CN109095707A - A kind of urban wastewater treatment method and system - Google Patents
A kind of urban wastewater treatment method and system Download PDFInfo
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- CN109095707A CN109095707A CN201810865193.5A CN201810865193A CN109095707A CN 109095707 A CN109095707 A CN 109095707A CN 201810865193 A CN201810865193 A CN 201810865193A CN 109095707 A CN109095707 A CN 109095707A
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
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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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
The present invention provides a kind of urban wastewater treatment method and system, its method is in sewage disposal system, sewage disposal system includes: sewage conditioning tank, coarse rack, fine fack, setting pot, biochemistry pool, secondary settling tank and the sterilization pool being sequentially communicated, and EBR filler is provided in the biochemistry pool, can promote high efficient aeration system and carbon source dosing system；Sewage flows into coarse rack after conditioning tank processing；It is intercepted after suspended matter by coarse rack and flows into fine fack；It is intercepted after suspended matter by fine fack and flows into setting pot；It carries out flowing into biochemistry pool after sand setting processing by setting pot；Secondary settling tank is flowed into after handling by biochemistry pool；Sterilization pool is flowed into after handling by secondary settling tank；Clear water section is flowed into after the disinfection treatment of sterilization pool.By the way that biochemistry pool is transformed and be arranged in the treatment process of traditional urban wastewater treatment firm, realizes that sewage discharge reaches class IV class water body standard comprehensively, be increased to class IV class water body standard comprehensively.
Description
Technical field
The present invention relates to the field for the treatment of of water pollution of environmental project more particularly to a kind of urban wastewater treatment method and it is
System.
Background technique
As depicted in figs. 1 and 2, the typical sewage treatment process of existing urban wastewater treatment firm comparative maturity are as follows: sewage tune
Saving pond → coarse rack → fine fack → setting pot → biochemistry pool → secondary settling tank → coagulative precipitation tank (optional) → filtering cloth filtering pool (can
Choosing) → sterilization pool → discharge." urban wastewater treatment firm pollutant emission standard " can only achieve using this Process for Effluent index
(GB18918-2002) level-one B or level-one A standard, but class IV class water quality standard effluent index is also not achieved.Its index is shown in
Such as table 1:
The basic item controlled highest of table 1 allows concentration of emission (annual average) unit: mg/L (except dated)
The it is proposed of new standard will put forward higher requirements the selection of the treatment process of municipal sewage plant and design, emphasis
In the treatment process selection how being chosen to remove in the indexs such as COD, TN difficult to degrade, TP, SS, coloration.Urban wastewater treatment firm
The processing capacity of existing utility, which cannot achieve, reaches class IV class water discharge new standard, it is necessary to new technique is developed, to existing dirt
Water treatment plant carries out proposing mark transformation.
For this purpose, determination reaches class IV class water New emission standard, the emphasis of the technological design of mark transformation is mentioned are as follows:
(1) can be nervous with place for existing sewage treatment plant, the process choice that selection land occupation saves；
(2) the removal process choice of COD difficult to degrade is selected；
(3) the removal process choice of more advanced TN is selected；
(4) selection of stringenter SS removal technique is selected；
(5) selection of the process route of total phosphorus ligands is designed；
(6) color removal process choice is selected；.
Up to the present, also not it has been proposed that by urban wastewater treatment firm discharge water by " urban wastewater treatment firm pollutant
Discharge standard " (GB18918-2002) level-one B or level-one A standard, it is increased to the systems approach of class IV class water body standard comprehensively.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of urban wastewater treatment method
And system.
The technical scheme to solve the above technical problems is that a kind of urban wastewater treatment method, is used for sewage
In processing system, which includes: sewage conditioning tank, coarse rack, fine fack, setting pot, the biochemistry being sequentially communicated
Pond, secondary settling tank and sterilization pool,
The biochemistry pool is EBR biochemistry pool, be provided in the biochemistry pool EBR filler, can be promoted high efficient aeration system with
And carbon source dosing system；The described method includes:
S1: sewage to be processed is after the precipitating of sewage conditioning tank, mixing, dosing, neutralization and pre-acidified processing
Flow into coarse rack；
S2: thin lattice are flowed into after the intercepted removal bulky grain suspended matter of coarse rack by step S1 treated sewage
Grid；
S3: setting pot is flowed into after the intercepted removal small granular suspended matters of fine fack by S2 treated sewage；
S4: it carries out flowing into biochemistry pool after sand setting processing by setting pot by step S3 treated sewage；
S5: by step S4 treated sewage by biochemistry pool be removed ammonia nitrogen, removal total nitrogen, nitration denitrification with
And secondary settling tank is flowed into after the processing of the difficult biochemical COD of degradation；
S6: by step S5 treated sewage by the sludge separation of secondary settling tank, mixed liquor clarification, concentration and reflux
Sterilization pool is flowed into after activity processing；
S7: clear water section is flowed into after the disinfection treatment of sterilization pool by step S6 treated sewage.
The beneficial effects of the present invention are: by being transformed and being arranged in the treatment process of traditional urban wastewater treatment firm
Biochemistry pool realizes that sewage discharge reaches class IV class water body standard comprehensively.Urban wastewater treatment firm is drained by " urban wastewater treatment
Factory's pollutant emission standard " (GB18918-2002) level-one B or level-one A standard, it is increased to class IV class water body standard comprehensively.This
Invention, with the smallest investment and operating cost, drains town sewage in the case where not increasing the land occupation of existing sewage treatment plant
Be increased to class IV class water body standard comprehensively mentions mark.
Based on the above technical solution, the present invention can also be improved as follows.
Further, further includes: magnetic-coagulation sedimentation basin and filtering cloth filtering pool, the magnetic-coagulation sedimentation basin are arranged described two
Between heavy pond and the sterilization pool, the filtering cloth filtering pool is arranged between the magnetic-coagulation sedimentation basin, the magnetic-coagulation sedimentation basin
In be provided with COD remover, coagulant, magnetic powder and flocculant.
