CN111592181A - Comprehensive purification treatment method for municipal river - Google Patents
Comprehensive purification treatment method for municipal river Download PDFInfo
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- CN111592181A CN111592181A CN202010440093.5A CN202010440093A CN111592181A CN 111592181 A CN111592181 A CN 111592181A CN 202010440093 A CN202010440093 A CN 202010440093A CN 111592181 A CN111592181 A CN 111592181A
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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
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
- E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
- E02B15/06—Barriers therefor construed for applying processing agents or for collecting pollutants, e.g. absorbent
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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
- E02B3/02—Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
- E02B3/023—Removing sediments
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/285—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with drag buckets or scraper plates
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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
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2101/20—Heavy metals or heavy metal 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
- C02F2101/30—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
- 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
- C02F3/34—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
- C02F7/00—Aeration of stretches of water
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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
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
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Abstract
The invention relates to a municipal river comprehensive purification treatment method, which comprises the following steps: the method comprises the following steps: arranging a plurality of cofferdams in the river channel to divide the river channel into a plurality of dredging river sections; step two: from the upstream of the river channel, discharging the water body in the dredging river section into an adjacent dredging river section, and excavating and cleaning sludge in the river channel; step three: measuring the depth of the dredging river section after excavation and cleaning, and paving a solid soil layer at the bottom of the river channel; step four: an aeration pipe is arranged in the soil stabilization layer, and a plurality of aeration ports are arranged on the aeration pipe; step five: arranging a purification grid at a preset height from the soil stabilization layer; step six: removing the cofferdam positioned at the upstream to fill water into the dredging river section, and then laying an ecological floating bed at a preset position of the dredging river section; step seven: and repeating the first step to the sixth step until the dredging treatment of the whole river channel is finished. The treatment method has the advantages of high dredging effect, strong water body purification treatment capacity and good comprehensive treatment effect.
Description
Technical Field
The invention relates to the technical field of river channel treatment, in particular to a municipal river channel comprehensive purification treatment method.
Background
Municipal rivers are one of important components of urban landscapes and are important factors for constructing urban ecological systems, and the municipal rivers also play roles in providing water sources for cities, transporting conditions, preventing and draining floods, regulating climate and purifying environment. Because municipal river course width usually is not long and river velocity of flow is mild, people can produce simultaneously in the production life rubbish and discharge the river course in to pollute, silt is piled up can appear in municipal river course bottom surface after a period of time, can cause the river course to block up after a long time, river rising and quality of water worsen or even smelly phenomenon, consequently, need regularly carry out the desilting renovation to the river course, desilting renovation is usually only to carry out preliminary excavation clearance with silt at present, it is relatively weak to water purification treatment effect, quality of water is still relatively poor after the desilting.
Disclosure of Invention
In order to solve the technical problems, the invention provides a comprehensive purification treatment method for a municipal river, which has the function of comprehensively purifying and treating river sludge and water.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a comprehensive purification treatment method for municipal river channels comprises the following steps:
the method comprises the following steps: arranging a plurality of cofferdams in the river channel along the extending direction of the river channel to divide the river channel into a plurality of dredging river sections;
step two: from the upstream of the river channel, discharging the water body in the dredging river section into an adjacent dredging river section, and excavating and cleaning sludge in the river channel;
step three: measuring the depth of the dredging river section after excavation and cleaning, and paving a solid soil layer at the bottom of the river channel to adjust the river channel to a preset depth;
step four: an aeration pipe is arranged in the soil stabilization layer and is connected with an aerator, a plurality of aeration ports are arranged on the aeration pipe, and the aeration ports extend out of the surface of the soil stabilization layer;
step five: arranging a purification grid at a preset height away from the soil-fixing layer, wherein the purification grid is anchored on a river bank and is provided with a plurality of microorganism hanging materials;
step six: removing a cofferdam positioned at the upstream to fill water into the dredging river section, and then laying an ecological floating bed at a preset position of the dredging river section, wherein greening vegetation is planted on the ecological floating bed;
step seven: and repeating the first step to the sixth step until the dredging treatment of the whole river channel is finished.
