CN211813693U - Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland - Google Patents
Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland Download PDFInfo
- Publication number
- CN211813693U CN211813693U CN202020157573.6U CN202020157573U CN211813693U CN 211813693 U CN211813693 U CN 211813693U CN 202020157573 U CN202020157573 U CN 202020157573U CN 211813693 U CN211813693 U CN 211813693U
- Authority
- CN
- China
- Prior art keywords
- unit
- anaerobic
- artificial wetland
- aerobic
- anoxic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a multistage oxygen deficiency-anaerobism-good oxygen integration composite artificial wetland, the main bed body including artificial wetland, the main bed body transversely divide into first region, the second is regional, the main bed body comprises the processing unit of three difference, be aerobic treatment unit respectively, the oxygen deficiency processing unit, anaerobic treatment unit, first region or second are regional by two upper and lower processing units constitution, be respectively processing unit, lower processing unit is anaerobic treatment unit, it is anaerobic treatment unit or oxygen deficiency processing unit to go up processing unit, sewage gets into from the regional higher region of the bed body height in first region or second, it communicates with each other between upper unit and the anaerobic treatment unit, the bottom in first region or second region communicates with each other. Emergent aquatic plants, submerged plants and floating plants are planted in the aerobic unit at the same time. Thereby leading the nitrification-denitrification effect and the biological phosphorus removal effect of the microorganisms to be more thorough, reducing the content of nitrogen and phosphorus in the effluent and improving the quality of the effluent.
Description
Technical Field
The utility model belongs to the technical field of sewage ecological purification, concretely relates to multistage oxygen deficiency-anaerobism-good oxygen integration composite constructed wetland.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The artificial wetland technology has outstanding advantages in the non-point source pollution treatment of the watershed of developing countries and regions, and has been widely used in the fields of domestic sewage and industrial wastewater treatment, river and lake treatment, ecological restoration and the like due to the advantages of convenient management, low consumption, high efficiency and the like. The artificial wetland system is an artificially constructed, controllable and engineered wetland system. The system is a complete ecological system, fully exerts the production potential of resources by forming good internal circulation, obtains the best benefits of sewage treatment and resource utilization, and realizes better economic and ecological benefits. The artificial wetland has low technical investment and operating cost, and also has the advantages of simple operation, good effluent quality, strong impact resistance, capability of improving and beautifying the ecological environment and the like, thereby having extremely wide application prospect.
Improving the nitrogen and phosphorus removal is the core problem of the improvement of the current water treatment technology, further improves the nitrogen and phosphorus removal capability of the artificial wetland system, and has important significance for ensuring the water environment quality of downstream water bodies. The review analysis of the artificial wetland shows that the average removal efficiency of the surface flow artificial wetland system on the total nitrogen is less than 50%, and when the temperature is reduced in winter or the carbon-nitrogen ratio of inlet water is reduced, the nitrogen removal rate of the system is further reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model aims to provide a multistage anoxic-anaerobic-aerobic integrated composite artificial wetland.
In order to solve the technical problem, the technical scheme of the utility model is that:
a multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland comprises a main bed body of the artificial wetland, wherein the main bed body is transversely divided into a first area and a second area, the main bed body consists of three different treatment units, namely an aerobic treatment unit, an anoxic treatment unit and an anaerobic treatment unit, the first area or the second area consists of an upper treatment unit and a lower treatment unit, the lower treatment unit is an anaerobic treatment unit, the upper treatment unit is an anaerobic treatment unit or an anoxic treatment unit, sewage enters from an area with a higher bed body height in the first area or the second area, the upper unit is communicated with the anaerobic unit, a water outlet is positioned in the other adjacent area, and the bottoms of the first area or the second area are communicated.
