CN110902837A - Artificial lake point source pollution detention and purification artificial wetland - Google Patents
Artificial lake point source pollution detention and purification artificial wetland Download PDFInfo
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- CN110902837A CN110902837A CN201911233425.6A CN201911233425A CN110902837A CN 110902837 A CN110902837 A CN 110902837A CN 201911233425 A CN201911233425 A CN 201911233425A CN 110902837 A CN110902837 A CN 110902837A
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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
- 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
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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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
- 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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Abstract
The invention relates to an artificial lake point source pollution retention and purification constructed wetland, which comprises an arc-shaped regulation and storage tank, a retention device and an undercurrent ascending type constructed wetland. When the rainfall is small, initial rainwater and sewage are regulated and stored by the reservoir, and after impurities are intercepted by the coarse grids and the fine grids, the detention time of water flow is prolonged by the detention device, and then the initial rainwater and the sewage flow into the undercurrent ascending type artificial wetland with the purification function. When the rainfall is large, the initial rainwater and the sewage are sequentially treated by the arc-shaped regulation and storage tank, the detention device and the subsurface flow ascending type artificial wetland and then discharged into the lake. When the water surface in the storage pond submerges the identification line, the control valve is opened, and relatively clean later-stage rainwater is directly discharged into the lake through the straight-wall pipe. The invention has the advantages of being capable of carrying out different separation treatments according to the rainfall, realizing effective interception and purification of initial rainwater and sewage, having the advantages of simple process and low construction and maintenance cost, and being widely applied to the field of water pollution control.
Description
Technical Field
The invention belongs to the field of water pollution control, and particularly relates to an artificial lake point source pollution detention purification artificial wetland.
Technical Field
Due to the complexity of the municipal drainage pipe network, great difficulty exists in completely separating all rainwater pipe networks and sewage pipe networks, so that most municipal drainage systems in China currently keep combined drainage systems. The combined drainage system not only undertakes the conveying and discharging of urban domestic sewage, but also is a drainage channel of rainfall runoff, namely a dual channel of urban point source and surface source pollution. After the rainfall takes place, the flow in the confluence system pipeline can increase along with the increase of rainfall, when the pipeline flow surpassed the carrying capacity who dams the trunk line, unnecessary partial rain sewage that mixes was from the inspection shaft with the terminal overflow of pipe network, causes urban large waterlogging, seriously pollutes urban environment and receives the water.
The combined sewage contains a large amount of organic matters, and dissolved oxygen in the water body can be consumed in the degradation process after the combined sewage is discharged into the water body, so that the low dissolved oxygen state appears in the water body, and the survival of aquatic organisms is influenced. In addition, the combined sewage contains a large amount of nutrient substances such as nitrogen, phosphorus and the like, and the combined sewage is discharged into a water body, so that the water body is possibly eutrophicated, and the water bloom and the like occur, thereby affecting the function of the water body. Meanwhile, a large amount of pathogens such as heavy metals, bacteria, viruses and the like can be discharged into a water body by the combined sewage, the heavy metals are enriched in aquatic organisms, and the pathogens are propagated and spread in water, so that the health and safety of human beings are threatened.
Because of the imperfection of the onshore sewage interception pipe network in some areas and the lagged project of artificial lake water pollution remediation, the point source pollution of the artificial lake caused by the combined rain and sewage ports distributed around the artificial lake is increasingly serious. To address this problem, many scholars have proposed different solutions.
Patent No. CN201810411907.5 discloses a gutter inlet filter purification device, and the characteristics of the device are easily at present gutter inlet transformation upgrade, but the shortcoming lies in only can carrying out simple filtration, collection effect, sewage and rainwater treatment thoroughly. Patent No. CN201821405693.2 discloses a floating point source pollution purification device, and the device's characteristics are conveniently to purify fixed point source pollution, but the shortcoming lies in that the microorganism throws the microbial inoculum of the inslot and need artifical the regular feeding, can't guarantee the processing state of microorganism moreover.
This patent has provided a constructed wetland construction technique is purified in artificial lake point source pollution detention, intercepts, is detained, purifies to initial stage rainwater and the sewage that flows in the system rain sewage mouth of flowing, can carry out different separation processes according to the rainfall size simultaneously.
