A kind of ecological reduction pond system of domestic pollutants and construction method thereof

Abstract

The present invention belongs to the technical field of water body management, and specifically relates to an ecological reduction pond system for domestic pollutants and a construction method thereof, the ecological reduction pond system for domestic pollutants comprising a pond body, wherein a buffer zone and a deep water zone are arranged inside the pond body, wherein a water inlet is arranged inside the buffer zone, wherein a drainage gate assembly is arranged inside the deep water zone, and further comprising: a sand clearing mechanism, wherein the sand clearing mechanism comprises a protective grille and a plurality of footings, wherein the protective grille is fixed inside the buffer zone, and the plurality of footings are evenly fixed to the lower end of the protective grille. The present invention constructs a buffer zone and a deep water zone inside the pond body, and utilizes the buffer zone and the emergent plants therein to remove silt and flocculants in sewage, while the deep water zone and its plant forest reduce dissolved pollutants. The deep water zone also provides emergency drainage and flood discharge functions, enhances the ecological purification capacity of the pond body, and expands the storage space and flood management capacity.

Description

Technical Field

[0001] The invention belongs to the technical field of water body treatment, and specifically relates to an ecological reduction pond system for domestic pollutants and a construction method thereof. Background Art

[0002] With the acceleration of urbanization and the continuous growth of population, the discharge of domestic sewage has increased sharply, causing great pressure on natural water bodies and the ecological environment. Although traditional sewage treatment methods, such as activated sludge method and biofilm method, can treat organic matter, nitrogen, phosphorus and other pollutants in sewage to a certain extent, these methods often have problems such as high energy consumption, large land occupation, high operating costs, and limited removal effect on some difficult-to-degrade organic matter and nutrients. Therefore, it is particularly important to explore efficient, low-cost and eco-friendly domestic sewage treatment methods.

[0003] As an artificial wetland that simulates the functions of natural ecosystems, the ecological mitigation pond system removes pollutants from sewage through the combined action of plants, microorganisms and substrates. Compared with traditional sewage treatment technologies, the ecological mitigation pond system has the advantages of low investment, low operating costs, simple maintenance and significant ecological benefits. However, the existing ecological mitigation pond system still has certain limitations in terms of treatment efficiency, landscape effects and flood storage capacity.

[0004] In order to improve the pollutant reduction capacity of the ecological reduction pond system, it is necessary to design a system that can provide a diverse habitat to support the growth of more types of microorganisms and plants, thereby enhancing the system's self-purification ability and ecological stability. At the same time, increasing the system's storage space can improve its flood storage capacity and reduce the impact of extreme weather events on the surrounding environment. In addition, improving landscape quality is also an important part of the design of modern ecological reduction pond systems. It can not only improve the urban environment, but also improve the quality of life of residents. Summary of the invention

[0005] The purpose of the present invention is to provide an ecological reduction pond system for domestic pollutants, which constructs a buffer zone and a deep water zone inside the pond body, uses the buffer zone and the emergent plants therein to remove silt and flocculants in sewage, and at the same time the deep water zone and its plant forest reduce dissolved pollutants. The deep water zone also provides emergency drainage and flood discharge functions, enhances the ecological purification capacity of the pond body, and expands the storage space and flood management capacity.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A domestic pollutant ecological reduction pond system includes a pond body, a buffer zone and a deep water zone are arranged inside the pond body, a water inlet is arranged inside the buffer zone, a drainage gate assembly is arranged inside the deep water zone, and further includes:

[0008] A sand clearing mechanism, the sand clearing mechanism comprising a protective grille and a plurality of footings, the protective grille being fixed inside the buffer zone, a plurality of footings being evenly fixed to the lower end of the protective grille, and the protective grille and the buffer zone being fixedly connected via the footings;

[0009] The interior of the buffer zone is densely planted with emergent plants, the maximum water storage capacity of the deep water zone is recorded as P1, the monthly water inflow of the pond body is recorded as P2, and P1≥5P2.

[0010] In a preferred embodiment, the width of the water inlet is recorded as L1, the width of the buffer zone is recorded as L2, the length of the buffer zone is recorded as L3, L2≥10L1, L3≥15L1.

[0011] In a preferred embodiment, a plurality of deep water trenches are arranged inside the deep water area, and the extension direction of the deep water trenches and the water inlet direction of the water inlet are perpendicular to each other.

