CN109081467A - The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle - Google Patents
The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle Download PDFInfo
- Publication number
- CN109081467A CN109081467A CN201810868976.9A CN201810868976A CN109081467A CN 109081467 A CN109081467 A CN 109081467A CN 201810868976 A CN201810868976 A CN 201810868976A CN 109081467 A CN109081467 A CN 109081467A
- Authority
- CN
- China
- Prior art keywords
- phosphorus
- dephosphorization
- water
- adsorption
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- 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
- C02F2303/16—Regeneration of sorbents, filters
Abstract
The dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization of the present invention, phosphorus recycling method belong to water pollution control and resource regeneration field.Its purpose is to provide one kind easy to operate, high treating effect, the method for realizing the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, reclamation of phosphorus resource that phosphor resource utilizes.Urban wastewater treatment firm tail water dephosphorization of the present invention, phosphorus recovery system include: catchment water dispensing apparatus, adsorption filter, regenerative system, phosphorus crystallization recovery system.The method of the present invention includes the following steps: phosphorus is adsorbed by filtrate when water inlet flows through filter tank；Aeration, washing；Lye flows through filtrate phosphorus desorption；Rich phosphorus recycle of alkali liquor；Crystallization recycling is carried out to the phosphorus in rich phosphorus regeneration lye with calcium salt.The dephosphorization adsorbent material that the present invention uses is iron-based phosphorus absorbent filter medium, has high efficiency of additive capability, and by unique granulating technique, can regenerate reuse, solve the problems, such as the use of dephosphorization adsorbent material, reduce operating cost.
Description
Technical field
The invention belongs to water pollution controls and resource regeneration field, are used for urban wastewater treatment firm tail more particularly to one kind
The system and method for water dephosphorization, phosphorus recycling.
Background technique
Phosphorus in waste water exists with orthophosphates, Quadrafos and organic phosphorus form, due to wastewater source difference, total phosphorus
And various forms of phosphorus content difference are larger.Total phosphorus content is at 3-15mg/L in typical sanitary sewage (in terms of phosphorus)；Fresh
Former sanitary sewage in, it is phosphatic distribution approximately as: orthophosphates 5mg/L (in terms of phosphorus), tripolyphosphate 3mg/L (with
Phosphorus meter), pyrophosphate 1mg/L (in terms of phosphorus) and organic phosphorus < 1mg/L (in terms of phosphorus).
Quadrafos can be hydrolyzed to orthophosphates in acid condition, the pH ranges of most of sanitary sewages in 6.5-8,
Temperature is at 10-20 DEG C, and hydrolytic process is very slow with this condition；It, can be with however, in sewage under the action of bacterium living beings enzyme
Hydrolysis process is greatly speeded up, many condensed phosphates in sanitary sewage have turned to before sewage reaches treatment plant
Orthophosphates.
In addition, all Quadrafos are all converted into orthophosphates in biochemical processing procedure of sewage, there is no polycondensation phosphorus
Hydrochlorate energy remaining is got off.Meanwhile under the action of bacterium, organic phosphorus in sewage is also partially converted into orthophosphates.Due to upper
Reason is stated, during waste water adsorption and dephosphorization, focuses mainly on orthophosphates.It is restricted by the ionization equilibrium of phosphoric acid, orthophosphates
It is ionized in water body, while generating H3PO4、H2PO-4、HPO2 -4And PO3 -4, the concentration distribution of each phosphorus-containing groups is different with pH value,
In the typical sanitary sewage of pH value 6-9, the form that is primarily present is hydrogen phosphate and dihydrogen phosphate.
The absorption concept being previously mentioned during the solid-liquid reaction of adsorption and dephosphorization, the physics that can cover the surface of solids are inhaled
Attached, ion exchange form chemisorption and surface of solids deposition process.Physical absorption occurs over just solid liquid interface, foundation point
The similar principle that mixes between son, active force are molecular separating force.The characteristics of physical absorption is multilayer absorption, and no stringent saturation is inhaled
Attached amount, adsorption isotherm relatively meet Fruendrich equation.Chemisorption or ion exchange may be the single-layer back of solid liquid interface
Answer, it is also possible to the surface layer of solid interior certain depth is reacted, generally can approximation meet monolayer adsorption it is assumed that adsorption isotherm compared with
Meet Langmiur equation.
The real process of adsorption and dephosphorization not only includes physical absorption, but also including chemisorption.For natural adsorbent, generally by
High surface energy and strong adsorptivity cannot be shown in surface of solids aging, and suction-operated relies primarily on its huge specific surface
Product, such absorption is based on physical absorption.For most of artificial synthesized high-efficiency adsorbents, due to artificially having manufactured solid table
The Characteristic Adsorption and ion exchange layer in face, chemisorption are occupied an leading position.
