CN215712088U - A cascade pond constructed wetland sewage treatment system - Google Patents
A cascade pond constructed wetland sewage treatment system Download PDFInfo
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- CN215712088U CN215712088U CN202122265034.1U CN202122265034U CN215712088U CN 215712088 U CN215712088 U CN 215712088U CN 202122265034 U CN202122265034 U CN 202122265034U CN 215712088 U CN215712088 U CN 215712088U
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Abstract
本实用新型属于污水处理领域，公开了一种梯级叠塘人工湿地污水处理系统，其系统包括自上而下呈阶梯式依次设置的初沉塘、表面流人工湿地、接触氧化塘和涵养塘；初沉塘内种植有沉水植物，表面流人工湿地内种植有挺水植物，接触氧化塘内种植有浮水植物，涵养塘内种植有沉水植物，初沉塘、所述表面流人工湿地、接触氧化塘和涵养塘内均设有多个隔埂，多个所述隔埂用于引导水流呈折线流动。本实用新型通过设置多个隔埂，可使水流均匀推流，不易形成短流，使污水反复多次的经过植物根系，从而增强吸附、沉淀的效果，更为有效地提高污染物的去除效果，实现精细化导流；整个系统的水面高程逐级降低，水流依据自然落差自流进入下一流程，运行能耗低。
The utility model belongs to the field of sewage treatment, and discloses a sewage treatment system for a cascade stacked pond constructed wetland. Submerged plants are planted in the primary sedimentation pond, emergent plants are planted in the surface flow artificial wetland, floating plants are planted in the contact oxidation pond, and submerged plants are planted in the conservation pond. The primary sedimentation pond, the surface flow artificial wetland, and the contact oxidation pond There are a plurality of partition ridges in the pond and the conservation pond, and the plurality of said partition ridges are used to guide the water flow in a broken line. By arranging a plurality of partitions, the utility model can make the water flow evenly push, and it is not easy to form a short flow, so that the sewage passes through the plant root system repeatedly for many times, thereby enhancing the effect of adsorption and precipitation, and more effectively improving the removal effect of pollutants , to achieve refined diversion; the water surface elevation of the entire system is gradually reduced, and the water flow enters the next process according to the natural drop, and the operation energy consumption is low.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, and particularly relates to a step stacked pond constructed wetland sewage treatment system.
Background
With the rapid development of industry and the aggravation of human activities, the water pollution condition is increasingly serious, which greatly influences the life of human beings and makes the task of water environment protection more and more difficult. In addition, the rapid development of cities can not consume water resources, and the water quality of urban rivers is deteriorated due to the fact that a large amount of sewage and domestic wastewater enter the natural environment. Similarly, rural population is numerous and scattered, centralized domestic sewage collecting and treating facilities are lacked, and agricultural non-point source pollution invisibly aggravates water pollution.
In recent years, the water pollution control concept is changed from the prior centralized treatment to the distributed treatment or the on-site treatment. The artificial wetland technology becomes a preferred scheme for sewage treatment due to the advantages of low investment, low manufacturing cost, low operation cost, low maintenance technology content, flexible and various system combinations and the like.
The artificial wetland is a comprehensive ecological system, which applies the principles of species symbiosis and material cycle regeneration in the ecological system and the coordination principle of structure and function, fully exerts the production potential of resources on the premise of promoting the virtuous cycle of pollutants in wastewater, prevents the re-pollution of the environment and obtains the best benefits of sewage treatment and resource utilization. The wetland plants also play an important role in controlling water quality pollution and degrading harmful substances.
However, in the operation process of the traditional artificial wetland, due to the complexity of water power, the situation that water flows freely in the wetland system can occur. The retention time of the sewage to be treated in the wetland is short, so that the improved treatment effect of the artificial wetland system on water cannot be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sewage treatment system for a stepped stacked pond constructed wetland, which has a good sewage treatment effect and low energy consumption.
