicry structures generally ignore fish pore size preferences and chemical induction mechanisms, leading to an actual success rate of less than 50% (e.g., Chinese patent CN202421559042.4). Furthermore, winter plant insulation relies on thickened floating bodies, increasing weight and reducing water exchange efficiency. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an integrated floating aquatic ecosystem and its construction method, aiming to solve at least one of the above-mentioned technical problems.

[0008] The technical solution adopted by this invention to solve its technical problem is:

[0009] An integrated floating aquatic ecosystem, comprising:

[0010] Hollow fiber three-dimensional mesh float: formed by random interweaving of polysulfone hollow fiber filaments, with a porosity of 80%-90% and a density ≤0.8g / cm³. 3 Tensile strength ≥15MPa, PVP and hydrophilic polymer are grafted onto the surface of the fiber using gamma wire bridging technology;

[0011] Hydrophilic microbial carrier: woven from plasma-modified PP fibers into spherical baskets or fiber ropes, with a single filament diameter of 0.05 mm and a specific surface area ≥ 800 m². 2 / m 3 The surface is loaded with nitrifying bacteria, denitrifying bacteria, and polyphosphate-accumulating bacteria;

[0012] Aeration and circulation system: including a solar-powered axial flow surface aerator and guide tube, forming a water circulation flux of 10,000-15,000 m³ / h. 3 A circular water flow with a velocity of 0.2-0.3 m / s per hour.

[0013] Preferably, in the integrated floating aquatic ecosystem of the present invention, the fiber diameter of the three-dimensional mesh float is 0.1-0.3mm, the thickness of the float is 300-1500mm, and the top is provided with a bidirectional high-strength plastic geogrid.

[0014] Preferably, in the integrated floating aquatic ecosystem of the present invention, the modification method of the hydrophilic microbial carrier includes: bombarding the surface of PP fibers with Ar / O2 plasma at a power of 200-500W for 3-10 minutes to introduce hydroxyl and carboxyl polar groups, so that the density of polar groups on the fiber surface is ≥15 groups / μm. 2 .

[0015] Preferably, in an integrated floating aquatic ecosystem of the present invention, the three-dimensional mesh float has a foamed polyurethane insulation layer embedded inside to maintain the temperature of plant roots ≥5℃.

[0016] Preferably, the present invention provides an integrated floating aquatic ecosystem, wherein the edge of the floating body is provided with a biomimetic aquatic plant concealment structure, comprising:

[0017] Spawning area for small fish: Three-dimensional structure tube with an embedded diameter of 50mm-100mm;

[0018] Large fish spawning area: Three-dimensional structure tube with an embedded diameter of 150mm-300mm;

[0019] The ratio of the spawning areas for small fish to those for large fish is set according to the distribution of fish species in the target waters.

[0020] Preferably, in an integrated floating aquatic ecosystem of the present invention, the layered biomimetic aquatic plant structure includes a spawning area for small fish (50-100 mm in diameter) and a spawning area for large fish (150-300 mm in diameter), with the inner wall of the tube coated with a slow-release layer of 17α,20β-dihydroxyprogesterone pheromone, thereby increasing the spawning rate of the target fish species to 82%-95%.

[0021] Preferably, in the integrated floating aquatic ecosystem of the present invention, the axial flow surface aerator has a power of 800W, and the guide tube vertically penetrates the float to realize the exchange between the bottom water and the surface water.

[0022] Preferably, the present invention provides an integrated floating aquatic ecosystem in which emergent and floating-leaved plants, including reeds, calamus, water celery and water spinach, are planted on the floating body to form a stratified purification system.

[0023] A method for constructing an integrated floating aquatic ecosystem includes the following steps:

[0024] S1: Polysulfone hollow fiber filaments are surface modified by gamma wire bridging technology and then woven into a three-dimensional mesh float with a porosity of 80%-90%.

[0025] S2: Ar / O2 plasma is used to bombard PP fibers at a power of 300W±50W for 5min±2min, and the fibers are woven into microbial carriers with a diameter of 8-15cm. The inoculation ratio of bacteria is nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria = 1:1.5-2:1.

[0026] S3: Suspend microbial carriers at the bottom of the floating body, plant emergent / floating-leaved plants on the top, and set up a biomimetic concealment structure at the edge;

[0027] S4: Install a solar-powered axial flow surface aerator and a guide tube at the center of the floating body to form a circular water flow path.