Summary of the invention
The present invention relies on biological phosphate-eliminating difficulty up to standard for current sewage treatment plant, to largely add chemical dephosphorization medicine
Agent leads to costly medicament, influence water outlet SS and coloration, increases various drawbacks such as mud handling capacity, and provides a kind of cities and towns
The method that sewage treatment plant tail water dephosphorization, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle.The present invention is to adsorb to filter with high efficiency filter
Expect that (i.e. APM filtrate) is core, " urban wastewater treatment firm tail water suction of the whole series developed for sewage treatment plant's advanced treating
The method of attached filter tank dephosphorization and phosphorus recycling " (abbreviation PREF technique).
The present invention relates to a kind of urban wastewater treatment firm tail water dephosphorization, phosphorus recovery system, the system comprises: water distribution of catchmenting
Device, multiple adsorption filters, regenerative system, phosphorus crystallization recovery system and water purification outlet；Multiple adsorption filters include first
Adsorption filter and the second adsorption filter；
The water dispensing apparatus that catchments includes water inlet distributing trough and effluent collection slot；The water inlet distributing trough is set to effluent collection
Inside slot；
The regenerative system includes air blower, multiple spray equipments, backwashing pump；Multiple spray equipments include first
Spray equipment and the second spray equipment；
The phosphorus crystallization recovery system includes alkali collecting pit, rich phosphorus alkali liquor storage tank, flocculation crystallization reactor, reuse after regeneration
Alkali liquid tank, calcium salt tank, concentrated base tank；
The water inlet distributing trough upper end is equipped with water inlet pipe, and two sides pass through with the first spray equipment, the second spray equipment respectively
Pipeline communicates, and pipeline is equipped with regulating valve；First spray equipment is located at the first adsorption filter inner upper, and described second
Spray equipment is located at the second adsorption filter inner upper；
First adsorption filter, the second adsorption filter water outlet with alkali collecting pit after effluent collection slot, regeneration
Water inlet is communicated by pipeline, and pipeline is equipped with regulating valve；The water outlet of the effluent collection slot respectively with backwashing pump
Water inlet, water purification outlet are communicated by pipeline, and pipeline is equipped with regulating valve；The water outlet of the backwashing pump respectively with water outlet
It is communicated between pipeline between collecting tank and the first adsorption filter, the second adsorption filter by pipeline, and pipeline is equipped with and adjusts
Valve；
The air blower is communicated with the air inlet of the first adsorption filter, the second adsorption filter bottom respectively；
The water outlet of alkali collecting pit is communicated with the water inlet of rich phosphorus alkali liquor storage tank after the regeneration, and is equipped with the between the two
One chemical pump；The water outlet of the richness phosphorus alkali liquor storage tank is communicated with the water inlet of flocculation crystallization reactor, and is equipped between the two
Second chemical pump；The discharge port of the calcium salt tank is communicated with the water inlet of flocculation crystallization reactor, and is equipped with first between the two
Metering pump；The bottom end of the flocculation crystallization reactor is equipped with discharge port, the calcium phosphate obtained for crystallization to be discharged；The flocculation knot
The water outlet of brilliant reactor is communicated with the water inlet of reuse alkali liquid tank；The water outlet of the reuse alkali liquid tank is sprayed with first respectively
Device, the second spray equipment water inlet communicated by pipeline, and pipeline be equipped with third chemical pump and regulating valve；
The water outlet of the concentrated base tank passes through pipeline phase with the water inlet of the first spray equipment, the second spray equipment respectively
It is logical, and pipeline is equipped with the second metering pump and regulating valve.
Preferably, the dephosphorization absorbent filter medium in the adsorption filter is APM filtrate or other have selection adsorption capacity to phosphorus
Filtrate, wherein APM filtrate is limited by Beijing Shui Hui material resource environmental science and technology Co., Ltd and Beijing Bao Hongrui section environmental science and technology
Company researches and develops jointly, is made using iron-based and rare earth metal to the exclusive and high efficiency of additive capability of phosphorus, is had efficiently to phosphorus in water
Selective adsorption capacity, and then achieve the purpose that purifying water body.
Blocking, back washing strength is big, is easy to break in the presence of being easy for traditional adsorption tower employed in sewage treatment plant's water process
Bad dephosphorization dephosphorization absorbent filter medium, the disadvantages of regeneration effect is undesirable, Shui Hui material resource company independent research adsorption filter, equipped with exposing
Gas backwash and regenerative system guarantee to can avoid filter clogging while effluent quality.
Preferably, the concentration of NaOH is 0.2-0.5M in the upper clear alkali liquor in the reuse alkali liquid tank.
The dephosphorization absorbent filter medium that the present invention uses has very high regeneration efficiency under strongly alkaline conditions, again using lye spray
Raw system regenerates dephosphorization absorbent filter medium, and lye can be utilized efficiently, and regenerated liquid also can be repeated several times use, reduce
Dephosphorization absorbent filter medium regeneration cost.
The phosphorus that the present invention uses crystallizes recovery system, crystallizes regenerated liquid middle and high concentration phosphorus using calcium salt and generates calcium phosphate.
Phosphorus crystallization recovery system is easy to operate, and crystalline rate is high, and effective rate of recovery of phosphorus is high, also drops while realizing resource reclaim
Low system operation cost.