Beneficial effect using above-mentioned further scheme is: by adding COD remover, by oxidation and suction-operated,
Further removal hardly possible biochemistry COD and coloration；By dosing coagulant, so that phosphate is formed small phosphate particle, make colloid
The de- steady formation suspended matter of substance, then adds the medicaments such as magnetic powder and flocculant aid again, high specific gravity composite flocculation body is formed, in magnetic powder
Booster action under, efficiently remove sewage suspended matter and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤
0.3mg/L, 0≤15 times of coloration, COD≤30mg/L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, can be in magnetic-coagulation
It adds filtering cloth filtering pool behind sedimentation basin to check on technique, it is ensured that the discharge of SS and TP stably reaching standard.
Further, the COD remover is powdered carbon and/or diatomite and/or bleaching powder and/or powdery peroxide；
The magnetic powder is natural Fe3O4Magnetic powder, the particle size range of magnetic powder are 100 mesh~300 mesh；
The coagulant is aluminium salt and/or molysite and/or poly-aluminium and/or Polyferric Sulfate；
The flocculant is anionic polyacrylamide and/or cationic polyacrylamide and/or nonionic polyacrylamide
Amine and/or food grade polyacrylamide；The dosage of the flocculant is 0.1~5mg/L.
Beneficial effect using above-mentioned further scheme is: by adding COD remover, by oxidation and suction-operated,
Further removal hardly possible biochemistry COD and coloration；By dosing coagulant, so that phosphate is formed small phosphate particle, make colloid
The de- steady formation suspended matter of substance, then adds the medicaments such as magnetic powder and flocculant aid again, high specific gravity composite flocculation body is formed, in magnetic powder
Booster action under, efficiently remove sewage suspended matter and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤
0.3mg/L, 0≤15 times of coloration, COD≤30mg/L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, can be in magnetic-coagulation
It adds filtering cloth filtering pool behind sedimentation basin to check on technique, it is ensured that the discharge of SS and TP stably reaching standard.
Further, the aluminium salt is aluminum sulfate or aluminium chloride；The molysite is ferric sulfate or ferrous sulfate；It is described
Poly-aluminium is aluminium polychloride, polyaluminium sulfate or polymer aluminium silicate；The Polyferric Sulfate be poly-ferric chloride, bodied ferric sulfate or
Polyferric silicate sulfate；The dosage of the coagulant is 1~50mg/L.
Beneficial effect using above-mentioned further scheme is: by adding COD remover, by oxidation and suction-operated,
Further removal hardly possible biochemistry COD and coloration；By dosing coagulant, so that phosphate is formed small phosphate particle, make colloid
The de- steady formation suspended matter of substance, then adds the medicaments such as magnetic powder and flocculant aid again, high specific gravity composite flocculation body is formed, in magnetic powder
Booster action under, efficiently remove sewage suspended matter and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤
0.3mg/L, 0≤15 times of coloration, COD≤30mg/L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, can be in magnetic-coagulation
It adds filtering cloth filtering pool behind sedimentation basin to check on technique, it is ensured that the discharge of SS and TP stably reaching standard reduces production cost.
Further, the water intake mode of the filtering cloth filtering pool be it is outer into it is interior go out formula or be inside-admission outside-exit type；The filter cloth
The filter cloth material in filter tank is fiber filter cloth, polyester-type filter cloth or stainless steel filtering net.
Beneficial effect using above-mentioned further scheme is: transforming original coagulative precipitation tank as magnetic-coagulation sedimentation basin, such as
Fruit is originally without coagulative precipitation tank and filtering cloth filtering pool, can benefit since magnetic-coagulation sedimentation basin and filtering cloth filtering pool occupied area are very small
Magnetic-coagulation sedimentation basin and filtering cloth filtering pool (optional) are increased newly with sewage plant vacant lot, will not increase total occupied area of sewage plant newly.Relatively
In techniques such as MBR, ultrafiltration membrance filters, investment can save 50% or more.
Further, the EBR filler is fixed filler and/or floating stuffing, and the set amount of the EBR filler is biochemistry
The 1%~80% of pool volume；
It is described promoted high efficient aeration system be lift microporous aerator and/or elevated rotational flow aeration device and/
Or Roots blower and/or centrifugal blower and/or air suspension air blower；
The carbon source dosing system is liquid medicine system and/or powder medicine system；Wherein, the liquid medicine system
In liquid to add object be methanol and/or ethyl alcohol and/or sodium acetate and/or carbohydrate.
Beneficial effect using above-mentioned further scheme is: reducing the use cost of material, improves sewage water treatment method
Reliability.
Further, it is additionally provided in the biochemistry pool: magnetic powder loading equipemtn, high shearing machine and magnetic powder separator, it is described
The relative density of the magnetic powder loaded in magnetic powder loading equipemtn is 5.2；
In the step S5, comprising:
S51, ammonia nitrogen, removal total nitrogen, nitration denitrification and degradation hardly possible are removed by passing through biochemistry pool in step S5
Magnetic powder loading equipemtn is flowed into after the processing of biochemical COD；
S52, by step S51 treated sewage after the magnetic powder loading processing of magnetic powder loading equipemtn, flow to height
At shearing machine and magnetic powder separator position；
S53, it is recycled through the magnetic powder of excessively high shearing machine and magnetic powder separator by step S52 treated sewage
Afterwards, it flow to secondary settling tank.
Beneficial effect using above-mentioned further scheme is: on the basis of traditional coagulation-settlement process, increasing magnetic powder
The equipment such as loading equipemtn, high shearing machine and magnetic separator.Since the magnetic powder relative density of load is 5.2, wadding body is effectively increased
Total body density, accelerate floc settling velocity.The sludge of the wadding body containing magnetic powder of high speed settling is via high shearing machine and magnetic separator
Magnetic powder is recycled, is recycled.Magnetic-coagulation sedimentation basin base sludge is obtained due to being influenced by load magnetic powder gravity and magnetic force
Abundant concentration, sludge concentration is up to 3% or more, and its stability is high, substantially increase and catch to tiny solid suspended matter
Catch removal efficiency.
