CN113620540A - Sewage treatment plant tail water treatment circulation system - Google Patents
Sewage treatment plant tail water treatment circulation system Download PDFInfo
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- CN113620540A CN113620540A CN202111038340.XA CN202111038340A CN113620540A CN 113620540 A CN113620540 A CN 113620540A CN 202111038340 A CN202111038340 A CN 202111038340A CN 113620540 A CN113620540 A CN 113620540A
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F2001/007—Processes including a sedimentation step
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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
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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
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- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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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
- C02F2209/11—Turbidity
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
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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
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- C02F2303/16—Regeneration of sorbents, filters
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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
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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
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a tail water treatment circulating system of a sewage treatment plant, which removes suspended matters in tail water by using a sedimentation tank, removes ammonia nitrogen pollutants in the tail water by using a biochemical treatment tank, adsorbs impurities floating in the tail water by using an adsorption treatment tank, reduces organic pollutants and inorganic pollutants in the tail water by using a biological purification tank, decomposes the organic pollutants in the tail water by using a vertical flow artificial wetland, simultaneously removes nitrogen and phosphorus, improves the dissolved oxygen content in the tail water by using a surface flow artificial wetland, increases the transparency of the tail water of a domestic sewage plant, reduces the contents of the suspended matters, ammonia nitrogen and total phosphorus, reduces the pollution of the tail water of the sewage plant to urban rivers, can be used as culture water for recycling after treatment, forms an ecological system, realizes the recycling of the tail water, can effectively utilize and save limited precious and saved resources, and can also relieve the overload phenomenon of urban fresh water sewers, bringing certain economic and popularization values.
Description
Technical Field
The invention relates to the technical field of water environment treatment, in particular to a tail water treatment circulating system of a sewage treatment plant.
Background
Along with the development of society, urban population is increased continuously, and the sewage generated by cities is more and more, and the sewage generated by the cities causes serious pollution to rivers around the cities. The sewage contains a large amount of organic matters, pollutants such as ammonia nitrogen, nitrite and the like can be generated by decomposing the organic matters in the water, and death threats are caused to fishes and aquatic weeds in rivers. With the improvement of ecological environment, the requirement of water environment quality is higher and higher. At present, the quality of effluent water treated by partial sewage treatment plants reaches the first-level A, first-level B and even second-level standards in the discharge Standard of pollutants for municipal Sewage treatment plants (GB18918-2002), but indexes such as COD (Chemical Oxygen Demand), total phosphorus, ammonia nitrogen and the like are still high, the treated water is discharged into natural water, which is still a hidden danger to water eutrophication, and the advanced treatment of tail water after sewage treatment is imperative. In addition, the tail water treatment technology of part sewage treatment plants is still immature, the treatment effect is poor, the operation cost is high, and the treated tail water cannot be recycled.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sewage treatment plant tail water treatment circulating system, which is used for carrying out advanced treatment on the tail water of a sewage treatment plant, so that the transparency of the tail water of a domestic sewage plant is improved, the contents of suspended matters, ammonia nitrogen and total phosphorus are reduced, the pollution of the tail water of the sewage plant to urban rivers is reduced, and the cyclic utilization of the tail water can be realized.
In order to solve the technical problems, the invention adopts the following technical scheme:
a tail water treatment circulating system of a sewage treatment plant comprises a sedimentation tank, a biochemical treatment tank, an adsorption treatment tank, a biological purification tank, a vertical flow artificial wetland and a surface flow artificial wetland, wherein the sedimentation tank is used for removing suspended matters in tail water through sedimentation; the biochemical treatment tank is internally provided with a compound microbial colony for removing ammonia nitrogen pollutants in the tail water treated by the sedimentation tank through nitration reaction; the adsorption treatment tank is internally provided with biological grid packing for adsorbing impurities floating in the tail water treated by the biochemical treatment tank; aquatic plants and aquatic animals are planted in the biological purification tank and used for purifying the tail water treated by the adsorption treatment tank, and organic pollutants and inorganic pollutants in the water are degraded by the aquatic plants and the aquatic animals; the vertical flow artificial wetland is used for decomposing organic pollutants in the tail water treated by the biological purification tank and simultaneously removing nitrogen and phosphorus; ornamental aquatic plants are planted in the surface flow constructed wetland and used for increasing the dissolved oxygen content in water through the ornamental aquatic plants.