The invention further relates to a kind of urban wastewater treatment firm tail water adsorption and dephosphorization, phosphorus recycle method, the method includes
Following steps:
(1) urban wastewater treatment firm tail water enters in adsorption filter, and the dephosphorization absorbent filter medium in adsorption filter is in tail water
Phosphorus adsorbed, the standard water discharge of adsorption filter discharge, gained is discharged (SS < 5, TP < 0.3)；
(2) it when dephosphorization absorbent filter medium adsorption saturation, first passes through air blower and attached filter tank is aerated, then pass through backwash
Pump washes the dephosphorization absorbent filter medium in adsorption tank, to remove the suspended matter of absorption；
(3) the dephosphorization absorbent filter medium after step (2) aeration, washing is sprayed or is impregnated with concentrated base and regenerated, and is obtained again
Dephosphorization absorbent filter medium and rich phosphorus after life regenerate lye；
(4) calcium salt is added into rich phosphorus regeneration lye and obtains calcium phosphate crystal and upper clear alkali liquor, that is, complete city of the invention
Town sewage treatment plant tail water adsorption and dephosphorization, phosphorus recycling, calcium phosphate crystal use after collecting as phosphate fertilizer.
Preferably, the dephosphorization absorbent filter medium in the adsorption filter is the sale of environmental science and technology Co., Ltd of Beijing Bao Hongrui section
APM filtrate, be common by Beijing Shui Hui material resource environmental science and technology Co., Ltd and Beijing environmental science and technology Co., Ltd of Bao Hongrui section
Research and development, are made the exclusive and high efficiency of additive capability of phosphorus using iron-based and rare earth metal, have efficient selective suction to phosphorus in water
Attached ability, and then achieve the purpose that purifying water body.
Preferably, water scouring water is the water outlet in step (1) in the step (2).
Preferably, the dephosphorization absorbent filter medium after the regeneration that the step (3) obtains is for the phosphorus absorption in step (1).
Preferably, upper clear alkali liquor is adjusted to the content of NaOH to be used for step (3) after 0.2-0.5M in the step (4)
In regeneration to dephosphorization absorbent filter medium.
The dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization of the present invention, phosphorus recycling method with it is existing
Technology the difference is that:
1, the dephosphorization adsorbent material that urban wastewater treatment firm tail water dephosphorization of the present invention, phosphorus recovery system use, which has, efficiently inhales
Attached performance, and by unique granulating technique, reuse can be regenerated, solves the problems, such as the use of dephosphorization adsorbent material, is reduced
Operating cost.
2, urban wastewater treatment firm tail water dephosphorization of the invention, phosphorus recovery system (PREF filtration system) back washing strength
Greatly, the problem of regeneration efficiency filters reduces operating cost.
3, method of the invention has low operating cost, strong shock resistance, goes out compared with chemical floc dephosphorization technique
The stable advantage of other indexs (coloration, SS) of water.
4, method of the invention is not while solution sewage plant phosphorus is up to standard, additionally it is possible to reduce water outlet SS concentration, make to obtain
Water SS is up to standard.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of urban wastewater treatment firm tail water dephosphorization of the present invention, phosphorus recovery system；Wherein, 1- catchments
Water dispensing apparatus, 1A- water inlet distributing trough, 1B- effluent collection slot, the first adsorption filter of 2-, the second adsorption filter of 3-, alkali after 4- regeneration
Collecting pit, 5- richness phosphorus alkali liquor storage tank, 6- flocculation crystallization reactor, 7- reuse alkali liquid tank, 8- calcium salt tank, 9- concentrated base tank, 10- recoil
Wash pump, the first chemical pump of 11-, the second chemical pump of 12-, 13- third chemical pump, the first metering pump of 14-, the second metering pump of 15-,
16- air blower, the first spray equipment of 17-, the second spray equipment of 18-, 19- water purification outlet, 20- ejected wash water outlet.
Specific embodiment
By following embodiment and verification test to urban wastewater treatment firm tail water dephosphorization of the invention, phosphorus recovery system and
The method that adsorption and dephosphorization, phosphorus recycle is further described.