The technical scheme provided by the utility model is as follows:
a step stacked pond artificial wetland sewage treatment system comprises a primary sedimentation pond, a surface flow artificial wetland, a contact oxidation pond and a conservation pond which are sequentially arranged in a step-type manner from top to bottom; submerged plants are planted in the primary sedimentation pond, emergent aquatic plants are planted in the surface flow artificial wetland, floating plants are planted in the contact oxidation pond, submerged plants are planted in the conserving pond, a plurality of ridges are arranged in the primary sedimentation pond, the surface flow artificial wetland, the contact oxidation pond and the conserving pond, and the ridges are used for guiding water flow to flow in a broken line manner.
Furthermore, the ridges comprise a first ridge and a second ridge, the first ridge is a waterproof ridge, the second ridge comprises a waterproof area and a permeable area, and the permeable areas of the two adjacent second ridges are arranged diagonally and used for guiding water flow to flow in a fold line manner.
Further, the water permeable region comprises a first water permeable region and a second water permeable region;
the first water permeable area is a soil ridge, the height of the first water permeable area is flush with the normal water level, and the slope ratio is 1: 4.5;
the second region of permeating water includes from supreme concrete cushion, concrete bottom plate and the gabion box of setting gradually down.
Furthermore, the surface flow artificial wetland comprises an original soil layer, a waterproof layer, a rubble layer, a soil protection layer and a sandstone layer which are sequentially arranged from bottom to top;
and a sedimentation tank is arranged between the surface flow artificial wetland and the primary sedimentation pond, and the sedimentation tank is communicated with the sand layer of the surface flow artificial wetland through a perforated water distribution pipe.
Further, the particle size of the rubble layer is 10-20mm, the thickness of the soil layer is 30cm, the particle size of the sandstone layer is 4.5mm, and the soil protection layer is of a mesh surface structure made of polyamide monofilament fiber materials.
The system further comprises a first overflow weir, a second overflow weir and a third overflow weir, wherein the first overflow weir is connected with the primary sedimentation pond and the sedimentation pond, the second overflow weir is connected with the surface flow artificial wetland and the contact oxidation pond, and the third overflow weir is connected with the contact oxidation pond and the conservation pond.
Further, the area ratio of the primary sedimentation pond, the surface flow constructed wetland, the contact oxidation pond and the conservation pond is 1:1.5:1: 1.
Further, the submerged plants are watermifoil and hydrilla verticillata, and the planting area ratio of the watermifoil to the hydrilla verticillata is 1: 1; the hydrophytes comprise water shield, water hyacinth, duckweed and water lily, and the planting area proportion is 1:1:1: 1; the emergent aquatic plants comprise reed, allium mongolicum regel, cattail and canna, and the planting area is 1:1:1: 1.
The step stacked pond constructed wetland sewage treatment system provided by the utility model can bring the following beneficial effects:
according to the utility model, the cascade stacked pond is arranged, and the plurality of ridges are arranged in the pond, so that water flow can be pushed uniformly, short flow is not easy to form, and sewage passes through the plant root system repeatedly, thus the adsorption and precipitation effects are enhanced, the pollutant removal effect is improved more effectively, and refined flow guiding is realized; in addition, the whole treatment system gradually reduces the water surface elevation of the whole treatment system according to the fluctuating underwater topography and the controlled water depth, the water flow automatically flows into the next flow according to the natural fall, and the operation energy consumption is low.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a plan view schematically illustrating an artificial wetland sewage treatment system with cascade ponds according to an embodiment of the utility model;
FIG. 2 is a schematic structural view of the constructed wetland sewage treatment system of the step stacked pond shown in FIG. 1;
fig. 3 is a schematic view of the structure of the second bank when the water permeable region is the second water permeable region.
Description of the reference numerals
10. Primarily settling a pond; 20. surface flow constructed wetlands; 21. a crushed stone layer; 22. a soil layer; 23. a sandstone layer; 30. a contact oxidation pond; 40. a conserving pond; 50. a first ridge is separated; 60. a second ridge is separated; 61. a water impervious area; 62. a water permeable region; 621. a first water permeable region; 622. a second water permeable region; 6221. a concrete cushion; 6222. a concrete floor; 6223. a gabion cage; 70. a sedimentation tank; 81. a first overflow weir; 82. a second overflow weir; 83. and a third overflow weir.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the utility model, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
The utility model provides a specific embodiment of a sewage treatment system of an artificial wetland with cascade ponds, which comprises a primary sedimentation pond 10, a surface flow artificial wetland 20, a contact oxidation pond 30 and a culvert pond 40 which are sequentially arranged in a stepped manner from top to bottom as shown in figures 1 and 2.
