CN112279449A - Buried type synchronous river sewage treatment and ecological bank protection structure - Google Patents
Buried type synchronous river sewage treatment and ecological bank protection structure Download PDFInfo
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- CN112279449A CN112279449A CN201910668116.5A CN201910668116A CN112279449A CN 112279449 A CN112279449 A CN 112279449A CN 201910668116 A CN201910668116 A CN 201910668116A CN 112279449 A CN112279449 A CN 112279449A
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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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- E—FIXED CONSTRUCTIONS
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- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
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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
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- 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
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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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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Abstract
The invention provides a buried type synchronous river channel sewage treatment and ecological bank protection structure, wherein the structure main body is a reinforced concrete structure or a steel prefabricated member, can be buried in a river channel bank slope and is integrated with a river channel, and is divided into an aerobic chamber, a transition chamber, an anaerobic chamber and an ecological vegetation bank protection area; wherein the aerobic chamber is positioned at the left side of the structure, and the transition chamber, the anaerobic chamber and the ecological vegetation bank protection zone are positioned at the right side of the structure; the transition chamber is positioned on the left side of the anaerobic chamber; the transition chamber and the anaerobic chamber realize closed coverage through a cover plate; and one part of the ecological vegetation bank protection area is positioned at the upper parts of the transition chamber and the anaerobic chamber, and the other part of the ecological vegetation bank protection area is positioned at the right side of the anaerobic chamber. This bury formula synchronous river course sewage treatment and ecological revetment structure, possess ecological revetment function when can high-efficiently administering river course sewage, guarantee whole river course safety and stability, carry out ecological construction to the river course both sides simultaneously.
Description
Technical Field
The invention relates to a river sewage treatment method by microorganisms and plants, relates to river ecological bank protection, belongs to the technical field of river sewage treatment and river bank protection, and particularly relates to a river sewage treatment and ecological bank protection structure.
Background
In the rapid development of social economy and the steady promotion of urban progress, untreated production wastewater of part of enterprises and domestic sewage of part of coastal residents are directly or indirectly discharged into nearby rivers, so that the quality of river water flowing through urban areas is seriously polluted, and even the phenomenon of black and odorous water appears. The increasingly worsened water environment in urban areas seriously affects the urban environment quality and the daily life of coastal residents, and also restricts the sustainable and healthy development of social economy. Therefore, the comprehensive treatment of urban polluted rivers and the restoration of peripheral ecosystems become important problems to be solved in urban ecological construction.
For the treatment of river sewage, some processes have been developed and applied, such as constructing a recovery buffer zone, reducing river slopes, remodeling shoals and deep pools, artificial oxygenation, artificial floating islands, artificial wetlands and the like, but these methods have difficulty in achieving ideal treatment effects on heavily polluted river sewage. The biological-ecological method is a technology for transferring, converting and degrading pollutants in river sewage by utilizing cultivated plants and inoculated and cultivated microorganisms so as to purify polluted river water, has the advantages of good treatment effect, lower construction cost, low operation cost, no need of adding medicaments into a water body, no secondary pollution, capability of being fused with surrounding landscapes, creation of beautiful landscape environment and the like, and becomes a new favorite of river sewage treatment technology. However, how to solve the problems of serious loss of functional microorganisms, steady and increased biomass, environmental difference required by degradation of different pollutants and the like in river treatment by a biological-ecological method becomes the key to whether the technology can be successfully applied to river sewage treatment.
River bank protection is one of important works of city construction, more than the former adopts traditional hard bank protection technology, and this technology can satisfy needs such as flood control, shipping, but its main attention engineering structure security and durability of following, adopts traditional hard materials such as monotonous concrete, grout stone more, has neglected river bank ecological function, leads to ecological structure unbalance, and the ecosystem degradation, the self-cleaning ability of water reduces. The ecological bank protection is based on the functions and effects of the traditional bank protection, the ecological effect of the bank protection engineering is improved, the harmony and the common development among water, soil and organisms are realized, the high-quality natural environment state is constructed, the ecological bank protection has the ecological property, the landscape property and the permeability of the natural bank protection, the structural property and the stability of the hard bank protection, the self-maintenance and self-updating capacity of a river ecological system is improved, and the stability of the ecological system is improved, so that the ecological bank protection is the mainstream of the river regulation bank protection engineering.
