An ecological filtration drainage system and method for black and odorous water body sediment treatment

Abstract

The application provides an ecological filtering and draining system and method for treating black and odorous water body sediment, and the method comprises the steps of laying pipes, excavating trenches, laying purification systems, installing water pumps and the like. The application can realize efficient treatment of black and odorous water body and sediment, and the method is relatively simple and easy to implement.

Description

Technical Field

[0001] The present invention relates to the technical field of water body treatment, and in particular to an ecological filtration and drainage system and method for treating bottom mud in black and odorous water bodies. Background Art

[0002] Cities in the middle and lower reaches of the Yangtze River, due to their shallow channel gradient and poor water mobility, can be considered almost stagnant water. This results in insufficient oxygen content and poor self-purification capacity. Furthermore, the sediments in this region are characterized by fine particles, low permeability, and poor water permeability, making them susceptible to pollutant adsorption. This lack of water dynamics creates a low dissolved oxygen environment, significantly weakening the ability of microorganisms to degrade pollutants. Summary of the Invention

[0003] In response to the above-mentioned existing technologies, the present invention proposes an ecological filtration and drainage system and method for the treatment of black and odorous water body sediments, so as to improve the water dynamics and microbial habitat of river water and sediments in the middle and lower reaches of the Yangtze River, and achieve efficient treatment of black and odorous water bodies and sediments.

[0004] The present invention provides an ecological filtration and drainage method for treating bottom mud in black and odorous water bodies, comprising the following steps:

[0005] S1. Laying Pipes: In areas where black and odorous water is present, select several sections along the width of the river. Lay pipes at a certain distance below the riverbed sediment in each section. Provide several permeable holes in the pipe walls. Install a first filter at the end of the pipe that contacts the sediment.

[0006] S2. Trench excavation: A trench of a certain length is excavated on one side of the selected river channel, with the elevation of the trench lower than the elevation of the pipeline layout point; a water storage tank of a certain volume is installed at the end of the trench;

[0007] S3. Laying out the purification system: Laying out the purification system between the trench and the river channel. Specifically, laying out the second filter screen, the biofilm and carrier, the pebble layer, and the geotextile layer in order from near to far from the river channel. The second filter screen is connected to the other end of the pipeline.

[0008] S4. Install a pump: Install a pump next to the water tank and install a water level sensor inside the water tank. When the water level measured by the water level sensor reaches the preset water level, the pump is turned on. The pump draws the water in the water tank into the original river channel, realizing a water circulation.

[0009] Preferably, in S1, the method for selecting the distance between the pipeline layout point and the bottom mud surface is: place the test pipeline vertically in the water body so that it contacts the bottom mud surface; do not apply artificial force to the test pipeline, so that the test pipeline sinks freely in the bottom mud; record the sinking depth of the test pipeline in the bottom mud when it is stationary, and this depth is the pipeline layout point.

[0010] Preferably, in S1, geotextile is laid on the outside of the pipeline.

[0011] Preferably, the pipeline is a hard polyvinyl chloride pipe.

[0012] Preferably, in S2, the pipeline is arranged to be inclined downward from the first filter screen to the groove.

[0013] Preferably, in S3, an air jet device is installed inside the pipe opening connected to the second filter screen, and the air jet direction of the air jet device is toward the other pipe opening.

[0014] Preferably, in S3, an inorganic glass material is used as a carrier, the biofilm is laid on the carrier, and the microorganisms on the biofilm are local indigenous microorganisms.

[0015] Preferably, in S4, solar energy is used to power the water pump, and a power controller is fixed inside the water pump housing; the input end of the power controller is connected to a solar panel, which is fixed to the top of the water pump housing and is located outside the water pump housing; the output end of the power controller is connected to a lithium battery, which is located inside the device housing, and a battery removal port is provided on the device housing for removing the lithium battery from the battery removal port; the power controller converts the solar energy received by the solar panel into a suitable voltage, and then charges the lithium battery. When the water pump is working, the lithium battery supplies power to the water pump.

[0016] The present invention also provides an ecological filtration and drainage system for treating bottom mud in black and odorous water bodies, comprising:

[0017] Grooves: located on one side of a river channel;

[0018] A purification system is provided between the trench and the river channel; the purification system comprises, from near to far from the river channel, a second filter screen, a biofilm and carrier, a pebble layer, and a geotextile layer;

[0019] A plurality of pipes are provided in the riverbed mud; one end of the pipe is connected to the second filter screen, and the other end of the pipe is provided with the first filter screen; a plurality of water-permeable holes are provided on the pipe wall of the pipe;

[0020] a water storage tank, disposed at the end of the trench;

[0021] A water pump is used to connect the water tank and the river.

[0022] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention proposes an ecological filtration and drainage method for the treatment of bottom sediments in black and odorous water bodies, which uses hydrodynamics to realize the function of activating water, and to a certain extent increases the fluidity of water bodies in black and odorous water bodies and bottom sediments, and increases the oxygen content in water bodies and bottom sediments, which is beneficial to the self-purification of water bodies and bottom sediments. In addition, this method uses microorganisms on specific biofilms to achieve cyclic purification of black and odorous water bodies. In addition, the layout of the pipeline maintains the ecology of the bottom sediment above the layout point, and this part of the bottom sediment also plays a certain purification role on the water body. In addition, the method is relatively simple as a whole and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of pipeline layout point selection in an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the layout of ecological filtration and drainage in an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the structure of the purification system in an embodiment of the present invention.