In addition, the present invention also provides a kind of town sewage treatment systems comprising: the sewage conditioning tank that is sequentially communicated,
Coarse rack, fine fack, setting pot, biochemistry pool, secondary settling tank and sterilization pool, the biochemistry pool are EBR biochemistry pool, the biochemistry pool
In be provided with EBR filler, high efficient aeration system can be promoted and carbon source dosing system.
The beneficial effects of the present invention are: by being transformed and being arranged in the treatment process of traditional urban wastewater treatment firm
Biochemistry pool realizes that sewage discharge reaches class IV class water body standard comprehensively.Urban wastewater treatment firm is drained by " urban wastewater treatment
Factory's pollutant emission standard " (GB18918-2002) level-one B or level-one A standard, it is increased to class IV class water body standard comprehensively.This
Invention, with the smallest investment and operating cost, drains town sewage in the case where not increasing the land occupation of existing sewage treatment plant
Be increased to class IV class water body standard comprehensively mentions mark.
Detailed description of the invention
Fig. 1 is one of the process flow chart of sewage treatment in the prior art.
Fig. 2 is the two of the process flow chart of sewage treatment in the prior art.
Fig. 3 is one of the process flow chart of sewage treatment provided in an embodiment of the present invention.
Fig. 4 is the two of the process flow chart of sewage treatment provided in an embodiment of the present invention.
Fig. 5 is the schematic flow chart of sewage water treatment method provided in an embodiment of the present invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
As shown in Figures 1 to 5, Fig. 1 is one of the process flow chart of sewage treatment in the prior art.Fig. 2 is existing skill
The two of the process flow chart of sewage treatment in art.Fig. 3 be sewage treatment provided in an embodiment of the present invention process flow chart it
One.Fig. 4 is the two of the process flow chart of sewage treatment provided in an embodiment of the present invention.Fig. 5 is dirt provided in an embodiment of the present invention
The schematic flow chart of method for treating water.
As shown in figure 5, being used for sewage disposal system the embodiment of the invention provides a kind of urban wastewater treatment method
In, which includes: sewage conditioning tank, coarse rack, fine fack, setting pot, biochemistry pool, the secondary settling tank being sequentially communicated
And sterilization pool,
The biochemistry pool is EBR (a kind of important plant growth regulator) biochemistry pool, is provided with EBR in the biochemistry pool
Filler can promote high efficient aeration system and carbon source dosing system；The described method includes:
S1: sewage to be processed is after the precipitating of sewage conditioning tank, mixing, dosing, neutralization and pre-acidified processing
Flow into coarse rack；
S2: thin lattice are flowed into after the intercepted removal bulky grain suspended matter of coarse rack by step S1 treated sewage
Grid；
S3: sand setting is flowed into after the intercepted removal small granular suspended matters of fine fack by step S2 treated sewage
Pond；
S4: it carries out flowing into biochemistry pool after sand setting processing by setting pot by step S3 treated sewage；
S5: by step S4 treated sewage by biochemistry pool be removed ammonia nitrogen, removal total nitrogen, nitration denitrification with
And after the processing of the difficult biochemical COD (COD is also known as chemical oxygen consumption (COC), chemical oxygen demand) of degradation
Flow into secondary settling tank；
S6: by step S5 treated sewage by the sludge separation of secondary settling tank, mixed liquor clarification, concentration and reflux
Sterilization pool is flowed into after activity processing；
S7: clear water section is flowed into after the disinfection treatment of sterilization pool by step S6 treated sewage.
In the above method, a kind of draining of town sewage plant mentions mark by what primary standard was increased to class IV class standard water body comprehensively
Method.In existing urban wastewater treatment firm exemplary process technique: sewage conditioning tank → coarse rack → fine fack → setting pot → life
Based on changing pond → secondary settling tank → coagulative precipitation tank (optional) → filtering cloth filtering pool (optional) → sterilization pool → discharge, set by transformation
It sets two group technology units (the biological reinforced unit of EBR and magnetic-coagulation precipitation unit) and realizes that sewage discharge reaches class IV comprehensively
Class water body standard.Improved treatment process are as follows: sewage conditioning tank → coarse rack → fine fack → setting pot → EBR biochemistry pool →
Secondary settling tank → magnetic-coagulation sedimentation basin → filtering cloth filtering pool (optional) → sterilization pool → discharge.Two group technology units are specific as follows:
(1) it the biological reinforced unit of EBR: transform original biochemistry pool as EBR biochemistry pool, specially increases in former biochemistry pool
EBR filler can promote efficient enhanced aeration system and carbon source dosing system.Meanwhile the biological reinforced unit of EBR can remove ammonia
Nitrogen, total nitrogen and difficult biochemical COD.
(2) magnetic-coagulation precipitation unit: by original coagulative precipitation tank transform as magnetic-coagulation sedimentation basin (or newly-increased magnetic-coagulation precipitate
Pond+filtering cloth filtering pool (optional)；COD remover, coagulant, magnetic powder, flocculant are added in magnetic-coagulation precipitation unit, it can be ensured that SS
(solid suspension, suspend solid), TP (total phosphorus, total phosphorus), COD and chroma stability qualified discharge.
The specified microorganisms of the biological reinforced unit of EBR are with synchronous nitration and denitrification and difficult biochemistry COD function of degrading
Microorganism.
The magnetic-coagulation sedimentation basin of magnetic-coagulation precipitation unit is to increase magnetic powder on the basis of traditional coagulation-settlement process and add
Carry the equipment such as equipment, high shearing machine and magnetic powder separator.Since the magnetic powder relative density of load is 5.2, wadding body is effectively increased
Total body density, accelerate floc settling velocity.The floc sludge containing magnetic powder of high speed settling is via high shearing machine and magnetic powder separator
Magnetic powder is recycled, is recycled.
