Ecological aeration filter bed suitable for low-pollution water treatment

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an ecological aeration filter bed suitable for low-pollution water treatment. Comprising a filtering space defined by ecological revetments, the filtering space sequentially comprises a water inlet channel, a filter bed body and a water outlet channel from a water inlet end to a water outlet end, a water inlet is formed in one side of the water inlet channel, and a water outlet is formed in one side of the water outlet channel; a filter material supporting scaffold is arranged in the filter bed body, an ecological filter material layer is arranged on the filter material supporting scaffold, an aeration membrane is arranged at the bottom of the filter bed body, an air inlet pipe is connected to the aeration membrane, and a connector is arranged on the air inlet pipe; a water inlet and outlet water distribution channel is newly added to change the water flow direction, and artificial aeration oxygenation, an ecological filter material layer treatment unit and other comprehensive engineering means are added to improve the self-purification capacity of the wetland water body through a physical and chemical process and a biochemical process.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, in particular to an ecological aeration filter bed suitable for low-pollution water treatment. Background Art

[0002] Lake wetlands are formed by the swamping process of lake shores or shallow lakes, and also include the lake water itself. Lake wetlands belong to the ecotone and have unique structures and functions. Structurally, lake wetlands are composed of highlands, water level fluctuation zones, and shore zones. The highlands are dominated by trees and shrubs, the water level fluctuation zones are dominated by wetland plants and emergent plants, and the shore zones are dominated by emergent plants, floating plants, and submerged plants. These plants, together with life factors such as animals and microorganisms living in them, and non-life factors such as sunlight, water, and soil, are in a dynamic open system, interconnected, mutually restricted, and play a series of functions. Lake wetlands have ecological values ​​such as flood control, sedimentation control, water quality improvement, and biodiversity, as well as economic values ​​such as climate regulation, water supply, aquaculture, and shipping.

[0003] At present, with the continuous development of the economy, lakes and wetlands are also facing environmental problems. The main environmental problems include the large-scale disappearance of lakes and wetlands and the increasingly serious environmental pollution. Therefore, low-pollution water needs to be treated.

[0004] In the patent application with the publication number CN 213265915 U, a lake wetland restoration device is disclosed, including a wetland and a water body therein, a protective raft is arranged around the water body, a water pump is arranged on the wetland, the water pump is respectively connected to a pumping pipe assembly and a water supply pipe, the pumping pipe assembly is connected to the water body and suspended on the surface of the water body, the pumping pipe assembly includes a main pipe and a plurality of branch pipes arranged at equal intervals along the axis direction of the main pipe, the main pipe and the branch pipes are interconnected, a plurality of pumping holes are opened on the main pipe and the branch pipes, a plurality of inflatable bags are also attached along the axis direction of the main pipe, and an inflatable bag is also attached at the end of each branch pipe, a percolation bed is arranged on the wetland, and the water supply pipe is connected to the percolation bed. By adopting the above-mentioned arrangement, it has the advantages of integrating ecological balance and water body restoration, short cycle and quick effect.

[0005] However, in the prior art, there is no limitation on the water inlet method, and there is no internal oxygenation, so the treatment effect on low-pollution water bodies is not good. Therefore, the present application proposes an ecological aeration filter bed suitable for low-pollution water treatment. Utility Model Content

[0006] The purpose of the utility model is to propose an ecological aeration filter bed suitable for low-pollution water treatment, a technology that improves the self-purification capacity of wetland water through physical and chemical processes and biochemical processes by comprehensive engineering means such as adding water inlet and outlet channels to change the direction of water flow, increasing artificial aeration and oxygenation, and ecological filter layer treatment units.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The ecological aeration filter bed suitable for low-pollution water treatment includes a filtration space surrounded by an ecological revetment. The filtration space includes an inlet channel, a filter bed body and an outlet channel from the water inlet end to the water outlet end. A water inlet is arranged on one side of the inlet channel, and a water outlet is arranged on one side of the outlet channel.

[0009] Furthermore, a filter material supporting scaffold is provided in the filter bed body, an ecological filter material layer is provided on the filter material supporting scaffold, an aeration membrane is provided on the bottom of the filter bed body, an air inlet pipe is connected to the aeration membrane, and a joint is provided on the air inlet pipe.