Disclosure of Invention
The invention aims to solve the problems that the existing widely-adopted river sewage treatment technology is not ideal in effect, and the biological-ecological sewage treatment process cannot fully exert the functions in the river sewage treatment engineering due to serious biological loss, and the problems that the engineering steps are repeated, the treatment cost is high and the like are directly caused by independently carrying out the sewage treatment engineering and the bank protection engineering in the current river treatment process are solved. The structure realizes respective physical spaces of microorganisms with different functions through compartmentalization design, can stably gather the microorganisms with different functions and realize relative independence and mutual noninterference of required environmental conditions, thereby exerting degradation functions of the structure on different pollutants to the maximum extent; the advantages of the original biological and ecological treatment technology are maintained to the maximum extent through the optimal matching between the biological and ecological treatment technologies; a method for combining hard structures such as sand pebbles, concrete prefabricated blocks, impact-resistant ecological blankets and revetment plants with vegetation is adopted to form an amphoteric circulation system of substances, information and energy among water, soil and organisms on the basis of ensuring the effects of slope stability, water erosion resistance and water and soil loss resistance, so that self organization and self restoration are performed, the revetment not only has a landscape effect, but also can restore polluted river water and improve the self-purification capacity of rivers, and further the health of a river ecological system is guaranteed.
In order to solve the technical problems, the invention adopts the following technical scheme:
a main body of a buried type synchronous riverway sewage treatment and ecological bank protection structure is of a reinforced concrete structure or a steel prefabricated member, can be buried in a riverway bank slope, is integrated with a riverway and is landscape-coordinated. The structure is mainly divided into an aerobic chamber, a transition chamber, an anaerobic chamber and an ecological vegetation bank protection area. Wherein the aerobic chamber is positioned at the left side of the structure, and the transition chamber, the anaerobic chamber and the ecological vegetation bank protection zone are positioned at the right side of the structure; the transition chamber is positioned on the left side of the anaerobic chamber; the transition chamber and the anaerobic chamber realize closed coverage through a cover plate; and one part of the ecological vegetation bank protection area is positioned at the upper parts of the transition chamber and the anaerobic chamber, and the other part of the ecological vegetation bank protection area is positioned at the right side of the anaerobic chamber.
The aerobic chamber comprises a rainwater grate, a water inlet pipe, a gravel layer, a bearing plate, fiber fillers and an aeration pipe I from top to bottom, and aerobic activated sludge is added into the aerobic chamber; the aerobic chamber is communicated with the transition chamber through a slit between the right wall body of the aerobic chamber and the bottom of a structure, a slit between the right wall body of the aerobic chamber and the vertical partition plate I, and a slit between the vertical partition plate I and the cover plate. The transition chamber is internally provided with an aerator pipe II and fiber fillers, the aerator pipe II is positioned at the lower left corner of the transition chamber, activated sludge is added into the transition chamber, and the transition chamber is communicated with the anaerobic chamber through a slit between the vertical partition plate II and a structure bottom, a slit between the vertical partition plate II and the vertical partition plate III, and a slit between the vertical partition plate III and the cover plate. The anaerobic chamber is internally provided with fiber filler and is added with anaerobic denitrification sludge which is communicated with the dry building block area through a water outlet pipe. The ecological vegetation bank protection area comprises sand cobbles, geotextile, concrete precast blocks, impact-resistant ecological blankets, palmstones, dry masonry blocks, planting soil, bank protection plants, emergent aquatic plants or submerged plants.
The buried type synchronous riverway sewage treatment and ecological bank protection structure is characterized in that the aerobic chamber, the transition chamber and the anaerobic chamber in the buried type synchronous riverway sewage treatment and ecological bank protection structure are equal in length and width.
The right side wall of the aerobic chamber in the buried type synchronous riverway sewage treatment and ecological bank protection structure is as wide as a slit at the bottom of the structure and the aerobic chamber, the height of the slit is 5-10 cm, and the width of a gap between the right side wall of the aerobic chamber and the vertical partition plate I is 5-8 cm; the vertical partition plate I, the vertical partition plate II, the vertical partition plate III and the cover plate are all equal in width to the structure, the vertical partition plate I and the vertical partition plate III are hermetically connected with the bottom of the structure, a slit equal in width to the structure is reserved between the vertical partition plate I and the cover plate, and the height of the slit is 5-10 cm; the vertical partition plate II is in sealing joint with the cover plate, a slit with the same width as the structure is reserved at the bottom of the structure, and the height of the slit is 5-10 cm.
