A floating island artificial wetland treatment system based on a lake center platform

Abstract

The present invention discloses a floating island artificial wetland treatment system based on a lake center platform, which relates to the field of ecological interception of pollutants in eutrophic water bodies, water quality improvement and decentralized sewage treatment, and includes: a water purification lake center platform, a water intake subsystem including multiple water intake filling columns, a drainage subsystem including one or more drainage filling columns, a water collection and distribution subsystem including multiple water collection tanks, and a platform wetland subsystem; the drainage filling column is located at the center of the bottom of the water purification lake center platform, and multiple water intake filling columns are evenly distributed at the edge of the bottom of the water purification lake center platform with the drainage filling column as the center; the platform wetland subsystem is located in the central area of ​​the upper surface of the water purification lake center platform, and multiple water collection tanks are evenly distributed at the edge of the upper surface of the water purification lake center platform with the platform wetland subsystem as the center. The present invention realizes the purpose of de-eutrophication of water bodies in situ without occupying the land beside the water area to be purified.

Description

Technical Field

[0001] The invention relates to the fields of ecological interception of pollutants in eutrophic water bodies, water quality improvement and decentralized sewage treatment, and in particular to a floating island type artificial wetland treatment system based on a lake center platform. Background Art

[0002] In reality, a large number of shallow lakes need to be treated for eutrophication and lake ecological restoration. Therefore, it is of great significance to carry out ecological restoration of shallow lakes and related control of algal blooms. The ecological service functions and regained service value are also more important.

[0003] At present, the technologies for river and lake ecological restoration mainly include submerged vegetation restoration, plant community mosaic, artificial wetland treatment, artificial floating islands, sediment dredging, algal bloom prevention and water purification, blue algae collection and concentration, fish community structure regulation and other technologies; among them, artificial wetland treatment technology, as a mature sewage treatment technology, is widely used in onshore sewage treatment, and is partially used for water purification in river tributaries. Due to the low engineering construction and operation costs and easy maintenance of artificial wetland treatment technology, it has received widespread attention and comprehensive promotion. Against the background of the increasing demand for eutrophic water body treatment, it has a broad application space in the in-situ treatment of rivers and lakes. However, the development of artificial wetland technology in river and lake management is hindered by factors such as large water level fluctuations, environmental sensitivity, increasing water quality requirements, and surrounding available land. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of existing in-situ treatment technologies for water eutrophication, and to provide a floating island artificial wetland treatment system based on a lake center platform, so as to achieve the purpose of de-eutrophication of water bodies in situ without occupying the land next to the water area to be purified.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A floating island artificial wetland treatment system based on a lake center platform, comprising: a water purification lake center platform, a water inlet subsystem, a drainage subsystem, a water collection and distribution subsystem and a platform wetland subsystem; the water inlet subsystem comprises a plurality of water inlet filling columns and a water collection part arranged on each of the water inlet filling columns; the drainage subsystem comprises one or more drainage filling columns and a drainage part arranged on each of the drainage filling columns; the water inlet filling columns and the drainage filling columns are filled with a variety of fillings; the water collection and distribution subsystem comprises a plurality of water collection tanks and a water distribution pipe arranged between each of the water collection tanks; the platform wetland subsystem is filled with a variety of fillings;

[0007] The water inlet filling column and the drainage filling column are both installed at the bottom of the water purification lake center platform, and the water collection and distribution subsystem and the platform wetland subsystem are installed on the water purification lake center platform; wherein the drainage filling column is located at the center of the water purification lake center platform, and a plurality of the water inlet filling columns are evenly distributed at the edge of the water purification lake center platform with the drainage filling column as the center; the platform wetland subsystem is located in the central area of ​​the water purification lake center platform, and a plurality of the water collection tanks are evenly distributed at the edge of the water purification lake center platform with the platform wetland subsystem as the center, and the water distribution pipe is arranged on the platform wetland subsystem;

[0008] During operation, the water purification lake center platform is located in the water area to be purified, and the sewage to be purified in the water area to be purified is introduced into the water inlet filling column through the water collection part, and after being filtered once by the water inlet filling column, the water obtained after the first filtering treatment is introduced into the water collection tank, and the water obtained after the first filtering treatment is introduced into the platform wetland subsystem through the water distribution pipes arranged between the respective water collection tanks; after being filtered twice by the platform wetland subsystem, the water obtained after the second filtering treatment flows into the drainage filling column, and after being filtered three times by the drainage filling column, the water obtained after the three filtering treatments is discharged through the drainage part.

