CN111333261A - Wastewater treatment system based on constructed wetland - Google Patents
Wastewater treatment system based on constructed wetland Download PDFInfo
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- CN111333261A CN111333261A CN202010156502.9A CN202010156502A CN111333261A CN 111333261 A CN111333261 A CN 111333261A CN 202010156502 A CN202010156502 A CN 202010156502A CN 111333261 A CN111333261 A CN 111333261A
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- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 33
- 238000012856 packing Methods 0.000 claims abstract description 92
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 30
- 239000011941 photocatalyst Substances 0.000 claims abstract description 30
- 230000005855 radiation Effects 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- 241000196324 Embryophyta Species 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000002071 nanotube Substances 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 9
- 239000005995 Aluminium silicate Substances 0.000 claims description 8
- 235000012211 aluminium silicate Nutrition 0.000 claims description 8
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 8
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical group [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 244000205574 Acorus calamus Species 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- 235000011996 Calamus deerratus Nutrition 0.000 claims description 3
- 235000005273 Canna coccinea Nutrition 0.000 claims description 3
- 240000008555 Canna flaccida Species 0.000 claims description 3
- 241000219991 Lythraceae Species 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 3
- 235000019441 ethanol Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 244000025254 Cannabis sativa Species 0.000 claims 1
- 230000015556 catabolic process Effects 0.000 abstract description 10
- 238000006731 degradation reaction Methods 0.000 abstract description 10
- 239000002351 wastewater Substances 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 description 13
- 230000001699 photocatalysis Effects 0.000 description 9
- 238000007146 photocatalysis Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 235000005205 Pinus Nutrition 0.000 description 1
- 241000218602 Pinus <genus> Species 0.000 description 1
- 244000152045 Themeda triandra Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009423 ventilation Methods 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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/009—Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
- Catalysts (AREA)
Abstract
The invention provides a wastewater treatment system based on an artificial wetland, which comprises a primary artificial wetland and a secondary artificial wetland, wherein the primary artificial wetland and the secondary artificial wetland are sequentially communicated; the first-stage constructed wetland comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, wherein the photocatalyst packing layer is positioned above the micro-electrolysis packing layer, and the first gravel packing layer surrounds the lower surfaces and the side surfaces of the photocatalyst packing layer and the micro-electrolysis packing layer; the second-stage artificial wetland comprises a vent pipe, second wetland plants, a second gravel packing layer and an ultrasonic emission device. The wastewater treatment system has high degradation efficiency on organic matters in wastewater, long running period and difficult blockage.
Description
Technical Field
The invention relates to the field of environmental engineering equipment, in particular to a wastewater treatment system based on an artificial wetland.
Background
The artificial wetland is an important technological means for domestic sewage treatment, mainly comprises plants, substrates, microorganisms and the like, and realizes the degradation of pollutants in the wastewater by utilizing the synergistic action of physics, chemistry and biology. Common artificial wetlands are mainly classified into 3 types, including free surface flow artificial wetlands, horizontal subsurface flow artificial wetlands, and vertical flow artificial wetlands. The single artificial wetland technology has low treatment efficiency and is easy to block.
In the prior technical scheme, one scheme is that an artificial wetland system filled with a photocatalytic matrix is adopted to treat sewage. The photocatalysis district and the wet area of manual work have been set up in the constructed wetland system in this scheme, and the system adopts cylindrical structure, and sewage gets into the wet area of manual work through the overflow entering behind the photocatalysis district treatment earlier after central bottom water inlet gets into, discharges behind the further degradation pollutant in the wet area of manual work, but the preliminary treatment before the constructed wetland is lower to macromolecular organic matter degradation efficiency, easily causes the jam and the outer photocatalysis filler of photocatalysis district absorbs the light energy not enough, influences photocatalysis efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a wastewater treatment system based on an artificial wetland.