The utility model discloses well innovation has designed composite construction's constructed wetland, with bed body dissolved oxygen content divide into good oxygen, oxygen deficiency, the three gradient of anaerobism, and build out regional oxygen gradient district to realize the tertiary wetland microsystem of the different gradients of dissolved oxygen along the journey through water conservancy, thereby make nitrifying-denitrification, the biological dephosphorization of microorganism carry out more thoroughly, with the content that reduces nitrogen phosphorus in the play water, improve the play water quality. Compared with the existing artificial wetland, the positions of the anoxic bed body, the aerobic bed body and the anaerobic bed body are reasonably distributed, the cooperative work is realized, the treatment effect is improved,
the utility model discloses well overall structure arrange the division that does benefit to each processing unit population, guarantee complete denitrogenation route, it is better to get rid of the effect.
The utility model discloses in realize that dissolved oxygen gradient changes and realize that the nitrification-denitrification of microorganism, biological dephosphorization effect go on and more thorough key technology point for through plant planting and the inside unit design of system, construct the processing unit of oxygen deficiency-anaerobism-good oxygen to can provide suitable condition separately for the nitrobacteria, the denitrifying bacteria, the phosphorus-accumulating bacteria that need different dissolved oxygen environment, effectively promote system nitrogen and phosphorus removal effect.
As some embodiments of the utility model, the good oxygen unit sets up to surface current constructed wetland unit, and the lower part in the good oxygen unit comprises the gravel, and the middle part is the soil horizon, and upper portion is the water layer, and the diameter of gravel layer from top to bottom increases in proper order. The surface flow constructed wetland unit is an constructed wetland type with water flowing on the surface layer, various wetland plants can be planted in the system, sewage slowly flows in the aerobic unit, and the surface flow constructed wetland unit is arranged to improve the dissolved oxygen level in the system and realize the aerobic condition in the system by matching the plants, increasing the plant planting density and combining the atmospheric reoxygenation process of the surface water body.
As some embodiments of the present invention, the length to width ratio of the aerobic unit is 3: 1-5: 1. the specification of the aerobic unit influences the retention time and hydraulic conditions of the sewage of the aerobic unit, reduces the formation of dead zones and slow flow zones, and enables the dissolved oxygen level in the system to be more balanced.
As some embodiments of the utility model, emergent aquatic plants, submerged plants and floating plants are planted in the aerobic unit at the same time, and potamogeton crispus, waterweed and the like are planted in seasons with lower temperature. Preferably, reed, cattail, allium fistulosum, hornwort, hydrilla verticillata, duckweed, eichhornia crassipes, water lily and the like; preferably, the planting density of emergent aquatic plants is 10-25 plants/m2(ii) a Preferably, the planting density of the floating plants and the submerged plants is 3-10 plants/m2。
As some embodiments of the present invention, the hydraulic slope of the aerobic unit is less than 0.5%.
As some embodiments of the utility model, the oxygen deficiency unit is horizontal undercurrent type constructed wetland unit, and the lower part of oxygen deficiency unit is the gravel layer, and upper portion is the soil horizon, and the diameter of gravel from top to bottom increases in proper order on the gravel layer, and water flows below the unit matrix surface.
As some embodiments of the present invention, the aspect ratio of the anoxic unit is 2: 1-3: 1, the depth is 0.4-1.0 m.
As some embodiments of the present invention, the hydraulic gradient of the anoxic unit is 0.5% to 1%. The reason for the hydraulic gradient design of the anoxic unit and the aerobic unit is to optimize the hydraulic condition in the system, avoid short flow dead zones and avoid wetland blockage.
As some embodiments of the utility model, the oxygen deficiency unit plants emergent aquatic plants, emergent aquatic plants are plants with smaller roots and weaker oxygen secretion capacity, such as calamus, zizania latifolia and cress, and the planting density is properly reduced, 5-10 plants/m2。
As some embodiments of the utility model, the anaerobic unit is composed of coarse gravel, and the hydraulic gradient of the anaerobic unit is 2% -5% and above. The purpose of arranging the coarse gravels in the anaerobic unit is that the porosity of a coarse gravel layer is large, plants are not planted, pollutants are removed mainly through an anaerobic biomembrane loaded on the surface of the gravels, and sewage flowing from the anoxic unit or the aerobic unit is subjected to anaerobic treatment, so that the large porosity can provide more anaerobic reaction space, and the blockage of a wetland system caused by the biomembrane enrichment process is avoided.
