CN110746047B - Stepped ecological micro-island with aeration microcirculation and method thereof - Google Patents
Stepped ecological micro-island with aeration microcirculation and method thereof Download PDFInfo
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- CN110746047B CN110746047B CN201911072192.6A CN201911072192A CN110746047B CN 110746047 B CN110746047 B CN 110746047B CN 201911072192 A CN201911072192 A CN 201911072192A CN 110746047 B CN110746047 B CN 110746047B
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
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- 238000009825 accumulation Methods 0.000 claims description 3
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Hydroponics (AREA)
Abstract
The invention discloses a stepped ecological micro-island with aeration microcirculation and a method thereof. The ecological micro island comprises an ecological floating bed and a power supply device; the ecological floating bed is erected with a fixed bracket, the power supply device is positioned on the fixed bracket, and the power supply device is completely exposed out of the water surface through the supporting and lifting action of the bottom fixed bracket; the ecological floating bed comprises a floating area and an immersion area, the floating area comprises emergent aquatic plants and a floating bed body, and the immersion area comprises a container frame and a filter screen, a plant drawer cage and an aeration device which are arranged in the container frame. The invention can realize multi-step and multi-level treatment and purification of water quality, can increase the purification area according to the needs, discharge the purified water flow to the far side of the river channel through the water suction pump and the water outlet pipe, and the untreated water body enters the purification area through the water inlet pipe, thereby realizing the maximization of the utilization of the ecological floating bed. The invention can be used for rivers and lakes, can also be used for artificial wetlands, and has good popularization and use values.
Description
Technical Field
The invention belongs to the technical field of ecological floating beds, and particularly relates to a stepped ecological micro-island with aeration microcirculation.
Background
Human civilization mostly originates from rivers and lakes, which are important components of the land ecosystem. However, as the human industrialization progresses faster, the eutrophication of the water area environment has a tendency of accelerating deterioration in recent years, and the lake ecosystem and the water body function are damaged, so that it is imperative to seek effective means for controlling and treating the eutrophication of the water body to ensure the circular operation of the water ecosystem.
In recent years, floating bed systems for water restoration using aquatic and terrestrial plants have attracted much attention. The ecological floating bed system is a water surface soilless plant planting technology which comprehensively integrates modern agricultural and ecological engineering measures by applying a soilless culture technology, taking high polymer materials as a carrier and a matrix. The plant essential elements such as nitrogen and phosphorus in the water body are absorbed and utilized by the plant in the growth process, and the plant root system, the floating bed matrix and the like have adsorption effects on suspended matters in the water body, so that harmful substances in the water body are enriched, meanwhile, the plant root system releases a large amount of secretion capable of degrading organic matters, the decomposition of organic pollutants is accelerated, and the water quality is improved.
Although the ecological floating bed technology has been greatly improved through long-term development, the ecological floating bed is still in the experimental and demonstration stage, and has some problems and disadvantages in use, such as: poor landscape effect, short service life, high unit cost and the like.
Disclosure of Invention
The invention aims to overcome the technical defects of the conventional ecological floating bed and provides a stepped ecological micro-island with aeration microcirculation and a method thereof.
The invention adopts the following specific technical scheme:
a step-type ecological micro-island with aeration microcirculation comprises an ecological floating bed and a power supply device; the ecological floating bed is erected with a fixed bracket, the power supply device is positioned on the fixed bracket, and the power supply device is completely exposed out of the water surface through the supporting and lifting action of the bottom fixed bracket; the ecological floating bed comprises a floating area and an immersion area, the floating area comprises emergent aquatic plants and a floating bed body, the emergent aquatic plants are positioned at the upper part of the floating bed body, and plant root systems of the emergent aquatic plants extend into a water body; the immersion area comprises a container frame, and a filter screen, a plant drawer cage and an aeration device which are arranged in the container frame; the container frame is a hollow container without the top, the upper side wall of the container frame is provided with a water inlet, the lower side wall or the bottom of the container frame is provided with a water outlet, and the upper side wall of the container frame is connected with a floating bed body of the floating area; the water outlet is provided with a water outlet pipeline, the water outlet pipeline is provided with a water outlet valve and a water pump, and the water outlet pipeline extends into the water body; the filter screen is fixed at the upper part in the container frame, the height of the filter screen is lower than that of the water inlet, the cross section area of the container frame at the height of the filter screen is completely covered by the filter screen, and a plurality of adsorption fillers are fixed on the filter screen; the plant drawer cage is positioned below the filter screen and is provided with a plurality of planting holes, a plurality of submerged plants are planted in the planting holes, and the cross section area of the container frame at the height of the plant drawer cage is completely covered by the plant drawer cage; the aeration device is positioned below the plant drawer cage; the power supply device is connected with the power consumption device through a waterproof wire to supply power.