[0012] In a preferred embodiment, the area of ​​the deep water zone is denoted as S1, the sum of the areas of the plurality of deep water ditches is denoted as S2, and 0.1S1≤S2≤0.2S1.

[0013] In a preferred embodiment, a plant forest is constructed inside the deep water area, and the plant forest includes emergent plants, floating plants and submerged plants, and aquatic animals are placed inside the deep water area.

[0014] In a preferred embodiment, a grille, a monitoring component and an early warning component are arranged inside the water inlet, and a plurality of liquid level monitoring components are arranged inside the pond body.

[0015] In a preferred embodiment, a shallow area is arranged inside the deep water area, and submerged plants are planted inside the shallow area.

[0016] A method for constructing a domestic pollutant ecological reduction pond system is applicable to any of the domestic pollutant ecological reduction pond systems described above, comprising the following steps:

[0017] S1: construct the pond body to form the buffer zone, deep water zone and shallow beach zone inside, and fix the protective grille inside the buffer zone;

[0018] S2: digging a deep ditch inside the deep water area, and the extension direction of the deep ditch is perpendicular to the water inlet direction of the water inlet;

[0019] S3: Explore the geological conditions inside the pond and select suitable emergent plants, floating plants, submerged plants and ornamental aquatic plants for planting;

[0020] S4: multiple liquid level monitoring components are set up inside the pond body;

[0021] S5: A water inlet and a drainage gate assembly are respectively opened inside the buffer zone and the deep water zone, and a grille, a monitoring assembly and an early warning assembly are set up inside the water inlet.

[0022] The technical effects achieved by the present invention are:

[0023] The present invention constructs a buffer zone and a deep water zone inside the pond body, and precipitates and absorbs silt and flocculants in domestic sewage through the buffer zone and the emergent plants planted therein, and reduces dissolved pollutants in domestic sewage through the deep water zone and the plant forest constructed therein. At the same time, the deep water zone also has emergency drainage and flood discharge functions, so that the pond body can not only provide diversified habitats and enhance the ecological pollutant reduction function of the system, but also increase the storage space and flood storage capacity;

[0024] The present invention fixes the protective grille on the soil inside the buffer zone through a plurality of footings, and the soil within the buffer zone can be protected by the protective grille, so as to prevent the flow potential energy of domestic sewage from causing water and soil loss within the buffer zone after the domestic sewage is discharged into the pond body.

[0025] The present invention can collect silt and flocculants in domestic sewage through the cooperation of the first sedimentation chamber and the second sedimentation chamber. After starting the circulating water pump module, multiple first sedimentation chambers, multiple second sedimentation chambers and multiple partitions form a closed flushing cavity, and the silt and flocculants are driven by the cleaning medium to flow to the filter unit for collection, so that the silt and flocculants settled in the buffer zone can be efficiently cleaned, which is beneficial to ensuring the stability of the ecological abatement pond system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the pond body in the first embodiment of the present invention;

[0027] Figure 2 is a structural cross-sectional view of a pond body in Embodiment 1 of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the sand cleaning mechanism in the first embodiment of the present invention;

[0029] Figure 4 It is a bottom view of the structure of the sand cleaning mechanism in the first embodiment of the present invention;

[0030] Figure 5 is a partial structural cross-sectional view of the protective grille in the first embodiment of the present invention;

[0031] Figure 6is a partial structural cross-sectional view of the partition plate in the tooling state in the first embodiment of the present invention;

[0032] Figure 7 It is a structural schematic diagram of the pond body in the second embodiment of the present invention.

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 10. Pond body; 11. Buffer zone; 12. Deep water zone; 13. Water inlet; 14. Drainage gate assembly; 15. Deep ditch; 16. Shallow area; 20. Sand clearing mechanism; 21. Protective grille; 22. Anchor; 23. First sedimentation chamber; 24. Second sedimentation chamber; 25. Hollow planting grid; 26. Partition plate; 27. Diversion inlet; 28. Diversion outlet. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0038] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0039] Embodiment 1

[0040] Please refer to the attached Figure 1 and Figure 4As shown, it is the first embodiment of the present invention, which provides an ecological pond system for reducing domestic pollutants, including a pond body 10, wherein a buffer zone 11 and a deep water zone 12 are arranged inside the pond body 10, and the buffer zone 11 and the deep water zone 12 are interconnected, a water inlet 13 is arranged inside the buffer zone 11, and a drain gate assembly 14 is arranged inside the deep water zone 12, and the water inlet 13 and the drain gate assembly 14 are far away from each other, and further comprising:

[0041] The sand clearing mechanism 20 includes a protective grille 21 and a plurality of footings 22. The protective grille 21 is fixed to the upper end of the soil inside the buffer zone 11. The plurality of footings 22 are evenly fixed to the lower end of the protective grille 21. The protective grille 21 and the buffer zone 11 are fixedly connected by being plugged into the buffer zone 11 through the footings 22.