[0009] Optionally, the water collection part includes a porous water inlet bin and a water collection pump; the water inlet packing column includes a fourth packing layer, a third packing layer, a second packing layer and a first packing layer from bottom to top; a porous water inlet bin is installed at the bottom of the fourth packing layer; and water collection pumps are installed on both the second packing layer and the first packing layer;

[0010] The first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

[0011] Optionally, the drainage part at least includes a movable porous water outlet turntable; the drainage filling column includes a fourth filling layer, a third filling layer, a second filling layer and a first filling layer from bottom to top; the movable porous water outlet turntable is installed at the bottom of the fourth filling layer;

[0012] The first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

[0013] Optionally, a semi-flexible support structure and amphibious aquatic plants planted on the semi-flexible support structure are provided inside the water collection tank;

[0014] The water collection tank is provided with a water inlet hole and a water outlet hole, and the height of the water inlet hole is lower than the height of the water outlet hole; the water inlet hole is used to introduce the water after the primary filtration treatment into the water collection tank; the water outlet hole is connected with the water distribution pipe;

[0015] The water distribution pipes are arranged in a tic-tac-toe pattern on the platform wetland subsystem.

[0016] Optionally, the semi-flexible support structure includes a water-retaining and water-absorbent cotton pad layer and a quartz sand layer from bottom to top.

[0017] Optionally, the platform wetland subsystem includes a filler frame; in the filler frame, a substrate cushion layer, a filler structure layer and a surface covering water retention layer are sequentially arranged from bottom to top;

[0018] The water distribution pipe is arranged on the surface covering water retaining layer;

[0019] The packing structure layer is composed of 3 or more packing layers, and each packing layer includes a first packing bag, a second packing bag, a third packing bag and a fourth packing bag which are staggered and stacked;

[0020] The filler in the first filler bag is honeycomb activated zeolite; the filler in the second filler bag is granular biomass carbon and FeS 2 Mineral particles; the filler in the third filling bag is lightweight ceramsite; the filler in the fourth filling bag is a molecular sieve porous lightweight material.

[0021] Optionally, the substrate cushion layer is composed of a special mesh cloth; the special mesh cloth comprises an anti-seepage membrane, a coconut fiber layer and a carbon fiber layer from bottom to top;

[0022] The material of the surface covering water-retaining layer is PP cotton.

[0023] Optionally, it also includes a wind and photovoltaic distributed power supply subsystem and a wetland plant subsystem;

[0024] Among them, the wind energy photovoltaic distributed power supply subsystem is set at the edge of the water purification lake center platform, and the wetland plant subsystem is arranged on the water distribution pipe.

[0025] Optionally, the water purification lake center platform includes a platform, a fence and a support frame; the platform is a water collection cavity structure; the support frame is installed on the platform, and the fence is fixed to the platform through the support frame; the water collection and distribution subsystem, the platform wetland subsystem and the wetland plant subsystem are arranged inside the fence, and a wind energy photovoltaic distributed power supply subsystem is arranged outside the fence.

[0026] Optionally, the wetland plant subsystem includes fillers, plant planting hole molds and wetland plants in order from bottom to top;

[0027] The filler is arranged on the water distribution pipe; the filler is a two-layer structure, the lower filler is water-absorbing sponge, and the upper filler is a support body for planting wetland plants.

