Three-dimensional oxygenation device and three-dimensional oxygenation method

Abstract

This invention discloses a three-dimensional aeration device and method. The three-dimensional aeration device includes a loose layer, a magnetized component, a slow-release oxygen layer, a planting substrate, submerged plants, emergent plants, and benthic animals. The loose layer is laid on the surface of the bottom sediment layer of the water to be treated. The magnetized component is installed and fixed in the water to be treated. The slow-release oxygen layer is mixed into the bottom sediment of the water to be treated. The planting substrate is placed in the water to be treated, and the submerged plants are planted in the planting substrate. The three-dimensional aeration device of this application has a significant oxygenation effect, simple structure, and low cost.

Description

Technical Field

[0001] This application relates to the field of water ecological restoration technology, and in particular to a three-dimensional oxygenation device and a three-dimensional oxygenation method. Background Technology

[0002] With the intensification of eutrophication, the massive loss of submerged plants, frequent algal blooms, and increased aquatic respiration, dissolved oxygen in freshwater lakes worldwide has shown a significant downward trend. Furthermore, global warming is raising water temperatures and decreasing dissolved oxygen saturation, which also promotes algal growth in surface waters. The large amounts of settled algal debris further exacerbate the anoxic conditions in the bottom waters. Decreased dissolved oxygen leads to increased release fluxes of nutrients such as nitrogen and phosphorus from bottom sediments, exacerbating lake eutrophication and promoting the emission of greenhouse gases such as methane and nitrous oxide. Anoxic conditions also reverse the community patterns of aerobic / anaerobic microorganisms, resulting in mass mortality of fish and invertebrates and a loss of lake biodiversity.

[0003] Currently, in traditional techniques, restoring submerged vegetation can alleviate the decline in dissolved oxygen in lakes. Submerged plants can photosynthesize underwater, producing oxygen, some of which is released into the water column through the canopy and some is secreted into the sediment through the roots. This improves the oxygen content and dissolved oxygen distribution in both the water column and the sediment. Canopy-type submerged plants with high biomass close to the water surface release more oxygen into the water column, significantly increasing oxygenation in the water, but have a smaller effect on the sediment. Conversely, bottom-type submerged plants with biomass close to the sediment have a smaller effect on increasing oxygenation in the water, but a significant effect on the sediment. For example, *Elaeagnus pungens*, with its biomass concentrated near the sediment, has a high specific root length, root-to-shoot ratio, and total root length per plant, enabling it to transport oxygen to the sediment. However, since the root length is generally only 2cm to 10cm, the depth to which the transported oxygen penetrates the sediment is limited. Therefore, significantly higher dissolved oxygen concentrations can only be measured within 6cm of the *Elaeagnus pungens* root zone. While *Myriophyllum spicatum* also has numerous roots, the dissolved oxygen concentration in the sediment around its root zone is even lower than the control, indicating limited oxygen release from its roots. *Hydrilla verticillata* has almost no roots, and its oxygen release from the sediment is also extremely weak. Therefore, it is difficult to effectively increase the dissolved oxygen content of lakes, especially in the sediment, solely through submerged plants.

[0004] In addition, existing technologies include in-situ aeration to increase dissolved oxygen levels in lakes, but this method can easily exacerbate water pollution. Adding redox-promoting microorganisms, such as nitrifying and denitrifying bacteria, can regulate redox conditions in the sediment, promoting nitrogen conversion and increasing dissolved oxygen levels. Microbial fuel cells can also be used to convert organic matter in the sediment into electrical energy, releasing oxygen through electrochemical reactions, thereby increasing dissolved oxygen concentration. However, the effects of microorganisms and microbial fuel cells are effective but short-lived.

[0005] It is evident that traditional biological methods utilizing submerged plants and benthic animals, while offering long-lasting effects, require ensuring the survival and healthy growth of these organisms. This results in strict boundary conditions and limited applicability. Physicochemical methods, such as aeration or oxygen nanobubbles modifying mineral materials, suffer from high energy consumption and short-lived effects. Summary of the Invention

[0006] Therefore, it is necessary to provide a three-dimensional oxygenation device. The three-dimensional oxygenation device of the present invention can ensure that the upper layer of the water column and the bottom sediment surface layer can obtain sufficient oxygen, thereby achieving the purpose of three-dimensional oxygenation. It has a significant oxygenation effect, simple structure, and low cost.