[0042] Among them, the interior of the buffer zone 11 and the interior of the protective grille 21 are densely planted with emergent plants, the maximum water storage capacity of the deep water area 12 is recorded as P1, and the monthly water inflow of the pond body 10 is recorded as P2, P1≥5P2.

[0043] Here, a circulating water pump module is used in conjunction with the sand cleaning mechanism 20. A filter unit is arranged inside the circulating water pump module. The circulating water pump module can transport a cleaning medium to the inside of the protective grille 21. The cleaning medium can drive the mud and flocculants deposited inside the protective grille 21 to flow to the filter unit for collection. In this embodiment, the cleaning medium is preferably water.

[0044] Furthermore, in this embodiment, the monthly water inflow of the pond body 10 can be obtained in the following manner: count the number of all permanent residents, calculate the domestic water consumption based on the number of residents, per capita water consumption and the number of days per month, and then calculate the monthly discharge of domestic sewage (i.e., the monthly water inflow of the pond body 10) based on the drainage coefficient and the domestic water consumption.

[0045] It should be noted that, in this embodiment, the water depth of the buffer zone 11 is less than 60 cm at normal water level, not less than 10 cm at low water level, and greater than 100 cm for no more than 7 days at high water level; the average water depth of the deep water zone 12 is 2 m at normal water level.

[0046] In this embodiment, domestic sewage is drained into the interior of the pond body 10 through the water inlet 13, and energy dissipation and buffering of the domestic sewage are performed through the buffer zone 11 and the stems of the densely planted emergent plants in the buffer zone 11, thereby reducing the flow potential energy of the domestic sewage, so that the silt and flocculants in the domestic sewage are precipitated into the protective grille 21. Since P1≥5P2, emergency drainage and emergency water storage can be performed through the deep water area 12 during the rainy season or rainstorm season, thereby increasing the storage space and flood storage capacity, so that the pond body 10 has the ability to prevent and discharge floods. At the same time, when it is necessary to collect the silt and flocculants deposited inside the protective grille 21, the circulation pump module is started so that the cleaning medium drives the silt and flocculants deposited inside the protective grille 21 to flow to the filter unit for collection.

[0047] In a specific embodiment, if the total number of permanent residents is 300, the daily per capita water consumption is 0.15 tons, and the emission coefficient is 0.8, then the monthly domestic water consumption is: 300*0.15*30=1350 tons, and the monthly domestic sewage discharge is obtained by calculation: 1350*0.8=1080 tons (i.e., the monthly water intake of the pond body 10). Of course, the specific per capita water consumption, domestic water consumption and emission coefficient will vary depending on factors such as region, climate, and living habits. The specific values ​​can be adjusted according to actual conditions and do not constitute a specific limitation here.

[0048] In a preferred embodiment, the width of the water inlet 13 is recorded as L1, the width of the buffer zone 11 is recorded as L2, the length of the buffer zone 11 is recorded as L3, L2≥10L1, L3≥15L1.

[0049] In this embodiment, through the above-mentioned arrangement, the area of ​​the buffer zone 11 is sufficient to dissipate and buffer the inflowing domestic sewage, thereby preventing the flow potential energy of the domestic sewage from bringing impurities such as silt and flocculants into the deep water area 12. At the same time, it is also convenient for people to clean up the silt deposited in the buffer zone 11 to ensure the long-term and stable operation of the ecological abatement pond system.

[0050] In a preferred embodiment, a plurality of deep water trenches 15 are disposed inside the deep water area 12 , and the extending direction of the deep water trenches 15 and the water inlet direction of the water inlet 13 are perpendicular to each other.

[0051] Furthermore, the area of ​​the deep water zone 12 is recorded as S1, and the sum of the areas of the plurality of deep water trenches 15 is recorded as S2, 0.1S1≤S2≤0.2S1.