At the highest position of the 10-position sewage treatment system of the primary sedimentation pond, sewage can be lifted to the primary sedimentation pond 10 through a lifting pump, and a water inlet of the primary sedimentation pond 10 is positioned at the lowest position of the primary sedimentation pond 10 in elevation. Submerged plants are planted in the primary sedimentation pond 10 and are watermifoil, hydrilla verticillata and the like, the submerged plants can remove nutritive salts and organic matter components in eutrophic water body through rhizosphere effect, and microorganisms attached to and growing on root systems of the submerged plants can promote decomposition of pollutants so as to remove part N, P, COD and BOD. In addition, the growth of the submerged plants can improve the content of dissolved oxygen in the wastewater, so that the wastewater is in an aerobic state.
Emergent aquatic plants are planted in the surface flow artificial wetland 20 and are reed, allium mongolicum regel, cattail, canna and the like. The sewage treated by the primary sedimentation pond 10 enters the surface flow artificial wetland 20, and nutrient substances in the sewage are reduced through the root absorption of emergent aquatic plants. The sewage treated by the primary sedimentation pond 10 is in an aerobic state, the metabolism of aerobic microorganisms in the surface flow artificial wetland 20 is greatly enhanced under the condition of oxygen enrichment, and dissolved oxygen in the water body can be fully utilized to reduce nutrients such as nitrogen and phosphorus in the sewage.
The floating plants are planted in the contact oxidation pond 30, the root systems of the plants can effectively reduce pollutants, meanwhile, the root systems can be attached with microorganisms, and the concentration of nutrient substances is reduced through the decomposition effect of the microorganisms. The water-floating plant is water shield, water hyacinth, duckweed, water lily, etc. The contact oxidation pond 30 is a shallow pond, and the floating plants in the contact oxidation pond 30 can intercept suspended matters in the sewage so as to remove the suspended matters in the sewage.
Submerged plants are planted in the conservation pond 40, the submerged plants have strong nitrogen and phosphorus enrichment capacity, nutrient substances in bottom sediment are directly absorbed through root systems, and meanwhile blades can promote suspended matters in water to precipitate and absorb small molecular pollutants. The submerged plant is Foliumet tailer, hydrilla verticillata, etc. Further purifying the sewage by submerged plants.
Plants in the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the conservation pond 40 can be matched and planted according to the colors and sizes of the plants so as to realize harmony and unity of sewage treatment and human living environment.
The whole step stacked pond artificial wetland sewage treatment system removes suspended matters in sewage by utilizing the processes of biological interception, physical sedimentation and the like, removes N, P, COD and other nutrient substances in the sewage by the rhizosphere effect of aquatic plants, and has stable water outlet after being treated by the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the culvert pond 40. The process can treat domestic sewage and be used as landscape.
A plurality of ridges are arranged in the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the culvert pond 40 and are used for dividing each treatment area into a plurality of different habitat conditions and guiding water flow to flow in a broken line.
Through setting up a plurality of ridge separating in pond 10, surface current constructed wetland 20, contact oxidation pond 30 and the culvert pond 40 of sinking, can divide into the cell with each treatment zone, improve rivers zigzag nature, make sewage pass through the plant roots many times repeatedly to the effect of reinforcing absorption, deposit improves the removal effect of pollutant more effectively, realizes the water conservancy diversion that becomes more meticulous.
The ridges comprise a first ridge 50 and a second ridge 60, the first ridge 50 is a waterproof soil ridge, the elevation of the first ridge 50 is 10cm higher than the normal water level, the top width is 0.5m, and the slope ratio is 1: 3.
