CN213416428U - Adjustable and controllable efficient denitrification wetland system with self-supplied carbon source - Google Patents
Adjustable and controllable efficient denitrification wetland system with self-supplied carbon source Download PDFInfo
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- CN213416428U CN213416428U CN202021547516.5U CN202021547516U CN213416428U CN 213416428 U CN213416428 U CN 213416428U CN 202021547516 U CN202021547516 U CN 202021547516U CN 213416428 U CN213416428 U CN 213416428U
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Abstract
The utility model discloses an adjustable and controllable self-sufficient carbon source high-efficiency denitrification wetland system, which comprises a carbon source release area, an anoxic denitrification area and a plant aerobic purification area which are arranged in sequence; the carbon source release area, the anoxic denitrification area and the plant aerobic purification area are separated by partition walls, and overflow holes are formed in the partition walls; the top of the carbon source release area is provided with a plurality of beams, and a plurality of hooks are arranged at intervals along the length direction of the beams; a carbon source release mesh bag is hung on the hook; the anoxic denitrification area is used for culturing microorganisms, and an ecological floating bed is also arranged in the anoxic denitrification area; submerged plants are planted in the plant aerobic purification area. Through reasonable collocation and timely harvesting of submerged plants in different seasons in the plant aerobic purification area, a stable and continuous carbon source can be provided for the wetland system without an additional carbon source, and the wetland system has a better water purification effect through reasonable design of different areas of the wetland system. Can be widely applied to the field of ecological purification of water bodies.
Description
Technical Field
The utility model relates to a water ecological purification field especially relates to a can regulate and control high-efficient denitrogenation wetland system of self-sufficient carbon source.
Background
With the continuous development of economy, the discharge of domestic sewage, industrial wastewater and non-point source pollution, the black and odorous water bodies in rivers and lakes and eutrophication become the main water environment problems in China. Under the background, certain provinces and key drainage basins in China successively come out higher sewage discharge standards, and are gradually linked with surface water index standards (such as sewage discharge standards of quasi V, quasi IV and the like). However, due to the limitation of cost or technology, the concentration requirement of TN in the discharge standard is still far higher than the water quality standard of surface water. The artificial wetland has high efficiency, low consumption and good ecological landscape effect, and is widely applied to sewage treatment and advanced purification of tail water at home and abroad. In order to improve the denitrification capability of the wetland system on the C/N sewage, the denitrification efficiency of the wetland is usually improved by adding an external carbon source. The added carbon source mainly comprises low molecular carbohydrate (such as methanol, acetic acid, glucose and the like) and plant biomass carbon source. Since the investment and operation cost of the system are greatly increased when low molecular weight carbohydrates are used as an external carbon source, the application of natural plants as the carbon source is gradually achieved. For example, in patent 201410170207, the solution of hydrolyzed crop or wetland plant straw is used as a carbon source, and then the solution is distributed and supplemented to the middle layer of the subsurface flow wetland, but a large hydrolysis station needs to be established because of the certain time for hydrolyzing the plant straw, and then the distribution of carbon source supplement pipes greatly increases the construction cost and difficulty of the wetland. In order to optimize the problems, the patent ZL201510404302.X directly uses the stem fragments of the emergent aquatic plants as wetland filler, and the patent ZL201810650247.6 directly uses the wood chips treated by alkaline liquor as wetland filler for improving the denitrification efficiency of the wetland. However, the plant biomass is directly used as the filler, the plant biomass is not suitable for replacement and supplement, the denitrification effect of the wetland is difficult to control along with the consumption of the biomass, and the wetland can be gradually reduced, even the wetland bed collapses due to the consumption of the filler, so that the wetland completely loses the function. In addition, when emergent aquatic plants or crop straws are used as an external carbon source of the traditional subsurface flow wetland, the carbon source is not completely utilized, so that secondary pollution of effluent water can be caused; meanwhile, after a large amount of anaerobic bacteria grow, the wetland bed is blocked.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
The utility model mainly aims at providing a water-purifying effective can regulate and control high-efficient denitrogenation wetland system of self-sufficient carbon source, the effect of water-purifying.