[0007] One embodiment of this application provides a three-dimensional oxygenation device.

[0008] A three-dimensional oxygenation device includes a loose layer, a magnetized component, a slow-release oxygen layer, a planting substrate, submerged plants, emergent plants, and benthic animals. The loose layer is used to lay on the surface of the bottom sediment layer of the water to be treated. The magnetized component is installed and fixed in the water to be treated. The slow-release oxygen layer is used to mix into the bottom sediment of the water to be treated. The planting substrate is used to place in the water to be treated. The submerged plants are planted in the planting substrate.

[0009] In some embodiments, the thickness of the porous layer is 1 cm to 2 cm.

[0010] In some embodiments, the material of the loose layer includes 40wt%~50wt% coconut fiber clay, 20wt%~30wt% coconut fiber, and 20wt%~30wt% loofah sponge.

[0011] In some embodiments, the magnetizing component includes multiple magnetizing rods, which are inserted 40cm to 50cm into the bottom mud layer during installation, and whose tops are 10cm to 15cm above the water level before drainage.

[0012] In some embodiments, the material of the slow-release oxygen layer includes CaO2, kaolin, and cement, wherein the mass ratio of CaO2, kaolin, and cement is (2~3):1:1.

[0013] In some embodiments, the planting substrate includes dried substrate, oxygen nanobubble modified particles, and maifanite, wherein the volume ratio of dried substrate, oxygen nanobubble modified particles, and maifanite is (5~7):1:1.

[0014] In some embodiments, the submerged plant includes Vallisneria natans; the planting density of the submerged plant is 8 plants / m² to 24 plants / m².

[0015] In some embodiments, the emergent plants include Myriophyllum spicatum, and the planting density of the emergent plants is 8 plants / m² to 16 plants / m².

[0016] And / or, the benthic animals include chironomid larvae.

[0017] One embodiment of this application provides a three-dimensional oxygenation method.

[0018] A three-dimensional oxygenation method, using the aforementioned three-dimensional oxygenation device, includes the following steps:

[0019] After constructing a dam around the water area to be treated, drain the water and allow the bottom sediment layer of the water area to dry until the surface of the bottom sediment layer changes from gray-black to gray-white, and transverse and longitudinal cracks appear on the surface of the bottom sediment layer.

[0020] The bottom mud layer is excavated to a certain depth, a loose layer is laid, and the excavated bottom mud is backfilled on the loose layer.

[0021] The water area to be treated is divided into multiple grids, and magnetization components are installed in the bottom sediment layer within each grid.

[0022] Lay a slow-release oxygen layer in the bottom sediment layer;

[0023] Water is added to moisten the slow-release oxygen layer, the bottom mud layer, and the loose layer, and planting substrate is laid in some locations to plant submerged plants in the planting substrate.

[0024] The water area to be treated was first filled with water to a depth of 20cm to 30cm, and benthic animals were introduced.

[0025] Plant emergent plants after the scheduled time;

[0026] The treated water area will undergo a second water impoundment, with a depth of 50cm to 80cm; after a predetermined time, the treated water area will undergo a third water impoundment, with the depth reaching the pre-discharge water level; and

[0027] Harvest parts of the stems and leaves of submerged and emergent plants regularly.

[0028] In some embodiments, the three-dimensional oxygenation method further includes at least one of the following features:

[0029] (1) The time for drying the bottom mud layer of the water to be treated is 30-40 days;

[0030] (2) The depth of the bottom mud layer to be removed is 8cm~15cm;

[0031] (3) The size of the grid is (1m~2m)×(1m~2m);

[0032] (4) The magnetizing component is inserted into the bottom mud layer to a depth of 40cm~50cm, and the top of the magnetizing component is 10cm~15cm higher than the water level before drainage;

[0033] (5) The thickness of the slow-release oxygen layer on the bottom sediment layer is 15cm~20cm;

[0034] (6) The planting density of the submerged plants is 8 plants / square meter to 24 plants / square meter;

[0035] (7) The thickness of the planting substrate is 10cm~15cm;

[0036] (8) The reservation period is 5 days to 7 days;

[0037] (9) The planting density of the emergent plants is 8 plants / square meter to 16 plants / square meter;

[0038] (10) The emergent plants are planted by cuttings, with a cutting depth of 5cm to 8cm.