The second ridge 60 comprises a water-impermeable area 61 and a water-permeable area 62, the water-impermeable area 61 is a water-impermeable soil ridge, the water-permeable area 62 comprises a first water-permeable area 621 and a second water-permeable area 622, the first water-permeable area 621 is a soil ridge, the elevation of the first water-permeable area 621 is level to the normal water level, and the slope ratio is 1: 4.5.
As shown in fig. 3, the second water permeable area 622 includes a concrete pad 6221, a concrete bottom plate 6222 and a gabion cage 6223, which are arranged in this order from bottom to top. The second permeable area 622 uses plain concrete cushion as the bottom cushion, a reinforced concrete bottom plate is laid on the plain concrete cushion, a layer of rustless welded gabion net cage 6223 with 400 x 300mm (width x height) and a layer of rustless welded gabion net cage 6223 with 800 x 300mm (width x height) are placed on the concrete bottom plate, stones with uniform sizes are placed inside the gabion net cage 6223 for water flow permeation, the trend of water flow in the guide area is guided, a layer of yellow stones with the thickness of 300mm are laid on the upper portion of the gabion net cage 6223 in consideration of landscape effect, and the top elevation is set according to the normal water level of each functional area.
And a reinforced concrete bottom plate with the width of 1.0m is arranged at the bottom of each ridge to serve as a foundation. The ridges are formed by assembling waterproof ridges and different types of permeable ridges, and the permeable areas of two adjacent ridges are arranged on diagonal lines to guide the flow of water flow in broken lines, thereby effectively prolonging the hydraulic retention time and avoiding short flow.
The surface flow artificial wetland 20 comprises an original soil layer, a waterproof layer, a rubble layer 21, a soil layer 22, a soil protection layer and a sandstone layer 23 which are arranged in sequence from bottom to top; the waterproof layer adopts clay tamp, and soil horizon 22 is planting soil, covers the soil protection layer above soil horizon 22, and the soil protection layer is covered with gravel layer 23 by polyamide monofilament fiber material establishment winding's network face structure, soil protection layer.
A sedimentation tank 70 is arranged between the surface flow artificial wetland 20 and the primary sedimentation tank 10, and the sedimentation tank 70 is communicated with the sandstone layer 23 of the surface flow artificial wetland 20 through a perforated water distribution pipe. The particle size of the gravel layer 21 is 10-20mm, the thickness of the soil layer 22 is 30cm, and the particle size of the sandstone layer 23 is 4.5 mm.
Further, the system comprises a first overflow weir 81, a second overflow weir 82 and a third overflow weir 83, wherein the first overflow weir 81 is connected with the primary sedimentation tank 10 and the sedimentation tank 70, the second overflow weir 82 is connected with the surface flow constructed wetland 20 and the contact oxidation tank 30, and the third overflow weir 83 is connected with the contact oxidation tank 30 and the culvert 40.
Submerged plants such as watermifoil, hydrilla verticillata and the like are planted on the surface of the primary sedimentation pond 10, and the ratio of planting areas is controlled to be 1:1. N, P, COD and BOD after part of sewage is removed through the primary sedimentation tank 10, and after the menstrual flow sewage is enriched with oxygen, the effluent enters the sedimentation tank 70 through the water diversion overflow weir, and large particles are removed through the sedimentation tank 70, so that the perforated water distribution pipe and the internal structure of the wetland are prevented from being blocked by the large particles during subsequent treatment, and the plant growth is prevented from being influenced by the large particles.
The sewage precipitated by the sedimentation tank 70 enters the perforated water distribution pipes of the surface artificial wetland 20 along the triangular weir, after uniform water distribution, the sewage is deeply treated by infiltration of a plant root system and a packing layer, and the packing layer is sequentially provided with a gravel layer 21 with uniform thickness and particle size of 10-20mm, a soil layer 22 with thickness of 30cm and a gravel layer 23 with particle size of 4.5mm from bottom to top.
The surface flow constructed wetland 20 mainly comprises emergent aquatic plants such as reeds, allium mongolicum regel, cattail, canna and the like, and the planting area is 1:1:1:1, wherein the reeds are planted on one side close to the primary sedimentation pond 10, the allium mongolicum regel is planted on one side close to the contact oxidation pond 30, the cattail is planted on one side close to the center of the river channel, the canna is planted in the center, and the canna are planted from inside to outside in sequence according to the height sequence of the plants and keep symmetry to form a landscape.