[0028] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0029] The present invention provides a floating island artificial wetland treatment system based on a lake center platform. When working, the water purification lake center platform is located in the water area to be purified, and the sewage to be purified in the water area to be purified is introduced into the water inlet filling column through the water collection part, and after the water is filtered once by the water inlet filling column, the water obtained after the primary filtration treatment is introduced into the water collection tank, and the water after the primary filtration treatment is introduced into the platform wetland subsystem through the water distribution pipes arranged between each of the water collection tanks; after the secondary filtration treatment by the platform wetland subsystem, the water obtained after the secondary filtration treatment flows into the drainage filling column, and after the tertiary filtration treatment by the drainage filling column, the water obtained after the tertiary filtration is discharged through the drainage part, so as to achieve the purpose of de-eutrophication of the water body in situ without occupying the land beside the water area to be purified. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 This is a structural schematic diagram of a floating island artificial wetland treatment system based on a lake center platform of the present invention;

[0032] Figure 2 This is a schematic diagram of the physical design of a floating island artificial wetland system based on a lake center platform of the present invention;

[0033] Figure 3 It is a schematic diagram of the physical design of the water inlet packing column of the present invention;

[0034] Figure 4 It is a schematic diagram of the physical design of the water inlet packing column of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments 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.

[0036] The purpose of the present invention is to provide a floating island artificial wetland treatment system based on a lake center platform, so as to achieve the purpose of de-eutrophication of water bodies in situ without occupying the land beside the water area to be purified.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Although artificial wetland technology is a sewage treatment technology and water purification technology with broad application prospects, there are certain problems in its promotion and use, mainly manifested in the following aspects: First, the hydraulic load of wetlands is limited, resulting in a large wetland area. Compared with conventional sewage treatment processes, artificial wetlands occupy at least twice the area, making it difficult to promote in places with tight land use or high land prices; Second, as the operation time of wetlands increases, some nutrients will gradually accumulate. If they are not properly maintained, siltation, blockage, and clogging will easily occur, which will reduce hydraulic conductivity and wetland treatment efficiency. and shortened operation life; third, with the continuous operation of the sewage treatment process, the adsorption capacity of the matrix will tend to be saturated after a few years, which will also affect the treatment effect of the wetland; fourth, aquatic plants and microorganisms need a certain amount of water to survive, so artificial wetlands are difficult to resist drought climates; fifth, some subsurface flow wetlands with unreasonable design, construction or maintenance management will cause surface water accumulation; sixth, surface flow wetlands have a large water surface, which will cause a large number of mosquitoes and flies to breed, threatening the health of people around the wetland; seventh, due to the existence of certain anoxic and anaerobic zones in artificial wetlands, certain anaerobic reactants (such as H 2 S, odorous substances) will diffuse into the air and cause the spread of odor; eighth, lower temperatures can weaken the various biological activities of the wetland system. Plants that stagnate or die during low temperatures will reduce the oxygen release capacity of the wetland or even stop releasing oxygen, thereby reducing or losing the ability to purify wastewater; ninth, there are problems such as wetland plant diseases and insect pests, fires, their own growth cycle, and related maintenance, restoration and management; tenth, innovative applications in other fields, etc.

[0039] Since the proposal and development of artificial wetland technology is still relatively short, the technological development still cannot meet the current social needs. In the application of artificial wetlands, it mainly relies on experience, and there is a tendency to overly indulge natural conditions and ignore artificial enhancement, which affects the achievable treatment effects of different loads, such as: the best combination and three-dimensional intersection of aquatic plant species suitable for different regional conditions, the process of pretreatment, post-treatment, distribution, water collection, etc., the scientific configuration of bed materials, wetland structural types and alternating flow characteristics of submerged and surface water layers and their design theories and methods are rarely studied, lacking systematicity and integrity. In addition to the heavy nitrogen and phosphorus pollution, eutrophic water bodies also have prominent problems of hypoxia and algal bloom risks. Water flow aeration can alleviate the problem of underwater hypoxia; biological suspended matter such as algae blooms in water bodies and medium-sized aquatic animals in water bodies need to be intercepted during the in-situ treatment process. At present, such a complex, ecological and landscaped purification system has not been seen in the treatment of eutrophic water bodies.

[0040] In order to promote the control of water eutrophication and to more efficiently and practically control the eutrophication problem or algal bloom risk problem in the static water area of ​​the aquatic ecosystem (lakes, rivers and reservoirs, etc.), the present invention provides a floating island artificial wetland treatment system using a lake center platform, which is a new in-situ long-term control technology, platform and application of eutrophic water bodies in rivers and lakes.