[0052] In this embodiment, the provision of the deep ditch 15 can not only increase the water storage capacity of the pond body 10, but also increase the fluidity of the water body, improve the water quality, and enhance the self-purification ability. Specifically, the deep ditch 15 can promote the flow of water, increase the dissolved oxygen content, and provide a good living environment for microorganisms in the water body. The ecological environment of the pond body 10 is improved through microorganisms. At the same time, the provision of the deep ditch 15 is also conducive to the wintering of aquatic animals.

[0053] In a preferred embodiment, a plant forest is constructed inside the deep water area 12 , and the plant forest includes emergent plants, floating plants, and submerged plants, and aquatic animals are placed inside the deep water area 12 .

[0054] Here, the emergent plants may be one or more of the following plants: reed, lotus or other emergent plants adapted to the local environment; the floating plants may be one or more of the following plants: water chestnut, water lily or other floating plants adapted to the local environment; the submerged plants may be one or more of the following plants: willow leaf algae, duckweed or other submerged plants adapted to the local environment; the aquatic animals may be one or more of the following animals: fish, shrimp or other aquatic species that can adapt to the local environment.

[0055] In this embodiment, by constructing a plant forest and releasing aquatic animals inside the deep water area 12, the dilution, underwater plant forest, aquaculture and other technologies are comprehensively utilized to efficiently reduce dissolved pollutants (such as nitrogen, phosphorus, COD, BOD, etc.), and construct a comprehensive functional area integrating consumption, reduction, breeding and leisure.

[0056] In a preferred embodiment, a grille, a monitoring component and an early warning component are disposed inside the water inlet 13 , and a plurality of liquid level monitoring components are disposed inside the pond body 10 .

[0057] It should be noted that a server is used in conjunction with the monitoring component. The monitoring component and the server are connected, and the relevant information collected by the monitoring component can be obtained through the server.

[0058] In this embodiment, the setting of the grille can filter floating debris (such as branches, weeds, plastic bags, etc.) and sinking debris (such as stones, metal waste, etc.) in domestic sewage. At the same time, the blockage condition inside the water inlet 13 can be monitored through the monitoring component so that the water inlet 13 can be cleaned in time when it is blocked.

[0059] See also Figures 3 to 6As shown, a plurality of first sedimentation chambers 23 are provided inside the protective grille 21, a plurality of second sedimentation chambers 24 are obliquely provided between two adjacent first sedimentation chambers 23, the adjacent first sedimentation chambers 23 and the second sedimentation chambers 24 are interconnected, and hollow planting grids 25 are formed between the adjacent first sedimentation chambers 23 and the second sedimentation chambers 24, and the emergent plants planted inside the buffer zone 11 are adapted to the hollow planting grids 25, a plurality of partition plates 26 are rotatably connected inside the first sedimentation chambers 23 and the second sedimentation chambers 24, a diversion inlet 27 and a diversion outlet 28 are respectively provided at both ends of the first sedimentation chamber 23, and when in working state, the plurality of hollow planting grids 25 are all in a suspended state and are connected in sequence, and the plurality of first sedimentation chambers 23, the plurality of second sedimentation chambers 24 and the plurality of hollow planting grids 25 together form a closed flushing cavity.

[0060] Here, the cross-sectional shapes of the first sedimentation chamber 23 and the second sedimentation chamber 24 are both U-shaped. In the initial state, the semi-open first sedimentation chamber 23 and the second sedimentation chamber 24 can both settle and collect silt and flocculants, and the extension direction of the partition plate 26 and the horizontal plane are perpendicular to each other.

[0061] Furthermore, after the protective grille 21 is fixed inside the buffer zone 11 by means of the footing 22 , the emergent plants within the buffer zone 11 are planted inside the hollow planting grid 25 .

[0062] It should be noted that water inlet pipes (not shown in the figure) are fixed inside the multiple diversion inlets 27, and the multiple water inlet pipes and the output end of the circulating water pump module are connected via a diversion element (such as a diversion joint, a diversion valve, etc.). Water outlet pipes (not shown in the figure) are fixed inside the multiple diversion outlets 28, and the multiple water outlet pipes and the input end of the circulating water pump module are connected via a collecting element (such as a collecting valve, etc.). Specifically, in order to improve the cleaning efficiency of the sediment and flocculants at the upper end of the buffer zone 11, after the water inlet pipe, the diversion element, the water outlet pipe and the collecting element are connected, the diversion element and the collecting element are left on the shore so that they can be directly connected to the water pump module later.

