CN117509966A - Ternary micro-electrolysis reinforced aeration vertical flow constructed wetland and construction method thereof - Google Patents
Ternary micro-electrolysis reinforced aeration vertical flow constructed wetland and construction method thereof Download PDFInfo
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- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 96
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000002351 wastewater Substances 0.000 claims abstract description 22
- 244000005700 microbiome Species 0.000 claims abstract description 18
- 230000015556 catabolic process Effects 0.000 claims abstract description 13
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
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- 238000003860 storage Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- QALQXPDXOWOWLD-UHFFFAOYSA-N [N][N+]([O-])=O Chemical compound [N][N+]([O-])=O QALQXPDXOWOWLD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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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
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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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
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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
- C02F3/28—Anaerobic digestion processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F7/00—Aeration of stretches of water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a ternary micro-electrolysis reinforced aeration vertical flow constructed wetland and a construction method, wherein the construction method comprises the following steps: 1) Constructing a reservoir for holding wastewater; 2) Building an aeration structure, selecting a building area of the constructed wetland, and arranging an aeration system in the building area, 3) building the constructed wetland, and 4) performing aeration treatment. According to the invention, the Fe-Cu-AC ternary micro-electrolysis material, the aeration constructed wetland and the salt-tolerant microorganism are coupled, the Fe-Cu-AC ternary micro-electrolysis material is used as a part of a matrix, fe is used as an anode power-off electrode to generate oxidation reaction, cu and AC are used as double cathodes to accelerate the anode to obtain an electron transfer process, and oxidation groups can be accelerated to generate and reduce in the system to strengthen the degradation of pollutants.
Description
Technical Field
The invention belongs to the technical field of artificial wetland purification, and particularly relates to a ternary micro-electrolysis reinforced aeration vertical flow artificial wetland and a construction method thereof, in particular to ternary micro-electrolysis reinforced aeration vertical flow artificial wetland composite salt tolerant bacteria water for purifying saline-alkali landscaping and an artificial wetland technology.
Background
The high-salt wastewater is organic wastewater with high salt content, the sources of the wastewater are mainly seawater, industrial wastewater and salt-containing domestic sewage, along with the rapid development of industrial technology, the discharge of the high-salt wastewater is also gradually increased, and the high-salt wastewater has great harm to the environment, so the treatment of the high-salt wastewater is one of the environmental problems to be solved at present. At present, the treatment modes of the high-salt wastewater mainly comprise a physical-chemical method and a biological method, wherein the physical-chemical method mainly comprises an evaporation method, an electrochemistry, a membrane separation technology, an ion exchange technology and other treatment methods, the treatment cost is high although the methods are high, when the biological method is used for treating the high-salt wastewater, the growth of microorganisms is inhibited due to the high salt content of the wastewater, the treatment effect is influenced, and the synergistic effect of the physical, chemical and biological three of the high-salt wastewater treated by the artificial wetland meets the effective treatment of sewage.
The constructed wetland is an environment-friendly technology for treating wastewater and pollutants, and converts harmful substances in the wastewater into harmless substances by simulating an ecological system of the natural wetland. However, the efficiency and operating costs of constructed wetlands have been challenges facing this technology. The patent relates to a method for purifying saline-alkali landscape water by using ternary micro-electrolysis reinforced aeration vertical flow constructed wetland compound salt tolerant bacteria. The method combines the aeration vertical flow iron-based constructed wetland and the salt-tolerant microbial technology, and aims at efficiently purifying the water for the saline-alkali landscape.
The system comprises an aeration vertical flow iron-based constructed wetland unit and a salt-tolerant microbial remediation unit. The aeration vertical flow iron-based constructed wetland unit realizes the aeration vertical flow treatment process of the saline-alkali landscape water by using equipment such as an aeration device, a peristaltic pump and the like through the arranged plants and the fillers. The process effectively removes pollutants such as organic matters, nitrogen, phosphorus and the like in water through the actions of plant absorption, microbial degradation, physical filtration and the like, simultaneously reduces the salt concentration in the water, and the ternary micro-electrolysis matrix in the constructed wetland is a micro-electrolysis system consisting of Fe-Cu-AC ternary, wherein Fe is taken as an anode power-off electrode to perform oxidation reaction, cu and AC are taken as double cathodes to accelerate the anode to obtain an electron transfer process, and the degradation of the pollutants can be enhanced in the system in such ways as accelerating the generation of oxidation groups, reduction reaction and the like.