[0041] Embodiment 1

[0042] like Figure 1 As shown, the present embodiment provides a floating island artificial wetland treatment system based on a lake center platform, comprising: a water purification lake center platform 1, a water inlet subsystem 2, a drainage subsystem 3, a water collection and distribution subsystem 4 and a platform wetland subsystem 5; the water inlet subsystem 2 comprises a plurality of water inlet filling columns and a water collection part arranged on each of the water inlet fillings; the drainage subsystem 3 comprises one or more drainage filling columns and a drainage part arranged on each of the drainage fillings; the water inlet filling columns and the drainage filling columns are filled with a variety of fillings; the water collection and distribution subsystem 4 comprises a plurality of water collecting tanks and water distribution pipes arranged between the water collecting tanks; the platform wetland subsystem 5 is filled with a variety of fillings;

[0043] The water inlet filling column and the drainage filling column are both installed at the bottom of the water purification lake center platform 1, and the water collection and distribution subsystem and the platform wetland subsystem 5 are installed on the water purification lake center platform 1; wherein, the drainage filling column is located at the center of the water purification lake center platform 1, and multiple water inlet filling columns are evenly distributed at the edge of the water purification lake center platform 1 with the drainage filling column as the center; the platform wetland subsystem 5 is located in the central area of ​​the water purification lake center platform 1, and multiple water collection troughs are evenly distributed at the edge of the water purification lake center platform 1 with the platform wetland subsystem 5 as the center, and the water distribution pipes are arranged on the platform wetland subsystem 5.

[0044] During operation, the water purification lake center platform 1 is located in the water area to be purified, and the sewage to be purified in the water area to be purified is introduced into the water inlet filling column through the water collection part, and after being filtered once by the water inlet filling column, the water obtained after the first filtering treatment is introduced into the water collection tank, and the water obtained after the first filtering treatment is introduced into the platform wetland subsystem 5 through the water distribution pipes arranged between the respective water collection tanks; after being filtered twice by the platform wetland subsystem 5, the water obtained after the second filtering treatment flows into the drainage filling column, and after being filtered three times by the drainage filling column, the water obtained after the three filtering treatments is discharged through the drainage part.

[0045] The water inlet subsystem 2 described in this embodiment also includes a plastic steel structure fixing frame for fixing the water inlet filling column; the water collecting part includes a porous water inlet bin and a water collecting pump; in the water inlet filling column, from bottom to top, it includes a fourth filling layer, a third filling layer, a second filling layer and a first filling layer; a porous water inlet bin is installed at the bottom of the fourth filling layer; and a water collecting pump is installed on the second filling layer and the first filling layer.

[0046] Preferably, the first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

[0047] Preferably, the number of the water inlet packing columns is 4, and the size of each water inlet packing column is Φ600-1200 mm, and the height is 2-4 m.

[0048] Preferably, the water collecting pump comprises a water collecting hole and a vacuum pump arranged in the water collecting hole.

[0049] The drainage subsystem 3 described in this embodiment also includes a plastic steel structure fixing frame for fixing the drainage filling column; the drainage part includes at least a movable porous water outlet turntable. In the drainage filling column, from bottom to top, it includes a fourth filling layer, a third filling layer, a second filling layer and a first filling layer; a movable porous water outlet turntable is installed at the bottom of the fourth filling layer.

[0050] Preferably, the first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

[0051] Preferably, the number of the drainage filling columns is 1, and the size of each of the filling water filling columns is Φ600-1200 mm, and the height is 2-4 m.

[0052] A semi-flexible support structure and amphibious aquatic plants (such as Schefflera heterophylla, water turtle, Myriophyllum paniculate, and Nymphoides) planted on the semi-flexible support structure are arranged inside the water collection tank in the water collection and distribution subsystem 4 described in this embodiment.

[0053] The water collection tank is provided with a water inlet and a water outlet, and the height of the water inlet is lower than that of the water outlet; the water inlet is used to introduce the water after the primary filtration treatment into the water collection tank; the water outlet is connected to the water distribution pipe; the water distribution pipe is arranged in a tic-tac-toe form on the platform wetland subsystem

[0054] The semi-flexible support structure comprises a water-retaining and water-absorbent cotton pad layer and a quartz sand layer from bottom to top; wherein the height of the water-retaining and water-absorbent cotton pad layer is 1 to 3 cm, and the height of the quartz sand layer is 3 to 5 cm.