[0063] In this embodiment, the protective grille 21 is fixed to the upper end of the soil inside the buffer zone 11 by the cooperation of multiple feet 22, and the soil within the buffer zone 11 is protected by the protective grille 21 to prevent the flow potential energy of domestic sewage from causing soil erosion within the buffer zone 11 after the domestic sewage is discharged into the pond body 10. At the same time, the buffer zone 11 and the emergent plants dissipate energy, so that the silt and flocculants are settled into the first sedimentation chamber 23 and the second sedimentation chamber 24 (part of the silt and flocculants will settle into the hollow planting grid 25). When it is necessary to clean the silt and flocculants inside the protective grille 21, the flow dividing element is connected to the output end of the circulating water pump module, the flow collecting element is connected to the input end of the circulating water pump module, the circulating water pump module is started, and the cleaning medium is transported to the inside of the water inlet pipe through the circulating water pump module. After the cleaning medium flows into the inside of the protective grille 21 through the guide inlet 27, it will impact the partition plates 26 in the initial state, so that the multiple partition plates 26 rotate from the initial state to the working state one by one (at this time, the partition plates 26 are in a suspended state, and their form can be referred to Figure 6 As shown), after the multiple partition plates 26 are rotated to the working state, the multiple first sedimentation chambers 23, the multiple second sedimentation chambers 24 and the multiple partition plates 26 jointly form a closed flushing cavity. The silt and flocculants inside the first sedimentation chamber 23 and the second sedimentation chamber 24, under the action of the cleaning medium, flow through the diversion outlet 28, the outlet pipe and the inside of the collecting element to the inside of the filter unit for collection, thereby achieving the purpose of cleaning the silt and flocculants within the buffer zone 11, which is beneficial to ensuring the stability of the ecological abatement pond system. After the circulating water pump module is turned off, the cleaning medium stops flowing, and the multiple partition plates 26 are reset to the initial state from the working state under the action of gravity, so that the silt and flocculants in the domestic sewage can be precipitated and collected again through the first sedimentation chamber 23 and the second sedimentation chamber 24.

[0064] Embodiment 2

[0065] This embodiment is based on the buffer zone 11 and the deep water zone 12 in the first embodiment, and the pond body 10 has a surplus space inside, and further optimization is performed, specifically:

[0066] See also Figure 7 As shown, a shallow area 16 is arranged inside the deep water area 12, and ornamental aquatic plants are planted inside the shallow area 16.

[0067] Here, the ornamental aquatic plants may be one or more of the following plants: Victoria amazonica, Pike weed or other ornamental aquatic plants adapted to the local environment.

[0068] It should be noted that, in this embodiment, the average water depth of the shallow area 16 is less than 40 cm at normal water level, and the average water depth is greater than 1 m for less than 15 days in the deep ditch at high water level, and the bottom is relatively flat with small fluctuations.

[0069] In a specific embodiment, the shallow area 16 can be arranged around the deep water area 12 to buffer the rainwater collected around the pond body 10 .

[0070] In another specific embodiment, the shallow area 16 can be set up in the deep water area 12 in the form of an artificial island to serve as a leisure area to improve the landscape effect.

[0071] In this embodiment, the provision of the shallow area 16 can facilitate the cleaning and transportation of the bottom mud inside the deep water area 12 .

[0072] Embodiment 3

[0073] A method for constructing a domestic pollutant ecological reduction pond system, applicable to a domestic pollutant ecological reduction pond system in any one of Embodiment 1 and Embodiment 2, comprises the following steps:

[0074] S1: construct the pond body 10 to form a buffer zone 11, a deep water zone 12 and a shallow beach zone 16 inside the pond, and fix the protective grille 21 to the upper end of the soil inside the buffer zone 11;

[0075] S2: digging a deep water ditch 15 inside the deep water area 12, and the extension direction of the deep water ditch 15 is perpendicular to the water inlet direction of the water inlet 13;

[0076] S3: Exploring the geological conditions inside the pond body 10, and selecting suitable emergent plants, floating plants, submerged plants and ornamental aquatic plants for planting;

[0077] S4: multiple liquid level monitoring components are set up inside the pond body 10, and the liquid levels of the buffer area 11 and the deep water area 12 are monitored by the liquid level monitoring components;

[0078] S5: A water inlet 13 and a drainage gate assembly 14 are respectively opened inside the buffer zone 11 and the deep water zone 12 , and a grille, a monitoring assembly and an early warning assembly are set up inside the water inlet 13 .

