A green plant treatment structure for sewage treatment

Abstract

A green plant treatment structure for wastewater treatment includes a pre-treatment unit and several treatment tanks connected to the pre-treatment unit via pipelines. A water distributor is installed on the pipeline between the pre-treatment unit and the treatment tanks to supply water to the tanks. Each treatment tank contains a gravel layer, and an inlet pipe is inserted into the gravel layer. A pull-out box is installed below the gravel layer, containing a porous ceramsite layer. The water distributor diverts wastewater to multiple independent treatment tanks. Some treatment tanks can be flexibly opened or closed according to the wastewater volume. The parallel multi-tank design avoids the nutrient competition problem of the series design, ensuring that the plants in each tank can fully absorb nitrogen and phosphorus. The high porosity of the soil layer and the support structure enhance wastewater permeability and improve nutrient utilization, avoiding the problem in traditional wastewater treatment where plants cannot fully absorb nutrients due to rapid wastewater discharge or uneven nutrient distribution.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment, and in particular to a green plant treatment structure for sewage treatment. Background Technology

[0002] Rural domestic sewage treatment is an important part of improving the rural living environment. In order to achieve the standard of effluent quality, the operation and maintenance costs and construction costs will increase accordingly. Due to the scattered rural residences, the drainage pipes between households cannot be connected. Even if the sewage is collected by extending along the main roads in the village, the investment cost is too high and it is difficult to promote the implementation of construction projects. A novel ecological combined sewage treatment device, patent number CN215249814U, comprises a septic tank, a biological purification tank, and a microbial purification tank connected sequentially by connecting pipes, forming a three-stage sewage purification system. The septic tank is connected to an inlet pipe, which is connected to a device containing wastewater generated during daily life, such as kitchen wastewater, washing wastewater, and toilet sludge. The wastewater undergoes anaerobic fermentation treatment within the septic tank. The biological purification tank contains spherical biological packing material and is connected to an aeration pipe. The microbial purification tank contains a filter media layer, with aquatic plants planted on top of the filter media layer. This novel ecological combined sewage treatment device effectively improves the biodegradability of sewage through the anaerobic digestion of the septic tank. Then, the microorganisms growing on the spherical biological packing material degrade pollutants in the sewage. Finally, the filter media layer and the planted aquatic plants work together to achieve deep treatment, ensuring that the effluent meets standards. Existing patents employ the planting of aquatic plants during wastewater treatment, utilizing the synergistic effect of filter media and the planted aquatic plants for deep treatment to ensure effluent meets standards. However, in current wastewater treatment processes, treated wastewater is typically discharged into a treatment tank containing aquatic plants in the final stage. When large quantities of wastewater are discharged, the limited capacity of the treatment tank necessitates timely discharge, preventing the plants from absorbing nitrogen, phosphorus, and other substances from the wastewater. Furthermore, a single treatment tank cannot fully accommodate a large number of plants. When multiple treatment tanks are connected sequentially for hydroponic cultivation, the nitrogen, phosphorus, and other substances required by the plants in the treated wastewater are consumed by the earlier treatment tanks, failing to meet their needs. Additionally, the wastewater discharged from the preceding treatment section before the plants still contains a small amount of untreated impurities, which cannot be completely removed, and these treated impurities cannot be cleaned. To address these issues, a plant-based treatment structure for wastewater treatment is proposed. Utility Model Content

[0003] The purpose of this invention is to solve the following problems in existing sewage treatment: due to the limited capacity of the treatment tank, plants cannot fully absorb nitrogen and phosphorus from the sewage; the cultivation of a large number of plants is limited by the space of a single treatment tank; and when multiple treatment tanks are connected in sequence, the first treatment tank consumes the nitrogen and phosphorus required by the plants in the sewage, which cannot meet the needs of subsequent treatments; and the sewage discharged from the pretreatment section before the treatment tank where the plants are located still contains a small amount of impurities to be treated, which cannot be effectively cleaned, affecting the final effect of sewage treatment.