[0039] The aforementioned three-dimensional oxygenation device ensures sufficient oxygen supply to both the upper layer of the water column and the surface layer of the sediment, achieving three-dimensional oxygenation. It exhibits significant oxygenation effects, a simple structure, and low cost. This application can simultaneously increase the dissolved oxygen content of lake water and sediment, overcoming the limitations of conventional treatment methods in increasing dissolved oxygen content and penetration depth in sediment. It breaks through the limitations of the diffusion boundary layer in traditional technologies, improves the exchange rate and penetration depth of dissolved oxygen between water and sediment, alters the anaerobic environment of the sediment, and promotes the degradation of sediment pollutants. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0042] Figure 1 This is a schematic diagram of a three-dimensional oxygenation device according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures

[0044] 10. Three-dimensional oxygenation device; 100. Loose layer; 200. Magnetized component; 300. Slow-release oxygen layer; 400. Planting substrate; 500. Submerged plants; 600. Emergent plants; 700. Benthic animals. Detailed Implementation

[0045] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0047] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0050] In this document, "optionally," "optionally," and "optional" mean that something is optional, that is, it is selected from either "with" or "without." If multiple "options" appear in a technical solution, unless otherwise specified and there are no contradictions or mutual constraints, each "option" is independent. In this application, descriptions such as "optionally contains" and "optionally includes" indicate "contains or does not contain."

[0051] In this application, when numerical intervals (i.e., numerical ranges) are mentioned, unless otherwise specified, the distribution of selectable numerical values ​​within the numerical interval is considered continuous, and includes the two endpoints of the numerical interval (i.e., the minimum and maximum values), as well as every numerical value between these two endpoints. Unless otherwise specified, when a numerical interval refers only to integers within that numerical interval, it includes the two endpoint integers of the numerical range, as well as every integer between the two endpoints, which is equivalent to directly listing every integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be merged. In other words, unless otherwise specified, the numerical ranges disclosed in this application should be understood to include any and all subranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, percentage, ratio, etc. The term "numerical interval" can be broadly included to include percentage intervals, ratio intervals, proportion intervals, etc.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] This application provides a three-dimensional aeration device to address the limitations of traditional biological methods using submerged plants and benthic animals, which, while providing long-lasting effects, require ensuring the survival and healthy growth of these plants and animals, thus limiting their applicability due to strict boundary conditions. It also addresses physicochemical methods such as aeration or oxygen nanobubbles modified mineral materials, which suffer from high energy consumption and short-lived effects. The three-dimensional aeration device will be described below with reference to the accompanying drawings.

[0054] The three-dimensional oxygenation device 10 provided in this application embodiment is exemplary; please refer to [link to example]. Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the three-dimensional oxygenation device 10 provided in an embodiment of this application. The three-dimensional oxygenation device 10 of this application can be used to increase dissolved oxygen in water.

[0055] To more clearly illustrate the structure of the three-dimensional oxygenation device 10, the three-dimensional oxygenation device 10 will be described below in conjunction with the accompanying drawings.

[0056] For example, please refer to Figure 1 As shown, a three-dimensional oxygenation device 10 includes a loose layer 100, a magnetized component 200, a slow-release oxygen layer 300, a planting substrate 400, submerged plants 500, emergent plants 600, and benthic animals 700. The loose layer 100 is laid on the surface of the bottom sediment layer of the water body to be treated. The magnetized component 200 is installed and fixed to the water body to be treated. The slow-release oxygen layer 300 is mixed into the bottom sediment of the water body to be treated. The planting substrate 400 is placed in the water body to be treated, and the submerged plants 500 are planted in the planting substrate 400.

[0057] The aforementioned three-dimensional oxygenation device 10 ensures sufficient oxygen supply to both the upper layer of the water column and the surface layer of the sediment, achieving three-dimensional oxygenation. It exhibits significant oxygenation effects, a simple structure, and low cost. This application can simultaneously increase the dissolved oxygen content of lake water and sediment, overcoming the limitations of conventional treatment methods in increasing dissolved oxygen content and penetration depth in sediment. It breaks through the limitations of the diffusion boundary layer in traditional technologies, improves the exchange rate and penetration depth of dissolved oxygen between water and sediment, alters the anaerobic environment of the sediment, and promotes the degradation of sediment pollutants.