To achieve these objects and other advantages in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an adjustable and controllable efficient denitrification wetland system with a self-supplied carbon source, the wetland system comprising a carbon source release zone, an anoxic denitrification zone, and a plant aerobic purification zone, which are sequentially arranged;
any two adjacent areas of the carbon source release area, the anoxic denitrification area and the plant aerobic purification area are separated by partition walls, and overflow holes are formed in the partition walls;
the top of the carbon source release area is provided with a plurality of beams, and a plurality of hooks are arranged at intervals along the length direction of the beams; a carbon source release mesh bag is hung on each hook;
the anoxic denitrification area is used for culturing microorganisms, and an ecological floating bed is also arranged in the anoxic denitrification area;
submerged plants are planted in the plant aerobic purification area.
Preferably, a water inlet and a water outlet are respectively arranged on one of the relatively far side walls of the wetland system, and one overflow hole of a pair of overflow holes on two adjacent partition walls is positioned at the far end of the other overflow hole in the horizontal direction.
Preferably, a monitoring device is arranged at the overflow hole on the partition wall between the carbon source release area and the anoxic denitrification area.
Preferably, a mesh floating bed is arranged in the carbon source release area;
one or more of pennisetum purpureum, pulveratum foxtail algae and alternanthera philoxeroides are planted on the mesh floating bed.
Preferably, a plurality of planting baskets are arranged on the ecological floating bed;
emergent aquatic plants are planted on the planting baskets;
the emergent aquatic plant is one or more of canna, cattail, iris and cymbopogon.
Preferably, a carrier for culturing microorganisms is arranged in the anoxic denitrification region, and the carrier is a biomembrane strip carrier and is one or more of carbon fiber grass, elastic filler, soft filler and biological rope filler.
Preferably, the submerged plant is one or more of eel grass, curly pondweed, hydrilla verticillata, potamogeton muelleri and argyrophyllum spicatum.
The utility model discloses at least, include following beneficial effect:
1. the utility model discloses a reasonable collocation and the in good time of different seasons submerged plant reap in the good oxygen clean area of plant can provide stable continuous carbon source for the wetland system, need not plus carbon source.
2. The utility model discloses a reasonable set up anaerobic zone and good oxygen district, make full use of submerged plant residuum is easily degraded and the good oxygen purification characteristic of submerged plant, both provided high-quality carbon source, realize high-efficient denitrification, ensured other indexes up to standard again.
3. The utility model discloses a setting and quality of water on-line monitoring of carbon source release pocket, the plant carbon source is convenient for replenish in good time, realizes the accurate regulation and control of carbon source, ensures stable denitrogenation efficiency.
4. The carbon source used for denitrification and the oxygen needed for degrading organic matters in the utility model are both from the submerged plants in the wetland, thereby saving energy and protecting environment; the water flow of the wetland system is baffled and moves forward, and the flexible filler is adopted, so that the wetland system has high hydraulic efficiency and is not easy to block.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
FIG. 2 is a schematic view of the present invention looking down the direction of water flow;
FIG. 3 is a schematic structural view of a beam, a hook and a carbon source releasing mesh bag;
in the figure: 1. the device comprises a wetland water inlet, 2 a carbon source release area, 3 an anoxic denitrification area, 4 a plant aerobic purification area, 5 an impermeable layer, 6 a cross beam, 7 a hook, 8 a carbon source release mesh bag, 9 a mesh floating bed, 10 a partition wall, 11 an ecological floating bed, 12 a biomembrane strip carrier, 13 a mud layer, 14 a submerged plant, 15 an overflow hole, 16 a wetland water outlet, 17 and water quality online monitoring equipment.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "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, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-3, the utility model provides an adjustable and controllable self-sufficient carbon source high-efficiency denitrification wetland system, which comprises a carbon source release area 2, an anoxic denitrification area 3 and a plant aerobic purification area 4 which are arranged in sequence;
any two adjacent areas of the carbon source release area 2, the anoxic denitrification area 3 and the plant aerobic purification area 4 are separated by a partition wall 10, and overflow holes are formed in the partition wall 10;
the top of the carbon source release area 2 is provided with a plurality of beams 6, and a plurality of hooks 7 are arranged at intervals along the length direction of the beams 6; a carbon source release mesh bag 8 is hung on each hook 7;
the anoxic denitrification area 3 is used for culturing microorganisms, and an ecological floating bed 11 is also arranged in the anoxic denitrification area 3;
submerged plants 14 are planted in the plant aerobic purification area 4.
