CN111576339B - Ecological revetment for strengthening treatment of black and odorous water body by microorganisms - Google Patents
Ecological revetment for strengthening treatment of black and odorous water body by microorganisms Download PDFInfo
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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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- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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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
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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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
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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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- 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
- E02B3/122—Flexible prefabricated covering elements, e.g. mats, strips
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- C—CHEMISTRY; METALLURGY
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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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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
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Abstract
The invention provides an ecological bank protection for strengthening treatment of black and odorous water by microorganisms, belonging to the technical field of ecological bank protection. This ecological bank protection, including dry water level district bank protection unit, normal water level district bank protection unit, flood level district bank protection unit, dry water level district bank protection unit is strutted including throwing stone banket, the flexible ecological bag of microorganism, pine stake, the throwing stone banket is located waterside, the pine stake is strutted closely and is arranged and be located the inboard of throwing stone banket, the flexible ecological bag of microorganism is along the range upon range of setting in former river bank area and is located the pine stake and strut and throw the face native side of stone banket. The ecological revetment provided by the invention is mainly used in the field of ecological management. It can realize the wastes material of river course bed mud and recycle, simultaneously, can carry out high-efficient the administering to black smelly water, has saved the disposal engineering of river course bed mud, has certain environmental protection value, and has low cost, and the flexible ecological bag of microorganism is convenient for change, characteristics such as construction convenience.
Description
Technical Field
The invention belongs to the technical field of ecological bank protection, and particularly relates to an ecological bank protection for strengthening treatment of black and odorous water by microorganisms.
Background
The traditional bank protection engineering mostly adopts materials such as cement, mortar, stone, concrete, asphalt and the like, and the traditional bank protection engineering strives for economy on structure and engineering materials, is simple and convenient to construct, is focused on flood control function, often neglects the ecological effect of rivers, enables the rivers to lose the most basic ecological function, and has poor ecological landscape effect and relatively single function.
The ecological revetment follows the principles of recycling, reusing and sustainable development, rebuilds or repairs the land and water ecological structure of the original revetment of the river channel through artificial and natural effects, restores the traditional revetment engineering into the revetment with the permeability of the natural river bank, and has the functions of adjusting the hydrological state of the river, filtering pollutants, building a biological inhabitation environment, maintaining the biological diversity of the water body shore zone and the like.
CN201911010334.6 discloses a composite ecological bank protection structure and a construction method thereof, flood control, ecology and landscape functions of the river bank protection are organically combined according to different characteristics of each region of the river bank protection, the problem that the traditional bank protection is poor in ecology and landscape effects is solved, and the stability of an ecosystem and the bank protection of a river bank zone is improved.
However, most of the existing ecological revetments are limited to the composition of plant ecology, are biased to the construction of excellent water body revetments, and lack the purification function of water bodies, especially the purification function of black and odorous water bodies.
Disclosure of Invention
The invention provides an ecological revetment for strengthening microbial treatment of black and odorous water, which has the functions of revetment flood control, ecological restoration and landscape, solves the problems of ecological damage and poor landscape effect of the traditional revetment, and achieves the effects of treating black and odorous water and restoring and protecting an ecological system in a river bank zone.
The invention provides an ecological revetment for strengthening microbial treatment of black and odorous water, which comprises a dry water level area revetment unit, a normal water level area revetment unit and a flood level area revetment unit;
wherein, the soft ecological bag of withered water level district shore protection unit is strutted including throwing stone banket, the flexible ecological bag of first microorganism, pine stake, the throwing stone banket is located waterside, the pine stake is strutted and is densely arranged the setting and is located the inboard of throwing stone banket, the flexible ecological bag of first microorganism is along the range upon range of setting in former river bank area and is located the pine stake and strut and throw the face native side of stone banket.
Furthermore, a water treatment filler is arranged in the first microorganism flexible ecological bag, and the water treatment filler is composed of riverway bottom mud, calcium peroxide oxygen releasing agent particles, pyrite, calcium carbonate, sodium alginate and activated carbon.
Furthermore, the mass ratio of the riverway bottom mud, the calcium peroxide oxygen release agent particles, the pyrite, the activated carbon, the calcium carbonate and the sodium alginate is 100 (8-12): 5-10): 0.8-1.2.