The salt-tolerant microbial repair unit is used for further decomposing and removing salt and organic pollutants in water through the metabolism of flora and a biodegradation mechanism by introducing the salt-tolerant microbial strain which is screened and cultured, so that the salt-tolerant microbial repair unit is designed and operated for enhancing the saline-alkali stress tolerance of a wetland system and improving the purification effect of the wetland.
Disclosure of Invention
In view of the above, the main purpose of the invention is to provide a ternary micro-electrolysis reinforced aeration vertical flow constructed wetland and a construction method thereof.
The technical scheme adopted by the invention is as follows:
the construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland comprises the following steps:
1) Constructing a reservoir for holding wastewater;
2) Constructing an aeration structure, selecting a construction area of the constructed wetland, and arranging an aeration system in the construction area so that the aeration system is arranged at each 5-15m 2 Has an aeration head;
3) Constructing the constructed wetland, wherein the constructing the constructed wetland comprises the following steps:
a) Construction of a wet substrate: sequentially forming a plurality of loose layers from bottom to top by using cobblestones, gravels, biological ceramsite and soil sand mixture as a wetland matrix;
b) Filling a ternary micro-electrolysis matrix between adjacent loose layers, and adding salt-tolerant microorganisms in the matrix filling process;
c) Covering wetland plants on a wetland substrate;
4) And (3) performing aeration treatment, namely performing interval aeration on the wetland by controlling an aeration pump, providing enough oxygen for flora metabolism in an aeration stage, promoting degradation of organic matters and oxidation-reduction reaction, and entering a denitrification treatment process in a non-aeration stage.
Further, the ternary micro-electrolysis matrix is an Fe-Cu-C matrix; and the ternary micro-electrolysis matrix is prepared by the following method:
weighing Fe powder, cu powder, biomass, activated carbon fiber or biomass carbon particles according to a proportion and fully mixing;
adding 5-10% of carboxymethyl cellulose as a binder, adding water, fully mixing, and processing into spheres of 20-30 g/each by using a granulator;
drying and shaping in a constant temperature vacuum drying oven to prevent high temperature calcination and cracking, transferring into a muffle furnace, calcining at 900-1300 ℃ for 3-6h, and gradually cooling to form the ternary micro-electrolysis matrix with honeycomb holes.
Further, the mixing proportion of the Fe powder, the Cu powder, the biomass, the activated carbon fiber or the biomass carbon particles is as follows: fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:2-3:3:2-3.
Further, a ternary micro-electrolysis matrix is filled between adjacent loose layers, wherein the height of the ternary micro-electrolysis matrix is 3-10cm.
The invention also relates to a ternary micro-electrolysis reinforced aeration vertical flow constructed wetland, which comprises the following steps:
the reservoir is used for placing wastewater;
the artificial wetland comprises a plurality of loose layers, wherein a ternary micro-electrolysis matrix layer is arranged between adjacent loose layers, and salt-tolerant microorganisms are filled in the ternary micro-electrolysis matrix layer;
aerationThe device is characterized in that an aeration head is arranged at the bottom of the artificial wetland through an aeration pipe so that the aeration head is arranged at each 5-15m 2 The device is provided with an aeration head, the constructed wetland is subjected to spaced aeration, the wetland water is introduced from a reservoir through a water inlet pipe under the action of a peristaltic pump, enters the bottom of the constructed wetland, flows out through a plurality of loose layers and a plurality of ternary micro-electrolysis matrix layers, and thus the removal of pollutants is completed.
Further, sufficient oxygen is supplied to the flora metabolism during the aeration phase to promote the degradation of organic matters and the oxidation-reduction reaction, and the organic matters enter the denitrification treatment process during the non-aeration phase.