Embodiment 1
The urban wastewater treatment firm tail water dephosphorization of the present embodiment, phosphorus recovery system include: catchment water dispensing apparatus 1, multiple suctions
Attached filter tank, regenerative system, phosphorus crystallize recovery system, water purification outlet 19；Multiple adsorption filters include the first adsorption filter 2 and second
Adsorption filter 3；
The water dispensing apparatus 1 that catchments includes water inlet distributing trough 1A and effluent collection slot (1B)；Distributing trough 1A of intaking is set to water outlet and receives
Collect inside slot (1B)；
Regenerative system includes air blower 16, multiple spray equipments, backwashing pump 10；Multiple spray equipments include the first spray
Device 17 and the second spray equipment 18；
It includes alkali collecting pit 4, rich phosphorus alkali liquor storage tank 5, flocculation crystallization reactor 6, reuse after regeneration that phosphorus, which crystallizes recovery system,
Alkali liquid tank 7, calcium salt tank 8, concentrated base tank 9；
The upper end distributing trough 1A intake equipped with water inlet pipe, two sides are logical with the first spray equipment 17, the second spray equipment 18 respectively
Piping communicates, and pipeline is equipped with regulating valve；First spray equipment 17 is located at 2 inner upper of the first adsorption filter, the second spray
Shower device 18 is located at 3 inner upper of the second adsorption filter；
First adsorption filter 2, the second adsorption filter 3 water outlet with effluent collection slot (1B), regeneration after alkali collecting pit 4
Water inlet communicated by pipeline, and pipeline be equipped with regulating valve；The water outlet of effluent collection slot (1B) respectively with backwashing pump
10 water inlet, water purification outlet 19 are communicated by pipeline, and pipeline is equipped with regulating valve；The water outlet of backwashing pump 10 respectively with
It is communicated between pipeline between effluent collection slot (1B) and the first adsorption filter 2, the second adsorption filter 3 by pipeline, and pipeline
It is equipped with regulating valve；
Air blower 16 is communicated with the air inlet of the first adsorption filter 2,3 bottom of the second adsorption filter respectively；
The water outlet of alkali collecting pit 4 is communicated with the water inlet of rich phosphorus alkali liquor storage tank 5 after regeneration, and is equipped with first between the two
Chemical pump 11；The water outlet of rich phosphorus alkali liquor storage tank 5 is communicated with the water inlet of flocculation crystallization reactor 6, and is equipped with the between the two
Two chemical pumps 12；The discharge port of calcium salt tank 8 is communicated with the water inlet of flocculation crystallization reactor 6, and is equipped with the first meter between the two
Amount pump 14；The bottom end of flocculation crystallization reactor 6 is equipped with discharge port, the calcium phosphate obtained for crystallization to be discharged；Flocculate crystallization reaction
The water outlet of device 6 is communicated with the water inlet of reuse alkali liquid tank 7；The water outlet of reuse alkali liquid tank 7 respectively with the first spray equipment 17,
The water inlet of second spray equipment 18 is communicated by pipeline, and pipeline is equipped with third chemical pump 13 and regulating valve；
The water outlet of concentrated base tank 9 passes through pipeline phase with the water inlet of the first spray equipment 17, the second spray equipment 18 respectively
It is logical, and pipeline is equipped with the second metering pump 15 and regulating valve.
Dephosphorization absorbent filter medium in first adsorption filter 2, the second adsorption filter 3 is APM filtrate, is by Beijing Shui Hui material resource
Environmental science and technology Co., Ltd researches and develops jointly with Beijing environmental science and technology Co., Ltd of Bao Hongrui section, using iron-based and rare earth metal to phosphorus
Exclusive and high efficiency of additive capability and be made, have efficient selective adsorption capacity to phosphorus in water, and then reach the mesh of purifying water body
's.
Blocking, back washing strength is big, is easy to break in the presence of being easy for traditional adsorption tower employed in sewage treatment plant's water process
Bad dephosphorization dephosphorization absorbent filter medium, the disadvantages of regeneration effect is undesirable, Shui Hui material resource company independent research adsorption filter, equipped with exposing
Gas backwash and regenerative system guarantee to can avoid filter clogging while effluent quality.
Upper clear alkali liquor in reuse alkali liquid tank 7 is the NaOH solution that concentration is 0.2-0.5M.
The dephosphorization absorbent filter medium that the present invention uses has very high regeneration efficiency under strongly alkaline conditions, again using lye spray
Raw system regenerates dephosphorization absorbent filter medium, and lye can be utilized efficiently, and regenerated liquid also can be repeated several times use, reduce
Dephosphorization absorbent filter medium regeneration cost.
The phosphorus that the present invention uses crystallizes recovery system, crystallizes regenerated liquid middle and high concentration phosphorus using calcium salt and generates calcium phosphate.
Phosphorus crystallization recovery system is easy to operate, and crystalline rate is high, and effective rate of recovery of phosphorus is high, also drops while realizing resource reclaim
Low system operation cost.