As some embodiments of the utility model, a unit clapboard is arranged between the anaerobic unit and the upper treatment unit, the unit clapboard is a wave plate, and the anaerobic unit is communicated with the upper treatment unit through a water port on one side of the unit clapboard. Preferably, the cell separator is made of a material such as stainless steel, tetrafluoroethylene, or ultra-high molecular weight polyethylene. The unit partition board is made of a material which is not easy to corrode, resistant to low temperature and high in rigidity, and the surface of the unit partition board has certain roughness. The anaerobic unit is not completely communicated with the upper treatment unit, and can play a role in separating two treatment areas through isolation.
As some embodiments of the utility model, set up the partition wall between anaerobism unit and the last processing unit, the partition wall is concrete or masonry structure, and the partition wall seals anaerobism unit and last processing unit completely, goes up processing unit and communicates with each other through the gap directly with the anaerobism unit, and the gap is located processing unit's lateral wall. Sewage enters the anaerobic unit through the overflow port.
As some implementation modes of the utility model, an impermeable and waterproof layer is laid at the bottom of the artificial wetland main bed body, and the impermeable and waterproof layer is sequentially provided with large-particle-size gravel, small-particle-size gravel, sandy soil and field soil from bottom to top; preferably, the construction ratio of the large-particle-size gravel, the small-particle-size gravel, the sand and the field soil is 1: 1: 1: 1.5-2.5.
The utility model discloses the setting of well anaerobism, oxygen deficiency, good oxygen unit inner structure and the planting density of plant all influence the reproduction of the content of oxygen and bacterium, biological denitrogenation and dephosphorization route. The utility model discloses the people utilizes foretell compound constructed wetland, compares in current arrangement mode, and biological denitrification rate improves 30 ~ 50%, and the dephosphorization rate improves 20 ~ 40%.
The utility model has the advantages that:
1. by controlling the plant species and the planting density, the three-dimensional combined structure of different types of wetlands is realized, and different dissolved oxygen zones are separated.
2. Each dissolved oxygen subregion can satisfy the requirement of different function microorganism to metabolic environment, compares traditional constructed wetland, and its population of microorganism is abundanter, and the quantity is more, and the dominant population that every subregion corresponds can exert the advantage respectively in the pollutant removal process.
3. Compared with the traditional wetland, the device has the advantages that the device is provided with the treatment units aiming at the nitrification and denitrification processes, so that a complete biological denitrification path can be ensured, the nitrogen removal efficiency is higher, and the removal is more thorough and stable.
4. The preposed anoxic wetland unit is used for treating residual organic matters, metabolic intermediate products and micromolecule organic products thereof, and can provide a carbon source for the denitrification of the subsequent anaerobic treatment unit, so that an external carbon source is not needed, and the smooth proceeding of the denitrification can be ensured.
5. The system has high integration degree, good three-dimensional property, good landscape effect, good treatment effect and better environmental and economic values, and can carry out various deformations according to the terrain and the terrain.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention unduly.