Further, the ternary micro-electrolysis matrix layer is formed by stacking granular ternary micro-electrolysis matrixes, wherein the surface of the ternary micro-electrolysis matrixes is provided with honeycomb holes which are uniformly distributed.
Further, the ternary micro-electrolysis matrix is an Fe-Cu-C matrix formed by Fe powder, cu powder, activated carbon fiber or biomass carbon particles.
Further, the loose layers are respectively from bottom to top: the three-dimensional micro-electrolysis matrix layer is filled between the cobble layer and the gravel layer, between the gravel layer and the biological haydite layer and between the biological haydite layer and the soil sand layer respectively.
Further, the aeration head is positioned at the bottom of the artificial wetland and is positioned on the cobble layer.
The constructed wetland uses gravel, biological ceramsite, cobblestone and Fe-Cu-AC ternary micro-electrolysis material as a matrix, and the upper layer of the matrix is covered with a soil and sand mixture and is planted with wetland plants with stronger water purifying capacity, so that microorganisms are attached to the surface of the matrix; aiming at the defect of low treatment efficiency of the constructed wetland, the invention couples the Fe-Cu-AC ternary micro-electrolysis material, the aeration constructed wetland and the salt-tolerant microorganism, wherein the Fe-Cu-AC ternary micro-electrolysis material is used as a part of a matrix, fe is used as an anode for losing electrons to generate oxidation reaction, cu and AC are used as double cathodes to accelerate the anode to obtain electron transfer process, oxidation groups can be accelerated in the system to generate and reduce the reaction, and the like to strengthen the degradation of pollutants, and the addition of the salt-tolerant microorganism and the aeration system can further decompose and remove salt and organic pollutants in water through the metabolism of flora and a biodegradation mechanism.
Drawings
FIG. 1 is a diagram of an constructed wetland apparatus;
FIG. 2 is a schematic illustration of a high temperature calcination process for preparing a micro-electrolytic material;
FIG. 3 is an electron microscope scan of a ternary microelectrolysis material.
Detailed Description
The present invention will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present invention are provided for illustration of the invention and are not intended to be limiting.
Example 1
The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland comprises the following steps:
1) Constructing a reservoir for holding wastewater;
2) Constructing an aeration structure, selecting a construction area of the constructed wetland, and arranging an aeration system in the construction area so that the aeration system is arranged every 5m 2 Has an aeration head;
3) Constructing the constructed wetland, wherein the constructing the constructed wetland comprises the following steps:
a) Construction of a wet substrate: sequentially forming a plurality of loose layers from bottom to top by using cobblestones, gravels, biological ceramsite and soil sand mixture as a wetland matrix;
b) And filling a ternary micro-electrolysis matrix between adjacent loose layers, and filling the ternary micro-electrolysis matrix between adjacent loose layers, wherein the height of the ternary micro-electrolysis matrix is 3cm. And adding salt-tolerant microorganisms during the filling process of the matrix; the ternary micro-electrolysis matrix is an Fe-Cu-C matrix; and the ternary micro-electrolysis matrix is prepared by the following method: weighing Fe powder, cu powder, biomass, activated carbon fiber or biomass carbon particles according to a proportion and fully mixing; adding 5% of carboxymethyl cellulose as an adhesive, adding water, fully mixing, and processing into spheres of 20 g/g by using a sphere forming machine; drying and shaping in a constant temperature vacuum drying oven to prevent high temperature calcination and cracking, transferring into a muffle furnace, calcining for 3h at 900 ℃, and gradually cooling to form the ternary micro-electrolysis matrix with honeycomb holes. The mixing proportion of the Fe powder, the Cu powder, the biomass, the activated carbon fiber or the biomass carbon particles is as follows: fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:2:3:3.
c) Covering wetland plants on a wetland substrate;
4) And (3) performing aeration treatment, namely performing interval aeration on the wetland by controlling an aeration pump, providing enough oxygen for flora metabolism in an aeration stage, promoting degradation of organic matters and oxidation-reduction reaction, and entering a denitrification treatment process in a non-aeration stage.