The urban wastewater treatment firm tail water dephosphorization of the present embodiment, phosphorus recovery system working principle are as follows: town sewage first
Processing plant tail water enters the water inlet distributing trough 1A of water dispensing apparatus 1 of catchmenting, then by pipeline respectively enter the first adsorption filter 2,
Second adsorption filter 3, tail water are contacted with the APM filtrate in adsorption filter, and phosphorus is by dephosphorization adsorption material while suspended matter is trapped
Material efficiently removal, water outlet enter effluent collection slot 1B, are then flowed out by water purification outlet 19, and standard water discharge discharge, gained is discharged (SS
< 5, TP < 0.3)；
After the absorption of a period of time, the absorption of APM filtrate basically reaches saturation, stops water inlet, it is right to first pass through air blower 16
First adsorption filter 2, the second adsorption filter 3 are aerated, then by backwashing pump 10, net with storing in effluent collection slot 1B
Water washes the APM filtrate in the first adsorption filter 2, the second adsorption filter 3 and the suspended matter of absorption is removed, backwash
Water is discharged by ejected wash water outlet 20；
After aeration washing, inhaled with the concentrated base (NaOH solution that concentration is 0.2-0.5M) stored in concentrated base tank 9 by first
The first spray equipment 17, the-the second spray equipment 18 being arranged above attached filter tank 2, the second adsorption filter 3 are sprayed to the first absorption filter
Pond 2, the second adsorption filter 3, spray APM filtrate therein, impregnate regeneration, after the completion of regeneration, lye sequentially enters phosphorus
Alkali collecting pit 4 after the regeneration of crystal system, rich phosphorus alkali liquor storage tank 5, flocculation crystallization reactor 6, by the first metering pump 14 to wadding
The calcium salt stored in calcium salt tank 8 is added in solidifying crystallization reactor 6, so that the phosphorus in lye be made to form calcium phosphate knot in conjunction with calcium salt
Brilliant (crystallization can be used as phosphate fertilizer use after collecting), flocculation 6 supernatant liquor of crystallization reactor, which enters in reuse alkali liquid tank 7, to be stored；It returns
It is concentrated base with the liquid main component stored in alkali liquid tank 7, can be mixed with the concentrated base in concentrated base tank 9, for is carried out to APM filtrate
Regeneration.
Embodiment 2
The urban wastewater treatment firm tail water adsorption and dephosphorization of the present embodiment, the method for phosphorus recycling sequentially include the following steps:
(1) urban wastewater treatment firm tail water enters in adsorption filter, and the dephosphorization absorbent filter medium in adsorption filter is in tail water
Phosphorus adsorbed, standard water discharge after absorption discharge, gained is discharged (SS < 5, TP < 0.3)；
(2) it when dephosphorization absorbent filter medium adsorption saturation, first passes through air blower and attached filter tank is aerated, then pass through backwash
Pump washes the dephosphorization absorbent filter medium in adsorption tank, to remove the suspended matter of absorption；
(3) the dephosphorization absorbent filter medium after step (2) aeration, washing is sprayed or is impregnated with concentrated base and regenerated, and is obtained again
Dephosphorization absorbent filter medium and rich phosphorus after life regenerate lye；
(4) calcium salt is added into rich phosphorus regeneration lye and obtains calcium phosphate crystal and upper clear alkali liquor, after calcium phosphate crystal is collected
It is used as phosphate fertilizer, supernatant is concentrated base；
(5) the dephosphorization absorbent filter medium after the regeneration that step (3) obtains is realized for the phosphorus absorption in step (1) to sewage
Circular treatment；
(6) upper clear alkali liquor (main component is concentrated base) is used in step (3) to dephosphorization absorbent filter medium again in step (4)
Raw, also comprehensive save of lye utilizes in advance；
Wherein, the dephosphorization absorbent filter medium in adsorption filter is APM filtrate, has efficient selective adsorption capacity to phosphorus in water,
And then achieve the purpose that purifying water body；Water scouring water is the water outlet in step (1) in step (2).
Treatment effect
Urban wastewater treatment firm tail water dephosphorization of the invention, phosphorus recovery system (PREF system) are suitable for sewage treatment plant end
Water is brought out, phosphorus concentration range is 1-10mg/L.(TP concentration 0.5-2.5mg/L) is discharged for normal secondary sedimentation tank of sewage treatment work,
According to emissions requirements, water outlet be can control in following range:
(1) SS is averagely less than 5mg/L, and TP is averagely less than 0.4mg/L, and maximum is less than 0.5mg/L；
(2) SS is averagely less than 5mg/L, and TP is averagely less than 0.25mg/L, and maximum is less than 0.3mg/L；
(3) SS is averagely less than 5mg/L, and TP is averagely less than 0.15mg/L, and maximum is less than 0.2mg/L.
Processing water outlet requirement is higher, and filter tank thickness is thicker or surface loading is lower.
It is 40cm for normal sewage treatment plant's thickness of filter bed, regeneration frequency is 24-48 hours.
Technology comparison
It is said from broad scope, phosphorus can be divided into two class techniques, including biological phosphate-eliminating and chemical dephosphorization in the removal of sewage plant.It is raw
Object dephosphorization is a kind of phosphorus removing method of relatively economical, but the polyP bacteria due to playing the role of biological phosphate-eliminating is to items such as extraneous dissolved oxygens
Part has higher requirements, so Biological Phosphorus Removal Processes water outlet is usually unable to stably reaching standard (being less than 1mg/L).In response to this, dirty
Water factory takes chemical dephosphorization measure usually to meet demand up to standard.It is analyzed from principle, the absorption of Shui Hui material resource company research and development removes
It phosphorus technology and adds flocculant dephosphorization technique and belongs to chemical dephosphorization, specific comparative analysis is as follows:
It is compared with chemical floc dephosphorization technique:
The basic principle of chemical condensation precipitation method dephosphorization technique is heavy by adding chemical agent formation insoluble phosphate
Then starch is removed from sewage by being separated by solid-liquid separation.Chemical precipitation method technique can be divided into preceding precipitating, synchronization by place is added
Precipitating and rear precipitating add flocculation filtration after biological treatment；It is removed with urban wastewater treatment firm tail water of the invention of the invention
Phosphorus, phosphorus recovery system are as shown in table 1 compared to advantage and disadvantage.
