CN107253805B - Wetland device and method for enhancing removal of organic pollutants - Google Patents
Wetland device and method for enhancing removal of organic pollutants Download PDFInfo
- Publication number
- CN107253805B CN107253805B CN201710658246.1A CN201710658246A CN107253805B CN 107253805 B CN107253805 B CN 107253805B CN 201710658246 A CN201710658246 A CN 201710658246A CN 107253805 B CN107253805 B CN 107253805B
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- wetland
- vertical flow
- ozone
- ozone oxidation
- flow wetland
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
Abstract
A wetland device and a method for strengthening the removal of organic pollutants are disclosed, wherein the device is composed of an ascending vertical flow wetland (1) and an ozone oxidation pond (2); the ozone oxidation pond is positioned below the uplink vertical flow wetland substrate; a stainless steel net (5) and a stainless steel permeable supporting layer (4) are arranged between the upstream vertical flow wetland and the ozone oxidation tank. The particle size of the matrix of the upstream vertical flow wetland is larger than the aperture of the stainless steel mesh; a water inlet (7) and a water outlet (6) are reserved on the side surface of the upstream vertical flow wetland; ozone enters the ozone oxidation tank through an ozone inlet hole (3) reserved at the bottom. The method fully utilizes the byproduct oxygen in the ozone oxidation process to oxygenate the substrate and the roots of the vertical flow wetland, can make up for the defect of oxygen deficiency of the roots of the substrate of the vertical flow wetland, and greatly increases the effect of the vertical flow wetland on removing organic pollutants. The invention adopts the gravity-flow ascending vertical flow wetland to treat the organic pollutants without providing additional power.
Description
Technical Field
The invention relates to a wetland device and method for enhancing removal of organic pollutants, belonging to the technical field of environmental protection.
Background
The vertical flow artificial wetland integrates three functions of physics, chemistry and biology in the treatment of the wastewater. The surface of the filler and the plant root system in the wetland system will form a biofilm due to the growth of a large number of microorganisms. When the wastewater flows through the biological membrane, a large amount of SS is blocked and intercepted by the filler and the plant root system, and organic pollutants are removed through hydrolysis, aerobic respiration, absorption, assimilation and dissimilation of the biological membrane. Meanwhile, the wetland system is in an aerobic state, an anoxic state and an anaerobic state in the surrounding environment due to the transfer and release of oxygen by the plant root system, so that nitrogen and phosphorus in the wastewater can be removed through nitrification and denitrification.
However, as a technology for ecologically treating sewage, the treatment effect of the vertical flow artificial wetland is limited by a plurality of factors, the treatment effect is greatly influenced by factors such as water distribution, hydraulic retention time and the like, and the removal of organic matters by the vertical flow wetland is seriously influenced by insufficient dissolved oxygen in the wetland, the incomplete removal of the organic matters is guided, and the popularization and the application of the vertical flow wetland are influenced.
As a strong oxidant, ozone is applied to the sewage treatment process, and after the ozone is added into water, on one hand, the ozone directly degrades organic matters and reduces organic load entering an active carbon pool; on one hand, macromolecular organic matters are degraded into micromolecular organic matters, and the biodegradability of the organic matters in water is improved. The by-product after the oxidative decomposition of ozone is oxygen, which has the characteristic of no pollution, but the by-product oxygen is not utilized.
Disclosure of Invention
The invention aims to provide a wetland device and a method for enhancing organic pollutant removal in order to overcome the defects of a vertical flow wetland in the aspect of organic pollutant removal.
The technical scheme for realizing the invention is as follows: a wetland device for strengthening the removal of organic pollutants comprises an upstream vertical flow wetland and an ozone oxidation pond; the ozone oxidation pond is positioned below the uplink vertical flow wetland substrate; a stainless steel mesh and a stainless steel permeable supporting layer are arranged between the upstream vertical flow wetland and the ozone oxidation tank; the upper part of the ozone oxidation pond is provided with a stainless steel permeable supporting layer, and a stainless steel net is laid on the stainless steel permeable supporting layer and is used for supporting the vertical flow wetland; the particle size of the matrix of the upstream vertical flow wetland is larger than the aperture of the stainless steel mesh; a water inlet and a water outlet are reserved on the side surface of the upstream vertical flow wetland, and the water inlet is higher than the water outlet; ozone enters the ozone oxidation tank through an air inlet reserved at the bottom.