Example 2
The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland comprises the following steps:
1) Constructing a reservoir for holding wastewater;
2) Constructing an aeration structure, selecting a construction area of the constructed wetland, and arranging an aeration system in the construction area so that the aeration system is arranged every 15m 2 Has an aeration head;
3) Constructing the constructed wetland, wherein the constructing the constructed wetland comprises the following steps:
a) Construction of a wet substrate: sequentially forming a plurality of loose layers from bottom to top by using cobblestones, gravels, biological ceramsite and soil sand mixture as a wetland matrix;
b) And filling a ternary micro-electrolysis matrix between adjacent loose layers, and filling the ternary micro-electrolysis matrix between adjacent loose layers, wherein the height of the ternary micro-electrolysis matrix is 10cm. And adding salt-tolerant microorganisms during the filling process of the matrix; the ternary micro-electrolysis matrix is an Fe-Cu-C matrix; and the ternary micro-electrolysis matrix is prepared by the following method: weighing Fe powder, cu powder, biomass, activated carbon fiber or biomass carbon particles according to a proportion and fully mixing; adding 10% of carboxymethyl cellulose as an adhesive, adding water, fully mixing, and processing into 30 g/ball bodies by a ball forming machine; drying and shaping in a constant temperature vacuum drying oven to prevent high temperature calcination and cracking, transferring into a muffle furnace, calcining at 1300 ℃ for 6h, and gradually cooling to form the ternary micro-electrolysis matrix with honeycomb holes. The mixing proportion of the Fe powder, the Cu powder, the biomass, the activated carbon fiber or the biomass carbon particles is as follows: fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:3:3:2.
c) Covering wetland plants on a wetland substrate;
4) And (3) performing aeration treatment, namely performing interval aeration on the wetland by controlling an aeration pump, providing enough oxygen for flora metabolism in an aeration stage, promoting degradation of organic matters and oxidation-reduction reaction, and entering a denitrification treatment process in a non-aeration stage.
Example 3
The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland comprises the following steps:
1) Constructing a reservoir for holding wastewater;
2) Constructing an aeration structure, selecting a construction area of the constructed wetland, and arranging an aeration system in the construction area so that the aeration system is arranged every 8m 2 Has an aeration head;
3) Constructing the constructed wetland, wherein the constructing the constructed wetland comprises the following steps:
a) Construction of a wet substrate: sequentially forming a plurality of loose layers from bottom to top by using cobblestones, gravels, biological ceramsite and soil sand mixture as a wetland matrix;
b) And filling a ternary micro-electrolysis matrix between adjacent loose layers, and filling the ternary micro-electrolysis matrix between adjacent loose layers, wherein the height of the ternary micro-electrolysis matrix is 5cm. And adding salt-tolerant microorganisms during the filling process of the matrix; the ternary micro-electrolysis matrix is an Fe-Cu-C matrix; and the ternary micro-electrolysis matrix is prepared by the following method: weighing Fe powder, cu powder, biomass, activated carbon fiber or biomass carbon particles according to a proportion and fully mixing; adding 7% of carboxymethyl cellulose as an adhesive, adding water, fully mixing, and processing into spheres of 25 g/g by using a sphere forming machine; drying and shaping in a constant temperature vacuum drying oven to prevent high temperature calcination and cracking, transferring into a muffle furnace, calcining for 4 hours at a high temperature of 1300 ℃, and gradually cooling to form the ternary micro-electrolysis matrix with honeycomb holes. The mixing proportion of the Fe powder, the Cu powder, the biomass, the activated carbon fiber or the biomass carbon particles is as follows: fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:2:3:3.
c) Covering wetland plants on a wetland substrate;
4) And (3) performing aeration treatment, namely performing interval aeration on the wetland by controlling an aeration pump, providing enough oxygen for flora metabolism in an aeration stage, promoting degradation of organic matters and oxidation-reduction reaction, and entering a denitrification treatment process in a non-aeration stage.
In examples 1 to 3, fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:2:3:3. when the temperature reaches over 900 ℃, the biomass is gradually decomposed and gasified, and at the moment, the ternary micro-electrolysis matrix with honeycomb holes is formed.
