CN117886483A - A treatment device and method for river and lake water - Google Patents
A treatment device and method for river and lake water Download PDFInfo
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- CN117886483A CN117886483A CN202410244904.2A CN202410244904A CN117886483A CN 117886483 A CN117886483 A CN 117886483A CN 202410244904 A CN202410244904 A CN 202410244904A CN 117886483 A CN117886483 A CN 117886483A
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating 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
- 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
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- 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 or fuel cells
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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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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- 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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a treatment device and a treatment method for river and lake water bodies. The river and lake water body treatment device comprises an electric flocculation unit, an air floatation unit, a deslagging unit, an ultrasonic algae removal unit and an ecological floating island unit; the electric flocculation unit is provided with a shell, the shell is provided with a reaction cavity, the reaction cavity is provided with a water body inlet to be treated and a purified water outlet, and a first polar plate and a second polar plate are alternately arranged in the reaction cavity; the ultrasonic algae removal unit generates ultrasonic waves to crush algae cells to obtain algae residues; the air floatation unit comprises an aeration piece, and the aeration piece is arranged in the reaction cavity; at least part of the deslagging unit is arranged at the top of the reaction cavity; the ecological floating island unit is located the top of slagging-off unit, and ecological floating island is including gel matrix layer, nutrition soil layer and the vegetation layer of range upon range of setting in proper order, and gel matrix layer is close to the slagging-off unit. The treatment device can remove phosphorus pollutants in river and lake water bodies, recycle the phosphorus pollutants in the river and lake water bodies, and can efficiently remove algae in the river and lake water bodies.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a treatment device and a treatment method for river and lake water bodies.
Background
Phosphorus pollution is one of the main causes of eutrophication of water bodies in rivers and lakes and blue algae outbreaks. In the prior art, phosphorus removal of the river and lake water body is mainly realized by adding chemical agents into the river and lake water body, applying biological or ecological methods and the like. The method comprises the steps of adding a chemical agent into a river and lake water body, wherein the dephosphorization effect is quick, but the operation and maintenance cost is high, and secondary pollution is easy to cause; the biological or ecological method is low in cost and free of secondary pollution, but low in efficiency and large in occupied area.
In order to overcome the defects, the electric flocculation dephosphorization technology is developed, and at present, phosphorus-containing pollutants are mainly formed into phosphate compound flocs through the electric flocculation technology and then are precipitated to the bottom of a river and lake water body, however, the method still has the risk of releasing the phosphorus-containing pollutants, and the recovery of phosphorus resources cannot be realized.
Although the ultrasonic technology can inactivate algae cells to form algae residues, the formed algae residues still need to be manually salvaged, so that not only is the scum in the water body difficult to remove in time and the landscape of rivers and lakes influenced, but also the efficiency is low, and the algae residues are difficult to separate from the water body thoroughly.
Disclosure of Invention
The invention provides a treatment device for a river and lake water body, which can remove phosphorus pollutants in the river and lake water body, recycle the phosphorus pollutants in the river and lake water body, can efficiently remove algae in the river and lake water body, and has excellent economic benefit.
The invention provides a method for treating river and lake water bodies, which is carried out by using the river and lake water body treatment device.
The invention provides a treatment device for river and lake water bodies, which comprises an electric flocculation unit, an air floatation unit, a deslagging unit, an ultrasonic algae removal unit and an ecological floating island unit, wherein the electric flocculation unit is connected with the air floatation unit;
the electric flocculation unit is provided with a shell, the shell is provided with a reaction cavity, the reaction cavity is provided with a water body inlet to be treated and a purified water outlet, a first polar plate and a second polar plate are alternately arranged in the reaction cavity, and electrolytic ions generated by electrolysis of the first polar plate and the second polar plate form flocs with pollutants in the water body to be treated;
the ultrasonic algae removal unit generates ultrasonic waves to crush algae cells to obtain algae residues;
the air floatation unit comprises an aeration piece, the aeration piece is arranged in the reaction cavity, and bubbles generated by the aeration piece carry the flocs and the algae residues to float on the top of the reaction cavity;
at least part of the deslagging unit is arranged at the top of the reaction cavity and is used for removing flocs at the top of the reaction cavity;
the ecological floating island unit is located above the deslagging unit, the ecological floating island comprises a gel matrix layer, a nutrient soil layer and a vegetation layer which are sequentially stacked, and the gel matrix layer is close to the deslagging unit.
The processing device, wherein the reaction cavity comprises a bottom wall and side walls perpendicular to the bottom wall, and the side walls comprise a first side wall, a second side wall, a third side wall and a fourth side wall which are connected end to end; the first side wall is arranged opposite to the third side wall, and the second side wall is arranged opposite to the fourth side wall;
the water body inlet to be treated is arranged on the first side wall and/or the third side wall;
the first polar plate and the second polar plate are respectively parallel to the first side wall;
the first polar plate is close to the second side wall, and the second polar plate is close to the fourth side wall.
The processing device, wherein the air floatation unit further comprises a reflux booster pump, an air compressor, a pressure dissolved air tank and a dissolved air releaser;
the purified water outlet is communicated with the inlet of the reflux booster pump, the outlet of the reflux booster pump is communicated with the liquid phase inlet of the pressure dissolved air tank, the outlet of the air compressor is communicated with the gas phase inlet of the pressure dissolved air tank, the outlet of the pressure dissolved air tank is communicated with the inlet of the dissolved air releaser, and the outlet of the dissolved air releaser is communicated with the aeration piece; and/or the number of the groups of groups,
the slag removing unit comprises a slag scraping machine, wherein the slag scraping machine is provided with slag scraping paddles and a slag outlet;
and a slag scraping blade of the slag scraping machine scrapes and conveys the flocs at the top of the reaction cavity to a slag outlet.
