CN111186955A - Method for treating black and odorous water in cities and towns - Google Patents
Method for treating black and odorous water in cities and towns Download PDFInfo
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- CN111186955A CN111186955A CN202010022186.6A CN202010022186A CN111186955A CN 111186955 A CN111186955 A CN 111186955A CN 202010022186 A CN202010022186 A CN 202010022186A CN 111186955 A CN111186955 A CN 111186955A
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- 238000000034 method Methods 0.000 title claims abstract description 47
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- 239000000701 coagulant Substances 0.000 claims abstract description 61
- 239000010865 sewage Substances 0.000 claims abstract description 45
- 238000005345 coagulation Methods 0.000 claims abstract description 24
- 230000015271 coagulation Effects 0.000 claims abstract description 24
- 238000010992 reflux Methods 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
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- 238000004062 sedimentation Methods 0.000 claims description 28
- 238000006213 oxygenation reaction Methods 0.000 claims description 27
- 238000005273 aeration Methods 0.000 claims description 24
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- 238000006243 chemical reaction Methods 0.000 claims description 8
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- 230000000813 microbial effect Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 5
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- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 4
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- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 1
- 241000186361 Actinobacteria <class> Species 0.000 description 1
- FCYKAQOGGFGCMD-UHFFFAOYSA-N Fulvic acid Natural products O1C2=CC(O)=C(O)C(C(O)=O)=C2C(=O)C2=C1CC(C)(O)OC2 FCYKAQOGGFGCMD-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
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- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000006481 deamination reaction Methods 0.000 description 1
- 238000006114 decarboxylation reaction Methods 0.000 description 1
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- 229940095100 fulvic acid Drugs 0.000 description 1
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- 150000003573 thiols Chemical class 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological 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
- C02F1/001—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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
- C02F2303/02—Odour removal or prevention of malodour
-
- 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
Abstract
A method for treating black and odorous water in cities and towns comprises the steps of removing large-particle solid suspended matters in water by a physical filtering means, adding a coagulant, adding a baffle plate, enabling sewage to be fully mixed and reacted with the coagulant in a water inlet tank, enabling rivers to be precipitated in the flowing process, erecting an inclined pipe in a precipitation area, improving water flow tissues, enhancing the efficiency of a precipitation tank by utilizing a laminar flow principle, separating upper clear water, lower turbid water and bottom sludge, performing oxygen enrichment treatment on the upper clear water and then refluxing to the cities and towns, discharging the bottom sludge into a sludge tank, introducing the lower turbid water into a secondary treatment tank, further performing ionized ion group coagulation treatment, performing oxygen enrichment treatment on the precipitated water and then refluxing to the cities and towns, discharging the precipitated sludge into the sludge tank, and performing drying treatment after landfill or incineration treatment. The method carries out secondary treatment on the sewage, improves the treatment speed, reduces the cost, reduces the damage to aquatic organisms, has no secondary pollution, and can effectively recover the self-purification function of the water body.
Description
Technical Field
The invention belongs to the technical field of water ecological restoration, and particularly relates to a method for treating urban black and odorous water.
Background
The urban black and odorous water body refers to a water body which obviously changes color (usually black or blackish) due to pollution and emits unpleasant odor in urban riverways.
The blackening of the water body is mainly caused by the fact that insoluble substances and organic compounds in the water body react under the participation of anaerobic microorganisms to generate FeS and other black sediments. The stink of the water body has the following reasons: 1) a large amount of organic matters are decomposed under the action of anaerobic bacteria, and intermediate products and final products of the organic matters contain a series of odorous substances such as hydrogen sulfide, ammonia, mercaptan and the like; 2) humic acid and fulvic acid can generate amino acid and a large amount of free ammonia through hydrolysis, deamination reaction, decarboxylation acid reaction or bacterial decomposition reaction can further occur in water, and a large amount of free ammonia, amines with considerable odor, hydrogen sulfide and thiol substances with special odor are preferably generated; 3) under anaerobic condition, the anaerobic actinomycetes can secrete geosmin and isotrichol, the olfactory threshold of the geosmin and isotrichol is between 0.05 and 0.1 mu g/L, and strong odor effect can be caused by extremely low concentration.
At present, the treatment method of the urban black and odorous water body mainly comprises the steps of external source blocking, internal source control, ecological restoration, hydrodynamic improvement, water quality purification and the like. Exogenous blocking: pollution source engineering treatment and other pollution interception measures are taken on a flow field scale, pollution load entering a river is greatly reduced, and the method is a primary measure for eliminating black and odorous problems, but the method is large in engineering and wide in related range, can be implemented by using material resources and financial resources of the whole city or even the country, and needs other treatment technologies to prevent black and odorous water from forming subsequently; endogenous control: solid pollutants such as sediment, garbage, biological residues and the like in water are removed by means of dredging, salvaging and the like, and the control of endogenous pollution is realized by utilizing hydraulic engineering, so that the treatment process of the black and odorous water body can be accelerated, but the engineering investment is large, the problem of formation of the urban black and odorous water body cannot be solved for a long time, and the method can only be used as an auxiliary method for treating the black and odorous water body; ecological restoration: the method eliminates the soluble pollutants in the water body by measures of ecological restoration and biological purification, but has slow effect, particularly has extremely unsatisfactory treatment effect on urban black and odorous water with more suspended matters, needs a large land space or water body space for implementation, has centralized urban population and limited land resources, and is not beneficial to the implementation of the method; improving the hydrodynamic force: clean water is supplemented into the black and odorous water body in cities and towns, the water body fluidity is increased, and pollutants are diluted, so that the method is mostly only used as a temporary treatment measure, and is difficult to implement especially in cities with short water resources; water purification: the method has the advantages that the iron salt coagulant and the aluminum salt coagulant are added into the urban black and odorous water body to promote the precipitation of suspended matters, the method is quick in effect and high in efficiency, but a single chemical treatment method cannot completely purify the black and odorous water body, a large amount of chemical substances are required to be added in the treatment process, secondary pollution is easily caused, and the black and odorous water body cannot be fundamentally purified.
Patent document (CN106630310A) discloses a method for treating urban black and odorous water, which purifies and aerates urban black and odorous water by ionized ion cluster coagulation technology and specific aeration technology, and can effectively recover the self-purification function of water, and has the advantages of small floor area of equipment, no secondary pollution and no need of supplementing live water. However, the method still has some defects, such as long treatment time, low treatment efficiency, high cost, incapability of treating a large amount of river water and difficulty in achieving treatment effect, and the method has great damage to organisms in the water body, damages biological diversity in the water body and influences ecological restoration of the water body.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for treating urban black and odorous water, which comprises the steps of removing large-particle solid suspended matters in water by a physical filtration means, adding a coagulant, adding a baffle plate, fully mixing and reacting sewage and the coagulant in a water inlet tank to precipitate a river in the flowing process, and an inclined pipe is erected in the sedimentation area to improve the water flow organization, the efficiency of the sedimentation tank is enhanced by utilizing the laminar flow principle, the upper clear water, the lower turbid water and the bottom sludge are separated, the upper clear water is subjected to oxygenation treatment and then flows back to the urban river, the bottom sludge is discharged into the sludge tank, introducing the lower layer turbid water into a secondary treatment tank, further carrying out ionized ion group coagulation treatment, and (3) carrying out oxygenation treatment on the precipitated effluent, then refluxing the water to the urban river, discharging the precipitated sludge into a sludge tank, and carrying out landfill or incineration treatment after drying. The method carries out secondary treatment on the sewage, improves the treatment speed, reduces the cost, reduces the damage to aquatic organisms, has no secondary pollution, and can effectively recover the self-purification function of the water body.
In order to achieve the purpose, the invention adopts the technical scheme that: a method for treating urban black and odorous water comprises the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid;
3) coagulation and separation treatment: adding a coagulant into the water filtered by the mechanical grating, introducing the sewage into a settling channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the settling channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge pond, and introducing the lower muddy water into a secondary treatment pond;
4) coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank;
5) sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
The front end of the settling channel is provided with a baffle plate, and the baffle plate enables the sewage to be fully mixed and reacted with the coagulant in the water inlet tank; an inclined pipe is arranged at the rear end of the settling channel; the length of the settling channel is 100-500 m.
The oxygenation treatment in the step 3) is implemented by utilizing a micropore ozone aeration treatment tank to oxygenate.
The specific oxygen increasing treatment is as follows: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
The drainage in the step 1) is carried out, wherein the ratio of the drainage water volume to the urban black and odorous water volume is 1: 1 to 10.
The mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between grating bars is 3-20 mm.
The coagulant in the step 3) is a mixture of polyacrylamide and at least one of polyaluminum chloride, polyaluminum ferric chloride and aluminum sulfate.
The coagulant in the step 3), wherein the addition amount of the coagulant is F coagulant multiplied by Q water, wherein F coagulant is 20+ BZ turbidity, B is coefficient and is 0.5-1.5, Z turbidity is the turbidity of the water discharged by a mechanical grating, and the unit of the F coagulant is g/m3Q water is water flow with unit of m3H; the amount of the polyacrylamide in the step 3) is 1-20 g/m3。
The voltage U1 of the ionized ion cluster processing device in the step 4) is 1000+ C1Q water, wherein U1 is less than or equal to 10000V, and C1 is a coefficient with the value of 0.5-10 Vh/m3Q water is water flow with unit of m3H; the ion group in the ionized ion group processing device in the step 4) is one or the combination of any more of silicon ions, boron ions and aluminum ions; the voltage U2 of the ion bar processing system in the step 4) is 5000+ C2Q water, wherein U2 is not more than 20000V, C2 is a coefficient, and the value is 10-60 Vh/m3Q water is water flow with unit of m3H; the addition of the ozone in the microporous ozone aeration treatment tank in the step 4) is Q ozone-C3Q water,wherein C3 is a coefficient of 5-10 g/m3Q water is water flow with unit of m3/h。
The beneficial effects of the invention are as follows:
1) the invention removes large-particle solid suspended matters in water by a physical filtering means, then coagulates and precipitates, separates upper clear water, lower muddy water and bottom sludge, carries out oxygenation treatment on the upper clear water and then flows back to a town river, discharges the bottom sludge into a sludge tank, further carries out ionization ion group coagulation treatment on the lower muddy water, carries out coagulative precipitation and separation treatment before carrying out ionization ion group coagulation treatment, effectively reduces the treatment load, improves the sewage treatment efficiency, and effectively reduces the treatment cost.
2) The settling channel is internally provided with the baffle plate, sewage is fully mixed and reacted with a coagulant in the water inlet tank by using the turbulent flow effect, the inclined tube is erected in the settling zone, the water flow organization is improved, the efficiency of the settling tank is enhanced by using the laminar flow principle, the design of the settling channel enables the sewage to be gradually settled in the flowing process, the treated water amount is large, and the treatment efficiency is high.
3) The invention treats the turbid water which is primarily separated by an ionized ion group coagulation technology, so that the physical property of the water body is changed under the action of an electrostatic field, various strong oxide substances generated by chlorine ions, oxygen molecules and water molecules dissolved in the water body can break chain-shaped macromolecules in the water body into single molecules, the subsequent treatment is facilitated, meanwhile, ion groups release silicon ions, boron ions and other ion groups under the ionization action, a synergistic interaction effect is generated with an added coagulant, and SS, COD, ammonia nitrogen, chromaticity and the like of the water body are reduced through a physical and chemical reaction. According to the invention, the electronic structure of water molecules is changed under the direct action of a high-voltage electrostatic field through a special-effect oxygenation technology, so that on one hand, the activity of a water body can be improved, harmful organisms can be killed, on the other hand, the dipole moment of the water body can be increased, and the oxygen-containing capacity of the water body can be greatly improved.
4) According to the invention, the microbial preparation is added into the separated sludge to decompose malodorous substances, and the treated sludge is dried and then recycled, so that the resource recycling is realized, and the sludge treatment cost is reduced.
Drawings
FIG. 1 is a flow chart of the method for treating urban black and odorous water.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
Example 1
As shown in fig. 1, the invention provides a method for treating urban black and odorous water, which comprises the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid;
3) coagulation and separation treatment: adding a coagulant into the effluent of the mechanical grid, introducing the sewage into a sedimentation channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the sedimentation channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge tank, and introducing the lower muddy water into a secondary treatment tank;
4) coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank;
5) sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
The front end of the sedimentation channel is provided with a baffle plate, and the baffle plate can ensure that sewage is fully mixed and reacted with a coagulant in the water inlet tank. The rear end of the sedimentation channel is provided with an inclined pipe, the inclined pipe can improve water flow organization, and the efficiency of the sedimentation tank is enhanced by utilizing the laminar flow principle. The length of the settling channel is 100-500m, and sewage can be settled in the flow, so that the sewage treatment efficiency can be greatly improved.
The specific oxygen increasing treatment is as follows: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
The ratio of the water quantity drained in the step 1) to the water quantity of the urban black and odorous water body is 1: 1-10;
the mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between grating bars is 3-20 mm. The coagulant in the step 3) is a mixture of polyacrylamide and at least one of polyaluminum chloride, polyaluminum ferric chloride and aluminum sulfate.
The addition amount of the coagulant in the step 3) is F coagulant multiplied by Q water, wherein F coagulant is 20+ BZ turbidity, B is coefficient and is 0.5-1.5, Z turbidity is turbidity of water discharged by a mechanical grating, and the unit of f coagulant is g/m3Q water is water flow with unit of m3/h。
The voltage U1 of the ionized ion cluster processing device in the step 4) is 1000+ C1Q water, wherein,u1 is not more than 10000V, C1 is a coefficient and the value is 0.5-10 Vh/m3Q water is water flow with unit of m3/h。
The ion group in the ionized ion group processing device in the step 4) is at least one of silicon ions, boron ions and aluminum ions.
The dosage of the polyacrylamide in the step 3) is 1-20 g/m3。
The voltage U2 of the ion bar processing system in the step 4) is 5000+ C2Q water, wherein U2 is not more than 20000V, C2 is a coefficient, and the value is 10-60 Vh/m3Q water is water flow with unit of m3/h。
Adding Q ozone-C3Q water into the microporous ozone aeration treatment tank in the step 4), wherein C3 is a coefficient and has a value of 5-10 g/m3Q water is water flow with unit of m3/h。
Example 2
A method for treating urban black and odorous water comprises the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers; the drainage in the step 1) is carried out, wherein the ratio of the drainage water volume to the urban black and odorous water volume is 1: 1;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid; the mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between grating bars is 3 mm;
3) coagulation and separation treatment: adding a coagulant into the water filtered by the mechanical grating, introducing the sewage into a settling channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the settling channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge pond, and introducing the lower muddy water into a secondary treatment pond; the coagulant in the step 3) is a mixture of polyaluminium chloride and polyacrylamide which are mixed according to the proportion of 1: 3; the coagulant in the step 3) has the dosing quantity Q of coagulant, namely f coagulant and water, wherein the dosing quantity f coagulant is 20+ BZ turbidity, B is a coefficient and has a value of 0.5, and Z turbidity is a mechanical latticeTurbidity of the grid effluent, unit of f coagulant is g/m3Q water is water flow with unit of m3H; the amount of the polyacrylamide in the step 3) is 1g/m3；
4) Coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank; the voltage U1 of the ionized ion cluster processing device in the step 4) is 1000+ C1Q water, wherein U1 is less than or equal to 10000V, and C1 is a coefficient with the value of 0.5Vh/m3Q water is water flow with unit of m3H; the ion group in the ionized ion group processing device in the step 4) is silicon ion; the voltage U2 of the ion bar processing system in the step 4) is 5000+ C2Q water, wherein U2 is less than or equal to 20000V, C2 is a coefficient with the value of 10Vh/m3Q water is water flow with unit of m3H; the addition of ozone in the microporous ozone aeration treatment tank in the step 4), wherein Q ozone is C3Q water, wherein C3 is a coefficient and has a value of 5g/m3Q water is water flow with unit of m3/h；
5) Sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
The front end of the sedimentation channel is provided with a baffle plate which enables the sewage to be fully mixed and reacted with the coagulant in the water inlet tank.
The rear end of the sedimentation channel is provided with an inclined pipe, the inclined pipe can improve water flow organization, and the efficiency of the sedimentation tank is enhanced by utilizing the laminar flow principle.
The length of the settling channel is 100m, and sewage can be settled in the flow, so that the sewage treatment efficiency can be greatly improved.
The oxygenation treatment in the step 3) is implemented by utilizing a micropore ozone aeration treatment tank to oxygenate.
The specific oxygen increasing treatment is as follows: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
Example 3
A method for treating urban black and odorous water comprises the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid;
3) coagulation and separation treatment: adding a coagulant into the water filtered by the mechanical grating, introducing the sewage into a settling channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the settling channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge pond, and introducing the lower muddy water into a secondary treatment pond;
4) coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank;
5) sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
The front end of the sedimentation channel is provided with a baffle plate which enables the sewage to be fully mixed and reacted with the coagulant in the water inlet tank.
The rear end of the sedimentation channel is provided with an inclined pipe, the inclined pipe can improve water flow organization, and the efficiency of the sedimentation tank is enhanced by utilizing the laminar flow principle.
The length of the settling channel is 300m, and sewage can be settled in the flow, so that the sewage treatment efficiency can be greatly improved.
The oxygenation treatment in the step 3) is implemented by utilizing a micropore ozone aeration treatment tank to oxygenate.
The specific oxygen increasing treatment is as follows: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
The drainage in the step 1) is carried out, wherein the ratio of the drainage water volume to the urban black and odorous water volume is 1: 5.
the mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between grating bars is 12 mm.
The coagulant in the step 3) is a mixture of polyaluminum ferric chloride and polyacrylamide.
The coagulant in the step 3), wherein the addition amount of the coagulant is Q, the coagulant is f, the coagulant is multiplied by Q water, the f coagulant is 20+ BZ turbidity, B is a coefficient and has a value of 1.0, Z turbidity is the turbidity of water discharged by a mechanical grating, and the unit of the f coagulant is g/m3Q water is water flow with unit of m3/h。
The amount of the polyacrylamide in the step 3) is 10g/m3。
The voltage U1 of the ionized ion cluster processing device in the step 4) is 1000+ C1Q water, wherein U1 is less than or equal to 10000V, and C1 is a coefficient with the value of 0.8Vh/m3Q water is water flow with unit of m3/h。
The ion group in the ionized ion group processing device in the step 4) is boron ion.
The voltage U2 of the ion bar processing system in the step 4) is 5000+ C2Q water, wherein U2 is not more than 20000V, C2 is a coefficient with the value of 35Vh/m3Q water is water flow with unit of m3/h。
The addition of ozone in the microporous ozone aeration treatment tank in the step 4), wherein Q ozone is C3Q water, wherein C3 is a coefficient and has a value of 8g/m3Q water is water flow with unit of m3/h。
Example 4
A method for treating urban black and odorous water comprises the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid;
3) coagulation and separation treatment: adding a coagulant into the water filtered by the mechanical grating, introducing the sewage into a settling channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the settling channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge pond, and introducing the lower muddy water into a secondary treatment pond;
4) coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank;
5) sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
The front end of the sedimentation channel is provided with a baffle plate which enables the sewage to be fully mixed and reacted with the coagulant in the water inlet tank.
The rear end of the sedimentation channel is provided with an inclined pipe, the inclined pipe can improve water flow organization, and the efficiency of the sedimentation tank is enhanced by utilizing the laminar flow principle.
The length of the settling channel is 500m, and sewage can be settled in the flow, so that the sewage treatment efficiency can be greatly improved.
The oxygenation treatment in the step 3) is implemented by utilizing a micropore ozone aeration treatment tank to oxygenate.
The specific oxygen increasing treatment is as follows: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
The drainage in the step 1) is carried out, wherein the ratio of the drainage water volume to the urban black and odorous water volume is 1: 10.
the mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between grating bars is 20 mm.
The coagulant in the step 3) is a mixture consisting of aluminum sulfate and polyacrylamide.
The addition amount of the coagulant in the step 3) is F coagulant multiplied by Q water, wherein F coagulant is 20+ BZ turbidity, B is coefficient and is 1.5, Z turbidity is the turbidity of the water discharged by a mechanical grating, and the unit of f coagulant is g/m3Q water is water flow with unit of m3/h。
The amount of the polyacrylamide in the step 3) is 20g/m3。
The voltage U1 of the ionized ion cluster processing device in the step 4) is 1000+ C1Q water, wherein U1 is less than or equal to 10000V, C1 is a coefficient and the value is 10Vh/m3Q water is water flow with unit of m3/h。
The ion group in the ionized ion group processing device in the step 4) is aluminum ion.
