CN111825283A - Ecological barrage and river water ecological restoration method - Google Patents
Ecological barrage and river water ecological restoration method Download PDFInfo
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- CN111825283A CN111825283A CN202010790154.0A CN202010790154A CN111825283A CN 111825283 A CN111825283 A CN 111825283A CN 202010790154 A CN202010790154 A CN 202010790154A CN 111825283 A CN111825283 A CN 111825283A
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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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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F3/30—Aerobic and anaerobic 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
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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
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
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Abstract
The invention relates to an ecological barrage and a river water ecological restoration method. The invention aims to provide an ecological barrage and a river water ecological restoration method. The technical scheme of the invention is as follows: an ecological weir dam which characterized in that: comprises a filtering unit, an aeration unit and a wetland unit which are arranged in sequence from upstream to downstream and have gradually-reduced heights. The invention is suitable for the technical field of ecological management.
Description
Technical Field
The invention relates to an ecological barrage and a river water ecological restoration method. Is applicable to the technical field of ecological management.
Background
With the rapid development of economy in China, the continuous expansion of urban scale and the increase of population, the sewage discharge amount is increasing day by day, and the water environment is damaged by pollution, so that the available water resources meeting the water quality standard are greatly reduced.
The outstanding water pollution problem in China at present is that the water pollutant load exceeds the self-purification capacity and the bearing capacity of an aqueous ecological system, and the eutrophication of water bodies in rivers and lakes is caused. Eutrophication of water quality occurs not only in closed or semi-closed waters such as lakes, reservoirs and gulfs, but also in stagnant urban inland river small bodies, rivers such as semi-closed creeks and rivers, and estuary waters.
The surface water bodies such as rivers, lakes and the like are gathering places for discharging various sewage, the sewage discharge is increased due to the aggravation of production and living activities of human beings, the dilution and purification effects of the river and lake water bodies are greatly weakened and exceed the self-purification capacity limit of the river and lake water bodies, so that pollutants are deposited in the water, on one hand, the water bodies are polluted and black and smelly, and on the other hand, the algae are overgrown and flooded.
Even if thorough sewage interception and dredging are carried out, because rivers and lakes are an open water environment, the standard-reaching wastewater discharged after being treated by urban sewage treatment plants and the standard-reaching wastewater discharged after being treated by the sewage generated by industrial enterprises and livestock and poultry centralized farms still contain certain pollutants; the livestock manure scattered in vast rural areas is difficult to avoid artificial waste disposal, and organic matters, nitrogen, phosphorus and other nutrient substances in surface soil flow into surface runoff caused by rainfall, snow and other atmospheric precipitation, and water quality of water bodies in rivers and lakes is polluted again after a long time due to continuous evaporation of the water bodies in the rivers and lakes, so that the problem of pollution of the water bodies in the rivers and lakes cannot be solved once and for all.
In view of the current situation that most of the existing river and lake water bodies are polluted or seriously polluted and the pollution still exists for a long time, the direct water body pollution in-situ treatment and purification and ecological restoration of the polluted river and lake water bodies are very necessary and urgent, the water pollution treatment and ecological environment restoration technologies which are generally adopted at present for intercepting and dredging, conducting water diversion and water changing to build large-range water flow circulation and conducting dynamic aeration and oxygenation all take high energy consumption and increase carbon emission as the cost, have the defects of high investment, high operation cost and large resource and energy consumption, and therefore, the development of the water body pollution in-situ treatment and purification and water ecological environment restoration technology which is low in investment, economical and applicable and energy-saving and emission-reducing type is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problems, an ecological barrage and a river water ecological restoration method are provided.
The technical scheme adopted by the invention is as follows: an ecological weir dam which characterized in that: comprises a filtering unit, an aeration unit and a wetland unit which are arranged in sequence from upstream to downstream and have gradually-reduced heights.
The filtering unit is provided with a stainless steel grid filter screen and a pebble water collecting area which are sequentially arranged along the water flow direction.
The pebble water collecting area comprises a pebble water collecting area with the particle size of 10-20mm and 5-10 mm.
The aeration unit comprises a main water inlet channel, a water distribution weir, a water distribution channel, a jet aeration mechanism and a biological aerated filter;
the water filtered by the filtering unit flows into the main water inlet channel, and is evenly distributed to the water distribution channel through the water distribution weir, the water distribution channel supplies water for the jet aeration mechanism, and the jet aeration mechanism injects water mixed air into the aeration biological filter tank.
And a filtering layer is arranged in the biological aerated filter and comprises a filtering material baffle, a filtering plate and a pebble bearing layer, and a jet aeration pipe of the jet aeration mechanism is arranged in the pebble bearing layer.
