Environmentally friendly root barrier system with biological purification function

Abstract

The present invention discloses an environmentally friendly root isolation system with biological purification function. The system starts from the planting line of emergent plants, takes the side toward the center of the water body as the width side, and takes the elevation of the bottom of the water body as the reference. The isolation trough unit is expanded downward, and the filler unit is filled in the isolation trough unit, so that the space below the top of the isolation trough forms an aerobic zone, an anoxic zone, and an anaerobic zone in sequence. The present invention separates plants through isolation trough units to prevent plant species with strong ecological invasive power from encroaching on other plants through their roots.

Description

Technical Field

[0001] The present invention relates to the technical field of ecological restoration engineering, and more specifically, to an environmentally friendly root isolation system with biological purification function. Background Art

[0002] Aquatic plants are an important part of river and lake ecosystems and have significant ecological functions. They transfer the pollution load in the water system through plant growth. Their developed root systems provide a place for microorganisms to grow and reproduce, decompose pollutants in the water for plant absorption, and have certain absorption and purification, water clarification, and algae inhibition functions. Therefore, aquatic plant restoration and planting technology is an important means of repairing and managing water pollution treatment, water quality restoration, water ecological restoration and construction in urban rivers, lakes, ponds and other water environments. Aquatic plants are widely used in comprehensive watershed management projects, sponge city construction projects, and river and lake ecological restoration projects, but various thorny problems have also arisen in their application process.

[0003] During the project design phase, designers will design aquatic plant planting plans based on the unique landscape visual effects and ecological functions such as water purification of various groups of aquatic plants, while applying design principles such as landscape design and aesthetics. However, in practice, most commonly used aquatic plants such as reeds, cattails, taro, and lily of the valley have strong reproductive capacity and ecological invasiveness. Often, 1-3 years after the completion of the project, adjacent aquatic plants will erode other plants. That is, adjacent plants will not show mutual influence at the beginning of the project, but as time goes by, the invasive plants in the area will completely replace the growth space of an adjacent plant or the entire area of ​​plants. This will reduce the biodiversity of aquatic plants, which will have a great impact on the landscape effect and ecological purification function of the original design plan. In addition, for projects that do not have measures to restrict the growth space of emergent plants, when the growth environment is suitable, highly invasive plants will take up most of the space of rivers and lakes after 1-2 growing and breeding seasons, bringing negative impacts to water bodies with flood-carrying functions. At the same time, for project operation and maintenance units, a large amount of additional manpower, financial resources and material resources will be required to carry out labor-intensive and inefficient harvesting, transportation and disposal of disorderly growing plants during the project operation and maintenance stage.

[0004] At present, the main technical measures in the industry to limit the disorderly growth of emergent plants are to use PVC boards or PVC plastic sheets to isolate the roots of plants and to use pine stakes or fir stakes to isolate plants. The practice of using PVC boards or PVC plastic sheets to isolate the roots of plants is undoubtedly to move artificially synthesized non-degradable chemical product pollutants into the environment, which is not conducive to environmental protection. At the same time, it forcibly blocks and destroys the energy flow and material circulation of the natural ecosystem on both sides of the root isolation measures, hinders various biological activities, and is not conducive to the natural succession and self-repair of the ecosystem. Regarding the use of pine stakes or fir stakes to isolate plants, in terms of implementation effect, after investigating the actual implementation, it has a certain restraining effect on the growth of short-rooted plants, but has little effect on long-rooted plants such as reeds. In terms of landscape effect, if the construction quality of the wood piles is not in place, the display effect of the wood piles in terms of height, diameter, and linear shape will have a negative impact on the landscape effect. In terms of cost, the unit cost of pine stakes and fir stakes is about 2,000-3,000 yuan / m 3 The cost is high. In terms of operation and maintenance, the establishment of wooden piles in the river channel will hinder the implementation of dredging projects in the future, and it is also not conducive to the protection of state-owned assets. In terms of resource utilization, the use of a large number of wooden piles will cause excessive use of forest resources and is not conducive to environmental protection. Therefore, it is extremely necessary to find a low-cost, ecological, and environmentally friendly aquatic plant root isolation technology. Summary of the invention

[0005] The purpose of the present invention is to propose an environmentally friendly root isolation system technology with biological purification function to address the problem that emergent plants, which are commonly used in comprehensive watershed management projects, sponge city construction projects and river and lake ecological restoration projects, have good landscape effects and strong water purification capabilities, but have strong reproductive capacity and ecological invasiveness. They often occupy the growth space of adjacent or regional aquatic plants within 1-3 years after the completion of the project.