Step 4) voltage of the ion bar processing systemWater with U2 of 5000+ C2Q, wherein U2 is not more than 20000V, C2 is coefficient of 60Vh/m3Q water is water flow with unit of m3/h。
The addition of ozone in the microporous ozone aeration treatment tank in the step 4), wherein Q ozone is C3Q water, wherein C3 is a coefficient and has a value of 10g/m3Q water is water flow with unit of m3/h。
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for treating black and odorous water in cities and towns is characterized by comprising the following steps:
1) drainage: conducting whole or partial drainage on the black and odorous water body according to the water quantity and the pollution degree of the urban rivers;
2) filtering by a mechanical grid: filtering large particle solid suspended matters in the drained black and odorous water body through a mechanical grid;
3) coagulation and separation treatment: adding a coagulant into the water filtered by the mechanical grating, introducing the sewage into a settling channel, separating upper clear water, lower muddy water and bottom sludge at the tail end of the settling channel, performing oxygenation treatment on the upper clear water, then refluxing to an urban river, discharging the bottom sludge into a sludge pond, and introducing the lower muddy water into a secondary treatment pond;
4) coagulation treatment of ionized ion groups: introducing water entering a secondary treatment tank into an ionized ion group treatment device, controlling the voltage of the ionized ion group treatment device by an automatic control system according to water quality data, performing physicochemical strengthening treatment on a water body, introducing sewage into a coagulating sedimentation tank, adding a coagulant for coagulation reaction, introducing the sewage into a rapid sedimentation tank for mud-water separation, performing special-effect oxygenation treatment on the separated water, then refluxing to a town river, and discharging sludge into a sludge tank;
5) sludge treatment: microbial agents are added into the sludge in the sludge tank to decompose malodorous substances, and the treated sludge is dried and recycled.
2. The method for treating the urban black and odorous water body according to claim 1, wherein the front end of the settling channel is provided with a baffle plate, and the baffle plate enables sewage to be fully mixed and reacted with a coagulant in a water inlet tank; an inclined pipe is arranged at the rear end of the settling channel; the length of the settling channel is 100-500 m.
3. The method for treating the urban black and odorous water body according to claim 1, wherein the oxygen increasing treatment in the step 3) is carried out by using a microporous ozone aeration treatment tank for increasing oxygen.
4. The method for treating the black and odorous water in the town according to claim 1, wherein the specific oxygenation treatment specifically comprises: the method comprises the steps of carrying out online detection on the water quantity and dissolved oxygen of effluent, transmitting detection data into an automatic control system, introducing the detected effluent into an ion bar treatment system, controlling a high-voltage electric field of the ion bar by the automatic control system according to the water quantity to carry out physical strengthening treatment, introducing sewage into a microporous ozone aeration treatment tank, controlling an ozone generator by the automatic control system according to the water quantity to carry out oxygenation treatment on a water body, and refluxing the effluent of the microporous ozone aeration treatment tank to a town river.
5. The method for treating the black and odorous water in the town as claimed in claim 1, wherein the ratio of the drainage water amount to the black and odorous water amount in the town in step 1) is 1: 1 to 10.
6. The method for treating the black and odorous water in the town as claimed in claim 1, wherein the mechanical grating in the step 2) is one of an arm type grating machine, a chain type grating machine, a steel rope type grating machine and a rotary type grating machine, and the gap between the grating bars is 3-20 mm.
7. The method for treating urban black odorous water according to claim 1, wherein the coagulant in step 3) is a mixture of polyacrylamide and at least one of polyaluminum chloride, polyaluminum ferric chloride and aluminum sulfate.
8. The method for treating black and odorous water in cities and towns according to claim 1, wherein the coagulant in step 3) is added in an amount of Q coagulant (f coagulant and Q water), wherein f coagulant (20 + BZ turbidity), B is coefficient and has a value of 0.5-1.5, Z turbidity is turbidity of water discharged from a mechanical grid, and f coagulant unit is g/m3Q water is water flow with unit of m3H; the amount of the polyacrylamide in the step 3) is 1-20 g/m3。
9. The method for treating black and odorous water in cities and towns according to claim 1, wherein the voltage of the ionized ion cluster treatment device in step 4) is U1-1000 + C1Q water, wherein U1 is less than or equal to 10000V, and C1 is coefficient with value of 0.5-10 Vh/m3Q water is water flow with unit of m3H; the ion group in the ionized ion group processing device in the step 4) is one or the combination of any more of silicon ions, boron ions and aluminum ions; the voltage U2 of the ion bar processing system in the step 4) is 5000+ C2Q water, wherein U2 is not more than 20000V, C2 is a coefficient, and the value is 10-60 Vh/m3Q water is water flow with unit of m3H; adding ozone Q (Q ozone) -C3Q water into the microporous ozone aeration treatment tank in the step 4), wherein C3 is a coefficient and has a value of 5-10 g/m3Q water is water flow with unit of m3/h。
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