The COD remover of magnetic-coagulation precipitation unit is one kind or more of powdered carbon, diatomite, bleaching powder, powdery peroxide
Kind combination.
The invention belongs to the field for the treatment of of water pollution of environmental project, more specifically refer to and arrange urban wastewater treatment firm
Water is increased to comprehensively by " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) level-one B or level-one A standard
The method of class IV class water body standard.
A kind of draining of town sewage plant proposes mark method by what primary standard was increased to class IV class standard water body comprehensively.
The present invention provide it is a kind of by urban wastewater treatment firm discharge water by " urban wastewater treatment firm pollutant emission standard "
(GB18918-2002) level-one B or level-one A standard are increased to the method for class IV class water body standard comprehensively.Main purpose is
In the case where not increasing existing sewage treatment plant's land occupation, with the smallest investment and operating cost, mention town sewage draining comprehensively
Height proposes mark method to class IV class water body standard.
The present invention adopts the following technical scheme:
It is a kind of that urban wastewater treatment firm is discharged into water by " urban wastewater treatment firm pollutant emission standard " (GB18918-
2002) level-one B or level-one A standard, the method for being increased to class IV class water body standard comprehensively, it is with the original of existing town sewage plant
Technique: sewage conditioning tank → coarse rack → fine fack → setting pot → biochemistry pool → secondary settling tank → coagulative precipitation tank (optional) → filter
Based on cloth filter tank (optional) → sterilization pool → discharge, two group technology unit (biological reinforced lists of EBR are arranged by transformation
Member and magnetic-coagulation precipitation unit) realize that sewage discharge reaches class IV class water body standard comprehensively.Improved treatment process are as follows: sewage
Conditioning tank → coarse rack → fine fack → setting pot → EBR biochemistry pool → secondary settling tank → magnetic-coagulation sedimentation basin → filtering cloth filtering pool (can
Choosing) → sterilization pool → discharge.Two group technology units are specific as follows:
(1) in the case where not increasing land occupation and pool capacity, it is raw the biological reinforced unit of EBR: to transform existing biochemistry pool as EBR
Change pond.It is specific as follows: to increase EBR filler in the biochemistry pool of original process, can be promoted and strengthen high efficient aeration system and carbon source and add
System adds specified microorganisms in EBR biochemistry pool, by being formed after culture specified microorganisms on EBR filler with nitrifier
With the enhanced biological film based on extraordinary microorganism, short distance nitration and denitrification function are realized in EBR biochemistry pool, are realized more efficient
The management goal for removing ammonia nitrogen, total nitrogen, simultaneously because EBR filler increases extraordinary microbial biomass, in the sewage that can further degrade
The biochemical COD of hardly possible, further decrease former biochemistry pool water outlet COD concentration.The biological reinforced unit of EBR can remove ammonia nitrogen, total
Nitrogen and difficult biochemical COD.
(2) magnetic-coagulation precipitation unit: in the case where not increasing land occupation, if original coagulative precipitation tank and filtering cloth filtering pool,
Then original coagulative precipitation tank can be transform as magnetic-coagulation sedimentation basin；If (there is no coagulative precipitation tank and filtering cloth filtering pool originally,
Magnetic-coagulation sedimentation basin and filtering cloth filtering pool (optional) can be added), since the surface loading of magnetic-coagulation sedimentation basin is 10-20m/h, than normal
Fast 10 times of upflow velocity or more of sedimentation basin are advised, occupied area is small, and the land occupation of filtering cloth filtering pool also very little, it is possible to existing
It is arranged on the vacant lot of sewage treatment plant, not will increase total land occupation of town sewage plant.In magnetic-coagulation sedimentation basin, by adding
COD remover further removes hardly possible biochemistry COD and coloration by oxidation and suction-operated；By dosing coagulant, make phosphoric acid
Salt forms small phosphate particle, makes the de- steady formation suspended matter of colloidal substance, then adds the medicines such as magnetic powder and flocculant aid again
Agent forms high specific gravity composite flocculation body, under the booster action of magnetic powder, efficiently removes the suspended matter and total phosphorus of sewage.Magnetic-coagulation
Precipitation unit may insure SS≤5mg/L, TP≤0.3mg/L, 0≤15 times of coloration, COD≤30mg/L.To ensure that magnetic-coagulation is heavy
The stable water outlet in shallow lake pond is up to standard, and filtering cloth filtering pool can be added behind magnetic-coagulation sedimentation basin and is checked on technique, it is ensured that SS and TP stablizes
Qualified discharge.
EBR filler described in first technique unit is one or two kinds of combinations of fixed filler, floating stuffing；It is described
Strengthen promoted high efficient aeration system be lift microporous aerator, elevated rotational flow aeration device, Roots blower, from
One or more combinations of heart air blower, air suspension air blower；The carbon source dosing system is to add methanol, ethyl alcohol, second
One or more combinations of sour sodium, carbohydrate, the medicine system of liquid, powder medicine system；
The set amount of EBR filler described in first technique unit is 1%~-the 80% of biochemical pool volume；
Specified microorganisms described in first technique unit are with synchronous nitration and denitrification and difficult biochemistry COD function of degrading
The microorganism of energy.
Magnetic-coagulation sedimentation basin described in second technique unit is to increase on the basis of traditional coagulation-settlement process
The equipment such as magnetic powder loading equipemtn, high shearing machine and magnetic separator.Since the magnetic powder relative density of load is 5.2, effectively increase
The total body density of wadding body, accelerates floc settling velocity.The sludge of the wadding body containing magnetic powder of high speed settling is via high shearing machine and magnetic point
Magnetic powder is recycled from device, is recycled.Magnetic-coagulation sedimentation basin base sludge due to by load magnetic powder gravity and magnetic force influenced,
Abundant concentration is obtained, sludge concentration is up to 3% or more, and its stability is high, substantially increases and goes to the capture of tiny SS
Except efficiency.