The existing chemical floc dephosphorization technique of table 1 and product comparison of the invention
Technical solution of the present invention and traditional absorption method dephosphorization compare:
Absorption method dephosphorization be using certain porous or bigger serface solid matter in water phosphate anion it is affine
Power realizes the removal of phosphor in sewage.Traditional dephosphorization adsorbent has flyash, steel slag, zeolite, attapulgite, sepiolite and work
Property aluminium oxide etc..There are two bottlenecks for sewage plant phosphorus ligands for traditional absorption method: first is that the absorption property of adsorbent is weaker, face
When higher to sewage effluents phosphorus concentration, adsorption capacity is weaker, and the residence time is too long, it is difficult to promote；Second is that traditional absorbing process
More difficult to meet sewage plant dephosphorization requirement, traditional adsorption filtration technology is higher in reply sewage effluents turbidity, and exists and run mud etc.
When phenomenon, the backwash frequency is excessively high and filtrate cleaning is difficult, it is difficult to promote in sewage plant.Sewage plant moving bed adsorption and dephosphorization system
Technology in adsorbent material technology first is that make a breakthrough, after the synthesis adsorbent material voluntarily researched and developed has high adsorption efficiency, regeneration
The unaffected advantage of adsorption efficiency, and cost is reasonable；Second is that using moving bed technique in absorbing process, revival is improved
Rate, and solve the problems, such as filtrate cleaning.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, protection scope of the present invention is defined by the appended claims.Those skilled in the art is not carrying on the back
Under the premise of from the principle and substance of the present invention, various changes or modifications can be made to these embodiments, but these are changed
Protection scope of the present invention is each fallen with modification.
Claims (8)
1. a kind of urban wastewater treatment firm tail water dephosphorization, phosphorus recovery system, it is characterised in that: urban wastewater treatment firm tail water removes
Phosphorus, phosphorus recovery system include: catchment water dispensing apparatus (1), multiple adsorption filters, regenerative system, phosphorus crystallization recovery system and water purification
It exports (19)；Multiple adsorption filters include the first adsorption filter (2) and the second adsorption filter (3)；
The water dispensing apparatus that catchments (1) includes water inlet distributing trough (1A) and effluent collection slot (1B)；The water inlet distributing trough (1A)
Inside effluent collection slot (1B)；
The regenerative system includes air blower (16), multiple spray equipments, backwashing pump (10)；Multiple spray equipments include
First spray equipment (17) and the second spray equipment (18)；
The phosphorus crystallization recovery system includes alkali collecting pit (4), rich phosphorus alkali liquor storage tank (5), flocculation crystallization reactor after regeneration
(6), reuse alkali liquid tank (7), calcium salt tank (8), concentrated base tank (9)；
The water inlet distributing trough upper end (1A) be equipped with water inlet pipe, two sides respectively with the first spray equipment (17), the second spray equipment
(18) it is communicated by pipeline, and pipeline is equipped with regulating valve；First spray equipment (17) is located in the first adsorption filter (2)
Above portion, second spray equipment (18) is located at the second adsorption filter (3) inner upper；
First adsorption filter (2), the second adsorption filter (3) water outlet with effluent collection slot (1B), regeneration after alkali receive
The water inlet of Ji Chi (4) is communicated by pipeline, and pipeline is equipped with regulating valve；The water outlet of the effluent collection slot (1B) is distinguished
It is communicated with the water inlet of backwashing pump (10), water purification outlet (19) by pipeline, and pipeline is equipped with regulating valve；The backwash
Pump the water outlet pipeline between effluent collection slot (1B) and the first adsorption filter (2), the second adsorption filter (3) respectively of (10)
Between communicated by pipeline, and pipeline be equipped with regulating valve；
The air blower (16) communicates with the air inlet of the first adsorption filter (2), the second adsorption filter (3) bottom respectively；
The water outlet of alkali collecting pit (4) is communicated with the water inlet of rich phosphorus alkali liquor storage tank (5) after the regeneration, and is equipped between the two
First chemical pump (11)；The water outlet of the richness phosphorus alkali liquor storage tank (5) is communicated with the water inlet of flocculation crystallization reactor (6), and
It is equipped with the second chemical pump (12) between the two；The water inlet phase of the discharge port of the calcium salt tank (8) and flocculation crystallization reactor (6)
It is logical, and it is equipped with the first metering pump (14) between the two；The bottom end of flocculation crystallization reactor (6) is equipped with discharge port；The wadding
The water outlet of solidifying crystallization reactor (6) is communicated with the water inlet of reuse alkali liquid tank (7)；The water outlet of the reuse alkali liquid tank (7)
It is communicated respectively with the water inlet of the first spray equipment (17), the second spray equipment (18) by pipeline, and pipeline is equipped with third
Chemical pump (13) and regulating valve；
Water inlet of the water outlet of the concentrated base tank (9) respectively with the first spray equipment (17), the second spray equipment (18) passes through
Pipeline communicates, and pipeline is equipped with the second metering pump (15) and regulating valve.
