CN216191389U - AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal - Google Patents
AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal Download PDFInfo
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- CN216191389U CN216191389U CN202122254556.1U CN202122254556U CN216191389U CN 216191389 U CN216191389 U CN 216191389U CN 202122254556 U CN202122254556 U CN 202122254556U CN 216191389 U CN216191389 U CN 216191389U
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Abstract
The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal relates to the technical field of subsurface flow constructed wetlands and comprises a primary composite subsurface flow wetland, a secondary composite subsurface flow wetland and a tertiary composite subsurface flow wetland, wherein the primary composite subsurface flow wetland is connected with the secondary composite subsurface flow wetland, the secondary composite subsurface flow wetland is connected with the tertiary composite subsurface flow wetland, and the secondary composite subsurface flow wetland is sequentially provided with a second ash layer, a second geotextile, a second coarse sand, a sinking nano bionic microorganism carrier filler and a surface catchment area from bottom to top. The utility model constructs the subsurface flow constructed wetland into three-stage series operation, so that the constructed wetland forms an anaerobic, aerobic and anoxic environment, and the three-stage matching can strengthen the degradation capability of each stage of constructed wetland on organic matters, ammonia nitrogen, nitrate nitrogen and total phosphorus. The siphon water outlet pipe can improve the overall treatment effect of the wetland and can effectively avoid the blockage of the subsurface flow constructed wetland.
Description
Technical Field
The utility model relates to the technical field of subsurface flow constructed wetlands, in particular to an AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal.
Background
The artificial wetland is a technology for treating sewage by using the physical, chemical and biological triple synergistic action of soil, artificial media, plants and microorganisms in the process of flowing along a certain direction by using sewage which is controllably dosed to the artificially constructed wetland on the ground similar to the marshland which is artificially constructed and controlled to operate.
The artificial wetland removes pollutants in the water body through the species symbiosis and material circulation synergistic action among the substrate, the plants, the microorganisms and the zooplankton, promotes the virtuous cycle of the pollutants in the water body, fully exerts the production potential of resources, prevents the re-pollution of the environment and obtains the best benefits of sewage treatment and recycling. The substrate is a microorganism attachment carrier, needs to have a large specific surface area and provides a good place for the attachment of microorganisms. Plant roots, rhizosphere secretions and the like construct a rhizosphere microenvironment, so that the biodegradability of a water body is increased, the structure and metabolism of a rhizosphere microbial community are influenced, and the development of the roots is required for selecting plants; the plant can assimilate and absorb nutrient elements and other pollutants. The microorganisms remove pollutants from the water body through various physiological metabolic pathways, the removal efficiency of the artificial wetland is directly determined by the quantity of the microorganisms and the root system of the plant, and the quantity of the microorganisms and the specific surface area of the substrate have a direct relation. The zooplankton completes the accumulation and removal of organic matters by predating relevant microorganisms.
At present, the subsurface flow constructed wetland is generally set to be in single-stage anaerobic operation, and the single-stage anaerobic operation has lower degradation efficiency on organic matters, ammonia nitrogen, TP and TN.
SUMMERY OF THE UTILITY MODEL
Aiming at the problem that the single-stage anaerobic running subsurface flow constructed wetland in the prior art has low degradation efficiency on organic matters, ammonia nitrogen, TP and TN, the utility model provides an AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal, which can avoid the problem.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
an AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal comprises a primary composite subsurface flow wetland, a secondary composite subsurface flow wetland and a tertiary composite subsurface flow wetland, wherein the primary composite subsurface flow wetland is connected with the secondary composite subsurface flow wetland, the secondary composite subsurface flow wetland is connected with the tertiary composite subsurface flow wetland, and the secondary composite subsurface flow wetland is sequentially provided with a second grey soil layer, a second geotextile, a second coarse sand, a sinking nano bionic microorganism carrier filler and a surface catchment area from bottom to top.
