CN111807634A - Technical method for treating water pollution of urban rivers - Google Patents
Technical method for treating water pollution of urban rivers Download PDFInfo
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- CN111807634A CN111807634A CN202010710433.1A CN202010710433A CN111807634A CN 111807634 A CN111807634 A CN 111807634A CN 202010710433 A CN202010710433 A CN 202010710433A CN 111807634 A CN111807634 A CN 111807634A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003911 water pollution Methods 0.000 title claims description 7
- 239000010865 sewage Substances 0.000 claims abstract description 146
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000126 substance Substances 0.000 claims abstract description 29
- 239000013049 sediment Substances 0.000 claims abstract description 21
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims abstract description 13
- 231100000719 pollutant Toxicity 0.000 claims abstract description 13
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 238000003903 river water pollution Methods 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 239000003463 adsorbent Substances 0.000 claims abstract description 5
- 238000005273 aeration Methods 0.000 claims description 25
- 241000894006 Bacteria Species 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 11
- 239000008394 flocculating agent Substances 0.000 claims description 10
- 230000009286 beneficial effect Effects 0.000 claims description 9
- 239000000645 desinfectant Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 230000001376 precipitating effect Effects 0.000 claims description 8
- 239000010802 sludge Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 238000000354 decomposition reaction Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 4
- 239000011790 ferrous sulphate Substances 0.000 claims description 4
- 229910001385 heavy metal Inorganic materials 0.000 claims description 4
- 150000004679 hydroxides Chemical class 0.000 claims description 4
- 230000000415 inactivating effect Effects 0.000 claims description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 4
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 4
- 244000005700 microbiome Species 0.000 claims description 4
- 230000001546 nitrifying effect Effects 0.000 claims description 4
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000002957 persistent organic pollutant Substances 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 150000004760 silicates Chemical class 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 claims description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 3
- 239000007844 bleaching agent Substances 0.000 claims description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8833—Floating installations
- E02F3/885—Floating installations self propelled, e.g. ship
-
- 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
-
- 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
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/20—Prevention of biofouling
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a technical method for treating urban river water pollution, which relates to the technical field of sewage treatment and comprises the following steps: s1, introducing river sewage in the city into a sewage pool by using a city sewage pipe network; s2, dredging the bottoms of rivers in cities, and reducing the release of pollutants in the sediment to a water body in a sediment dredging mode; s3, under the action of a flow guide device, sewage introduced into the sewage tank is treated by a sewage blocking net to remove suspended substances, large-sized substances and garbage in the sewage; s4, filtering the particle magazines in the sewage through a filter screen layer after the sewage passes through the sewage blocking net, and removing harmful substances in the sewage through an activated carbon adsorbent. The technical method for treating the urban river water pollution has the advantages of low implementation difficulty and low implementation cost, is convenient for actual operation and use, ensures high water quality after treatment through multi-channel treatment of the water quality, and ensures good water quality of the urban river.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a technical method for treating urban river water pollution.
Background
The urban social-economic system depends on various functions provided by urban rivers, such as receiving function, ecological function, landscape and beautifying function, and the like, so that the healthy urban water environment is an important guarantee for urban sustainable development. However, with the rapid development of the economy of China and the continuous improvement of the living standard of people, the discharge amount of industrial and agricultural wastewater and domestic sewage is increased year by year, so that urban rivers are seriously polluted.
Along with the increase of urban population, the discharge amount of urban domestic sewage increases year by year, for example, the discharge amount of the domestic sewage in 2010 of Anhui province is 11.373 hundred million, and the discharge amount of the domestic sewage in 2011 is 17.238 million, which increases 51.57%, and the discharge amount of the domestic sewage COD accounts for 30.08% of the total discharge amount. The sewage treatment rate is not synchronously increased, so that a large amount of domestic sewage is discharged into urban rivers, the water quality of the urban rivers is seriously influenced, the ecological environment of the cities is destroyed, and the health of residents is threatened.
In the prior art, most of the methods of bottom sediment dredging are adopted for water quality restoration and are matched with methods of sewage interception and diversion and water diversion and sewage flushing, but the implementation difficulty is high, the number of involved departments is large, the cost is high, and the problem of water quality pollution cannot be fundamentally solved.
