CN112499765A - Aerobic-anaerobic three-phase pulse type step water inlet wetland system - Google Patents
Aerobic-anaerobic three-phase pulse type step water inlet wetland system Download PDFInfo
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- CN112499765A CN112499765A CN202011503254.7A CN202011503254A CN112499765A CN 112499765 A CN112499765 A CN 112499765A CN 202011503254 A CN202011503254 A CN 202011503254A CN 112499765 A CN112499765 A CN 112499765A
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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
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
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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
- C02F3/006—Regulation methods for biological treatment
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/30—Organic compounds
Abstract
The invention provides an aerobic-anaerobic three-phase pulse type stepped water inlet wetland system, wherein a water distribution structure and a stepped water inlet pipe are arranged at the top and the side part of the wetland system, a water outlet is arranged at the bottom of the wetland system and is connected with a siphon water outlet pipe, the top of the siphon water outlet pipe is lower than the top of the wetland system to form pressure difference for periodic siphon water drainage, so that the area of the wetland system above an L-shaped vent pipe on the siphon water outlet pipe is an upper aerobic area, the area below the upper aerobic area is a lower anaerobic area, and the position of the L-shaped vent pipe can regulate and control the proportion of. The system provided by the invention solves the problems of insufficient carbon source, poor reoxygenation effect, high energy consumption and the like in the artificial wetland. The redistribution of the water inlet carbon source is realized through the step water inlet pipe, so that the utilization rate of the carbon source is improved; the periodic siphon drainage height is adjusted through the siphon drainage pipe and the L-shaped ventilation pipe, so that the upper aerobic zone is periodically in a gas-liquid-solid three-phase mixed state and is controllable in height, and the oxidation-reduction environment of the system is balanced.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an aerobic-anaerobic three-phase pulse type step water inlet wetland system.
Background
Although the total amount of fresh water resources in China is large and accounts for 6 percent of the global water resources, the water resources of people are scarce and are only about 30 percent of the average level in the world. With the rapid development of social economy, the problems of water resource shortage, poor water environment and the like are increasingly highlighted. Therefore, the efficient treatment of sewage and the reuse of water resources are the key points for ensuring the good development of social economy.
At present, water treatment processes in China are various, but the biological treatment method is mainly used. The current mainstream biological treatment methods can be classified into an activated sludge method and a biofilm method. The artificial wetland is used as one of the biomembrane methods, and is unique in a plurality of water treatment processes by the unique ecological effect. Compared with the traditional water treatment mode, the constructed wetland has the advantages of low investment, low operating cost, low energy consumption, low requirement on management level and the like, and is widely used for treating domestic sewage, industrial wastewater, storm runoff, eutrophic water and the like for years.
The artificial wetland is a water treatment ecosystem which is composed of mediums such as stones, sand, soil, coal slag and the like according to a certain proportion, is closed at the bottom and is selectively implanted into an artificial structure of aquatic vegetation, the purification capability of the artificial wetland is artificial enhancement of a natural purification process, and the artificial wetland comprises various actions such as microbial degradation, plant absorption, physical adsorption, chemical precipitation and the like, wherein aerobic respiration of microorganisms is an important way for the wetland to remove organic pollutants (COD (chemical oxygen demand) in the sewage, and nitrogen in the sewage is mainly removed through a nitrification and denitrification process of the microorganisms in an aerobic/anaerobic alternate environment inside the artificial wetland.
At present, the artificial wetland has a plurality of limiting factors in the practical engineering application. Numerous studies have shown that: in the traditional artificial wetland, the low dissolved oxygen level and the insufficient carbon source are main factors for limiting the low denitrification efficiency of the artificial wetland. The current artificial wetland oxygenation technology can be divided into an artificial aeration technology and an artificial intensified atmosphere reoxygenation technology according to the reoxygenation approach. Although artificial aeration is considered to be the most effective method for oxygen enrichment, continuous aeration causes a great increase in operating cost; the artificial strengthening atmosphere reoxygenation technology mainly comprises water dropping, oxygen increasing and water inlet, tide water inlet, a vent pipe, a wetland unsaturated layer and the like, and although the operation cost is reduced compared with the artificial aeration by the artificial strengthening atmosphere reoxygenation technology, the organic matter loss and the unbalanced redox conditions caused by excessive reoxygenation cannot be avoided, so that nitrogen cannot be effectively removed. In order to solve the problem of insufficient carbon source, researchers mainly add an additional carbon source, such as a soluble carbon source, a solid carbon source, a plant carbon source, and the like. But the adding amount of the soluble carbon source is not easy to control, and the soluble carbon source is easy to degrade aerobically in the artificial wetland and cannot play a role for a long time; the solid carbon source needs to be pre-embedded in the substrate of the artificial wetland in advance, the effect is stable, the supplement is not easy, and the cost is high; the plant carbon source is cheap and easy to obtain, but the effect is unstable and easy to interfere, and the color of the effluent is increased. Therefore, the current technology cannot meet the continuous efficient reoxygenation requirement and the efficient and stable denitrification requirement in the large-scale economic application of the wetland.