2. urban wastewater treatment firm tail water dephosphorization according to claim 1, phosphorus recovery system, it is characterised in that: described
Dephosphorization absorbent filter medium in one adsorption filter (2), the second adsorption filter (3) is APM filtrate or other have selection adsorption energy to phosphorus
The filtrate of power.
3. urban wastewater treatment firm tail water dephosphorization according to claim 1, phosphorus recovery system, it is characterised in that: described time
It is 0.2-0.5M with the concentration of NaOH in the upper clear alkali liquor in alkali liquid tank (7).
4. a kind of method of urban wastewater treatment firm tail water dephosphorization, phosphorus recycling, it is characterised in that: the method includes following steps
It is rapid:
(1) urban wastewater treatment firm tail water enters in adsorption filter, and the dephosphorization absorbent filter medium in adsorption filter is to the phosphorus in tail water
It is adsorbed, the standard water discharge discharge of adsorption filter；
(2) it when dephosphorization absorbent filter medium adsorption saturation, first passes through air blower and attached filter tank is aerated, then pass through backwashing pump pair
Dephosphorization absorbent filter medium in adsorption tank is washed；
(3) the dephosphorization absorbent filter medium after step (2) aeration, washing is sprayed or is impregnated with concentrated base and regenerated, after obtaining regeneration
Dephosphorization absorbent filter medium and rich phosphorus regenerate lye；
(4) calcium salt is added into rich phosphorus regeneration lye and obtains calcium phosphate crystal and upper clear alkali liquor, that is, it is dirty to complete cities and towns of the invention
Water treatment plant's tail water adsorption and dephosphorization, phosphorus recycling.
5. the method for urban wastewater treatment firm tail water adsorption and dephosphorization according to claim 4, phosphorus recycling, it is characterised in that:
Dephosphorization absorbent filter medium in the adsorption filter is APM filtrate or other filtrates to the selective adsorption capacity of phosphorus.
6. the method for urban wastewater treatment firm tail water adsorption and dephosphorization according to claim 4, phosphorus recycling, it is characterised in that:
Water scouring water is the water outlet in step (1) in the step (2).
7. the method for urban wastewater treatment firm tail water adsorption and dephosphorization according to claim 4, phosphorus recycling, it is characterised in that:
Dephosphorization absorbent filter medium after the regeneration that the step (3) obtains is for the phosphorus absorption in step (1).
8. the method for urban wastewater treatment firm tail adsorption and dephosphorization according to claim 4, phosphorus recycling, it is characterised in that: institute
It states upper clear alkali liquor in step (4) and is adjusted to the content of NaOH to be used in step (3) to dephosphorization absorbent filter medium after 0.2-0.5M
Regeneration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868976.9A CN109081467A (en) | 2018-08-02 | 2018-08-02 | The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810868976.9A CN109081467A (en) | 2018-08-02 | 2018-08-02 | The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109081467A true CN109081467A (en) | 2018-12-25 |
Family
ID=64833705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810868976.9A Pending CN109081467A (en) | 2018-08-02 | 2018-08-02 | The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109081467A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550774A (en) * | 2019-08-16 | 2019-12-10 | 天津大学 | Sewage plant tail water dephosphorization and nitrogen recovery equipment and recovery method |
| CN111484174A (en) * | 2020-04-08 | 2020-08-04 | 谢小青 | Water body nitrogen removal adsorption phosphorus removal deep purification process |
| CN111892229A (en) * | 2020-07-31 | 2020-11-06 | 江苏启创环境科技股份有限公司 | Method for deeply purifying and efficiently recovering trace phosphorus in biochemical tail water |
| CN112619440A (en) * | 2020-12-28 | 2021-04-09 | 中建一局集团安装工程有限公司 | Ethylenediamine modified lanthanum oxide-PVDF hybrid membrane material and sewage dephosphorization method |
| CN112624436A (en) * | 2021-01-18 | 2021-04-09 | 山东省水利科学研究院 | Phosphorus treatment system and method with zero discharge of wastewater |
| CN113461099A (en) * | 2021-07-22 | 2021-10-01 | 林七妹 | Tail water dephosphorization equipment for urban sewage treatment plant |
| CN113493274A (en) * | 2020-04-08 | 2021-10-12 | 大渊环境技术（厦门）有限公司 | Deep and efficient purification method for water body |
