Constructed wetland and ultra-nano gas dissolution and reoxygenation compound system

Abstract

The utility model relates to a constructed wetland and an ultra-nano gas dissolution and reoxygenation compound system, which comprises a horizontal subsurface flow constructed wetland and a vertical subsurface flow constructed wetland which are sequentially arranged along the flowing direction of sewage, and an ultra-nano gas dissolution and reoxygenation unit communicated with the vertical subsurface flow constructed wetland, the ultra-nano gas dissolution and reoxygenation unit comprises an ultra-nano gas dissolution and reoxygenation main machine and an oxygen tank, and the ultra-nano gas dissolution and reoxygenation main machine is communicated with the tail end of the vertical subsurface flow constructed wetland through an ultra-nano water inlet pipe and is communicated with the front end of the vertical subsurface flow constructed wetland through a water outlet pipe. According to the utility model, the horizontal subsurface flow constructed wetland and the vertical subsurface flow constructed wetland are combined with the ultra-nano gas dissolving and reoxygenation unit, sewage treatment is optimized, the ammonia nitrogen and total nitrogen removal effect is improved by utilizing aerobic and anoxic environments, and meanwhile, the ultra-nano gas dissolving technology is used for oxygenation without disturbing water, the growth of microorganisms is guaranteed, the nitrogen and phosphorus removal effect is enhanced, and the water quality is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial wetlands, in particular to an artificial wetland and an ultra-nano aerosol reoxygenation composite system. Background Art

[0002] Wetlands are primarily categorized as subsurface flow wetlands and surface flow constructed wetlands. Surface flow wetlands, where wastewater comes into direct contact with the atmosphere, offer greater reoxygenation than subsurface flow wetlands, resulting in better wastewater treatment. However, the effectiveness of surface flow constructed wetlands is unstable and affected by many factors, such as seasonal variations. Subsurface flow wetlands are primarily categorized as vertical subsurface flow constructed wetlands and horizontal subsurface flow constructed wetlands. Vertical subsurface flow constructed wetlands have an up-and-down flow pattern, and the wetlands experience dryness, which enhances reoxygenation. Different vertical heights create varying oxygen concentrations, facilitating the growth of microorganisms with varying oxygen requirements. Vertical subsurface flow constructed wetlands are more effective at removing ammonia nitrogen. Horizontal subsurface flow constructed wetlands have a plug flow pattern, with the bed constantly filled with water. Reoxygenation is less effective than vertical flow. Horizontal subsurface flow wetlands have slower flow rates, creating an anaerobic environment that favors anaerobic denitrification, resulting in superior total nitrogen removal. Vertical subsurface flow constructed wetlands have stronger nitrification capacity than horizontal subsurface flow constructed wetlands, while horizontal subsurface flow has stronger denitrification reaction.

[0003] However, in actual operation, due to the structure of the wetland, the dissolved oxygen level inside is generally low, which inhibits the activity of aerobic microorganisms and the progress of various biochemical reactions, seriously affecting the denitrification and pollution removal effect of the artificial wetland. In addition, the carbon-nitrogen ratio of sewage in many cities is generally small, and difficult-to-degrade organic matter accounts for a certain proportion of it, which is not conducive to the normal denitrification of the wetland and also seriously affects the denitrification efficiency of the wetland.

[0004] In view of this, it is necessary to design an improved artificial wetland and ultra-nano aerosol reoxygenation composite system to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide an artificial wetland and an ultra-nano aerosol reoxygenation composite system to improve the oxygen supply environment inside the wetland, increase the dissolved oxygen content, and enhance the denitrification and phosphorus removal effect of the wetland.

[0006] To achieve the above-mentioned objectives, the utility model provides an artificial wetland and ultra-nano aerosol reoxygenation composite system, comprising a horizontal subsurface flow artificial wetland and a vertical subsurface flow artificial wetland arranged in sequence along the sewage flow direction, and an ultra-nano aerosol reoxygenation unit connected to the vertical subsurface flow artificial wetland, the ultra-nano aerosol reoxygenation unit comprising an ultra-nano aerosol reoxygenation main unit and an oxygen tank connected to the ultra-nano aerosol reoxygenation main unit, the ultra-nano aerosol reoxygenation main unit being connected to the tail end of the vertical subsurface flow artificial wetland through an ultra-nano water inlet pipe; the ultra-nano aerosol reoxygenation main unit being connected to the front end of the vertical subsurface flow artificial wetland through a water outlet pipe.