The technical scheme is realized, the riverway is divided into a plurality of dredging river sections by building cofferdams, so that the riverway can be treated section by section, firstly, water in the most upstream dredging river section is discharged into the adjacent dredging river section, then, sludge in the dredging river section is excavated, cleaned and transported out, the depth of the riverway is measured after dredging is completed, so as to measure and calculate the thickness of a solid soil layer required to be arranged, then, the solid soil layer is filled in the riverway to reinforce and stabilize the bottom of the riverway, aeration pipes are arranged on the solid soil layer and are connected with an aerator and used for aerating the riverway periodically, supplementing oxygen to the water of the riverway, promoting the survival and propagation of microorganisms in the riverway and improving the water purification treatment capacity; anchoring a purification grid on a bank of a river channel to enable the purification grid to be suspended in the river channel, attaching microorganisms for water quality treatment on microorganism hanging materials in the purification grid to purify the water body of the river channel, improving the water quality of the river channel, removing a cofferdam positioned at the upstream, filling the water body at the upstream into the dredging river section again, placing a prefabricated ecological floating bed in the river channel, and facilitating construction and restoration of the ecology of the river channel through greening vegetation on the ecological floating bed, improving the greening capability and realizing comprehensive treatment of the water body of the river channel; and after the dredging river section is treated, discharging water in the next dredging river section into the adjacent dredging river section, treating the next dredging river section again, and repeating the treatment process to finish the treatment of the whole river channel.
As a preferable scheme of the present invention, the method for constructing a cofferdam specifically includes:
sequentially driving timber piles into the bottom of the river along the width direction of the river, wherein two groups of timber piles are arranged side by side, a landfill space is formed between the two groups of timber piles, and the distance between adjacent timber piles in the same group is 15-25 cm;
inserting water baffles into the side, close to the upstream, of each group of timber piles corresponding to the gap between adjacent timber piles, and arranging the water baffles corresponding to the two groups of timber piles in a staggered manner;
and stacking blocking sand bags in the landfill space, wherein the blocking sand bags are mutually occluded and the staggered joints are aligned.
Realize above-mentioned technical scheme, support the breakwater through the stake, the rethread blocks the sand bag and cuts off the river course, owing to block that mutual interlock between the sand bag piles up, the gap between the sand bag can be reduced as far as to the staggered joint paving, improves the water proof ability that blocks the sand bag, can restrict improvement stability to blocking the sand bag through two sets of stakes simultaneously, and because the breakwater dislocation set, the cooperation blocks that the sand bag makes the water proof ability in cofferdam stronger.
As a preferred scheme of the invention, when the sludge is excavated and cleaned: and excavating from the upper layer to the lower layer in layers by using an excavator in sequence along the width direction of the river channel, wherein the excavation depth of each shovel is 0.8-1m, and 1-1.5m is reserved at the position close to the river channel embankment for manual excavation.
Due to the effect of gravity, if the sludge is excavated from the bottom in the excavation process, the sludge above the sludge can collapse and the excavated part below the sludge is filled again, and the excavation from the upper layer to the lower layer in layers can avoid refilling the excavated part with the sludge, so that the excavation efficiency is improved; meanwhile, the distance of 1-1.5m reserved near the side slope can play a role in buffering, so that the bank is prevented from being damaged during mechanical operation, and the service life of the bank is prolonged.
As a preferable scheme of the invention, the soil fixing layer comprises a slag soil layer, a soft soil planting layer and a smooth bottom stone layer which are sequentially arranged from bottom to top, and a plurality of adsorption layers are arranged at intervals in the soft soil planting layer.