The length-width-height ratio of the aerobic chamber in the buried type synchronous riverway sewage treatment and ecological bank protection structure is 1 (3-5): 2-6, the aeration pipe I is positioned at the left lower corner of the aerobic chamber and laid along the width direction of the aerobic chamber, aeration round holes are formed in the aeration pipe I, the diameter of each round hole is 1-2 cm, and the aperture ratio is 0.3-0.5.
The rainwater grate in the buried type synchronous riverway sewage treatment and ecological bank protection structure is a top cover of an aerobic chamber, a water inlet pipe is positioned on the layer surface of a gravel layer, water distribution round holes are formed in the left side and the right side of the water inlet pipe, the diameter of each round hole is 1-1.5 cm, the thickness of the gravel layer is 15-20 cm, the particle size of gravel is 3-5 cm, a bearing plate at the bottom of the gravel layer is provided with a gap, the slotting rate is 0.5, the length of the gap is 8-12 cm, and the width of the gap is 2-4 cm.
Wherein, the aeration pipe II in the buried type synchronous river sewage treatment and ecological revetment structure transition chamber is positioned at the lower left corner of the transition chamber and laid along the width direction of the transition chamber, and aeration round holes are formed in the aeration pipe II, the diameter of each round hole is 1cm, and the aperture ratio is 0.2-0.4.
The sludge added into the buried type synchronous riverway sewage treatment and ecological bank protection structure anaerobic chamber is anaerobic denitrification sludge.
The inclination angle of a cover plate in the buried type synchronous riverway sewage treatment and ecological bank protection structure is the same as the bank slope angle of the riverway, and the cover plate is hermetically connected with the right side wall of the structure, the top of the vertical partition plate II and the right side wall of the aerobic chamber; the top of the cover plate is 10-20 cm lower than the top of the aerobic chamber.
The ecological vegetation bank protection area in the buried type synchronous riverway sewage treatment and ecological bank protection structure comprises an area above a cover plate and an area outside a wall body on the right side of the structure. Sand pebbles, geotextile, concrete precast blocks, impact-resistant ecological blankets and palmstones are sequentially covered in the upper area of the cover plate, and planting soil is filled in the concrete precast blocks; the outer area of the right wall of the structure comprises dry stones and river sediment which are connected with the bottom of the river bed.
The concrete prefabricated blocks in the buried type synchronous riverway sewage treatment and ecological bank protection structures are square or regular hexagon, the side length is 20-30 cm, the side thickness is 2-4 cm, the height is 20-30 cm, round holes are formed in the center of each side face, and the diameter of each round hole is 3-5 cm. Filling planting soil in the concrete precast block and planting native bank protection plants; and (4) planting emergent or submerged plants in the dry building stone blocks and the bottom mud area of the river channel.
The buried type anti-impact ecological blanket for the synchronous river sewage treatment and ecological bank protection structure is divided into four layers from bottom to top, wherein the first layer is a polyester composite fiber fabric, the second layer is a polyester non-woven fabric reverse filter layer, and the third layer is a grass seed and fertilizer layer; the fourth layer is wood pulp composite fiber fabric.
Compared with the prior art, the invention has the beneficial effects and advantages that:
1) the river sewage treatment and the ecological bank protection of the river are synchronously realized. The structure can be optimally designed according to relevant size parameters of a riverway to be treated and then buried in a riverway bank slope to form a bypass biological purification system parallel to the riverway, so that the water quality of a riverway water body can be efficiently purified; meanwhile, the ecological vegetation revetment area of the structure has an ecological revetment function, the ecological structure of the river channel is restored while the structural property and stability of the revetment are realized, the natural landscape of the river channel can be seamlessly integrated, and the efficient pollution control and ecological revetment engineering are realized simultaneously.
2) The ecological function is integrated. The ecological vegetation bank protection area can solve the defect that the traditional bank protection isolates soil and water, maintain the unified integrity of the ecology of the bank and the river channel and complete the natural transition between water and land. And a good living environment is provided for some aquatic animals which need to forage and lay eggs to the shore, and the biodiversity is better maintained.