[0007] As a further improvement of the present invention, an air inlet pipe is further provided between the oxygen tank and the ultra-nano aerosol reoxygenation main unit.

[0008] As a further improvement of the present invention, the ultra-nano aerosol reoxygenation unit further includes a submersible pump, one end of which is connected to the ultra-nano water inlet pipe, and the other end of which is connected to the return pipe of the return pipeline.

[0009] As a further improvement of the present invention, the return pipeline is connected to the front end of the horizontal subsurface flow artificial wetland.

[0010] As a further improvement of the present invention, the vertical submerged flow artificial wetland includes a first water inlet channel connected to the outlet pipe, a first purification tank connected to the water inlet channel, and a first water outlet channel connected to the first purification tank. The submersible pump is arranged inside the first water outlet channel, and the ultra-nano water inlet pipe and the return pipe of the return pipeline respectively extend into the first water outlet channel and are connected to the submersible pump.

[0011] As a further improvement of the present invention, a first wetland filler is provided inside the first purification tank, and a first wetland plant is provided on the top of the first wetland filler.

[0012] As a further improvement of the present invention, a first pipe communicating with the first outlet channel is provided at the bottom of the first purification tank, and a first control valve is provided on the first pipe.

[0013] As a further improvement of the present invention, the horizontal subsurface flow artificial wetland includes a second water inlet channel connected to the return pipe of the return pipeline, a second purification tank connected to the second water inlet channel, and a second water outlet channel connected to the second purification tank, and the second water outlet channel coincides with the first water inlet channel.

[0014] As a further improvement of the present invention, a second wetland filler is provided inside the second purification tank, and a second wetland plant is provided on the top of the second wetland filler.

[0015] As a further improvement of the present invention, the second purification tank is connected to the first water inlet channel through a second pipe, and the second purification tank is provided with a third pipe connected to the second water outlet channel at the bottom of the end away from the first water inlet channel, and a second control valve is provided on the third pipe.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides an artificial wetland and ultra-nano aerosol reoxygenation composite system, comprising a horizontal subsurface artificial wetland and a vertical subsurface artificial wetland arranged in sequence along the flow direction of sewage, and an ultra-nano aerosol reoxygenation unit connected to the vertical subsurface artificial wetland, the ultra-nano aerosol reoxygenation unit comprising an ultra-nano aerosol reoxygenation main unit and an oxygen tank connected to the ultra-nano aerosol reoxygenation main unit, the ultra-nano aerosol reoxygenation main unit being connected to the tail end of the vertical subsurface artificial wetland through an ultra-nano water inlet pipe, and being connected to the front end of the vertical subsurface artificial wetland through an outlet pipe. Compared with the prior art, the vertical subsurface artificial wetland is in an aerobic environment, which is conducive to the decomposition of organic pollutants by aerobic microorganisms and has a better removal effect on ammonia nitrogen; the horizontal subsurface artificial wetland is in an anoxic and anaerobic state, which is conducive to anaerobic denitrification and has a better removal rate effect on total nitrogen; the ultra-nano aerosol reoxygenation unit oxygenates the water body, does not generate bubbles when increasing the dissolved oxygen in the water body, and does not cause any disturbance to the water body, thereby not affecting the normal biofilm growth of microorganisms in the wetland. At the same time, the first wetland plants, second wetland plants, first wetland fillers and second wetland fillers of the vertical subsurface flow artificial wetland and the horizontal subsurface flow artificial wetland filter and adsorb pollutants in the sewage, thereby further improving the nitrogen and phosphorus removal effects of the sewage after treatment, thereby greatly improving the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the artificial wetland and ultra-nano aerosol reoxygenation composite system provided by the utility model.

