Lake water environment pollution treatment system

Abstract

The utility model provides a lake water environment pollution abatement system which comprises a pretreatment unit arranged at a rainwater discharge port, the pretreatment unit is a continuous three-grid type tank body and sequentially comprises a sedimentation tank, a filter tank and an aeration tank, the tank bottoms of the filter tank and the aeration tank are communicated through a sewage discharge steel tank and provided with a stainless steel cover plate, and the sewage discharge steel tank is communicated with the sedimentation tank. A sewage pump is arranged at the bottom of the sedimentation tank; the biological coupling unit comprises two layers of stainless steel module purification frames, the upper layer is provided with a filter material ecological module, the middle layer is provided with a grid type frame body, particle ecological filter materials are filled in the grid type frame body, and submerged plants are planted on the bottom layer; the intelligent monitoring unit comprises water quality on-line monitoring devices and a liquid level sensor, and the water quality on-line monitoring devices are arranged at the water outlet end of the aeration tank and a lake body key node. A stable lake ecological system is constructed, the ecological self-purification capacity of the lake is restored, and COD, TN and TP in the water body are removed. Through continuous water quality monitoring and regular ecological water replenishing, the lake water quality stably reaches the earth surface III-IV water quality for a long time.

Description

Technical Field

[0001] This utility model relates to the field of water environment pollution control technology, and in particular to a lake water environment pollution control system. Background Technology

[0002] Lakes suffer from poor water flow, insufficient biodiversity, incomplete ecosystems, and limited self-purification capacity. While urban sewage interception and collection systems and outfall renovations have largely eliminated direct sewage discharge, cross-connections and misconnections still exist in the drainage network. Initial rainwater, surface runoff, and stormwater overflows easily pollute the water, leading to blackening and foul odors. To address this, some lakes have implemented integrated wastewater treatment facilities and water purification agents to control pollution and protect water quality. However, constructing integrated wastewater treatment facilities requires land, incurs significant construction costs, and requires annual operation and maintenance expenses; adding water purification agents may negatively impact the aquatic environment and generate large amounts of sediment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a lake water environment pollution control system that can reduce pollutants entering the lake, adsorb and degrade water pollutants, restore the lake ecosystem, increase the lake's self-purification capacity, and maintain stable and good lake water quality.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lake water pollution control system includes:

[0006] The pretreatment unit is located at the rainwater outlet. The pretreatment unit is a continuous three-chamber tank, which includes a sedimentation tank, a filtration tank and an aeration tank in sequence. The bottoms of the filtration tank and the aeration tank are connected by a sewage discharge steel trough and are covered with stainless steel plates. A sewage pump is installed at the bottom of the sedimentation tank.

[0007] The bio-coupling unit includes two layers of stainless steel module purification racks. The upper layer is equipped with filter media ecological modules, the middle layer is equipped with a mesh frame filled with granular ecological filter media, and the bottom layer is planted with submerged plants. It is arranged around the lake.

[0008] The intelligent monitoring unit includes an online water quality monitoring device and a liquid level sensor. The online water quality monitoring device is located at the outlet of the aeration tank and key nodes of the lake.

[0009] Furthermore, an overflow wall is provided between the sedimentation tank and the filtration tank. The height of the overflow wall is 2 / 3 of the height of the sedimentation tank, and the effluent enters the filtration tank through the overflow.

[0010] Furthermore, the filtration pool adopts a gravity flow filtration method with top inlet and bottom outlet. The filter media includes a sponge layer, a coconut fiber layer, an activated carbon layer, and an ecological filter media layer with thicknesses of 15cm, 10cm, 20cm, and 30cm, respectively.

[0011] Furthermore, the bottom of the aeration tank is evenly distributed with microporous aeration rods, with a spacing of 30cm×30cm between the aeration rods, and a dissolved oxygen probe is set up to be linked with the aeration controller.

[0012] Furthermore, the purification rack of the bio-coupling unit is equipped with six support columns, with adjacent purification racks spaced 1m apart.

[0013] Furthermore, the ecological filter material is a porous silica-alumina crystal compound with a particle size of 3-5 mm, a specific surface area of ​​≥800 m² / g, and an internal pore size distribution of 0.1-50 μm.

[0014] Furthermore, the filter media ecological module is a cubic structure with a side length of 50cm, and its interior is filled with a mixed matrix, including peat soil, perlite and humus, in a volume ratio of 3:1:1.

[0015] Furthermore, the online water quality monitoring device includes a COD sensor, an ammonia nitrogen sensor, a total phosphorus sensor, and a dissolved oxygen sensor, and the monitoring data is transmitted to the cloud platform in real time via a GPRS module.

[0016] Furthermore, a level gauge is installed at the inlet of the sedimentation tank, which is linked to the sewage pump for control. The sewage pump is activated when the level exceeds a set threshold.