COD remover described in second technique unit is one kind of powdered carbon, diatomite, bleaching powder, powdery peroxide
Or multiple combinations；
Magnetic powder described in second technique unit is natural Fe3O4Magnetic powder, the granularity of magnetic powder are 100-300 mesh；
Coagulant described in second technique unit is one or more combinations of aluminium salt, molysite, poly-aluminium, Polyferric Sulfate；It is described
Aluminium salt is aluminum sulfate or aluminium chloride；The molysite is ferric sulfate, ferrous sulfate；The poly-aluminium is aluminium polychloride, polyaluminum sulfate
Aluminium or polymer aluminium silicate；The Polyferric Sulfate is poly-ferric chloride, bodied ferric sulfate or polyferric silicate sulfate；Dosage is 1~50mg/L.
Flocculant aid described in second technique unit be anionic polyacrylamide, cationic polyacrylamide, it is non-from
One or more combinations of sub- polyacrylamide, food grade polyacrylamide；Dosage is 0.1~5mg/L.
Filtering cloth filtering pool water intake mode described in second technique unit is outside into interior formula, one kind of inside-admission outside-exit type out；Filter
The filter cloth material in cloth filter tank is one kind of fiber filter cloth, polyester-type filter cloth, stainless steel filtering net；
Pass through two above group technology unit, it can be ensured that water outlet COD, BOD, total nitrogen, ammonia nitrogen, total phosphorus, dynamic plant oil, stone
The indexs such as oils, anionic surfactant, coloration reach class IV class water body standard comprehensively.
Above-mentioned first technique unit can be biochemistry pool, and the second technique unit can be magnetic-coagulation sedimentation basin.
The present invention has the advantage that
1. solving existing sewage plant mentions the inadequate Realistic Dilemma in the no place of mark or place institute.
2. existing facility and the substantially all utilization of equipment not will cause original investment waste.
3. former biochemistry pool only increases EBR filler, can strengthen promotion aerating system, carbon on the basis of original process and equipment
Source dosing system is not required to newly-increased land occupation, is not required to expand former biochemistry pool pool capacity, without civil engineering, every cube of sewage newly-increased investment
Nearly half is saved than other methods, the transformation duration can shorten 50% or more.
4. original coagulative precipitation tank is transform as magnetic-coagulation sedimentation basin, if filtered originally without coagulative precipitation tank and filter cloth
Pond increases magnetic-coagulation sedimentation basin newly using sewage plant vacant lot since magnetic-coagulation sedimentation basin and filtering cloth filtering pool occupied area are very small
With filtering cloth filtering pool (optional), total occupied area of sewage plant will not be increased newly.Relative to techniques such as MBR, ultrafiltration membrance filters, investment can
To save 50% or more.
5. the processing cost of every side's sewage increases the operation less than 30% on the basis of the operating cost of level-one B or level-one A
Expense is low.
By the way that biochemistry pool is transformed and be arranged in the treatment process of traditional urban wastewater treatment firm, sewage discharge is realized
Reach class IV class water body standard comprehensively.Urban wastewater treatment firm is drained by " urban wastewater treatment firm pollutant emission standard "
(GB18918-2002) level-one B or level-one A standard are increased to class IV class water body standard comprehensively.The present invention is not increasing existing dirt
In the case that water treatment plant takes up an area, with the smallest investment and operating cost, town sewage draining is made to be increased to class IV class water comprehensively
Body standard mentions mark.
Based on the above technical solution, the present invention can also be improved as follows.
Further, further includes: magnetic-coagulation sedimentation basin and filtering cloth filtering pool, the magnetic-coagulation sedimentation basin are arranged described two
Between heavy pond and the sterilization pool, the filtering cloth filtering pool is arranged between the magnetic-coagulation sedimentation basin, the magnetic-coagulation sedimentation basin
In be provided with COD remover, coagulant, magnetic powder and flocculant.
By adding COD remover, by oxidation and suction-operated, hardly possible biochemistry COD and coloration are further removed；Pass through
Dosing coagulant makes phosphate form small phosphate particle, makes the de- steady formation suspended matter of colloidal substance, then adds magnetic again
The medicaments such as powder and flocculant aid form high specific gravity composite flocculation body, under the booster action of magnetic powder, efficiently remove the suspension of sewage
Object and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤0.3mg/L, 0≤15 times of coloration, COD≤30mg/
L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, and filtering cloth filtering pool can be added behind magnetic-coagulation sedimentation basin and is checked on work
Skill, it is ensured that SS and TP stably reaching standard discharge.
Further, the COD remover is powdered carbon and/or diatomite and/or bleaching powder and/or powdery peroxide；
The magnetic powder is natural Fe3O4Magnetic powder, the particle size range of magnetic powder are 100 mesh~300 mesh；
The coagulant is aluminium salt and/or molysite and/or poly-aluminium and/or Polyferric Sulfate；
The flocculant is anionic polyacrylamide and/or cationic polyacrylamide and/or nonionic polyacrylamide
Amine and/or food grade polyacrylamide；The dosage of the flocculant is 0.1~5mg/L.
The magnetic powder of magnetic-coagulation precipitation unit is natural Fe3O4Magnetic powder, the granularity of magnetic powder are 100~300 mesh.
The coagulant of magnetic-coagulation precipitation unit is one or more combinations of aluminium salt, molysite, poly-aluminium, Polyferric Sulfate；The aluminium salt
For aluminum sulfate or aluminium chloride；The molysite is ferric sulfate, ferrous sulfate；The poly-aluminium be aluminium polychloride, polyaluminium sulfate or
Polymer aluminium silicate；The Polyferric Sulfate is poly-ferric chloride, bodied ferric sulfate or polyferric silicate sulfate；Dosage is 1~50mg/L.
The flocculant of magnetic-coagulation precipitation unit is anionic polyacrylamide, cationic polyacrylamide, nonionic poly- third
One or more combinations of acrylamide, food grade polyacrylamide；Dosage is 0.1~5mg/L.