[0019] Reference numerals

[0020] 11. First water inlet channel; 12. First wetland filler; 13. First pipeline; 14. First control valve; 15. First wetland plant; 16. First water outlet channel; 17. First purification tank; 21. Second water inlet channel; 22. Second wetland filler; 23. Second pipeline; 24. Second control valve; 25. Second wetland plant; 26. Third pipeline; 27. Second purification tank; 31. Submersible pump; 32. Ultra-nano aerosol reoxygenation main unit; 33. Oxygen tank; 34. Ultra-nano water inlet pipe; 35. Water outlet pipe; 36. Air inlet pipe; 4. Return pipe. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in detail below in combination with the drawings and specific embodiments.

[0022] It should be further noted that, in order to avoid unnecessary details from obscuring the utility model, only structures and / or processing steps closely related to the scheme of the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0023] It should be further noted that the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0024] The utility model provides a kind of artificial wetland and super-nano gas solution reoxygenation composite system, including horizontal subsurface flow artificial wetland and vertical subsurface flow artificial wetland being sequentially arranged along the direction of sewage flow, and with vertical subsurface flow artificial wetland intercommunication's super-nano gas solution reoxygenation unit, super-nano gas solution reoxygenation unit includes super-nano gas solution reoxygenation host 32 and with super-nano gas solution reoxygenation host 32 intercommunication's oxygen tank 33, super-nano gas solution reoxygenation host 32 is communicated with the tail end of vertical subsurface flow artificial wetland by super-nano water inlet pipe 34, and is communicated with the front end of vertical subsurface flow artificial wetland by water outlet pipe 35.Oxygen tank 33 and super-nano gas solution reoxygenation host 32 between still be provided with air inlet pipe 36.

[0025] Super-nano gas solution reoxygenation unit also includes submersible pump 31, one end of submersible pump 31 is communicated with super-nano water inlet pipe 34, and the other end is communicated with the return pipe of return pipeline 4.Return pipeline 4 is communicated with the front end of horizontal subsurface flow artificial wetland.

[0026] Super-nano gas solution reoxygenation unit can provide sufficient dissolved oxygen to vertical subsurface flow artificial wetland, is favorable to the activity of aerobic microorganism, and enhances the decomposition ability of organic matter.Super-nano gas solution reoxygenation technology can increase the dissolved oxygen of water body without generating bubble, avoids the interference to the biofilm growth of microorganism in wetland.Through improving the oxygen supply inside wetland, it is helpful to maintain the stability and diversity of wetland ecological system.

[0027] The vertical submerged flow artificial wetland includes a first water inlet channel 11 connected to the outlet pipe 35, a first purification tank 17 connected to the first water inlet channel 11, and a first outlet channel 16 connected to the first purification tank 17. The submersible pump 31 is arranged inside the first outlet channel 16, and the ultra-nano water inlet pipe 34 and the return pipe of the return line 4 respectively extend into the first outlet channel 16 and are connected to the submersible pump 31. A first wetland filler 12 is arranged inside the first purification tank 17, and a first wetland plant 15 is arranged on the top of the first purification tank 17. A first pipe 13 connected to the first outlet channel 16 is provided at the bottom of the first purification tank 17, and a first control valve 14 is provided on the first pipe 13. The vertical submerged flow artificial wetland is in an aerobic environment, which is conducive to the decomposition of organic pollutants by aerobic microorganisms and has a good removal effect on ammonia nitrogen.

[0028] The horizontal subsurface flow artificial wetland includes a second water inlet channel 21 connected to the return pipe of the return line 4, a second purification tank 27 connected to the second water inlet channel 21, and a second water outlet channel connected to the second purification tank 27, and the second water outlet channel overlaps with the first water inlet channel 11. A second wetland filler 22 is provided inside the second purification tank 27, and a second wetland plant 25 is provided on the top of the second purification tank 27. The second purification tank 27 is connected to the first water inlet channel 11 through a second pipe 23. The second purification tank 27 is provided with a third pipe 26 connected to the second water outlet channel at the bottom of the end away from the first water inlet channel 11. The third pipe 26 is provided with a second control valve 24. The horizontal subsurface flow artificial wetland is in an anoxic and anaerobic state, which is conducive to anaerobic denitrification and has a good effect on the removal rate of total nitrogen.