Disclosure of Invention
Aiming at the problem of water pollution caused by the fact that initial rainwater and sewage are directly discharged into an artificial lake from a confluence rainwater and sewage port at present, the invention intercepts, retains and purifies rainwater and sewage flowing out of the confluence rainwater and sewage port and performs different separation treatments according to the magnitude of rainfall
The invention is realized by the following technical scheme: the artificial lake is in point source pollution detention and purification of the artificial wetland,
the combined rainwater and sewage pipe is used for draining rainwater and sewage of the rainwater pipe network and the sewage pipe network;
the arc-shaped storage tank is used for storing rain sewage drained by the confluence rain sewage pipe;
the detention device is used for guiding the rainwater and sewage in the arc-shaped regulation and storage tank, removing impurities, and reducing the flow rate of the rainwater and sewage and controlling the flow rate;
the undercurrent ascending type artificial wetland carries out water treatment on the rain sewage in the retention device and discharges the rain sewage into the artificial lake.
The invention relates to a preferable scheme for purifying artificial wetland by artificial lake point source pollution detention, which comprises the following steps: the arc-shaped regulation and storage tank comprises a reservoir for storing rain sewage, and a straight wall pipe which is communicated with the reservoir and the artificial lake and is provided with a control valve;
and the water storage tank is internally provided with a mark line for storing water.
The invention relates to a preferable scheme for purifying artificial wetland by artificial lake point source pollution detention, which comprises the following steps: the retention device comprises a cleaning groove for removing impurities in the rain sewage, a coarse grid for primarily filtering the impurities in the rain sewage entering the cleaning groove from the reservoir, a fine grid arranged in the cleaning groove for further filtering the impurities in the rain sewage, a water delivery tank for storing the rain sewage after impurity removal, a movable baffle plate capable of sliding at the bottom of the water delivery tank, a valve well for controlling flow, and a water delivery pipe for delivering the rain sewage into the undercurrent ascending artificial wetland;
a pulling plate I for cleaning sundries in the rainwater and sewage is arranged in the cleaning groove primarily filtered by the coarse grating;
the fine grid filters sundries, a pull plate II used for cleaning sundries in rainwater and sewage is installed in the cleaning groove, and a turnover plate speed reducer used for reducing the flow speed of the rainwater and sewage.
The invention relates to a preferable scheme for purifying artificial wetland by artificial lake point source pollution detention, which comprises the following steps: the bottom of the undercurrent ascending type artificial wetland is a basic tamping layer, the left side and the right side above the basic tamping layer are respectively a water distribution area and a water collection area, wherein the middle part of the undercurrent ascending type artificial wetland is sequentially provided with a plant planting area, a water storage layer, a bark covering layer, a planting soil layer, an artificial packing layer, a sand layer, a gravel layer and an impermeable membrane from top to bottom;
the water delivery pipe in the retention device is positioned between the gravel layer and the impermeable membrane, so that rain sewage flows layer by layer from bottom to top;
and the fillers in the water distribution area and the water collection area are volcanic rocks.
The invention relates to a preferable scheme for purifying artificial wetland by artificial lake point source pollution detention, which comprises the following steps: the device also comprises a water collecting channel for storing the treated rainwater and sewage, a water inlet for communicating the undercurrent ascending artificial wetland and the water collecting channel, and a water outlet for discharging the treated rainwater and sewage in the water collecting channel to flow into the artificial lake.
The invention has the advantages that:
(1) the investment is small, and a large amount of funds are saved. The original combined rain and sewage port can be fully utilized, and a large amount of complicated and difficult policy processing work is avoided.
(2) Easy to implement, and more rapid and effective. The method is used for quickly and effectively intercepting and purifying initial rainwater and sewage flowing out of the existing combined rainwater and sewage port (fixed point source pollution) around the artificial lake.
(3) And carrying out classification treatment on different rainwater. When the rainfall is small, the initial rainwater and sewage are treated and then discharged into the lake. When the rainfall is large and the water surface in the regulation and storage tank is submerged over the identification line, the control valve is opened, the initial rainwater and the sewage are treated and purified, and the relatively clean later rainwater is directly discharged into the lake through the straight-wall pipe.