By adding COD remover, by oxidation and suction-operated, hardly possible biochemistry COD and coloration are further removed；Pass through
Dosing coagulant makes phosphate form small phosphate particle, makes the de- steady formation suspended matter of colloidal substance, then adds magnetic again
The medicaments such as powder and flocculant aid form high specific gravity composite flocculation body, under the booster action of magnetic powder, efficiently remove the suspension of sewage
Object and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤0.3mg/L, 0≤15 times of coloration, COD≤30mg/
L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, and filtering cloth filtering pool can be added behind magnetic-coagulation sedimentation basin and is checked on work
Skill, it is ensured that SS and TP stably reaching standard discharge.
Further, the aluminium salt is aluminum sulfate or aluminium chloride；The molysite is ferric sulfate or ferrous sulfate；It is described
Poly-aluminium is aluminium polychloride, polyaluminium sulfate or polymer aluminium silicate；The Polyferric Sulfate be poly-ferric chloride, bodied ferric sulfate or
Polyferric silicate sulfate；The dosage of the coagulant is 1~50mg/L.
By adding COD remover, by oxidation and suction-operated, hardly possible biochemistry COD and coloration are further removed；Pass through
Dosing coagulant makes phosphate form small phosphate particle, makes the de- steady formation suspended matter of colloidal substance, then adds magnetic again
The medicaments such as powder and flocculant aid form high specific gravity composite flocculation body, under the booster action of magnetic powder, efficiently remove the suspension of sewage
Object and total phosphorus.Magnetic-coagulation precipitation unit may insure SS≤5mg/L, TP≤0.3mg/L, 0≤15 times of coloration, COD≤30mg/
L.Stable water outlet to ensure magnetic-coagulation sedimentation basin is up to standard, and filtering cloth filtering pool can be added behind magnetic-coagulation sedimentation basin and is checked on work
Skill, it is ensured that the discharge of SS and TP stably reaching standard reduces production cost.
Further, the water intake mode of the filtering cloth filtering pool be it is outer into it is interior go out formula or be inside-admission outside-exit type；The filter cloth
The filter cloth material in filter tank is fiber filter cloth, polyester-type filter cloth or stainless steel filtering net.
The filtering cloth filtering pool water intake mode of magnetic-coagulation precipitation unit is outside into interior formula, one kind of inside-admission outside-exit type out；Filter cloth filter
The filter cloth material in pond is one kind of fiber filter cloth, polyester-type filter cloth, stainless steel filtering net
It transform original coagulative precipitation tank as magnetic-coagulation sedimentation basin, if there is no coagulative precipitation tank and filtering cloth filtering pool originally,
Since magnetic-coagulation sedimentation basin and filtering cloth filtering pool occupied area are very small, magnetic-coagulation sedimentation basin and filter are increased newly using sewage plant vacant lot
Cloth filter tank (optional) will not increase total occupied area of sewage plant newly.Relative to techniques such as MBR, ultrafiltration membrance filters, investment can be saved
Save 50% or more.
Further, the EBR filler is fixed filler and/or floating stuffing, and the set amount of the EBR filler is biochemistry
The 1%~80% of pool volume；
It is described promoted high efficient aeration system be lift microporous aerator and/or elevated rotational flow aeration device and/
Or Roots blower and/or centrifugal blower and/or air suspension air blower；
The carbon source dosing system is liquid medicine system and/or powder medicine system；Wherein, the liquid medicine system
In liquid to add object be methanol and/or ethyl alcohol and/or sodium acetate and/or carbohydrate.
The EBR filler of the biological reinforced unit of EBR is one or two kinds of combinations of fixed filler, floating stuffing.EBR filler
Set amount is the 1%~80% of biochemical pool volume.The biological reinforced unit of EBR promotes high efficient aeration system are as follows: elevated
One kind or more of micro-hole aerator, elevated rotational flow aeration device, Roots blower, centrifugal blower, air suspension air blower
Kind combination.The carbon source dosing system of the biological reinforced unit of EBR is methanol, ethyl alcohol, sodium acetate, carbohydrate, liquid medicine system, powder
One or more combinations of medicine system；Add one or more combinations that object is methanol, ethyl alcohol, sodium acetate, carbohydrate.
The use cost for reducing material, improves the reliability of sewage water treatment method.
Further, it is additionally provided in the biochemistry pool: magnetic powder loading equipemtn, high shearing machine and magnetic powder separator, it is described
The relative density of the magnetic powder loaded in magnetic powder loading equipemtn is 5.2；
In the step S5, comprising:
S51, ammonia nitrogen, removal total nitrogen, nitration denitrification and degradation hardly possible are removed by passing through biochemistry pool in step S5
Magnetic powder loading equipemtn is flowed into after the processing of biochemical COD；
S52, by step S51 treated sewage after the magnetic powder loading processing of magnetic powder loading equipemtn, flow to height
At shearing machine and magnetic powder separator position；
S53, it is recycled through the magnetic powder of excessively high shearing machine and magnetic powder separator by step S52 treated sewage
Afterwards, it flow to secondary settling tank.
High-speed shearing machine is one kind of cutter, is to be combined using ultrasonic fusing technology with tradition shearing, in ultrasound
When wave producer works, ultrasonic energy is passed into soldering tip by ultrasonic transducer and generates high vibration friction with cutting die,
To achieve the effect that shearing, shear product is made to have the advantages that more attractive, stronger, production efficiency is more efficient quick.
The magnetic-coagulation sedimentation basin of magnetic-coagulation precipitation unit is to increase magnetic powder on the basis of traditional coagulation-settlement process and add
Carry the equipment such as equipment, high shearing machine and magnetic powder separator.Since the magnetic powder relative density of load is 5.2, wadding body is effectively increased
Total body density, accelerate floc settling velocity.The floc sludge containing magnetic powder of high speed settling is via high shearing machine and magnetic powder separator
Magnetic powder is recycled, is recycled.