[0058] In some embodiments, the thickness of the porous layer 100 is 1 cm to 2 cm. For example, the thickness of the porous layer 100 may be 1 cm, 1.5 cm, 2 cm, or any two of the above values.

[0059] In some embodiments, the loose layer 100 comprises 40wt%~50wt% coconut fiber clay, 20wt%~30wt% coconut fiber, and 20wt%~30wt% loofah sponge. In one specific example, the loose layer 100 comprises 50wt% coconut fiber clay, 30wt% coconut fiber, and 20wt% loofah sponge. In another specific example, the loose layer 100 comprises 40wt% coconut fiber clay, 30wt% coconut fiber, and 30wt% loofah sponge.

[0060] In some embodiments, the magnetizing component 200 includes multiple magnetizing rods. During installation, the bottom of each magnetizing rod is inserted 40-50 cm into the bottom sediment layer, and its top is 10-15 cm above the pre-drainage water level. The magnetizing rods in this application, with their tops above the pre-drainage water level and their bottoms inserted into the bottom sediment layer, ensure that the entire water body is magnetized by the magnetizing effect of the rods, thus improving the magnetization efficiency.

[0061] In some embodiments, the material of the slow-release oxygen layer 300 includes CaO2, kaolin, and cement, wherein the mass ratio of CaO2, kaolin, and cement is (2~3):1:1. For example, the mass ratio of CaO2, kaolin, and cement is 2:1:1; or, for another example, the mass ratio of CaO2, kaolin, and cement is 3:1:1.

[0062] In some embodiments, the planting substrate 400 comprises dried substrate, oxygen nanobubble modified particles, and maifanite, wherein the volume ratio of the dried substrate, oxygen nanobubble modified particles, and maifanite is (5~7):1:1. In one specific example, the volume ratio of the dried substrate, oxygen nanobubble modified particles, and maifanite is 5:1:1. In another specific example, the volume ratio of the dried substrate, oxygen nanobubble modified particles, and maifanite is 7:1:1.

[0063] In some embodiments, the submerged plant 500 includes Vallisneria natans. It is readily understood that the submerged plant 500 may also include other suitable plants.

[0064] In some embodiments, the planting density of the submerged plant 500 is 8 plants / m² to 24 plants / m². For example, the planting density of the submerged plant 500 may be 8 plants / m², 10 plants / m², 15 plants / m², 20 plants / m², 24 plants / m², or any two of the above values.

[0065] In some embodiments, the emergent plant 600 includes *Myriophyllum spicatum*, and the planting density of the emergent plant 600 is 8 plants / m² to 16 plants / m². For example, the planting density of the emergent plant 600 may be 8 plants / m², 10 plants / m², 12 plants / m², 14 plants / m², 16 plants / m², or any two of the above values.

[0066] In some embodiments, the benthic animal 700 includes chironomid larvae. In this application, the disturbance of benthic organisms can significantly increase the dissolved oxygen erosion depth of the surface sediment of the treated water body, such as a lake. Compared to an average dissolved oxygen erosion depth of approximately 4 mm without benthic disturbance, in this application, benthic organisms such as long-legged chironomid larvae can achieve a maximum dissolved oxygen erosion depth exceeding 8 mm, with an average erosion depth exceeding 6 mm. As "corridor builders," chironomid larvae construct numerous tubular burrows in the sediment. Through biological irrigation, oxygen from the overlying water enters the deeper sediment through these burrows, increasing the DO penetration depth in the sediment by at least 1.9 mm.

[0067] One embodiment of this application provides a three-dimensional oxygenation method.

[0068] In this document, unless otherwise stated, the reaction steps may be performed in the order described herein or not. For example, other steps may be included between reaction steps, and the order of reaction steps may be appropriately interchanged. This is something that those skilled in the art can determine based on conventional knowledge and experience. Preferably, the reaction methods described herein are performed sequentially.

[0069] A three-dimensional oxygenation method using the aforementioned three-dimensional oxygenation device 10, please refer to [link / reference]. Figure 1 As shown, it includes the following steps:

[0070] S1. After constructing a dam around the water area to be treated, drain the water and allow the bottom sediment layer of the water area to dry until the surface of the bottom sediment layer changes from gray-black to gray-white, and transverse and longitudinal cracks appear on the surface of the bottom sediment layer.

[0071] S2. Excavate the bottom mud layer to a certain depth, lay a loose layer 100, and backfill the excavated bottom mud on the loose layer 100.