Further, the first microorganism flexible ecological bag is prepared by the following steps:
1) taking the polluted bottom mud out of the polluted river channel, and dehydrating to obtain river channel bottom mud;
2) mixing the river sediment obtained in the step 1) with pyrite, activated carbon, calcium carbonate and sodium alginate, and then adding calcium peroxide oxygen-releasing agent particles to obtain a water treatment filler;
3) filling the water treatment filler obtained in the step 2) into a flexible ecological bag to obtain the microbial flexible ecological bag.
Further, in the step 1), dewatering until the water content of the river sediment is lower than 80%;
in the step 3), the method also comprises the step of placing the water treatment filler obtained in the step 2) until the water content is lower than 45%, and then placing the filler into a flexible ecological bag.
Further, the normal water level area revetment unit comprises an ecological buffer groove; the ecological buffer tank is arranged adjacent to the first microbial flexible ecological bag at the highest position, and the top of the ecological buffer tank is as high as the highest position of the first microbial flexible ecological bag;
the ecological buffer tank is internally provided with a water purification wetland and a water collection underdrain, the water purification wetland is positioned at the upper part of the water collection underdrain, the bottom of the water purification wetland is communicated with the water collection underdrain through a water outlet, and the water collection underdrain is communicated with an original riparian zone through a communicating pipe.
Further, a water storage module is arranged in the water collecting underdrain.
Furthermore, the flood level district revetment unit is including setting up the ecological meadow on former bank area, setting up and being in the diversion cross drainage ditch of ecological meadow bottom and the infiltration dam of setting between diversion cross drainage ditch and clean water wetland.
Furthermore, a second microorganism flexible ecological bag and a common ecological bag planted with ornamental grass are sequentially paved on the ecological grassland from bottom to top; the second flexible ecological bag of microorganism occupies 1/2~1/3 of ecological meadow area.
Furthermore, the percolation dam is arranged on the original river bank belt, and the bottom of the percolation dam is as high as the top of the ecological buffer tank.
The invention has the following advantages:
the invention provides an ecological revetment for strengthening microbial treatment of black and odorous water, which is divided into a dry water level region revetment unit, a normal water level region revetment unit and a flood water level region revetment unit according to water levels of different periods of a river channel, and an ecological revetment structure meeting the requirements of the revetment is constructed respectively aiming at main functions borne by different regions of the revetment.
The microbial flexible ecological bags with the function of strengthening microbial activity are respectively arranged in the dry water level area and the flood level area, and the synergistic effect of the river sediment, calcium peroxide, pyrite, calcium carbonate and the like is utilized to promote the activity of water purifying microbes in the river sediment and strengthen the microbial water purifying effect, so that the ecological revetment has flood carrying capacity and ecological landscape effect and also has the water purifying function, and further improves and recovers the water ecological system.
This ecological bank protection can carry out high-efficient the administering to black and odorous water body and rainwater runoff, simultaneously, can realize the wastes material of river course bed mud and recycle, has saved the processing of partial river course bed mud and has dealt with, has certain environmental protection and economic value, and has low cost, and the flexible ecological bag of microorganism is convenient for change, characteristics such as construction convenience.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an ecological revetment according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an ecological grass field according to an embodiment of the invention;
description of reference numerals:
1, protecting feet by throwing stones; a first microbial flexible ecological bag 2; a catchment underdrain 3; 4, purifying the water wetland; a percolation dam 5; a water diversion transverse ditch 6; 7, ecological grassland; a second microbial flexible ecological bag 71; a common ecological bag 72; supporting 8 by pine piles; an original riparian zone 9; an ecological buffer tank 10; a water storage module 11.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
As shown in fig. 1, an embodiment of the present invention provides an ecological bank protection for strengthening the microbial treatment of black and odorous water, including a dry water level area bank protection unit, a normal water level area bank protection unit, and a flood level area bank protection unit,
the unit of dry water level district shore protection is including throwing stone banket 1, the flexible ecological bag of first microorganism 2, pine stake strut 8, the riprap banket 1 is located the side of just having water, the pine stake is strutted 8 and is densely arranged the setting and is located the inboard of riprap banket 1, the flexible ecological bag of first microorganism 2 is along 9 range upon range of settings in former river bank area and is located 8 and the side of facing soil of riprap banket 1.