[0029] This utility model utilizes a combination of horizontal and vertical subsurface flow constructed wetlands to more effectively treat organic pollutants, ammonia nitrogen, and total nitrogen in wastewater, enhancing nitrogen and phosphorus removal. Wetland plants and fillers in the system filter and adsorb pollutants from wastewater, further purifying the water. Ultra-nano aerosol reoxygenation technology is more energy-efficient and efficient than traditional aeration methods, reducing operating costs. The system's rational design facilitates daily maintenance and management, ensuring long-term stable operation.

[0030] The artificial wetland and ultra-nano aerosol reoxygenation composite system provided by the present invention are described below with reference to specific embodiments.

[0031] Example 1

[0032] See also Figure 1 As shown, this embodiment provides an artificial wetland and ultra-nano aerosol reoxygenation composite system, including a horizontal subsurface flow artificial wetland and a vertical subsurface flow artificial wetland arranged in sequence along the sewage flow direction, and the system also includes an ultra-nano aerosol reoxygenation unit connected to the vertical subsurface flow artificial wetland and configured to keep the vertical subsurface flow artificial wetland in an aerobic state.

[0033] The ultra-nano aerosol reoxygenation unit includes an ultra-nano aerosol reoxygenation main unit 32, an oxygen tank 33, an air inlet pipe 36, an ultra-nano water inlet pipe 34, a water outlet pipe 35, and a submersible pump 31. The ultra-nano aerosol reoxygenation main unit 32 is connected to the vertical submerged flow artificial wetland, the oxygen tank 33 is connected to the ultra-nano aerosol reoxygenation main unit 32, the air inlet pipe 36 is between the oxygen tank 33 and the ultra-nano aerosol reoxygenation main unit 32, the ultra-nano aerosol reoxygenation main unit 32 is connected to the tail end of the vertical submerged flow artificial wetland through the ultra-nano water inlet pipe 34, the ultra-nano aerosol reoxygenation main unit 32 is connected to the front end of the vertical submerged flow artificial wetland through the water outlet pipe 35, one end of the submersible pump 31 is connected to the ultra-nano water inlet pipe 34 and the other end is connected to the return pipe of the return pipe 4, and the return pipe of the return pipe 4 is connected to the front end of the horizontal submerged flow artificial wetland.

[0034] See also Figure 1 As shown, the vertical submerged flow artificial wetland includes a first water inlet channel 11, a first purification tank 17, a first water outlet channel 16, a first wetland filler 12, a first wetland plant 15, a first pipeline 13, and a first control valve 14. The first water inlet channel 11 is connected to the water outlet pipe 35, the first purification tank 17 is connected to the first water inlet channel 11, the first water outlet channel 16 is connected to the first purification tank 17, the submersible pump 31 is arranged inside the first water outlet channel 16, the ultra-nano water inlet pipe 34 and the return pipe of the return pipe 4 are respectively extended into the first water outlet channel 16 and connected to the submersible pump 31, the first wetland filler 12 is arranged inside the first purification tank 17, the top of which is provided with a first wetland plant 15, the bottom of the first purification tank 17 is provided with a first pipeline 13 connected to the first water outlet channel 16, and the first control valve 14 is provided on the first pipeline 13.

[0035] The horizontal subsurface flow constructed wetland includes a second inlet channel 21 connected to the return pipe of the return line 4, a second purification tank 27 connected to the second inlet channel 21, and a second outlet channel connected to the second purification tank 27. The second outlet channel overlaps with the first inlet channel 11. The second purification tank 27 is equipped with a second wetland filler 22, with second wetland plants 25 installed on its top. The second purification tank 27 is connected to the first inlet channel 11 via a second pipe 23. A third pipe 26 connected to the second outlet channel is installed at the bottom of the second purification tank 27 at the end away from the first inlet channel 11. The third pipe 26 is equipped with a second control valve 24.