Example 4
The invention also relates to a ternary micro-electrolysis reinforced aeration vertical flow constructed wetland, which comprises the following steps:
the reservoir is used for placing wastewater;
the artificial wetland comprises a plurality of loose layers, wherein a ternary micro-electrolysis matrix layer is arranged between adjacent loose layers, and salt-tolerant microorganisms are filled in the ternary micro-electrolysis matrix layer;
the aeration device is characterized in that an aeration head is arranged at the bottom of the artificial wetland through an aeration pipe so that the aeration head is arranged at each 5-15m 2 The device is provided with an aeration head, the constructed wetland is subjected to spaced aeration, the wetland water is introduced from a reservoir through a water inlet pipe under the action of a peristaltic pump, enters the bottom of the constructed wetland, flows out through a plurality of loose layers and a plurality of ternary micro-electrolysis matrix layers, and thus the removal of pollutants is completed.
Further, sufficient oxygen is supplied to the flora metabolism during the aeration phase to promote the degradation of organic matters and the oxidation-reduction reaction, and the organic matters enter the denitrification treatment process during the non-aeration phase.
Further, the ternary micro-electrolysis matrix layer is formed by stacking granular ternary micro-electrolysis matrixes, wherein the surface of the ternary micro-electrolysis matrixes is provided with honeycomb holes which are uniformly distributed.
Further, the ternary micro-electrolysis matrix is an Fe-Cu-C matrix formed by Fe powder, cu powder, activated carbon fiber or biomass carbon particles.
Further, the loose layers are respectively from bottom to top: the three-dimensional micro-electrolysis matrix layer is filled between the cobble layer and the gravel layer, between the gravel layer and the biological haydite layer and between the biological haydite layer and the soil sand layer respectively.
Further, the aeration head is positioned at the bottom of the artificial wetland and is positioned on the cobble layer.
Example 5:
referring to fig. 1 to 3, wherein the apparatus 1 is a typha + micro-electrolysis + salt tolerant microbial wetland apparatus;
the device 2 is a typha plus micro-electrolysis wetland device;
the device 3 is a chive, micro-electrolysis and salt-tolerant microbial wetland device;
the device 4 is a chive and micro-electrolysis wetland device;
the water inlet is the simulated saline-alkali landscape wastewater prepared in a laboratory.
It can be seen from the table that when the salinity is 2%, the removal efficiency of the wetland to COD, ammonia nitrogen and nitrate nitrogen is still obvious, and the plant growth state is better, which indicates that compared with the traditional constructed wetland, the aeration vertical flow iron-based constructed wetland composite salt tolerant bacteria purification technology written by the patent has better removal effect to pollutants in saline-alkali landscape water, and improves the overall salinity tolerance of the wetland, and the water quality of the effluent accords with four water standards of the surface.
The technology for purifying saline-alkali landscape water by using ternary micro-electrolysis reinforced intermittent aeration vertical flow artificial wetland compound salt-tolerant microorganisms is used for researching the removal effect of black and odorous water bodies with high ammonia nitrogen and low carbon nitrogen ratio.
Wherein, the COD of the water quality of the inlet water is as follows: 240.1 to 279.9mg.L < -1 >; ammonia nitrogen: 94.84-109.99 mg.L-1; nitronitrogen: 3.132-4.317 mg.L-1, the ammonia nitrogen removal rate after the wet land treatment is 34.5-36.84%, the COD removal rate is 42.57-45.12%, and the nitrate nitrogen removal rate is 40.89-45.62%.
FIG. 3 shows a structure diagram of a ternary micro-electrolysis enhanced aeration vertical flow constructed wetland, which comprises the following components: the device comprises an aeration device 1, a wetland plant typha 2, a matrix soil sand mixture 3, biological ceramsite 4, gravel 5, cobbles 6, ternary micro-electrolysis matrix pellets 9, a peristaltic pump 10, a water inlet pipe 11 and a water storage tank 12, wherein the aeration device 1 is used for placing an aeration head 7 at the bottom of the wetland through an aeration pipe to aerate the wetland, an aerobic environment is provided for microorganisms, and wetland inflow water is introduced from the water storage tank 12 through the water inlet pipe 11 under the action of the peristaltic pump 10, enters the bottom of the wetland, flows out from the water outlet 8 through the cobbles 6, the gravel 5, the biological ceramsite 4 and the soil sand layer 3, so as to finish the removal of pollutants.