In the embodiment of the invention, in the shore protection unit of the dry water level area:
the microorganism flexible ecological bag arranged in a stacked mode can remove nitrogen, phosphorus and organic pollutants in the water body under the action of physics and microorganisms by enhancing the activity of microorganisms and carrying out slow reoxygenation on the water body, so that the long-term treatment of the water quality of the riverway is realized. Meanwhile, the riprap banket with better impact resistance is adopted, pine piles are densely arranged in the riprap banket for supporting and fixing, so that the supporting capacity and the stability are improved, and a habitat can be provided for benthonic animals.
In one embodiment of the invention, the water treatment filler is arranged in the microorganism flexible ecological bag and comprises riverway bottom mud, calcium peroxide oxygen releasing agent particles, pyrite, activated carbon, calcium carbonate and sodium alginate.
In one embodiment of the invention, the mass ratio of the river sediment, the calcium peroxide oxygen release agent particles, the pyrite, the activated carbon, the calcium carbonate and the sodium alginate is 100 (8-12): 5-10): 0.8-1.2.
Preferably, the mass ratio of the riverway bottom mud, the calcium peroxide oxygen releasing agent particles, the pyrite, the activated carbon, the calcium carbonate and the sodium alginate is 100:10:7:1:1: 1. It is noted that the calcium peroxide oxygen-releasing agent particles are prepared by conventional means, for example, the calcium peroxide oxygen-releasing agent particles can be prepared by the method of CN110184072A, using calcium peroxide powder as an oxygen-releasing agent, polylactic acid particles as an embedding medium, and dichloromethane as an intermediate medium.
In the embodiment of the invention, the bottom mud of the river contains complete denitrifying microorganism flora such as nitrobacteria, denitrifying bacteria, anaerobic ammonium oxidation bacteria and the like, and can degrade pollutants in water; the calcium peroxide oxygen-releasing agent particles can provide oxygen for the nitration reaction of microorganisms and the decomposition of organic matters, and can also properly adjust the surrounding pH value and enhance the activity of denitrifying bacteria and anaerobic ammonium oxidation bacteria; iron ions released by the pyrite enhance the denitrification effect, and the released sulfur ions can generate a symbiotic effect on the surface of the pyrite to attract the enrichment of anaerobic ammonium oxidation bacteria; the calcium carbonate can provide an alkaline environment for the nitration reaction to promote the nitration reaction; sodium alginate provides attachment space for microorganisms; the active carbon is used for adsorbing odor in the bottom mud and preventing the odor from dissipating. Therefore, the components in the water treatment filler have comprehensive effects, so that the high-efficiency treatment of the black and odorous water body is realized.
The black and odorous water pollution mainly contains pollutants such as ammonia nitrogen, phosphorus, organic matters and the like, and the specific treatment process comprises the following steps:
denitrification:
firstly, nitration reaction: the oxygen released by the calcium peroxide slow-release oxygen agent particles and the alkalinity provided by the calcium carbonate strengthen the nitrification of nitrifying bacteria, so that the ammonia nitrogen is nitrified into nitrite nitrogen and nitrate nitrogen.
② denitrification reaction: iron ions and sulfur ions released by the pyrite can enhance the activity of denitrifying flora, the pH value is increased due to the decomposition of calcium peroxide, the denitrification effect is enhanced, and the calcium carbonate provides alkalinity, so that nitrite nitrogen and nitrate nitrogen are converted into nitrogen to achieve the effect of denitrification.
③ anaerobic ammoxidation reaction: free sulfur ions on the surface of the pyrite are beneficial to attracting sulfur reducing bacteria and anaerobic ammonium oxidation bacteria to be symbiotically enriched on the surface of the pyrite, the alkalinity is provided by calcium carbonate, the pH value provided by the decomposition of calcium peroxide is increased, the activity of anaerobic ammonium oxidation bacteria is improved, and ammonia nitrogen in water and nitrite nitrogen generated by nitration reaction can be converted into nitrogen through anaerobic ammonium oxidation reaction so as to remove nitrogen.
And (3) dephosphorization:
the calcium peroxide slow-release oxygen agent releases calcium ions while decomposing, causes the pH value of the nearby environment to rise, triggers free phosphoric acid to be combined with the calcium ions to form phosphate precipitate, and cures phosphorus through the reaction to achieve the effect of removing phosphorus.