On the basis of traditional coagulation-settlement process, increases magnetic powder loading equipemtn, high shearing machine and magnetic separator etc. and set
It is standby.Since the magnetic powder relative density of load is 5.2, the total body density of wadding body is effectively increased, floc settling velocity is accelerated.It is high
The sludge of the wadding body containing magnetic powder of speed sedimentation recycles magnetic powder via high shearing machine and magnetic separator, is recycled.Magnetic-coagulation is heavy
Shallow lake bottom of pond portion sludge has obtained abundant concentration due to being influenced by load magnetic powder gravity and magnetic force, sludge concentration up to 3% or more,
And its stability is high, substantially increases the capture removal efficiency to tiny solid suspended matter.
In addition, the present invention also provides a kind of town sewage treatment systems comprising: the sewage conditioning tank that is sequentially communicated,
Coarse rack, fine fack, setting pot, biochemistry pool, secondary settling tank and sterilization pool, the biochemistry pool are EBR biochemistry pool, the biochemistry pool
In be provided with EBR filler, high efficient aeration system can be promoted and carbon source dosing system.
Secondary settling tank, that is, secondary sedimentation tank (secondary settling tank), secondary settling tank is the weight of activated Sludge System
Component part is wanted, effect mainly separates sludge, makes mixed liquor clarification, concentration and returnedactivatedsludge.Its working effect
The effluent quality and returned sludge concentration of activated Sludge System can be directly affected.
Sewage conditioning tank, in order to work normally pipe duct and structures, not by waste water peak flow or the shadow of concentration variation
It rings, conditioning tank need to be set before waste water disposal facility.
Biochemistry pool provides the sewage treatment of time-program(me), rather than the sewage treatment of the space program continuously provided.It is raw
Change cell system and is not required to primary sedimentation tank, secondary settling tank and sludge recirculation system, ideal quiet heavy, good separating effect.
Setting pot, sewage in migration, flow and be inevitably mixed into silt particle during collecting.If the sand in sewage is not
Preparatory sedimentation separation removal, then will affect the operation of subsequent processing device.Most importantly wear pump, blocking pipe network, interference
Even destroy biochemical processing process process.Setting pot is mainly used for removing partial size in sewage and is greater than 0.2mm, and density is greater than 2.65t/
The sand grains of cubic meter, with facilities such as protective conduit, valves from wearing and blocking.Its working principle is that using Gravity Separation as base
Plinth, therefore the water inlet flow velocity of setting pot should be controlled, so that heavy inorganic particle sinks, and organic suspension particle can be with water flow
It takes away.Setting pot mainly has horizontal-flow grit chamber, aerated grit chamber, rotational flow grit chamber etc..
The common disinfection reagent of sewage treatment plant: NaClO, liquid chlorine, CaClO etc., effective component are hypochlorite.Mainly
Function: the pathogenic microbes after kill processing in sewage.
Experiment one:
The example of modification of certain urban wastewater treatment firm, 60,000 m for the treatment of scale3/ d, 75% industrial wastewater, 25% in sewage water
For sanitary sewage, biochemistry pool is opel oxidation ditch, and secondary clarifier effluent can reach level-one B discharge standard before being transformed.
First part: transforming opel oxidation ditch as EBR biochemistry pool, is embodied as being arranged in opel oxidation ditch
EBR filler (loading 30%), micro-hole aerator can be promoted, Roots blower, (glucose adds glucose carbon source dosing system
Measure 30mg/L) ability；
Second part: adding magnetic-coagulation sedimentation basin and filtering cloth filtering pool between secondary settling tank and sterilization pool, precipitates in magnetic-coagulation
COD remover 10mg/L, aluminium polychloride 30mg/L, 120 mesh magnetic powders, anionic polyacrylamide 1mg/L are added in pond.
After transformation, the EBR biochemistry pool water outlet is through original secondary clarifier effluent, the water outlet of magnetic flocculation sedimentation basin, filtering cloth filtering pool+disappear
Malicious pond effluent quality index such as table 2.
Certain sewage treatment plant of table 2 proposes effluent quality index (annual average) unit of formant after mark transformation: mg/L (is indicated
Except)
As known from Table 2, class IV class water body standard is fully met by the above improved effluent index.
Experiment two:
The example of modification of certain urban wastewater treatment firm.50,000 m for the treatment of scale3/ d, 70% industrial wastewater, 30% in sewage water
For sanitary sewage, biochemistry pool A2O, secondary clarifier effluent can reach level-one emission standard A before being transformed.
First part: by A2O biochemistry pool transform EBR biochemistry pool as, is embodied as in A2EBR is arranged in O biochemistry pool to fill out
Material (loading 35%) can promote rotational flow aeration device, Roots blower, glucose carbon source dosing system (glucose dosage
Ability 35mg/L)；
Second part: it transform former coagulative precipitation tank as magnetic-coagulation sedimentation basin, original filtering cloth filtering pool is retained, in magnetic-coagulation
COD remover 12mg/L, aluminium polychloride 20mg/L, 130 mesh magnetic powders, anionic polyacrylamide 1mg/ are added in sedimentation basin
L。
After transformation, the EBR biochemistry pool water outlet is through original secondary clarifier effluent, the water outlet of magnetic flocculation sedimentation basin, filtering cloth filtering pool+disappear
Malicious pond effluent quality index such as table 3.
Certain sewage treatment plant of table 3 proposes effluent quality index (annual average) unit of formant after mark transformation: mg/L (is indicated
Except)
As known from Table 3, class IV class water body standard is fully met by the above improved effluent index.