Preferably, the bottom of the sedimentation tank is paved with impermeable HDPE plastic cloth.
Preferably, an ultraviolet sterilizing lamp for sterilizing and disinfecting the tail water is arranged in the biochemical treatment tank.
Preferably, the adsorption treatment tank is internally provided with microorganism filter balls and an aeration device for supplying oxygen to the microorganisms in the microorganism filter balls.
Preferably, the biogate filler is a solid-phase carbon source filler.
Preferably, the aeration device adopts air stone for air supply.
Preferably, the aquatic plants in the biological purification tank comprise one or more of duckweed, wolfkweed, eel grass, hydrilla verticillata and eyebright herb in any combination; the aquatic animals in the biological purification tank comprise feeding-considered aquatic organisms and omnivorous fishes, the feeding-considered aquatic organisms comprise one or more of herring, grass carp, silver carp, bighead carp and mussel which are combined randomly, and the omnivorous fishes comprise one or two of carp and crucian carp.
Preferably, the vertical flow artificial wetland is provided with a filler-plant microorganism ecosystem, the filler-plant microorganism ecosystem comprises a filler layer and a surface layer, the filler layer is a mixture of limestone and gravel, and the surface layer is planted with pinus avicens, white ginger flowers, water yams and cyperus alternifolius.
Preferably, the surface flow constructed wetland is provided with a water inlet area, a treatment area and a water outlet area, wherein the treatment area is provided with a dwarf plant area for planting Arundo donax Linn, a shallow marsh area for planting Potentilla repens, a marsh area for planting Typha and a deep marsh area for planting lotuses and water lily according to the water depth.
Preferably, the tail water treated by the biochemical treatment tank can flow back to the sedimentation tank for secondary treatment; the tail water treated by the adsorption treatment tank can flow back to the biochemical treatment tank or the sedimentation tank for secondary treatment; the tail water treated by the biological purification tank can flow back to the adsorption treatment tank, the biochemical treatment tank or the sedimentation tank for secondary treatment; the tail water treated by the vertical flow artificial wetland can flow back to a biological purification tank, an adsorption treatment tank, a biochemical treatment tank or a sedimentation tank for secondary treatment; the tail water treated by the surface flow artificial wetland can flow back to the biological purification tank for secondary treatment.
The invention has the beneficial technical effects that: the invention is adopted to carry out advanced treatment on the tail water of the sewage treatment plant, the sedimentation tank is utilized to remove suspended matters in the tail water, the biochemical treatment tank is utilized to remove ammonia nitrogen pollutants in the tail water, the adsorption treatment tank is utilized to adsorb impurities floating in the tail water, the biological purification tank is utilized to reduce organic pollutants and inorganic pollutants in the tail water, the vertical flow artificial wetland is utilized to decompose the organic pollutants in the tail water and simultaneously carry out nitrogen and phosphorus removal, the surface flow artificial wetland is utilized to improve the dissolved oxygen content in the tail water, so that the transparency of the tail water of the domestic sewage plant is improved, the contents of the suspended matters, ammonia nitrogen and total phosphorus are reduced, the pollution of the tail water of the sewage plant to the urban rivers is reduced, the treated effluent can also be used as the aquaculture water for recycling, an ecological system is formed, the cyclic utilization of the tail water is realized, the limited and valuable resources can be effectively utilized and saved, and the overload phenomenon of the urban sewer can be relieved, bringing certain economic and popularization values.
Drawings
Fig. 1 is a schematic structural view of a tail water treatment circulation system of a sewage treatment plant according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further described with reference to the accompanying drawings and examples.