[0055] Preferably, the water collection tank is made of fiberglass; the width of the water collection tank is 40 cm and the height is 50 cm; the water outlet of the water collection tank is arranged at 5 to 10 cm from the bottom.

[0056] Preferably, the water distribution pipe is an uneven porous drip irrigation pipe.

[0057] Preferably, the number of the water collecting tanks is greater than or equal to the number of the water inlet packing columns. For example, 16 water collecting tanks are provided, and 4 water collecting tanks are provided on each side of the water purification lake center platform.

[0058] The platform wetland subsystem 5 described in this embodiment includes a packing frame with a height of 0.7 to 1 m and made of glass or plastic steel; in the packing frame, a substrate cushion layer, a packing structure layer and a surface covering water retention layer are arranged in sequence from bottom to top.

[0059] The packing structure layer is composed of 3 or more packing layers, and each packing layer is composed of a first packing bag, a second packing bag, a third packing bag and a fourth packing bag stacked in an staggered manner. The packing bags of each packing layer are randomly composed of the above four types and are the same, but the packing bags are not connected to each other.

[0060] Preferably, the filler in the first filler bag is honeycomb activated zeolite; the filler in the second filler bag is granular biomass carbon and FeS2 Mineral particles; the filler in the third filling bag is lightweight ceramsite; the filler in the fourth filling bag is a molecular sieve porous lightweight material.

[0061] Preferably, the substrate cushion layer described in this embodiment is composed of a special mesh cloth; the special mesh cloth comprises an impermeable membrane, a coconut fiber layer and a carbon fiber layer from bottom to top.

[0062] Preferably, the material of the surface covering water-retaining layer described in this embodiment is PP cotton.

[0063] Furthermore, after the packing bag is arranged in the packing frame, before the system is put into trial operation, a layer of high-efficiency denitrifying bacteria agent is sprinkled on the surface covering water-retaining layer.

[0064] The floating island artificial wetland treatment system based on the lake center platform described in this embodiment also includes a wind energy photovoltaic distributed power supply subsystem and a wetland plant subsystem 6.

[0065] The wind energy photovoltaic distributed power supply subsystem described in this embodiment includes solar photovoltaic panels, photovoltaic power generation controllers, small wind turbines, wind power generation controllers, battery packs, and connecting wires. In the wind energy photovoltaic distributed power supply subsystem, wind power generation controllers, battery packs and photovoltaic power generation controllers arranged horizontally therewith, connecting wires, and solar photovoltaic panels and small wind turbines are arranged upwards.

[0066] The wetland plant subsystem described in this embodiment is arranged on the water distribution pipe; in the wetland plant subsystem, fillers, plant planting hole molds and wetland plants (such as cattail, canna, and variegated reed) are included from bottom to top.

[0067] Preferably, the filler described in this embodiment is a two-layer structure, the lower layer filler is absorbent sponge, and the upper layer filler is a support for planting wetland plants.

[0068] The wetland plant subsystem described in this embodiment is also provided with fungal agents (such as Penicillium oxalicum and Glomus, which are added to the root system of the wetland plants after the wetland plants are set up, and the dosage is 50-150g per hole).

[0069] The water purification lake center platform 1 described in this embodiment includes a platform, a fence and multiple support frames; the platform is composed of a water collection cavity structure composed of double-layer tempered glass material or plastic steel material; the support frame is installed on the platform, and the fence is fixed to the platform through the support frame; a water collection and distribution subsystem, a platform wetland subsystem and a wetland plant subsystem are arranged inside the fence, and a wind energy photovoltaic distributed power supply subsystem is arranged outside the fence.

[0070] In terms of horizontal spatial layout, the water inlet subsystem is located at the outermost part of the bottom of the water purification lake center platform, and the drainage subsystem (a subsystem that is horizontal to the water inlet subsystem) is located at the center of the bottom of the water purification lake center platform; a wind energy photovoltaic distributed power supply subsystem is installed on the outermost part of the water purification lake center platform, and 4 water collection tanks, water distribution pipes, platform wetland subsystem and wetland plant subsystem are installed inward along the side of the water purification lake center platform.