3) The water body self-purification function. When the land pollutant permeates into the water area, the plants and root microorganisms growing in the vegetation shore protection area can use the pollutant as a nutrient source, so that the pollutant removal effect is achieved, the diffusion of surface source pollution such as agricultural irrigation to rivers is reduced, and the risk of the polluted rivers is reduced. In addition, emergent or submerged plants growing in dry stones in the ecological vegetation bank protection area can absorb and utilize pollutants in river water, play a role in purifying river sewage, and can play a certain role in repairing polluted rivers, particularly urban inland rivers.
4) And the erosion of the bank slope and the soil loss are prevented. The selection of materials and materials of the ecological vegetation bank protection area, the structural form and the arrangement position can effectively prevent hydraulic erosion and soil loss. The geotextile and the concrete precast block can effectively prevent soil loss when rainwater seeps, and the sand gravel layer can enable rainwater to flow into a river channel along the structure cover plate quickly; the upper impact-resistant ecological blanket has strong impact resistance, the impact flow rate can reach 4m/s, and the upper impact-resistant ecological blanket can be combined with the palmitstone to prevent the surface soil from seriously losing under the condition of strong overflow.
5) High dirt-treating and shock-resisting power. The functional microorganisms can be fixedly gathered by fixing the working compartments of the functional microorganisms and arranging the fiber filler with high adhesion performance, so that the amount of the functional microorganisms is remarkably increased, and the bottleneck problems of serious loss and poor effect of the functional microorganisms in the conventional biological treatment process of the river sewage are solved; through the automatic setting of the aeration start-stop of the transition chamber, the flexible allocation of the volume of the aerobic zone and the volume of the anaerobic zone can be realized, so that the decontamination efficiency of microorganisms with unit functions is improved to the maximum extent. The difference between the water quality and the water quantity of the river channel in rainy and dry seasons is large, and the sewage treatment effect can be ensured under the severe fluctuation of the water quality and the water quantity by flexibly adjusting the high biological holding quantity in the structure and the aerobic and anaerobic functions of the transition chamber.
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of a buried type synchronous river sewage treatment and ecological bank protection structure;
FIG. 2 is a schematic structural view of a concrete precast block;
wherein: 1. an aerobic chamber; 2. a transition chamber; 3. an anaerobic chamber; 4. ecological vegetation shore protection areas; 5. a rainwater grate; 6. a water inlet pipe; 7. a gravel layer; 8. a support plate; 9. a fibrous filler; 10, an aeration pipe I; 11. a vertical partition plate I; 12. an aeration pipe II; 13. a vertical clapboard II; 14. a cover plate; 15. sand and pebbles; 16. geotextile; 17. concrete precast blocks; 18. planting soil; 19. an impact-resistant ecological blanket; 20. (ii) a palmite; 21. Revetment plants; 22. dry building stone blocks; 23. emerging or submerged plants; 24. a water outlet pipe; 25. and a vertical partition plate III.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In the following description, a detailed construction will be set forth in order to provide a thorough understanding of the present invention. It is apparent that the invention may be practiced without limitation to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in the figure 1-2, the main body of the buried type synchronous riverway sewage treatment and ecological bank protection structure is a reinforced concrete structure or a steel prefabricated member, can be buried in a riverway bank slope, is integrated with a riverway and is coordinated with the landscape. The structure is mainly divided into an aerobic chamber 1, a transition chamber 2, an anaerobic chamber 3 and an ecological vegetation shore protection area 4. Wherein the aerobic chamber 1 is positioned at the left side of the structure, and the transition chamber 2, the anaerobic chamber 3 and the ecological vegetation shore protection area 4 are positioned at the right side of the structure; a part of the ecological vegetation bank protection area 4 is positioned at the upper parts of the transition chamber 2 and the anaerobic chamber 3, and a part of the ecological vegetation bank protection area is positioned at the right side of the anaerobic chamber 3; the transition chamber 2 is positioned at the left side of the anaerobic chamber 3; the transition chamber 2 and the anaerobic chamber 3 are sealed and covered by a cover plate 14.