As shown in fig. 1, in one embodiment of the present invention, a tail water treatment system of a sewage treatment plant includes a sedimentation tank, a biochemical treatment tank, an adsorption treatment tank, a biological purification tank, a vertical flow constructed wetland and a surface flow constructed wetland. The sedimentation tank is used for removing suspended matters in the tail water through sedimentation; the biochemical treatment tank is internally provided with a compound microbial colony for removing ammonia nitrogen pollutants in the tail water treated by the sedimentation tank through nitration reaction; the adsorption treatment tank is internally provided with biological grid packing for adsorbing impurities floating in the tail water treated by the biochemical treatment tank; aquatic plants and aquatic animals are planted in the biological purification tank and used for purifying the tail water treated by the adsorption treatment tank, and organic pollutants and inorganic pollutants in the water are degraded by the aquatic plants and the aquatic animals; the vertical flow artificial wetland is used for decomposing organic pollutants in the tail water treated by the biological purification tank and simultaneously removing nitrogen and phosphorus; ornamental aquatic plants are planted in the surface flow constructed wetland and used for increasing the dissolved oxygen content in water through the ornamental aquatic plants.
In this embodiment, the bottom of the sedimentation tank is paved with impermeable HDPE (High Density Polyethylene) plastic cloth. HDPE plastic cloth plays the isolation effect, can prevent that the granule from deposiing the pollution to groundwater, also makes things convenient for the clearance of staff to the granule sediment simultaneously.
In this embodiment, the composite microbial colonies put into the biochemical treatment tank include bacillus coagulans, bacillus lactis, bacillus natto, photosynthetic bacteria, yeast, and actinomycetes, and ammonia nitrogen pollutants in the tail water treated by the sedimentation tank are removed by using a nitrification reaction. In other embodiments of the present invention, the composite microbial colonies put into the biochemical treatment tank may be selected from other types of nitrifying bacteria, and the number of the types of bacteria may also be selected according to actual situations, i.e., one or more than two types of nitrifying bacteria may be selected.
In some preferred embodiments of the present invention, an ultraviolet sterilizing lamp is disposed in the biochemical treatment tank, the composite microbial colony and the ultraviolet sterilizing lamp are separately disposed, and the ultraviolet sterilizing lamp can sterilize and disinfect the tail water and further reduce the content of pollutants.
In this embodiment, the biological grid filler in the adsorption treatment tank adopts a solid-phase carbon source filler for adsorbing impurities floating in the tail water treated by the biochemical treatment tank.
In some preferred embodiments of the present invention, the adsorption treatment tank is provided with microorganism filter balls and an aeration device, wherein the aeration device uses air stone to supply oxygen for the microorganisms in the microorganism filter balls to effectively live, and provides conditions for the oxidative decomposition of organic pollutants.
In this embodiment, the aquatic plants planted in the biological purification tank include duckweed, wolffia, eel grass, hydrilla verticillata, and the like; the aquatic animals cultured in the biological purification pond comprise feeding-considered aquatic organisms and omnivorous fishes, wherein the feeding-considered aquatic organisms comprise black carps, grass carps, silver carps, bighead carps, freshwater mussels and the like, and the omnivorous fishes comprise carps, crucian carps and the like. Through the metabolism of aquatic animal and the aquatic plant in the biological purification pond, can, reduce organic pollutant and the inorganic pollutant in aquatic, can effectively purify quality of water. In other embodiments, the number of the types of the aquatic plants to be planted may be selected according to actual conditions, that is, one or more than two kinds of the aquatic plants may be selected. Similarly, the number of species of the feeding aquatic organisms and the omnivorous fishes may be selected according to actual conditions.
In this embodiment, the vertical flow constructed wetland is provided with a filler-plant microorganism ecosystem, the filler-plant microorganism ecosystem comprises a filler layer and a surface layer, the thickness of the filler layer is 2 meters, the filler layer is a mixture of limestone and gravel, and the surface layer is planted with pinus avicens, flowers of white ginger, water hyacinth and cyperus rotundus. When tail water treated by the biological purification tank passes through the vertical flow artificial wetland, organic pollutants are decomposed by microorganisms on the filler to remove ammonia nitrogen, pollutants such as nitrate nitrogen and the like and N elements are absorbed, converted or decomposed by plant metabolism (namely photosynthesis and respiration), and phosphorus-containing substances are subjected to phosphorus fixation and adsorption by matrixes such as limestone and gravel, so that the water quality is purified.