(4) And the adaptability is strong. Is suitable for arid areas, old city reconstruction and other areas.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a top view of the water transfer tank;
fig. 4 is a schematic view of the installation of the flap speed reducer.
Detailed Description
The invention is further illustrated by the following examples and figures.
Example 1
Referring to fig. 1-4, the artificial lake point source pollution is retained and purified in the artificial wetland,
the confluence rainwater and sewage pipe 1 is used for draining rainwater and sewage of a rainwater pipe network and a sewage pipe network;
the arc regulation and storage tank 2 is used for storing rain sewage drained by the confluence rain sewage pipe 1;
the detention device 3 is used for guiding the rainwater and sewage in the arc regulation and storage tank 2, removing impurities, and reducing the flow rate of the rainwater and sewage and controlling the flow rate;
the undercurrent ascending type artificial wetland 4 treats the rainwater and sewage in the retention device 3 and discharges the rainwater and sewage into the artificial lake 33.
The arc-shaped regulation and storage tank 2 comprises a reservoir 5 for storing rain sewage, and a straight wall pipe 6 which is communicated with the reservoir 5 and the artificial lake 33 and is provided with a control valve 7;
the reservoir 5 is internally provided with a marking line 8 for storing water.
The detention device 3 comprises a cleaning groove 10 for removing impurities in the rainwater and sewage, a coarse grid 9 for primarily filtering the impurities in the rainwater and sewage entering the cleaning groove 10 from the reservoir 5, a fine grid 12 installed in the cleaning groove 10 for further filtering the impurities in the rainwater and sewage, a water delivery tank 15 for storing the rainwater and sewage after impurity removal, a movable baffle 17 which can slide at the bottom of the water delivery tank 15, a valve well 16 for controlling flow, and a water delivery pipe 18 for delivering the rainwater and sewage into the undercurrent ascending type artificial wetland 4;
a pulling plate I11 for cleaning sundries in the rainwater and sewage is arranged in the cleaning groove 10 after the primary filtration of the coarse grating 9
And a pulling plate II 13 for cleaning sundries in the rainwater and sewage and a flap speed reducer 14 for reducing the flow speed of the rainwater and sewage are arranged in the cleaning groove 10 for filtering the sundries through the fine grating 12.
The bottom of the undercurrent ascending type artificial wetland 4 is a basic tamping layer 28, the left side and the right side above the basic tamping layer 28 are respectively a water distribution area 20 and a water collection area 29, wherein the middle part of the undercurrent ascending type artificial wetland is sequentially provided with a plant planting area 19, a water storage layer 21, a bark covering layer 22, a planting soil layer 23, an artificial packing layer 24, a sand layer 25, a gravel layer 26 and an impermeable membrane 27 from top to bottom;
the water delivery pipe 18 in the detention device 3 is positioned between the gravel layer 26 and the impermeable membrane 27, so that the rain sewage flows layer by layer from bottom to top.
The filler in the water distribution area 20 and the water collection area 29 is volcanic rock.
The artificial lake further comprises a water collecting channel 31 for storing the treated rainwater and sewage, a water inlet 30 for communicating the subsurface flow ascending artificial wetland 4 with the water collecting channel 31, and a water outlet 32 for discharging the treated rainwater and sewage in the water collecting channel 31 to flow into the artificial lake 33.
Example 2
The invention provides a constructed wetland for detention and purification of point source pollution of an artificial lake, which comprises an arc-shaped regulation and storage tank 2, a detention device 3 and an undercurrent ascending type constructed wetland 4, and is shown in figures 1-4.
The arc-shaped regulation and storage tank 2 consists of a water storage tank 5, a straight wall pipe 6, a control valve 7 and a marking line 8.
The detention device 3 consists of a coarse grating 9, a cleaning groove 10, a pulling plate I11, a fine grating 12, a pulling plate II 13, a flap speed reducer 14, a water delivery tank 15, a valve well 16, a movable baffle 17 and a water delivery pipe 18.