Preferably, the power supply device adopts a wind power generator, a solar power generator or a hydroelectric generator.
Preferably, a plurality of plant baskets and floats are arranged on the bed body of the floating bed.
Preferably, the water inlet is provided with a water inlet pipeline, and a water inlet valve is arranged on the water inlet pipeline.
Preferably, the water outlet at the tail part of the water outlet pipeline is connected with an aeration spraying device or a water dropping wave making device.
Preferably, the adsorption filler comprises volcanic rock, vermiculite, zeolite, biochar and activated carbon.
Preferably, the plant drawer cage is a drawer-type movable container, a replacement opening is formed in the side wall of the container frame at the height of the plant drawer cage, and the plant drawer cage can enter and exit the container frame through the replacement opening.
Preferably, a porous flat plate or a slide way fixed inside the container frame is further arranged below the plant drawer cage so as to facilitate the movement of the plant drawer cage.
Preferably, floating plants are planted on the level of the submerged area.
Another object of the present invention is to provide a method for purifying a water body by using a stepped ecological micro-island with aeration micro-circulation as described above, comprising the following steps:
1) the water flow firstly passes through the plant root purification function of emergent aquatic plants in a floating area, and partial organic matters and nutritive salt in the water are removed to serve as nutrients; meanwhile, part of pollutants are intercepted and removed;
2) the water flow primarily purified by the floating area enters the immersion area through the water inlet of the container frame, and the water level of the immersion area is controlled to be lower than the water inlet by adjusting the water inlet valve or the water outlet valve; when water flow enters the submerged area from the water inlet, the water drop aeration effect is realized, the oxygen content in the water flow is increased, the energy dissipation effect is realized, and the scouring disturbance to each device and plants in the submerged area is reduced;
3) floating plants are planted on the water surface of the submerged area, and pollutants in the intercepted water can be further removed by utilizing the root system function of the plants;
4) the water flow flows downwards under the action of the water pump, and the filter screen and the adsorption filler fixed on the filter screen have the function of intercepting and adsorbing the water flow; the filter screen can intercept impurities in water flow, further reduce the water flow speed and increase the hydraulic retention time, so that more pollutants in water are adsorbed and intercepted by the adsorption filler;
5) the water flow enters the submerged plant area through the filter screen, the aeration device arranged below the plant drawer cage is utilized to aerate the anaerobic environment of the submerged plant root system, the content of dissolved oxygen in water is supplemented, the microenvironment around the submerged plant root system presents an aerobic-anoxic-anaerobic area, the diversity of the microorganism of the root system is increased, and the nitrification-denitrification effect and the accumulation effect of the microorganism on nitrogen and phosphorus are realized;
6) and discharging the water subjected to the stepped treatment in the immersion area from the water outlet pipeline through the water suction pump.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention is provided with various types of aquatic plants, thus improving the biodiversity;
(2) the loaded adsorption filler can provide an organic carbon source for the growth of plant roots and can also provide an attachment carrier for the growth of microorganisms, so that the diversity of the microbial communities of the plant roots is increased, and the water body purification effect is improved while the growth of aquatic plants is promoted;
(3) the invention can realize multi-step and multi-level water purification treatment, and can increase purification areas according to requirements;
(4) according to the invention, the purified water flow is discharged to the far side of the river channel through the water suction pump and the water outlet pipe, and the untreated water enters the purification area through the water inlet pipe, so that the maximization of the utilization of the ecological floating bed is realized;
(5) the invention can be used for rivers and lakes and can also be used for constructed wetlands.
In summary, the step-type ecological floating bed with the aeration microcirculation is easy to build and maintain, shortens the construction period of related projects, combines microorganisms and adsorbing materials to jointly treat water quality, improves the water quality purification capacity, and has good popularization and use values.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is an enlarged view of a portion of the submerged area of FIG. 1;
FIG. 3 is several top views of the present invention;
in the figure: the device comprises a floating area 1, a floater 2, a plant basket 3, emergent aquatic plants 4, a power supply device 5, a water inlet valve 6, a water inlet pipeline 7, floating plants 8, an adsorption filler 9, a filter screen 10, a container frame 11, submerged plants 12, an aeration device 13, a water outlet valve 14, a water suction pump 15, a water outlet pipeline 16, an immersion area 17, a plant drawer cage 18 and a replacement port 19.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
Fig. 1 shows a stepped ecological micro-island with aeration microcirculation, which comprises an ecological floating bed and a power supply device 5. The ecological floating bed is characterized in that a fixed support is erected on the ecological floating bed, the power supply device 5 is positioned on the fixed support, and the power supply device 5 is completely exposed out of the water surface through the supporting and lifting effect of the bottom fixed support; all be equipped with fixed connection device between fixed bolster and ecological bed and the power supply unit 5 that floats, fixed connection mode includes articulated, riveting, screw connection etc.. The power supply device 5 can adopt one or more combinations of a wind power generator, a solar power generator and a hydroelectric generator. The ecological floating bed comprises a floating area 1 and an immersion area 17, the floating area 1 comprises emergent aquatic plants 4 and a floating bed body, a plurality of plant baskets 3 are arranged on the floating bed body, the emergent aquatic plants 4 are planted in the plant baskets 3, and one part of the plant baskets 3 is positioned underwater, so that plant root systems in which the emergent aquatic plants 4 are planted can contact water and are not submerged by the water. The bed body of the floating bed is also provided with a plurality of floaters 2 which can improve the integral buoyancy of the floating bed and avoid sinking. The emergent aquatic plant 4 can be plants with large plant amount, developed root system, strong rhizome reproductive capacity and beautiful plants such as iris and canna.
As shown in fig. 2, which is a partial enlarged view of an immersion area 17 of the stepped ecological micro island with aeration microcirculation according to the present invention, the immersion area 17 includes a container frame 11, and a filter screen 10, a plant drawer 18 and an aeration device 13 which are arranged in the container frame 11. Wherein, the container frame 11 is a hollow container with a top removed, a water inlet is arranged at the upper part of the side wall, and a water outlet is arranged at the lower side wall or the bottom; the container frame 11 may be provided in various shapes as required, for example, it may have a circular, square, semicircular, etc. cross section. The upper side wall of the container frame 11 is connected with the floating bed body of the floating area 1 to form a whole with a section shape similar to a U shape. A water inlet pipe 7 is arranged at a water inlet of the container frame 11, and a water inlet valve 6 for controlling the on-off and flow of the pipeline is arranged on the water inlet pipe 7. The water outlet is provided with a water outlet pipeline 16, the water outlet pipeline 16 is provided with a water outlet valve 17 and a water pump 15, and the water outlet pipeline 16 extends into the water body. The water outlet at the tail part of the water outlet pipeline 16 can extend to a river body far away from the ecological micro island, so that the treated and purified water flow is discharged to a far place, the untreated water flow enters through the water inlet, the condition of repeated treatment of the same water body is avoided, and the treatment efficiency and the purification effect are improved. The water outlet at the tail part of the water outlet pipeline 16 can also be connected with an aeration injection device or a water drop wave making device to further carry out oxygenation treatment on the water body. The filter screen 10 is fixed on the upper part in the container frame 11, the height is lower than the water inlet, the filter screen 10 completely covers the cross section area of the container frame 11 at the height of the filter screen, so that water flow can only enter the downstream after passing through the filter screen 10. A plurality of adsorption fillers 9 are fixed on the filter screen 10, and the adsorption fillers 9 comprise volcanic rock, vermiculite, zeolite, biochar and activated carbon. The adsorption filler 9 can be arranged in a small-hole ecological bag to avoid being washed away with water flow. The plant drawer cage 18 is positioned below the filter screen 10 and is provided with a plurality of planting holes, a plurality of submerged plants 12 are planted in the planting holes, and the submerged plants 12 comprise tape grass, goldfish algae, watermifoil algae, hydrilla verticillata and the like; the plant drawer cage 18 completely covers the cross-sectional area of the container frame 11 at the level of the plant drawer cage, so that water can only flow downstream through the plant drawer cage 18. The plant drawer cage 18 may be fixed inside the container frame 11, but in order to facilitate replacement and maintenance of the submerged plants 12, the plant drawer cage 18 may also be provided as a movable container like a drawer. A replacement opening 19 is formed in the side wall of the container frame 11 at the height of the plant drawer cage 18, and the plant drawer cage 18 can enter and exit the container frame 11 through the replacement opening 19. A porous plate or a slide way fixed inside the container frame 11 is also arranged below the plant drawer cage 18 so as to facilitate the movement of the plant drawer cage 18. In order to facilitate the movement of the plant drawer cage 18, a handle, an L-shaped recess and other parts facilitating the drawer cage to be taken out can be further arranged on the side wall of the plant drawer cage 18 at the replacement opening 19. When the container is used, the edge of the plant drawer cage 18 is completely matched with the replacing opening 19, and in order to enable the container frame 11 to be in a sealing state when the container is used, the edge of the replacing opening 19 can be provided with a sealing device, such as a rubber ring and the like. The aeration device 13 is positioned below the plant drawer cage 18, and the aeration device 13 is fixedly connected with the inner side wall of the container frame 11 or the filter screen 10 through a fixing device. The power supply device 5 is connected with a power consumption device through a waterproof wire for supplying power. Floating plants 8 are planted on the horizontal surface of the immersion area 17, and the floating plants 8 comprise duckweed, water hyacinth and the like.