Removing organic matters:
oxygen released by the calcium peroxide slow-release oxygen agent particles promotes related microorganism species to remove organic matters, and one part of the organic matters is decomposed into micromolecular organic matters, so that the reaction requirement of denitrifying bacteria is met, and the denitrifying bacteria are ensured to have the required BOD environment.
In the embodiment of the present invention, the river sediment is mainly sandy sediment, and has a rich microbial community including nitrifying bacteria, denitrifying bacteria, anaerobic ammonium oxidation bacteria, and the like. The black and odorous water body is a water body with serious pollution, when the water body is polluted, the aerobic decomposition of organic matters leads the oxygen consumption rate in the water body to be greater than the reoxygenation rate, so that the water body is anoxic, the degradation of the organic matters is incomplete and the speed is reduced, the anaerobic microorganisms generate odorous substances such as hydrogen sulfide, amine, ammonia, mercaptan and the like in the degradation process, and black substances such as ferrous sulfide and the like are formed at the same time, so that the black and odorous water body is subjected to black and odorous.
In one embodiment of the invention, the flexible ecological bag for microorganisms is prepared by the following steps:
1) taking the polluted bottom mud out of the polluted river channel, and dehydrating to obtain river channel bottom mud;
2) mixing the river sediment treated in the step 1) with pyrite, activated carbon, calcium carbonate and sodium alginate, then adding calcium peroxide oxygen-releasing agent particles, and mixing to obtain the water treatment filler.
3) Filling the water treatment filler obtained in the step 2) into a flexible ecological bag to obtain the microbial flexible ecological bag.
Specifically, in the step 1), dewatering until the water content of the bottom mud of the river channel is lower than 80%. Specifically, the river sediment extraction should avoid water disturbance as much as possible, and the extracted sediment is dehydrated through sludge dehydration equipment, so that the water content of the sediment is lower than 80%.
Specifically, the step 3) further comprises the step of placing the water treatment filler obtained in the step 2) until the water content is lower than 45%, and then placing the filler into a flexible ecological bag. Therefore, the water treatment filler can be ensured to have enough density, and the ecological bank protection can be conveniently constructed to purify sewage. It is noted that the water content may also be referred to as water content, specifically the weight ratio of water to the total weight of the water treatment packing.
Preferably, the combination of the water treatment fillers and the mixing agents does not react with each other, and the water treatment fillers and the mixing agents are uniformly mixed by using a rotary stirring method. Preferably, in order to prevent the calcium peroxide from excessively reacting with the residual moisture in the bottom mud, the calcium peroxide slow-release oxygen particles are added finally.
In an embodiment of the present invention, the normal water level region revetment unit includes an ecological buffer tank 10; the ecological buffer tank 10 is arranged adjacent to the first microbial flexible ecological bag 2 at the highest position, and the top of the ecological buffer tank 10 is as high as the highest position of the first microbial flexible ecological bag 2;
the ecological buffer tank 10 is internally provided with a purified water wetland 4 and a water collecting underdrain 3, the purified water wetland 4 is positioned at the upper part of the water collecting underdrain 3, the bottom of the purified water wetland 4 is communicated with the water collecting underdrain through a water outlet, and the water collecting underdrain 3 is communicated with an original riparian zone 9 through a communicating pipe.
In the embodiment of the present invention, in the normal water level area bank protection unit:
the normal water level area further purifies pollutants in river water through the subsurface flow wetland and the surface flow wetland, effectively improves the water environment of the river, and can provide better landscape effect through planting wetland plants. In the flat period, the river water body can be further purified, and rainwater entering the river by radial flow can also be purified in rainy seasons.
In an embodiment of the present invention, the ecological buffer tank 10 is a concrete structure, and the clean water wetland 4 and the water collecting underdrain 3 are separated by a concrete pile plate. The water collecting underdrain 3 is mainly used for storing water, and wetland landscape plants can be planted on the surface soil layer of the purified water wetland 4.
In an embodiment of the present invention, a water storage module 11 is disposed inside the water collecting underdrain 3. The water storage module 11 can be used for storing water, but does not occupy space, and meanwhile, the landscape plants in the dry season can be guaranteed to obtain enough water sources. And drain valves are arranged at the bottom of the water collecting underdrain at intervals.
In an embodiment of the present invention, the height of the bottom of the water collecting underdrain 3 is equal to the height of the river water level in the dry season.