[0071] In terms of vertical spatial layout, the water inlet subsystem (or drainage subsystem), the water purification lake center platform, the water collection and distribution subsystem (or platform wetland subsystem or wetland plant subsystem or wind energy photovoltaic distributed power supply subsystem) are arranged in sequence from bottom to top.

[0072] In terms of system connection, the water inlet subsystem is connected to the water collection tank in the water collection and distribution subsystem, and then the water distribution pipes are set up simultaneously; the water collection tank in the water collection and distribution subsystem is equipped with an interception system of amphibious aquatic plants; the water collection and distribution subsystem is connected to the platform wetland subsystem, wetland plant subsystem and drainage subsystem in turn; the wind energy and photovoltaic distributed power supply subsystem and the water purification lake center platform are the power supply, control facilities and supporting structure, which are the basic support for the operation of the treatment system.

[0073] The following is a specific application example of this system

[0074] According to the previous research results and the complex pollution characteristics of the waters, the following design Figure 2 , Figure 3 and Figure 4 The system shown is a floating island artificial wetland treatment system based on a lake center platform, which is mainly used for fixed-point water treatment of eutrophic small lakes or cofferdam waters polluted by heavy metals, and implements pumping and backwashing processes by relying on natural energy and backup power supply. The system consists of two parts. One is 5 or more packing columns, with a size of Φ600-1200mm and a height of 2-4m. The packing columns are anchored by a plastic steel structure fixing system. Four packing columns located at the edge are used for water intake, and one packing column located at the center is used for drainage. The packing inside the packing column is divided into 4 layers, which are honeycomb porous ceramic packing layer (packing 4), modified shale ceramsite packing layer (packing 3), biomass particle layer (packing 2), and waste red brick particle layer (packing 1) from bottom to top. The top two packing layers of the water inlet packing column are provided with 3-5 water collection holes, and pumps are provided in the water collection holes (the setting depth of the pump is lower than the lake water surface); the second is the water collection and secondary water purification platform, which is composed of a supporting frame made of lightweight aluminum alloy and a water collection cavity made of plastic steel. The base cushion layer is composed of a special mesh cloth of a layer of carbon fiber + coconut fiber + anti-seepage membrane, and 3 or more layers of staggered stacked packing bags (packing bag 1: honeycomb activated zeolite; packing bag 2: granular biomass carbon + FeS 2Mineral particles; filler bag 3: lightweight expanded clay; filler bag 4: molecular sieve porous lightweight material) constitute a filler system, including a water distribution pipeline; plant planting holes are set according to the space gaps between staggered stacking, and plants such as cattails are set in the plant planting holes to construct vegetation; wind energy and photovoltaic distributed power supply subsystems provide complementary electricity for intermittent or continuous pumping treatment.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A floating island artificial wetland treatment system based on a lake center platform, characterized in that: include: A water purification lake center platform, a water inlet subsystem, a drainage subsystem, a water collection and distribution subsystem, and a platform wetland subsystem; the water inlet subsystem includes a plurality of water inlet filler columns and a water collection portion provided on each of the water inlet fillers; the drainage subsystem includes one or more drainage filler columns, and a drainage portion provided on each of the drainage fillers; the water inlet filler columns and the drainage filler columns are filled with a variety of fillers; the water collection and distribution subsystem includes a plurality of water collection tanks and water distribution pipes provided between the water collection tanks; the platform wetland subsystem is filled with a variety of fillers; The water inlet filling column and the drainage filling column are both installed at the bottom of the water purification lake center platform, and the water collection and distribution subsystem and the platform wetland subsystem are installed on the water purification lake center platform; wherein the drainage filling column is located at the center of the water purification lake center platform, and a plurality of the water inlet filling columns are evenly distributed at the edge of the water purification lake center platform with the drainage filling column as the center; the platform wetland subsystem is located in the central area of ​​the water purification lake center platform, and a plurality of the water collection tanks are evenly distributed at the edge of the water purification lake center platform with the platform wetland subsystem as the center, and the water distribution pipe is arranged on the platform wetland subsystem; During operation, the water purification lake center platform is located in the water area to be purified, and the sewage to be purified in the water area to be purified is introduced into the water inlet filling column through the water collection part, and after the water is filtered once by the water inlet filling column, the water obtained after the primary filtering treatment is introduced into the water collection tank, and the water after the primary filtering treatment is introduced into the platform wetland subsystem through the water distribution pipes arranged between the water collection tanks; after the secondary filtering treatment by the platform wetland subsystem, the water obtained after the secondary filtering treatment flows into the drainage filling column, and after the tertiary filtering treatment by the drainage filling column, the water obtained after the tertiary filtering treatment is discharged through the drainage part; A semi-flexible support structure and amphibious aquatic plants planted on the semi-flexible support structure are arranged inside the water collection tank; The water collection tank is provided with a water inlet hole and a water outlet hole, and the height of the water inlet hole is lower than the height of the water outlet hole; the water inlet hole is used to introduce the water after the primary filtration treatment into the water collection tank; the water outlet hole is connected with the water distribution pipe; The water distribution pipes are arranged in a tic-tac-toe pattern on the platform wetland subsystem; The semi-flexible support structure includes, from bottom to top, a water-retaining and water-absorbent cotton pad layer and a quartz sand layer; The platform wetland subsystem comprises a filler frame; in the filler frame, a substrate cushion layer, a filler structure layer and a surface covering water retention layer are sequentially arranged from bottom to top; The water distribution pipe is arranged on the surface covering water retaining layer; The packing structure layer is composed of 3 or more packing layers, and each packing layer includes a first packing bag, a second packing bag, a third packing bag and a fourth packing bag which are staggered and stacked; Among them, the filler in the first filler bag is honeycomb activated zeolite; the filler in the second filler bag is granular biomass carbon and FeS2 ore particles; the filler in the third filler bag is lightweight ceramsite; the filler in the fourth filler bag is molecular sieve porous lightweight material; The substrate cushion layer is composed of mesh cloth; the mesh cloth comprises an anti-seepage membrane, a coconut fiber layer and a carbon fiber layer from bottom to top; The material of the surface covering water-retaining layer is PP cotton.