In order to achieve the purpose, the invention adopts the technical scheme that: a wastewater treatment system based on an artificial wetland comprises a primary artificial wetland and a secondary artificial wetland which are sequentially communicated;
the first-stage constructed wetland comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, the photocatalyst filler layer is positioned above the micro-electrolysis filler layer, the first gravel filler layer surrounds the lower surfaces and the side surfaces of the photocatalyst filler layer and the micro-electrolysis filler layer, the first wetland plants are positioned above the photocatalyst filling layer, the ultraviolet radiation mechanism is arranged above the photocatalyst filling layer, the first-stage artificial wetland also comprises a water inlet and a water outlet, the water inlet of the first-stage artificial wetland and the water outlet of the first-stage artificial wetland are respectively positioned at the opposite sides of the first gravel packing layer, the filler of the micro-electrolysis filler layer comprises an iron-carbon filler, and the iron-carbon filler is obtained by roasting iron particles and carbon particles at 850-950 ℃;
second grade constructed wetland includes breather pipe, second wetland plant, second rubble packing layer and ultrasonic emission device, ultrasonic emission device set up in the top of second rubble packing layer, the vertical setting of breather pipe, the one end of breather pipe is located in the second rubble packing layer, the one end of breather pipe exposes in the air, the second wetland plant is located the top of second rubble packing layer, second grade constructed wetland still includes water inlet and delivery port, the water inlet of second grade constructed wetland and the delivery port of second grade constructed wetland are located respectively the xenogenesis of second rubble packing layer.
The wastewater treatment system is combined with a primary artificial wetland and a secondary artificial wetland which are sequentially communicated, organic pollutants in the wastewater are degraded in the primary artificial wetland in a photocatalysis and micro-electrolysis synergistic manner, nitrogen and phosphorus are further removed in the secondary artificial wetland under the synergistic effect of plants, microorganisms and biological growth promoting agents, the degradation efficiency of the organic pollutants in the wastewater is improved due to the arrangement of the ultrasonic emission device, and the wastewater treatment system is long in continuous operation period and is not blocked; the wastewater treatment system sequentially comprises the photocatalyst packing layer, the micro-electrolysis packing layer and the first gravel packing layer from top to bottom in the first-stage constructed wetland, organic pollutants in the sewage can be degraded better in a coordinated manner through photocatalysis and micro-electrolysis, the gravel packing has filtering and adsorption effects on the sewage, the operation period of the wastewater treatment system is prolonged to a greater extent, and blockage is reduced.
Preferably, the ultraviolet radiation mechanism is an ultraviolet lamp tube, the ultrasonic emission device comprises an ultrasonic vibrator, and the weight ratio of the iron particles to the carbon particles is (1-2): 3.
preferably, the wastewater treatment system further comprises a solar cell device, the solar cell device comprises a solar electrode plate and an electric energy storage mechanism, and the solar cell device is used for providing electric energy for the ultrasonic wave emission device and the ultraviolet light radiation mechanism.
The waste water treatment system utilizes the solar cell, can save energy and is environment-friendly.
Preferably, the interior of the primary artificial wetland is divided into 3-10 treatment units connected in parallel through vertical partition walls, each treatment unit comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, the structure of each treatment unit is the same, and the ultraviolet lamp tubes are uniformly distributed on the same horizontal plane.
The wastewater treatment system is divided into 3-10 parallel treatment units by the partition wall arranged in the primary artificial wetland, so that the treatment units can be alternately operated and maintained, and the sewage treatment capacity and the sewage degradation efficiency are improved.
Preferably, the second-stage artificial wetland is provided with more than two horizontally-arranged ultrasonic vibrators, and the second-stage artificial wetland is provided with more than two vertical vent pipes.
Preferably, the filler of the catalyst filler layer is a modified titanium dioxide nanotube, and the preparation method of the modified titanium dioxide nanotube comprises the following steps: dispersing titanium dioxide nanotubes into an ammonium metatungstate aqueous solution, mixing with absolute ethyl alcohol, reacting in a closed reaction kettle at 140-160 ℃ for 10-14 h, carrying out solid-liquid separation, washing with water and ethyl alcohol, and drying.
The wastewater treatment system adopts the modified titanium dioxide nanotube prepared by the method as the filler of the photocatalyst filler layer, so that the photocatalyst filler layer has better degradation efficiency on organic matters in the sewage.
Preferably, the second-stage artificial wetland also comprises a bio-stimulant adding device, the bio-stimulant adding device comprises a bio-stimulant spray gun, and the bio-stimulant spray gun is arranged above the second gravel packing layer.