Realize above-mentioned technical scheme, make the river course bottom have sufficient intensity and hardness through the dregs layer, it can conveniently plant aquatic plant in the river course to set up the weak soil planting layer, make can be more steady durable bottom the river course, possess certain purification ability to the water simultaneously, and set up smooth bottom stone layer and can restrain aquatic plant's growth, reduce the complexity of river bottom topography, simultaneously through the adsorbed layer, carry out the absorption of certain degree to impurity in the river course, improve quality of water purification ability.
As a preferable scheme of the invention, the interval between adjacent aeration pipes is 15-20m, and the interval between adjacent aeration openings is 0.8-1 m.
As a preferable aspect of the present invention, the purification grill includes: the microorganism hanging material is evenly distributed in the installation frame, and microorganisms used for water quality treatment are attached to the microorganism hanging material.
By adopting the technical scheme, the microorganism hanging materials are distributed in an array manner, and the water quality purification treatment capacity is improved.
As a preferable scheme of the present invention, the fixed frame is connected with an anchoring rope, the other end of the anchoring rope is connected to the river bank, and the fixed frame is connected with a plurality of floating balls, and the buoyancy of the floating balls is substantially equal to the gravity of the purification grid.
Realize above-mentioned technical scheme, the buoyancy through the buoyancy ball offsets with the gravity of purifying the grid, makes the purification grid can keep the state of suspension, owing to receive the restriction of anchor rope simultaneously for the purification grid can float at certain extent, enlarges the purification area.
As a preferred scheme of the invention, the ecological floating bed is provided with a plurality of planting boxes, the greening vegetation is planted in the planting boxes, and the periphery of the ecological floating bed is provided with a shock absorption air cushion.
Realize above-mentioned technical scheme, reduce the collision with the river course in the ship that drives through setting up the shock attenuation air cushion, improve the security.
As a preferred scheme of the invention, intercepting tucks are arranged around the ecological floating bed.
According to the technical scheme, the garbage floating on the river channel can be intercepted through the intercepting string bag, and cleaning is convenient for cleaning personnel.
In conclusion, the invention has the following beneficial effects:
the embodiment of the invention provides a municipal river comprehensive purification treatment method, a river channel is divided into a plurality of dredging river sections by building cofferdams, so that the river channel can be treated section by section, firstly, water in the most upstream dredging river section is discharged into the adjacent dredging river section, then, sludge in the dredging river section is excavated, cleaned and transported out, the depth of the river channel is measured after dredging is completed, the thickness of a solid soil layer to be arranged is measured, then, the solid soil layer is filled in the river channel to reinforce and stabilize the bottom of the river channel, aeration pipes are arranged on the solid soil layer and are connected with an aerator, and the aerator is used for aerating the river channel periodically to supplement oxygen for the water body of the river channel, promote the survival and propagation of microorganisms in the river channel and improve the water purification treatment capacity; anchoring a purification grid on a bank of a river channel to enable the purification grid to be suspended in the river channel, attaching microorganisms for water quality treatment on microorganism hanging materials in the purification grid to purify the water body of the river channel, improving the water quality of the river channel, removing a cofferdam positioned at the upstream, filling the water body at the upstream into the dredging river section again, placing a prefabricated ecological floating bed in the river channel, and facilitating construction and restoration of the ecology of the river channel through greening vegetation on the ecological floating bed, improving the greening capability and realizing comprehensive treatment of the water body of the river channel; and after the dredging river section is treated, discharging water in the next dredging river section into the adjacent dredging river section, treating the next dredging river section again, and repeating the treatment process to finish the treatment of the whole river channel.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic construction diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a cofferdam in the embodiment of the invention.
Fig. 3 is a schematic structural view of a soil stabilization layer and an aeration pipe in the embodiment of the invention.
Fig. 4 is a schematic structural diagram of a purification grid in an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an ecological floating bed in the embodiment of the invention.