The sewage treated by the surface flow artificial wetland 20 automatically flows into the contact oxidation pond 30 along the water diversion overflow weir, the contact oxidation pond 30 mainly comprises the water plants of brasenia schreberi, water hyacinth, duckweed and water lily, the planting area is 1:1:1:1, wherein the water hyacinth and the water lily are planted at the central position, the brasenia schreberi and the water lily are planted around the water hyacinth and the water lily, and the plant height is staggered, so that an ornamental landscape is formed. After the contact oxidation pond 30 is subjected to deep treatment, the effluent automatically flows into the conservation pond 40 along the water diversion overflow weir, and the conservation pond 40 mainly comprises submerged plants.
The areas of the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the culvert pond 40 are designed according to the ratio of 1:1.5:1:1, and the specific size can be adjusted according to the topographic characteristics of the construction site.
The water inlet area of the primary sedimentation pond 10 can be selected at the lowest position of the ground elevation according to the terrain, the water depth of the primary sedimentation pond 10 is controlled to be about 0.9m, a thick soil layer and a gravel filler can be filled according to the actual situation, the water surface elevation of the whole system stably descends, and the water depth of the surface flow constructed wetland 20 is controlled to be about 0.3 m. The elevation of the inlet position of the whole wetland sewage treatment system is the lowest, and the wetland is continuously changed on the flat and the cross section by constructing the fluctuating underwater topography and controlling the depth of the wetland water by utilizing the topography transformation mode of means such as dike depth pool and the like.
The beneficial effect of this embodiment does:
(1) according to the design of the utility model, by referring to relevant theories and technologies of hydraulic engineering, ecological engineering and the like, the sewage is creatively lifted and enters a treatment system, suspended matters in the sewage are removed by utilizing the processes of biological interception, physical sedimentation and the like, nutrient substances such as N, P, COD and the like in the sewage are removed through the rhizosphere effect of aquatic plants, and the effluent is stable after the treatment of the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the conservation pond 40. The process can treat domestic sewage and be used as landscape.
(2) The utility model only needs to consume power when lifting the sewage to the wetland treatment system, the whole treatment system gradually reduces the water surface elevation of the whole treatment system according to the fluctuating underwater topography and the controlled water depth, the water flow automatically flows into the next flow according to the natural fall, and the operation energy consumption is low.
(3) The daily management work of the constructed cascade pond constructed artificial wetland system mainly comprises the management and operation of a pump station, the regular pruning, harvesting and the like of plants of a treatment system, and the like, which are all single, and the required personnel and cost are lower, so that the management is simple and the operation cost is low.
(4) The whole sewage treatment process of the utility model does not add any chemical agent, and the whole system is matched with various aquatic plants to build a good ecological environment, so that the utility model can be used for the leisure and entertainment of citizens and has good social benefit and ecological environmental benefit.
The utility model relates to a sewage treatment method of a sewage treatment system of a stepped stacked pond constructed wetland, which comprises the following steps:
the sewage is lifted by a lifting pump to enter the primary sedimentation pond 10, flows in a broken line in the primary sedimentation pond 10 through ridge separation, and is primarily purified by the submerged plants in the primary sedimentation pond 10;
the sewage purified by the primary sedimentation pond 10 enters the surface flow artificial wetland 20, flows in a broken line in the surface flow artificial wetland 20 through ridges, and pollutants in the sewage are removed through emergent aquatic plants in the surface flow artificial wetland 20;
the sewage treated by the surface flow artificial wetland 20 enters the contact oxidation pond 30, flows in a broken line in the contact oxidation pond 30 through ridge separation, and intercepts suspended matters in the sewage through floating plants in the contact oxidation pond 30;
the sewage treated by the contact oxidation pond 30 is treated by a conservation pond 40, flows in a broken line in the conservation pond 40 through ridge separation, and is deeply purified by submerged plants in the conservation pond 40.