In an embodiment of the invention, the aperture of the water outlet arranged at the bottom of the purified water wetland 4 is preferably 2 cm-3 cm.
In one embodiment of the invention, the depth of the clean water wetland is 60-90 cm, and a drainage layer, a transition layer, a clean water packing layer and a soil layer (which can be used for planting wetland landscape plants) are sequentially arranged from bottom to top. The thickness of the water purification packing layer is about 50-100 cm, and the porosity of the packing is 30-50%; the transition layer is composed of 4-8 mm gravels, and the thickness of the transition layer is about 10-30 cm; the drainage layer is generally composed of gravels with the particle size of 8-16 mm, and the thickness of the drainage layer is 20-30 cm.
In an embodiment of the invention, the flood level area revetment unit comprises an ecological grassland 7 arranged on an original riparian zone 9, a diversion cross ditch 6 arranged at the bottom of the ecological grassland 7, and a percolation dam 5 arranged between the diversion cross ditch 6 and the clean water wetland 4.
In the embodiment of the present invention, in the flood area revetment unit:
can provide the ability of traveling flood when the river course water level is higher to have certain protecting against shock ability, can play the purification rainwater runoff in rainy season moreover, and reach the effect of holding to the rainwater stagnates.
As shown in fig. 2, specifically, a second microorganism flexible ecological bag 71 and a common ecological bag 72 planted with ornamental grass are sequentially laid on the ecological grassland from bottom to top; the second microorganism flexible ecological bag 71 occupies 1/2-1/3 of the area of the ecological grassland. It is noted that the normal ecological bag 72 may be formed by mixing humus and plain soil.
In the embodiment of the invention, the microbial flexible ecological bags and the common ecological bags planted with ornamental grass are sequentially paved on the ecological grassland from bottom to top, so that the erosion and collapse risks of flood to the slope can be prevented due to the stability of the ecological bags in the flood period of the river; in the open water period and the dry water period, the surface rainwater runoff can be purified by the internal microbial flexible ecological bag.
In a preferred embodiment of the invention, the percolation dam 5 is arranged on an original riparian zone, and the bottom of the percolation dam 5 is as high as the top of the ecological buffer tank 10; the bottom of the percolation dam 5 is higher than the bottom of the diversion transverse ditch 6. The transverse diversion trench mainly plays a role in collecting water. The infiltration dam is composed of permeable gabions and gravels wrapped by the permeable gabions, can intercept garbage in rainwater runoff, and guarantees cleanness of a river channel.
The invention also provides a construction method for strengthening the ecological bank protection of the black and odorous water body treated by the microorganisms, which specifically comprises the following steps:
the shore protection unit for the dry water level area is prepared by the following steps:
a1) leveling the original riparian zone 9, and constructing the dense pine pile support 8 of the original riparian zone 9;
a2) arranging a riprap toe guard 1 on the water-side of the pine pile support 8;
a3) the pine pile support 8 and the soil facing side of the riprap banket 1 are laminated along the original riparian zone 9 to form a first microorganism flexible ecological bag 2;
the normal water level area revetment unit is prepared by the following steps:
b1) paving an ecological buffer groove 10 by using concrete blocks on one side of the highest position of the microbial flexible ecological bag, wherein concrete piles of the ecological buffer groove 10 are required to be embedded into an original riparian zone 9;
b2) the upper part and the lower part of the ecological buffer tank 10 are respectively provided with a purified water wetland 4 and a water collecting underdrain 3, and the bottom of the water collecting underdrain 3 is connected with an original riparian zone 9 communicating pipe;
the flood area revetment unit is prepared by the following steps:
c1) arranging a percolation dam 5 on an original riparian zone 9, wherein the bottom of the percolation dam 5 is equal to the top of the ecological buffer tank 10 in height;
c2) excavating a water diversion transverse ditch 6 on one side of the percolation dam 5, wherein the bottom of the water diversion transverse ditch 6 is 10 cm lower than the percolation dam, and the width of the water diversion transverse ditch 6 can be 30 cm;
c3) and a second microorganism flexible ecological bag 71 and a common ecological bag 72 planted with ornamental grass are sequentially paved along the original riparian zone 9 at the inner side of the transverse diversion ditch 6 from bottom to top to form the ecological grassland 7.
Specifically, in step a2), the riprap having a large particle size is located below and the riprap having a small particle size is located above, and the riprap is connected to the closely-packed pine pile support 8 by mortar.