[0017] Furthermore, phytoplankton are arranged between the biological coupling units.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By combining pretreatment, bio-coupling units, and intelligent monitoring units, the pretreatment system effectively reduces the content of external pollutants entering the lake during the rainy season. The bio-coupling unit effectively utilizes ecological filter media to adsorb pollutants in the water; simultaneously, it provides a carrier for indigenous microorganisms, forming a microbial film that enhances the biodegradation of pollutants in the water, significantly reducing pollutant levels; it does not produce sludge deposition; and it is easy to install, maintain, and replace; it constructs a stable lake ecosystem, restores the lake's ecological self-purification capacity, and removes COD, TN, and TP from the water. Through continuous water quality monitoring and regular ecological water replenishment, the lake's water quality can be maintained at a long-term stable level of Class III-IV surface water quality. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1This is a schematic diagram of the lakeside layout according to an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the preprocessing unit in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the bio-coupling unit structure in an embodiment of the present invention.

[0024] In the above attached figures: pretreatment unit 1, sedimentation tank 11, filtration tank 12, aeration tank 13, sewage discharge steel trough 14, sewage pump 15, overflow wall 16, aeration rod 17, level gauge 18, biological coupling unit 2, purification rack 21, filter media ecological module 22, grid frame 23, online water quality monitoring device 3, phytoplankton 4. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] This utility model provides, for example Figures 1-3 The lake water pollution control system shown includes:

[0030] Pretreatment unit 1 is set at the rainwater outlet. The pretreatment unit 1 is a continuous three-chamber tank, which includes a sedimentation tank 11, a filtration tank 12 and an aeration tank 13 in sequence. The bottoms of the filtration tank 12 and the aeration tank 13 are connected by a sewage discharge steel trough 14 and are covered with stainless steel plates. A sewage pump 15 is installed at the bottom of the sedimentation tank 11.

[0031] The biological coupling unit 2 includes two layers of stainless steel module purification racks 21. The upper layer is set with filter media ecological modules 22, the middle layer is set with a grid frame 23 filled with granular ecological filter media, and the bottom layer is planted with submerged plants. The submerged plants are arranged around the lake, including Myriophyllum spicatum and Vallisneria natans.

[0032] The intelligent monitoring unit includes an online water quality monitoring device 3 and a liquid level sensor. The online water quality monitoring device 3 is arranged at the outlet of the aeration tank 13 and key nodes of the lake.

[0033] The three-stage pretreatment unit 1 achieves physical sedimentation, filtration, and aeration. The biological coupling unit 2 utilizes ecological filter media and plants to construct a microbial-plant synergistic purification system. The intelligent monitoring unit senses water quality changes in real time. The integrated design reduces land occupation, the ecological treatment method avoids chemical pollution, and automated monitoring improves system response speed. It can reduce pollutants entering the lake, adsorb and degrade water pollutants, restore the lake ecosystem, increase the lake's self-purification capacity, and maintain stable and good lake water quality.

[0034] In this embodiment, as Figure 2 As shown, an overflow wall 16 is provided between the sedimentation tank 11 and the filter tank 12. The height of the overflow wall 16 is 2 / 3 of the height of the sedimentation tank 11, and the effluent enters the filter tank 12 through the overflow. The overflow wall 16 controls the water flow rate, so that large particles can be fully settled in the sedimentation tank 11, improving sedimentation efficiency, reducing the load on the filter tank 12, and extending the service life of the filter media.

[0035] In this embodiment, as Figure 2 As shown, the filter tank 12 adopts a top-in, bottom-out gravity flow filtration method. The filter media includes a sponge layer, a coconut fiber layer, an activated carbon layer, and an ecological filter media layer arranged sequentially from top to bottom, with thicknesses of 15cm, 10cm, 20cm, and 30cm, respectively. The multi-layer filter media form a gradient interception, and the gravity flow reduces energy consumption, improves the removal rate of suspended solids and COD, and reduces the system operating cost.

[0036] In this embodiment, as Figure 2As shown, the bottom of the aeration tank 13 is evenly distributed with microporous aeration rods 17, spaced 30cm x 30cm apart. A dissolved oxygen probe is installed and linked to the aeration controller. The system operates when the dissolved oxygen level in the water is below 2mg / L, providing short-term aeration. High-efficiency mass transfer is achieved through microporous aeration, and precise aeration is realized through dissolved oxygen linkage control. This improves aeration efficiency, saves energy, is environmentally friendly, and avoids the inhibition of microbial activity caused by over-aeration.

[0037] In this embodiment, as Figure 3 As shown, the purification frame 21 of the bio-coupling unit 2 is equipped with six support columns. The height of the support columns is set according to the lake slope, and adjacent purification frames 21 are spaced 1m apart. The six support columns enhance stability, and their spaced arrangement promotes water flow turbulence, improves the wind and wave resistance of the purification frame 21, and increases the mass transfer efficiency of pollutants.