Fig. 3 is an SEM image of ternary Fe-Cu-AC, and from the SEM image, it can be seen that the metal elements on the surface of the ternary micro-electrolysis material are closely adhered, and the space structure is three-dimensional, which is more beneficial to contact with the pollutant and improves the pollutant removal efficiency.
The constructed wetland uses gravel, biological ceramsite, cobblestone and Fe-Cu-AC ternary micro-electrolysis material as a matrix, and the upper layer of the matrix is covered with a soil and sand mixture and is planted with wetland plants with stronger water purifying capacity, so that microorganisms are attached to the surface of the matrix; aiming at the defect of low treatment efficiency of the constructed wetland, the invention couples the Fe-Cu-AC ternary micro-electrolysis material, the aeration constructed wetland and the salt-tolerant microorganism, wherein the Fe-Cu-AC ternary micro-electrolysis material is used as a part of a matrix, fe is used as an anode for losing electrons to generate oxidation reaction, cu and AC are used as double cathodes to accelerate the anode to obtain electron transfer process, oxidation groups can be accelerated in the system to generate and reduce the reaction, and the like to strengthen the degradation of pollutants, and the addition of the salt-tolerant microorganism and the aeration system can further decompose and remove salt and organic pollutants in water through the metabolism of flora and a biodegradation mechanism.
The foregoing has described in detail the embodiments of the present invention, and specific embodiments have been employed to illustrate the principles and implementations of the embodiments of the present invention, the above description of the embodiments being only useful for aiding in the understanding of the principles of the embodiments of the present invention; meanwhile, as for those skilled in the art, according to the embodiments of the present invention, there are variations in the specific embodiments and the application scope, and the present description should not be construed as limiting the present invention.
Claims (10)
1. The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland is characterized by comprising the following steps of:
1) Constructing a reservoir for holding wastewater;
2) Constructing an aeration structure, selecting a construction area of the constructed wetland, and arranging an aeration system in the construction area so that the aeration system is arranged at each 5-15m 2 Has an aeration head;
3) Constructing the constructed wetland, wherein the constructing the constructed wetland comprises the following steps:
a) Construction of a wet substrate: sequentially forming a plurality of loose layers from bottom to top by using cobblestones, gravels, biological ceramsite and soil sand mixture as a wetland matrix;
b) Filling a ternary micro-electrolysis matrix between adjacent loose layers, and adding salt-tolerant microorganisms in the matrix filling process;
c) Covering wetland plants on a wetland substrate;
4) And (3) performing aeration treatment, namely performing interval aeration on the wetland by controlling an aeration pump, providing enough oxygen for flora metabolism in an aeration stage, promoting degradation of organic matters and oxidation-reduction reaction, and entering a denitrification treatment process in a non-aeration stage.
2. The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland according to claim 1, wherein the ternary micro-electrolysis matrix is Fe-Cu-C matrix; and the ternary micro-electrolysis matrix is prepared by the following method:
weighing Fe powder, cu powder, biomass, activated carbon fiber or biomass carbon particles according to a proportion and fully mixing;
adding 5-10% of carboxymethyl cellulose as a binder, adding water, fully mixing, and processing into spheres of 20-30 g/each by using a granulator;
drying and shaping in a constant temperature vacuum drying oven to prevent high temperature calcination and cracking, transferring into a muffle furnace, calcining at 900-1300 ℃ for 3-6h, and gradually cooling to form the ternary micro-electrolysis matrix with honeycomb holes.
3. The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland according to claim 2, wherein the mixing proportion of the Fe powder, the Cu powder, the biomass, the activated carbon fiber or the biomass carbon particles is as follows: fe powder: cu powder: biomass: activated carbon fiber or biomass charcoal particle = 2:2-3:3:2-3.