The treatment device as described above, wherein the gel matrix layer is selected from a gel layer, a metal oxide layer, or a gel-metal oxide composite layer.
The treatment apparatus as described above, wherein the gel matrix layer is formed by sequentially baking and foaming the sludge.
The treatment apparatus as described above, wherein the nutrient soil layer is formed by performing aerobic fermentation treatment on the sludge.
The processing device, wherein the ultrasonic algae removal unit comprises an ultrasonic generator and an ultrasonic vibration plate which are electrically connected;
the ultrasonic vibration plate is arranged on at least part of the surface of the shell.
The treatment device further comprises a lifting unit, wherein the lifting unit is used for controlling the position of the shell in the water body to be treated.
The treatment device further comprises a control unit, wherein the control unit is electrically connected with at least one of the electric flocculation unit, the air floatation unit, the deslagging unit, the ultrasonic algae removal unit and the lifting unit.
The invention provides a method for treating river and lake water bodies, which is carried out by using the river and lake water body treatment device.
According to the treatment device for the river and lake water body, through the synergistic effect of the electric flocculation unit, the air flotation unit, the ecological floating island unit, the ultrasonic algae removal unit and the slag discharge unit, phosphorus pollutants in the river and lake water body can be removed, the phosphorus pollutants in the river and lake water body can be recycled, algae in the river and lake water body can be removed efficiently, and the treatment device has excellent economic benefits.
The invention provides a treatment method of a river and lake water body, which is carried out by using the treatment device of the river and lake water body, and the treatment method not only can remove phosphorus pollutants in the river and lake water body and recycle the phosphorus pollutants in the river and lake water body, but also can efficiently remove algae in the river and lake water body, has simple operation, can greatly reduce the blue algae burst frequency of the water body, and is suitable for wide popularization and application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments of the present invention or the related technologies are briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic structural view of a treatment apparatus for river/lake water bodies according to some embodiments of the present invention;
FIG. 2 is a schematic diagram of inlet distribution of a body of water to be treated in some embodiments of the invention;
FIG. 3 is a top view of the section A-A of FIG. 1 in accordance with the present invention;
fig. 4 is a schematic flow chart of the operation of the control unit in some embodiments of the present invention.
Reference numerals illustrate:
4: a lifting unit;
11: a housing;
12: a purified water outlet;
13: an inlet for water to be treated;
14: a first plate;
15: a second polar plate;
16: a direct current power supply;
17: a photovoltaic power generation unit;
21: an aeration member;
22: a reflux booster pump;
23: an air compressor;
24: a pressure dissolved air tank;
25: a dissolved air releaser;
31: a slag scraping machine;
32: slag scraping blades;
33: a slag outlet;
34: a slag collecting groove;
61: a detecting member;
62: a control member;
71: a gel matrix layer;
72: a nutrient soil layer;
73: a vegetation layer;
81: an ultrasonic generator;
82: an ultrasonic vibration plate;
111: a first sidewall;
112: a second sidewall;
113: a third sidewall;
114: and a fourth sidewall.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
FIG. 1 is a schematic structural view of a treatment apparatus for river/lake water bodies in a first embodiment of the present invention; FIG. 2 is a schematic diagram of inlet distribution of a body of water to be treated in some embodiments of the invention. As shown in fig. 1 and 2, a first aspect of the present invention provides a treatment device for river and lake water body, which comprises an electric flocculation unit, an air floatation unit, a deslagging unit, an ultrasonic algae removal unit and an ecological floating island unit;
the electric flocculation unit is provided with a shell 11, the shell 11 is provided with a reaction cavity, the reaction cavity is provided with a water body inlet 13 to be treated and a purified water outlet 12, a first polar plate 14 and a second polar plate 15 are alternately arranged in the reaction cavity of the shell 11, and electrolytic ions generated by electrolysis of the first polar plate 14 and the second polar plate 15 and pollutants in the water body to be treated form flocs;
the ultrasonic algae removal unit generates ultrasonic waves to crush algae to obtain algae residues;
the air floatation unit comprises an aeration piece 21, the aeration piece 21 is arranged in the reaction cavity, and bubbles generated by the aeration piece 21 carry flocs and algae residues to float on the top of the reaction cavity;
at least part of the deslagging unit is arranged at the top of the reaction cavity and is used for removing flocs at the top of the reaction cavity;
the ecological floating island unit is located the top of slagging-off unit, and the ecological floating island is including gel matrix layer 71, nutrition soil layer 72 and the vegetation layer 73 of range upon range of setting in proper order, and gel matrix layer 71 is close to the slagging-off unit.
The water to be treated is not particularly limited in the present invention, and in some embodiments, the water to be treated may be a river or lake water body containing phosphorus contaminants, nitrogen contaminants, and algae, which are commonly used in the art. Illustratively, the concentration of TP (total phosphorus content) in the water body to be treated is 0.2-5.0 mg/L, NH 3 The concentration of the N (nitrogen element) is 2.1-15.0 mg/L, and the density of the algae cells is 0.5-1.0g/L。
The material of the housing 11 is not particularly limited in the present invention, and in some embodiments, the housing 11 may be made of a corrosion-resistant material, and the housing 11 may be made of carbon steel, for example.
The treatment device of the river and lake water body can be arranged in the river and lake water body or on the bank. The present invention is not limited to the shape and number of the water inlets 13 to be treated. The number of the water inlets 13 to be treated can be one or a plurality, when the number of the water inlets 13 to be treated is one, the water treatment device for the river and lake water can be arranged on the shore, and the water to be treated enters the shell 11 through the water inlets 13 to be treated; as shown in fig. 2, the water inlets 13 to be treated can be uniformly distributed on the side wall or the bottom wall of the reaction chamber (the side wall and/or the bottom wall of the housing 11 are made by adopting a hollow process), and the treatment device for the water in the river and the lake can be arranged in the water in the river and the lake, so that the water to be treated enters the housing 11 through the plurality of water inlets 13 to be treated respectively.