The aerobic chamber 1 comprises a rainwater grate 5, a water inlet pipe 6, a gravel layer 7, a supporting plate 8, fiber fillers 9 and an aeration pipe I10 from top to bottom respectively, and aerobic activated sludge is added into the aerobic chamber 1; the aerobic chamber 1 is communicated with the transition chamber 2 through a slit between the right wall body of the aerobic chamber 1 and the bottom of a structure, a slit between the right wall body of the aerobic chamber 1 and the vertical partition plate I11, and a slit between the vertical partition plate I11 and the cover plate 14. The transition chamber 2 comprises an aeration pipe II 12 and a fiber filler 9, the aeration pipe II 12 is positioned at the lower left corner of the transition chamber 2, activated sludge is added into the transition chamber 2, and the transition chamber 2 is communicated with the anaerobic chamber 3 through a slit between the vertical partition plate II 13 and the bottom of a structure, a slit between the vertical partition plate II 13 and the vertical partition plate III 25, and a slit between the vertical partition plate III 25 and the cover plate 14. The anaerobic chamber 3 is internally provided with fiber filler 9 and is added with anaerobic denitrification sludge which is communicated with the dry masonry block area 22 through a water outlet pipe 24. The ecological vegetation bank protection area 4 comprises sand pebbles 15, geotextiles 16, concrete precast blocks 17, impact-resistant ecological blankets 19, palmstones 20, dry masonry blocks 22, planting soil 18, bank protection plants 21 and emergent aquatic plants or submerged plants 23.
The working process of the buried type synchronous river sewage treatment and ecological bank protection structure provided by the invention is as follows:
1) the river sewage treatment working process comprises the following steps: river sewage is pumped into the water inlet pipe 6 by the submersible pump and flows into the gravel layer 7 through the water distribution circular holes on the left side and the right side of the water inlet pipe 6, suspended matters in the sewage can be intercepted and removed by the gravel layer 7, meanwhile, the gravel layer 7 can break and disperse water flow, uniform water distribution to the aerobic chamber 1 is realized, the sewage enters the aerobic chamber 1 and then is in full mixing contact with air entering the aerobic chamber 1 through the aeration pipe I10 by the gas compressor, the air is attached to the fiber filler 9 and aerobic active sludge suspended in the aerobic chamber 1, the aerobic microorganisms can directly degrade organic matters in the sewage, phosphorus in the sewage is adsorbed and utilized, and ammonia nitrogen in the sewage is subjected to aerobic nitrification to generate nitrate. The sewage treated by the aerobic chamber 1 sequentially enters the transition chamber 2 through a slit between the right wall of the aerobic chamber 1 and the bottom of a structure, a slit between the right wall of the aerobic chamber 1 and the vertical partition plate I11, and a slit between the vertical partition plate I11 and the cover plate 14, the transition chamber 2 can adopt an aeration or aeration stopping operation mode according to the water quality condition of effluent, an aerobic environment and an anaerobic environment can be respectively formed in different modes, and the aerobic removal or anaerobic removal function of pollutants is realized under different working conditions. The sewage treated by the transition chamber 2 enters the anaerobic chamber 3 through a slit between the vertical partition plate II 13 and the bottom of the structure, a slit between the vertical partition plate II 13 and the vertical partition plate III 25, and a slit between the vertical partition plate III 25 and the cover plate 14, under the anaerobic condition, under the action of anaerobic denitrification sludge, nitrate nitrogen generated in the sewage under the aerobic condition is subjected to denitrification reaction to generate nitrogen, and in the process, residual organic matters in the sewage are used as a carbon source to remove nitrogen pollutants and further degrade the organic matters. A small amount of nitrogen and phosphorus pollutants which are remained after degradation in the anaerobic chamber 3 enter the dry masonry blocks 22 and the river bed bottom mud area of the ecological plant shore protection area 4 through the water outlet pipe 24 and contact with emergent water or submerged plant root systems in the area, the remained nitrogen and phosphorus are further absorbed and utilized under the action of the root systems and root system microorganisms, and river sewage enters the river water body again after being purified.
After the non-point source sewage and other types of sewage flowing along the bank slope enter the ecological vegetation bank protection area 4, the ecological vegetation bank protection area 4 can enable the pollution reduction function similar to that of an artificial wetland, pollutants in the sewage can be intercepted by physical adsorption, biodegraded and absorbed and utilized by root systems in the process of flowing through planting soil 18, bank protection plants 21, geotextile 16 and sand pebbles 15, so that the pollutants can be degraded and removed, and the purified sewage finally enters a river water body through an opening on a concrete prefabricated part 17 or gaps of the sand pebbles 15.