4. The construction method of the ternary micro-electrolysis reinforced aeration vertical flow constructed wetland according to claim 1, wherein a ternary micro-electrolysis matrix is filled between adjacent loose layers, and the height of the ternary micro-electrolysis matrix is 3-10cm.
5. The ternary micro-electrolysis enhanced aeration vertical flow constructed wetland is characterized by comprising the following components:
the reservoir is used for placing wastewater;
the artificial wetland comprises a plurality of loose layers, wherein a ternary micro-electrolysis matrix layer is arranged between adjacent loose layers, and salt-tolerant microorganisms are filled in the ternary micro-electrolysis matrix layer;
the aeration device is characterized in that an aeration head is arranged at the bottom of the artificial wetland through an aeration pipe so that the aeration head is arranged at each 5-15m 2 Has an aeration head for performing interval aeration on the constructed wetland,under the action of peristaltic pump, the water entering the wet land is introduced from the reservoir via the water inlet pipe, enters the bottom of the artificial wet land, and flows out via the plurality of loose layers and the plurality of ternary micro-electrolysis matrix layers, so as to remove pollutants.
6. The ternary micro-electrolysis enhanced aerated vertical flow constructed wetland according to claim 5, wherein sufficient oxygen is provided to supply bacteria for metabolism during the aeration phase to promote degradation of organic matters and oxidation-reduction reaction, and enters into denitrification treatment during the non-aeration phase.
7. The ternary micro-electrolysis reinforced aeration vertical flow constructed wetland according to claim 5, wherein the ternary micro-electrolysis matrix layer is formed by stacking granular ternary micro-electrolysis matrixes, and the surface of the ternary micro-electrolysis matrixes is provided with honeycomb holes which are uniformly distributed.
8. The ternary micro-electrolysis reinforced aerated vertical flow constructed wetland according to claim 7, wherein the ternary micro-electrolysis matrix is an Fe-Cu-C matrix composed of Fe powder, cu powder, activated carbon fibers or biomass carbon particles.
9. The ternary micro-electrolysis reinforced aeration vertical flow constructed wetland according to claim 5, wherein the plurality of loose layers are respectively from bottom to top: the three-dimensional micro-electrolysis matrix layer is filled between the cobble layer and the gravel layer, between the gravel layer and the biological haydite layer and between the biological haydite layer and the soil sand layer respectively.
10. The ternary micro-electrolysis enhanced aerated vertical flow constructed wetland according to claim 5, wherein the aeration head is positioned at the bottom of the constructed wetland and is positioned at the cobble layer.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204737846U (en) * | 2015-04-23 | 2015-11-04 | 广西师范大学 | Handle agriculture non -point source pollution's perpendicular constructed wetland system of upwelling |
| CN106430605A (en) * | 2016-11-24 | 2017-02-22 | 河海大学 | Artificial wetland device for deep denitrification of tail water in sewage treatment plant and application |
| CN112047576A (en) * | 2020-09-10 | 2020-12-08 | 河海大学 | Device for removing resistance genes and nitrogen and phosphorus in wastewater of livestock and poultry farm and operation process thereof |
| CN117069274A (en) * | 2023-09-27 | 2023-11-17 | 西南林业大学 | Electric field enhanced vertical flow constructed wetland device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204737846U (en) * | 2015-04-23 | 2015-11-04 | 广西师范大学 | Handle agriculture non -point source pollution's perpendicular constructed wetland system of upwelling |
| CN106430605A (en) * | 2016-11-24 | 2017-02-22 | 河海大学 | Artificial wetland device for deep denitrification of tail water in sewage treatment plant and application |
| CN112047576A (en) * | 2020-09-10 | 2020-12-08 | 河海大学 | Device for removing resistance genes and nitrogen and phosphorus in wastewater of livestock and poultry farm and operation process thereof |
| CN117069274A (en) * | 2023-09-27 | 2023-11-17 | 西南林业大学 | Electric field enhanced vertical flow constructed wetland device |
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