In this example, ornamental aquatic plants such as giant reed leaves, giant leaf tulip flowers, cattail, lotus flowers, water lily and the like are planted in the surface flow constructed wetland. The surface flow constructed wetland is provided with a water inlet area, a treatment area and a water outlet area, wherein the treatment area is provided with a dwarf plant area (with the depth of 0-0.1 meter) for planting floral leaf arundo donax linn, a shallow marsh area (with the depth of 0.1-0.2 meter) for planting big leaf rebirth flowers, a marsh area (with the depth of 0.2-0.3 meter) for planting cattail and a deep marsh area (with the depth of 0.3-1 meter) for planting lotus and water lily, the surface flow constructed wetland reoxydizes tail water treated by the vertical flow constructed wetland through ornamental aquatic plants, so that the dissolved oxygen content of the outlet water is improved, and the outlet water of the surface flow constructed wetland can be directly discharged into rivers and also can be used as culture water for reuse, thereby bringing ecological and economic values.
As shown in fig. 1, in a preferred embodiment of the present invention, the tail water of the sewage treatment plant is treated sequentially through a sedimentation tank, a biochemical treatment tank, an adsorption treatment tank, a biological purification tank, a vertical flow constructed wetland and a surface flow constructed wetland. Meanwhile, tail water treated by the biochemical treatment tank can flow back to the sedimentation tank for secondary treatment; the tail water treated by the adsorption treatment tank can flow back to the biochemical treatment tank or the sedimentation tank for secondary treatment, and the tail water treated by the adsorption treatment tank can directly flow into the vertical flow artificial wetland for treatment; the tail water treated by the biological purification tank can flow back to the adsorption treatment tank, the biochemical treatment tank or the sedimentation tank for secondary treatment; the tail water treated by the vertical flow artificial wetland can flow back to a biological purification tank, an adsorption treatment tank, a biochemical treatment tank or a sedimentation tank for secondary treatment; the tail water treated by the surface flow artificial wetland can flow back to the biological purification tank for secondary treatment. In the embodiment, the effluent of the biochemical treatment tank, the adsorption treatment tank, the biological purification tank, the vertical flow artificial wetland and the surface flow artificial wetland can flow into the next treatment flow or return to the previous treatment flow for repeated treatment, and after treatment, the effluent of the surface flow artificial wetland can be discharged into a river or used as water for culture for recycling, so that a recycling system is formed.
TABLE 1 actual measurement results of tail water before and after treatment with the present invention (tail water effluent reference first class B Standard)
As can be seen from Table 1, the tail water of domestic sewage is greatly changed before and after the treatment with the present invention. After the domestic sewage tail water is treated by the method, the transparency is improved, and suspended matters (SS), ammonia nitrogen and total phosphorus are reduced, so that the domestic sewage is effectively improved.