Further, the first-level composite subsurface flow wetland is equipped with first gray soil layer, first geotechnical cloth, first coarse sand, first rubble, first volcanic rock, first sunshade net and first planting soil from bottom to top in proper order, the first-level composite subsurface flow wetland right side is equipped with the drainage canal, be equipped with second grade wetland guided membrane pipe in the drainage canal, second grade wetland guided membrane pipe end portion is equipped with first valve, be equipped with second grade wetland right side barricade between first-level composite subsurface flow wetland and the second-level composite subsurface flow wetland, be connected with second grade composite subsurface flow wetland behind the second through-hole that the other end of second grade wetland guided membrane pipe passed first through-hole, volcanic rock immobilized filler barricade, first rubble, second grade wetland right side barricade of drainage canal.
Furthermore, one side of the primary composite subsurface flow wetland is provided with a water distribution main pipe and a lower water distribution pipe, and an upper water distribution pipe is arranged right above the lower water distribution pipe.
Furthermore, a first plugging plate is arranged at the top of the drainage guide channel.
Furthermore, a first base cushion plate is arranged below the guide and exhaust channel.
And the scheme is refined, and the upper water distribution pipe can be positioned in the volcanic immobilized filler retaining wall or above the volcanic immobilized filler retaining wall.
Furthermore, the primary composite subsurface flow wetland is communicated with the secondary composite subsurface flow wetland through a primary wetland drainage pipe.
Furthermore, the filler of the submerged nano bionic microorganism carrier is 900mm high.
Furthermore, an aeration main pipe is arranged on the right baffle wall of the secondary wetland, the aeration main pipe is connected with an aeration main pipe, an aeration flange is arranged at the end part of the aeration main pipe, and a butterfly valve is arranged on the aeration main pipe.
Further, an aeration system is arranged at the bottom of the surface catchment area and comprises an aeration head and an aeration connecting pipe, the aeration connecting pipe is connected with an aeration main pipe, and the aeration connecting pipe is connected with the aeration head.
Further, be equipped with second grade wetland left side barricade between second grade composite underflow wetland and the tertiary composite underflow wetland, tertiary composite underflow wetland is equipped with second grey soil layer, second geotechnological cloth, second coarse sand, second rubble, second volcanic, second sunshade net and second planting soil from bottom to top in proper order, is equipped with the catchment canal on tertiary composite underflow wetland left side, install the siphon outlet pipe on the catchment canal, siphon outlet pipe one end is connected with the person in charge of catchmenting, the person in charge of catchmenting is in tertiary composite underflow wetland, and the siphon outlet pipe other end is in the catchment canal.
Further, the siphon outlet pipe includes left outlet pipe, water flat pipe and right inlet tube, wherein is equipped with the third through-hole on the water collecting channel, install the water flat pipe in the third through-hole, water flat pipe one end is equipped with left outlet pipe, and left outlet pipe is in the water collecting channel, and the water flat pipe other end is equipped with right inlet tube, right side water piping connection has the main pipe that catchments.
Furthermore, a second plugging plate is arranged at the top of the water collecting channel.
Further, a second foundation backing plate is arranged below the water collecting channel.
Further, the water collecting main pipe is connected with a plurality of water collecting branch pipes, each water collecting branch pipe comprises a semicircular steel pipe, each semicircular steel pipe is connected with a semicircular steel net rack, and hard sponge rings are arranged in the semicircular steel pipes and the semicircular steel net racks.
Furthermore, the semicircle steel pipe is located under the semicircle steel net rack, and the semicircle steel pipe is concentric with the semicircle steel net rack.