[0010] Furthermore, water stop plates are arranged in the filter bed body, and the water stop plates are arranged in a staggered manner in the filter bed body to form a baffled flow of water.

[0011] Furthermore, the thickness of the ecological filter material layer is 0.3 meters.

[0012] Furthermore, the water inlet channel adopts a triangular weir structure.

[0013] Furthermore, the ecological filter material layer is a nitrogen and phosphorus removal ecological filter material.

[0014] Furthermore, the bottom surface of the filter bed body is provided with an anti-seepage geomembrane layer and a coconut fiber blanket layer after being compacted with plain soil.

[0015] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0016] The utility model is a technology that improves the self-purification capacity of wetland water bodies through physical and chemical processes and biochemical processes by renovating the original wetland plant oxidation pond or reservoir pond wetland, adding inlet and outlet water distribution channels to change the direction of water flow, adding artificial aeration and oxygenation, and ecological filter layer treatment units and other comprehensive engineering means. The technology focuses on wetland restoration. Its construction changes the wetland structure. First, the water distribution of the inlet and outlet channels is increased. The inlet channel adopts a triangular weir to form a uniform water inlet channel. When the sewage passes through the filter layer of the scaffolding as a supporting structure, the suspended solids SS in the water move to the surface of the filter material through precipitation, physical interception, hydrodynamics and other processes and adsorbs and precipitates. Since the pipe flow effect between the filter materials is more conducive to precipitation, the effect of contact precipitation is more significant than that of natural wetlands; furthermore, the ecological filter material with large filling porosity, large specific surface area and easy film-forming denitrification and phosphorus removal is adopted. Through the adsorption of the filter material and the decomposition of the biofilm, the content of nitrogen and phosphorus pollutants in the water body is effectively reduced. At the same time, the installation of the water stop plate effectively reduces the dead corners of the inlet and outlet water, forming a baffled inlet and outlet water. Through artificial aeration and oxygenation, the dissolved oxygen in the water can be effectively increased, and the efficiency of aerobic bacteria in removing pollutants in the water can be improved.

[0017] The purification mechanism is mainly divided into three parts:

[0018] ① Adsorption effect of filter layer: filter material made of specific adsorption material is used to remove pollutants through multiple effects of physical adsorption, chemical adsorption and biological adsorption.

[0019] ②The function of water stop plate: the installation of water stop plate can form a baffle effect on water body, shorten the residence time of water body and save the land for treatment.

[0020] ③ Oxidative decomposition: through aeration and oxygenation, a stable aerobic ecosystem is constructed in the water body, which is conducive to the growth of aerobic bacteria, and the organic matter is decomposed as nutrients, transforming it into simple inorganic substances containing C, N, P, etc., which can be absorbed and utilized by the subsequent wetland plant system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a plan view of the utility model;

[0022] Figure 2 It is the cross-sectional view 1-1 of the utility model.

[0023] In the figure, 1-water inlet channel; 2-filter bed body; 3-water outlet channel; 4-water inlet; 5-water outlet; 6-filter material support scaffolding; 7-ecological filter material layer; 8-joint; 9-water stop plate; 10-aeration membrane. DETAILED DESCRIPTION

[0024] like Figure 1-2 In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] Example

[0026] An ecological aeration filter bed suitable for low-pollution water treatment includes a filtering space surrounded by an ecological revetment, wherein the filtering space includes an inlet channel 1, a filter bed body 2 and an outlet channel 3 from the water inlet end to the water outlet end, a water inlet 4 is arranged on one side of the inlet channel 1, and a water outlet 5 is arranged on one side of the outlet channel 3;

[0027] The utility model is a technology that improves the self-purification capacity of wetland water bodies through physical and chemical processes and biochemical processes by comprehensive engineering means such as remodeling the original wetland plant oxidation pond or reservoir pond wetland, adding inlet and outlet water distribution channels to change the direction of water flow, adding artificial aeration and oxygenation, and ecological filter layer treatment units. The technology focuses on wetland restoration. Its construction modifies the wetland structure. First, water distribution is added to the inlet and outlet channels. The inlet channel uses a triangular weir to form a uniform water inlet channel. When sewage passes through the filter layer of the scaffolding as a supporting structure, the suspended solids SS in the water move to the filter surface through sedimentation, physical interception, hydrodynamics and other processes and adsorb and precipitate. Since the pipe flow effect between the filter materials is more conducive to sedimentation, the effect of contact sedimentation is more significant than that of natural wetlands.