In conclusion, in the prior art, an effective solution is not available for the problems of poor reoxygenation effect, high energy consumption, insufficient carbon source, low removal rate of COD and nitrogen, organic fouling and the like in the artificial wetland.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an aerobic-anaerobic three-phase pulse type stepped water inlet wetland system, which realizes the redistribution of water inlet carbon sources through a water distribution pipe and a stepped water inlet pipe and improves the utilization rate of the carbon sources; the upper aerobic zone is periodically in a gas-liquid-solid three-phase mixed state through the periodical siphon drainage of the siphon drainage pipe, so that the mass transfer rate of gas can be improved, and efficient reoxygenation is realized; the proportion of the upper aerobic zone and the lower anaerobic zone is proper through the L-shaped vent pipe, a balanced oxidation-reduction environment is created, and removal of pollutants such as COD (chemical oxygen demand) and nitrogen in water is enhanced.
The invention provides the following technical scheme: the aerobic-anaerobic three-phase pulse type stepped water inlet wetland system comprises a main functional layer, a water inlet layer positioned at the top of the main functional layer, a water drainage layer positioned at the bottom of the main functional layer, a water inlet pipe which is positioned at the upper part of the water inlet layer and is connected with a plurality of water distribution pipes, a water outlet pipe positioned at the water drainage layer, stepped water inlet pipes uniformly distributed on the main functional layer and siphon water outlet pipes communicated with the water outlet pipes, wherein L-shaped vent pipes are arranged on the siphon water outlet pipes, a plurality of two-way joints uniformly distributed in parallel are uniformly distributed on the siphon water outlet pipes, the L-shaped vent pipes are communicated with the siphon water outlet pipes through one two-way joint, and the main functional layer is divided into an aerobic area at the upper part and an anaerobic area at; one end of the water distribution pipe is connected with the water inlet pipe, the other end of the water distribution pipe is closed, and the water distribution pipes are parallel to each other; the water inlet pipe is connected with a variable frequency water pump, and the step water inlet pipe is connected with a common water pump, so that pulse type water inlet of the water distribution pipe is realized;
the highest top of the siphon water discharge pipe is lower than the top of the wetland system so as to form pressure difference for periodic siphon water discharge;
the main functional layer is filled with small-particle-size filler, and wetland plants are planted on the water inlet layer;
the water distribution system comprises a plurality of water distribution pipes arranged at the top of the wetland system and a plurality of water inlet pipes connected with the water distribution pipes to form a pulse type water distribution system.
Further, the height of the water inlet layer is 5cm, and the height of the drainage layer is 10 cm.
Furthermore, the top and the side of the wetland system are respectively provided with an impulse type water distribution system and a step water inlet pipe, and the water distribution quantity of the impulse type water distribution system is greater than that of the step water inlet pipe.
Furthermore, the water inlet layer and the water discharge layer are filled with large-particle-size fillers.
Furthermore, the step water inlet pipes are arranged below the top of the wetland system by 20cm and are uniformly distributed on the same vertical axis at intervals of 10 cm.
Furthermore, a plurality of horizontal water distribution holes are arranged on the water distribution pipes, a plurality of horizontal water distribution holes are arranged on the step water inlet pipe, and the horizontal water distribution holes of two adjacent water distribution pipes are distributed at intervals along the horizontal direction.
Further, the siphon drain pipe is the type of falling U structure, siphon drain pipe first opening with outlet pipe intercommunication, first opening unsettled extremely be less than outlet pipe 5cm department, in order to form continuous pressure differential siphon drainage when the siphon takes place.
Furthermore, the uniformly arranged spacing distance between the two-way joint and the siphon drain pipe is 10 cm; the two-way joint at the highest position is 20cm away from the top of the wetland system, and the two-way joint at the lowest position is 10cm away from the bottom of the wetland system; the L-shaped breather pipe can be connected with the siphon drain pipe at any two-way joint through a screw sleeve.
Furthermore, the two-way joint and the inverted U-shaped siphon drain pipe are not overlapped on the vertical axial plane, and the L-shaped vent pipe and the inverted U-shaped siphon drain pipe are not overlapped on the vertical axial plane.
Further, the L-shaped vent pipe is equal to the wetland system in height.
The invention has the beneficial effects that:
1. the wetland system provided by the invention realizes the redistribution of the water inlet carbon source. Compared with the traditional artificial wetland, the water distribution structure and the stepped water inlet pipe adopted by the wetland for water inlet can realize step-by-step water inlet, thereby avoiding excessive consumption of a carbon source in an aerobic area, improving the utilization rate of the carbon source, providing necessary energy for subsequent denitrification of the artificial wetland system, and further improving the denitrification capability of the wetland system. The method solves the problems of insufficient carbon source, poor reoxygenation effect, high energy consumption and the like in the artificial wetland. The redistribution of the water inlet carbon source is realized through the step water inlet pipe, so that the utilization rate of the carbon source is improved; the periodic siphon drainage height is adjusted through the siphon drainage pipe and the L-shaped ventilation pipe, so that the upper aerobic zone is periodically in a gas-liquid-solid three-phase mixed state and is controllable in height, and the oxidation-reduction environment of the system is balanced.
2. The pulse type water distribution structure arranged in the wetland system can realize pulse type water inflow through the variable frequency water pump, so that water to be treated can be uniformly distributed on the surface of the wetland system.
3. Compared with the traditional constructed wetland, the siphon drainage height controller arranged on the effluent of the wetland system creates an oxygen mass transfer condition with coexisting gas-liquid-solid three phases for the upper part of the wetland system, enhances the gas mass transfer efficiency of the constructed wetland system, is beneficial to biological growth, and realizes better water quality purification effect.
4. The upper part of the wetland system provided by the invention can achieve a periodical submerging and emptying state through the siphon drain pipe and the L-shaped vent pipe, and compared with the traditional artificial wetland, the alternate aerobic/anaerobic state of the upper part of the wetland system is beneficial to intercepting the mineralization and degradation of organic matters, thereby effectively reducing the organic blocking risk of a water inlet layer.
5. The wetland system provided by the invention can realize proportion regulation and control of the upper aerobic zone and the lower anaerobic zone through the installation position of the L-shaped vent pipe, create a more balanced oxidation-reduction environment and strengthen removal of pollutants such as COD (chemical oxygen demand) and nitrogen in water.
6. The wetland system provided by the invention has the advantages that wetland plants planted on the surface of the wetland system can play an auxiliary purification role, and the aesthetic angle also brings ornamental value to the whole wetland system.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
fig. 1 is a front view of a wetland system provided by the present invention;
fig. 2 is a right side view of the wetland system provided by the invention;
fig. 3 is a top view of the wetland system provided by the present invention;
in the figure, 1: inlet tube, 2: water inlet layer, 3: main functional layer, 4: drainage layer, 5: small particle size filler, 6: step water distribution pipe, 7: water outlet pipe, 8: anaerobic zone, 9: aerobic zone, 10: water distributor, 11: large particle size filler, 12: l-shaped vent pipe, 13: siphon drain, 14: wetland plants, 15: a two-way joint.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1-3, the aerobic-anaerobic three-phase pulse type stepped water inlet wetland system provided by the invention comprises a main functional layer 3, a water inlet layer 2 positioned at the top of the main functional layer 3, a water outlet layer 4 positioned at the bottom of the main functional layer 3, the water inlet pipe 1 is connected with a plurality of water distribution pipes 10 and is positioned at the upper part of the water inlet layer 2, the water outlet pipe 7 is positioned at the water outlet layer 4, the step water inlet pipe 6 is uniformly distributed on the main functional layer 3, and the siphon water outlet pipe 13 is communicated with the water outlet pipe 7, an L-shaped vent pipe 12 is arranged on the siphon water outlet pipe 13, a plurality of two-way joints 15 are uniformly distributed on the siphon water outlet pipe 13 in parallel, the L-shaped vent pipe 12 is communicated with the siphon water outlet pipe 13 through one two-way joint 15, and the horizontal plane of the vent 12-1 divides the main functional layer 3 into an upper aerobic zone 9; one end of the water distribution pipe 10 is connected with the water inlet pipe 1, the other end is closed, and the water distribution pipes 10 are parallel to each other; the water inlet pipe 1 is connected with a variable frequency water pump, and the step water inlet pipe is connected with a common water pump, so that pulse type water inlet of the water distribution pipe is realized;
the highest top of the siphon water discharge pipe 13 is lower than the top of the wetland system so as to further form pressure difference for periodical siphon water discharge;
the main functional layer 3 is internally filled with a small-particle-size filler 5 with the particle size of 3-5 mm, and wetland plants 14 are planted on the water inlet layer 2;
the pulse type water distribution system is formed by a plurality of water distribution pipes 10 arranged at the top of the wetland system and the water inlet pipe 1 connected with the plurality of water distribution pipes 10. The top and the side of the wetland system are provided with an impulse type water distribution structure and a step water inlet pipe 6, and the impulse type water distribution structure comprises a water inlet pipe 1 and a water distribution pipe 10. The water distribution pipes 10 are parallel to each other, one end of each water distribution pipe is connected with the water inlet pipe 1, and the other end of each water distribution pipe is closed. The water distribution pipes and the step water inlet pipe are provided with a plurality of horizontal water distribution holes, and the water distribution holes of adjacent water distribution pipes are distributed at intervals so as to ensure the uniformity of subsequent pulse type water distribution on the surface of the wetland system.
The bottom of the wetland system is provided with the water outlet pipe 7 which is connected with the siphon water outlet pipe 13 and the L-shaped vent pipe 12, the siphon water outlet pipe 13 and the L-shaped vent pipe 12 can realize the setting of the periodic water drainage and the water drainage height of the wetland system by respectively utilizing the principles of siphoning and a communicating vessel, so that the wetland substrate above the L-shaped vent pipe 12 is continuously exposed in a gas phase for efficient reoxygenation, the efficient oxygen supply of the wetland is realized, and the high-energy-consumption aeration is avoided. And then an aerobic environment is formed above the L-shaped vent pipe 12, an anaerobic environment is formed below the L-shaped vent pipe, and water to be treated sequentially flows through an aerobic zone periodically in gas-liquid-solid three-phase mixing and an anaerobic zone continuously maintaining the anaerobic environment, so that necessary redox conditions are provided for the biofilm on the surface of the filler to efficiently remove total nitrogen, and a better water quality purification effect is realized.
Wherein, the height of the water inlet layer 2 is 5cm, and the height of the drainage layer 4 is 10 cm.
The top and the side of the wetland system are respectively provided with an impulse type water distribution system and a step water inlet pipe, and the water distribution quantity of the impulse type water distribution system is larger than that of the step water inlet pipe.
The water inlet layer 2 and the water outlet layer 4 are both filled with large-particle-size filler 11 with the particle size of 5-8 mm. The drainage layer 4 and the water inlet layer 2 are made of 5-8 mm large-particle-size ceramsite fillers 11 to prevent the drainage layer and the water inlet layer from being blocked, and the main functional layer 3 of the wetland system is made of 3-5 mm small-particle-size ceramsite fillers 5 to increase the specific surface area and load a large number of biological films, so that the efficient water quality purification effect is realized.
Wetland plants 14 are arranged on the top of the wetland system. The wetland plants are arranged at the top of the wetland system, so that the auxiliary purification effect can be achieved.
The step water inlet pipes 6 are arranged below the top of the wetland system by 20cm and are uniformly distributed on the same vertical axis at intervals of 10 cm. The water distribution pipes 10 are provided with a plurality of horizontal water distribution holes, the step water inlet pipe 6 is provided with a plurality of horizontal water distribution holes, and the horizontal water distribution holes of two adjacent water distribution pipes 10 are distributed at intervals along the horizontal direction.
The siphon drain pipe 13 is of an inverted U-shaped structure, a first opening 13-1 of the siphon drain pipe 13 is communicated with the water outlet pipe 7, and the first opening 13-2 is suspended to be slightly lower than the water outlet pipe by 75 cm, so that pressure difference is formed to carry out periodical siphon drainage. The siphon drain pipe 13 is of an inverted U-shaped structure, one end of the inverted U-shaped structure is communicated with the water outlet of the wetland system, and the other end of the inverted U-shaped structure is suspended to be slightly lower than the water outlet of the wetland system; the uniformly arranged spacing distance between the two-way joint 15 and the siphon drain pipe 13 is 10 cm; the distance between the two-way joint 15 at the highest position and the top of the wetland system is 20cm, and the distance between the two-way joint 15 at the lowest position and the bottom of the wetland system is 10 cm. The L-shaped breather pipe 12 can be connected with the siphon drain pipe 13 at any two-way joint 15 through a threaded sleeve to realize the control of the height of siphon drain, thereby controlling the proportion of the aerobic zone 9 and the anaerobic zone 8, creating more coordinated oxidation-reduction environment for the wetland system and further strengthening the removal of pollutants such as COD (chemical oxygen demand) and nitrogen in the water body.
The two-way joint 15 and the inverted U-shaped siphon drain pipe 13 are not overlapped on the vertical axial plane, and the inverted U-shaped siphon drain pipe 13 of the L-shaped vent pipe 12 is not overlapped on the vertical axial plane. The two-way joints 15 are parallel to each other, the vertical axial plane is not coincided with the inverted U-shaped drain pipe, the L-shaped vent pipe 12 is not coincided with the inverted U-shaped drain pipe, and the length of the L-shaped vent pipe 12 is equal to the height of the wetland system so as to meet the control requirements of different siphon drainage heights.
Further, the height of the L-shaped vent pipe is equal to that of the wetland system.
The invention realizes intermittent water inlet and periodic water discharge through the matching of the water distribution structure, the step water inlet pipe 6, the siphon water discharge pipe 13 and the L-shaped vent pipe 12, and a treatment period is from the end of one-time water discharge to the end of the next siphon water discharge. In one period, part of water to be treated firstly enters the wetland system water inlet layer 2 from top to bottom through the water distribution structure and enters the wetland system main functional layer 3 under the action of gravity, and then the other part of water to be treated enters the wetland system main functional layer 3 through the step water inlet pipe and flows upwards in a plug flow manner, so that the liquid level of the wetland system is higher than the top of the siphon water outlet pipe 13, periodic siphon drainage is realized, and when the wetland system drains to the bottom of the L-shaped vent pipe 12, the siphon is broken, and the next water treatment period is started.
Based on the intermittent water inflow and periodic siphon drainage processes, most of the water to be treated is in the wetland system aerobic zone above the bottom end of the L-shaped breather pipe 12, COD is greatly consumed, and part of ammonia nitrogen is oxidized into nitrate nitrogen; then part of the water enters a main functional area 3 of the matrix system through a step water inlet pipe 6, and an organic carbon source is supplemented; in the lower anaerobic zone 8, the residual COD and supplemental organic carbon source are utilized as a carbon source for the denitrifying bacteria to reduce nitrate, which is reduced to nitrogen gas for discharge from the system.
The wetland system provided by the invention overcomes the problems of poor reoxygenation effect, high energy consumption, insufficient carbon source, low COD and nitrogen removal rate, organic pollution blockage and the like in the traditional and improved artificial wetlands in the prior art.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. Good oxygen-anaerobism three-phase pulsed step wetland system of intaking, its characterized in that, wetland system includes main functional layer (3), is located water inlet layer (2) at main functional layer (3) top, is located drainage blanket (4) of main functional layer (3) bottom, is located intake pipe (1) that water inlet layer (2) upper portion is connected with a plurality of water-distribution pipes (10), is located outlet pipe (7) of drainage blanket (4), evenly distributed in step inlet pipe (6) of main functional layer (3) and with siphon drain pipe (13) that outlet pipe (7) are linked together, be provided with L type breather pipe (12) on siphon drain pipe (13), evenly distributed is provided with a plurality of evenly parallel distribution's two-way connection (15) on siphon drain pipe (13), L type breather pipe (12) through one two-way connection (15) with siphon drain pipe (13) intercommunication, the horizontal plane of the vent (12-1) divides the main functional layer (3) into an upper aerobic zone (9) and a lower anaerobic zone (8); one end of the water distribution pipe (10) is connected with the water inlet pipe (1), the other end of the water distribution pipe is closed, and the water distribution pipes (10) are parallel to each other; the water inlet pipe (1) is connected with a variable frequency water pump, and the step water inlet pipe is connected with a common water pump;
the highest top of the siphon water discharge pipe (13) is lower than the top of the wetland system;
the main functional layer (3) is filled with small-particle-size filler (5), and wetland plants (14) are planted on the water inlet layer (2);
the water distribution system is characterized in that the plurality of water distribution pipes (10) arranged at the top of the wetland system and the water inlet pipe (1) connected with the plurality of water distribution pipes (10) form a pulse type water distribution system.