The present invention will be described in detail with reference to examples.
Example 1
A method for strengthening microorganism treatment of black and odorous water body by using ecological bank protection comprises a dry water level area bank protection unit, a normal water level area bank protection unit and a flood water level area bank protection unit;
the bank protection unit of the dry water level area comprises riprap banket 1, a first microorganism flexible ecological bag 2 and a pine pile support 8, wherein the riprap banket 1 is positioned on the waterside side, the pine pile support 8 is densely arranged and positioned on the inner side of the riprap banket 1, the first microorganism flexible ecological bag 2 is stacked along an original riparian zone 9 and positioned on the soil-facing side of the pine pile support 8 and the riprap banket 1, a water treatment filler is arranged in the microorganism flexible ecological bag, and the water treatment filler is composed of river bottom mud, calcium peroxide oxygen releasing agent particles, pyrite, activated carbon, calcium carbonate and sodium alginate according to the mass ratio of 100:10:7:1: 1;
wherein, the flexible ecological bag for microorganisms is prepared by the following steps:
1) taking the polluted bottom mud out of the polluted river channel, and dehydrating to obtain river channel bottom mud;
2) mixing the river sediment treated in the step 1) with pyrite, activated carbon, calcium carbonate and sodium alginate, and finally adding calcium peroxide oxygen-releasing agent particles to obtain a water treatment filler;
3) filling the water treatment filler obtained in the step 2) into a flexible ecological bag to obtain the microbial flexible ecological bag.
Example 2
The difference from the example 1 is that in the water treatment filler, the mass ratio of the riverway bottom mud, the calcium peroxide oxygen-releasing agent particles, the pyrite, the activated carbon, the calcium carbonate and the sodium alginate is 100:10:8:1.2:1.2: 1.2.
Comparative example 1
The difference from example 1 is that the water treatment filler is not added with river sediment.
Comparative example 2
The difference from example 1 is that no calcium peroxide oxygen-releasing agent particles are added to the water treatment filler.
Comparative example 3
The difference from example 1 is that no pyrite was added to the water treatment charge.
Comparative example 4
The difference from example 1 is that calcium carbonate is not added to the water-treated filler.
Comparative example 5
The difference from example 1 is that during the preparation of the water treatment filler, the riverway bottom mud, the pyrite, the activated carbon, the calcium carbonate, the sodium alginate and the calcium peroxide oxygen-releasing agent particles are simultaneously mixed.
Test example 1
And testing the purifying effect of the water treatment filler in the ecological bank protection on the black and odorous water body. The different water treatment fillers prepared in the example 1 and the comparative examples 1 to 5 are respectively filled in flexible ecological bags and are placed in an organic glass reactor filled with the same simulated black and odorous water body, the operation is carried out in an intermittent water inlet and outlet mode, the hydraulic retention time is 24 hours, the effluent water of the reactor is taken every day to detect the nitrogen, the phosphorus and the COD of the effluent water, and the average treatment effect in the experiment of 30 days is shown in the following table 1.
TABLE 1
| Total phosphorus removal% | Total nitrogen removal/%) | COD removal Rate/%) | |
| Example 1 | 90 | 80 | 80 |
| Comparative example 1 | 90 | 20 | 30 |
| Comparative example 2 | 30 | 10 | 20 |
| Comparative example 3 | 90 | 60 | 70 |
| Comparative example 4 | 90 | 70 | 80 |
| Comparative example 5 | 70 | 80 | 80 |
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An ecological revetment for strengthening microbial treatment of black and odorous water comprises a dry water level area revetment unit, a normal water level area revetment unit and a flood level area revetment unit;
the shore protection unit of the dry water area comprises riprap banket (1), a first microorganism flexible ecological bag (2) and a pine pile support (8), wherein the riprap banket (1) is located on the waterside side, the pine pile supports (8) are densely arranged and located on the inner side of the riprap banket (1), and the first microorganism flexible ecological bag (2) is stacked along an original river bank zone (9) and located on the soil-facing side of the pine pile support (8) and the riprap banket (1);
a water treatment filler is arranged in the first microorganism flexible ecological bag (2), and the water treatment filler is composed of riverway bottom mud, calcium peroxide oxygen releasing agent particles, pyrite, calcium carbonate, sodium alginate and active carbon; the mass ratio of the river sediment, the calcium peroxide oxygen releasing agent particles, the pyrite, the activated carbon, the calcium carbonate and the sodium alginate is 100 (8-12): 5-10): 0.8-1.2: (0.8-1.2): 0.8-1.2.