The shape and the number of the purified water outlets 12 are not limited in the present invention, and the purified water outlets 12 may be one or a plurality of. In some embodiments, when the treatment device for the river and lake water body is placed in the river and lake water body, the water body to be treated enters the shell 11 through the water body inlet 13 to be treated, and purified water formed after being purified in the shell 11 can be output and recycled through the purified water outlet 12 or can be released into the water body to be treated through the top of the shell 11, so that the purification of the river and lake water body is realized.
The ultrasonic algae removal unit can generate ultrasonic waves, the ultrasonic waves can crush algae, algae cells are crushed to form algae residues, algae enrichment in a water body to be treated is avoided, ions around the first polar plate 14 and the second polar plate 15 can be dissolved in a river and lake water body by the ultrasonic algae removal unit, passivation of the first polar plate 14 and the second polar plate 15 is further prevented, and the service life of the polar plates is prolonged. The present invention is not limited to the installation position of the ultrasonic algae removal unit as long as the crushing of the algae cells in the housing 11 can be achieved, and the ultrasonic algae removal unit may be installed outside the housing 11 or at the bottom inside the housing 11, for example.
The reaction chamber is alternately provided with the first polar plate 14 and the second polar plate 15 (anode plate and cathode plate), wherein in the reaction chamber, the first polar plate 14 and the second polar plate 15 generate electrolytic ions (cations) through electrolysis, and the electrolytic ions form flocs with pollutants (such as phosphorus pollutants and nitrogen pollutants) in a water body to be treated; the ultrasonic algae removal unit generates ultrasonic waves to break algae cells in the water body to be treated to obtain algae residues; the aeration piece 21 is arranged in the reaction cavity, the aeration piece 21 can generate bubbles, the generated bubbles collide with the flocs and algae residues and adhere to form air-entrained flocs, the air-entrained flocs float to the top of the reaction cavity under the action of buoyancy, and a stable floating slag layer is formed at the top of the reaction cavity; the slag removing unit arranged at the top of the reaction cavity scrapes and conveys the air-entrained flocs in the floating slag layer to the slag collecting groove 34, then conveys the air-entrained flocs to the slag hole 33, and recovers the air-entrained flocs through the slag hole 33, and the air-entrained flocs can be used as phosphate fertilizer after dehydration.
The aeration member 21 is not particularly limited in the present invention, and in some embodiments, the aeration member 21 may be an aeration head.
The present invention is not limited to the specific arrangement positions and arrangement number of the aeration members 21, and in some embodiments, the aeration members 21 may be arranged at the bottom of the reaction chamber, and one aeration member 21 may be respectively arranged between each pair of the first electrode plate 14 and the second electrode plate 15.
It is understood that the ecological floating island unit is positioned on the liquid level of the water body to be treated and above the liquid level, and the ecological floating island unit is positioned above the slag removing unit.
The ecological floating island unit of the invention sequentially comprises a vegetation layer 73, a nutrient soil layer 72 and a gel matrix layer 71 from top to bottom, wherein the gel matrix layer 71 can adsorb pollutants (phosphorus pollutants) in a water body to be treated and/or the gel matrix layer 71 and H in the water body + After the reaction, the water can form flocs with pollutants in the water body to be treated, so that the pollutants in the water body to be treated are removed;
plants in the vegetation layer 73 are planted in the nutrient soil layer 72, the nutrient soil layer 72 provides planting carriers and nutrition for the plants in the vegetation layer 73, and the root systems of the plants in the vegetation layer 73 can absorb pollutants, so that the purifying effect is further improved.
Further, the root system of the plants in the vegetation layer 73 extends below the bottom of the gel matrix layer 71.
It will be appreciated that the root system of the plants in the vegetation layer 73 passes through the nutrient soil layer 72, the gel matrix layer 71 in sequence, and extends to a position below the bottom of the gel matrix layer 71 (at the top of the electroflocculation unit).
When the root system of the plant extends below the bottom of the gel matrix layer 71, the root system of the plant can absorb pollutants in the gel matrix layer 71, so that the in-situ regeneration of the gel matrix layer 71 is realized, the service life of the gel matrix layer 71 is prolonged, and the defects that the traditional pollutant adsorbent is easy to adsorb and saturate and difficult to regenerate can be overcome; and the root system of the plant can further absorb pollutants in the water body to be treated and further purify the water body to be treated.
The plants in the vegetation layer 73 of the present invention may be plants commonly used in the art, for example, aquatic plants, and the aquatic plants may be at least one of iris coreana, calamus, and celery, and the present invention is not limited to the planting density of the plants in the vegetation layer 73.
In the river and lake water treatment device, the electrolytic ions ionized by the electric flocculation unit through the first polar plate 14 and the second polar plate 15 react with nitrogen pollutants and phosphorus pollutants in the water to be treated to form flocs, so that the secondary pollution risk caused by adding chemical agents can be avoided, the phosphorus removal efficiency is high, the phosphorus pollutant removal rate can reach more than 50%, and the eutrophication of the water can be effectively prevented; the ecological floating island unit can further improve the purifying effect of the water body to be treated, for example, the dephosphorizing efficiency can reach more than 70%, high polymer materials are not introduced, secondary pollution of the water body to be treated can be avoided, compared with the existing single river and lake water body treatment device, the dephosphorizing efficiency can be improved by more than 30%, the dephosphorizing effect is stable, the total phosphorus content in the water body to be treated can be stably lower than 0.1mg/L (river surface water II standard and lake surface water IV standard), and eutrophication of the water body to be treated is effectively prevented; the air floatation unit can enable the flocs to form air-sandwiched flocs to float on the top of the reaction cavity, so that the air-sandwiched flocs are recycled by the deslagging unit, the risk of releasing phosphorus-containing pollutants, nitrogen-containing pollutants and algae cells caused by the precipitation of the flocs and algae residues on the bottom of a water body to be treated can be avoided, and phosphorus resources and nitrogen resources can be recycled, for example, phosphate fertilizer is formed, so that the recycling of the resources is realized; the ultrasonic algae removal unit can remove algae in the water body to be treated and reduce the frequency of blue algae outbreaks in the water body to be treated. The river and lake water treatment device can thoroughly remove pollutants and algae substances (blue algae cells) from the water to be treated, can realize the recycling of phosphorus resources and nitrogen resources, and has excellent economic benefits.