[0072] S3. Divide the water area to be treated into multiple grids, and install magnetizing components 200 in the bottom sediment layer of each grid.

[0073] S4. Lay a slow-release oxygen layer of 300 mm in the bottom mud layer.

[0074] S5. Add water to moisten the slow-release oxygen layer 300, the bottom mud layer, and the loose layer 100, and lay the planting substrate 400 in some locations, and plant submerged plants 500 in the planting substrate 400.

[0075] S6. The water area to be treated is impounded for the first time, with a water depth of 20cm~30cm, and 700 benthic animals are released.

[0076] S7. After the scheduled time, plant 600 emergent plants.

[0077] S8. The water area to be treated is impounded for the second time, with a depth of 50cm to 80cm. After the scheduled time, the water area to be treated is impounded for the third time, with the depth of the third impoundment being the water level before drainage.

[0078] S9. Regularly harvest 500 parts of the stems and leaves of submerged plants and 600 parts of emergent plants.

[0079] In some embodiments, in step S1, the time for drying the bottom mud layer of the water to be treated is 30 days to 40 days.

[0080] In some embodiments, in step S2, the depth of the bottom mud layer is 8cm to 15cm.

[0081] In some embodiments, in step S3, the size of the grid is (1m~2m)×(1m~2m); preferably, the size of the grid is 1m×1m.

[0082] In some embodiments, in step S3, the magnetized component 200 is inserted into the bottom mud layer to a depth of 40cm to 50cm, and the top of the magnetized component 200 is 10cm to 15cm above the water level before drainage.

[0083] In some embodiments, in step S4, the thickness of the slow-release oxygen layer 300 laid on the bottom sediment layer is 15cm to 20cm.

[0084] In some embodiments, in step S5, the planting density of the submerged plant 500 is 8 plants / square meter to 24 plants / square meter.

[0085] In some embodiments, in step S5, the thickness of the planting substrate 400 is 10cm to 15cm;

[0086] In some embodiments, the predetermined time in step S7 is 5 days to 7 days.

[0087] In some embodiments, in step S7, the planting density of the emergent plants 600 is 8 plants / square meter to 16 plants / square meter.

[0088] In some embodiments, in step S7, the emergent plant 600 is planted by cuttings, with a cutting depth of 5cm to 8cm.

[0089] In some embodiments, the predetermined time in step S8 is 5 days to 7 days.

[0090] The solutions followed by this invention include the following: First, increasing the dissolved oxygen content in the overlying water to improve its oxygen retention capacity; second, improving the physicochemical properties of the sediment to enhance the permeation of dissolved oxygen from the overlying water into the sediment, with a focus on breaking down barriers to oxygen transport in the bottom diffusion boundary layer, altering the distribution pattern of dissolved oxygen in the bottom diffusion boundary layer, and increasing the oxygen exchange rate; third, promoting the growth of submerged plants 500, especially root development, while ensuring their survival, and using a combination of bottom-type and canopy-type submerged plants 500 to construct a community with strong oxygen release capacity, providing sufficient oxygen from the sediment to the overlying water.

[0091] Example 1

[0092] This embodiment provides a three-dimensional oxygenation method.

[0093] The three-dimensional oxygenation method in this embodiment uses the three-dimensional oxygenation device 10 described below. Please refer to... Figure 1 As shown, the system includes a loose layer 100, a magnetized component 200, a slow-release oxygen layer 300, a planting substrate 400, submerged plants 500, emergent plants 600, and benthic animals 700. The loose layer 100 is laid on the surface of the bottom sediment layer of the water to be treated. The magnetized component 200 is installed and fixed in the water to be treated. The slow-release oxygen layer 300 is mixed into the bottom sediment of the water to be treated. The planting substrate 400 is placed in the water to be treated, and the submerged plants 500 are planted in the planting substrate 400. The material of the loose layer 100 includes 40wt% coconut fiber soil, 30wt% coconut fiber, and 30wt% loofah sponge. The slow-release oxygen layer 300 includes CaO2, kaolin, and cement, wherein the mass ratio of CaO2, kaolin, and cement is 3:1:1. The planting substrate 400 includes dried bottom mud, oxygen nanobubble modified particles, and maifan stone, wherein the volume ratio of dried bottom mud, oxygen nanobubble modified particles, and maifan stone is 5:1:1.