Preferably, the second gravel packing layer comprises three layers of gravel packing, the particle size of the three layers of gravel packing is (10-16 mm), (20-40 mm) and (50-60 mm) from bottom to top in sequence, the packing of the micro-electrolysis packing layer comprises iron-carbon packing and kaolin, the weight proportion of the kaolin in the micro-electrolysis packing layer is 28% -32%, the water inlet of the first-stage artificial wetland is located above the photocatalyst packing layer, the water outlet of the first-stage artificial wetland is located below the first gravel packing layer, the water inlet of the second-stage artificial wetland is located above the second gravel packing layer, and the water outlet of the second-stage artificial wetland is located below the second gravel packing layer.
The wastewater treatment system sets the second gravel packing layer to comprise three layers of gravel packing, limits the specific particle size of the packing, improves the filtering and adsorbing effects of the second gravel packing layer on sewage, and further reduces system blockage.
Preferably, the proportion by weight of kaolin in the layer of microelectrolytic fillers is 30%.
Preferably, the second wetland plants are at least two of calamus, loosestrife, piny bluegrass and canna.
Preferably, the ultraviolet radiation intensity of the ultraviolet radiation mechanism is 0-5W/cm2The ultrasonic radiation intensity of the ultrasonic wave emitting device is 6-10W/cm2。
The invention has the beneficial effects that: the invention provides a wastewater treatment system based on an artificial wetland, which combines photocatalysis and micro-electrolysis with the artificial wetland, adopts an integrated structure, has high treatment efficiency, occupies small area and is beneficial to maintenance; the wastewater treatment system provided by the invention is provided with the ultrasonic system, and the ultrasonic system and the filler internal breather pipe are cooperated to avoid the problem that the constructed wetland is easy to block, and energy is provided by the solar cell system. The biological growth promoting agent adding system is added to the secondary artificial wetland of the wastewater treatment system, so that the pollutant degradation performance of the wetland is effectively improved.
Drawings
FIG. 1 is a schematic view showing the construction of a wastewater treatment system according to the present invention.
FIG. 2 is a schematic top view of the wastewater treatment system of the present invention.
The system comprises 1, a first-level artificial wetland, 101, a photocatalyst packing layer, 102, a micro-electrolysis packing layer, 103, a first gravel packing layer, 104, first wetland plants, 105, an ultraviolet lamp tube, 2, a second-level artificial wetland, 201, a ventilation pipe, 202, second wetland plants, 203, a second gravel packing layer, 204, a solar electrode plate, 205, a bio-stimulant spray gun, 206 and an ultrasonic vibrator.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
The wastewater treatment system based on the artificial wetland comprises a primary artificial wetland 1 and a secondary artificial wetland 2 which are sequentially communicated;
the first-stage constructed wetland comprises a photocatalyst packing layer 101, a micro-electrolysis packing layer 102, a first gravel packing layer 103, first wetland plants 104 and an ultraviolet radiation mechanism, the photocatalyst filler layer is positioned above the micro-electrolysis filler layer, the first gravel filler layer surrounds the lower surfaces and the side surfaces of the photocatalyst filler layer and the micro-electrolysis filler layer, the first wetland plants are positioned above the photocatalyst filling layer, the ultraviolet radiation mechanism is arranged above the photocatalyst filling layer, the first-stage artificial wetland also comprises a water inlet and a water outlet, the water inlet of the first-stage artificial wetland is positioned above the photocatalyst packing layer, the water outlet of the primary artificial wetland is positioned below the first gravel packing layer, the filler of the micro-electrolysis packing layer comprises iron-carbon filler, and the iron-carbon filler is obtained by mixing iron particles and carbon particles and then roasting at 900 ℃;
second grade constructed wetland includes breather pipe 201, second wetland plant 202, second rubble packing layer 203 and ultrasonic emission device, ultrasonic emission device set up in the top of second rubble packing layer, the vertical setting of breather pipe, the one end of breather pipe is located in the second rubble packing layer, the one end of breather pipe exposes in the air, the second wetland plant is located the top of second rubble packing layer, second grade constructed wetland still includes water inlet and delivery port, the water inlet of second grade constructed wetland is located the top of light second rubble packing layer, the delivery port of second grade constructed wetland is located the below of second rubble packing layer.