2. The aerobic-anaerobic three-phase pulse type stepped inflow wetland system according to claim 1, wherein the height of the inflow layer (2) is 5cm, and the height of the drainage layer (4) is 10 cm.
3. The aerobic-anaerobic three-phase pulse type stepped water inlet wetland system as recited in claim 1, wherein the top and the side of the wetland system are respectively provided with a pulse type water distribution system and a stepped water inlet pipe, and the water distribution capacity of the pulse type water distribution system is greater than that of the stepped water inlet pipe.
4. The aerobic-anaerobic three-phase pulse type stepped water inlet wetland system as claimed in claim 1, wherein the water inlet layer (2) and the water outlet layer (4) are filled with large-particle-size filler (11).
5. The aerobic-anaerobic three-phase pulse type stepped water inlet wetland system as claimed in claim 1, wherein the stepped water inlet pipes (6) are arranged below 20cm of the top of the wetland system and are uniformly distributed on the same vertical axis at intervals of 10 cm.
6. The aerobic-anaerobic three-phase pulse type stepped inflow wetland system according to claim 1, wherein a plurality of horizontal water distribution holes are arranged on the water distribution pipes (10), a plurality of horizontal water distribution holes are arranged on the stepped inflow pipe (6), and the horizontal water distribution holes of two adjacent water distribution pipes (10) are distributed at intervals along the horizontal direction.
7. The aerobic-anaerobic three-phase pulse type stepped water inlet wetland system as claimed in claim 1, wherein the siphon water outlet pipe (13) is of an inverted U-shaped structure, the first opening (13-1) of the siphon water outlet pipe (13) is communicated with the water outlet pipe (7), and the first opening (13-2) is suspended to be lower than the water outlet pipe (7).
8. The aerobic-anaerobic three-phase pulse type stepped inflow wetland system as claimed in claim 1, wherein the two-way joint (15) is spaced at a distance of 10cm from the siphon drain pipe (13); the two-way joint (15) at the highest position is 20cm away from the top of the wetland system, and the two-way joint (15) at the lowest position is 10cm away from the bottom of the wetland system.
9. The aerobic-anaerobic three-phase pulse type stepped water inlet wetland system as claimed in claim 8, wherein the two-way joint (15) and the inverted U-shaped siphon water outlet pipe (13) are not overlapped on a vertical axial plane, and the L-shaped ventilation pipe (12) and the inverted U-shaped siphon water outlet pipe (13) are not overlapped on a vertical axial plane.
10. The aerobic-anaerobic three-phase pulse type stepped inflow wetland system as claimed in claim 1, wherein the L-shaped vent pipe is equal to the wetland system in height.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114873731A (en) * | 2022-04-11 | 2022-08-09 | 同济大学 | Combined artificial wetland and treatment process and application thereof |
| CN115340184A (en) * | 2022-07-25 | 2022-11-15 | 悉地（苏州）勘察设计顾问有限公司 | Anti-blocking type biological detention pond system and working method thereof |
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2020
- 2020-12-18 CN CN202011503254.7A patent/CN112499765A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114873731A (en) * | 2022-04-11 | 2022-08-09 | 同济大学 | Combined artificial wetland and treatment process and application thereof |
| CN115340184A (en) * | 2022-07-25 | 2022-11-15 | 悉地（苏州）勘察设计顾问有限公司 | Anti-blocking type biological detention pond system and working method thereof |
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