[0094] A three-dimensional oxygenation method includes the following steps:

[0095] S1. The oxygen content of the water to be treated was tested, and the result was 1.0 mg / L.

[0096] After constructing a dam around the water area to be treated, drain the water and allow the bottom sediment layer to dry for 30 to 40 days until the surface of the bottom sediment layer changes from gray-black to gray-white, and transverse and longitudinal cracks appear on the surface of the bottom sediment layer.

[0097] S2. Excavate the bottom mud layer to a depth of 8cm to 15cm, lay the material of the loose layer 100 to form the loose layer 100, and backfill the excavated bottom mud on the loose layer 100.

[0098] S3. Divide the water area to be treated into multiple grids, each grid being 1m × 1m in size. Install magnetizing components 200 in the bottom sediment layer within each grid. The magnetizing components 200 are inserted into the bottom sediment layer to a depth of 50cm, and the top of the magnetizing components 200 is 15cm above the water level before drainage.

[0099] S4. Lay the slow-release oxygen layer 300 material on the bottom mud layer with a thickness of 20cm to form the slow-release oxygen layer 300.

[0100] S5. Add water to moisten the slow-release oxygen layer 300, the bottom mud layer, and the loose layer 100, and lay a planting substrate 400 with a thickness of 15cm in some places. Plant submerged plants 500 in the planting substrate 400, and the planting density of the submerged plants 500 is 24 plants / square meter.

[0101] S6. The water area to be treated is impounded for the first time, with a water depth of 30cm, and 700 benthic animals are released.

[0102] After 7 days, emergent plants 600 were planted using the cutting method, with a cutting depth of 8cm and a planting density of 16 plants / square meter.

[0103] S8. The water area to be treated is impounded for the second time, with a depth of 80cm. After 7 days, the water area to be treated is impounded for the third time, with the depth of impoundment being the water level before drainage.

[0104] S9. Harvest 500 parts of the stems and leaves of submerged plants and 600 parts of emergent plants every week.

[0105] The oxygen content of the water body treated with the three-dimensional aeration method was measured, and the result was 6 mg / L. The comparison shows that the oxygen content of the water body increased by 500% after the three-dimensional aeration method was implemented.

[0106] Example 2

[0107] This embodiment provides a three-dimensional oxygenation method.

[0108] The three-dimensional oxygenation method in this embodiment uses the three-dimensional oxygenation device 10 described below. Please refer to... Figure 1As shown, the system includes a loose layer 100, a magnetized component 200, a slow-release oxygen layer 300, a planting substrate 400, submerged plants 500, emergent plants 600, and benthic animals 700. The loose layer 100 is laid on the surface of the bottom sediment layer of the water to be treated. The magnetized component 200 is installed and fixed in the water to be treated. The slow-release oxygen layer 300 is mixed into the bottom sediment of the water to be treated. The planting substrate 400 is placed in the water to be treated, and the submerged plants 500 are planted in the planting substrate 400. The material of the loose layer 100 includes 50wt% coconut fiber soil, 20wt% coconut fiber, and 20wt% loofah sponge. The slow-release oxygen layer 300 includes CaO2, kaolin, and cement, wherein the mass ratio of CaO2, kaolin, and cement is 2:1:1. The planting substrate 400 includes dried bottom mud, oxygen nanobubble modified particles, and maifan stone, wherein the volume ratio of dried bottom mud, oxygen nanobubble modified particles, and maifan stone is 6:1:1.

[0109] A three-dimensional oxygenation method includes the following steps:

[0110] S1. The oxygen content of the water to be treated was tested, and the result was 0.5 mg / L.

[0111] After constructing a dam around the water area to be treated, drain the water and allow the bottom sediment layer of the water area to dry for 30 days until the surface of the bottom sediment layer changes from gray-black to gray-white, and transverse and longitudinal cracks appear on the surface of the bottom sediment layer.

[0112] S2. Remove the bottom mud layer to a depth of 8cm, lay the material of the loose layer 100 to form the loose layer 100, and backfill the removed bottom mud on the loose layer 100.

[0113] S3. Divide the water area to be treated into multiple grids, each grid being 1m × 1m in size. Install magnetizing components 200 in the bottom sediment layer within each grid. The magnetizing components 200 are inserted into the bottom sediment layer to a depth of 40cm, and the top of the magnetizing components 200 is 10cm above the water level before drainage.