The wetland unit is provided with a pebble area and a wetland packed bed which are distributed up and down, and a wetland water level adjusting well for adjusting the water level.
The wetland packed bed packing has crushed stones with the grain diameter of 10-30 mm.
The depth of the wetland packed bed is 1-2 m, the bottom slope inclines from upstream to downstream, and the inclination is 20-30 degrees.
A river water ecological restoration method is characterized in that:
cleaning the water surface of the river to be treated, and putting microbial preparation strains;
the method comprises the following steps that the ecological barrage is built in a polluted area of a river to be treated, and water in the polluted area flows automatically through a water outlet and distribution channel or is lifted by a water pump to enter the ecological barrage to form a filtering loop;
planting aquatic plants in the river to be treated, putting fishes, and putting zooplankton and benthic mollusk to form an ecological circulation system;
restoring the beach body ecology of the river to be treated;
and constructing an ecological revetment for the soil slope of the river.
The microbial preparation strain comprises one or more of common heterotrophic aerobic bacteria, nitrifying bacteria, nitrosobacteria and denitrifying bacteria.
The invention has the beneficial effects that: the invention adopts a targeted measure to construct a river water body ecological system, realizes stable river water ecology with self-purification capacity, has long retention time of polluted water bodies, low load and good quality of effluent water, cannot generate secondary pollution when penetrating into underground water, and has the advantages of uniform water distribution and effective removal of algae, organic matters and nitrogen and phosphorus in the low-pollution water bodies.
Drawings
Fig. 1 is a schematic structural view of an ecological barrage in the embodiment.
1. A filtration unit; 11. stainless steel grid filter screen; 12. a pebble water collecting area; 2. an aeration unit; 21. a jet aeration pipe; 22. a filter layer; 3. a wetland unit; 31. a pebble zone; 32. a wetland packed bed.
Detailed Description
The embodiment is a river water ecological restoration method, which comprises the following steps
Cleaning the water surface of the river to be treated, and putting microbial preparation strains;
constructing an ecological weir dam in a polluted area of a river to be treated, and automatically flowing through a water outlet distribution channel or lifting into the ecological weir dam through a water pump to form a filtering loop;
planting aquatic plants in the river to be treated, putting fishes, and putting zooplankton and benthic mollusk to form an ecological circulation system;
restoring the beach body ecology of the river to be treated;
and constructing an ecological revetment for the soil slope of the river.
The ecological barrage in the embodiment is provided with a filtering unit, an aeration unit and a wetland unit which are sequentially arranged from upstream to downstream and have gradually-reduced heights.
In the embodiment, the filtering unit comprises a stainless steel grid filtering net and a pebble water collecting area with the grain diameter of 10-20mm and 5-10 mm which are sequentially arranged along the water flow direction, and the water flow passes through the stainless steel grid filtering net and the pebble water collecting area sequentially when passing through the filtering unit.
The aeration unit comprises a main water inlet channel, a plurality of water distribution weirs, a plurality of water distribution channels, a plurality of jet aeration mechanisms and a plurality of biological aerated filters, wherein the upper parts of the biological aerated filters are provided with filter layers, and the filter layers comprise filter material baffle plates, filter plates and pebble bearing layers. In this embodiment, the water filtered by the filtering unit flows into the main water inlet channel, the main water inlet channel evenly distributes the inlet water to a plurality of water distribution channels through the water distribution weir, the water distribution channels supply water for the corresponding jet aeration mechanisms, the jet aeration mechanisms inject the water mixed air into the aeration biological filter tank through the jet aeration pipe, and the jet aeration pipe is arranged in the pebble bearing layer.
The wetland unit comprises a pebble area, a wetland packed bed and a wetland water level adjusting well, wherein the wetland packed bed is filled with crushed stones or other fillers with the particle size of 10-30mm, the depth of the wetland packed bed is 1-2 m, and the inclination of a bottom slope is 20-30 degrees.
The wetland unit mainly selects plants with good water quality purification effect but low calamus, and plants such as hemerocallis middendorfii, tulbaghia vielacea, calliopsis japonica, hedyotis diffusa and bermuda grass are matched to establish a wetland system so as to keep the harmony between the height and the landscape.
The microbial preparation strains in the embodiment comprise one or more of common heterotrophic aerobic bacteria, nitrifying bacteria, nitrosobacteria and denitrifying bacteria. The pollutants in the water mainly comprise COD, BOD, NH3, N02, N03, P, S and the like, the microorganisms for removing the pollutants comprise the strains, the strains are rapidly propagated, the propagation period is much faster than that of the common algae of 2-12 hours/generation, more nutrients can be obtained in preference to the algae, the algae cultivation method has absolute advantages in quantity and speed, the nutrients in the water body are rapidly reduced, the nutrient sources of the algae are gradually cut off, and the effect of limiting the growth of the algae is achieved. Meanwhile, the rapid biochemical decomposition capacity of the microorganisms strengthens the natural degradation and purification functions of the water body on pollutants, thereby achieving the purposes of utilizing and strengthening the natural degradation and purification capacity of the water body, removing algae in the water body, degrading pollutants and purifying water quality.