FIG. 1 is a sectional view of a multi-stage anoxic-anaerobic-aerobic integrated composite wetland in example 1;
FIG. 2 is a top view of the multi-stage anoxic-anaerobic-aerobic integrated composite wetland of example 1;
FIG. 3 is a schematic view of a cell separator;
FIG. 4 is a schematic cross-sectional view of a second embodiment of the multi-stage anoxic-anaerobic-aerobic integrated composite wetland of embodiment 2;
fig. 5 is a schematic top view of a second embodiment of the multi-stage anoxic-anaerobic-aerobic integrated composite wetland of embodiment 2;
FIG. 6 is a schematic cross-sectional view of the multi-stage anoxic-anaerobic-aerobic integrated composite wetland in example 3;
wherein, 1, a water inlet; 2. a wetland substrate; 3. a cell partition; 4. emerging plants; 5. submerged plants; 6. floating the plant; 7. a water outlet; 8. an overflow port; 9. a water outlet of the aerobic unit; 10. and (4) an effluent water storage tank.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As described in the background art, the existing artificial wetland has low denitrification rate, and the biological denitrification depends on the nitrification and denitrification processes of microorganisms. The nitrification process is carried out in an aerobic environment, and nitrifying bacteria convert ammonia nitrogen in water into nitrite nitrogen and further into nitrate nitrogen in the own metabolic process; the denitrification process relies on denitrifying bacteria to gradually convert nitrate nitrogen to nitrogen under anoxic or anaerobic conditions, thereby removing nitrogen from the system. The biological phosphorus removal is completed by the aerobic phosphorus release and anaerobic phosphorus absorption processes of phosphorus accumulating bacteria. In the artificial wetland system, the main sources of oxygen comprise oxygen enrichment in the atmosphere and oxygen secretion from the root system of plants, the oxygen enrichment in the atmosphere and the oxygen secretion from the root system of plants are not obvious in the division of dissolved oxygen, the denitrification process is easily inhibited, and the removal of phosphorus by the oxygen enrichment in the artificial wetland system cannot depend on the biological characteristics of phosphorus accumulating bacteria, but more removal effects are achieved through the adsorption of a matrix and the absorption of plants.
The utility model discloses an artifical subregion technique divides the bed body oxygen gradient district, through the gradient change of dissolved oxygen, makes each region of oxygen deficiency-anaerobism-good oxygen suit the growth of different function microorganism respectively to promote going on of biological denitrogenation and biological dephosphorization process, further improve system's play water quality of water.
The present invention will be further explained with reference to the following examples
The first embodiment is as follows:
as shown in fig. 1 and 2, the multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland has the structure that: the upper treatment unit above the anaerobic unit is an anoxic unit, and the aerobic unit is positioned in the other transverse area. The water inlet is communicated with the bottom of the aerobic unit through the anoxic unit.
The sewage enters an anoxic biological unit through a water inlet 1 after passing through a water distribution system, and the unit is a horizontal subsurface flow constructed wetland system and is longThe width ratio is 2.5: 1, depth of 0.6m and hydraulic gradient of 0.7 percent. Planting emergent aquatic plant 4 such as herba Oenanthes Javanicae at a planting density of 5 plants/m2. The wetland internal matrix 2 is sequentially increased in matrix particle size from top to bottom. The concentration of dissolved oxygen in the unit is low, organic matters in the sewage are partially removed through aerobic decomposition of microorganisms, adsorption and absorption of plants and adsorption and interception of fillers, some macromolecular organic matters are degraded into micromolecular organic matters, and meanwhile, an ammoniation and nitration process of nitrogen-containing substances is carried out.
The treated sewage flows into the anaerobic unit from the tail end of the anoxic wetland unit along the unit partition plate 3. Plants are not arranged in the anaerobic unit, the hydraulic gradient is 3%, the substrates are all arranged into gravels with large particle sizes, and a certain amount of anaerobic microorganisms grow on the surfaces of the gravels. As the sewage passes through the biological reaction process of the anoxic unit, the molecular dissolved oxygen in the water is completely exhausted, and the area below the unit partition plate does not contain oxygen enriched by atmosphere and oxygen secreted by the plant root system, thereby forming a complete anaerobic area. The denitrifying bacteria utilize the nitrified products of the anoxic wetland unit and incompletely degraded organic matters as carbon sources to perform denitrification, finally generate nitrogen and finish the removal of the nitrogen. In the unit, an anaerobic phosphorus release process of phosphorus accumulating bacteria is also carried out, and the phosphorus accumulating bacteria release inorganic phosphorus generated by metabolism into the water body and move with water flow to enter the next unit while absorbing and utilizing energy substances required by organic phosphorus in the water body to synthesize cells. The unit partition plates 3 are made of polyethylene with ultrahigh molecular weight, the thickness is 2cm, and gullies are formed in the surfaces of the unit partition plates to increase the roughness, so that the unit partition plates are easy to hang membranes to enhance the water quality purification effect.
