Ecological aeration filter column for rural decentralized sewage treatment

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an ecological aeration filter column for rural decentralized sewage treatment. Comprising a steel frame structure formed by welding steel rings and steel bars, rhombic steel grids are welded to the steel frame structure to form a filtering space, the specification of the rhombic steel grids is 5mm * 3mm, a light absorption film layer is arranged on the inner wall of the filtering space, canna indica is planted at the top of the filtering space, a cofferdam is arranged at the top of the steel frame structure, and a support is arranged at the bottom of a steel frame. A first separation net, a second separation net, a third separation net and a fourth separation net are arranged in the filtering space from top to bottom, a first filter material layer is arranged at the top of the first separation net, a water distributor is arranged in the first filter material layer, a second filter material layer is arranged between the first separation net and the second separation net, and a microorganism group layer is arranged between the second separation net and the third separation net; a third filter material layer and a fourth filter material layer are arranged between the third separation net and the fourth separation net, and an aeration system is arranged in the microorganism group layer and is connected with an external aeration pipeline; the sewage treatment effect is relatively good.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, in particular to an ecological aeration filter column for rural decentralized sewage treatment. Background Art

[0002] Sewage treatment systems are generally used in the sewage treatment process.

[0003] In the patent document with the publication number CN204625422U, a sewage treatment system is disclosed, including a biological filter bed and an ecological composite bed connected by a pipeline. The biological filter bed is a cylindrical tank with spherical ends, which is divided into a sewage tank, a regulating tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a clear water tank in sequence. Among them, an air lift pump connected to a lifting pipeline for uniformly conveying sewage is provided in the regulating tank. The air lift pump provides kinetic energy through an air pump, and the air pump is connected to a solar cell panel; a guide tube is provided in the sedimentation tank, a guide tube is provided on the guide tube, and S-shaped filter beds and reflective plates are distributed on both sides and below the guide tube; the utility model adopts an air pump instead of a traditional water pump, and adopts a solar cell to convert solar energy into electrical energy, so that the system can achieve low-noise sewage treatment when there is sufficient solar energy, and the filtration is more sufficient by providing a guide tube, a reflective plate located below the guide tube and an S-shaped filter bed distributed on both sides of the guide tube.

[0004] However, in the above prior art, although there is a biological filter bed, the water inlet and outlet ends of the biological filter bed are on the same horizontal plane, and the moisture in the sludge is difficult to discharge. Therefore, this application proposes an ecological aeration filter column for rural decentralized sewage treatment. Utility Model Content

[0005] The utility model aims to provide an ecological aeration filter column for rural decentralized sewage treatment, which integrates vertical flow sewage treatment technology and artificial oxygenation aeration backwash technology and has a better sewage treatment effect.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An ecological aeration filter column for rural decentralized sewage treatment includes a steel frame structure welded by steel rings and steel bars, a diamond steel grid is welded on the steel frame structure to form a filtering space, the specification of the diamond steel grid is 5mm*3mm, a light-absorbing film layer is arranged on the inner wall of the filtering space, canna is planted on the top, a cofferdam is arranged on the top of the steel frame structure, and a bracket is arranged at the bottom of the steel frame.

[0008] The filter space is provided with a first partition net, a second partition net, a third partition net and a fourth partition net from top to bottom. The top of the first partition net is a first filter material layer. A water distributor is provided in the first filter material layer. The second filter material layer is between the first partition net and the second partition net.

[0009] A microorganism group layer is provided between the second and third partition nets, a third filter material layer and a fourth filter material layer are provided between the third and fourth partition nets, and an aeration system is provided in the microorganism group layer, and the aeration system is connected to an external aeration pipeline.

[0010] Furthermore, the first filter material layer is a melon stone layer.

[0011] Furthermore, the second filter material layer is an ecological filter material layer.

[0012] Furthermore, the third filter material layer is an activated carbon layer.

[0013] Furthermore, the fourth filter material layer is a quartz sand layer.