In the embodiment, the aquatic plants absorb and convert nutrients such as nitrogen, phosphorus and the like in water and bottom mud, the content and turnover rate of nitrogen, phosphorus and essential trace elements in the water are reduced, and the growth of phytoplankton is inhibited; providing a good living environment for various aquatic organisms; the biological diversity of the water body is improved; the self-purification capacity of the water body is improved; oxygen is supplied to the water body. Wherein, bionic aquatic weeds with good hydrophilicity are adopted to replace rivers and lakes where aquatic plants cannot grow. In some black and odorous rivers and lakes, aquatic plants can also be used as inorganic nutrient substances in the water body, and the nutrient substances are discharged out of the water body by artificial harvesting. Submerged plants can not only migrate nutrients, but also serve as biofilm carriers in microbial environmental systems.
The embodiment ensures that the polluted water body is purified under the action of the soil and plant system, has long retention time, low load and good effluent quality, and cannot generate secondary pollution when seeping into underground water. After the low-pollution water body is treated by the wetland and the aeration, the water quality is obviously improved, and the low-pollution water body can be directly discharged into the original natural river through a downstream pipeline and a gate.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.
Claims (10)
1. An ecological weir dam which characterized in that: comprises a filtering unit, an aeration unit and a wetland unit which are arranged in sequence from upstream to downstream and have gradually-reduced heights.
2. The ecological barrage of claim 1, wherein: the filtering unit is provided with a stainless steel grid filter screen and a pebble water collecting area which are sequentially arranged along the water flow direction.
3. The ecological barrage of claim 2, wherein: the pebble water collecting area comprises a pebble water collecting area with the particle size of 10-20mm and 5-10 mm.
4. The ecological barrage of claim 1, wherein: the aeration unit comprises a main water inlet channel, a water distribution weir, a water distribution channel, a jet aeration mechanism and a biological aerated filter;
the water filtered by the filtering unit flows into the main water inlet channel, and is evenly distributed to the water distribution channel through the water distribution weir, the water distribution channel supplies water for the jet aeration mechanism, and the jet aeration mechanism injects water mixed air into the aeration biological filter tank.
5. The ecological barrage of claim 4, wherein: and a filtering layer is arranged in the biological aerated filter and comprises a filtering material baffle, a filtering plate and a pebble bearing layer, and a jet aeration pipe of the jet aeration mechanism is arranged in the pebble bearing layer.
6. The ecological barrage of claim 1, wherein: the wetland unit is provided with a pebble area and a wetland packed bed which are distributed up and down, and a wetland water level adjusting well for adjusting the water level.
7. The ecological barrage of claim 6, wherein: the wetland packed bed packing has crushed stones with the grain diameter of 10-30 mm.
8. The ecological barrage of claim 6, wherein: the depth of the wetland packed bed is 1-2 m, the bottom slope inclines from upstream to downstream, and the inclination is 20-30 degrees.
9. A river water ecological restoration method is characterized in that:
cleaning the water surface of the river to be treated, and putting microbial preparation strains;
the ecological barrage is constructed in a polluted area of a river to be treated, water in the polluted area flows automatically through an outlet water distribution channel or is lifted by a water pump to enter the ecological barrage to form a filtering loop;
planting aquatic plants in the river to be treated, putting fishes, and putting zooplankton and benthic mollusk to form an ecological circulation system;
restoring the beach body ecology of the river to be treated;
and constructing an ecological revetment for the soil slope of the river.
10. The river water ecological restoration method according to claim 9, characterized in that: the microbial preparation strain comprises one or more of common heterotrophic aerobic bacteria, nitrifying bacteria, nitrosobacteria and denitrifying bacteria.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117164100A (en) * | 2023-11-02 | 2023-12-05 | 日照城投环境科技集团有限公司 | Water treatment system and water treatment method for river entering sea |
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- 2020-08-07 CN CN202010790154.0A patent/CN111825283A/en active Pending
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|---|---|---|---|---|
| CN117164100A (en) * | 2023-11-02 | 2023-12-05 | 日照城投环境科技集团有限公司 | Water treatment system and water treatment method for river entering sea |
| CN117164100B (en) * | 2023-11-02 | 2024-01-26 | 日照城投环境科技集团有限公司 | Water treatment system and water treatment method for river entering sea |
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