The wastewater then enters an aerobic unit with an aspect ratio of 4: 1, the hydraulic gradient is 0.4%, the water depth is 0.4m, emergent aquatic plants 4 such as reed and cattail, submerged plants 5 such as hornwort and hydrilla verticillata, floating plants 6 such as water hyacinth and water lily are planted in the aerobic unit at the same time, and the planting density of the emergent aquatic plants is 25 plants/m2The planting density of the floating plants and the submerged plants is 10 plants/m2. In the unit, the dissolved oxygen level in the system is higher due to the atmospheric reoxygenation function on the surface of the water body and the oxygen excretion function of the root system of the plant, and the wetland is present in the positionMany aerobic bacteria can further carry out aerobic biodegradation to sewage, get rid of the remaining organic matter in the sewage, and this unit plant density of planting is higher simultaneously, and the vegetation process needs a large amount of nitrogen phosphorus nutrients, and the inorganic phosphorus of anaerobism unit release is absorbed by the plant here to the phosphorus concentration in the water has been reduced simultaneously. The treated water is finally discharged from the water outlet 7.
The biological denitrification rate of the sewage is 85-95%, and the phosphorus removal rate is 85-95%.
Example two:
as shown in fig. 4 and 5, the second embodiment is different from the first embodiment in the construction of the anaerobic unit, and the anaerobic unit is formed by the three-dimensional structure of the wetland without using the unit partition plate. The aerobic unit is arranged above the anaerobic unit, and the anoxic unit is positioned in the other transverse area. The water inlet is communicated with the anaerobic unit through the overflow port.
The sewage enters the anoxic biological unit through the water inlet 1 after passing through the water distribution system. After being subjected to anoxic biological treatment, the sewage continuously flows into the anaerobic unit, the substrates of the anaerobic unit are all set to be large-particle-size gravels, and a certain amount of anaerobic microorganisms grow on the surfaces of the large-particle-size gravels. And carrying out metabolic conversion and removal processes on pollutants in the anaerobic unit. The treated effluent enters the aerobic unit through an overflow port 8 at the side of the anaerobic unit. The aerobic unit can further carry out aerobic biodegradation on the sewage to remove residual organic matters in the sewage, and meanwhile, the plant planting density of the unit is higher, a large amount of nitrogen and phosphorus nutrient substances are needed in the plant growth process, and inorganic phosphorus released by the anaerobic unit is absorbed by plants, so that the phosphorus concentration in the water body is reduced simultaneously. The treated water enters an effluent water storage tank 10 through an aerobic unit water outlet 9 and is finally discharged.
The biological denitrification rate of the sewage is 85-95%, and the phosphorus removal rate is 85-95%.
Example three:
as shown in fig. 6, the third embodiment is constructed in such a manner that the aerobic unit is disposed above the anaerobic unit and the anoxic unit is disposed in another transverse region. The water inlet is communicated with the aerobic unit through the overflow port. Is suitable for the treatment process of high-concentration wastewater. When the concentration of inlet water is higher, the front end of the anoxic unit in the water flow direction is arranged, so that the anaerobic effect of the anoxic unit is easily caused, the system is seriously decomposed, the removal effect is reduced, and the landscape effect of the system is influenced. The good oxygen section sets up at foremost, and the dissolved oxygen level is higher in the system, and good oxygen microorganism is abundant, and plant planting density is high, can at first get rid of a large amount of organic matters in the sewage through the effect of good oxygen process and plant and can not take place to become rotten anaerobism, gets rid of the carbon source of remaining organic matter after still can regard as follow-up anaerobism unit, oxygen deficiency unit, further gets rid of the pollutant thoroughly through follow-up unit.