Therefore, a technical method for treating the water pollution of the urban rivers is provided to solve the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a technical method for treating urban river water pollution, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a technical method for treating water pollution of urban rivers comprises the following steps:
s1, introducing river sewage in the city into a sewage pool by using a city sewage pipe network;
s2, dredging the bottoms of rivers in cities, and reducing the release of pollutants in the sediment to a water body in a sediment dredging mode;
s3, under the action of a flow guide device, sewage introduced into the sewage tank is treated by a sewage blocking net to remove suspended substances, large-sized substances and garbage in the sewage;
s4, filtering the particle magazines in the sewage through a filter screen layer after the sewage passes through a sewage blocking screen, removing harmful substances in the sewage through an active carbon adsorbent, removing oil stains in the sewage through adsorption fluff, and improving the clarity of a water body;
s5, introducing the sewage into an aeration tank, wherein an aeration pipe in the aeration tank is in full contact with the sewage for mixing, and reducing substances in the sewage are oxidized by aeration treatment, so that the dissolved oxygen content in the sewage is increased, and the transparency and the water quality of the water are provided;
s6, adding alkaline substances into the sewage, and adjusting the pH value of the sewage to enable heavy metals to form insoluble precipitates such as silicates, carbonates, hydroxides and the like;
s7, adding a flocculating agent into the sewage, starting a stirring device to stir, and mixing the sewage and the flocculating agent to enable particles in the sewage to be coagulated and separated from the sewage;
s8, precipitating the sewage through the grating fence, and precipitating sludge and flocculated particles in the sewage at the bottom of the precipitation chamber;
s9, adding a disinfectant into the sewage, inactivating bacteria in the sewage, and refluxing after reaching a discharge standard;
and S10, periodically detecting the water quality of the river back to ensure that the water quality of the river in the city can be guaranteed.
In S2, the cutter suction dredger is used to suck the surface sediments directly from the pipeline under the action of the dredge pump and to transport them to the yard on land in a long distance, so as to permanently remove the pollutants in the sediment and treat the sludge generated during dredging process, thereby preventing the generation of serious secondary pollution.
Further optimize this technical scheme, in S4, the filter screen layer can be placed in the slope, is convenient for collect the bottom in the filter screen with the suspended material that gets off, bold material and rubbish of filtering, makes things convenient for the staff follow-up to carry out purification treatment to the filter screen.
Further optimizing the technical scheme, in S4, a biological release bag may be further disposed on one side of the filter mesh layer, and the biological release bag may form a part of the region for microorganism enrichment, so as to accelerate decomposition of pollutants in the sewage.
Further optimize this technical scheme, in S5, when sewage carries out the aeration, can start agitated vessel and accelerate aeration speed and aeration quality for sewage and air fully contact, ensure the oxidative decomposition effect of water, make the organic pollutant in the sewage obtain the degradation.
In the step S5, a plurality of beneficial bacteria groups may be added while the sewage is aerated, wherein the beneficial bacteria groups include at least one of nitrifying bacteria, denitrifying bacteria, and sulfide bacteria, or a combination of at least two of the above bacteria.
In the step S7, the flocculating agent may be ferrous sulfate reagent.
In S9, the disinfectant may be liquid chlorine or bleaching powder.
Compared with the prior art, the invention provides a technical method for treating urban river water pollution, which has the following beneficial effects:
the technical method for treating the urban river water pollution is low in implementation difficulty and low in implementation cost, and is convenient for actual operation and use.
Drawings
FIG. 1 is a schematic flow chart of a technical method for treating urban river water pollution provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
The first embodiment is as follows:
referring to fig. 1, a technical method for treating water pollution of urban rivers includes the following steps:
s1, introducing river sewage in the city into a sewage pool by using a city sewage pipe network;
s2, dredging the bottoms of rivers in cities, and reducing the release of pollutants in the sediment to a water body in a sediment dredging mode;
s3, under the action of a flow guide device, sewage introduced into the sewage tank is treated by a sewage blocking net to remove suspended substances, large-sized substances and garbage in the sewage;
s4, filtering the particle magazines in the sewage through a filter screen layer after the sewage passes through a sewage blocking screen, removing harmful substances in the sewage through an active carbon adsorbent, removing oil stains in the sewage through adsorption fluff, and improving the clarity of a water body;
s5, introducing the sewage into an aeration tank, wherein an aeration pipe in the aeration tank is in full contact with the sewage for mixing, and reducing substances in the sewage are oxidized by aeration treatment, so that the dissolved oxygen content in the sewage is increased, and the transparency and the water quality of the water are provided;
s6, adding alkaline substances into the sewage, and adjusting the pH value of the sewage to enable heavy metals to form insoluble precipitates such as silicates, carbonates, hydroxides and the like;
s7, adding a flocculating agent into the sewage, starting a stirring device to stir, and mixing the sewage and the flocculating agent to enable particles in the sewage to be coagulated and separated from the sewage;
s8, precipitating the sewage through the grating fence, and precipitating sludge and flocculated particles in the sewage at the bottom of the precipitation chamber;
s9, adding a disinfectant into the sewage, inactivating bacteria in the sewage, and refluxing after reaching a discharge standard;
and S10, periodically detecting the water quality of the river back to ensure that the water quality of the river in the city can be guaranteed.
As a specific implementation manner of this embodiment, in S2, the cutter suction dredger is used to suck up the surface sediment directly from the pipeline by the mud pump and to transport the sediment to the storage yard on land for a long distance, so as to permanently remove the pollutants in the sediment and treat the sludge generated during the dredging process to prevent the generation of serious secondary pollution.
As a specific implementation manner of this embodiment, in S4, the filter screen layer may be disposed obliquely, so that suspended substances, large substances, and garbage filtered off are collected at the bottom of the filter screen, and a worker can perform subsequent purification treatment on the filter screen conveniently.
As a specific implementation manner of this embodiment, in S4, a biological release bag may be further disposed on one side of the filter mesh layer, and the biological release bag may form a part of the region for microorganism enrichment, so as to accelerate the decomposition of pollutants in the sewage.
As a specific implementation manner of this embodiment, in S5, the stirring device may be activated to accelerate the aeration rate and the aeration quality while the sewage is aerated, so that the sewage is fully contacted with the air, the oxidative decomposition effect of water is ensured, and the organic pollutants in the sewage are degraded.
As a specific implementation manner of this embodiment, in S5, a plurality of beneficial bacteria groups may be added while the sewage is aerated, and the beneficial bacteria groups include at least one of nitrifying bacteria, denitrifying bacteria, and sulfide bacteria.
As a specific implementation manner of this embodiment, in S7, the flocculant may be ferrous sulfate reagent.
As a specific implementation manner of this embodiment, in S9, the disinfectant may be liquid chlorine.
Example two:
a technical method for treating water pollution of urban rivers comprises the following steps:
s1, introducing river sewage in the city into a sewage pool by using a city sewage pipe network;
s2, dredging the bottoms of rivers in cities, and reducing the release of pollutants in the sediment to a water body in a sediment dredging mode;
s3, under the action of a flow guide device, sewage introduced into the sewage tank is treated by a sewage blocking net to remove suspended substances, large-sized substances and garbage in the sewage;
s4, filtering the particle magazines in the sewage through a filter screen layer after the sewage passes through a sewage blocking screen, removing harmful substances in the sewage through an active carbon adsorbent, removing oil stains in the sewage through adsorption fluff, and improving the clarity of a water body;
s5, introducing the sewage into an aeration tank, wherein an aeration pipe in the aeration tank is in full contact with the sewage for mixing, and reducing substances in the sewage are oxidized by aeration treatment, so that the dissolved oxygen content in the sewage is increased, and the transparency and the water quality of the water are provided;
s6, adding alkaline substances into the sewage, and adjusting the pH value of the sewage to enable heavy metals to form insoluble precipitates such as silicates, carbonates, hydroxides and the like;
s7, adding a flocculating agent into the sewage, starting a stirring device to stir, and mixing the sewage and the flocculating agent to enable particles in the sewage to be coagulated and separated from the sewage;
s8, precipitating the sewage through the grating fence, and precipitating sludge and flocculated particles in the sewage at the bottom of the precipitation chamber;
s9, adding a disinfectant into the sewage, inactivating bacteria in the sewage, and refluxing after reaching a discharge standard;
and S10, periodically detecting the water quality of the river back to ensure that the water quality of the river in the city can be guaranteed.
As a specific implementation manner of this embodiment, in S2, the cutter suction dredger is used to suck up the surface sediment directly from the pipeline by the mud pump and to transport the sediment to the storage yard on land for a long distance, so as to permanently remove the pollutants in the sediment and treat the sludge generated during the dredging process to prevent the generation of serious secondary pollution.
As a specific implementation manner of this embodiment, in S4, the filter screen layer may be disposed obliquely, so that suspended substances, large substances, and garbage filtered off are collected at the bottom of the filter screen, and a worker can perform subsequent purification treatment on the filter screen conveniently.
As a specific implementation manner of this embodiment, in S4, a biological release bag may be further disposed on one side of the filter mesh layer, and the biological release bag may form a part of the region for microorganism enrichment, so as to accelerate the decomposition of pollutants in the sewage.
As a specific implementation manner of this embodiment, in S5, the stirring device may be activated to accelerate the aeration rate and the aeration quality while the sewage is aerated, so that the sewage is fully contacted with the air, the oxidative decomposition effect of water is ensured, and the organic pollutants in the sewage are degraded.
As a specific embodiment of this embodiment, in S5, a plurality of beneficial bacteria groups including at least a combination of two of the above-mentioned bacteria including nitrifying bacteria, denitrifying bacteria, and sulfide bacteria may be added while the sewage is aerated.
As a specific implementation manner of this embodiment, in S7, the flocculant may be ferrous sulfate reagent.
As a specific implementation manner of this embodiment, in S9, the disinfectant may be bleaching powder.
The invention has the beneficial effects that: the technical method for treating the urban river water pollution is low in implementation difficulty and low in implementation cost, and is convenient for actual operation and use.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A technical method for treating urban river water pollution is characterized by comprising the following steps:
s1, introducing river sewage in the city into a sewage pool by using a city sewage pipe network;
s2, dredging the bottoms of rivers in cities, and reducing the release of pollutants in the sediment to a water body in a sediment dredging mode;
s3, under the action of a flow guide device, sewage introduced into the sewage tank is treated by a sewage blocking net to remove suspended substances, large-sized substances and garbage in the sewage;
s4, filtering the particle magazines in the sewage through a filter screen layer after the sewage passes through a sewage blocking screen, removing harmful substances in the sewage through an active carbon adsorbent, removing oil stains in the sewage through adsorption fluff, and improving the clarity of a water body;
s5, introducing the sewage into an aeration tank, wherein an aeration pipe in the aeration tank is in full contact with the sewage for mixing, and reducing substances in the sewage are oxidized by aeration treatment, so that the dissolved oxygen content in the sewage is increased, and the transparency and the water quality of the water are provided;
s6, adding alkaline substances into the sewage, and adjusting the pH value of the sewage to enable heavy metals to form insoluble precipitates such as silicates, carbonates, hydroxides and the like;
s7, adding a flocculating agent into the sewage, starting a stirring device to stir, and mixing the sewage and the flocculating agent to enable particles in the sewage to be coagulated and separated from the sewage;
s8, precipitating the sewage through the grating fence, and precipitating sludge and flocculated particles in the sewage at the bottom of the precipitation chamber;
s9, adding a disinfectant into the sewage, inactivating bacteria in the sewage, and refluxing after reaching a discharge standard;
and S10, periodically detecting the water quality of the river back to ensure that the water quality of the river in the city can be guaranteed.
2. The method as claimed in claim 1, wherein the step S2, the surface sediment is sucked up by the suction dredger directly through the pipe and is transported to the yard on land at a long distance, the pollutant in the bottom sediment can be permanently removed, and the sludge generated during the dredging process can be treated to prevent the serious secondary pollution.
3. The technical method for treating water pollution of urban rivers according to claim 1, wherein in S4, the filter screen layer can be placed obliquely, so that suspended substances, large substances and garbage filtered off can be collected at the bottom of the filter screen, and workers can clean the filter screen later.
4. The method as claimed in claim 1, wherein a bio-releasing bag is further provided at one side of the filter screen layer in S4, and a part of the area is enriched with microorganisms through the bio-releasing bag, so as to accelerate the decomposition of pollutants in the sewage.
5. The method of claim 1, wherein in step S5, the aeration rate and the aeration quality are increased by starting the stirring device while the sewage is aerated, so that the sewage is fully contacted with the air, the oxidative decomposition effect of water is ensured, and the organic pollutants in the sewage are degraded.
6. The method as claimed in claim 1, wherein in S5, sewage is aerated and simultaneously with adding beneficial flora, wherein the beneficial flora comprises at least one of nitrifying bacteria, denitrifying bacteria and sulfurous bacteria or a combination of at least two of the above.
7. The method as claimed in claim 1, wherein in S7, the flocculating agent is ferrous sulfate reagent.
8. The method as claimed in claim 1, wherein the disinfectant in S9 is liquid chlorine or bleaching powder.
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| CN202010710433.1A CN111807634A (en) | 2020-07-22 | 2020-07-22 | Technical method for treating water pollution of urban rivers |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2707621B1 (en) * | 1993-07-12 | 1995-10-20 | Omnium Traitement Valorisa | Process and installation for purifying water with denitrifying physico-chemical sludge. |
| CN105906150A (en) * | 2016-06-06 | 2016-08-31 | 李丹丹 | Sewage treatment system and technology for river ways in city |
| CN107827311A (en) * | 2017-10-20 | 2018-03-23 | 南京博威环保科技有限责任公司 | Pollution administration water remediation water ecosystem quaternity in-site comprehensive governing system and its construction method |
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Patent Citations (3)
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Application publication date: 20201023 |