[0026] Figure 4 2 is a schematic diagram comparing water before and after purification in an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the structure of the air injection device in an embodiment of the present invention.

[0028] Figure 6 Schematic diagram of the power supply mode in an embodiment of the present invention.

[0029] In the figure, 1. Pipeline; 2. First filter; 3. Groove; 4. Purification system; 5. Second filter; 6. Biofilm and carrier; 7. Pebble layer; 8. Water storage tank; 9. Water level sensor; 10. Pump; 11. Jet device; 12. Permeable holes; 13. Plane where the installation point is located; 14. Geotextile layer. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0031] The present invention provides an ecological filtration and drainage method for treating black and odorous water body sediments, such as Figure 1-6 As shown, the following steps are included:

[0032] S1. Laying pipes: Select several sections along the width of the river in areas where black and odorous water exists. Lay pipes 1 at a certain distance below the riverbed sediment in each section. Laying pipes 1 in the sediment rather than directly on the surface of the sediment is because when the black and odorous water slowly infiltrates the sediment, the microorganisms in the sediment will decompose the organic matter or harmful substances in the water, thereby playing a preliminary role in purifying the water.

[0033] The method for selecting the distance between the pipeline layout point and the bottom mud surface is as follows: Figure 1 As shown, a test pipe is placed vertically in the water, contacting the bottom mud surface. No artificial force is applied to the test pipe, allowing it to sink freely in the mud. The depth of the test pipe's descent into the mud while stationary is recorded; this depth serves as the pipe's placement point. This method helps determine the pipe's placement point, minimizing damage to the mud ecosystem and preventing the loss of microorganisms above the actual placement point by excavating from the upper mud layer.

[0034] Several permeable holes 12 are provided on the wall of the pipe 1. Since the pipe is under the bottom mud and has a certain height difference with the water bottom, water can flow into the pipe 1 through the permeable holes 12 under the action of the water level difference, realizing the permeable function of the holes.

[0035] A layer of geotextile is laid on the outside of the pipe 1 to play a filtering role.

[0036] A first filter screen 2 is set at the end of the pipe 1 that contacts the bottom mud to prevent the bottom mud or small garbage from entering the pipe 1. In order to prevent the bottom mud above the layout point from being damaged, the pipe 1 is laid out on site by excavating at the installation point of the first filter screen 2 to achieve the connection of the pipe 1 for side bank drainage.

[0037] To prevent the blockage of the pipeline due to the small diameter, a pipeline with a larger diameter is selected for laying. Pipeline 1 adopts rigid polyvinyl chloride pipe (UPVC), which has high impact resistance and chemical resistance.

[0038] S2. Trench excavation: A trench 3 of a certain length is excavated on one side of the selected river channel. The length can be 5m. The elevation of the trench 3 is lower than the elevation of the pipeline layout point. A water storage tank with a certain volume is set at the end of the trench. The volume can be 1m 3 The pipeline 1 is arranged to be inclined downward from the first filter screen 2 to the groove 3. The inclination of the pipeline 1 can reduce the sinking of the bottom mud into the pipeline 1.

[0039] S3. Install a purification system: A purification system is installed between the trench 3 and the river channel. Specifically, from near to far from the river channel, a second filter screen 5, a biofilm and carrier 6, a pebble layer 7, and a geotextile layer 14 are arranged in order. The second filter screen 5 is connected to the other end of the pipe 1, and an air jet device 11 is installed inside the pipe opening connected to the second filter screen 5. The air jet device 11 can be a small air pump nozzle, and the air jet direction is toward the other pipe opening. This method can not only dredge the pipe 1, but also loosen the bottom mud above the first filter screen 2 at the pipe opening. At the same time, it can also aerate and oxygenate the bottom mud and even black and odorous water. Because the bottom mud in the middle and lower reaches of the Yangtze River has a low permeability coefficient and poor water permeability, the water seepage is extremely slow and the water volume is also small, making air jetting feasible in this method.

[0040] Using side-bank deep-well ecological filtration and drainage technology to purify black and odorous water, an inorganic glass material is considered as a carrier, on which a biofilm is laid. Due to the biofilm's specificity, specific microorganisms are used to treat nitrogen, phosphorus, and organic matter in the black and odorous water. The microorganisms on the biofilm slowly purify the water. To protect the local ecology, the microorganisms on the biofilm are selected from local indigenous microorganisms. A pebble layer 7 is laid on the lower side of the carrier to filter and purify the water again. Geotextiles have the advantages of corrosion resistance, good water permeability, good antimicrobial properties, and easy construction. Using geotextiles can achieve further filtration of the water. This purification system can achieve a certain degree of ecological purification of black and odorous water.