[0006] In order to achieve these purposes and other advantages according to the present invention, an environmentally friendly root isolation system with biological purification function is provided, which is characterized in that the isolation trough unit is expanded downward along the planting sample line of emergent plants as the starting edge, the side toward the center of the water body as the width edge, and the bottom elevation of the water body as the reference, and the filling unit is filled in the isolation trough unit, so that the space below the top of the isolation trough forms an aerobic zone, a facultative anoxic zone and an anaerobic zone in turn, so that different emergent plants are separated by the isolation trough units, preventing plant species with strong ecological invasive ability from encroaching on other plants through their roots.

[0007] Preferably, when the emergent plants are shallow root type, the width of the isolation trough unit is set to at least 20 cm, the depth is set to at least 30 cm, and the length is set according to the partition length of different emergent plants;

[0008] The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary as a packing boundary, a surface packing layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer.

[0009] Preferably, the bottom filler layer is formed by laying crushed stone and / or gravel with a particle size of 2-4 cm and a porosity of 35-45% with a thickness of 5-20 cm;

[0010] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid. The non-woven fabric specification that can be used for the non-woven fabric layer at the filler boundary is 200g / m 2 It should be noted that the non-woven fabric specifications mentioned in this application are not limited to 200g / m 2 , it is only necessary to ensure that the fillers on both sides of the non-woven fabric can be separated, while not affecting the movement of water and microorganisms on both sides of the non-woven fabric.

[0011] The surface isolation non-woven fabric layer is formed by laying a certain thickness of the surface filler layer to form an aerobic zone, the surface isolation non-woven fabric layer is covered with the top surface of the surface filler layer, and finally a certain thickness of the surface filler layer is laid to form an aerobic zone; the surface filler layer is formed by laying crushed stone and / or gravel with a particle size of 0.5-2cm and a porosity of 30-35%.

[0012] Preferably, when the emergent plants are deep-rooted, the width of the isolation trough unit is set to at least 40 cm, the depth is set to at least 80 cm, and the length is set according to the partition length of different emergent plants;

[0013] The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary as a packing boundary, a surface packing layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer.

[0014] Preferably, the bottom filler layer is paved with crushed stone and / or gravel with a particle size of 2-4 cm and a porosity of 35-45%;

[0015] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid;

[0016] The surface isolation non-woven fabric layer is laid after the surface filler is laid, and then the surface isolation non-woven fabric layer covers the top surface of the surface filler layer, and finally a surface filler layer of a certain thickness is laid; the surface filler layer is made of crushed stone and / or gravel with a particle size of 0.5-2cm and a porosity of 30-35%.

[0017] Preferably, the bottom filler layer is made of volcanic rock or other material fillers with a particle size of 2-4 cm and a porosity of 35-45%;

[0018] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid;

[0019] The surface isolation non-woven fabric layer is formed by laying a certain thickness of surface filler, then covering the top surface of the surface filler layer with the surface isolation non-woven fabric layer, and finally laying a certain thickness of surface filler layer; the surface filler layer is formed by laying limestone or other material fillers with a particle size of 0.5-2cm and a porosity of 30-35%;

[0020] The other material fillers are fillers containing limestone, volcanic rock and / or embedded bacterial agents.

[0021] Preferably, when the emergent plants are deep-rooted, the width of the isolation trough unit is set to at least 40 cm, the depth is set to at least 80 cm, and the length is set according to the partition length of different emergent plants; the filler unit includes from bottom to top: a bottom filler layer, a non-woven fabric layer at the filler boundary, a middle filler layer, an isolation non-woven fabric layer at the surface, and a surface filler layer.

[0022] Preferably, the bottom filler layer is made of volcanic rock or other material fillers with a particle size of 4-15 cm and a porosity of 45-55%;

[0023] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid;

[0024] The middle filler layer is composed of other material fillers with a particle size of 2-4 cm, and is laid on the non-woven fabric layer at the filler boundary with a porosity of 35-45%;

[0025] After laying the middle filler layer, lay the surface isolation non-woven fabric layer; lay the surface filler layer on the surface isolation non-woven fabric layer, the surface filler layer is made of crushed stone, gravel and / or other material fillers with a particle size of 0.5-2cm, and is laid with a thickness of 20cm according to a porosity of 30-35%;

[0026] The other material fillers are fillers containing limestone, volcanic rock and / or embedded bacterial agents.