FIG. 3 is a top view of the section A-A of FIG. 1 in accordance with the present invention. As shown in fig. 3, in some embodiments of the present invention, the reaction chamber includes a bottom wall and side walls perpendicular to the bottom wall, the side walls including a first side wall 111, a second side wall 112, a third side wall 113, and a fourth side wall 114, which are connected end to end; the first side wall 111 is disposed opposite to the third side wall 113, and the second side wall 112 is disposed opposite to the fourth side wall 114;
the water inlet 13 to be treated is arranged on the first side wall 111 and/or the third side wall 113;
the first polar plate 14 and the second polar plate 15 are respectively parallel to the first side wall 111;
the first plate 14 is adjacent to the second sidewall 112 and the second plate 15 is adjacent to the fourth sidewall 114.
It will be appreciated that the side walls of the reaction chamber are formed by the first side wall 111, the second side wall 112, the third side wall 113 and the fourth side wall 114 in end-to-end relationship. The water inlet 13 to be treated may be disposed only on the first side wall 111, may be disposed only on the third side wall 113, and may be disposed on both the first side wall 111 and the third side wall 113.
The first polar plate 14 is parallel to the first side wall 111 and is close to the second side wall 112, the second polar plate 15 is parallel to the first side wall 111 and is close to the fourth side wall 114, a back-and-forth turn-back flow channel can be formed, water to be treated is helped to flow in a front-back folding manner in the shell 11, the scouring effect on the first polar plate 14 and the second polar plate 15 is enhanced, and passivation of the first polar plate 14 and the second polar plate 15 is delayed; short flow of the water body to be treated can be avoided; the contact opportunity of the water body to be treated and the electrolytic ions is improved, the reaction rate is improved, and the reaction rate can be improved by more than 30% by way of example. And the formed flocs can be fully contacted with bubbles generated by the air floatation unit, so that the flocs are prevented from settling by the traditional up-down baffling process, and the recovery efficiency of phosphorus resources is improved.
In some embodiments of the present invention, the power source of the electroflocculation unit is a direct current power source 16, and the output voltage is a pulse voltage, wherein the output current is 0-30A, and the output voltage is 0-36V.
When the output voltage is pulse voltage, the first polar plate 14 and the second polar plate 1 can be periodically changed, namely, the first polar plate 14 is periodically changed into the second polar plate 15, the second polar plate 15 is changed into the first polar plate 14, the passivation speed of the conductive polar plate can be greatly slowed down, the service life of the conductive polar plate can be prolonged by more than 30% compared with the conventional power supply mode, the electrode change period is 12-180s in some embodiments, namely, the electrode change is once every 12-180s, and in particular embodiments, the electrode change period is 60s.
In some embodiments, the dc power supply 16 may supply power through a photovoltaic power generation unit 17.
The present invention is not particularly limited to the first electrode plate 14 and the second electrode plate 15, and electrode plates commonly used in the art may be used. For example, the electrode plate may be made of aluminum or carbon material, or ruthenium or lanthanum material. In some embodiments of the present invention, the first electrode plate 14 and the second electrode plate 15 are both magnesium aluminum electrode plates. Namely, the first polar plate 14 and the second polar plate 15 are both made of magnesium aluminum alloy.
When the first plate 14 and the second plate 15 are both Mg-Al plates, the first plate 14 and the second plate 15 generate Mg by electrolysis 2+ (as shown in formula 1), mg 2+ Will be in contact with NH in the water to be treated 4 + And PO (PO) 4 3- React to form struvite MgNH 4 PO 4 ·6H 2 O (shown in formula 2), or, mg 2+ Will be in contact with PO in the water body to be treated 4 3- React to form Mg 3 (PO 4 ) 2 (as shown in formula 3), mgNH 4 PO 4 ·6H 2 O and Mg 3 (PO 4 ) 2 Is difficult to dissolve in water, thereby realizing the removal of phosphorus pollutants and nitrogen pollutants in the water body to be treated.
Mg - 2e - ＝ Mg 2+ 1 (1)
Mg 2+ + NH 4 + + PO 4 3- + 6H 2 O ＝ MgNH 4 PO 4 ·6H 2 O ∈2
3Mg 2+ + 2PO 4 3- ＝ Mg 3 (PO 4 ) 2 ∈3
The magnesium-aluminum electrode plate can slow down passivation speed, has excellent service life, and can prolong the service life by more than 20 percent compared with the electrode plate prepared by aluminum and carbon materials; and the magnesium aluminum electrode plate also has lower manufacturing cost, and compared with the electrode plate made of ruthenium and lanthanum materials, the manufacturing cost can be reduced by more than 50 percent.
Compared with the first polar plate 14 or the second polar plate 15, the first polar plate 14 and the second polar plate 15 are both magnesium-aluminum polar plates, so that the polar plates can be periodically commutated, magnesium-aluminum ions can be ensured to be electrolyzed out of the anode after the polar plates are commutated, and the removal efficiency of phosphorus-containing pollutants is improved; and the design of periodic reversing can greatly delay the passivation of the electrode.