The utility model has the beneficial effects that:
the utility model constructs the subsurface flow constructed wetland into three-stage series operation, so that the constructed wetland forms an anaerobic, aerobic and anoxic environment, and the three-stage matching can strengthen the degradation capability of each stage of constructed wetland on organic matters, ammonia nitrogen, nitrate nitrogen and total phosphorus. The siphon water outlet pipe can control the wetland to siphon water outlet and control the wetland water level changing operation, the water level changing operation can improve the dissolved oxygen content in the wetland, the overall treatment effect of the wetland can be improved, and meanwhile the blockage of the subsurface flow constructed wetland can be effectively avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is an enlarged view of a portion of FIG. 1 at B;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C;
FIG. 5 is a sectional view of a water collecting manifold;
in the figure: 1 first-stage composite subsurface wetland, 11 first base backing plates, 12 drainage channels, 13 first through holes, 14 second-stage wetland membrane guide pipes, 15 first valves, 16 first plugging plates, 17 upper water distribution pipes, 18 lower water distribution pipes, 19 water distribution dry pipes, 110 first lime soil layers, 111 first coarse sand, 113 first broken stone, 114 first volcanic rock, 115 first planting soil,
2 second-stage composite subsurface wetland, 21 second-stage wetland right retaining wall, 22 first-stage wetland drain pipe, 23 second through hole, 24 second-stage wetland left retaining wall, 25 second lime soil layer, 26 second coarse sand, 27 sinking nano bionic microorganism carrier filler, 28 surface catchment area, 29 aeration main pipe, 210 aeration main pipe, 211 butterfly valve, 212 aeration flange,
3 three-stage composite subsurface wetland, 31 second foundation backing plates, 32 water collecting channels, 33 second plugging plates, 34 second lime soil layers, 35 second coarse sand, 37 second broken stone, 38 second volcanic rocks, 39 second planting soil, 310 siphon water outlet pipes, 311 horizontal pipes, 312 right water inlet pipes, 313 water collecting main pipes, 314 left water outlet pipes, 315 semicircular steel pipes, 316 semicircular steel net racks and 317 hard sponge rings.
Detailed Description
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified 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.
As shown in fig. 1 to 5, the AOA subsurface flow constructed wetland system for enhanced nitrogen and phosphorus removal comprises a primary composite subsurface flow wetland 1, a secondary composite subsurface flow wetland 2 and a tertiary composite subsurface flow wetland 3, wherein the primary composite subsurface flow wetland 1 is connected with the secondary composite subsurface flow wetland 2, and the secondary composite subsurface flow wetland 2 is connected with the tertiary composite subsurface flow wetland 3. Wherein the first-stage composite subsurface flow wetland and the third-stage composite subsurface flow wetland are common subsurface flow constructed wetlands, and the second-stage composite subsurface flow wetland is a submerged nano bionic microorganism carrier constructed wetland.
The system adopts three-stage collocation of the common subsurface flow constructed wetland, the submerged nano bionic microorganism carrier constructed wetland and the common subsurface flow constructed wetland, so that the constructed wetland forms an anaerobic, aerobic and anoxic environment, and the three-stage collocation can strengthen the degradation capability of each stage of constructed wetland on organic matters, ammonia nitrogen, nitrate nitrogen and total phosphorus. Aiming at different requirements of raw water and effluent of sewage, the size of the three-stage wetland can be flexibly adjusted, so that certain treatment capacity of the artificial wetland is enhanced.
In at least one embodiment, the primary composite subsurface flow wetland 1 is sequentially provided with a first gray soil layer 110, a first geotextile, a first coarse sand 111, a first broken stone 113, a first volcanic rock 114, a first sunshade net and a first planting soil 115 from bottom to top, the right side of the primary composite subsurface flow wetland is provided with a drainage channel 12, a secondary wetland membrane guiding pipe 14 is arranged in the drainage channel, the end part of the secondary wetland membrane guiding pipe 14 is provided with a first valve 15, a secondary wetland right retaining wall 21 is arranged between the primary composite subsurface flow wetland and the secondary composite subsurface flow wetland, and the other end of the secondary wetland membrane guiding pipe passes through a first through hole 13 of the drainage channel, a volcanic rock immobilized filler retaining wall, a first broken stone and a second through hole 23 of the secondary wetland right retaining wall and then is connected with a secondary composite subsurface flow wetland 2.
One side of the first-stage composite subsurface wetland is provided with a water distribution main pipe 19 and a lower water distribution pipe 18, and an upper water distribution pipe 17 is arranged right above the lower water distribution pipe.
Further, a first plugging plate 16 is arranged at the top of the drainage guide channel.
Further, a first foundation pad 11 is arranged below the drainage guide channel.
And the scheme is refined, and the upper water distribution pipe can be positioned in the volcanic immobilized filler retaining wall or above the volcanic immobilized filler retaining wall.
Further, the primary composite subsurface flow wetland is communicated with the secondary composite subsurface flow wetland through a primary wetland drainage pipe 22.
In at least one embodiment, the secondary composite subsurface wetland 2 is provided with a second lime soil layer 25, a second geotextile, a second coarse sand 26, a sinking nano bionic microorganism carrier filler 27 and a surface catchment area 28 from bottom to top in sequence.