The corresponding part names indicated by the numbers and letters in the drawings:
1. cofferdam; 11. piling wood; 12. a water baffle; 13. blocking the sand bag; 2. soil layer fixing; 21. a slag soil layer; 22. a soft soil planting layer; 23. a smooth bottom stone layer; 24. an adsorption layer; 3. an aeration pipe; 31. an aeration opening; 4. a purification grid; 41. a fixed frame; 42. installing a frame; 43. hanging the microorganism; 44. anchoring the rope; 45. a floating ball; 5. an ecological floating bed; 51. planting boxes; 52. a shock-absorbing air cushion; 53. a net bag is intercepted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A comprehensive purification and treatment method for municipal river channels is shown in figures 1 to 5 and comprises the following steps:
the method comprises the following steps: a plurality of cofferdams 1 are arranged in the river channel along the extending direction of the river channel to divide the river channel into a plurality of dredging river sections.
The method for constructing the cofferdam 1 specifically comprises the following steps:
s101, driving timber piles 11 into the bottom of a river channel in sequence along the width direction of the river channel, wherein two groups of timber piles 11 are arranged side by side, a landfill space is formed between the two groups of timber piles 11, the width of the landfill space is 80-100cm, and the distance between every two adjacent timber piles 11 in the same group is 15-25 cm;
s102, inserting water baffles 12 into one side, close to the upstream, of each group of timber piles 11, corresponding to gaps between adjacent timber piles 11, and arranging the water baffles 12 corresponding to the two groups of timber piles 11 in a staggered mode, wherein in actual application, the two timber piles 11 and one water baffle 12 can be anchored together through iron nails to be used as an assembly, so that the construction process is more convenient;
s103, stacking the blocking sand bags 13 in the landfill space, blocking mutual occlusion and staggered joint alignment of the sand bags 13, making the blocking sand bags 13 by filling soil, soil and stone mixed slag soil or gravel in woven bags, wherein each blocking sand bag 13 is weighed above 30KG and piled flatly, and the fluctuation difference is not more than 20 cm.
Step two: and (3) from the upstream of the river channel, discharging the water body in the dredging river section into an adjacent dredging river section, and excavating and cleaning the sludge in the river channel.
When sludge excavation is cleaned: excavating from the upper layer to the lower layer in layers by using an excavator in sequence along the width direction of the river channel, wherein the excavation depth of each shovel is 0.8-1m, and 1-1.5m is reserved at the position close to the river channel embankment for manual excavation; under the action of gravity, if the sludge is excavated from the bottom in the excavation process, the sludge above the sludge can collapse and the excavated part below the sludge is refilled, and the sludge is excavated from the upper layer to the lower layer in a layered manner, so that the excavated part of the sludge can be prevented from being refilled, and the excavation efficiency is improved; meanwhile, the distance of 1-1.5m reserved near the side slope can play a role in buffering, so that the bank is prevented from being damaged during mechanical operation, and the service life of the bank is prolonged.
Step three: and measuring the depth of the dredging river section after excavation and cleaning, and paving a solid soil layer 2 at the bottom of the river channel to adjust the river channel to a preset depth.
The river channel depth measurement can be carried out by adopting an ultrasonic range finder, the solid soil layer 2 comprises a slag soil layer 21, a soft soil planting layer 22 and a smooth bottom stone layer 23 which are sequentially arranged from bottom to top, the smooth bottom stone layer 23 can be made of mellow river channel bottom stones, a plurality of adsorption layers 24 are arranged in the soft soil planting layer 22 at intervals, the adsorption layers 24 are arranged along the extending direction of the river channel, the width of each adsorption layer 24 is 30-50cm, and the interval between every two adjacent adsorption layers 24 is 2-2.5 m.
The adsorption layer 24 is composed of activated carbon or zeolite alone or in combination, the activated carbon has strong adsorption capacity and can adsorb impurities in water, the zeolite has the performances of adsorptivity, ion exchange property, catalysis, acid resistance, heat resistance and the like, and can be used as a water quality treating agent for treating polluted water.