The high-concentration wastewater firstly enters an aerobic unit, an aerobic biodegradation process of organic matters and an ammoniation and nitration process of nitrogen-containing organic matters occur firstly, a certain amount of organic carbon sources are still contained in the water body after the wastewater is treated by an aerobic section due to the high concentration of the organic matters in the wastewater, the requirements of the subsequent denitrification and anaerobic phosphorus release processes of an anaerobic unit on the carbon sources can be met, and the treated wastewater enters an anoxic section to further finish the removal process of residual organic matters and nitrogen and phosphorus.
The biological denitrification rate of the sewage is 80-90%, and the phosphorus removal rate is 80-90%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. A multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland is characterized in that: the artificial wetland comprises a main bed body of the artificial wetland, wherein the main bed body is transversely divided into a first area and a second area, the main bed body consists of three different treatment units, namely an aerobic treatment unit, an anoxic treatment unit and an anaerobic treatment unit, the first area or the second area consists of an upper treatment unit and a lower treatment unit, the upper treatment unit and the lower treatment unit are respectively, the lower treatment unit is the anaerobic treatment unit, the upper treatment unit is the anaerobic treatment unit or the anoxic treatment unit, sewage enters from an area with higher bed body height of the first area or the second area, the upper unit is communicated with the anaerobic unit, a water outlet is positioned in the other adjacent area, and the bottoms of the first area or the second area are communicated.
2. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: the aerobic unit is arranged as a surface flow artificial wetland unit, the lower part in the aerobic unit consists of gravels, the middle part is a soil layer, the upper part is a water layer, and the diameters of the gravels from top to bottom are sequentially increased;
or, the aspect ratio of the aerobic unit is 3: 1-5: 1.
3. the multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: emergent aquatic plants, submerged plants and floating plants are simultaneously planted in the aerobic unit, and water caltrop and waterweed are planted in seasons with lower temperature.
4. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 3, characterized in that: the plant is selected from Phragmites communis, Typha orientalis, Scirpus validus, Goldfish algae, hydrilla verticillata, herba Spirodelae, Eichhornia crassipes, and flos Nymphaeae.
5. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 3, characterized in that: the planting density of emergent aquatic plants is 10-25 plants/m2。
6. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 3, characterized in that: the planting density of the floating plants and the submerged plants is 3-10 plants/m2。
7. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: the hydraulic gradient of the aerobic unit is less than 0.5%.
8. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: the anoxic unit is a horizontal undercurrent type artificial wetland unit, the lower part of the anoxic unit is a gravel layer, the upper part of the anoxic unit is a soil layer, the diameters of gravels of the gravel layer are sequentially increased from top to bottom, and water flows below the surface of a unit substrate.
9. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: the length to width ratio of the anoxic unit is 2: 1-3: 1, the depth is 0.4-1.0 m;
or the hydraulic gradient of the anoxic unit is 0.5-1%.
10. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: emergent aquatic plants are planted in the anoxic unit, and the emergent aquatic plants are plants with smaller root systems and weaker oxygen secretion capacity.
11. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 10, characterized in that: the emergent aquatic plants include rhizoma Acori Calami, herba Zizaniae Caduciflorae, and herba Oenanthes Javanicae.
12. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 10, characterized in that: the planting density of emergent aquatic plants is 5-10 plants/m2。
13. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: the anaerobic unit consists of coarse gravel, and the hydraulic gradient of the anaerobic unit is 2-5% or more.
14. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: a unit clapboard is arranged between the anaerobic unit and the upper treatment unit, the unit clapboard is a wave plate, and the anaerobic unit is communicated with the upper treatment unit through a water through hole on one side of the unit clapboard;
or a partition wall is arranged between the anaerobic unit and the upper treatment unit, the partition wall is of a concrete or masonry structure, the anaerobic unit and the upper treatment unit are completely sealed by the partition wall, the upper treatment unit is directly communicated with the anaerobic unit through an overflow opening, and the overflow opening is positioned on the side wall of the upper treatment unit.
15. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 1, characterized in that: an anti-seepage water-stop layer is laid at the bottom of the artificial wetland main bed body, and the anti-seepage water-stop layer is formed by sequentially arranging large-grain-size gravel, small-grain-size gravel, sandy soil and field soil from bottom to top.
16. The multi-stage anoxic-anaerobic-aerobic integrated composite artificial wetland according to claim 15, characterized in that: the construction proportion of the large-particle-size gravel, the small-particle-size gravel, the sand and the field soil is 1: 1: 1: 1.5-2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020157573.6U CN211813693U (en) | 2020-02-07 | 2020-02-07 | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020157573.6U CN211813693U (en) | 2020-02-07 | 2020-02-07 | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211813693U true CN211813693U (en) | 2020-10-30 |
Family
ID=72992170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020157573.6U Active CN211813693U (en) | 2020-02-07 | 2020-02-07 | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211813693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115836A (en) * | 2020-02-07 | 2020-05-08 | 山东师范大学 | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland |
-
2020
- 2020-02-07 CN CN202020157573.6U patent/CN211813693U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111115836A (en) * | 2020-02-07 | 2020-05-08 | 山东师范大学 | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland |
| CN111115836B (en) * | 2020-02-07 | 2024-07-30 | 山东师范大学 | Multistage anoxic-anaerobic-aerobic integrated composite constructed wetland |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105859041A (en) | Combined multi-level ecological unit system for deeply treating secondary effluent of sewage plant | |
| CN108558141B (en) | Biological-ecological combined treatment system and method for rural sewage under low-temperature condition | |
| CN208292826U (en) | More PROCESS COUPLING multistage artificial wet land systems | |
| Mažeikienė | Improving small-scale wastewater treatment plant performance by using a filtering tertiary treatment unit | |
| CN113264641A (en) | Multistage ecological wetland high-efficiency purification system | |
| CN112678955A (en) | AO-inverted A2Enhanced denitrification sewage treatment system for/O coupling artificial wetland | |
| CN114524513A (en) | Method for treating low C/N sewage by anaerobic-aerobic-anoxic-moving bed autotrophic denitrification process | |
| CN211813693U (en) | Multistage anoxic-anaerobic-aerobic integrated composite artificial wetland | |
| CN212609832U (en) | Series-connection backflow enhanced denitrification constructed wetland | |
| CN205635276U (en) | Advanced treatment sewage secondary effluent's of factory multistage ecological unit combined system | |
| CN218579793U (en) | Compound nitrogen and phosphorus removal constructed wetland-microbial fuel cell system | |
| CN208166682U (en) | Multi-stage ecological artificial swamp for sewage disposal system | |
| CN215799046U (en) | Reoxygenation type constructed wetland | |
| CN111115836B (en) | Multistage anoxic-anaerobic-aerobic integrated composite constructed wetland | |
| CN214611770U (en) | AO-inverted A2Enhanced denitrification sewage treatment system for/O coupling artificial wetland | |
| CN211770850U (en) | Rural sewage treatment system of micro-power ecological wetland method | |
| CN211284068U (en) | Waste water purification device | |
| CN211644987U (en) | New rural hilly area resident house domestic sewage purifies recycling system | |
| CN210885515U (en) | Combined tail water nitrogen and phosphorus removal wetland device | |
| CN210528583U (en) | High ammonia nitrogen sewage treatment plant | |
| CN113443792A (en) | Zero-energy-consumption sewage treatment system for multistage subsurface flow constructed wetland | |
| CN207792954U (en) | A kind of system of domestic sewage in rural areas ecological management | |
| CN111825208A (en) | Multistage aerobic sewage treatment combined process | |
| CN111777265A (en) | Intermittent aeration aerobic/anoxic (O/A) type artificial rapid infiltration device | |
| CN110921999A (en) | High-energy-saving sewage multi-layer percolation purification treatment method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |