CN113104982A - System and method for enhancing pollutant degradation at low temperature - Google Patents
System and method for enhancing pollutant degradation at low temperature Download PDFInfo
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- CN113104982A CN113104982A CN202110320894.2A CN202110320894A CN113104982A CN 113104982 A CN113104982 A CN 113104982A CN 202110320894 A CN202110320894 A CN 202110320894A CN 113104982 A CN113104982 A CN 113104982A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/02—Fluid flow conditions
Abstract
The invention belongs to the technical field of water body purification, and particularly relates to a system and a method for strengthening pollutant degradation at low temperature. The system comprises: the artificial wetland comprises an artificial wetland body, a magnetic material and a guide plate; the magnetic materials are vertically and vertically staggered in the artificial wetland, and a guide plate is adopted to replace part of the magnetic materials in the overlapping area of two adjacent magnetic materials and the area close to the ground, so that the magnetic field is uniformly distributed; the magnetic material and the guide plate form a blocking device, so that the sewage forms a wave-shaped undercurrent in the artificial wetland. Based on the magnetic effect generated by the introduction of the magnetic material, the structure and the skeleton of the microbial cell membrane can be changed, so that certain microbes generate stronger resistance to low-temperature conditions to adapt to the low-temperature environment, and the sewage is in a wave flow state in the artificial wetland due to the staggered magnetic material wave form and is more fully contacted with the substrate; the system is suitable for treating urban domestic sewage and industrial wastewater at the temperature of 4-15 ℃.
Description
Technical Field
The invention belongs to the technical field of water body purification, and particularly relates to a system and a method for strengthening pollutant degradation at low temperature.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In recent years, new and emerging processes related to sewage treatment emerge endlessly, and artificial wetlands have received wide attention by virtue of the advantages of low investment, stable effect, convenient management, environmental friendliness and the like. However, the activity of microorganisms and plants in the wetland is reduced and even the microorganisms and the plants die in the low-temperature environment, and as the activity of the microorganisms in the substrate is reduced, the particulate matters cannot be effectively degraded, the viscosity of water is increased, the porosity is reduced, the oxygen transfer rate is reduced, and the oxygen content of the substrate is reduced, so that the decontamination effect of the artificial wetland is seriously influenced and the use of the technology under the winter or low-temperature conditions is limited.
Therefore, the research on how to strengthen the decontamination effect of the artificial wetland under the low-temperature condition has certain significance. The main measures adopted at present comprise artificial heat preservation measures, planting of cold-resistant wetland plants, combination with other processes and the like, the measures can enhance the pollutant removal effect of the artificial wetland in a low-temperature environment to a certain extent, but also have certain limitations such as overlarge investment, complex maintenance, insignificant effect and the like. Therefore, the technology which is simple to operate, economic and effective is provided to strengthen the decontamination effect of the artificial wetland in the low-temperature environment, is a key breakthrough for overcoming the time-space limitation of the artificial wetland technology in the application and popularization process, and is also a key for enabling the artificial wetland to be popularized and applied.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a system and a method for strengthening the degradation of pollutants at low temperature, which can change the cell membrane structure and the skeleton of microorganisms based on the magnetic effect generated by the introduction of a magnetic material, so that some microorganisms generate stronger resistance to the low temperature condition to adapt to the low temperature environment, and the sewage can be in a wave-shaped flow state in the artificial wetland and is more fully contacted with a substrate by the aid of the magnetic material and the guide plates which are distributed in a staggered manner; the system is an effective scheme capable of strengthening the decontamination effect, and is suitable for treating urban domestic sewage and industrial wastewater at the temperature of 4-15 ℃, aiming at the condition that the constructed wetland is susceptible to low temperature during operation in winter or under the low-temperature condition to reduce the pollutant removal effect.
In order to achieve the above object, a first aspect of the present invention provides a system for enhancing pollutant degradation at low temperature, comprising: the artificial wetland comprises an artificial wetland body, a magnetic material and a guide plate;
the magnetic materials are vertically and vertically staggered in the artificial wetland, and a guide plate is adopted to replace part of the magnetic materials in the overlapping area of two adjacent magnetic materials and the area close to the ground, so that the magnetic field is uniformly distributed;
the magnetic material and the guide plate form a blocking device, so that the sewage forms a wave-shaped undercurrent in the artificial wetland.
The invention provides a method for degrading pollutants at low temperature by adopting the system, which comprises the following steps:
sewage to be treated uniformly enters the artificial wetland through the water inlet pipe in a continuous water inlet mode, the sewage is in a wave-shaped flow state after passing through a blocking device consisting of a magnetic material and a guide plate, the sewage repeatedly passes through an aerobic area and an anaerobic area in the flowing process of the artificial wetland to effectively remove pollutants such as nitrogen, organic matters and the like, and the purified effluent is discharged through a drain pipe.
One or more embodiments of the present invention have at least the following advantageous effects:
(1) the invention adopts the magnetic material and the guide plate to form the blocking device, so that the sewage forms the wave-shaped undercurrent in the artificial wetland, the contact between the sewage in the artificial wetland and the matrix is more sufficient, and the removal effect of pollutants such as phosphorus, heavy metal and the like is promoted.
(2) Through the reinforcement of the magnetic material, the growth and metabolic activity of microorganisms in the artificial wetland are increased, the effects of nitrification, denitrification and the like are favorably enhanced, and the magnetic field generated by the magnetic material can also change the cell membrane structure and the skeleton of the microorganisms, so that certain microorganisms have stronger resistance to low-temperature conditions, and the artificial wetland is suitable for the low-temperature environment and is favorable for degrading pollutants in the low-temperature environment.
(3) The magnetic effect generated by the magnetic material can promote oxygen to be dissolved in water and generate active oxygen in the water, and the active oxygen groups or substances have stronger oxidation performance and can oxidize organic matters in the water. In addition, the reoxygenation capacity of the atmosphere is enhanced, which is beneficial to relieving the additional aeration amount of the artificial wetland so as to save the cost.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a system for enhanced low temperature contaminant degradation according to the present invention;
FIG. 2 is a top view of an inner water inlet pipe of the artificial wetland;
FIG. 3 is a layout view of an aeration apparatus;
FIG. 4 is a schematic structural view of the fixing device;
FIG. 5 is a top view of the body of the fixture;
wherein: 1: artificial wetland, 2: inlet tube, 3: a flow guide plate, 4: magnetic material, 5: fixing device, 6: aeration apparatus, 7: aeration guide pipe, 8: blower, 9: plant, 10: fine sand layer, 11: filler, 12: blocking device, 13: magnetite, 14: support layer, 15: and a water discharge pipe.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
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 exemplary embodiments according to the invention. 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 introduced in the background art, the existing method for enhancing the decontamination effect of the artificial wetland under the low-temperature condition has the problems of overlarge investment, complex maintenance, insignificant effect and the like, and in order to solve the technical problems, the invention provides a system for enhancing the degradation of pollutants at the low temperature, which comprises the following steps: the artificial wetland comprises an artificial wetland body, a magnetic material and a guide plate;
the magnetic materials are vertically and vertically staggered in the artificial wetland, and a guide plate is adopted to replace part of the magnetic materials in the overlapping area of two adjacent magnetic materials and the area close to the ground, so that the magnetic field is uniformly distributed;
the magnetic material and the guide plate form a blocking device, so that the sewage forms a wave-shaped undercurrent in the artificial wetland.
Wherein, the magnetic material is a material which can generate a stable magnetic field in the artificial wetland; the magnetic materials which are vertically and staggered up and down have the phenomenon of uneven magnetic field distribution in the overlapping area of two adjacent magnetic materials and the area close to the ground, so that the formation of the waveform undercurrent is influenced. In addition, the amount of the guide plate replacing the magnetic material is not specially limited, and the substitution amount of the guide plate can be measured according to the requirement as long as the purpose of uniform magnetic field can be finally realized due to different influences of different magnetic materials on the uniformity of the magnetic field.
Preferably, the magnetic material is a permanent magnet, more preferably a rare earth permanent magnet material, and still more preferably a neodymium iron boron magnet;
the magnetic material is in a cuboid shape, the ratio of the height to the distance is 1: 1-1: 3, and the internal magnetic field intensity of the artificial wetland is 50-100 mT.
The invention provides a blocking device composed of a magnetic material and a guide plate, which is vertically arranged in an artificial wetland and mainly aims at three aspects:
(1) the blocking device can enable the sewage to be in a wave-shaped flow state in the artificial wetland, so that the sewage in the artificial wetland is more fully contacted with the matrix, and the removal effect of pollutants such as phosphorus, heavy metals and the like is promoted.
The wave-shaped subsurface flow refers to that the internal sewage is in a mixed flow state including horizontal flow, upstream flow and downstream flow, the advantages of the water semi-subsurface flow wetland and the vertical subsurface flow wetland can be integrated, the sewage passes through structural layers with different treatment characteristics in the wetland for many times, and is fully contacted with microorganisms and substrates at the lower layer in a wetland system, the hydraulic retention time of the sewage in the wetland is increased, organic nutrient substances are fully degraded, and the wetland bed body exerts great efficiency, so that the aim of enhancing sewage treatment is fulfilled.
(2) The structure of the microbial cell membrane is changed, and the low-temperature resistance of the microbial cell membrane is increased. The magnetic field generated by the magnetic material can change the structure and the skeleton of the microbial cell membrane, so that certain microbes generate stronger resistance to low-temperature conditions to adapt to the low-temperature environment and be beneficial to the degradation of pollutants in the low-temperature environment.
(3) Removing organic pollutants in the sewage. The magnetic effect generated by the magnetic material can promote oxygen to be dissolved in water and generate active oxygen in the water, and the active oxygen groups or substances have stronger oxidation performance and can oxidize organic matters in the water.
Based on the effects, the blocking device formed by the magnetic material and the guide plate is vertically arranged in the artificial wetland, so that the problem that the artificial wetland is easily influenced by low temperature in winter or under low-temperature conditions to reduce the pollutant removal effect is solved, and the system is suitable for treating urban domestic sewage and industrial wastewater at the temperature of 4-15 ℃.
In one or more embodiments of the invention, the height of the blocking device is greater than 2/3 of the depth of the artificial wetland, and the wave-shaped flow state of the sewage can be influenced by the too high blocking device, and the flow of the sewage in the artificial wetland system can be limited.
In one or more embodiments of the invention, the artificial wetland is internally provided with a plant, a fine sand layer, a mixed layer of a filler and waste magnetite, a bearing layer and an aeration device from top to bottom in sequence.
Preferably, the plants planted on the upper part of the artificial wetland are cold-resistant plants with a long growth cycle, and include, but are not limited to, Siberian iris, Iris floribunda, Oenanthe javanica, rush, saxifrage and Acorus calamus, and one or more of the plants can be selected for planting.
Preferably, the fine sand layer consists of fine sand with a particle size <0.5 cm.
Preferably, the bearing layer is composed of crushed stones with the particle size of 6-10 cm.
Preferably, the diameter of the mixture of the filled filler and the waste magnetite ore is 1-3 cm, the ratio of the waste magnetite ore to the filler is 1: 3-1: 10, and the filler includes but is not limited to one or more of limestone, volcanic rock, zeolite, shale, ceramsite, slag, gravel and the like. Waste magnetite is added into the artificial wetland, so that not only is waste recycling realized, but also the magnetization area can be further expanded to enhance the magnetization effect inside the system.
Preferably, the blocking means does not protrude above the fine sand layer.
In one or more embodiments of the invention, the system is further provided with a water inlet pipe, the water inlet pipe is positioned below the fine sand layer, and the water outlet pipe is positioned on the bearing layer and is provided with valves.
In one or more embodiments of the invention, the length of the water inlet pipe in the artificial wetland must not exceed the distance between the edge of the artificial wetland and the nearest blocking device, and must not be less than half of the distance;
preferably, the surface of the water inlet pipe in the artificial wetland is wrapped with gauze, and water distribution holes are uniformly distributed on the pipe wall.
In one or more embodiments of the invention, the aeration device is a microporous aeration pipe and is arranged between the artificial wetland (the side with the water inlet pipe) and the nearest blocking device, and the aeration device is connected with a blower through an aeration guide pipe to realize atmospheric reoxygenation, so that the content of dissolved oxygen in the artificial wetland is 2-3 mg/L.
In one or more embodiments of the invention, the constructed wetland is divided into an aerobic zone and an anaerobic zone by a blocking device consisting of a magnetic material and a flow guide plate, an aeration device arranged at the bottom of the constructed wetland and atmospheric reoxygenation, the range of the aeration device and the atmospheric reoxygenation is the aerobic zone of the constructed wetland, and the rest part is the anaerobic zone of the constructed wetland.
In one or more embodiments of the invention, the magnetic material and the baffle are fixed by a fixing device.
Preferably, fixing device is the stainless steel material of non-magnetism nature, and this fixing device main part is the cuboid, and the size is decided according to magnet and guide plate size, puts into wherein magnet and guide plate for the convenience, and any processing is not done to its upper surface, and five faces are X shape fretwork entirely in addition, adopt the stainless steel pipe of same quality to connect between two cuboids.
The invention provides a method for degrading pollutants at low temperature by adopting the system, which comprises the following steps:
sewage to be treated uniformly enters the artificial wetland through the water inlet pipe in a continuous water inlet mode, the sewage is in a wave-shaped flow state after passing through a blocking device consisting of a magnetic material and a guide plate, the sewage repeatedly passes through an aerobic area and an anaerobic area in the flowing process of the artificial wetland to effectively remove pollutants such as nitrogen, organic matters and the like, and the purified effluent is discharged through a drain pipe.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Example 1
According to the system, a small test device of the wave-shaped subsurface flow constructed wetland is constructed in a laboratory, and is a cuboid, the length of the small test device is 100cm, the width of the small test device is 30cm, and the height of the small test device is 60 cm.
The artificial wetland is internally and sequentially provided with a plant, a fine sand layer, a mixed layer of filler and waste magnetite, a bearing layer and an aeration device from top to bottom. The length of the water inlet pipe in the artificial wetland is 20cm, the diameter of the water inlet hole is 0.7cm, and the surface of the water inlet pipe is wrapped by gauze. Siberian iris is planted on the artificial wetland upper part. The fine sand layer is composed of fine sand with particle size less than 0.3cm, and the thickness is 10 cm. The bearing layer is composed of crushed stones with the particle size of 6-8 cm, and the thickness of the bearing layer is 15 cm. The thickness of the mixing layer is 35cm, a mixture of gravel and waste magnetite ore is filled in the mixing layer, the diameter of the mixture is 1-3 cm, and the ratio of the magnetite ore to the gravel is 1: 4. Three blocking devices are arranged in the artificial wetland in a staggered mode, the horizontal interval between the two blocking devices is 25cm, the length of each blocking device is 20cm, the width of each blocking device is 5cm, and the height of each blocking device is 40 cm. The first blocking device is placed on the fine sand layer and the mixed layer, the upper part of the device is a 20 multiplied by 5 multiplied by 10cm guide plate, and the lower part of the device is a 20 multiplied by 5 multiplied by 30cm neodymium iron boron magnet. The second blocking device is placed on the mixed layer and the supporting layer, and the upper part of the device is a 20 multiplied by 5 multiplied by 20cm guide plate, and the lower part of the device is a 20 multiplied by 5 multiplied by 20cm neodymium iron boron magnet. The internal magnetic field intensity of the artificial wetland is 50-100 mT. The fixing device is made of 316 type austenitic stainless steel materials, the main body of the fixing device is a cuboid, the height of the fixing device is 40cm, the length of the fixing device is 20.5cm, the width of the fixing device is 5.5cm, magnets are placed in the fixing device conveniently, the upper surface of the fixing device is not processed, and in addition, the five surfaces of the fixing device are all in a X-shaped hollow shape. The two cuboids are connected by a 316-type austenitic stainless steel pipe with the length of 25 cm. A micropore aeration pipe with the length of 50cm is arranged at the bottom of the artificial wetland, a flow meter can be arranged between the aeration device and the blower, and the aeration device, the blower and the flow meter are connected through an aeration guide pipe to realize oxygenation of the artificial wetland. And controlling the flow meter to enable the content of dissolved oxygen in the artificial wetland to be 2-3 mg/L during the aeration period.
The temperature of the artificial wetland is 4-15 ℃, a continuous water inlet mode is adopted, the TN concentration of a water body entering a water inlet pipe is controlled to be 40mg/L, the COD concentration is 200mg/L, the TP concentration is 5mg/L, the water inlet concentration of heavy metal Mn is 5mg/L, and the water inlet concentration of heavy metal Cu is 5 mg/L.
After the treatment by the process in the embodiment, the average effluent concentrations of TN, COD, TP, Mn and Cu in the water body respectively reach 12.3mg/L, 20.18mg/L, 0.56mg/L, 1.12mg/L and 0.76 mg/L.
Example 2
An experimental constructed wetland is constructed in a suburban area of Shaanxi province according to the method, the length of the constructed wetland is 8.4m, the width of the constructed wetland is 3m, and the height of the constructed wetland is 2.1 m.
The artificial wetland is internally and sequentially provided with a plant, a fine sand layer, a mixed layer of filler and waste magnetite, a bearing layer and an aeration device from top to bottom. The length of the water inlet pipe in the artificial wetland is 80cm, and the surface of the water inlet pipe is wrapped by gauze. The artificial wetland is used for planting cress on the upper part of the wetland. The fine sand layer is composed of fine sand with particle size less than 0.5cm, and the thickness is 30 cm. The bearing layer is composed of 8-10 cm-diameter broken stones, and the thickness of the bearing layer is 40 cm. The thickness of the mixing layer is 140cm, a mixture of gravel and waste magnetite ore is filled in the mixing layer, the diameter of the mixture is 3-5 cm, and the ratio of the magnetite ore to the gravel is 1: 3. Six blocking devices are arranged in the artificial wetland in a staggered mode, the horizontal interval between the two blocking devices is 120cm, the length of each blocking device is 5m, the width of each blocking device is 0.5m, and the height of each blocking device is 1.4 m. The first blocking device is placed on the fine sand layer and the mixed layer, and a guide plate of 5 multiplied by 0.5 multiplied by 0.3m is arranged above the device, and a neodymium iron boron magnet of 5 multiplied by 0.5 multiplied by 1.1m is arranged below the device. The second blocking device is placed on the mixing layer and the supporting layer, the upper part of the device is a guide plate of 5 multiplied by 0.5 multiplied by 0.9m, the lower part of the device is a neodymium iron boron magnet of 5 multiplied by 0.5m, the third and the fifth blocking devices are consistent with the first one, and the fourth and the sixth blocking devices are consistent with the second one. The internal magnetic field intensity of the artificial wetland is 50-100 mT. The fixing device is made of 316 type austenitic stainless steel materials, the main body of the fixing device is a cuboid, the height of the fixing device is 1.4m, the length of the fixing device is 5.1m, the width of the fixing device is 0.55m, magnets are placed in the fixing device conveniently, the upper surface of the fixing device is not processed, and in addition, the five surfaces of the fixing device are all in an X shape hollow. The two cuboids are connected by a 316 type austenitic stainless steel pipe. A micropore aeration pipe with the length of 2.4m is arranged at the bottom of the artificial wetland, and an aeration device is connected with an air blower through an aeration guide pipe, so that the content of dissolved oxygen in the artificial wetland is 2-3 mg/L.
The temperature of the artificial wetland is 10-15 ℃, a continuous water inlet mode is adopted, the TN concentration of a water body entering a water inlet pipe is controlled to be 80mg/L, the COD concentration is 400mg/L, the TP concentration is 10mg/L, the water inlet concentration of heavy metal Mn is 10mg/L, and the water inlet concentration of heavy metal Cu is 10 mg/L.
By the process treatment of the embodiment, the average effluent concentrations of TN, COD, TP, Mn and Cu in the water body respectively reach 22.4mg/L, 56.18mg/L, 2.37mg/L, 3.12mg/L and 2.13 mg/L.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A system for enhancing contaminant degradation at low temperatures, comprising: the method comprises the following steps: the artificial wetland comprises an artificial wetland body, a magnetic material and a guide plate;
the magnetic materials are vertically and vertically staggered in the artificial wetland, and a guide plate is adopted to replace part of the magnetic materials in the overlapping area of two adjacent magnetic materials and the area close to the ground, so that the magnetic field is uniformly distributed;
the magnetic material and the guide plate form a blocking device, so that the sewage forms a wave-shaped undercurrent in the artificial wetland.
2. The system of claim 1, wherein: the height of the blocking device is greater than 2/3 of the depth of the artificial wetland.
3. The system of claim 1, wherein: the artificial wetland is internally provided with a plant, a fine sand layer, a mixed layer of a filler and waste magnetite, a bearing layer and an aeration device from top to bottom in sequence;
preferably, the blocking means does not protrude above the fine sand layer.
4. The system of claim 3, wherein: the system is also provided with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is positioned below the fine sand layer, and the water outlet pipe is positioned on the bearing layer and is provided with valves.
5. The system of claim 4, wherein: the length of the water inlet pipe in the artificial wetland must not exceed the distance between the edge of the artificial wetland and the nearest blocking device, and must not be less than half of the distance;
preferably, the surface of the water inlet pipe in the artificial wetland is wrapped with gauze, and water distribution holes are uniformly distributed on the pipe wall.
6. The system of claim 3, wherein: the aeration device is a microporous aeration pipe and is arranged between one side of the artificial wetland, which is provided with the water inlet pipe, and the blocking device closest to the side, and the aeration device is connected with an air blower through an aeration guide pipe to realize atmospheric reoxygenation, so that the content of dissolved oxygen in the part of the artificial wetland is 2-3 mg/L.
7. The system of claim 6, wherein: the artificial wetland is divided into an aerobic zone and an anaerobic zone by the blocking device, the aeration device arranged at the bottom of the artificial wetland and the atmospheric reoxygenation, the range of the aeration device and the atmospheric reoxygenation is the aerobic zone of the artificial wetland, and the rest part is the anaerobic zone of the artificial wetland.
8. The system of claim 3, wherein: the magnetic material is a permanent magnet, more preferably a rare earth permanent magnet material, and still more preferably a neodymium iron boron magnet;
the magnetic material is in a cuboid shape, the ratio of the height to the distance is 1: 1-1: 3, and the internal magnetic field intensity of the artificial wetland is 50-100 mT;
preferably, the plants planted on the upper part of the artificial wetland are cold-resistant plants with longer growth cycle, including but not limited to Siberian iris, Iris floribunda, Oenanthe javanica, rush, saxifrage and Acorus calamus;
preferably, the fine sand layer consists of fine sand with a particle size of <0.5 cm;
preferably, the bearing layer is composed of crushed stone with the particle size of 6-10 cm;
preferably, the diameter of the mixture of the filled filler and the waste magnetite ore is 1-3 cm, the ratio of the waste magnetite ore to the filler is 1: 3-1: 10, and the filler includes but is not limited to one or more of limestone, volcanic rock, zeolite, shale, ceramsite, slag and gravel materials.
9. The system of claim 1, wherein: fixing the magnetic material and the guide plate by a fixing device;
preferably, the fixing device is made of nonmagnetic stainless steel materials.
10. A method for pollutant degradation at low temperatures using the system of any of claims 1-9, characterized in that: the method specifically comprises the following steps:
sewage to be treated uniformly enters the artificial wetland through the water inlet pipe in a continuous water inlet mode, the sewage is in a wave-shaped flow state after passing through a blocking device consisting of a magnetic material and a guide plate, the sewage repeatedly passes through an aerobic area and an anaerobic area in the flowing process of the artificial wetland to effectively remove pollutants such as nitrogen, organic matters and the like, and the purified effluent is discharged through a drain pipe.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613788A (en) * | 2003-11-05 | 2005-05-11 | 徐成铣 | Highly magnetizing water softener |
| CN106115926A (en) * | 2016-08-19 | 2016-11-16 | 上海禹之洋环保科技有限公司 | A kind of wavy subsurface-flow constructed wetland of multi-medium-layer |
| CN110342630A (en) * | 2019-06-06 | 2019-10-18 | 河海大学 | It is a kind of for the ecological bed of preprocessing coking wastewater |
| CN110577334A (en) * | 2019-09-29 | 2019-12-17 | 中国环境科学研究院 | Constructed wetland water environment restoration system and method |
-
2021
- 2021-03-25 CN CN202110320894.2A patent/CN113104982A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613788A (en) * | 2003-11-05 | 2005-05-11 | 徐成铣 | Highly magnetizing water softener |
| CN106115926A (en) * | 2016-08-19 | 2016-11-16 | 上海禹之洋环保科技有限公司 | A kind of wavy subsurface-flow constructed wetland of multi-medium-layer |
| CN110342630A (en) * | 2019-06-06 | 2019-10-18 | 河海大学 | It is a kind of for the ecological bed of preprocessing coking wastewater |
| CN110577334A (en) * | 2019-09-29 | 2019-12-17 | 中国环境科学研究院 | Constructed wetland water environment restoration system and method |
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