The sewage purified by the primary sedimentation pond 10 enters the surface flow constructed wetland 20, and the removal of pollutants in the sewage by emergent aquatic plants in the surface flow constructed wetland 20 specifically comprises the following steps:
the sewage purified by the primary sedimentation pond 10 enters a sedimentation tank 70 for sedimentation;
the sewage after precipitation enters the surface flow artificial wetland 20 through a perforated water distribution pipe;
pollutants in the sewage are removed through emergent aquatic plants in the surface flow artificial wetland 20.
The operation mode of the step stacked pond constructed wetland sewage treatment system of the embodiment is as follows:
1. waste water collection and pretreatment: the wastewater is lifted to a primary sedimentation pond 10 in the wastewater treatment system by a lift pump, the primary sedimentation pond 10 can be planted with submerged plants such as watermifoil, hydrilla verticillata and the like, the submerged plants can remove nutrient salts and organic matter components in eutrophic water body by rhizosphere effect, and simultaneously, microorganisms growing on the root system of the submerged plants adhere to the root system of the submerged plants, so that the decomposition of pollutants is promoted, and part N, P, COD and BOD are removed. In addition, the growth of the submerged plants can improve the content of dissolved oxygen in the wastewater, so that the wastewater is in an aerobic state when entering the next flow;
2. deep treatment: the sewage treated by the primary sedimentation pond 10 enters the water inlet area of the surface flow artificial wetland 20, and enters the surface flow artificial wetland 20 after being distributed by the outlet of the sedimentation tank 70. The surface flow artificial wetland 20 is sequentially provided with a raw soil layer with uniform thickness, a waterproof layer, a gravel layer 21 with the grain diameter of 10-20mm, a soil layer 22 with the thickness of about 30cm and a sandstone layer 23 with the grain diameter of 4.5mm from bottom to top. The waterproof layer is tamped by clay, the soil layer 22 is planting soil, a soil protection blanket covers above the soil layer 22, the soil protection blanket is of a net surface structure formed by weaving and winding polyamide monofilament fiber materials, the surface flow constructed wetland 20 can be used for planting emergent aquatic plants such as reed, allium mongolicum regel, cattail, canna and the like, and the bottom of the surface flow constructed wetland is collected to the water collecting tank by a perforated pipe. After being treated by the surface flow artificial wetland 20, the sewage enters the contact oxidation pond 30 through the overflow weir, the contact oxidation pond 30 is a shallow pond and mainly comprises floating plants, and the floating plants can intercept suspended matters in the sewage. The sewage of the contact oxidation pond 30 enters a conservation pond 40 after being treated, and submerged plants are planted in the conservation pond 40.
3. High water level operation: in the utility model, sewage to be treated is introduced into the center of a wetland system through a lifting pump, the center of the system is the lowest bottom elevation, the wetland is built into a stacked pond form with gradually-reduced water level height by the aid of the fluctuant underwater topography and the control of the depth of the wetland, and the high-water-level river wastewater can be restored under the condition that a multi-pond system is submerged in a flood season.
4. Surface flow constructed wetland: for the surface artificial wetland, the borne pollution load is limited, and the treatment effect is often poor. The present invention solves this problem by the following two aspects: firstly, the primary sedimentation pond 10 effectively reduces organic matters through the root absorption of submerged plants, and simultaneously ensures that sewage is in an aerobic state when entering the surface flow constructed wetland 20, thereby improving the action efficiency of aerobic microorganisms in the surface flow constructed wetland 20; secondly, on the basis of the traditional surface flow artificial wetland, ridges are built to improve the water flow tortuosity, so that the sewage repeatedly passes through the plant root system, the adsorption and sedimentation effects are enhanced, and the pollutant removal effect is improved more effectively. The ridge separation is divided into a waterproof ridge and a permeable ridge, the waterproof ridge and the permeable ridge are connected to separate the processing units, and permeable areas of two adjacent ridges are in diagonal positions to form a broken line type to guide water flow.