[0014] Compared with the prior art, the utility model has at least one of the following beneficial effects:

[0015] The utility model integrates vertical flow sewage treatment technology and artificial oxygenation aeration backwash technology. The equipment distributes water through a high-level water distribution tank, and the top of the ecological aeration filter column is equipped with a water inlet distributor to change the direction of water flow, increase artificial aeration and oxygenation, and the ecological aeration filter column (high-efficiency filter layer treatment) unit and other comprehensive means to purify sewage through physical and chemical processes and biochemical processes. The technology focuses on artificially constructing the filter layer, and its construction adopts the principle of vertical filtration. The sewage first passes through the water distributor to evenly distribute water, and the filter layer will form a continuous water flow channel. When the sewage passes through, the suspended solids (SS) in the water move to the surface of the filter material through precipitation, physical interception, hydrodynamics and other processes and adsorb and decompose. Since the pipe flow effect between the filter layers is more conducive to precipitation and pollutant interception, the effect of contact adsorption is significant; furthermore, the use of filter materials of different materials and different properties can efficiently adsorb and decompose pollutants in the water body, effectively reduce the content of nitrogen and phosphorus pollutants in the water body passing through, and effectively increase the dissolved oxygen in the water body through artificial aeration and oxygenation, and improve the efficiency of aerobic bacteria in removing pollutants in the water body. Aeration can also solve the blockage of the filter layer.

[0016] The purification mechanism is mainly divided into three parts:

[0017] ① Vertical flow interception effect. The filter column adopts the structure of water inlet at the top and outlet at the bottom. The outlet water is collected by the bottom cofferdam and enters the next treatment link. Large particles of pollutants in the sewage are intercepted by the filter materials of different filter layers; clean water seeps out from the lower end of the filter column.

[0018] ② Filter layer adsorption effect: filter media made of specific adsorption materials are used to remove pollutants through multiple effects of physical adsorption, chemical adsorption and biological adsorption.

[0019] ③ Oxidative decomposition, that is, the filter material is used as a carrier of a large number of microorganisms, micro-animals, and snails and mollusks in water purification, and the aeration and filter material ecosystem are constructed. Organic matter is decomposed as nutrients and converted into simple inorganic matter containing C, N, P, etc., which is absorbed and utilized by the biofilm and plant system of the aeration filter column unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is the elevation drawing of the steel frame of the utility model;

[0022] Figure 3 This is the plan view of the utility model;

[0023] Figure 4 This is a plan view of the steel frame of the utility model.

[0024] In the figure, 1-canna; 2-cofferdam; 3-first filter material layer; 4-steel frame; 5-light-absorbing film layer; 6-first separator; 7-second filter material layer; 8-second separator; 9-microorganism group layer; 10-third separator; 11-third filter material layer; 12-fourth filter material layer; 13-fourth separator; 14-support; 15-steel ring; 16-steel bar; 17-aeration system; 18-water distributor. DETAILED DESCRIPTION

[0025] like Figure 1-4 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.

[0026] Example

[0027] An ecological aeration filter column for rural decentralized sewage treatment includes a steel frame 4 structure welded by a steel ring 15 and a steel bar 16, a diamond steel grid is welded on the steel frame 4 structure to form a filtering space, a light-absorbing film layer 5 is arranged on the inner wall of the filtering space, the light-absorbing film layer 5 is PVC, a canna 1 is planted on the top, a cofferdam 2 is arranged on the top of the steel frame 4 structure, and a bracket 14 is arranged at the bottom of the steel frame 4.

[0028] The filter space is provided with a first screen 6, a second screen 8, a third screen 10 and a fourth screen 13 from top to bottom. The top of the first screen 6 is a first filter material layer 3. A water distributor 18 is provided in the first filter material layer 3. The second filter material layer 7 is between the first screen 6 and the second screen 8.