[0038] In this embodiment, the ecological filter media is a porous silica-alumina crystalline compound with a particle size of 3-5 mm, a specific surface area ≥800 m² / g, and an internal pore size distribution of 0.1-50 μm. The ecological filter media provides biofilm attachment sites, forming a microbial film and reducing the organic matter content in the water. The difference in dissolved oxygen environment inside and outside the ecological filter media enables simultaneous nitrification and denitrification, improving TN removal rate and enhancing resistance to shock loads.

[0039] In this embodiment, as Figure 3 As shown, the filter media ecological module 22 is a cubic structure with a side length of 50cm, filled with a mixed substrate, including peat moss, perlite, and humus in a volume ratio of 3:1:1. The mixed substrate provides the nutrients needed for the growth of emergent plants, including calamus, lotus, reeds, and canna lilies. The cubic structure forms a micro-ecosystem, improving the survival rate of emergent plants, increasing TP removal rate, and simultaneously achieving a landscape effect.

[0040] In this embodiment, the online water quality monitoring device 3 includes a COD sensor, an ammonia nitrogen sensor, a total phosphorus sensor, and a dissolved oxygen sensor. The monitoring data is transmitted to the cloud platform in real time via a GPRS module, shortening the early warning response time.

[0041] In this embodiment, as Figure 2 As shown, a level gauge 18 is installed at the inlet of the sedimentation tank 11, which is linked to the sewage pump 15 for control. When the liquid level exceeds a set threshold, the sewage pump 15 is activated. The level-linked control enables automated sewage discharge, reduces the frequency of manual inspections, and lowers the risk of overflow pollution during the rainy season.

[0042] In this embodiment, as Figure 1 As shown, phytoplankton 4 is arranged between the biological coupling units. Phytoplankton 4 includes water lily, duckweed and water chestnut or one or two of them.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A system for treating pollution in a lake water environment, characterized by comprising: The utility model relates to a rainwater treatment system, comprising: a pretreatment unit arranged at a rainwater outlet, the pretreatment unit being a continuous three-format pool body comprising a sedimentation pool, a filter pool and an aeration pool in sequence, the filter pool and the aeration pool being connected through a sewage steel tank and provided with a stainless steel cover plate, and a sewage pump being arranged at the bottom of the sedimentation pool; a biological coupling unit comprising two layers of stainless steel module purification frames, an upper layer being provided with a filter material ecological module, an intermediate layer being provided with a net-format frame body filled with granular ecological filter material, and a bottom layer being planted with submerged plants, and the biological coupling unit being arranged around a lake; a smart monitoring unit comprising a water quality online monitoring device and a liquid level sensor, the water quality online monitoring device being arranged at the water outlet end of the aeration pool and key nodes of the lake body.

2. The system for treating pollution in a lake water environment according to claim 1, characterized in that: An overflow wall is arranged between the sedimentation pool and the filter pool, the height of the overflow wall being 2 / 3 of the height of the sedimentation pool, and water outlet being achieved through overflow into the filter pool.

3. The system for treating pollution in a lake water environment according to claim 1, characterized in that: The filter pool adopts a gravity flow filtration mode with water flowing from top to bottom, the filter medium comprising a sponge layer, a coconut palm layer, an activated carbon layer and an ecological filter material layer, the thicknesses being 15 cm, 10 cm, 20 cm and 30 cm respectively.

4. The system for treating pollution in a lake water environment according to claim 1, characterized in that: The bottom of the aeration pool is uniformly provided with micro-porous aeration rods, the spacing between the aeration rods being 30 cm x 30 cm, and a dissolved oxygen probe being arranged to be linked with an aeration controller.

5. The system for pollution control of a lake water environment according to claim 1, characterized in that: The purification frames of the biological coupling unit are provided with six support columns, adjacent purification frames being spaced apart by 1 m.

6. The system for pollution control of a lake water environment according to claim 1, characterized in that: The ecological filter material is a porous silicon-aluminum crystal compound, the particle size being 3-5 mm, the specific surface area being greater than or equal to 800 m² / g, and the internal pore size distribution being 0.1-50 μm.

7. The system for pollution control of a lake water environment according to claim 1, characterized in that: The filter material ecological module is a cube structure with a side length of 50 cm, the inside being filled with mixed substrates including peat soil, perlite and humus, the volume ratio being 3:1:

1.

8. The system for pollution control of a lake water environment according to claim 1, characterized in that: The water quality online monitoring device comprises a COD sensor, an ammonia nitrogen sensor, a total phosphorus sensor and a dissolved oxygen sensor, and monitoring data is transmitted in real time to a cloud platform through a GPRS module.

9. The system for pollution control of a lake water environment according to claim 1, characterized in that: A liquid level meter is arranged at the water inlet of the sedimentation pool and linked with the sewage pump to control the sewage pump, the sewage pump being started when the liquid level exceeds a set threshold value.

10. The system for pollution control of a lake water environment according to claim 1, characterized in that: Plankton is arranged between the biological coupling units.

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