The water storage tank 5 formed by pouring concrete is arc-shaped and plays a role in regulating and storing rain sewage; the straight-wall pipe 6 is connected with the water reservoir 5 through a control valve 7, and when the water level in the water reservoir 5 does not exceed the marking line 8, the control valve 7 is closed; when the water level exceeds the marking line 8, the control valve 7 is opened, and later rainwater is directly discharged into the lake through the straight-wall pipe 6.
The coarse grating 9 made of stainless steel is used for removing larger floating objects such as garbage in sewage, so as to reduce the treatment load of the subsequent water treatment process and prevent the water conveying pipe 18 from being blocked. The fine grids 12 made of stainless steel are spaced 5mm apart in order to intercept smaller particles and suspended matter and prevent blockage of the water duct 18. The cleaning groove 10 is made of plastic steel, and has the characteristics of durability and low price. The pulling plate I11 is made of stainless steel. The cleaning personnel can open the pull plate 11 periodically to check and clean the sundries intercepted by the fine grating 12 in the cleaning tank 10. Two rows of stainless steel turning plates are arranged behind the fine grating 12 through rolling shafts, and when initial rainwater and sewage collide on the turning plates, the speed is reduced, and the effect of reducing the flow speed is achieved. The movable baffle 17 is made of stainless steel and aluminum alloy in a mixing mode, is corrosion-resistant, impact-resistant, simple to install and long in service life, and plays a role in further reducing the flow speed. The water delivery tank 15 is made of aluminum plate. The valve well 16 is cast of concrete. The water pipe 18 is made of copper, and has the characteristics of durability, ageing resistance and bursting. After the initial rainwater and sewage are decelerated by the turning plate speed reducer 14, the flow velocity is further reduced when the initial rainwater and sewage meet the movable baffle 17, then the initial rainwater and sewage enter the detention device 3 from top to bottom, the detention time is prolonged, and then the initial rainwater and sewage are distributed to the undercurrent ascending type artificial wetland 4 by the water conveying pipe 18.
The plant planting area 19 absorbs, utilizes and adsorbs the enriched pollutants, and transmits oxygen to the wetland system, so as to provide oxygen required by growth, reproduction and degradation of microorganisms in the root area, maintain and strengthen hydraulic transmission in the artificial wetland system, and maintain the stability of the system. The artificial filler layer 24 achieves the purpose of biological nitrogen and phosphorus removal by providing suitable conditions for microorganism attachment and growth in the plant planting area. The sandstone layer 25 may be filtered to remove water contaminants. The gravel layer 26 protects the permeation preventive film 27 laid to prevent sewage from permeating downward. The base ramming layer 28 serves to provide a stable pressure bearing surface. Volcanic rocks in the water distribution area 20 and the water collection area 29 ensure that the constructed wetland has uniform water distribution and uniform water collection. A water collecting channel 31 is arranged beside the artificial wetland 4, the left side of the water collecting channel 31 is provided with a water inlet 30, and the right side of the water collecting channel 31 is provided with a water outlet 32. The initial rainwater and sewage are delivered to the artificial wetland 4 through the water delivery pipe 18, and then are filtered, absorbed and purified from the middle of the artificial wetland 4 from bottom to top, and then a water storage layer 21 is formed at the plant planting area 19. When the water storage layer 21 is higher than the water inlet 30, the water flows into the water collecting channel 31, and finally, the treated clean sewage and rainwater are discharged into the lake from the water outlet.
The initial rainwater runoff has the worst water quality, carries more than 80% of pollutants in the whole rainwater runoff, and the later rainwater is relatively clean. When the rainfall is small, initial rainwater and sewage are regulated and stored by the reservoir 5, impurities are intercepted by the coarse grids 9 and the fine grids 12, the detention time of water flow is prolonged by the detention device, and then the initial rainwater and the sewage flow into the undercurrent ascending type artificial wetland 4 with the purification function. When the rainfall is large, initial rainwater and sewage are treated by the arc-shaped regulation and storage tank 2, the detention device 3 and the undercurrent ascending type artificial wetland 4 in sequence and then discharged into the lake. When the water surface in the storage tank 2 is submerged by the marking line 8, the control valve 7 is opened, and relatively clean later-period rainwater is directly discharged into the lake through the straight-wall pipe 6.