Preferably, the filler of the submerged nano bionic microorganism carrier is 900mm high.
Compared with the traditional artificial wetland filler, the submersible nano bionic microorganism carrier filler has the advantages of large specific surface area, good hydrophilicity, difficult blockage and the like. The submerged nanometer bionic microorganism carrier is placed on the open water surface of the artificial wetland, so that the total microorganism amount of the artificial wetland can be obviously increased, the organic load of the unit area of the artificial wetland is further improved, and the engineering floor area is saved. Compared with other sewage treatment processes, the artificial wetland has the characteristic of long hydraulic retention time, and the artificial wetland with a wide water surface can perform relatively ideal dissolved oxygen exchange with air, so that the reoxygenation capacity of the artificial wetland is improved, and the degradation capacity and efficiency of the artificial wetland on organic matters and ammonia nitrogen are enhanced.
Further, an aeration main pipe 29 is arranged on the right baffle wall of the secondary wetland, the aeration main pipe is connected with an aeration main pipe 210, an aeration flange 212 is arranged at the end part of the aeration main pipe, and a butterfly valve 211 is arranged on the aeration main pipe.
In at least one embodiment, an aeration system is arranged at the bottom of the surface catchment area. The aeration system comprises an aeration head and an aeration connecting pipe, wherein the aeration connecting pipe is connected with an aeration main pipe, and the aeration connecting pipe is connected with the aeration head.
In at least one embodiment, a second-stage wetland left retaining wall 24 is arranged between the second-stage composite subsurface flow wetland and the third-stage composite subsurface flow wetland. Tertiary composite underflow wetland is equipped with second gray layer 34, second geotechnological cloth, second coarse sand 35, second rubble 37, second volcanic 38, second sunshade net and second planting soil 39 from bottom to top in proper order, is equipped with the canal 32 that catchments on tertiary composite underflow wetland left side, install siphon outlet pipe 310 on the canal that catchments, siphon outlet pipe one end is connected with the person in charge 313 that catchments, the person in charge of catchments is in tertiary composite underflow wetland, and the siphon outlet pipe other end is in the canal that catchments.
The scheme refines, the siphon outlet pipe includes left outlet pipe 314, water flat pipe 311 and right inlet tube 312, wherein is equipped with the third through-hole on the water catch channel, install the water flat pipe in the third through-hole, water flat pipe one end is equipped with left outlet pipe, and left outlet pipe is in the water catch channel, and the water flat pipe other end is equipped with right inlet tube, right side water piping connection has the person in charge that catchments.
Because a plurality of siphon water outlet pipes are arranged on the water collecting main pipe of the end undercurrent artificial wetland, the siphon water outlet pipes can control the wetland to siphon water, when the water level in the artificial wetland reaches a certain height, the siphon water outlet pipes automatically discharge water, and because the total drainage capacity of the siphon pipes is greater than the water distribution capacity of a water inlet system, the water in the wetland can be emptied in a short time, and the operation of changing the water level of the wetland can be controlled. The dissolved oxygen content in the wetland can be improved by the variable water level operation, so that the overall treatment effect of the wetland can be improved, and meanwhile, the blockage of the subsurface flow constructed wetland can be effectively avoided.
Further, a second plugging plate 33 is arranged at the top of the water collecting channel.
Further, a second foundation pad 31 is arranged below the water collecting channel.
In at least one embodiment, the main water collecting pipe is connected with a plurality of sub water collecting pipes, the sub water collecting pipes comprise semicircular steel pipes 315, the semicircular steel pipes are connected with semicircular steel net racks 316, and hard sponge rings 317 are arranged in the semicircular steel pipes and the semicircular steel net racks.
The scheme refines that the semicircle steel pipe is under the semicircle steel rack, and the semicircle steel pipe is concentric with the semicircle steel rack.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (10)
1. The AOA subsurface flow constructed wetland system for enhanced nitrogen and phosphorus removal is characterized by comprising a primary composite subsurface flow wetland, a secondary composite subsurface flow wetland and a tertiary composite subsurface flow wetland, wherein the primary composite subsurface flow wetland is connected with the secondary composite subsurface flow wetland, the secondary composite subsurface flow wetland is connected with the tertiary composite subsurface flow wetland, and the secondary composite subsurface flow wetland is sequentially provided with a second grey soil layer, a second geotextile, a second coarse sand, a sinking nano bionic microorganism carrier filler and a surface catchment area from bottom to top.