[0027] The present invention has at least the following beneficial effects:

[0028] (1) The present invention first digs a trench with a width of at least 20 cm and a depth of at least 30 cm along the planting partition sample line after the plant design plan is laid out, and the trench is excavated to the side of the center of the water body. The length is adjusted according to the length of each plant partition designed in the plan. The specific size is adjusted according to the plant species. Then, pebbles, gravel or limestone and other material fillers are added in the trench to form a new plant root isolation system technology and an underground wetland purification system technology in the water body. It can not only effectively solve the problem of disorderly plant growth, but also improve the ability of plants to impact high-velocity water bodies, improve survival rates, and reduce construction costs. At the same time, it will provide different oxygen-containing habitats and attachment spaces for various background microorganisms, and form an underground wetland system together with aquatic plants, laying a foundation for strengthening the water purification capacity of the water body's own ecosystem and improving the biodiversity of the water body ecosystem, and fundamentally strengthening the water purification function of the water body ecosystem itself.

[0029] (2) The present invention uses river pebbles, crushed stones or other functional material fillers such as limestone. The crushed stones not only have a huge cost advantage over wooden piles, but also have the advantages of being locally available and having a long service life. In addition, it will not have a negative impact on the implementation of water dredging projects in the future. It can be directly dug out, flushed, recycled and reused, which will not only avoid wasting natural resources, but also avoid causing losses to national property.

[0030] (3) The present invention can flexibly adjust the trench excavation volume and filler material and usage according to the growth characteristics and invasive characteristics of different plant species. It has strong pertinence to different types of plants and can greatly reduce the large amount of extra work and costs incurred in harvesting, transporting and handling randomly growing plants during the project operation and maintenance period. At the same time, it can provide maximum help in maintaining the landscape visual effect and ecological purification function of the design scheme.

[0031] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of a simple shallow root isolation system;

[0033] Figure 2 This is a schematic diagram of a simple deep root type root isolation system;

[0034] Figure 3 This is a schematic diagram of a complex shallow root isolation system;

[0035] Figure 4 This is a schematic diagram of a complex deep root isolation system.

[0036] Explanation of the reference numerals: 1 isolation groove unit, 2 filler unit, 3 surface filler layer, 4 surface isolation non-woven fabric layer, 5 filler boundary non-woven fabric layer, 6 bottom filler layer, 7 middle filler layer. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0038] In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] The environmentally friendly root isolation system technology that prevents the disorderly growth of emergent plants in rivers, lakes and ponds takes into account the buried wetland purification system technology in rivers, lakes and ponds. The system technology includes two types: simple and complex, and is divided into shallow root type and deep root type according to the characteristics of the roots of emergent plants. The technical structure of both simple and complex systems is mainly composed of isolation tank units and filler units. Among them, the deep root type is aimed at plants such as reeds, lilies, and lotus, and the shallow root type is aimed at plants such as cattails and sedge.

[0040] By constructing an isolation tank unit in the water body, a physical isolation space is formed between the invasive emergent plants and ordinary aquatic plants, preventing plant species with strong ecological invasive power from encroaching on other plants through their roots. On the basis of the isolation tank, fillers are filled into it, and aerobic zones, facultative anoxic zones and anaerobic zones are formed in sequence from the top of the isolation tank to the bottom, thereby providing different oxygen-containing living environments for various types of background microorganisms in the water body, forming favorable conditions for the expansion and recovery of background microbial communities. After planting emergent plants, some roots will be closely combined with the fillers, strengthening the plant body to resist the impact of high-velocity water bodies, improving the survival rate, reducing construction costs, and forming an underground wetland system at the same time, laying the foundation for strengthening the water quality capacity of the water body's own ecosystem and improving the biodiversity of the water body ecosystem. In addition, non-woven fabrics of certain specifications are set at special positions of the filler unit to prevent the water body sedimentation mud from clogging the filler and the mutual influence between fillers of different particle sizes, thereby improving the overall functional effect of the system technology.

[0041] Examples 1 to 4 illustrate various preferred embodiments of the present invention.

[0042] Example 1

[0043] Simple shallow root system

[0044] like Figure 1 As shown, along the emergent plant planting sample line as the starting edge, the side toward the center of the water body as the width edge, and the bottom elevation of the water body as the benchmark, the isolation trough unit is excavated downward, and the filling unit is filled in the isolation trough unit, so that the space below the top of the isolation trough forms an aerobic zone, a facultative anoxic zone and an anaerobic zone in turn, so that different emergent plants are separated by the isolation trough units, preventing plant species with strong ecological invasive ability from encroaching on other plants through their roots.

[0045] When the emergent plants are of shallow root type, the width of the isolation trough unit is 30 cm, the depth is 40 cm, and the length is set according to the partition length of different emergent plants.

[0046] The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary as a packing boundary, a surface packing layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer.

[0047] The bottom filler layer is formed by laying crushed stone and gravel with a particle size of 2-4 cm and a porosity of 35-45% with a thickness of 10 cm;

[0048] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid.

[0049] The surface isolation non-woven fabric layer is formed by laying a 20 cm thick surface filler layer to form an oxygen-enriched zone, and the surface isolation non-woven fabric layer covers the top surface of the surface filler layer. The non-woven fabric specification used in the surface isolation non-woven fabric layer is 200g / m 2 The non-woven fabric is then laid, and finally a surface filler layer with a thickness of 10 cm is laid to form an aerobic zone; the surface filler layer is made of crushed stone and gravel with a particle size of 0.5-2 cm and a porosity of 30-35%.

[0050] Example 2

[0051] Simple deep root system

[0052] like Figure 2 As shown, when the emergent plant is a deep root type, the width of the isolation tank unit is set to 50 cm, the depth is set to 100 cm, and the length is set according to the partition length of different emergent plants;

[0053] The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary as a packing boundary, a surface packing layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer.

[0054] The bottom filler layer is formed by laying 40cm thick crushed stone and gravel with a particle size of 2-4cm and a porosity of 35-45%;

[0055] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid. The non-woven fabric specification used by the non-woven fabric layer at the filler boundary is 200g / m 2 Non-woven fabrics;

[0056] The surface isolation non-woven fabric layer is a layer of 50 cm thick surface filler, and then the surface isolation non-woven fabric layer covers the top surface of the surface filler layer. The non-woven fabric specification used in the surface isolation non-woven fabric layer is 200g / m 2 non-woven fabric, and finally a surface filler layer with a thickness of 10 cm; the surface filler layer is made of crushed stone and gravel with a particle size of 0.5-2 cm and a porosity of 30-35%.

[0057] Example 3

[0058] Complex shallow root system

[0059] like Figure 3 As shown, when the emergent plants are shallow root type, the width of the isolation tank unit is set to 30 cm, the depth is set to 40 cm, and the length is set according to the partition length of different emergent plants;

[0060] The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary as a packing boundary, a surface packing layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer.

[0061] The bottom filler layer is made of volcanic rock with a particle size of 2-4 cm and a porosity of 35-45% and is laid to a thickness of 10 cm;

[0062] The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid. The non-woven fabric specification used by the non-woven fabric layer at the filler boundary is 200g / m 2 Non-woven fabrics;

[0063] The surface isolation non-woven fabric layer is a 20 cm thick surface filler layer, and then the surface isolation non-woven fabric layer covers the top surface of the surface filler layer. The non-woven fabric specification used in the surface isolation non-woven fabric layer is 200g / m 2 The non-woven fabric is then laid, and finally a surface filler layer with a thickness of 10 cm is laid; the surface filler layer is made of limestone with a particle size of 0.5-2 cm and a porosity of 30-35%;

[0064] Example 4

[0065] Complex deep root system

[0066] like Figure 4As shown, when the emergent plants are deep-rooted, the width of the isolation trough unit is set to 50 cm, the depth is set to 100 cm, and the length is set according to the partition length of different emergent plants; the filler unit includes from bottom to top: a bottom filler layer, a non-woven fabric layer at the filler boundary, a middle filler layer, an isolation non-woven fabric layer at the surface, and a surface filler layer.

[0067] The bottom filler layer is made of volcanic rock with a particle size of 4-15cm and a porosity of 45-55% and is laid 40cm thick; the non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid, and the non-woven fabric specification of the non-woven fabric layer at the filler boundary is 200g / m 2 The middle filler layer is composed of limestone and volcanic rock with a particle size of 2-4 cm, and is laid on the non-woven fabric layer at the filler boundary with a porosity of 35-45% and a thickness of 40 cm; after laying the middle filler layer, the isolation non-woven fabric layer is laid on the surface, covering the top surface of the middle filler layer with a specification of 200g / m 2 a surface filler layer is laid on the surface isolation non-woven fabric layer, wherein the surface filler layer is made of gravel with a particle size of 0.5-2cm and a porosity of 30-35% and a thickness of 20cm.

[0068] Experimental comparison

[0069] 1.1 Simple shallow root system type and complex shallow root system type test group

[0070] Canna and cattail were planted in four ponds of the same specifications, with a planting ratio of 50% each. The water in the pond was original water, and the water quality indicators of chemical oxygen demand (CODcr), total phosphorus (TP), and ammonia nitrogen (NH3-N) were all inferior to Class V, 55 mg / L, 0.52 mg / L, and 3.8 mg / L, respectively, and dissolved oxygen (DO) was 8 mg / L. Group A: One of the ponds was set up with a root isolation system in the manner of Example 1; Group B: The second pond was set up with a root isolation system in the manner of Example 3; Group C: The second pond used the existing PVC board to separate the canna and cattail planting areas; Group D: The remaining pond was used as a blank control group, and no other system settings were performed.

[0071] After one growing season, the proportion of the survival area of ​​canna and cattail in group A and group B was 50% and 50% of the pond respectively; the proportion of the survival area of ​​canna and cattail in group C was 48% and 52% of the pond respectively; the proportion of the survival area of ​​canna and cattail in group D was 36% and 64% of the pond respectively.

[0072] After two growing seasons, there was no encroachment problem between aquatic plants in Groups A, B and C. However, the use of PVC boards in Group C was not environmentally friendly. In Group D, cattails encroached on cannas in two growing seasons, with an encroachment rate of 28%.

[0073] After two growing seasons, the water quality of Group A was tested to have a chemical oxygen demand (CODcr) of 33 mg / L, total phosphorus (TP) of 0.29 mg / L, ammonia nitrogen (NH3-N) of 1.53 mg / L, and dissolved oxygen (DO) of 12.5 mg / L.

[0074] The water quality test results of Group B showed that the chemical oxygen demand (CODcr) was 28 mg / L, the total phosphorus (TP) was 0.25 mg / L, the ammonia nitrogen (NH3-N) was 1.47 mg / L, and the dissolved oxygen (DO) was 10.4 mg / L.

[0075] The water quality test results of Group C showed that the chemical oxygen demand (CODcr) was 41 mg / L, the total phosphorus (TP) was 0.44 mg / L, the ammonia nitrogen (NH3-N) was 1.98 mg / L, and the dissolved oxygen (DO) was 13.5 mg / L.

[0076] The water quality test results of Group D showed that the chemical oxygen demand (CODcr) was 38 mg / L, the total phosphorus (TP) was 0.41 mg / L, the ammonia nitrogen (NH3-N) was 1.87 mg / L, and the dissolved oxygen (DO) was 11.7 mg / L.

[0077] 1.2 Simple deep root system type and complex deep root system type test group

[0078] In four ponds of the same specifications, yellow iris and reeds were planted in different areas, with a planting ratio of 50% each. The water in the ponds was original water, and the water quality indicators of chemical oxygen demand (CODcr), total phosphorus (TP), and ammonia nitrogen (NH3-N) were all inferior to Class V, 55 mg / L, 0.52 mg / L, and 3.8 mg / L, respectively, and the dissolved oxygen (DO) was 8 mg / L. Group A: One of the ponds was set up with a root isolation system in the manner of Example 2; Group B: The second pond used the existing PVC board to separate the planting areas of yellow iris and reeds; Group C: The remaining pond was used as a blank control group, and no other system settings were performed.

[0079] After one growing season, the proportion of the survival area of ​​iris and reed in the ponds of group A and group B were 50% and 50% respectively; the proportion of the survival area of ​​iris and reed in the ponds of group C were 46% and 54% respectively; the proportion of the survival area of ​​iris and reed in the ponds of group D were 39% and 61% respectively.

[0080] After two growing seasons, there was no encroachment problem between aquatic plants in Groups A, B and C. However, the use of PVC boards in Group C was not environmentally friendly. In Group D, reeds encroached on yellow iris in two growing seasons, with an encroachment rate of 22%.

[0081] After two growing seasons, the water quality of Group A was tested to have a chemical oxygen demand (CODcr) of 28 mg / L, total phosphorus (TP) of 0.28 mg / L, ammonia nitrogen (NH3-N) of 1.38 mg / L, and dissolved oxygen (DO) of 13.7 mg / L.

[0082] The water quality test results of Group B showed that the chemical oxygen demand (CODcr) was 23 mg / L, the total phosphorus (TP) was 0.22 mg / L, the ammonia nitrogen (NH3-N) was 1.13 mg / L, and the dissolved oxygen (DO) was 12.9 mg / L.