The present invention is not limited to the distance between the first electrode plate 14 and the second electrode plate 15, and can be adjusted according to actual needs. In some embodiments of the present invention, the minimum distance between adjacent first and second plates 14, 15 is 10-15mm.
The minimum distance between adjacent first and second plates 14 and 15 refers to the vertical distance between adjacent first and second plates 14 and 15. When the minimum distance between the adjacent first electrode plate 14 and second electrode plate 15 is in the above range, the electrolytic ions can be brought into sufficient contact with the phosphorus contaminant and nitrogen contaminant in the water body, and the reaction rate of the contaminants with the electrolytic ions can be improved.
In some embodiments of the invention, the air flotation unit further comprises a reflux booster pump 22, an air compressor 23, a pressurized dissolved air tank 24, a dissolved air releaser 25;
the purified water outlet 12 is communicated with an inlet of a reflux booster pump 22, an outlet of the reflux booster pump 22 is communicated with a liquid phase inlet of a pressure dissolved air tank 24, an outlet of an air compressor 23 is communicated with a gas phase inlet of the pressure dissolved air tank 24, an outlet of the pressure dissolved air tank 24 is communicated with an inlet of a dissolved air releaser 25, and an outlet of the dissolved air releaser 25 is communicated with an aeration member 21.
Specifically, the purified water after removing the pollutants by the electroflocculation unit can be partially output through the purified water outlet 12, enter the reflux booster pump 22 through the inlet of the reflux booster pump 22, obtain the purified water with specific pressure after being pressurized by the reflux booster pump 22, the purified water with specific pressure enters the pressure dissolved air tank 24 through the outlet of the reflux booster pump 22, the compressed air enters the pressure dissolved air tank 24 through the liquid phase inlet of the pressure dissolved air tank 24, the compressed air enters the pressure dissolved air tank 24 through the outlet of the air compressor 23, the purified water with specific pressure fully contacts with the compressed air in the pressure dissolved air tank 24, the compressed air is promoted to be dissolved, thereby forming dissolved air water, the dissolved air water enters the dissolved air releaser 25 through the outlet of the pressure dissolved air tank 24, the dissolved air water in the pressure dissolved air tank 24 enters the aeration piece 21 through the outlet of the dissolved air releaser 25 after being depressurized in the dissolved air releaser 25, and the dissolved air water after being depressurized is released in the form of bubbles by the aeration piece 21.
In some embodiments, the pressure provided by the return booster pump 22 may be 3-6kg/cm 3 。
In some embodiments of the invention, when the diameter of the bubbles is 30-55 μm, the bubbles may be mixed with MgNH 4 PO 4 ·6H 2 O and Mg 3 (PO 4 ) 2 The floccules and the algae residues are fully collided and adhered to form air-sandwiched floccules, so that the floccules and the algae residues are prevented from settling; and the electrode plate can be fully disturbed, so that the concentration of electrolytic ions is prevented from being extremely bad and the electrode plate is prevented from being passivated.
In some embodiments of the invention, the deslagging unit comprises a slag scraper 31 and a slag outlet 33, the slag scraper 31 having slag scraping blades 32;
the slag scraping blade 32 of the slag scraper 31 scrapes and conveys the flocs at the top of the reaction chamber to the slag outlet 33.
Specifically, the slag scraping blade 32 scrapes and sends the air-entrained flocs in the floating slag layer to the slag collecting tank 34, and the air-entrained flocs in the slag collecting tank 34 are output through the slag outlet 33, so that the efficiency of removing and controlling phosphorus is improved without manually fishing algae.
The gel matrix layer 71 of the present invention may be a gel matrix layer 71 commonly used in the art. In some embodiments of the invention, the gel matrix layer 71 is selected from a gel layer, a metal oxide layer, or a gel-metal oxide composite layer.
Wherein the gel in the gel layer can be CaSiO 3 、MgSiO 3 FeSiO 3 At least one of them. The gel has a larger specific surface and can adsorb pollutants in the water body to be treated; the metal oxide in the metal oxide layer may be CaO, mgO, al 2 O 3 Fe (b) 2 O 3 At least one of metal oxide and H in water body to be treated + After the reaction, the catalyst can form flocs with pollutants (shown as the formula 4-formula 11); the gel-metal oxide composite layer refers to a composite layer comprising at least one gel and at least one metal oxide, the specific content of each component in the gel-metal oxide composite layer is not limited in the invention, as long as the effect of removing pollutants can be achieved, the gel in the gel-metal oxide composite layer can adsorb the pollutants in the water body to be treated, and the metal oxide can be combined with H in the water body to be treated + And then forms a floccule with the pollutant, so that the removal rate of the phosphorus pollutant in the water body to be treated is improved by more than 20%, and the formed floccule can be further adsorbed in gel.
CaO + 2H + ＝ Ca 2+ + H 2 O type 4
3Ca 2+ + 2PO 4 3- ＝ Ca 3 (PO 4 ) 2 ∈5
MgO + 2H + ＝ Mg 2+ + H 2 O-type 6
3Mg 2+ + 2PO 4 3- ＝ Mg 3 (PO 4 ) 2 ≡7
Al 2 O 3 + 6H + ＝ 2Al 3+ + 3H 2 O type 8
Al 3+ + PO 4 3- ＝ AlPO 4 ∈9
Fe 2 O 3 + 6H + ＝ 2Fe 3+ + 3H 2 O type 10
Fe 3+ + PO 4 3- ＝ FePO 4 ∈11
In some embodiments, the sludge may be sequentially subjected to a baking treatment, a foaming treatment, and a gel matrix layer 71.