By the way that biochemistry pool is transformed and be arranged in the treatment process of traditional urban wastewater treatment firm, sewage discharge is realized
Reach class IV class water body standard comprehensively.Urban wastewater treatment firm is drained by " urban wastewater treatment firm pollutant emission standard "
(GB18918-2002) level-one B or level-one A standard are increased to class IV class water body standard comprehensively.The present invention is not increasing existing dirt
In the case that water treatment plant takes up an area, with the smallest investment and operating cost, town sewage draining is made to be increased to class IV class water comprehensively
Body standard mentions mark.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of urban wastewater treatment method, which is characterized in that in sewage disposal system, which to include:
Sewage conditioning tank, coarse rack, fine fack, setting pot, biochemistry pool, secondary settling tank and the sterilization pool being sequentially communicated,
The biochemistry pool is EBR biochemistry pool, is provided with EBR filler in the biochemistry pool, can promote high efficient aeration system and carbon
Source dosing system；The described method includes:
S1: sewage to be processed flows into after the precipitating of sewage conditioning tank, mixing, dosing, neutralization and pre-acidified processing
Coarse rack；
S2: fine fack is flowed into after the intercepted removal bulky grain suspended matter of coarse rack by step S1 treated sewage；
S3: setting pot is flowed into after the intercepted removal small granular suspended matters of fine fack by step S2 treated sewage；
S4: it carries out flowing into biochemistry pool after sand setting processing by setting pot by step S3 treated sewage；
S5: ammonia nitrogen, removal total nitrogen, nitration denitrification and drop are removed by biochemistry pool by step S4 treated sewage
Solve problem biochemical COD processing after flow into secondary settling tank；
S6: by step S5 treated sewage by the sludge separation of secondary settling tank, mixed liquor clarification, concentration and return activated
Sterilization pool is flowed into after processing；
S7: clear water section is flowed into after the disinfection treatment of sterilization pool by step S6 treated sewage.
2. a kind of urban wastewater treatment method according to claim 1, which is characterized in that further include: magnetic-coagulation sedimentation basin
And filtering cloth filtering pool, the magnetic-coagulation sedimentation basin are arranged between the secondary settling tank and the sterilization pool, the filtering cloth filtering pool is set
It sets between the magnetic-coagulation sedimentation basin, is provided with COD remover, coagulant, magnetic powder and wadding in the magnetic-coagulation sedimentation basin
Solidifying agent.
3. a kind of urban wastewater treatment method according to claim 2, which is characterized in that
The COD remover is powdered carbon and/or diatomite and/or bleaching powder and/or powdery peroxide；
The magnetic powder is natural Fe3O4Magnetic powder, the particle size range of magnetic powder are 100 mesh~300 mesh；
The coagulant is aluminium salt and/or molysite and/or poly-aluminium and/or Polyferric Sulfate；
The flocculant be anionic polyacrylamide and/or cationic polyacrylamide and/or non-ionic polyacrylamide and/
Or food grade polyacrylamide；The dosage of the flocculant is 0.1~5mg/L.
4. a kind of urban wastewater treatment method according to claim 3, which is characterized in that the aluminium salt be aluminum sulfate or
Aluminium chloride；The molysite is ferric sulfate or ferrous sulfate；The poly-aluminium is aluminium polychloride, polyaluminium sulfate or polymerization silicon
Sour aluminium；The Polyferric Sulfate is poly-ferric chloride, bodied ferric sulfate or polyferric silicate sulfate；The dosage of the coagulant is 1~50mg/
L。
5. a kind of urban wastewater treatment method according to claim 2, which is characterized in that the water inlet side of the filtering cloth filtering pool
Formula be it is outer into it is interior go out formula or be inside-admission outside-exit type；The filter cloth material of the filtering cloth filtering pool be fiber filter cloth, polyester-type filter cloth or
Person's stainless steel filtering net.
6. a kind of urban wastewater treatment method according to claim 1, which is characterized in that
The EBR filler is fixed filler and/or floating stuffing, the set amount of the EBR filler be biochemical pool volume 1%~
80%；
The high efficient aeration system that promoted is lift microporous aerator and/or elevated rotational flow aeration device and/or sieve
Thatch air blower and/or centrifugal blower and/or air suspension air blower；
The carbon source dosing system is liquid medicine system and/or powder medicine system；Wherein, in the liquid medicine system
It is methanol and/or ethyl alcohol and/or sodium acetate and/or carbohydrate that liquid, which adds object,.
7. a kind of urban wastewater treatment method according to claim 1, which is characterized in that also set up in the biochemistry pool
Have: the relative density of magnetic powder loading equipemtn, high shearing machine and magnetic powder separator, the magnetic powder loaded in the magnetic powder loading equipemtn is
5.2；
In the step S5, comprising:
S51, ammonia nitrogen, removal total nitrogen, nitration denitrification and the difficult biochemistry of degradation are removed by passing through biochemistry pool in step S5
COD processing after flow into magnetic powder loading equipemtn；
S52, by step S51 treated sewage after the magnetic powder loading processing of magnetic powder loading equipemtn, flow to high shearing machine
And at magnetic powder separator position；
Step 53, by step S52 treated sewage after the recovery processing of the magnetic powder of excessively high shearing machine and magnetic powder separator,
It flow to secondary settling tank.
8. a kind of town sewage treatment system characterized by comprising sewage conditioning tank, coarse rack, the thin lattice being sequentially communicated
Grid, setting pot, biochemistry pool, secondary settling tank and sterilization pool,
The biochemistry pool is EBR biochemistry pool, is provided with EBR filler in the biochemistry pool, can promote high efficient aeration system and carbon
Source dosing system.
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| CN109970289A (en) * | 2019-04-30 | 2019-07-05 | 江苏金博源环保科技有限公司 | A kind of urban wastewater treatment mentions mark advanced treatment process and device |
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| CN113955909A (en) * | 2021-11-05 | 2022-01-21 | 安徽雷克环境科技有限公司 | Method for eluting and purifying offshore deposited pollutants |
| CN114368878A (en) * | 2022-01-14 | 2022-04-19 | 宏伟建设工程股份有限公司 | Energy-saving emission-reducing town sewage treatment system and method |
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Application publication date: 20181228 |
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