Further, the ultraviolet radiation mechanism is an ultraviolet lamp tube 105, the ultrasonic wave emitting device comprises an ultrasonic wave oscillator, and the weight ratio of the iron particles to the carbon particles is (1-2): 3.
for energy saving and environmental protection, the wastewater treatment system further comprises a solar cell device, wherein the solar cell device comprises a solar electrode plate 204 and an electric energy storage mechanism, and the solar cell device is used for providing electric energy for the ultrasonic emission device and the ultraviolet radiation mechanism.
In order to improve the sewage treatment capacity and the sewage degradation efficiency, the inside of the first-stage constructed wetland is divided into 3-10 treatment units connected in parallel through vertical partition walls, each treatment unit comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, the structures of the treatment units are the same, and the ultraviolet lamp tubes are uniformly distributed on the same horizontal plane.
Further, the second-stage artificial wetland is provided with more than two ultrasonic vibrators 206 which are horizontally arranged, and the second-stage artificial wetland is provided with more than two vertical vent pipes.
Further, the filler of the catalyst filler layer is a modified titanium dioxide nanotube, and the preparation method of the modified titanium dioxide nanotube comprises the following steps: dispersing titanium dioxide nanotubes into an ammonium metatungstate aqueous solution to obtain a mixed system A, mixing the mixed system A with absolute ethyl alcohol, reacting for 12 hours in a closed reaction kettle at 150 ℃, carrying out solid-liquid separation, washing with water and ethyl alcohol, and drying. The modified titanium dioxide nanotube prepared by the method is used as the filler of the photocatalyst filler layer, so that the photocatalyst filler layer has better degradation efficiency on organic matters in sewage.
Further, the second-stage constructed wetland also comprises a bio-stimulant adding device, the bio-stimulant adding device comprises a bio-stimulant spray gun 205, and the bio-stimulant spray gun is arranged above the second gravel packing layer.
Further, the second gravel packing layer comprises three layers of gravel fillers, the grain diameters of the three layers of gravel fillers are (10-16 mm), (20-40 mm) and (50-60 mm) from bottom to top in sequence, the fillers of the micro-electrolysis packing layer consist of iron-carbon fillers and kaolin, and the weight proportion of the kaolin in the micro-electrolysis packing layer is 28% -32%. The second gravel packing layer is arranged to comprise three layers of gravel packing, the specific particle size of the packing is limited, the filtering and adsorption effects of the second gravel packing layer on sewage are improved, and the system blockage is further reduced. Further, the weight proportion of kaolin in the micro-electrolysis filler layer is 30%.
Further, the second wetland plants are at least two of calamus, loosestrife, pinus alternatus and canna.
Further, the ultraviolet radiation intensity of the ultraviolet radiation mechanism is 0-5W/cm2The ultrasonic radiation intensity of the ultrasonic wave emitting device is 6-10W/cm2。
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The wastewater treatment system based on the artificial wetland is characterized by comprising a primary artificial wetland and a secondary artificial wetland which are sequentially communicated;
the first-stage constructed wetland comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, the photocatalyst filler layer is positioned above the micro-electrolysis filler layer, the first gravel filler layer surrounds the lower surfaces and the side surfaces of the photocatalyst filler layer and the micro-electrolysis filler layer, the first wetland plants are positioned above the photocatalyst filling layer, the ultraviolet radiation mechanism is arranged above the photocatalyst filling layer, the first-stage artificial wetland also comprises a water inlet and a water outlet, the water inlet of the first-stage artificial wetland and the water outlet of the first-stage artificial wetland are respectively positioned at the opposite sides of the first gravel packing layer, the filler of the micro-electrolysis filler layer comprises an iron-carbon filler, and the iron-carbon filler is obtained by roasting iron particles and carbon particles at 850-950 ℃;
second grade constructed wetland includes breather pipe, second wetland plant, second rubble packing layer and ultrasonic emission device, ultrasonic emission device set up in the top of second rubble packing layer, the vertical setting of breather pipe, the one end of breather pipe is located in the second rubble packing layer, the one end of breather pipe exposes in the air, the second wetland plant is located the top of second rubble packing layer, second grade constructed wetland still includes water inlet and delivery port, the water inlet of second grade constructed wetland and the delivery port of second grade constructed wetland are located respectively the xenogenesis of second rubble packing layer.