Specifically, in the baking treatment, siO in the sludge 2 Can be combined with metal oxides (e.g., caO, mgO, al 2 O 3 、Fe 2 O 3 ) And reacted to form a gel (as shown in formulas 12-15).
CaO + SiO 2 ＝ CaSiO 3 12. Fig.
MgO + SiO 2 ＝ MgSiO 3 13 of the group
Al 2 O 3 + SiO 2 ＝ AlSiO 3 14, of the order of magnitude
Fe 2 O 3 + SiO 2 ＝ FeSiO 3 15 of the formula
In some embodiments, the baking process may be performed at a temperature of 500-600 ℃ for 3-4 hours to allow the sludge to gel more efficiently, thereby forming the gel matrix layer 71.
It can be appreciated that water, a foaming agent and a foam stabilizer are also required to be added in the foaming treatment, wherein the mass ratio of the gel to the water to the foaming agent to the foam stabilizer is 100:5:4:1, and the foaming agent can be H 2 O 2 The foam stabilizer may be calcium stearate. In the foaming treatment, H 2 O 2 Foaming gel is formed during the decomposition process.
In some embodiments, the process of preparing the gel matrix layer 71 further includes pre-treating the sludge, which includes drying and sieving in sequence. Wherein, the moisture in the sludge can be completely removed by drying the sludge, and the sieving treatment can sieve sludge powder with proper particle size to promote the follow-up roasting treatment, thereby obtaining the gel matrix layer 71 with high quality more efficiently. Further, the temperature of the drying treatment is 90-105 ℃, and the sludge is dried to constant weight; the grain size of the sludge powder obtained after sieving treatment is 0.5-1mm.
In the process of preparing the gel matrix layer 71, a post-treatment including a setting treatment is further included. The method comprises the following steps: the foaming gel is put into a square mold, and the foaming gel is stopped to foam until the foaming is finished and the gel is solidified, and then the mold is removed, so that a gel matrix layer 71 with a regular shape is formed.
The present invention may also select sludge to further enhance the quality of the gel matrix layer 71. In some embodiments, the sludge comprises river sediment and sewage treatment plant sludge, and the mass ratio of river sediment to sewage treatment plant sludge is (3-4): 1. further, the river bottom mud can be river dredging mud, and the sewage treatment plant sludge can be iron-containing mud which is obtained by adding ferric salt into a secondary sedimentation tank in the sewage treatment plant for sedimentation and dehydration.
The nutrient soil layer 72 of the present invention may be a nutrient soil layer 72 commonly used in the art. In some embodiments, the nutrient soil layer 72 is formed by aerobic fermentation treatment of the sludge.
The invention can make the sludge harmless and stable by carrying out aerobic fermentation treatment on the sludge, thereby obtaining the nutrient soil layer 72 suitable for plant growth. In some embodiments, the sludge may be river sediment.
Further, in the process of preparing the nutrient soil layer 72, the sludge may be pretreated, including drying. The sludge is dehydrated through the drying treatment, and the aerobic fermentation treatment is promoted.
When the gel matrix layer 71 and the nutrient soil layer 72 are prepared from sludge, the raw materials are easy to obtain, the preparation flow is simple, and the preparation cost is lower. But also can change waste into valuable and improve economic benefit.
Further, when the thickness of the gel matrix layer 71 is the same as that of the nutrient soil layer 72, further purification of the water body to be treated can be achieved on the basis of saving the gel matrix layer 71 and the nutrient soil layer 72. In some embodiments, the total thickness of the nutrient soil layer 72 and the gel matrix layer 71 is no more than 50cm.
In some embodiments of the present invention, the ultrasonic algae removal unit includes an ultrasonic generator 81 and an ultrasonic vibration plate 82 electrically connected;
the ultrasonic vibration plate 82 is provided on at least a part of the surface of the housing 11.
Specifically, the ultrasonic generator 81 generates ultrasonic waves, and the ultrasonic waves act on the water body to be treated in the shell 11 through the ultrasonic vibration plate 82, so that the algae cell structure in the water body to be treated is destroyed to achieve the algae removal effect, and ions around the first polar plate 14 and the second polar plate 15 can be dissolved in the water body to be treated, so that passivation of the first polar plate 14 and the second polar plate 15 is further prevented, and the service lives of the first polar plate 14 and the second polar plate 15 are prolonged. In some embodiments, the output power of the sonotrode 81 is 25-30kHZ.
In some embodiments of the invention, a lifting unit 4 is also included, the lifting unit 4 being used to control the position of the housing 11 in the body of water to be treated.
In the invention, when the river and lake water body treatment device is positioned in the water body to be treated, the position of the shell 11 in the water body to be treated can be controlled through the lifting unit 4, so that the position of the river and lake water body treatment device in the water body to be treated is controlled, and the removal of pollutants with different depths in the water body to be treated is realized.
The specific structure of the lifting unit 4 is not particularly limited in the present invention, and in some embodiments, the lifting unit 4 may be an electric lifting arm, and the electric lifting arm is connected to the housing 11.
In some embodiments of the invention, the control unit 6 is further comprised, the control unit 6 being electrically connected with at least one of the electric flocculation unit, the air flotation unit, the deslagging unit, the ultrasonic algae removal unit and the lifting unit 4.
Specifically, the control unit 6 may be electrically connected only to the electric flocculation unit, may be electrically connected only to the air floatation unit, may be electrically connected only to the deslagging unit, may be electrically connected only to the lifting unit 4, and may be electrically connected to the ultrasonic algae removal unit; and can be electrically connected with the electric flocculation unit, the air floatation unit, the deslagging unit, the ultrasonic algae removal unit and the lifting unit 4.