Make the river course bottom have sufficient intensity and hardness through sediment layer 21, it can conveniently plant aquatic plant in the river course to set up soft soil planting layer 22, make can be more steady durable bottom the river course, possess certain purifying capacity to the water simultaneously, and set up smooth bottom stone layer 23 and can restrain aquatic plant's growth, reduce the complexity of river bottom topography, simultaneously through adsorbed layer 24, carry out the absorption of certain degree to impurity in the river course, improve quality of water purifying capacity.
Step four: aeration pipes 3 are distributed in the soil stabilization layer 2, the aeration pipes 3 are connected with an aerator, a plurality of aeration openings 31 are arranged on the aeration pipes 3, the aeration openings 31 extend out of the surface of the soil stabilization layer 2, the interval between every two adjacent aeration pipes 3 is 15-20m, and the interval between every two adjacent aeration openings 31 is 0.8-1 m.
Step five: and a purification grid 4 is arranged at a preset height from the soil stabilization layer 2, the purification grid 4 is anchored on the river bank, and a plurality of microorganism hanging materials 43 are arranged on the purification grid 4.
The purification grid 4 comprises: fixed frame 41 and a plurality of evenly distributed are at the installing frame 42 on fixed frame 41, and the microorganism is hung material 43 and is evenly laid in installing frame 42, and is attached to the microorganism that is used for carrying out water treatment on hanging material 43 to make microorganism hang material 43 be array distribution, improve water purification treatment ability, and be connected with anchor rope 44 on fixed frame 41, anchor rope 44's the other end is connected in the river bank. Meanwhile, a plurality of adsorption pieces are arranged on the microorganism hanging material 43 along the vertical direction, the adsorption pieces are formed by weaving biological carbon fibers and are connected on the microorganism hanging material 43 in series, and the adsorption pieces help to adsorb elements such as suspension, nitrogen and phosphorus in a water body, so that the water quality purification capacity is further improved
The fixed frame is connected with a plurality of floating balls 45, and the buoyancy of the floating balls 45 is basically equal to the gravity of the purification grating 4; the buoyancy of the buoyancy ball is offset with the gravity of the purification grid 4, so that the purification grid 4 can keep a suspended state, and meanwhile, the purification grid 4 can float in a certain range due to the limitation of the anchoring rope 44, so that the purification area is enlarged.
Step six: and (3) removing the cofferdam 1 positioned at the upstream to fill water into the dredging river section, and then laying an ecological floating bed 5 at a preset position of the dredging river section, wherein greening vegetation is planted on the ecological floating bed 5.
Step seven: and repeating the first step to the sixth step until the dredging treatment of the whole river channel is finished.
The method comprises the steps of dividing a river channel into a plurality of dredging river sections by building a cofferdam 1, treating the river channel section by section, discharging water in the most upstream dredging river section into the adjacent dredging river sections, excavating, cleaning and transporting sludge in the dredging river sections, measuring the depth of the river channel after dredging is completed to measure the thickness of a solid soil layer 2 to be arranged, filling the solid soil layer 2 into the river channel to reinforce and stabilize the bottom of the river channel, arranging an aeration pipe 3 on the solid soil layer 2, connecting the aeration pipe 3 with an aerator, aerating the river channel regularly, supplementing oxygen to the water of the river channel, promoting the survival and propagation of microorganisms in the river channel, and improving the water purification treatment capacity; then, the purification grid 4 is anchored on the bank of the river channel, so that the purification grid 4 is suspended in the river channel, microorganisms for water quality treatment are attached to the microorganism hanging materials 43 in the purification grid 4, the water body of the river channel is purified, the water quality of the river channel is improved, then the cofferdam 1 positioned at the upstream is dismantled, the water body at the upstream is filled into the dredging river section again, the prefabricated ecological floating bed 5 is placed in the river channel, the construction and restoration of the river channel ecology are facilitated through greening vegetation on the ecological floating bed 5, the greening capability is improved, and the comprehensive treatment of the water body of the river channel is realized; and after the dredging river section is treated, discharging water in the next dredging river section into the adjacent dredging river section, treating the next dredging river section again, and repeating the treatment process to finish the treatment of the whole river channel.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A municipal river comprehensive purification treatment method is characterized by comprising the following steps:
the method comprises the following steps: arranging a plurality of cofferdams in the river channel along the extending direction of the river channel to divide the river channel into a plurality of dredging river sections;
step two: from the upstream of the river channel, discharging the water body in the dredging river section into an adjacent dredging river section, and excavating and cleaning sludge in the river channel;
step three: measuring the depth of the dredging river section after excavation and cleaning, and paving a solid soil layer at the bottom of the river channel to adjust the river channel to a preset depth;
step four: an aeration pipe is arranged in the soil stabilization layer and is connected with an aerator, a plurality of aeration ports are arranged on the aeration pipe, and the aeration ports extend out of the surface of the soil stabilization layer;
step five: arranging a purification grid at a preset height away from the soil-fixing layer, wherein the purification grid is anchored on a river bank and is provided with a plurality of microorganism hanging materials;
step six: removing a cofferdam positioned at the upstream to fill water into the dredging river section, and then laying an ecological floating bed at a preset position of the dredging river section, wherein greening vegetation is planted on the ecological floating bed;
step seven: and repeating the first step to the sixth step until the dredging treatment of the whole river channel is finished.
2. The municipal river comprehensive purification and treatment method according to claim 1, wherein the cofferdam construction method specifically comprises:
sequentially driving timber piles into the bottom of the river along the width direction of the river, wherein two groups of timber piles are arranged side by side, a landfill space is formed between the two groups of timber piles, and the distance between adjacent timber piles in the same group is 15-25 cm;
inserting water baffles into the side, close to the upstream, of each group of timber piles corresponding to the gap between adjacent timber piles, and arranging the water baffles corresponding to the two groups of timber piles in a staggered manner;
and stacking blocking sand bags in the landfill space, wherein the blocking sand bags are mutually occluded and the staggered joints are aligned.
3. The comprehensive municipal river purification and treatment method according to claim 2, wherein during sludge excavation and cleaning: and excavating from the upper layer to the lower layer in layers by using an excavator in sequence along the width direction of the river channel, wherein the excavation depth of each shovel is 0.8-1m, and 1-1.5m is reserved at the position close to the river channel embankment for manual excavation.
4. The comprehensive purification and treatment method for the municipal river according to claim 2 or 3, wherein the soil consolidation layer comprises a slag soil layer, a soft soil planting layer and a smooth bottom stone layer which are sequentially arranged from bottom to top, and a plurality of adsorption layers are arranged at intervals in the soft soil planting layer.
5. The comprehensive municipal river purification and treatment method according to claim 4, wherein the distance between adjacent aeration pipes is 15-20m, and the distance between adjacent aeration openings is 0.8-1 m.
6. The municipal river comprehensive purification treatment method according to claim 1, wherein the purification grid comprises: the microorganism hanging material is evenly distributed in the installation frame, and microorganisms used for water quality treatment are attached to the microorganism hanging material.
7. The method for comprehensive purification and treatment of the municipal river according to claim 6, wherein the fixed frame is connected with an anchoring rope, the other end of the anchoring rope is connected with a river bank, the fixed frame is connected with a plurality of floating balls, and the buoyancy of the floating balls is substantially equal to the gravity of the purification grid.
8. The municipal river comprehensive purification and treatment method according to claim 1, wherein the ecological floating bed is provided with a plurality of planting boxes, the greening vegetation is planted in the planting boxes, and the periphery of the ecological floating bed is provided with a shock absorption air cushion.
9. The comprehensive purification and treatment method for the municipal river according to claim 8, wherein an intercepting tuck net is arranged around the ecological floating bed.
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Application publication date: 20200828 |