In summary, the invention is adopted to carry out advanced treatment on the tail water of the sewage treatment plant, the sedimentation tank is utilized to remove suspended matters in the tail water, the biochemical treatment tank is utilized to remove ammonia nitrogen pollutants in the tail water, the adsorption treatment tank is utilized to decompose organic pollutants in the tail water for oxidation decomposition and adsorb floating impurities, the biological purification tank is utilized to reduce organic pollutants and inorganic pollutants in the tail water, the vertical flow artificial wetland is utilized to decompose organic pollutants in the tail water and simultaneously carry out nitrogen and phosphorus removal, the surface flow artificial wetland is utilized to improve the dissolved oxygen content in the tail water, so that the transparency of the tail water of the domestic sewage plant is improved, the contents of suspended matters, ammonia nitrogen and total phosphorus are reduced, the pollution of the tail water of the sewage plant to urban rivers is reduced, the treated effluent can also be used as aquaculture water for recycling, an ecological system is formed, the recycling of the tail water can be effectively utilized and the limited waste water can be saved, Valuable fresh water resources can also relieve the overload phenomenon of urban sewers, and certain economic and popularization values are brought.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Various equivalent changes and modifications can be made by those skilled in the art based on the above embodiments, and all equivalent changes and modifications within the scope of the claims should fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a sewage treatment plant tail water treatment circulation system which characterized in that, sewage treatment plant tail water treatment system including:
the sedimentation tank is used for removing suspended matters in the tail water through sedimentation;
the biochemical treatment tank is filled with compound microbial colonies and is used for removing ammonia nitrogen pollutants in the tail water treated by the sedimentation tank through nitration reaction;
the adsorption treatment tank is internally provided with biological grid packing and is used for adsorbing impurities floating in the tail water treated by the biochemical treatment tank;
the biological purification tank is internally planted with aquatic plants and cultured with aquatic animals and is used for purifying the tail water treated by the adsorption treatment tank and reducing organic pollutants and inorganic pollutants in the water through the aquatic plants and the aquatic animals;
the vertical flow artificial wetland is used for decomposing organic pollutants in the tail water treated by the biological purification tank and simultaneously removing nitrogen and phosphorus;
the surface flow constructed wetland is internally planted with ornamental aquatic plants and is used for improving the dissolved oxygen content in the tail water treated by the vertical flow constructed wetland through the ornamental aquatic plants.
2. The wastewater treatment plant tailwater treatment cycle system of claim 1, wherein an impermeable HDPE plastic cloth is laid on the bottom of the sedimentation tank.
3. The wastewater treatment plant tail water treatment circulation system of claim 1, wherein an ultraviolet sterilizing lamp for sterilizing and disinfecting tail water is arranged in the biochemical treatment tank.
4. The wastewater treatment plant tailwater treatment circulation system according to claim 1, wherein the adsorption treatment tank is provided with microorganism filter balls and an aeration device for supplying oxygen to microorganisms in the microorganism filter balls.
5. The wastewater treatment plant tailwater treatment circulation system of claim 4, wherein the bio-grid filler is a solid carbon source filler.
6. The wastewater treatment plant tailwater treatment circulation system of claim 5, wherein the aeration device uses air stone for air supply.
7. The wastewater treatment plant tailwater treatment circulation system of claim 1, wherein the aquatic plants in the biological purification tank comprise one or more of duckweed, wolffia, eel grass, hydrilla verticillata and any combination of two or more of them; the aquatic animals in the biological purification tank comprise feeding-considered aquatic organisms and omnivorous fishes, the feeding-considered aquatic organisms comprise one or more of herring, grass carp, silver carp, bighead carp and mussel which are combined randomly, and the omnivorous fishes comprise one or two of carp and crucian carp.
8. The wastewater treatment recycle system of claim 1, wherein the vertical flow constructed wetland is provided with a filler-plant microorganism ecosystem, the filler-plant microorganism ecosystem comprises a filler layer and a surface layer, the filler layer is a mixture of limestone and gravel, and the surface layer is planted with windflower, white ginger flower, water taro and cyperus alternifolius.
9. The sewage treatment plant tail water treatment circulation system of claim 1, wherein the surface flow constructed wetland is provided with a water inlet area, a treatment area and a water outlet area, wherein the treatment area is provided with a dwarf plant area for planting floral-leaf arundo donax, a shallow marsh area for planting big-leaf religious flowers, a marsh area for planting cattail and a deep marsh area for planting lotus flowers and water lily according to water depth.
10. The wastewater treatment recycling system of a sewage treatment plant according to claim 1, wherein the wastewater treated by the biochemical treatment tank can flow back to the sedimentation tank for secondary treatment; the tail water treated by the adsorption treatment tank can flow back to the biochemical treatment tank or the sedimentation tank for secondary treatment; the tail water treated by the biological purification tank can flow back to the adsorption treatment tank, the biochemical treatment tank or the sedimentation tank for secondary treatment; the tail water treated by the vertical flow artificial wetland can flow back to a biological purification tank, an adsorption treatment tank, a biochemical treatment tank or a sedimentation tank for secondary treatment; the tail water treated by the surface flow artificial wetland can flow back to the biological purification tank for secondary treatment.
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Application publication date: 20211109 |