[0041] Since the elevation of the groove 3 is lower than the elevation of the layout point of the pipeline 1, the height difference between the two is utilized to allow the black and smelly water in the river channel to freely seep into the bottom mud from the river channel, enter the pipeline 1 through the permeable holes 12, and then flow through the purification system under the action of the water level difference. The purified water flows through the groove 3 to the water storage tank 8 for storage.

[0042] S4. Install a water pump: Install a water pump 10 next to the water tank 8, and install a water level sensor 9 inside the water tank 8. When the water level measured by the water level sensor 9 reaches a predetermined water level, the water pump 10 is turned on. The water pump 10 draws the water in the water tank 8 into the original river channel, realizing a water circulation.

[0043] The pump 10 is powered primarily by solar energy. A power controller is mounted inside the pump housing. The controller's input is connected to a solar panel, which is mounted on the top of the pump housing and located outside the pump housing. The controller's output is connected to a lithium battery, which is located inside the housing and has a battery removal port for removal. The controller converts the solar energy received by the solar panel into an appropriate voltage, which then charges the lithium battery. The lithium battery then powers the pump when the pump is operating.

[0044] This embodiment intends to screen and domesticate multiple microbial flora such as nitrifying bacteria, denitrifying bacteria such as Paracoccus denitrificans, polyphosphate-accumulating bacteria, and COD-degrading bacteria from river sediment samples to form a composite bacteria, and solidify the dominant flora into a carrier using a micro-nano encapsulation process; use an instrument to detect and record the concentrations of different pollutants such as nitrogen, phosphorus, and organic matter in the river water at regular intervals; use an instrument to detect and record the concentrations of different pollutants such as nitrogen, phosphorus, and organic matter in the ditch water at regular intervals; compare and analyze the above monitoring data to obtain a microbial degradation rate curve, and realize monitoring of the water purification process; use the curve analysis to obtain the time when the river water is purified to meet the water quality standards, and appropriately extend the curve for use in water purification in other river sections.

[0045] The present invention can be deployed at multiple locations on the same river channel to improve the purification effect of the river channel. At the same time, the method mainly uses microorganisms to purify black and odorous water bodies, and the process is relatively slow. After separating the water body, the method uses a pump to send it back to the original river channel, which overall embodies the idea of ​​long-term circulation management.

[0046] The above are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure made using the contents of the present invention's description and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present invention.

Claims

1. An ecological filtration and drainage method for treating black and odorous water body sediment, characterized in that: The steps include: S1. Pipeline Laying: In areas of the river where black and odorous water is present, select several sections along the width of the river channel. Lay pipelines at a certain distance below the riverbed sediment in each section. Provide several permeable holes in the pipeline wall. Install a first filter at the end of the pipeline where it contacts the sediment. The distance between the pipeline laying point and the sediment surface is determined by placing the test pipeline vertically in the water, contacting the sediment surface. No artificial force is applied to the test pipeline, allowing it to sink freely in the sediment. Record the depth of the test pipeline's immersion in the sediment when stationary; this depth serves as the pipeline laying point. S2. Trench excavation: A trench of a certain length is excavated on one side of the selected river channel, with the elevation of the trench lower than the elevation of the pipeline layout point; a water storage tank of a certain volume is installed at the end of the trench; S3. Installing the purification system: A purification system is installed between the trench and the river channel. Specifically, a second filter, a biofilm and carrier, a pebble layer, and a geotextile layer are arranged in order from the nearest to the river channel. The second filter is connected to the other end of the pipe. An inorganic glass material is used as the carrier, and the biofilm is laid on the carrier. The microorganisms in the biofilm are selected from local indigenous microorganisms. S4. Install a pump: Install a pump next to the water tank and install a water level sensor inside the water tank. When the water level measured by the water level sensor reaches the preset water level, the pump is turned on. The pump draws the water in the water tank into the original river channel, realizing a water circulation.

2. The ecological filtration and drainage method for treating black and odorous water sediment according to claim 1, characterized in that: In S1, geotextile is laid on the outside of the pipe.

3. The ecological filtration and drainage method for treating black and odorous water sediments according to claim 1, wherein: The pipeline adopts a hard polyvinyl chloride pipe.

4. The ecological filtration and drainage method for treating black and odorous water sediment according to claim 1, wherein: In S2, the pipeline is arranged to be inclined downward from the first filter screen to the groove.

5. The ecological filtration and drainage method for treating black and odorous water sediment according to claim 1, characterized in that: In S3, an air jet device is installed inside the pipe opening connected to the second filter screen, and the air jet direction of the air jet device is toward the other pipe opening.

6. The ecological filtration and drainage method for treating black and odorous water sediments according to claim 1, characterized in that: In S4, solar energy is used to power the water pump, and a power controller is fixed inside the water pump casing; the input end of the power controller is connected to a solar panel, which is fixed to the top of the water pump casing and is located outside the water pump casing; the output end of the power controller is connected to a lithium battery, which is located inside the device casing, and a battery removal port is provided on the device casing for removing the lithium battery from the battery removal port; the power controller converts the solar energy received by the solar panel into a suitable voltage, and then charges the lithium battery. When the water pump is working, the lithium battery supplies power to the water pump.

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