In the above-mentioned technical solution,
the sewage with low carbon-nitrogen ratio firstly enters the carbon source release area 2 from the wetland water inlet 11, the submerged plants 14 are degraded and release a large amount of organic matters after the carbon source release mesh bag 8 is aired and de-enzymed, thereby increasing the content of organic carbon in the sewage, then the sewage enters the anoxic denitrification area 3 through the overflow holes 15 on the partition wall 10, the high-efficiency denitrification and purification of the sewage are realized under the decomposition action of denitrifying bacteria and other microorganisms in the carrier, the net floating bed 9 can obstruct the water surface and the air, thereby providing a relatively anoxic environment, improving the decomposition effect of denitrifying bacteria and other microorganisms in the carrier, facilitating the realization of high-efficiency denitrification and purification of sewage, then the sewage enters the plant aerobic purification area 4 through the overflow hole 15, and the oxygen released by the photosynthesis of the submerged plant 14 is utilized to further purify the underutilized organic matters and pollutants such as ammonia nitrogen in the water body under the action of microorganisms.
A beam 6 is arranged at the upper part of the small interval occupied by the carbon source release area 2. The beam 6 is perpendicular to the water flow direction, and a hook 7 is arranged every 1m and used for hanging a carbon source release mesh bag 8. The distance between the beams 6 is 1-2m, the distance between the beams 6 and the water surface is 5-10cm, and the width interval is as follows: 20-30cm, which is convenient for the staff to walk and replace the carbon source releasing mesh bag 8. The carbon source release mesh bag 8 is cylindrical, the aperture is 200-300mm, the radius of the mesh bag is 20-30cm, and the height is about 10cm lower than the water depth. In the using process, the carbon source releasing mesh bag is filled with the harvested, aired and water-removed submerged plants 14, and the submerged plants are vertically immersed below the water surface, and the submerged plants 14 come from the plant aerobic purification area 4. The submerged plant 14 in the carbon source releasing mesh bag 8 is prepared by harvesting, airing and standing the submerged plant 14 in the plant aerobic purification area 4 for fixation, and by reasonably matching and timely harvesting the submerged plant 14 in the plant aerobic purification area 4 in different seasons, a stable and continuous carbon source can be provided for the wetland system without an additional carbon source. The bottom of the anoxic denitrification area 3 is fixed with a carrier which is mainly used for the growth of microorganisms (particularly denitrifying bacteria).
In another technical scheme, a water inlet and a water outlet are respectively arranged on one of the relatively far side walls of the wetland system, and one of the overflow holes of a pair of the overflow holes on the two adjacent partition walls 10 is positioned at the far end of the other overflow hole in the horizontal direction.
In the technical scheme, partition walls 10 can be arranged in the carbon source release area 2, the anoxic denitrification area 3 and the plant aerobic purification area 4, the partition walls 10 divide the carbon source release area 2, the anoxic denitrification area 3 and the plant aerobic purification area 4 of the wetland system into a plurality of small areas, the carbon source release area 2 generally occupies 1-2 small areas, the number of the small areas of the anoxic denitrification area 3 and the plant aerobic purification area 4 is designed according to the treated water amount and the content of pollutants such as COD (chemical oxygen demand), TN and the like, and the number ratio of the small areas occupied by the two areas is generally 1:3-1: 5. The head end of the wetland system is provided with a wetland water inlet 11, overflow holes 15 are arranged on the partition walls 10 between adjacent cells, and the tail end of the wetland system is provided with a wetland water outlet 16; the wetland water outlet 16, the overflow holes 15 and the wetland water outlet 16 are arranged in a reverse staggered manner from the structural plan view of the wetland system, so that the water body in the wetland is baffled and moves forward, and after a longer flowing distance, the water body needs longer time to flow through the wetland system and can be more fully purified. The wall and the bottom of the wetland system are both provided with seepage layers, so that the sewage is prevented from infiltrating to pollute the underground water.
In another technical scheme, a monitoring device is arranged at the overflow hole 15 on the partition wall 10 between the carbon source release region 2 and the anoxic denitrification region 3.
In the above technical scheme, the detection system is a water quality on-line monitoring device 17, and the water quality on-line monitoring device 17 mainly comprises detection modules for dissolved oxygen, chemical oxygen demand, ammonia nitrogen, total nitrogen and the like, and can detect pollutants and carbon content in a water body. During the operation of the wetland system, the carbon source releasing mesh bags 8 mounted in the carbon source releasing area 2 can be increased, decreased and replaced conveniently according to the real-time water quality data of the water quality on-line monitoring equipment 17, so that the ratio of COD/TN is maintained between 6:1 and 9:1, and the stable denitrification efficiency is ensured.
In another technical scheme, a mesh floating bed 9 is arranged in the carbon source release area 2;
one or more of pennisetum forbesii, watermifoil and alternanthera philoxeroides are planted on the mesh floating bed 9.