[0029] The microorganism group layer 9 is between the second screen 8 and the third screen 10, and the third filter material layer 11 and the fourth filter material layer 12 are arranged between the third screen 10 and the fourth screen 13, and an aeration system 17 is arranged in the microorganism group layer 9, and the aeration system 17 is a Φ80 aerator, and the aeration system 17 is connected to the external aeration pipe; the utility model integrates vertical flow sewage treatment technology and artificial oxygenation aeration backwash technology, the equipment distributes water through a high-level water distribution tank, and the top of the ecological aeration filter column is equipped with a water inlet distributor to change the direction of water flow, increase artificial aeration and oxygenation, and the ecological aeration filter column (high-efficiency filter layer treatment) unit and other comprehensive means to purify sewage through physical and chemical processes and biochemical processes. The technology focuses on artificially constructing the filter layer, and its construction adopts the principle of vertical filtration. The sewage first passes through the water distributor to evenly distribute water, and the filter layer will form a continuous water flow channel. When the sewage passes through, the suspended solids (SS) in the water move to the filter material surface through sedimentation, physical interception, hydrodynamics and other processes and adsorb and decompose. Since the pipe flow effect between filter layers is more conducive to sedimentation and interception of pollutants, the effect of contact adsorption is significant; furthermore, the use of filter media with different materials and different properties can efficiently adsorb and decompose pollutants in the water, effectively reduce the content of nitrogen and phosphorus pollutants in the water passing through, and effectively increase the dissolved oxygen in the water through artificial aeration and oxygenation, thereby improving the efficiency of aerobic bacteria in removing pollutants in the water. Aeration can also solve the problem of filter layer blockage.

[0030] During use, the ecological aeration filter column adopts a multi-layer series structure. The number of aeration filter columns is determined according to the amount of water treated and the water quality. The ecological aeration filter stacking site is cast with 100mm plain concrete, and the surrounding cofferdam is made of bricks with a height of 120mm.

[0031] More specifically, the first filter material layer 3 is a melon stone layer; the second filter material layer 7 is an ecological filter material layer; the third filter material layer 11 is an activated carbon layer; the fourth filter material layer 12 is a quartz sand layer.

[0032] The purification mechanism is mainly divided into three parts:

[0033] ③Vertical flow interception effect. The filter column adopts the structure of water inlet at the top and outlet at the bottom. The outlet water is collected by the bottom cofferdam and enters the next treatment link. Large particles of pollutants in the sewage are intercepted by the filter materials of different filter layers; clean water seeps out from the lower end of the filter column.

[0034] ④ Filter layer adsorption effect: filter media made of specific adsorption materials are used to remove pollutants through multiple effects of physical adsorption, chemical adsorption and biological adsorption.

[0035] ③ Oxidative decomposition, that is, the filter material is used as a carrier of a large number of microorganisms, micro-animals, and snails and mollusks in water purification, and the aeration and filter material ecosystem are constructed. Organic matter is decomposed as nutrients and converted into simple inorganic matter containing C, N, P, etc., which is absorbed and utilized by the biofilm and plant system of the aeration filter column unit.

[0036] 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. An ecological aeration filter column for rural decentralized sewage treatment, characterized by: The invention comprises a steel frame (4) structure welded by a steel ring (15) and a steel bar (16), a diamond-shaped steel grid is welded on the steel frame (4) structure to form a filtering space, a light-absorbing film layer (5) is arranged on the inner wall of the filtering space, canna (1) is planted on the top, a cofferdam (2) is arranged on the top of the steel frame (4), a bracket (14) is arranged on the bottom of the steel frame (4), and the filtering space is provided with a first partition (6), a second partition (8), a third partition (10) and a fourth partition (13) from top to bottom, the top of the first partition (6) is provided with a light-absorbing film layer (5), and a canna (1) is planted on the top. The invention relates to a first filter material layer (3), a water distributor (18) is provided in the first filter material layer (3), a second filter material layer (7) is provided between the first partition net (6) and the second partition net (8), a microorganism group layer (9) is provided between the second partition net (8) and the third partition net (10), a third filter material layer (11) and a fourth filter material layer (12) are provided between the third partition net (10) and the fourth partition net (13), and an aeration system (17) is provided in the microorganism group layer (9), and the aeration system (17) is connected to an external aeration pipe.

2. The ecological aeration filter column for rural decentralized sewage treatment according to claim 1, characterized in that: The first filter material layer (3) is a melon-stone layer.

3. The ecological aeration filter column for rural decentralized sewage treatment according to claim 1, characterized in that: The second filter material layer (7) is an ecological filter material layer.

4. The ecological aeration filter column for rural decentralized sewage treatment according to claim 1, characterized in that: The third filter material layer (11) is an activated carbon layer.

5. The ecological aeration filter column for rural decentralized sewage treatment according to claim 1, characterized in that: The fourth filter material layer (12) is a quartz sand layer.

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