[0028] Preferably, in the method for constructing the integrated floating aquatic ecosystem of the present invention, in step S2, PP fibers are placed in a plasma reaction chamber, and an Ar / O2 mixed gas is introduced. The mixture is treated for 5 min ± 30 s under conditions of 300 W ± 10% power and 30 Pa pressure, resulting in a surface hydroxyl density ≥ 15 hydroxyl groups / μm. 2 The modified fibers were woven into spherical hanging baskets with a diameter of 10cm±2cm and inoculated with bacterial solution.

[0029] The beneficial effects of this invention are:

[0030] (1) High-efficiency purification capability: Through plasma-modified microbial carriers (specific surface area ≥800m²),2 / m 3 ) and the optimized ratio of microbial communities (nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria)

[0031] =1:1.5-2:1), significantly improving biofilm loading density and stability (shedding rate <8%), three-dimensional mesh floating body (porosity 80%-90%) combined with annular water flow (flow velocity 0.2-0.3m / s), eliminates dissolved oxygen stratification in water, increasing bottom DO from 1.5mg / L to 4.9mg / L;

[0032] (2) Integrated design: The floating body, microbial carrier and oxygenation system are highly integrated to avoid short-circuiting of water flow and reduce energy consumption;

[0033] (3) Strong resistance: The foamed polyurethane insulation layer (thickness ≥50mm) maintains the root temperature of plants ≥5℃ in winter, and the survival rate of cold-resistant plants is 96%; the optimized thickness of the floating body (300-1500mm) can withstand level 6 winds and waves (wave height 0.8m);

[0034] (4) Ecological synergy and sustainability: The layered biomimetic aquatic plant structure (small area pipe diameter 50-100mm, large area 150-300mm) combined with the pheromone slow release layer can specifically improve the spawning rate of the target fish species to 72%-95%.

[0035] (5) The solar-powered aeration system (800W axial flow surface aerator) achieves zero external energy consumption, with a water circulation flux of 12,000-15,000 m³ / h. 3 / h.

[0036] (6) Wide applicability: The modular expansion (30m×10m combined system) is suitable for different water areas (landscape lakes, reservoirs, etc.), and reduces chlorophyll a from 120μg / L to 4μg / L within 30 days;

[0037] (7) The plasma modification process increases the initial attachment rate of microorganisms by 237% and shortens the system start-up cycle. Attached Figure Description

[0038] The technical solution of this application will be further described below with reference to the accompanying drawings and embodiments.

[0039] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the system according to a specific embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the layered cross-sectional structure of the floating body according to a specific embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the internal structure of the guide tube according to a specific embodiment of this application;

[0042] Figure 4This is a schematic diagram of the plasma modification process according to a specific embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the water flow field simulation structure according to a specific embodiment of this application;

[0044] Figure 6 This is a schematic diagram of the oxygenation circulation system according to a specific embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the construction method of the system in the specific implementation of this application. Detailed Implementation

[0046] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0047] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0049] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0050] Example 1: Single System Basic Construction

[0051] Floating body construction: Refer to Figure 7 It uses 0.2mm diameter polysulfone hollow fiber filaments, and grafts PVP coating through gamma wire bridging technology;

[0052] The material is woven into a 5m×5m mesh float (800mm thick, 85% porosity), and the top is welded with a bidirectional high-strength plastic geogrid (3mm thick).

[0053] An internal polyurethane foam layer (50mm thick) is embedded to ensure that the root temperature is ≥8℃ in winter;

[0054] The edge is designed with a biomimetic aquatic plant structure, including a small spawning area (80mm in diameter) and a large spawning area (200mm in diameter), with an area ratio of 7:3; the tube wall is coated with a pheromone slow-release layer (such as 17α,20β-dihydroxyprogesterone).

[0055] Microbial carrier loading: PP fiber filaments were modified by Ar / O2 plasma bombardment and woven into spherical baskets with a diameter of 10cm;

[0056] Inoculate with native microbial flora (nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria = 1:1.5:1) and suspend it 0.5m below the float.

[0057] Oxygenation system configuration: Refer to Figure 6 An 800W solar-powered axial flow surface aerator is installed, with the guide tube penetrating the center of the float.

[0058] A circular water flow with a velocity of 0.25 m / s was formed, and the measured water exchange volume was 12000 m³. 3 / h.

[0059] Experimental results: The floating body withstood a Force 5 wind and wave (wave height 0.4m) without deformation; the COD removal rate of the water was 65%, and the ammonia nitrogen removal rate was 58%; the plant survival rate in winter was 96%.

[0060] Reference Figure 1 The system's overall structure diagram shows that the green curved surface represents the supporting plant layer, the light blue curved surface represents the hollow fiber three-dimensional mesh float, the purple sphere represents the microbial carrier, the green vertical line represents the biomimetic aquatic plant clump, the brown vertical line represents the ceramic porous tube, the red vertical line represents the flow guide tube, and the yellow sphere represents the solar-powered axial flow surface aerator; (Refer to...) Figure 2 A cross-sectional view of the layered structure of the floating body, in which the light blue rectangle represents the three-dimensional mesh floating body structure, the random lines represent hollow fiber filaments, and a rectangle (beige) located inside the floating body is the insulation layer.

[0061] Example 2: Construction of Combined Systems

[0062] Modular expansion: Six floating bodies from Example 1 are spliced ​​together to form a 300㎡ floating island (30m×10m); the thickness of the floating body is increased to 1000mm (with enhanced wind and wave resistance design), and the joints are fixed with waterproof fasteners.

[0063] Layered purification design: Plant configuration: emergent plants (reeds, calamus) and floating-leaved plants (water lilies) are rotated, with a coverage rate of 90%;

[0064] Microbial carrier: Four modified PP fiber ropes (1.2m in length, 850m² specific surface area) are suspended per square meter of floating body. 2 / m 3 ).

[0065] Aeration system optimization: 1 aerator should be configured for every 200㎡, referring to... Figure 3 Adding baffles to the flow guide tube improves the water exchange efficiency at the bottom layer.

[0066] Application scenario: Treatment of blue-green algae pollution in a scenic lake (1.2 hectares) in an eastern province of China;

[0067] After 30 days of operation, chlorophyll a decreased from 120 μg / L to 4 μg / L, while dissolved oxygen stabilized at 5 mg / L.

[0068] Example 3: Stress Resistance Enhancement System

[0069] Adaptable to extreme environments: The thickness of the float is increased to 1500mm, and the internal polyurethane foam layer is thickened to 100mm; the plant selection includes cold-resistant reeds (survival temperature -10℃) and drought-resistant loosestrife.

[0070] Upgraded biomimetic structure: The biomimetic aquatic plant cluster is embedded with porous ceramic tubes, providing a habitat for fish to spawn and for benthic organisms to live in.

[0071] Among them, in the spawning area for small fish (80mm diameter): the spawning success rate of crucian carp / carp was 92% (the pheromone slow-release layer improved the efficiency by 15%).

[0072] Large fish spawning area (tube diameter 200mm): Grass carp / silver carp spawning success rate 88% (pheromone slow release layer increases efficiency by 12%);

[0073] Composite zone (small:large = 7:3): Overall egg production rate of 90% (the pheromone slow-release layer increases efficiency by 18%).

[0074] Structural layout: 3-5 ceramic tubes are installed on the edge of each square meter of float, vertically inserted into the water at a depth of 0.8-1.2m.

[0075] Results: In a reservoir in Northeast China (winter temperature -15℃), the temperature of plant roots was maintained at 6℃; the ammonia nitrogen removal rate in the water remained at 52%, and there was no ice layer damage.

[0076] Example 4: Verification of Floating Body Thickness Boundary

[0077] Test objective: To verify the wind and wave resistance and thermal insulation performance of the minimum (300mm) and maximum (1500mm) thickness of the floating body.

[0078] Implementation method: Thin floating body assembly (thickness 300mm): polysulfone fiber diameter 0.3mm (upper limit), porosity 80% (lower limit); without insulation layer and with 25mm insulation layer, installed in a tributary of the Yangtze River (average annual wind speed 4.5m / s, wave height 0.3m).

[0079] Thick-type floating body assembly (thickness 1500mm): fiber diameter 0.1mm (lower limit), porosity 90% (upper limit); each has a built-in 25-100mm foamed polyurethane layer for insulation, installed in Bohai Bay (winter wind speed 8m / s, wave height 0.8m, ambient temperature -10℃).

[0080] Table 1: Verification Table of Floating Body Thickness and Thermal Insulation Layer Effect

[0081]

[0082]

[0083] Referring to the values ​​in Table 1, we can conclude that: a thickness of 300mm is the critical value for resisting level 5 winds and waves (requires reinforcement), and 1500mm can be extended to level 6 wind and wave scenarios; in the cold environment of the north, a 50mm insulation layer is the critical thickness for maintaining ≥5℃, and 100mm is suitable for insulation layers in extreme environments, which is a necessary condition for the root system to maintain ≥5℃ in winter.

[0084] Example 5: Validation of the specific surface area of ​​microbial carriers

[0085] Test objective: To verify a specific surface area ≥ 800 m² 2 / m 3 Impact on microbial load efficiency: Implementation methods:

[0086] Control group (specific surface area 750m²) 2 / m 3 ):

[0087] The PP fiber monofilament diameter is 0.06mm, and it is not plasma modified;

[0088] Inoculate with equal amounts of bacterial strains (nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria = 1:1:1).

[0089] Experimental group (specific surface area 850 m²) 2 / m 3 ): PP fiber monofilament diameter 0.05mm, Ar / O2 plasma modified; strain ratio optimized to 1:1.5:1.

[0090] Table 2: Comparison of effects of different strain ratios (running for 60 days).

[0091]

[0092] Table 3: Comparison of the effects of different strain ratios (running for 60 days).

[0093] Group <![CDATA[Biofilm density (mg / cm 3 )]]> Pore ​​blockage rate control group 12.3 35％ experimental group 28.7(↑133％) 8％(↓77％)

[0094] Referring to Tables 2 and 3, the conclusions are as follows: the removal rate is >55% in the range of 1:1.5-2:1, but the biofilm stability is optimal at 1:1.5:1; specific surface area ≥800m² 2 / m 3 Combined with plasma modification, the biofilm loading capacity was increased by more than 3 times. (Reference) Figure 4 A schematic diagram of a plasma modification device, in which random purple lines represent the effect of plasma glow discharge.

[0095] Example 6: Water Flow Velocity Boundary Verification

[0096] Test objective: To verify the effect of flow velocities of 0.2 m / s (lower limit) and 0.3 m / s (upper limit) on water exchange efficiency.

[0097] Implementation method:

[0098] Low-speed group (0.18m / s): Axial flow surface aerator power 600W (lower than the claimed power), the guide tube is not equipped with baffles; applied to urban landscape pools (water depth 2.5m).

[0099] High-speed group (0.32m / s): Surface aerator power 1000W (exceeding the claim), guide tube equipped with titanium alloy baffles; applied to reservoirs (water depth 6m).

[0100] Table 4: Different water flow velocities

[0101] Group Bottom DO Improvement Water circulation flux Energy consumption per unit area Low speed group 1.2 mg / L → 2.8 mg / L <![CDATA[8500m 3 / h]]> 38W / ㎡ High-speed group 1.0 mg / L → 5.1 mg / L <![CDATA[17000m 3 / h]]> 85W / ㎡

[0102] The bottom layer DO concentration increased from 1.5 mg / L to 4.9 mg / L, with a flux of 12500 m³ / L. 3 / h, energy consumption 45W / ㎡.

[0103] Conclusion: When the flow rate is <0.2 m / s, the bottom layer DO cannot be stably ≥4 mg / L; >0.3 m / s results in a sharp increase in energy consumption, and 0.2-0.3 m / s is the optimal efficiency range. (Reference) Figure 5 The diagram shows a simulation of the annular water flow field, where the green ring represents the outer edge of the circular float.

[0104] Example 7: Verification of hydrophilic modification process

[0105] Test objective: To verify the key role of plasma modification in hydrophilicity.

[0106] Implementation method:

[0107] Unmodified group: PP fiber filaments are directly woven into hanging baskets (15cm in diameter), with the introduction of non-polar groups; naturally enriched microorganisms.

[0108] Modified group: Ar / O2 plasma bombardment (power 300W, time 5min), -OH / -COOH group density ≥15 / μm 2 Inoculate with the same bacterial strains under the same conditions.

[0109] Table 5: Comparison of the effects of plasma modification on hydrophilicity (30-day biofilm formation period):

[0110]

[0111] Conclusion: Plasma modification reduced interfacial tension by 62%, and the modification process is a necessary means to improve purification efficiency.

[0112] Example 8: System Integration Performance Verification

[0113] Objective: To demonstrate the synergistic effect of the integrated "floating body-carrier-oxygenation" system.

[0114] Comparison Groups: Group A: Separate design (distance between float and carrier > 1m); Group B: Integrated design.

[0115] Table 6: Comparison of System Integration Efficiency

[0116] Group COD removal rate ammonia nitrogen removal rate Energy consumption (W / ㎡) Group A 48％ 36％ 58 Group B 65％ 58％ 45

[0117] Referring to Table 6, we can conclude that the integrated design reduces short-circuit losses in water flow, and the carrier and plant roots form a symbiotic microenvironment.

[0118] Based on the above-described preferred embodiments according to this application, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An integrated floating aquatic ecosystem, characterized in that, include: Hollow fiber three-dimensional mesh float: formed by random interweaving of polysulfone hollow fiber filaments, with a porosity of 80%-90% and a density ≤0.8g / cm³. 3 Tensile strength ≥15MPa, PVP and hydrophilic polymer are grafted onto the surface of the fiber using gamma wire bridging technology; Polyurethane insulation layer: embedded in the surface of the hollow fiber three-dimensional mesh float, with a thickness of 25mm to 50mm, used to reduce the surface heat transfer coefficient; Hydrophilic microbial carrier: woven from plasma-modified PP fibers into spherical baskets or fiber ropes, with a single filament diameter of 0.05 mm and a specific surface area ≥ 800 m². 2 / m 3 The surface is loaded with nitrifying bacteria, denitrifying bacteria, and polyphosphate-accumulating bacteria; Aeration and circulation system: including a solar-powered axial flow surface aerator and guide tube, forming a water circulation flux of 10,000-15,000 m³ / h. 3 The annular water flow rate is 0.2-0.3 m / s inside the guide tube.

2. The integrated floating aquatic ecosystem according to claim 1, characterized in that, The three-dimensional mesh float has a fiber diameter of 0.1-0.3mm and a float thickness of 300-1500mm, and is topped with a bidirectional high-strength plastic geogrid.

3. The integrated floating aquatic ecosystem according to claim 2, characterized in that, The modification method of the hydrophilic microbial carrier includes: bombarding the surface of PP fibers with Ar / O2 plasma at a power of 200-500W for 3-10 minutes to introduce hydroxyl and carboxyl polar groups, so that the density of polar groups on the fiber surface is ≥15 groups / μm. 2 .

4. The integrated floating aquatic ecosystem according to claim 1, characterized in that, The edge of the float is provided with a biomimetic aquatic plant concealment structure, including: Spawning area for small fish: Three-dimensional structure tube with an embedded diameter of 50mm-100mm; Large fish spawning area: Three-dimensional structure tube with an embedded diameter of 150mm-300mm; The ratio of the area of ​​the spawning area for small fish to that for large fish is set according to the distribution of fish species in the target waters.

5. The integrated floating aquatic ecosystem according to claim 4, characterized in that, The inner wall of the three-dimensional structure tube is coated with a fish pheromone slow-release layer, which includes at least one of 17α,20β-dihydroxyprogesterone.

6. The integrated floating aquatic ecosystem according to claim 1, characterized in that, The axial flow surface aerator has a power of 800W, and the guide tube vertically penetrates the float to realize the exchange of bottom water and surface water.

7. The integrated floating aquatic ecosystem according to claim 1, characterized in that, The floating bodies are planted with emergent and floating-leaved plants, including reeds, calamus, water celery, and water spinach, forming a stratified purification system.

8. A method for constructing an integrated floating aquatic ecosystem as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Polysulfone hollow fiber filaments are surface modified by gamma wire bridging technology and then woven into a three-dimensional mesh float with a porosity of 80%-90%. S2: Ar / O2 plasma is used to bombard PP fibers at a power of 300W±50W for 5min±2min, and the fibers are woven into microbial carriers with a diameter of 8-15cm. The inoculation ratio of bacteria is nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria = 1:1.5-2:

1. S3: Suspend microbial carriers at the bottom of the floating body, plant emergent / floating-leaved plants on the top, and set up a biomimetic concealment structure at the edge; S4: Install a solar-powered axial flow surface aerator and a guide tube at the center of the floating body to form a circular water flow path.

9. The method for constructing an integrated floating aquatic ecosystem according to claim 8, characterized in that, In S2, PP fibers are placed in a plasma reaction chamber and a 4:1 volume ratio Ar / O2 mixed gas is introduced. The mixture is treated for 5 min ± 30 s at a power of 300 W ± 10% and a pressure of 30 Pa to achieve a surface hydroxyl density ≥ 15 hydroxyl groups / μm. 2 The modified fibers were woven into spherical hanging baskets with a diameter of 10cm±2cm, and inoculated with bacterial solution. The ratio of the bacterial solution was nitrifying bacteria: denitrifying bacteria: polyphosphate-accumulating bacteria = 1:1.5:1.

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