2) River bank ecological bank protection principle: firstly, both the palmite 20 on the upper layer of the ecological vegetation bank protection area 4 and the impact-resistant ecological blanket 19 can grow bank protection plants 21, planting soil 18 is filled in the concrete precast block 17, a powerful growing environment is provided for the growth of the bank protection vegetation 21, and a natural vegetation community structure and a biological habitat are established by combining wild local plants, trees, shrubs and grasses; the developed root system of the plant can enhance the water storage and soil fixation capacity of the embankment, enhance the water and soil conservation and erosion prevention capacity, can also form good landscape effect and has both landscape value and protection value; the palmite 20 and a large number of vegetation can effectively reduce the erosion of wind and rain to the soil surface and slow down the erosion of rain, river water and the like to the soil; thirdly, the sand pebbles 15, the concrete prefabricated part 17 with the holes and the palmite 20 can ensure the mutual connection among water, soil and gas and keep the transverse connectivity of the river; the impact-resistant ecological blanket 19 and the geotextile 16 have the filtering function of water and soil permeation, so that the soil loss can be prevented, and the normal communication of water in the soil can be realized; dry masonry blocks 22 are regularly built or irregularly built, the river sediment is gradually filled in the stone gaps, the rough surface of the dry masonry blocks can provide good living and multiplying places for aquatic plants, aquatic animals and amphibians, and the biological diversity of the river water body is favorably maintained.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered to be limited to the specific forms set forth in the embodiments. It should be understood that modifications and variations can be resorted to by those skilled in the art, and that the scope of the invention includes equivalents as would be understood by those skilled in the art upon the basis of the teachings herein.
Claims (10)
1. The utility model provides a bury formula synchronous river course sewage treatment and ecological revetment structure which characterized in that: the main body of the structure is a reinforced concrete structure or a steel type prefabricated member, can be buried in a bank slope of a river channel and is integrated with the river channel, and the structure is divided into an aerobic chamber, a transition chamber, an anaerobic chamber and an ecological vegetation bank protection area; wherein the aerobic chamber is positioned at the left side of the structure, and the transition chamber, the anaerobic chamber and the ecological vegetation bank protection zone are positioned at the right side of the structure; the transition chamber is positioned on the left side of the anaerobic chamber; the transition chamber and the anaerobic chamber realize closed coverage through a cover plate; and one part of the ecological vegetation bank protection area is positioned at the upper parts of the transition chamber and the anaerobic chamber, and the other part of the ecological vegetation bank protection area is positioned at the right side of the anaerobic chamber.
2. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 1, wherein: the aerobic chamber comprises a rainwater grate, a water inlet pipe, a gravel layer, a bearing plate, fiber fillers and an aeration pipe I from top to bottom, and aerobic activated sludge is added into the aerobic chamber; the aerobic chamber is communicated with the transition chamber through a slit between the right wall body of the aerobic chamber and the bottom of a structure, a slit between the right wall body of the aerobic chamber and the vertical partition plate I, and a slit between the vertical partition plate I and the cover plate; the transition chamber comprises an aeration pipe II and fiber fillers, the aeration pipe II is positioned at the lower left corner of the transition chamber, activated sludge is added into the transition chamber, and the transition chamber is communicated with the anaerobic chamber through a slit between the vertical partition plate II and the bottom of a structure, a slit between the vertical partition plate II and the vertical partition plate III, and a slit between the vertical partition plate III and a cover plate; a fiber filler is arranged in the anaerobic chamber, anaerobic denitrification sludge is added, and the anaerobic chamber is communicated with the dry masonry block area through a water outlet pipe; the ecological vegetation bank protection area comprises sand pebbles, geotextiles, concrete prefabricated blocks, impact-resistant ecological blankets, palmstones, dry masonry blocks, planting soil, bank protection plants, emergent aquatic plants or submerged plants.
3. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 1, wherein: the buried type synchronous river sewage treatment and ecological bank protection structure is equal in length and width of an aerobic chamber, a transition chamber and an anaerobic chamber.
4. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the right side wall of the aerobic chamber in the buried type synchronous riverway sewage treatment and ecological bank protection structure is as wide as a slit at the bottom of the structure and the aerobic chamber, the height of the slit is 5-10 cm, and the width of a gap between the right side wall of the aerobic chamber and the vertical partition plate I is 5-8 cm; the vertical partition plate I, the vertical partition plate II, the vertical partition plate III and the cover plate are all equal in width to the structure, the vertical partition plate I and the vertical partition plate III are hermetically connected with the bottom of the structure, a slit equal in width to the structure is reserved between the vertical partition plate I and the cover plate, and the height of the slit is 5-10 cm; the vertical partition plate II is in sealing joint with the cover plate, a slit with the same width as the structure is reserved at the bottom of the structure, and the height of the slit is 5-10 cm.
5. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the length-width-height ratio of the aerobic chamber in the buried type synchronous riverway sewage treatment and ecological bank protection structure is 1 (3-5): 2-6, the aeration pipe I is positioned at the left lower corner of the aerobic chamber and laid along the width direction of the aerobic chamber, aeration round holes are formed in the aeration pipe I, the diameter of each round hole is 1-2 cm, and the aperture ratio is 0.3-0.5.
6. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the rainwater grate in the buried type synchronous riverway sewage treatment and ecological bank protection structure is a top cover of an aerobic chamber, a water inlet pipe is positioned on the layer surface of a gravel layer, water distribution round holes are formed in the left side and the right side of the water inlet pipe, the diameter of each round hole is 1-1.5 cm, the thickness of the gravel layer is 15-20 cm, the particle size of gravel is 3-5 cm, a bearing plate at the bottom of the gravel layer is provided with a gap, the slotting rate is 0.5, the length of the gap is 8-12 cm, and the width of the gap is 2-4 cm;
the aeration pipe II is arranged at the lower left corner of the transition chamber and laid along the width direction of the transition chamber in the buried type transition chamber of the synchronous river sewage treatment and ecological revetment structure, and aeration round holes are formed in the aeration pipe II, the diameter of each round hole is 1cm, and the aperture ratio is 0.2-0.4.
7. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the sludge added into the buried type synchronous riverway sewage treatment and ecological bank protection structure anaerobic chamber is anaerobic denitrification sludge.
8. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the inclination angle of a cover plate in the buried type synchronous river channel sewage treatment and ecological bank protection structure is the same as the bank slope angle of the river channel, and the cover plate is hermetically connected with the right side wall body of the structure, the top of the vertical partition plate II and the right side wall body of the aerobic chamber; the top of the cover plate is 10-20 cm lower than the top of the aerobic chamber.
9. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 2, wherein: the ecological vegetation bank protection area in the buried type synchronous riverway sewage treatment and ecological bank protection structure comprises an area above a cover plate and an area outside a wall body on the right side of the structure, wherein sand and pebbles, geotextile, a concrete precast block, an anti-impact ecological blanket and palmstone are sequentially covered on the area above the cover plate, and planting soil is filled in the concrete precast block; the outer area of the right wall of the structure comprises dry stones and river sediment which are connected with the bottom of the river bed.
10. The buried type synchronous riverway sewage treatment and ecological bank protection structure as claimed in claim 9, wherein: the concrete prefabricated blocks in the buried type synchronous riverway sewage treatment and ecological bank protection structure are square or regular hexagon, the side length is 20-30 cm, the side thickness is 2-4 cm, the height is 20-30 cm, circular holes are formed in the center of each side surface, and the diameter of each circular hole is 3-5 cm; filling planting soil in the concrete precast block and planting native bank protection plants; planting emergent or submerged plants in the dry building stone and the bottom mud area of the river channel;
the buried type synchronous riverway sewage treatment and anti-impact ecological blanket in the ecological bank protection structure is divided into four layers from bottom to top, wherein the first layer is a polyester composite fiber fabric, the second layer is a polyester non-woven fabric reverse filter layer, and the third layer is a grass seed layer and a fertilizer layer; the fourth layer is wood pulp composite fiber fabric.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115198696A (en) * | 2022-07-22 | 2022-10-18 | 中国葛洲坝集团第一工程有限公司 | Filling type ecological retaining wall structure and construction method thereof |
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