[0114] S4. Lay the slow-release oxygen layer 300 material on the bottom mud layer with a thickness of 15cm to form the slow-release oxygen layer 300.

[0115] S5. Add water to moisten the slow-release oxygen layer 300, the bottom mud layer, and the loose layer 100, and lay a planting substrate 400 with a thickness of 10cm in some places. Plant submerged plants 500 in the planting substrate 400, with a planting density of 8 plants / square meter.

[0116] S6. The water area to be treated is impounded for the first time, with a water depth of 20cm, and 700 benthic animals are released.

[0117] After 5 days, emergent plants 600 were planted using the cutting method, with a cutting depth of 5cm and a planting density of 8 plants / square meter.

[0118] S8. The water area to be treated is impounded for the second time, with a depth of 50cm. After 5 days, the water area to be treated is impounded for the third time, with the depth of impoundment being the water level before drainage.

[0119] S9. Harvest 500 parts of the stems and leaves of submerged plants and 600 parts of emergent plants every week.

[0120] The oxygen content of the water body treated with the three-dimensional aeration method was measured, and the result was 5 mg / L. Comparison shows that the oxygen content of the water body increased by 900% after the three-dimensional aeration method was implemented.

[0121] Compared with traditional technologies, the present invention has the following technical effects:

[0122] (1) The use of water magnetization oxygenation technology not only improves the solubility of oxygen in water, but also prolongs the residence time of oxygen in water, and also increases the absorption rate of light by the water body. This is beneficial to promoting the growth of submerged plants such as Vallisneria natans and Myriophyllum spicatum, and helps to alleviate and improve the problem of insufficient dissolved oxygen in water.

[0123] (2) Instead of adding the slow-release oxygen layer 300 directly into the sediment, the slow-release oxygen layer 300 can directly contact the water when added to the surface. The alkaline substances in the slow-release oxygen layer 300 will quickly dissolve in the water, causing the pH value of the overlying water to increase rapidly. This treatment is not conducive to plant growth. However, the slow-release oxygen material added into the sediment mainly contacts the sediment. The sediment can buffer most of the alkaline substances, and the pH value does not change much. In addition, the slow-release oxygen layer 300 added into the sediment mainly contacts the sediment, which slows down the efficiency of oxygen production by reacting with water and prolongs the oxygen release cycle. Furthermore, adding a slow-release oxygen layer 300 to the bottom sediment layer is more effective in breaking down the limiting effect of the bottom diffusion boundary layer, and is more conducive to increasing the penetration depth of dissolved oxygen from the overlying water into the bottom sediment. It can be directly used to increase the dissolved oxygen content in the bottom sediment, while improving the physicochemical properties of the bottom sediment, which facilitates the downward development of plant roots. The loose layer 100 located on the slow-release oxygen layer 300 not only increases the porosity of the bottom sediment and improves aeration, but also makes the oxygen released by the slow-release oxygen layer 300 during the reaction process more evenly distributed, which helps the root system of submerged plants 500 grow and prevents root rot.

[0124] (3) Oxygen nanobubble modified particles and maifan stone were added to the planting substrate 400 of submerged plants such as Vallisneria natans. This was mainly to help submerged plants successfully overcome the harsh growth environment they faced in the early stage of root growth and development, and to protect the normal growth of the roots of submerged plants.

[0125] (4) In the oxygenation method of this application, water is stored in three stages to meet the transparency requirements of the water body for 500 submerged plants such as Vallisneria natans and 600 emergent plants such as Myriophyllum spicatum. The release of 700 benthic animals such as chironomid larvae also helps to increase the dissolved oxygen erosion depth of the bottom sediment layer and break the limitation of the bottom diffusion boundary layer. Plant harvesting is a strategy to improve the distribution of plant nutrients, so that more nutrients are distributed on the plant roots, promote the downward growth of plant roots, thereby expanding the distribution range of dissolved oxygen in the bottom sediment, increasing the dissolved oxygen content, and promoting the degradation of pollutants in the bottom sediment.