[0079] The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the art unless otherwise specified and limited.

Claims

1. A system for ecological reduction of domestic pollutants, characterized by: The invention comprises a pond body (10), wherein a buffer zone (11) and a deep water zone (12) are arranged inside the pond body (10), a water inlet (13) is arranged inside the buffer zone (11), and a drainage gate assembly (14) is arranged inside the deep water zone (12), and further comprises: A sand clearing mechanism (20), the sand clearing mechanism (20) comprising a protective grille (21) and a plurality of footings (22), the protective grille (21) being fixed inside a buffer zone (11), the plurality of footings (22) being evenly fixed to the lower end of the protective grille (21), and the protective grille (21) and the buffer zone (11) being fixedly connected via the footings (22), a plurality of first sedimentation chambers (23) being provided inside the protective grille (21), a plurality of second sedimentation chambers (24) being obliquely provided between two adjacent first sedimentation chambers (23), the adjacent first sedimentation chambers (23) and the second sedimentation chambers (24) being interconnected, and the adjacent first sedimentation chambers (23) and the second sedimentation chambers (24) being connected to each other. A hollow planting grid (25) is formed between the first and second sedimentation chambers (23) and the second sedimentation chamber (24), and the emergent plants planted inside the buffer zone (11) are adapted to the hollow planting grid (25). The first sedimentation chamber (23) and the second sedimentation chamber (24) are both rotatably connected with a plurality of partition plates (26). The first sedimentation chamber (23) is provided with a diversion inlet (27) and a diversion outlet (28) at both ends. When in working state, the plurality of hollow planting grids (25) are all in a suspended state and connected in sequence. The plurality of first sedimentation chambers (23), the plurality of second sedimentation chambers (24) and the plurality of hollow planting grids (25) together form a closed flushing channel. The buffer zone (11) is densely planted with emergent plants, the maximum water storage capacity of the deep water zone (12) is recorded as P1, the monthly water inflow of the pond body (10) is recorded as P2, and P1≥5P2.

2. The ecological reduction pond system for domestic pollutants according to claim 1 is characterized by: The width of the water inlet (13) is recorded as L1, the width of the buffer zone (11) is recorded as L2, and the length of the buffer zone (11) is recorded as L3, where L2≥10L1 and L3≥15L1.

3. The ecological reduction pond system for domestic pollutants according to claim 1 is characterized by: A plurality of deep water trenches (15) are arranged inside the deep water area (12), and the extension direction of the deep water trenches (15) and the water inlet direction of the water inlet (13) are perpendicular to each other.

4. The ecological reduction pond system for domestic pollutants according to claim 3 is characterized by: The area of ​​the deep water zone (12) is denoted as S1, and the sum of the areas of the plurality of deep water trenches (15) is denoted as S2, 0.1S1≤S2≤0.2S1.

5. The ecological reduction pond system for domestic pollutants according to claim 1 is characterized by: A plant forest is constructed inside the deep water area (12), and the plant forest includes emergent plants, floating plants and submerged plants, and aquatic animals are placed inside the deep water area (12).

6. The ecological reduction pond system for domestic pollutants according to claim 1 is characterized by: The water inlet (13) is provided with a grille, a monitoring component and an early warning component, and the pond body (10) is provided with a plurality of liquid level monitoring components.

7. The ecological reduction pond system for domestic pollutants according to claim 1 is characterized by: A shallow area (16) is arranged inside the deep water area (12), and submerged plants are planted inside the shallow area (16).

8. A method for constructing a domestic pollutant ecological reduction pond system, applicable to a domestic pollutant ecological reduction pond system according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: constructing a pond body (10) to form the buffer zone (11), the deep water zone (12) and the shallow water zone (16) inside the pond, and fixing the protective grille (21) inside the buffer zone (11); S2: digging a deep water ditch (15) inside the deep water area (12), wherein the extension direction of the deep water ditch (15) is perpendicular to the water inlet direction of the water inlet (13); S3: Exploring the geological conditions inside the pond body (10), and selecting suitable emergent plants, floating plants, submerged plants and ornamental aquatic plants for planting; S4: installing a plurality of liquid level monitoring components inside the pond body (10); S5: A water inlet (13) and a drainage gate assembly (14) are respectively opened inside the buffer zone (11) and the deep water zone (12), and a grille, a monitoring assembly and an early warning assembly are set up inside the water inlet (13).

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