In a specific embodiment, the detecting element 61 is used for detecting the real-time content of pollutants in the water body to be treated, and the control element 62 correspondingly controls the opening degrees of the electric flocculation unit, the air floatation unit, the deslagging unit and the lifting unit 4 according to the detection result of the detecting element 61.
Fig. 4 is a schematic flow chart of the operation of the control unit in some embodiments of the present invention. As shown in fig. 4, in some embodiments of the present invention, the detecting element 61 of the control unit monitors the electrode on line, obtains real-time data via the signal receiver, and then controls the water inlet depth of the electric lifting arm via the control element 62, controls the turning cycle, the output current and the output voltage of the dc power supply 16, and controls the output power of the dissolved air releaser 25.
In the invention, the control unit 6 can ensure that the concentration of the electrolytic ions is matched with the concentration of pollutants in the water body to be treated, and can avoid excessive consumption of the electrode plate caused by excessive electrolysis of the electrode plate under the condition that the electrolytic ions and the pollutants are effectively flocculated; meanwhile, the turning period of the electrode plate can be regulated by combining the concentration of pollutants, so that the passivation time of the electrode plate is effectively delayed; and according to the concentration of pollutants in the water body to be treated, the output power of the dissolved air releaser 25 is regulated by combining the machine learning result, so that the floccules and algae residues can be fully adhered with bubbles to form air-sandwiched floccules, the effect of air floatation of the floccules is achieved, and the floccules are prevented from being disintegrated and electric energy waste caused by excessive release of the bubbles.
A second aspect of the present invention provides a method of treating a body of water in a river or lake, using the treatment apparatus of the first aspect of the body of water in a river or lake.
The river and lake water body treatment method provided by the invention is carried out by using the river and lake water body treatment device in the first aspect, so that pollutants in the river and lake water body can be removed efficiently, the pollutants can be recycled again, and the river and lake water body treatment method has excellent economic benefits and is suitable for wide popularization and application.
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
The river and lake water body treatment method of the embodiment is carried out by adopting the river and lake water body treatment device shown in fig. 1-3, and specifically comprises the following steps:
s1: respectively drying river sediment and sewage treatment plant sludge to constant weight at 105 ℃ to completely remove water to obtain river sediment sludge powder and sewage treatment plant sludge powder; firstly, screening sludge powder with the particle size of more than 1mm by using an 18-mesh screen, and then screening sludge powder with the particle size of more than 0.5mm by using a 35-mesh screen to respectively obtain sludge powder of river sediment to be baked and sludge powder of a sewage treatment plant to be baked;
reacting river sediment sludge powder and sludge powder of a sewage treatment plant for 4 hours at 600 ℃ according to the proportion of 3:1 to obtain plant-growing gel;
respectively by H 2 O 2 As a foaming agent, calcium stearate is used as a foam stabilizer, and the following components are used as plant gel: water: foaming agent: adding water into the plant gel, stirring for 60s to stir the gel into slurry, adding the foaming agent and the foam stabilizer, and uniformly and slowly stirring for 60s to ensure that H 2 O 2 Forming foaming plant-growing gel with a specific pore structure in the decomposition process;
filling the foaming plant gel into a square mold, stopping foaming until the foaming is finished and the gel is solidified, and removing the mold to obtain a gel matrix layer 71;
s2: drying, dehydrating and aerobically fermenting the river dredging sediment to obtain a nutrient soil layer 72;
wherein, in the drying treatment, the temperature is 105 ℃;
in the aerobic fermentation treatment, aerobic thermophilic bacteria are used for carrying out aerobic fermentation for 10 days under the condition of sufficient oxygen;
s3: the nutrient soil layer 72 is arranged on the surface of the gel matrix layer 71, aquatic plants (iris, calamus and cress) are planted on the surface of the nutrient soil layer 72 far away from the gel matrix layer 71 to form a vegetation layer 73, and after the aquatic plants grow until the root system extends below the bottom of the gel matrix layer 71, an ecological floating island is formed;
wherein, the thickness ratio of the nutrient soil layer 72 to the gel matrix layer 71 is 1:1, and the total thickness of the nutrient soil layer 72 and the gel matrix layer 71 is 50cm;
the planting density of the aquatic plants is 16 plants/square meter;
s4: the water to be treated enters the shell 11 along the direction vertical to the first side wall 111 through the water inlet 13, and the Mg generated by the electrolysis of the first polar plate 14 and the second polar plate 15 2+ React with nitrogen pollutants and phosphorus pollutants in the water body to be treated to form MgNH which is difficult to dissolve in water 4 PO 4 ·6H 2 O (struvite) and/or Mg 3 (PO 4 ) 2 A floccule;
wherein the concentration of TP in the water body to be treated is 3.7mg/L, NH 3 The concentration of N is 8.5mg/L, and the density of algae cells is 0.75g/L;
the first polar plate 14 and the second polar plate 15 are magnesium aluminum polar plates, and the distance between the first polar plate 14 and the second polar plate 15 is 15mm. The number of the first polar plates 14 and the second polar plates 15 is 30 respectively;
the power supply of the electric flocculation unit is a direct current power supply 16, and the output voltage is pulse voltage, wherein the output current is 24A, and the output voltage is 30V;
s2: the ultrasonic generator 81 drives the ultrasonic vibration plate 82 to generate ultrasonic waves, and the blue algae cell structure in the water body to be treated is destroyed, so that blue algae forms algae residues;
wherein the power of the ultrasonic generator 81 is 25Hz;
s3: purified water is output through a purified water outlet 12, enters a reflux booster pump 22 through an inlet of the reflux booster pump 22, is output to a pressure dissolved air tank 24 through an outlet of the reflux booster pump 22, compressed air is conveyed to a mass pressure dissolved air tank 24 through an air compressor 23, gas phase and liquid phase form dissolved air water in the pressure dissolved air tank 24, the dissolved air water is output through the pressure dissolved air tank 24, enters a dissolved air releaser 25, is output to an aeration head through the dissolved air releaser 25, and generates bubbles;