[0028] Among them, a filter material supporting scaffold 6 is arranged in the filter bed body 2, an ecological filter material layer 7 is arranged on the filter material supporting scaffold 6, an aeration membrane 10 is arranged on the bottom of the filter bed body 2, an air inlet pipe is connected to the aeration membrane 10, and a joint 8 is arranged on the air inlet pipe. Through artificial aeration and oxygenation, the dissolved oxygen in the water body is effectively increased, and the efficiency of aerobic bacteria in removing pollutants in the water body is improved; through aeration and oxygenation, a stable aerobic ecosystem of the water body is constructed, which is conducive to the growth of aerobic bacteria, and the organic matter is used as a nutrient for enhanced decomposition and converted into simple inorganic substances containing C, N, P, etc., which are absorbed and utilized by the subsequent wetland plant system.

[0029] Among them, a water stop plate 9 is arranged in the filter bed body 2. The water stop plates 9 are staggered in the filter bed body 2 to make the water form a baffle. The installation of the water stop plates makes the water form a baffle effect, shortens the water residence time, and saves processing land.

[0030] The thickness of the ecological filter material layer 7 is 0.3 meters, and the filter material made of a specific adsorption material is used to remove pollutants through multiple effects of physical adsorption, chemical adsorption and biological adsorption.

[0031] Among them, the water inlet channel 1 adopts a triangular weir structure.

[0032] Among them, the ecological filter material layer 7 is an ecological filter material for denitrification and phosphorus removal. Furthermore, an ecological filter material for denitrification and phosphorus removal with large filling porosity, large specific surface area and easy film formation is adopted. Through the adsorption of the filter material and the decomposition of the biofilm, the content of nitrogen and phosphorus pollutants in the water body is effectively reduced. At the same time, the installation of the water stop plate effectively reduces the dead corners of water inlet and outlet, forming a baffled water inlet and outlet.

[0033] Among them, the bottom surface of the filter bed body 2 is provided with an anti-seepage geomembrane layer and a coconut fiber blanket layer after being compacted by plain soil, which has a good anti-seepage effect.

[0034] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. Ecological aeration filter bed suitable for low-pollution water treatment, characterized by: The invention comprises a filtering space surrounded by an ecological revetment, wherein the filtering space comprises an inlet channel (1), a filter bed body (2) and an outlet channel (3) in sequence from the water inlet end to the water outlet end, wherein a water inlet (4) is arranged on one side of the inlet channel (1), and a water outlet (5) is arranged on one side of the outlet channel (3); a filter material support scaffold (6) is arranged in the filter bed body (2), an ecological filter material layer (7) is arranged on the filter material support scaffold (6), an aeration membrane (10) is arranged at the bottom of the filter bed body (2), an air inlet pipe is connected to the aeration membrane (10), and a joint (8) is arranged on the air inlet pipe; a water stop plate (9) is arranged in the filter bed body (2), and the water stop plates (9) are arranged in a staggered manner in the filter bed body (2) so that water forms a baffle.

2. The ecological aeration filter bed suitable for low-pollution water treatment according to claim 1 is characterized in that: The thickness of the ecological filter material layer (7) is 0.3 m.

3. The ecological aeration filter bed suitable for low-pollution water treatment according to claim 1 is characterized in that: The water inlet channel (1) adopts a triangular weir structure.

4. The ecological aeration filter bed suitable for low-pollution water treatment according to claim 1 is characterized in that: The ecological filter material layer (7) is a nitrogen and phosphorus removal ecological filter material.

5. The ecological aeration filter bed suitable for low-pollution water treatment according to claim 1 is characterized in that: The bottom surface of the filter bed body (2) is provided with an anti-seepage geomembrane layer and a coconut fiber blanket layer after being compacted with plain soil.

Images