Claims (5)
1. The artificial lake point source pollution detention purification artificial wetland is characterized in that:
the flow-converging rain and sewage pipe (1) is used for draining rain and sewage of a rain pipe network and a sewage pipe network;
the arc-shaped regulation and storage tank (2) is used for storing rain sewage drained by the confluence rain sewage pipe (1);
the detention device (3) is used for guiding the rain sewage in the arc regulation and storage tank (2), removing impurities, and reducing the flow rate of the rain sewage and controlling the flow rate;
the undercurrent ascending type artificial wetland (4) is used for treating the rainwater and sewage in the retention device (3) and discharging the rainwater and sewage into the artificial lake (33).
2. The artificial lake point source pollution retention and purification artificial wetland according to claim 1, which is characterized in that: the arc-shaped regulation and storage tank (2) comprises a water storage tank (5) for storing rain sewage, and a straight wall pipe (6) which is used for communicating the water storage tank (5) with the artificial lake (33) and is provided with a control valve (7);
and a marking line (8) for storing water is arranged in the water storage tank (5).
3. The artificial lake point source pollution retention and purification artificial wetland according to claim 2, which is characterized in that: the retention device (3) comprises a cleaning groove (10) for removing impurities in the rainwater and sewage, a coarse grid (9) for primarily filtering the impurities in the rainwater and sewage in the reservoir (5) entering the cleaning groove (10), a fine grid (12) installed in the cleaning groove (10) for further filtering the impurities in the rainwater and sewage, a water delivery tank (15) for storing the rainwater and sewage after impurity removal, a movable baffle (17) capable of sliding at the bottom of the water delivery tank (15), a valve well (16) for controlling flow, and a water delivery pipe (18) for delivering the rainwater and sewage into the subsurface flow ascending artificial wetland (4);
a pulling plate I (11) for cleaning sundries in the rain sewage is arranged in the cleaning groove (10) primarily filtered by the coarse grating (9);
and a pulling plate II (13) for cleaning sundries in the rainwater and sewage and a flap speed reducer (14) for reducing the flow speed of the rainwater and sewage are arranged in the cleaning groove (10) for filtering the sundries through the fine grating (12).
4. The artificial lake point source pollution retention and purification artificial wetland according to claim 3, which is characterized in that: the bottom of the undercurrent ascending type artificial wetland (4) is a basic tamping layer (28), the left side and the right side above the basic tamping layer (28) are respectively provided with a water distribution area (20) and a water collection area (29), and the middle part of the constructed wetland is sequentially provided with a plant planting area (19), a water storage layer (21), a bark covering layer (22), a planting soil layer (23), an artificial packing layer (24), a sand layer (25), a gravel layer (26) and an impermeable membrane (27) from top to bottom;
the water delivery pipe (18) in the retention device (3) is positioned between the gravel layer (26) and the impermeable membrane (27) so that rain sewage flows layer by layer from bottom to top;
and the filler in the water distribution area (20) and the water collection area (29) is volcanic rock.
5. The artificial lake point source pollution retention and purification artificial wetland according to claim 4, which is characterized in that: the artificial wetland sewage treatment system further comprises a water collecting channel (31) for storing the treated rainwater sewage, a water inlet (30) for communicating the subsurface flow ascending artificial wetland (4) with the water collecting channel (31), and a water outlet (32) for discharging the treated rainwater sewage in the water collecting channel (31) to flow into the artificial lake (33).
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Cited By (2)
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| CN113461163A (en) * | 2021-07-21 | 2021-10-01 | 广东思科赛思环境工程有限公司 | Sewage AW/MBBR treatment process and system thereof |
| WO2022007873A1 (en) * | 2020-07-09 | 2022-01-13 | 中建三局第二建设工程有限责任公司 | Assembled in situ ecological treatment system for overflow rain sewage |
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| CN113461163A (en) * | 2021-07-21 | 2021-10-01 | 广东思科赛思环境工程有限公司 | Sewage AW/MBBR treatment process and system thereof |
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Application publication date: 20200324 |