bubble and floc MgNH 4 PO 4 ·6H 2 O (struvite), floc Mg 3 (PO 4 ) 2 And at least one of the algae residues collides and adheres to form air-entrained flocs, and the air-entrained flocs float up to the top of the shell 11 under the action of buoyancy to form a stable floating slag layer;
wherein the purified water has a composition of TP of 0.06mg/L and NH 3 The concentration of the-N is 0.84mg/L, which can respectively reach the II-class and III-class standards of the quality standard of the surface water environment (GB 3838-2002), the density of the algae cells is 0.13g/L, and the blue algae eruption can be effectively avoided;
the diameter of the bubbles was 45 μm;
the pressure of the reflux booster pump 22 was 4.5kg/cm 3 The power of the dissolved air releaser 25 was 5kw;
s3: the slag scraping blade 32 of the slag scraping machine 31 scrapes and conveys the air-entrained flocs in the floating slag layer to the slag collecting groove 34, and the air-entrained flocs are conveyed into a recovery facility on the shore through the slag outlet 33, and the flocs can be used as phosphate fertilizer after being dehydrated;
s4: monitoring the concentration of pollutants in the water body to be treated at different depths by using an on-line monitoring electrode, and transmitting the monitoring result to a controller;
according to the concentration of phosphorus-containing pollutants in water bodies at different depths, the water inlet depth of the electric lifting arm is regulated and controlled so that the shell 11 is placed in the water body to be treated with the highest pollution concentration, and therefore pollutants in the water body to be treated are removed accurately;
according to the concentration of pollutants in the water body to be treated, the turning period, the output current and the output voltage of the direct-current power supply 16 are regulated by combining the machine learning result, and meanwhile, the electrode plate turning period is regulated by combining the concentration of the pollutants, so that the output power of the dissolved air releaser 25 is regulated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The treatment device for the river and lake water body is characterized by comprising an electric flocculation unit, an air floatation unit, a deslagging unit, an ultrasonic algae removal unit and an ecological floating island unit;
the electric flocculation unit is provided with a shell, the shell is provided with a reaction cavity, the reaction cavity is provided with a water body inlet to be treated and a purified water outlet, a first polar plate and a second polar plate are alternately arranged in the reaction cavity, and electrolytic ions generated by electrolysis of the first polar plate and the second polar plate form flocs with pollutants in the water body to be treated;
the ultrasonic algae removal unit generates ultrasonic waves to crush algae to obtain algae residues;
the air floatation unit comprises an aeration piece, the aeration piece is arranged in the reaction cavity, and bubbles generated by the aeration piece carry the flocs and the algae residues to float on the top of the reaction cavity;
at least part of the deslagging unit is arranged at the top of the reaction cavity and is used for removing flocs at the top of the reaction cavity;
the ecological floating island unit is located above the deslagging unit, the ecological floating island comprises a gel matrix layer, a nutrient soil layer and a vegetation layer which are sequentially stacked, and the gel matrix layer is close to the deslagging unit.
2. The processing apparatus of claim 1, wherein the reaction chamber comprises a bottom wall and side walls perpendicular to the bottom wall, the side walls comprising first, second, third and fourth side walls that are end-to-end; the first side wall is arranged opposite to the third side wall, and the second side wall is arranged opposite to the fourth side wall;
the water body inlet to be treated is arranged on the first side wall and/or the third side wall;
the first polar plate and the second polar plate are respectively parallel to the first side wall;
the first polar plate is close to the second side wall, and the second polar plate is close to the fourth side wall.
3. The processing apparatus according to claim 1 or 2, wherein the air floatation unit further comprises a reflux booster pump, an air compressor, a pressure dissolved air tank, a dissolved air releaser;
the purified water outlet is communicated with the inlet of the reflux booster pump, the outlet of the reflux booster pump is communicated with the liquid phase inlet of the pressure dissolved air tank, the outlet of the air compressor is communicated with the gas phase inlet of the pressure dissolved air tank, the outlet of the pressure dissolved air tank is communicated with the inlet of the dissolved air releaser, and the outlet of the dissolved air releaser is communicated with the aeration piece; and/or the number of the groups of groups,
the slag removing unit comprises a slag scraping machine, wherein the slag scraping machine is provided with slag scraping paddles and a slag outlet;
and a slag scraping blade of the slag scraping machine scrapes and conveys the flocs at the top of the reaction cavity to a slag outlet.
4. A treatment device according to any one of claims 1-3, wherein the gel matrix layer is selected from a gel layer, a metal oxide layer or a gel-metal oxide composite layer.
5. The treatment apparatus according to claim 4, wherein the gel matrix layer is formed by sequentially baking and foaming sludge.
6. The treatment device according to any one of claims 1 to 5, wherein the nutrient soil layer is formed by aerobic fermentation treatment of sludge.
7. The treatment device of any one of claims 1-6, wherein the ultrasonic algae removal unit comprises an ultrasonic generator and an ultrasonic vibration plate electrically connected;
the ultrasonic vibration plate is arranged on at least part of the surface of the shell.
8. The treatment apparatus according to any one of claims 1-7, further comprising a lifting unit for controlling the position of the housing in the body of water to be treated.
9. The treatment device according to any one of claims 1 to 8, further comprising a control unit electrically connected to at least one of the electric flocculation unit, the air flotation unit, the deslagging unit, the ultrasonic algae removal unit, and the lifting unit.
10. A method of treating a body of water in a river or lake, characterized in that it is carried out using the apparatus for treating a body of water in a river or lake of any one of claims 1 to 9.
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