2. The AOA subsurface constructed wetland system for enhancing nitrogen and phosphorus removal according to claim 1, wherein the primary composite subsurface wetland is sequentially provided with a first lime soil layer, a first geotextile, a first coarse sand, a first crushed stone, a first volcanic rock, a first sunshade net and first planting soil from bottom to top, the right side of the primary composite subsurface wetland is provided with a drainage channel, a secondary wetland membrane guide pipe is arranged in the drainage channel, the end part of the secondary wetland membrane guide pipe is provided with a first valve, a secondary wetland right retaining wall is arranged between the primary composite subsurface wetland and the secondary composite subsurface wetland, and the other end of the secondary wetland membrane guide pipe passes through a first through hole of the drainage channel, a volcanic fixed filler retaining wall, the first crushed stone and a second through hole of the secondary wetland right retaining wall and then is connected with the secondary composite subsurface wetland.
3. The AOA subsurface flow constructed wetland system for enhanced nitrogen and phosphorus removal according to claim 1 or 2, wherein a water distribution main pipe and a lower water distribution pipe are arranged on one side of the primary composite subsurface flow wetland, and an upper water distribution pipe is arranged right above the lower water distribution pipe.
4. The AOA subsurface flow constructed wetland system for enhanced nitrogen and phosphorus removal according to claim 1, wherein the primary composite subsurface flow wetland is communicated with the secondary composite subsurface flow wetland through a primary wetland drainage pipe.
5. The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal according to claim 2, wherein an aeration main pipe is arranged on the right baffle wall of the secondary wetland, the aeration main pipe is connected with an aeration main pipe, an aeration flange is arranged at the end part of the aeration main pipe, and a butterfly valve is arranged on the aeration main pipe.
6. The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal according to claim 1, wherein an aeration system is arranged at the bottom of the surface catchment area, the aeration system comprises an aeration head and an aeration connecting pipe, the aeration connecting pipe is connected with an aeration main pipe, and the aeration connecting pipe is connected with the aeration head.
7. The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal as claimed in claim 1, wherein a secondary wetland left retaining wall is arranged between the secondary composite subsurface flow wetland and the tertiary composite subsurface flow wetland, the tertiary composite subsurface flow wetland is sequentially provided with a second lime soil layer, a second geotextile, a second coarse sand, a second gravel, a second volcanic rock, a second sunshade net and a second planting soil from bottom to top, a water collecting channel is arranged on the left side of the tertiary composite subsurface flow wetland, a siphon water outlet pipe is arranged on the water collecting channel, one end of the siphon water outlet pipe is connected with a water collecting main pipe, the water collecting main pipe is arranged in the tertiary composite subsurface flow wetland, and the other end of the siphon water outlet pipe is arranged in the siphon water collecting channel.
8. The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal of claim 7, wherein the siphon water outlet pipe comprises a left water outlet pipe, a horizontal pipe and a right water inlet pipe, wherein the water collecting channel is provided with a third through hole, the horizontal pipe is installed in the third through hole, one end of the horizontal pipe is provided with the left water outlet pipe, the left water outlet pipe is positioned in the water collecting channel, the other end of the horizontal pipe is provided with the right water inlet pipe, and the right water inlet pipe is connected with a main water collecting pipe.
9. The AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal of claim 8, wherein the main water collecting pipe is connected with a plurality of sub water collecting pipes, each sub water collecting pipe comprises a semicircular steel pipe, the semicircular steel pipe is connected with a semicircular steel net rack, and hard sponge rings are arranged in the semicircular steel pipes and the semicircular steel net rack.
10. The AOA subsurface flow constructed wetland system for enhanced nitrogen and phosphorus removal of claim 9 wherein the semicircular steel pipe is positioned under the semicircular steel net rack, and the semicircular steel pipe is concentric with the semicircular steel net rack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122254556.1U CN216191389U (en) | 2021-09-16 | 2021-09-16 | AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal |
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| CN202122254556.1U CN216191389U (en) | 2021-09-16 | 2021-09-16 | AOA subsurface flow constructed wetland system for enhancing nitrogen and phosphorus removal |
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