[0083] The water quality test results of Group C showed that the chemical oxygen demand (CODcr) was 43 mg / L, the total phosphorus (TP) was 0.41 mg / L, the ammonia nitrogen (NH3-N) was 1.73 mg / L, and the dissolved oxygen (DO) was 12.5 mg / L.

[0084] The water quality test results of Group D showed that the chemical oxygen demand (CODcr) was 36 mg / L, the total phosphorus (TP) was 0.37 mg / L, the ammonia nitrogen (NH3-N) was 1.47 mg / L, and the dissolved oxygen (DO) was 13.8 mg / L.

[0085] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. An environmentally friendly root isolation system with biological purification function, characterized in that: With the emergent plant planting sample line as the starting edge, the side toward the center of the water body as the width edge, and the elevation of the bottom of the water body as the benchmark, the isolation tank unit is expanded downward, and the filler unit is filled in the isolation tank unit, so that the space below the top of the isolation tank forms an aerobic zone, an anoxic zone and an anaerobic zone in sequence; When the emergent plants are deep-rooted, the width of the isolation tank unit is set to at least 40 cm, the depth is set to at least 80 cm, and the length is set according to the partition length of different emergent plants; The packing unit comprises from bottom to top: a bottom packing layer, a non-woven fabric layer at the packing boundary, a surface packing layer, and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface packing layer; The bottom filler layer is formed by paving crushed stone and / or gravel with a particle size of 2-4 cm and a porosity of 35-45%; The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid; The surface isolation non-woven fabric layer is used to cover the top surface of the surface filler layer after the surface filler is laid. The non-woven fabric specification used in the surface isolation non-woven fabric layer is 200g / m 2 The non-woven fabric is then laid, and finally a surface filler layer of a certain thickness is laid; the surface filler layer is made of crushed stone and / or gravel with a particle size of 0.5-2 cm and a porosity of 30-35%; The bottom filler layer is made of other material fillers with a particle size of 4-15 cm and a porosity of 45-55%; The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid; The middle filler layer is composed of other material fillers with a particle size of 2-4 cm, and is laid on the non-woven fabric layer at the filler boundary with a porosity of 35-45%; After laying the middle filler layer, lay the isolation non-woven fabric layer on the surface; lay the surface filler layer on the isolation non-woven fabric layer on the surface, wherein the surface filler layer is composed of crushed stone, gravel and / or other material fillers with a particle size of 0.5-2 cm, and is laid with a thickness of 20 cm at a porosity of 30-35%; The other material fillers are fillers containing limestone, volcanic rock and / or embedded bacterial agents.

2. The environmentally friendly root isolation system with biological purification function as claimed in claim 1, characterized in that: When the emergent plants are shallow root type, the width of the isolation tank unit is set to at least 20 cm, the depth is set to at least 30 cm, and the length is set according to the partition length of different emergent plants; The filler unit comprises from bottom to top: a bottom filler layer, a non-woven fabric layer at the filler boundary, a surface filler layer and a surface isolation non-woven fabric layer arranged at the upper inner part of the surface filler layer.

3. The environmentally friendly root isolation system with biological purification function as claimed in claim 2, characterized in that: The bottom filler layer is formed by paving crushed stone and / or gravel with a particle size of 2-4 cm and a porosity of 35-45%; The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid; The surface isolation non-woven fabric layer is formed by laying a certain thickness of the surface filler layer to form an aerobic zone, the surface isolation non-woven fabric layer is covered with the top surface of the surface filler layer, and finally a certain thickness of the surface filler layer is laid to form an aerobic zone; the surface filler layer is formed by laying crushed stone and / or gravel with a particle size of 0.5-2cm and a porosity of 30-35%.

4. The environmentally friendly root isolation system with biological purification function as claimed in claim 2, characterized in that: The bottom filler layer is made of volcanic rock or other material fillers with a particle size of 2-4 cm and a porosity of 35-45%; The non-woven fabric layer at the filler boundary is used to cover the entire top surface of the bottom filler layer after the bottom filler layer is laid; The surface isolation non-woven fabric layer is formed by laying a certain thickness of surface filler, then covering the top surface of the surface filler layer with the surface isolation non-woven fabric layer, and finally laying a certain thickness of surface filler layer; the surface filler layer is formed by laying limestone or other material fillers with a particle size of 0.5-2cm and a porosity of 30-35%; The other material fillers are fillers containing limestone, volcanic rock and / or embedded bacterial agents.

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