The floating region 1 and the submerged region 17 may be connected in different combinations, as shown in fig. 3, the floating region 1 may have a circular or square outer periphery in plan view, and the submerged region 17 may have a circular or square outer periphery in plan view.
The stepped ecological micro-island with aeration microcirculation can float in water bodies to be purified, such as rivers, lakes, ponds, wetlands and the like, and the water body purification method based on the stepped ecological micro-island comprises the following steps:
1) water flow firstly passes through the plant root purification effect of emergent aquatic plants 4 in the floating area 1, partial organic matters and nutritive salt in water are removed to serve as nutrients, and partial pollutants are intercepted and removed.
2) The water flow primarily purified by the floating area 1 enters the immersion area 17 through the water inlet of the container frame 11, the water inlet flow and the water outlet flow are adjusted through the water inlet valve 6, the water outlet valve 17 and the water suction pump 15, and the water surface height of the immersion area 17 is controlled to be lower than the water inlet. Therefore, when water flow enters the submerged area 17 from the water inlet, drop aeration can be realized, the oxygen content in the water flow is increased, the energy dissipation effect is realized, and the scouring disturbance to each device and plants in the submerged area 17 is reduced.
3) Floating plants are planted on the water surface of the immersion area 17, and pollutants in the intercepted water can be further removed by utilizing the root system function of the plants.
4) The water flow flows downwards under the action of the water pump 15, and the filter screen 10 and the adsorption filler 9 fixed on the filter screen have the function of intercepting and adsorbing the water flow; the filter screen 10 can intercept sundries such as garbage, plant leaves, insect remains and the like in the water flow, further reduce the water flow speed, and increase the hydraulic retention time, so that more pollutants in the water are adsorbed and intercepted by the adsorption filler 9.
5) The water flow enters the submerged plant 12 area through the filter screen 10, and a plurality of plant drawer cages 18 can be arranged according to the water quality and the requirement; because the root system of the submerged plant 12 is mainly anaerobic environment and the microorganism species are single, the aeration device 13 is arranged below the plant drawer cage 18 to supplement the dissolved oxygen content in water, so that the microenvironment around the root system of the submerged plant 12 presents an aerobic-anoxic-anaerobic region, the diversity of the microorganism of the root system is increased, and the nitrification-denitrification effect and the accumulation effect of the microorganism on nitrogen and phosphorus are realized.
6) The water subjected to the stepwise treatment in the immersion area 17 is discharged from the water outlet pipeline 16 through the water suction pump 15, a water outlet at the tail part of the water outlet pipeline 16 can extend to a river body far away from the ecological micro island, so that the treated and purified water flow can be discharged to a far place, and untreated water flow enters through a water inlet, so that the condition of repeated treatment of the same water body is avoided, and the treatment efficiency and the purification effect are improved; the water outlet at the tail part of the water outlet pipeline 16 can also be connected with an aeration injection device or a water drop wave making device to further carry out oxygenation treatment on the water body.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A stepped ecological micro-island with aeration microcirculation is characterized by comprising an ecological floating bed and a power supply device (5); the ecological floating bed is characterized in that a fixed support is erected on the ecological floating bed, the power supply device (5) is positioned on the fixed support, and the power supply device (5) is completely exposed out of the water surface through the supporting and lifting effect of the bottom fixed support; the ecological floating bed comprises a floating area (1) and an immersion area (17), the floating area (1) comprises emergent aquatic plants (4) and a floating bed body, the emergent aquatic plants (4) are positioned on the upper part of the floating bed body, and plant root systems of the emergent aquatic plants extend into a water body; the immersion area (17) comprises a container frame (11), and a filter screen (10), a plant drawer cage (18) and an aeration device (13) which are arranged in the container frame (11); the container frame (11) is a hollow container with the top removed, the upper side wall is provided with a water inlet, the lower side wall or the bottom is provided with a water outlet, and the upper side wall of the container frame (11) is connected with a floating bed body of the floating area (1); the water outlet is provided with a water outlet pipeline (16), the water outlet pipeline (16) is provided with a water outlet valve (17) and a water pump (15), and the water outlet pipeline (16) extends into the water body; the filter screen (10) is fixed at the upper part in the container frame (11) and is lower than the water inlet, the filter screen (10) completely covers the cross section area of the container frame (11) at the height of the filter screen, and a plurality of adsorption fillers (9) are fixed on the filter screen (10); the plant drawer cage (18) is positioned below the filter screen (10) and is provided with a plurality of planting holes, a plurality of submerged plants (12) are planted in the planting holes, and the cross section area of the container frame (11) at the height of the plant drawer cage (18) is completely covered by the plant drawer cage; the aeration device (13) is positioned below the plant drawer cage (18); the power supply device (5) is connected with a power consumption device through a waterproof wire to supply power.