[0036] The working principle of this embodiment is as follows:

[0037] The sewage to be treated enters the horizontal subsurface flow artificial wetland through the pipe network, that is, the sewage first enters the second inlet channel 21, and the second inlet channel 21 has oxygen-rich water flowing in through the return pipe 4. The oxygen-rich water is mixed with the sewage and enters the second purification tank 27. Due to the setting of the return ratio, the interior of the second purification tank 27 is in an anoxic and anaerobic state, which is conducive to anaerobic denitrification and can remove the total nitrogen of the sewage. In addition, the second purification tank 27 is provided with second wetland plants 25 and second wetland fillers 22, which can filter and adsorb pollutants in the sewage to achieve the purpose of primary purification. Then, the sewage after the primary purification flows into the second outlet channel, that is, the first inlet channel 11, and then flows out to the first outlet channel 16 through the first purification tank 17. The first purification tank 17 is in an aerobic state, which is conducive to Aerobic microorganisms decompose organic pollutants in sewage, and the first purification tank 17 is provided with a first wetland plant 15 and a first wetland filler 12 to filter and adsorb the pollutants in the sewage at the same time to achieve the purpose of secondary purification. In addition, in this embodiment, the ultra-nano aerosol reoxygenation unit is used to oxygenate the water in the first water inlet channel 11, wherein the submersible pump 31 continuously draws the water in the first water outlet channel 16 into the ultra-nano aerosol reoxygenation main unit 32, and the ultra-nano aerosol reoxygenation main unit 32 continuously draws oxygen from the oxygen tank 33 and combines it with the water and sends it to the first water inlet channel 11 through the outlet pipe 35. In this way, no bubbles will be generated when the dissolved oxygen in the water is increased, and there will be no disturbance to the water body, so it will not affect the normal biofilm growth of microorganisms in the first purification tank 17.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A constructed wetland and ultra-nano aerosol reoxygenation composite system, characterized in that: The invention comprises a horizontal subsurface flow artificial wetland and a vertical subsurface flow artificial wetland arranged in sequence along the flow direction of sewage, and an ultra-nano aerosol reoxygenation unit connected to the vertical subsurface flow artificial wetland. The ultra-nano aerosol reoxygenation unit comprises an ultra-nano aerosol reoxygenation main unit and an oxygen tank connected to the ultra-nano aerosol reoxygenation main unit. The ultra-nano aerosol reoxygenation main unit is connected to the tail end of the vertical subsurface flow artificial wetland through an ultra-nano water inlet pipe; the ultra-nano aerosol reoxygenation main unit is connected to the front end of the vertical subsurface flow artificial wetland through a water outlet pipe.

2. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 1, characterized in that: An air inlet pipe is also provided between the oxygen tank and the ultra-nano gas-dissolved reoxygenation main unit.

3. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 1, characterized in that: The ultra-nano aerosol reoxygenation unit further includes a submersible pump, one end of which is connected to the ultra-nano water inlet pipe, and the other end of which is connected to the return pipe of the return pipeline.

4. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 3, characterized in that: The return pipeline is communicated with the front end of the horizontal subsurface flow artificial wetland.

5. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 3, characterized in that: The vertical submerged flow artificial wetland includes a first water inlet channel connected to the outlet pipe, a first purification tank connected to the first water inlet channel, and a first water outlet channel connected to the first purification tank. The submersible pump is arranged inside the first water outlet channel, and the ultra-nano water inlet pipe and the return pipe of the return pipeline respectively extend into the first water outlet channel and are connected to the submersible pump.

6. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 5, characterized in that: A first wetland filler is provided inside the first purification pool, and a first wetland plant is provided on the top of the first wetland filler.

7. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 5, characterized in that: A first pipe communicating with the first outlet channel is provided at the bottom of the first purification tank, and a first control valve is provided on the first pipe.

8. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 5, characterized in that: The horizontal subsurface flow artificial wetland includes a second water inlet channel connected to the return pipe of the return pipeline, a second purification tank connected to the second water inlet channel, and a second water outlet channel connected to the second purification tank, and the second water outlet channel coincides with the first water inlet channel.

9. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 8, characterized in that: A second wetland filler is provided inside the second purification pool, and a second wetland plant is provided on the top of the second wetland filler.

10. The artificial wetland and ultra-nano aerosol reoxygenation composite system according to claim 9, characterized in that: The second purification tank is connected to the first water inlet channel through a second pipe. The second purification tank is provided with a third pipe connected to the second water outlet channel at the bottom of the end away from the first water inlet channel, and a second control valve is provided on the third pipe.

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