[0126] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0128] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A three-dimensional oxygenation device, characterized in that, The treatment includes a loose layer, a magnetized component, a slow-release oxygen layer, a planting substrate, submerged plants, emergent plants, and benthic animals. The loose layer is laid on the surface of the bottom sediment layer of the water to be treated. The material of the loose layer includes 40wt%~50wt% coconut fiber soil, 20wt%~30wt% coconut fiber, and 20wt%~30wt% loofah sponge. The magnetized component is installed and fixed in the water to be treated. The slow-release oxygen layer is mixed into the bottom sediment of the water to be treated. The planting substrate is placed in the water to be treated. The submerged plants are planted in the planting substrate.

2. The three-dimensional oxygenation device according to claim 1, characterized in that, The thickness of the loose layer is 1cm to 2cm.

3. The three-dimensional oxygenation device according to claim 1, characterized in that, The magnetization component includes multiple magnetization rods. When installed, the bottom of the magnetization rod is inserted into the bottom mud layer by 40cm to 50cm, and the top of the magnetization rod is 10cm to 15cm above the water level before drainage.

4. The three-dimensional oxygenation device according to any one of claims 1 to 3, characterized in that, The materials of the slow-release oxygen layer include CaO2, kaolin, and cement, wherein the mass ratio of CaO2, kaolin, and cement is (2~3):1:

1.

5. The three-dimensional oxygenation device according to any one of claims 1 to 3, characterized in that, The planting substrate includes dried bottom mud, oxygen nanobubble modified particles, and maifan stone, wherein the volume ratio of dried bottom mud, oxygen nanobubble modified particles, and maifan stone is (5~7):1:

1.

6. The three-dimensional oxygenation device according to any one of claims 1 to 3, characterized in that, The submerged plants include Vallisneria natans.

7. The three-dimensional oxygenation device according to any one of claims 1 to 3, characterized in that, The planting density of the submerged plants is 8 plants / square meter to 24 plants / square meter.

8. The three-dimensional oxygenation device according to any one of claims 1 to 3, characterized in that, The emergent plants include Myriophyllum spicatum, and the planting density of the emergent plants is 8 plants / square meter to 16 plants / square meter; And / or, the benthic animals include chironomid larvae.

9. A three-dimensional oxygenation method, characterized in that, Using the three-dimensional oxygenation device according to any one of claims 1 to 8 includes the following steps: After constructing a dam around the water area to be treated, drain the water and allow the bottom sediment layer of the water area to dry until the surface of the bottom sediment layer changes from gray-black to gray-white, and transverse and longitudinal cracks appear on the surface of the bottom sediment layer. The bottom mud layer is excavated to a certain depth, and a loose layer is laid. The loose layer consists of 40wt%~50wt% coconut fiber soil, 20wt%~30wt% coconut fiber and 20wt%~30wt% loofah sponge. The excavated bottom mud is then backfilled on the loose layer. The water area to be treated is divided into multiple grids, and magnetization components are installed in the bottom sediment layer within each grid. Lay a slow-release oxygen layer in the bottom sediment layer; Water is added to moisten the slow-release oxygen layer, the bottom mud layer, and the loose layer, and planting substrate is laid in some locations to plant submerged plants in the planting substrate. The water area to be treated was first filled with water to a depth of 20cm to 30cm, and benthic animals were introduced. Plant emergent plants after the scheduled time; The treated water area will undergo a second water impoundment, with a depth of 50cm to 80cm; after a predetermined time, the treated water area will undergo a third water impoundment, with the depth reaching the pre-discharge water level; and Harvest parts of the stems and leaves of submerged and emergent plants regularly.

10. The three-dimensional oxygenation method according to claim 9, characterized in that, The three-dimensional oxygenation method further includes at least one of the following features: (1) The time for drying the bottom mud layer of the water to be treated is 30-40 days; (2) The depth of the bottom mud layer to be removed is 8cm~15cm; (3) The size of the grid is (1m~2m)×(1m~2m); (4) The magnetizing component is inserted into the bottom mud layer to a depth of 40cm~50cm, and the top of the magnetizing component is 10cm~15cm higher than the water level before drainage; (5) The thickness of the slow-release oxygen layer on the bottom sediment layer is 15cm~20cm; (6) The planting density of the submerged plants is 8 plants / square meter to 24 plants / square meter; (7) The thickness of the planting substrate is 10cm~15cm; (8) The reservation period is 5 days to 7 days; (9) The planting density of the emergent plants is 8 plants / square meter to 16 plants / square meter; (10) The emergent plants are planted by cuttings, with a cutting depth of 5cm to 8cm.

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