2. The floating island artificial wetland treatment system based on the lake center platform according to claim 1 is characterized in that: The water collection part includes a porous water inlet bin and a water collection pump; the water inlet packing column includes a fourth packing layer, a third packing layer, a second packing layer and a first packing layer from bottom to top; a porous water inlet bin is installed at the bottom of the fourth packing layer; the second packing layer and the first packing layer are both installed with a water collection pump; The first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

3. The floating island artificial wetland treatment system based on a lake center platform according to claim 1 is characterized in that: The drainage part at least comprises a movable porous water outlet turntable; the drainage filling column comprises a fourth filling layer, a third filling layer, a second filling layer and a first filling layer from bottom to top; the movable porous water outlet turntable is installed at the bottom of the fourth filling layer; The first filler layer is a waste red brick particle layer, the second filler layer is a biomass particle layer, the third filler layer is a modified shale ceramsite filler layer, and the fourth filler layer is a honeycomb porous ceramic filler layer.

4. The floating island artificial wetland treatment system based on a lake center platform according to claim 1 is characterized in that: It also includes wind and photovoltaic distributed power supply subsystems and wetland plant subsystems; Among them, the wind energy photovoltaic distributed power supply subsystem is set at the edge of the water purification lake center platform, and the wetland plant subsystem is arranged on the water distribution pipe.

5. The floating island artificial wetland treatment system based on the lake center platform according to claim 4 is characterized in that: The water purification lake center platform includes a platform, a fence and a support frame; the platform is a water collection cavity structure; the support frame is installed on the platform, and the fence is fixed to the platform through the support frame; the water collection and distribution subsystem, the platform wetland subsystem and the wetland plant subsystem are arranged inside the fence, and a wind energy photovoltaic distributed power supply subsystem is arranged outside the fence.

6. The floating island artificial wetland treatment system based on a lake center platform according to claim 4 is characterized in that: The wetland plant subsystem includes fillers, plant planting hole molds and wetland plants from bottom to top; The filler is arranged on the water distribution pipe; the filler is a two-layer structure, the lower filler is water-absorbing sponge, and the upper filler is a support body for planting wetland plants.

Images