2. The wastewater treatment system according to claim 1, wherein the ultraviolet radiation mechanism is an ultraviolet lamp tube, the ultrasonic emission device comprises an ultrasonic vibrator, and the weight ratio of the iron particles to the carbon particles is (1-2): 3.
3. the wastewater treatment system of claim 2, further comprising a solar cell device comprising a solar electrode plate and an electrical energy storage mechanism, the solar cell device being configured to provide electrical energy to the ultrasonic emission device and the ultraviolet radiation mechanism.
4. The wastewater treatment system according to claim 2, wherein the inside of the primary constructed wetland is divided into 3-10 treatment units connected in parallel by vertical partition walls, each treatment unit comprises a photocatalyst packing layer, a micro-electrolysis packing layer, a first gravel packing layer, first wetland plants and an ultraviolet radiation mechanism, the structure of each treatment unit is the same, and the ultraviolet lamp tubes are uniformly distributed on the same horizontal plane.
5. The wastewater treatment system according to claim 2, wherein the secondary artificial wetland is provided with more than two horizontally arranged ultrasonic vibrators, and the secondary artificial wetland is provided with more than two vertical vent pipes.
6. The wastewater treatment system of claim 1, wherein the filler of the catalyst filler layer is a modified titanium dioxide nanotube, and the preparation method of the modified titanium dioxide nanotube comprises the following steps: dispersing titanium dioxide nanotubes into an ammonium metatungstate aqueous solution, mixing with absolute ethyl alcohol, reacting in a closed reaction kettle at 140-160 ℃ for 10-14 h, carrying out solid-liquid separation, washing with water and ethyl alcohol, and drying.
7. The wastewater treatment system of claim 1, wherein the secondary constructed wetland further comprises a bio-stimulant dosing device, the bio-stimulant dosing device comprises a bio-stimulant spray gun, and the bio-stimulant spray gun is arranged above the second gravel packing layer.
8. The wastewater treatment system according to claim 1, wherein the second gravel packing layer comprises three layers of gravel packing, the particle diameters of the three layers of gravel packing are (10-16 mm), (20-40 mm) and (50-60 mm) from bottom to top in sequence, the packing of the micro-electrolysis packing layer comprises iron-carbon packing and kaolin, the weight proportion of the kaolin in the micro-electrolysis packing layer is 28% -32%, the water inlet of the first-stage constructed wetland is positioned above the photocatalyst packing layer, the water outlet of the first-stage constructed wetland is positioned below the first gravel packing layer, the water inlet of the second-stage constructed wetland is positioned above the second gravel packing layer, and the water outlet of the second-stage constructed wetland is positioned below the second gravel packing layer.
9. The wastewater treatment system of claim 1, wherein the second wetland plants are at least two of calamus, loosestrife, pinnay grass, canna rosea.
10. The wastewater treatment system according to claim 1, wherein the ultraviolet radiation intensity of the ultraviolet radiation mechanism is 0-5W/cm2The ultrasonic radiation intensity of the ultrasonic wave emitting device is 6-10W/cm2。
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| CN202010156502.9A CN111333261A (en) | 2020-03-09 | 2020-03-09 | Wastewater treatment system based on constructed wetland |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104045163A (en) * | 2014-06-26 | 2014-09-17 | 南京师范大学 | Method for improving artificial wetland sewage treatment performance by using titanium-containing blast furnace slags |
| CN206069645U (en) * | 2016-10-09 | 2017-04-05 | 常州信息职业技术学院 | A kind of photoelectricity compound sewage processing equipment |
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| CN206069645U (en) * | 2016-10-09 | 2017-04-05 | 常州信息职业技术学院 | A kind of photoelectricity compound sewage processing equipment |
| CN206828302U (en) * | 2017-03-27 | 2018-01-02 | 长安大学 | A kind of photocatalyst-type artificial wet field facilities for treating sewage |
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