[0004] The present invention adopts the following technical solution: A green plant treatment structure for wastewater treatment includes a pre-treatment unit and several treatment tanks connected to the pre-treatment unit via pipelines. A water distributor is provided on the pipeline between the pre-treatment unit and the several treatment tanks. Several inlet pipes are connected to the outlet end of the water distributor and extend into the treatment tanks. A valve is provided at the front end of the inlet pipes entering the treatment tanks to control the water inflow to each treatment tank and to supply water to the several treatment tanks through the water distributor. There is a gravel layer in the treatment tanks. The inlet pipes are inserted into the gravel layer. A pull-out box is provided below the gravel layer. A porous ceramsite layer is provided inside the pull-out box. A matrix layer is provided below the pull-out box. The gravel layer, porous ceramsite layer and matrix layer are used to adsorb the small amount of remaining impurities in the wastewater. Furthermore, the portion of the inlet pipe extending into the treatment tank has several openings, a tray is located above the gravel layer, the tray has a U-shaped cross-section, the tray is hung on the upper edge of the treatment tank, a soil layer is placed inside the tray, and several openings for water to pass through are evenly distributed on the bottom surface of the tray. Furthermore, the porosity of the soil layer is 30%-40%, and green plants are cultivated on the soil layer. The soil layer adsorbs nitrogen and phosphorus substances in the sewage that were not completely removed by the previous treatment section, providing nutrients for the growth of the green plants. Furthermore, a partition steel plate is fixed between the gravel layer and the pull-out box. The partition steel plate has several through holes that allow water to pass through. The partition steel plate is fixed inside the treatment tank to support the gravel layer. The gravel layer is filled with gravel with a particle size of 5-10mm and has several water-permeable holes distributed on its surface for preliminary filtration of suspended particles in the wastewater. Furthermore, the side wall of the treatment tank has an opening for taking out and putting in the pull-out box. The outermost end of the pull-out box has a leak-proof baffle. The contact part between the leak-proof baffle and the treatment tank has a sealing ring to prevent sewage leakage. The leak-proof baffle is connected to the treatment tank by bolts to fix the pull-out box to the treatment tank and prevent the pull-out box from falling out of the treatment tank under the pressure of water. Furthermore, the bottom surface of the pull-out box has several openings for sewage to pass through, and the porous ceramsite layer is made of ceramsite with a particle size of 2-5mm and a porosity of ≥50%, which is used to adsorb fine particles and odors in sewage. Furthermore, the substrate layer is made of one or more of coconut coir, sawdust, and peat moss, used to adsorb other impurities in the wastewater; Furthermore, a drain pipe is installed at the location of the substrate layer in the treatment tank to drain the treated water from the treatment tank. A filter screen is installed at the contact point between the drain pipe and the treatment tank to prevent leakage of the substrate layer. A valve is installed on the drain pipe to control the release of water.

[0005] The beneficial effects of this utility model are: Wastewater is diverted to multiple independent treatment tanks by a distributor. Some treatment tanks can be opened or closed flexibly according to the amount of wastewater. The parallel multi-tank design avoids the nutrient competition problem of the series mode, ensuring that the plants in each tank can fully absorb nitrogen and phosphorus. The high porosity of the soil layer and the support structure enhance the permeability of wastewater and improve the nutrient utilization rate. This avoids the problem in traditional wastewater treatment where plants cannot fully absorb nutrients due to the rapid discharge of wastewater or uneven distribution of nutrients. The treatment tank is equipped with a gravel layer, a porous ceramsite layer, and a matrix layer in sequence. The different layers of materials play a role in the treatment of impurities of different particle sizes and types in the wastewater. The pull-out box design makes it easy to clean and replace the porous ceramsite layer after the impurities are adsorbed. Simply open the opening on the side wall of the treatment tank and pull out the pull-out box to operate, which greatly improves the convenience of maintenance and ensures the continuity of impurity treatment effect. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of a green plant treatment structure for sewage treatment according to a utility model. Figure 2 This is a schematic diagram of a treatment box structure for a green plant treatment structure used in sewage treatment, which is a utility model. Figure 3 This is a partial structural diagram of a green plant treatment structure for sewage treatment according to a utility model. In the diagram: 1. Pre-treatment section; 2. Treatment tank; 3. Water distributor; 4. Inlet pipe; 5. Gravel layer; 6. Tray; 7. Soil layer; 8. Separating steel plate; 9. Pull-out box; 10. Leak-proof baffle; 11. Porous ceramsite layer; 12. Substrate layer; 13. Drainage pipe; 14. Green plants; 15. Sealing ring. Detailed Implementation