The water flow in the device is in the direction of that sewage enters an ozone oxidation tank from a water inlet; the water level of the ozone oxidation tank rises gradually along with the continuous entering of the sewage, and the water flow after the ozone treatment passes through the matrix packing layer and the wetland plant layer upwards and then is discharged out of the device through the water outlet.
The upward vertical flow wetland is an artificially arranged vertical wetland and comprises a matrix filler layer and a wetland plant layer; the substrate filler layer is arranged below the wetland plant layer; the substrate filler layer is a zeolite vermiculite layer, and the wetland plant layer is wetland plants.
The method for treating pollutants by the device comprises the following steps: sewage flows into the ozone oxidation pond from the inlet opening, and under the ozone effect, organic pollutant in ozone oxidation decomposition aquatic is along with ozone oxidation pond water inflow increase, and the sewage water level risees, when slowly passing through vertical current wetland matrix filler, and organic matter in the sewage is got rid of by filler biomembrane absorption assimilation and dissimilation, and then the sewage flows through wetland plant roots organic pollutant and is further got rid of by plant roots biomembrane. In the process, oxygen generated by the oxidative decomposition of ozone in the ozone oxidation pond enters the wetland substrate and the root system part of the plant along with water flow, so that the dissolved oxygen content in the wetland is supplemented, and the removal effect of the vertical flow wetland on organic pollutants is enhanced. The water flowing out of the vertical flow wet ground surface flows out of the treatment system through the water outlet.
The method has the advantages that the method fully utilizes the byproduct oxygen in the ozone oxidation process to oxygenate the substrate and the roots of the vertical flow wetland, can make up for the defect of oxygen deficiency of the roots of the substrate of the vertical flow wetland, and greatly increases the removal effect of the vertical flow wetland on organic pollutants. The invention adopts the gravity flow upward vertical flow wetland to treat the organic pollutants without providing additional power, greatly increases the hydraulic retention time in the vertical flow wetland and improves the effect of treating the organic pollutants by the vertical flow wetland.
Drawings
FIG. 1 is a schematic structural diagram of a wetland device for enhancing the removal of organic pollutants according to the invention;
in the figure, 1 is an ascending vertical flow wetland; 2 is an ozone oxidation pond; 3 is an ozone inlet hole; 4 is a stainless steel permeable supporting layer; 5 is a stainless steel mesh; 6 is a water outlet; 7 is a water inlet; and 8 is the water flow direction.
Detailed Description
A specific embodiment of the present invention is shown in fig. 1.
The wetland device for strengthening the removal of organic pollutants comprises a suspended type ascending vertical flow wetland 1 and an ozone oxidation pond 2 at the lower part. The ozone oxidation pond 2 is positioned at the lower layer of the matrix of the upstream vertical flow wetland 1, ozone enters the ozone oxidation pond 2 through an ozone inlet hole 3 reserved at the bottom, and the upper part of the ozone oxidation pond 2 is provided with a stainless steel permeable supporting layer 4 for supporting the upstream vertical flow wetland 1; a stainless steel mesh 5 is laid on the stainless steel permeable supporting layer 4, and an uplink vertical flow wetland 1 is laid on the stainless steel mesh 5; the particle size of the matrix of the upstream vertical flow wetland 1 is larger than the aperture of the stainless steel mesh; a water inlet 7 and a water outlet 6 are reserved on the side surface of the upstream vertical flow wetland, and the height of the water inlet 7 is higher than that of the water outlet 6; the water flow direction is 8 in the figure.
A method for strengthening the removal of organic pollutants is characterized in that an ozone oxidation pond is arranged below a suspended type upward vertical flow wet ground, and ozone enters the ozone oxidation pond through an ozone inlet reserved at the bottom; sewage flows into the ozone oxidation tank from the water inlet hole; under the action of ozone, the ozone oxidizes and decomposes organic pollutants in water; along with the increase of the water inlet of the ozone oxidation tank, the water level of the sewage rises, when the sewage slowly passes through the vertical flow wetland substrate filler, organic matters in the sewage are absorbed, assimilated and dissimilated by the filler biomembrane to be removed, and then organic pollutants in plant roots of the sewage flow through the wetland are further removed by the plant root biomembrane. In the process, oxygen generated by the oxidative decomposition of ozone in the ozone oxidation pond enters the wetland substrate and the root system part of the plant along with water flow, so that the dissolved oxygen content in the wetland is supplemented, and the removal effect of the vertical flow wetland on organic pollutants is enhanced. The water flowing out of the vertical flow wet ground surface flows out of the treatment system through the water outlet.
Claims (3)
1. A wetland device for strengthening the removal of organic pollutants is characterized in that the device consists of an upstream vertical flow wetland and an ozone oxidation pond; the ozone oxidation pond is positioned below the uplink vertical flow wetland substrate; a stainless steel mesh and a stainless steel permeable supporting layer are arranged between the upstream vertical flow wetland and the ozone oxidation tank; the upper part of the ozone oxidation pond is provided with a stainless steel permeable supporting layer, and a stainless steel net is laid on the stainless steel permeable supporting layer and is used for supporting the vertical flow wetland; the particle size of the matrix of the upstream vertical flow wetland is larger than the aperture of the stainless steel mesh; a water inlet and a water outlet are reserved on the side surface of the upstream vertical flow wetland, and the water inlet is higher than the water outlet; ozone enters the ozone oxidation tank through an air inlet reserved at the bottom; the water flow in the device is in the direction of that sewage enters an ozone oxidation tank from a water inlet; the water level of the ozone oxidation tank rises gradually along with the continuous entering of the sewage, and the water flow after the ozone treatment passes through the matrix packing layer and the wetland plant layer upwards and then is discharged out of the device through the water outlet.
2. The wetland device for enhancing the removal of organic pollutants according to claim 1, wherein the upstream vertical flow wetland is an artificial vertical wetland, the matrix filler layer is a zeolite vermiculite layer, and the wetland plant layer is wetland plants.
3. A method for removing pollutants by a wetland device for enhancing the removal of organic pollutants is characterized in that an ozone oxidation pond is arranged below a suspended type upward vertical flow wetland; ozone enters the ozone oxidation tank through an ozone inlet hole reserved at the bottom; sewage flows into the ozone oxidation tank from the water inlet hole; under the action of ozone, the ozone oxidizes and decomposes organic pollutants in water; the water level of the sewage rises along with the increase of the water inlet of the ozone oxidation tank, when the sewage slowly passes through the vertical flow wetland substrate filler, organic matters in the sewage are absorbed, assimilated and dissimilated by the filler biomembrane to be removed, and then organic pollutants in plant roots of the sewage flow through the wetland are further removed by the plant root biomembrane; in the process, oxygen generated by the oxidative decomposition of ozone in the ozone oxidation pond enters the wetland substrate and the plant root part along with water flow, so that the dissolved oxygen content in the wetland is supplemented, and the removal effect of the vertical flow wetland on organic pollutants is enhanced; the water flowing out of the vertical flow wet ground surface flows out of the treatment system through the water outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710658246.1A CN107253805B (en) | 2017-08-04 | 2017-08-04 | Wetland device and method for enhancing removal of organic pollutants |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710658246.1A CN107253805B (en) | 2017-08-04 | 2017-08-04 | Wetland device and method for enhancing removal of organic pollutants |
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| Publication Number | Publication Date |
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| CN107253805A CN107253805A (en) | 2017-10-17 |
| CN107253805B true CN107253805B (en) | 2020-12-29 |
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| CN201710658246.1A Active CN107253805B (en) | 2017-08-04 | 2017-08-04 | Wetland device and method for enhancing removal of organic pollutants |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108516619B (en) * | 2018-06-15 | 2023-12-19 | 亿利生态修复股份有限公司 | ecological floating island |
| CN110615536A (en) * | 2019-10-09 | 2019-12-27 | 山东省分析测试中心 | Wetland ecological purification system and construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253830A (en) * | 2013-05-30 | 2013-08-21 | 浙江海洋学院 | Biological pollution control method for industrial aquaculture wastewater |
| CN106242174A (en) * | 2016-08-25 | 2016-12-21 | 成都铭利特生物科技有限公司 | A kind of biological treatment device for sewage |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253830A (en) * | 2013-05-30 | 2013-08-21 | 浙江海洋学院 | Biological pollution control method for industrial aquaculture wastewater |
| CN106242174A (en) * | 2016-08-25 | 2016-12-21 | 成都铭利特生物科技有限公司 | A kind of biological treatment device for sewage |
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| CN107253805A (en) | 2017-10-17 |
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