In the technical scheme, the mesh floating bed 9 can block the water surface and the air, so that a relatively anoxic environment is provided, the decomposition effect of denitrifying bacteria and other microorganisms in a carrier at the bottom of the anoxic denitrification area 3 is improved, the efficient denitrification and purification of sewage are facilitated, the mesh floating bed 9 is composed of PCV (polyvinyl chloride) pipes and rope nets, the PVC pipes are hermetically connected to form a square frame, the peripheries of the net ropes are fixed on the PVC pipes, aquatic plants such as the myriophyllum, the pulchrous green gulfweed, the alternanthera philoxeroides and the like are planted on the meshes, and the purification capacity of the wetland can be improved to a certain extent and the landscape can be ecologically beautified.
In another technical scheme, a plurality of planting baskets are arranged on the ecological floating bed 11;
emergent aquatic plants are planted on the planting baskets;
the emergent aquatic plant is one or more of canna, cattail, iris and cymbopogon.
In above-mentioned technical scheme, 3 surfaces of water in oxygen deficiency denitrification district are covered with ecological bed 11 that floats, and ecological bed 11 that floats has the planting basket, plants emergent aquatic plant in the planting basket, and emergent aquatic plant is the combination of multiple plants such as canna, cattail, iris, cymbopogon flexuosus, not only can improve sewage treatment efficiency, and the view is effectual moreover.
In another technical scheme, a carrier for culturing microorganisms is arranged in the anoxic denitrification zone 3, the carrier is a biomembrane strip carrier 12 and is one or more of carbon fiber grass, elastic filler, soft filler and biological rope filler.
In the technical scheme, the biomembrane strip carrier 12 is fixed at the bottom of the anoxic denitrification area 3, the biomembrane strip carrier 12 is a porous strip material, mainly provides a carrier for the growth of microorganisms (particularly denitrifying bacteria), is one or more of porous materials such as carbon fiber grass, elastic filler, soft filler or biological rope filler and the like, provides a good environment for the growth and decomposition of the microorganisms (particularly denitrifying bacteria), can greatly improve the water purification effect of the wetland system, and is higher in hydraulic efficiency and not suitable for blockage due to the adoption of the flexible filler.
In another technical scheme, the submerged plant 14 is one or more of eel grass, curly pondweed, black algae, potamogeton muelleri and argyrophyllum spicatum.
In the technical scheme, the bottom of the plant aerobic purification zone 4 is covered with a mud layer 13, and the thickness of the covering soil is 20-40 cm; the soil layer is planted with submerged plants 14 with the planting density of 60-80 plants/m2The submerged plant 14 is one or more of eel grass, curly pondweed, black algae, potamogeton muelleri and foxtail algae, and is prepared with different kinds of plant in different growing seasons.
When the submerged plant 14 grows out of the water surface, the plant bodies 0.5-0.7m below the water surface of the submerged plant 14 are harvested in time, and the harvested plants are aired and de-enzymed and then are loaded into the carbon source releasing mesh bag 8 to continuously provide carbon sources required by denitrification for the wetland system.
The bottom and the side of the adjustable self-sufficient carbon source efficient denitrification wetland system are both provided with impermeable layers 5, and the impermeable layers 5 are generally impermeable by adopting a 'two-cloth one-film' composite geomembrane with the water depth of 1.0-2.0 m.
The sewage with low carbon-nitrogen ratio firstly enters a carbon source release area 2 from a water inlet 1, submerged plants 14 are aired and de-enzymed in a carbon source release mesh bag 8 to degrade and release a large amount of organic matters, so that the content of organic carbon in the sewage is improved, then the sewage enters an anoxic denitrification area 3, an ecological floating bed 11 separates the water surface and air, the anoxic state of a water body is deepened, the efficient denitrification and purification of the sewage are realized under the decomposition action of denitrifying bacteria and other microorganisms in a biomembrane strip-shaped carrier 12, then the sewage enters a plant aerobic purification area 4, and the oxygen released by the photosynthesis of the submerged plants 14 is utilized to further purify the organic matters which are not fully utilized, ammonia nitrogen and other pollutants in the water body under the action of the microorganisms. Meanwhile, in the operation of the wetland system, the carbon source releasing mesh bags 8 mounted in the carbon source releasing area 2 are increased, decreased and replaced according to the real-time water quality data of the water quality on-line monitoring equipment 17, so that the ratio of COD/TN is maintained between 6:1 and 9:1, and the stable denitrification efficiency is ensured.