2. Stepped ecological micro-island according to claim 1, characterised in that the power supply means (5) are wind, solar or hydro generators.
3. Stepped ecological micro-island according to claim 1, characterised in that the bed of said floating bed is provided with several plant baskets (3) and floats (2).
4. An aerated micro-circulating stepped ecological micro-island according to claim 1, wherein said water inlet is provided with a water inlet pipe (7), and the water inlet pipe (7) is provided with a water inlet valve (6).
5. An aerated micro-circulating stepped ecological micro-island according to claim 1, wherein an aerated spraying device or a water drop wave-making device is connected to the water outlet at the tail of the water outlet pipe (16).
6. Stepped ecological micro-island according to claim 1, characterized in that the adsorbing fillers (9) are one or more of volcanic rock, vermiculite, zeolite, biochar and activated carbon.
7. An ecological stepped island with aeration microcirculation according to claim 1, wherein the plant drawer cages (18) are drawer-type movable containers, the side walls of the container frame (11) at the height of the plant drawer cages (18) are provided with replacing openings (19), and the plant drawer cages (18) can enter and exit the container frame (11) through the replacing openings (19).
8. An ecological cascaded island of aerated micro-cycles according to claim 7, wherein a perforated plate or a slide way fixed inside the container frame (11) is further provided under the plant drawer cage (18) for the movement of the plant drawer cage (18).
9. Stepped ecological island of aerated microcirculation according to claim 1, characterized by that the level of the submerged areas (17) are planted with floating plants (8).
10. The water body purification method of the stepped ecological micro island according to any one of claims 1 to 8, characterized by comprising the following steps:
1) the water flow firstly passes through the plant root purification function of emergent aquatic plants (4) in the floating area (1) to remove partial organic matters and nutritive salt in the water as nutrients; meanwhile, part of pollutants are intercepted and removed;
2) the water flow primarily purified by the floating area (1) enters the immersion area (17) through the water inlet of the container frame (11), and the water surface height of the immersion area (17) is controlled to be lower than the water inlet by adjusting the water inlet flow and the water outlet flow; when water flow enters the submerged area (17) from the water inlet, the water drop aeration effect is realized, the oxygen content in the water flow is increased, the energy dissipation effect is realized, and the scouring disturbance to each device and plants in the submerged area (17) is reduced;
3) floating plants are planted on the horizontal plane of the immersion area (17), and pollutants in the intercepted water are further removed by utilizing the root system function of the plants;
4) the water flow flows downwards under the action of a water pump (15), and the filter screen (10) and the adsorption filler (9) fixed on the filter screen have the function of intercepting and adsorbing the water flow; impurities in the water flow are intercepted through the filter screen (10), meanwhile, the water flow speed is further reduced, the hydraulic retention time is prolonged, and more pollutants in the water are adsorbed and intercepted by the adsorption filler (9);
5) the water flow enters a submerged plant (12) area through a filter screen (10), an aeration device (13) below a plant drawer cage (18) is utilized to aerate the anaerobic environment of the root system of the submerged plant (12) to supplement the content of dissolved oxygen in the water, so that a microenvironment around the root system of the submerged plant (12) presents an aerobic-anoxic-anaerobic area, the diversity of microorganisms of the root system is increased, and the nitrification-denitrification effect and the accumulation effect of the microorganisms on nitrogen and phosphorus are realized;
6) the water treated in a stepped manner in the immersion area (17) is discharged from the water outlet pipe (16) through the water suction pump (15).
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| CN112499783B (en) * | 2020-11-26 | 2023-12-12 | 苏州金螳螂园林绿化景观有限公司 | Oxygenation filtering method and system for river pollution treatment |
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