5. And (3) ecological landscape configuration: the primary sedimentation pond 10, the surface flow artificial wetland 20, the contact oxidation pond 30 and the conservation pond 40 relate to 5-10 aquatic plants, including submerged plants of foxtail algae, black algae, emergent aquatic plants of reed, allium mongolicum regel, cattail, canna, and floating plants of brasenia schreberi, water hyacinth, duckweed, water lily and the like, and are planted in a matching way according to the color of the plants, the size of the plants and the growing season, so that the harmony and unification of waste sewage treatment and human living environment are realized.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A step stacked pond artificial wetland sewage treatment system is characterized by comprising a primary sedimentation pond, a surface flow artificial wetland, a contact oxidation pond and a conservation pond which are sequentially arranged in a step-type manner from top to bottom; submerged plants are planted in the primary sedimentation pond, emergent aquatic plants are planted in the surface flow artificial wetland, floating plants are planted in the contact oxidation pond, submerged plants are planted in the conserving pond, a plurality of ridges are arranged in the primary sedimentation pond, the surface flow artificial wetland, the contact oxidation pond and the conserving pond, and the ridges are used for guiding water flow to flow in a broken line manner.
2. The sewage treatment system of the stepped stacked pond constructed wetland of claim 1, wherein the ridges comprise a first ridge and a second ridge, the first ridge is a waterproof ridge, the second ridge comprises a waterproof region and a permeable region, and the permeable regions of two adjacent second ridges are arranged diagonally and used for guiding water flow to flow in a broken line.
3. The sewage treatment system of the artificial wetland in the cascade pond as claimed in claim 2,
the water permeable region comprises a first water permeable region and a second water permeable region;
the first water permeable area is a soil ridge, the height of the first water permeable area is flush with the normal water level, and the slope ratio is 1: 4.5;
the second region of permeating water includes from supreme concrete cushion, concrete bottom plate and the gabion box of setting gradually down.
4. The sewage treatment system of the artificial wetland in the cascade pond as claimed in claim 1,
the surface flow constructed wetland comprises an original soil layer, a waterproof layer, a rubble layer, a soil protection layer and a sandstone layer which are sequentially arranged from bottom to top;
and a sedimentation tank is arranged between the surface flow artificial wetland and the primary sedimentation pond, and the sedimentation tank is communicated with the sand layer of the surface flow artificial wetland through a perforated water distribution pipe.
5. The sewage treatment system of the artificial wetland in the cascade pond as claimed in claim 4,
the particle size of the rubble layer is 10-20mm, the thickness of the soil layer is 30cm, the particle size of the sandstone layer is 4.5mm, and the soil protection layer is of a net surface structure made of polyamide monofilament fiber materials.
6. The sewage treatment system of the stepped stacked-pond artificial wetland of claim 4, further comprising a first overflow weir connecting the primary pond and the sedimentation tank, a second overflow weir connecting the surface-flow artificial wetland and the contact oxidation pond, and a third overflow weir connecting the contact oxidation pond and the culvert.
7. The stepped stacked-pond artificial wetland sewage treatment system according to claim 1, wherein the area ratio of the primary pond, the surface-flow artificial wetland, the contact oxidation pond and the conservation pond is 1:1.5:1: 1.
8. The sewage treatment system for the stepped stacked pond constructed wetlands according to claim 1, wherein the submerged plants are watermifoil and hydrilla verticillata, and the planting area ratio of the watermifoil to the hydrilla verticillata is 1: 1; the hydrophytes comprise water shield, water hyacinth, duckweed and water lily, and the planting area proportion is 1:1:1: 1; the emergent aquatic plants comprise reed, allium mongolicum regel, cattail and canna, and the planting area is 1:1:1: 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122265034.1U CN215712088U (en) | 2021-09-17 | 2021-09-17 | A cascade pond constructed wetland sewage treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122265034.1U CN215712088U (en) | 2021-09-17 | 2021-09-17 | A cascade pond constructed wetland sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116161795A (en) * | 2022-12-16 | 2023-05-26 | 河南省城乡建筑设计院有限公司 | A Composite Constructed Wetland Tail Water Treatment System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116161795A (en) * | 2022-12-16 | 2023-05-26 | 河南省城乡建筑设计院有限公司 | A Composite Constructed Wetland Tail Water Treatment System |
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