Example 1:
a construction method of an adjustable and controllable self-sufficient carbon source high-efficiency denitrification wetland system comprises the following steps:
step 1: carrying out earthwork excavation construction of the adjustable self-sufficient carbon source efficient denitrification wetland system, after excavation of a foundation pit is completed, paving impermeable layers 5 at the bottom and around, wherein the impermeable layers 5 are preferably made of plastic films for seepage prevention, the thickness of the films is preferably 0.5-1.0mm, and geotextile is lined at two sides.
Step 2: constructing a pool body, constructing a partition wall 10 to divide the pool body into a plurality of small intervals, wherein the pool body and the partition wall 10 of the wetland have no special requirements and can be made of materials well known by the technical personnel in the field; the carbon source release area 2 generally occupies 1-2 small intervals, the number of the small intervals occupied by the anoxic denitrification area 3 and the plant aerobic purification area 4 is designed according to the treated water volume and the content of pollutants such as COD (chemical oxygen demand), TN (total nitrogen) and the like, and the ratio of the small intervals occupied by the anoxic denitrification area 3 and the plant aerobic purification area 4 is generally 1:5-1:3 in order to ensure that the biomass of the submerged plant 14 harvested in the plant aerobic purification tank can meet the carbon source amount required by denitrification in the anoxic denitrification tank.
And step 3: and constructing a beam 6 in a small area occupied by the carbon source release area 2, wherein the beam 6 is provided with a hook 7 for mounting a carbon source release mesh bag 8. The beam 6 is perpendicular to the water flow direction, is 10-20cm away from the water surface, is 1-2m away from the adjacent beam 6, is 20-30cm wide, and is convenient for workers to walk and change or increase and decrease the carbon source release mesh bag 8.
And 4, step 4: the bottom end of a small area occupied by the anoxic denitrification area 3 is fixed with a biomembrane strip carrier 12, and the biomembrane strip carrier 12 is one or more of porous materials such as carbon fiber grass, elastic filler, soft filler or biological rope filler and the like, and mainly provides a carrier for the growth of microorganisms.
And 5: planting soil or natural pollution-free lake mud is paved at the bottom end of a small region occupied by the plant aerobic purification region 4 to form a bottom mud layer 13 with the thickness of 20-40 cm.
Step 6: introducing sewage to be treated, keeping the water depth of the small region occupied by the plant aerobic purification region 4 at about 0.5m, and planting submerged plants 14, wherein the submerged plants 14 are one or more of herba Picrasmae, curly pondweed and black algae, herba Equiseti Altatae, and Ixeris spicata, and the planting density is 60-80 plants/m2. After the submerged plant 14 survives, the water level is gradually raised until the designed water level is reached.
And 7: a square mesh floating bed 9 is built by using PVC pipes and rope nets, the PVC pipes are connected into a square shape in a sealing mode to form a frame framework, the rope nets are fixed on the PVC pipes, and the width of the frame is determined by the distance between the cross beams 6 and is 5-10cm smaller than the distance between the cross beams 6. Then inserting the aquatic plant into the net piece, wherein the aquatic plant is one or a combination of more of pennisetum purpureum, myriophyllum glaucum and alternanthera philoxeroides. And finally, placing the built mesh floating bed 9 on the water surface between the cross beams 6, connecting the mesh frame bodies by elastic bands, and flexibly fixing the two sides on the pool wall.
And 8: the ecological floating bed 11 with the planting basket is built, after the floating bed monomers with the planting basket are spliced, the floating bed monomers with the planting basket are fixed by PVC pipes to form a floating bed module, emergent aquatic plants are planted in the planting basket, and the emergent aquatic plants are the combination of canna, cattail, iris and cymbopogon sinensis. Then the ecological floating bed 11 is fully distributed in the anoxic denitrification area 3, all the floating bed modules are connected by elastic bands, and the two sides of the floating bed modules are flexibly fixed on the pool wall.
And step 9: and a water quality on-line monitoring device 17 is arranged at the tail end of the carbon source release area 2, and the water quality on-line monitoring device 17 mainly comprises detection modules for dissolved oxygen, chemical oxygen demand, ammonia nitrogen, total nitrogen and the like.