[0007] The technical solution of this utility model 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 this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0008] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0009] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0010] Example 1 This utility model provides a green plant treatment structure for sewage treatment, including a pre-treatment unit 1 and several treatment tanks 2 connected to the pre-treatment unit 1 by pipelines. A water distributor 3 is provided on the pipeline between the pre-treatment unit 1 and the several treatment tanks 2. Several inlet pipes 4 are connected to the outlet end of the water distributor 3 and extend into the interior of the treatment tanks 2. Sewage is first pre-treated by the pre-treatment unit 1 and then transported to the water distributor 3 through the pipeline. After being distributed by the water distributor 3, it enters the treatment tanks 2 through each inlet pipe 4. The function of the water distributor 3 is to evenly distribute the pre-treated sewage to the multiple treatment tanks 2 to avoid excessively high or low load on a single tank and to ensure that the treatment efficiency of each treatment tank 2 is consistent. The inlet pipe 4 has a valve at the front end of the treatment tank 2 to control the water inlet of each treatment tank 2, and supplies water to several treatment tanks 2 through the water distributor 3. The contact part between the inlet pipe 4 and the treatment tank 2 is welded and sealed. The treatment tank 2 contains a gravel layer 5. The inlet pipe 4 is inserted into the gravel layer 5. The gravel layer 5 is made of gravel with a particle size of 5-10mm. The surface of the gravel has several permeable holes, which can play a role in the preliminary filtration of suspended particles in the sewage. A pull-out box 9 is installed below the gravel layer 5. A partition steel plate 8 is fixed between the gravel layer 5 and the pull-out box 9. The partition steel plate 8 has several through holes that allow water to pass through. The partition steel plate 8 is firmly fixed inside the treatment tank 2 to support the gravel layer 5. The bottom surface of the pull-out box 9 has several openings for sewage to pass through. A porous ceramsite layer 11 is placed inside the pull-out box 9. Ceramsite with a particle size of 2-5mm and a porosity of ≥50% is selected. The porous ceramsite layer 11 is used to adsorb fine particles and odors in the sewage. An opening is made in the side wall of the treatment tank 2 to facilitate the retrieval and placement of the pull-out box 9. A leak-proof baffle 10 is provided at the outermost end of the pull-out box 9. A sealing ring 15 is installed at the contact part between the leak-proof baffle 10 and the treatment tank 2 to prevent sewage leakage. At the same time, the pull-out box 9 is fixed to the treatment tank 2 by bolts on the leak-proof baffle 10 to prevent the pull-out box 9 from falling out of the treatment tank 2 under the pressure of water. A substrate layer 12 is set below the pull-out box 9. The substrate layer 12 can be one or more of coconut coir, sawdust, and peat moss, which is used to adsorb other impurities in the sewage. A drain pipe 13 is set at the position of the substrate layer 12 in the treatment tank 2 to drain the treated water in the treatment tank 2. A filter screen is installed at the contact part between the drain pipe 13 and the treatment tank 2 to prevent the substrate layer 12 from leaking out. At the same time, a valve is installed on the drain pipe 13 to facilitate the control of water release. A U-shaped tray 6 is placed above the gravel layer 5 and hung on the upper edge of the treatment tank 2. A soil layer 7 is laid inside the tray 6. Several openings for water to pass through are evenly distributed on the bottom surface of the tray 6. The porosity of the soil layer 7 is controlled at 30%-40%. Then, green plants 14 are planted on the soil layer 7. The soil layer 7 absorbs nitrogen and phosphorus substances in the sewage that have not been completely removed by the previous treatment section 1, providing nutrients for the growth of the green plants 14.

[0011] Working principle: In use, select an appropriate number of treatment tanks 2 as needed and install them in different locations. Connect the pretreatment section 1 to several treatment tanks 2 via pipelines and a distributor 3. Insert the inlet pipe 4 into the corresponding treatment tank 2 and weld the connection between the inlet pipe 4 and the treatment tank 2 to prevent sewage leakage. Open the valve at the front end of the inlet pipe 4, and sewage flows from the pretreatment section 1 into the treatment tank 2. At this time, the valve of the drain pipe 13 is closed. The several openings of the inlet pipe 4 facilitate the uniform dispersion of sewage in the gravel layer 5, allowing the gravel layer 5 to perform preliminary filtration of suspended particles in the sewage. The sewage flows through the through holes of the partition steel plate 8 into the porous ceramsite layer 11 of the pull-out box 9. The ceramsite has a particle size of 2-5mm and a porosity of ≥50%, which adsorbs fine particles and odors in the sewage. One or more of the following matrix layers 12—coconut coir, sawdust, and peat moss—are used for adsorption. Other impurities in the water, when the water level in the treatment tank 2 rises to the soil layer 7, the soil layer 7 adsorbs the nitrogen and phosphorus substances in the sewage that were not completely removed by the previous treatment section 1, providing the nutrients needed for the growth of the green plants 14, the valve of the inlet pipe 4 is closed, and the treatment tank 2 is left to process. When sewage treatment is required again, the valve of the drain pipe 13 is opened to discharge the treated sewage in the treatment tank 2. The above process is repeated to achieve multiple treatments of sewage. When the filter material in the treatment tank 2 needs to be replaced, the tray 6 and the soil layer 7 and green plants 14 inside are lifted from the top of the treatment box, the gravel layer 5 on the partition steel plate 8 is replaced, the bolts connecting the leak-proof baffle 10 to the treatment tank 2 are removed, the pull-out box 9 is taken out, the porous ceramsite layer 11 inside is replaced, and the matrix layer 12 is taken out and replaced through the opening after the pull-out box 9 is taken out of the treatment tank 2, thus realizing the replacement of the filter material in the treatment tank 2. In another embodiment, the valves on the inlet pipe 4 and the outlet pipe 13 are electric valves, controlled by a background control unit, reducing manual operation.

[0012] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A green plant treatment structure for wastewater treatment, comprising a pre-treatment unit (1), characterized in that, It also includes several treatment tanks (2) connected to the pre-treatment unit (1) via pipelines. There is a water distributor (3) on the pipeline between the pre-treatment unit (1) and the several treatment tanks (2). Several water inlet pipes (4) are connected to the outlet end of the water distributor (3) and extend into the treatment tank (2). There is a valve at the front end of the water inlet pipe (4) entering the treatment tank (2) to control the water inlet of each treatment tank (2) and supply water to the several treatment tanks (2) through the water distributor (3). There is a gravel layer (5) in the treatment tank (2). The water inlet pipe (4) is inserted into the gravel layer (5). A pull-out box (9) is set below the gravel layer (5). There is a porous ceramsite layer (11) in the pull-out box (9). A matrix layer (12) is set below the pull-out box (9).

2. The green plant treatment structure for sewage treatment according to claim 1, characterized in that, The water inlet pipe (4) has several openings extending into the treatment tank (2). There is a tray (6) above the gravel layer (5). The tray (6) has a U-shaped cross-section and is hung on the upper edge of the treatment tank (2). A soil layer (7) is set inside the tray (6). Several openings for water to pass through are evenly distributed on the bottom surface of the tray (6).

3. The green plant treatment structure for sewage treatment according to claim 2, characterized in that, Green plants (14) are cultivated on the soil layer, and the soil layer (7) adsorbs nitrogen and phosphorus substances in the sewage.

4. The green plant treatment structure for sewage treatment according to claim 3, characterized in that, A partition steel plate (8) is fixed between the gravel layer (5) and the pull-out box (9). The partition steel plate (8) has several through holes that allow water to pass through. The partition steel plate (8) is fixed inside the treatment tank (2).

5. A green plant treatment structure for sewage treatment according to claim 4, characterized in that, The side wall of the treatment tank (2) has an opening, and the outermost end of the pull-out box (9) has a leak-proof baffle (10). The contact part between the leak-proof baffle (10) and the treatment tank (2) has a sealing ring (15). The leak-proof baffle (10) is connected to the treatment tank (2) by bolts.

6. A green plant treatment structure for sewage treatment according to claim 5, characterized in that, The bottom surface of the pull-out box (9) has several openings for sewage to pass through. The porous ceramsite layer (11) is made of ceramsite with a particle size of 2-5 mm and a porosity of ≥50%, which is used to adsorb fine particles and odors in sewage.

7. A green plant treatment structure for sewage treatment according to claim 6, characterized in that, The matrix layer (12) is made of one or more of coconut coir, sawdust, and peat moss.

8. A green plant treatment structure for sewage treatment according to claim 7, characterized in that, A drain pipe (13) is provided at the position of the substrate layer (12) of the treatment tank (2). A filter screen is provided at the contact part between the drain pipe (13) and the treatment tank (2). A valve is provided on the drain pipe (13).

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