2. The ecological revetment according to claim 1,
the first microorganism flexible ecological bag (2) is prepared by the following steps:
1) taking the polluted bottom mud out of the polluted river channel, and dehydrating to obtain river channel bottom mud;
2) mixing the river sediment obtained in the step 1) with pyrite, activated carbon, calcium carbonate and sodium alginate, and then adding calcium peroxide oxygen-releasing agent particles to obtain a water treatment filler;
3) filling the water treatment filler obtained in the step 2) into a flexible ecological bag to obtain the microbial flexible ecological bag.
3. The ecological revetment according to claim 2,
in the step 1), dewatering until the water content of the bottom mud of the river channel is lower than 80%;
in the step 3), the method also comprises the step of placing the water treatment filler obtained in the step 2) until the water content is lower than 45%, and then placing the filler into a flexible ecological bag.
4. The ecological revetment according to claim 1,
the normal water level area revetment unit comprises an ecological buffer tank (10); the ecological buffer tank (10) is arranged adjacent to the first microorganism flexible ecological bag (2) at the highest position, and the top of the ecological buffer tank (10) is as high as the highest position of the first microorganism flexible ecological bag (2);
the ecological buffer tank (10) is internally provided with a water purification wetland (4) and a water collection underdrain (3), the water purification wetland (4) is positioned at the upper part of the water collection underdrain (3), the bottom of the water purification wetland (4) is communicated with the water collection underdrain (3) through a water outlet, and the water collection underdrain (3) is communicated with an original riparian zone (9) through a communicating pipe.
5. The ecological revetment according to claim 4,
and a water storage module (11) is arranged in the water collecting closed channel (3).
6. The ecological revetment according to claim 1,
the flood level area revetment unit comprises an ecological grassland (7) arranged on an original riparian zone (9), a diversion transverse ditch (6) arranged at the bottom of the ecological grassland (7) and a percolation dam (5) arranged between the diversion transverse ditch (6) and the purified water wetland (4).
7. The ecological revetment according to claim 6,
a second microorganism flexible ecological bag (71) and a common ecological bag (72) planted with ornamental grass are sequentially paved on the ecological grassland (7) from bottom to top; the second microorganism flexible ecological bag (71) occupies 1/2-1/3 of the area of the ecological grassland (7).
8. The ecological revetment according to claim 6,
the percolation dam (5) is arranged on the original riparian zone (9), and the bottom of the percolation dam (5) is as high as the top of the ecological buffer tank (10).
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| CN111977910B (en) * | 2020-08-27 | 2022-10-14 | 重庆大学 | Rainwater runoff treatment substrate and rainwater bioretention pool constructed by same |
| CN112663753B (en) * | 2020-12-09 | 2023-01-17 | 常州大学 | Black and odorous water body treatment device with sponge city function |
| CN113024025A (en) * | 2021-03-04 | 2021-06-25 | 中国科学院生态环境研究中心 | Ecological bank protection construction method for improving urban river water environment |
| CN114702202B (en) * | 2022-03-25 | 2024-04-23 | 中国城市建设研究院有限公司 | Microorganism water quality purifying filter tank |
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| CN102633369B (en) * | 2012-04-17 | 2013-05-22 | 西安建筑科技大学 | Method for repairing micro-polluted water body by utilizing bottom mud biological agent |
| CN103276696B (en) * | 2012-10-31 | 2016-06-15 | 重庆丹海生态环境实业有限公司 | A kind of underwater slope protection based on ecology bag and Ecological water treatment method |
| CN103669282B (en) * | 2013-12-26 | 2016-05-11 | 东北师范大学 | A kind of method that riverbed sludge is processed on the spot |
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| CN110485367A (en) * | 2019-08-05 | 2019-11-22 | 上海市政工程设计研究总院（集团）有限公司 | A kind of honeycomb type ecology bag ecological bank protection structure and its construction method |
| CN110981136A (en) * | 2019-12-30 | 2020-04-10 | 江南大学 | Method for in-situ remediation of river sediment by combination of powdered activated carbon and calcium peroxide |
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