Step 10: the carbon source releasing mesh bag 8 is filled with the water-removed submerged plant 14, immersed below the water surface of the carbon source releasing area 2, and tied on the hook 7 of the beam 6 by a rope. The aperture of the carbon source releasing mesh bag 8 is 100-mesh and 200-mesh, the submerged plant 14 in the mesh bag comes from the plant aerobic purification area 4, and the COD/TN ratio in the water body of the carbon source releasing area 2 is kept in the range required by the target total nitrogen removal rate through airing and enzyme deactivation, the quantity of the carbon source releasing mesh bag 8 and the regulation and control according to the water quality data detected by the water quality on-line monitoring equipment 17 and the target removal rate of TN.
According to the steps, the controllable efficient denitrification wetland system with the self-supplied carbon source is established and used for deeply treating the tail water of a certain sewage treatment plant, and the monitoring for half a year is carried out in 5-12 months. In the operation process, the average contents of COD, total nitrogen, ammonia nitrogen and total phosphorus in the tail water of the sewage treatment plant are respectively 32.7mg/L, 13.6mg/L, 3.8mg/L and 0.41 mg/L. The hydraulic retention time of the wetland is 5 days (the carbon source release area 2 is 12 hours, the anoxic nitrification area is 24 hours, and the plant aerobic purification area 4 is 84 hours), the COD/TN at the tail end of the carbon source release area 2 is kept between 7:1 and 9:1, and the updating frequency of the submerged plant 14 in the carbon source release mesh bag 8 is about 45 to 65 days. The harvesting frequency of the submerged plants 14 in the plant aerobic purification area 4 is as follows: 2 times per month in 6-9 months and 1 time per month in 10-12 months. After the trial operation for 1 month, the removal rate of TN is stably maintained at 70%, and other indexes basically reach the standard of IV class.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (7)
1. The adjustable and controllable efficient denitrification wetland system with the self-supplied carbon source is characterized by comprising a carbon source release area, an anoxic denitrification area and a plant aerobic purification area which are sequentially arranged;
any two adjacent areas of the carbon source release area, the anoxic denitrification area and the plant aerobic purification area are separated by partition walls, and overflow holes are formed in the partition walls;
the top of the carbon source release area is provided with a plurality of beams, and a plurality of hooks are arranged at intervals along the length direction of the beams; a carbon source release mesh bag is hung on each hook;
the anoxic denitrification area is used for culturing microorganisms, and an ecological floating bed is also arranged in the anoxic denitrification area;
submerged plants are planted in the plant aerobic purification area.
2. The controllable self-supplied carbon source high-efficiency denitrification wetland system as claimed in claim 1, wherein a relatively far side wall of the wetland system is provided with a water inlet and a water outlet respectively, and one overflow hole of a pair of overflow holes on two adjacent partition walls is positioned at a horizontally far end of the other overflow hole.
3. The system of claim 1, wherein a monitoring device is installed at the overflow hole of the partition wall between the carbon source releasing region and the anoxic denitrification region.
4. The controllable self-sufficient carbon source high-efficiency denitrification wetland system as recited in claim 1, wherein a mesh floating bed is arranged in the carbon source release area;
one or more of pennisetum purpureum, pulveratum foxtail algae and alternanthera philoxeroides are planted on the mesh floating bed.
5. The controllable self-sufficient carbon source high-efficiency denitrification wetland system as claimed in claim 1, wherein a plurality of planting baskets are arranged on the ecological floating bed;
emergent aquatic plants are planted on the planting baskets;
the emergent aquatic plant is one or more of canna, cattail, iris and cymbopogon.
6. The system of claim 1, wherein the anoxic denitrification zone is internally provided with a carrier for culturing microorganisms, and the carrier is a biomembrane strip carrier and is one or more of carbon fiber grass, elastic filler, soft filler and biological rope filler.
7. The controllable self-supplied carbon source high-efficiency denitrification wetland system according to claim 5, wherein the submerged plants are one or more of eel grass, curly pondweed, black algae, potamogeton muelleri and watermifoil.
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|---|---|---|---|---|
| CN115259559A (en) * | 2022-07-29 | 2022-11-01 | 中国科学院南京地理与湖泊研究所 | Comprehensive treatment system for domestic sewage and farmland drainage in rural gathering area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115259559A (en) * | 2022-07-29 | 2022-11-01 | 中国科学院南京地理与湖泊研究所 | Comprehensive treatment system for domestic sewage and farmland drainage in rural gathering area |
| CN115259559B (en) * | 2022-07-29 | 2023-08-22 | 中国科学院南京地理与湖泊研究所 | Comprehensive treatment system for domestic sewage and farmland drainage in rural aggregation area |
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