| WO2022267332A1 (en) * | 2021-06-23 | 2022-12-29 | 北京城市排水集团有限责任公司 | Bidirectional flow pulse-based water body phosphorous-removal apparatus and method, and organic nutrient soil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710081A (en) * | 2015-03-18 | 2015-06-17 | 河海大学 | Sewage nitrogen and phosphorus removal method and device |
| CN104971687A (en) * | 2015-07-20 | 2015-10-14 | 北京宝鸿锐科环境科技有限公司 | Efficient compound iron-based phosphorous-removing adsorbent as well as preparation method, application method and regeneration method thereof |
| WO2016159590A1 (en) * | 2015-03-27 | 2016-10-06 | (주)에코데이 | Apparatus for removing and recovering high concentration of nitrogen and phosphorus by using ammonia stripping |
-
2018
- 2018-08-02 CN CN201810868976.9A patent/CN109081467A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710081A (en) * | 2015-03-18 | 2015-06-17 | 河海大学 | Sewage nitrogen and phosphorus removal method and device |
| WO2016159590A1 (en) * | 2015-03-27 | 2016-10-06 | (주)에코데이 | Apparatus for removing and recovering high concentration of nitrogen and phosphorus by using ammonia stripping |
| CN104971687A (en) * | 2015-07-20 | 2015-10-14 | 北京宝鸿锐科环境科技有限公司 | Efficient compound iron-based phosphorous-removing adsorbent as well as preparation method, application method and regeneration method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110550774A (en) * | 2019-08-16 | 2019-12-10 | 天津大学 | Sewage plant tail water dephosphorization and nitrogen recovery equipment and recovery method |
| CN111484174A (en) * | 2020-04-08 | 2020-08-04 | 谢小青 | Water body nitrogen removal adsorption phosphorus removal deep purification process |
| CN113493274A (en) * | 2020-04-08 | 2021-10-12 | 大渊环境技术（厦门）有限公司 | Deep and efficient purification method for water body |
| CN111892229A (en) * | 2020-07-31 | 2020-11-06 | 江苏启创环境科技股份有限公司 | Method for deeply purifying and efficiently recovering trace phosphorus in biochemical tail water |
| CN112619440A (en) * | 2020-12-28 | 2021-04-09 | 中建一局集团安装工程有限公司 | Ethylenediamine modified lanthanum oxide-PVDF hybrid membrane material and sewage dephosphorization method |
| CN112624436A (en) * | 2021-01-18 | 2021-04-09 | 山东省水利科学研究院 | Phosphorus treatment system and method with zero discharge of wastewater |
| WO2022267332A1 (en) * | 2021-06-23 | 2022-12-29 | 北京城市排水集团有限责任公司 | Bidirectional flow pulse-based water body phosphorous-removal apparatus and method, and organic nutrient soil |
| CN113461099A (en) * | 2021-07-22 | 2021-10-01 | 林七妹 | Tail water dephosphorization equipment for urban sewage treatment plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109081467A (en) | The method that the dephosphorization of urban wastewater treatment firm tail water, phosphorus recovery system and adsorption and dephosphorization, phosphorus recycle | |
| US20100243571A1 (en) | Method for adsorption of phosphate contaminants from water solutions and its recovery | |
| CN102964029B (en) | High-concentration ammonia-nitrogen wastewater treatment method for recycling ammonia and nitrogen and system thereof | |
| CN110282783B (en) | Ammonium phosphate chemical wastewater treatment system and method | |
| CN105771916A (en) | Bentonite particles, bentonite particle adsorption column and method for removing phosphorus in natural water body | |
| CN104710081A (en) | Sewage nitrogen and phosphorus removal method and device | |
| CN110560012A (en) | Method for removing phosphorus in water by using resin-loaded hydrated iron oxide | |
| CN101423314A (en) | High efficiency denitrification, phosphorus removal and phosphorus resource recovery composite for urban sewage | |
| CN101381123A (en) | Method for treating ammonia nitrogen waste water containing vanadium using natural clinoptilolite | |
| JP5360764B2 (en) | Method and system for simultaneous recovery of ammonia and phosphorus components in water to be treated | |
| CN102295338A (en) | High-efficiency phosphate removing equipment and use method thereof | |
| CN107487903A (en) | The recovery method of ammonia nitrogen in a kind of livestock breeding wastewater | |
| CN107651811A (en) | A kind of municipal wastewater handling process and device | |
| CN103387301B (en) | Deep purification method for urban sewage | |
| CN202808537U (en) | Town sewage deep treatment system | |
| CN105152267A (en) | Method for deeply removing phosphorus in water by using calcined limonite | |
| CN107324606B (en) | Sewage treatment system and method for recycling iron-rich excess sludge dephosphorization membrane bioreactor | |
| CN102515300B (en) | Roof rainwater forced circulatory filtering, recycling and utilizing device and method | |
| JPH0749116B2 (en) | Phosphorus-containing wastewater treatment method | |
| CN113087063A (en) | Method for deeply removing phosphorus in high-salinity wastewater | |
| CN1485281A (en) | Process of treating ammonia nitrogen waste water by 13X molecular sieve | |
| CN108455795B (en) | Desalting method for fermentation regenerated water | |
| JP3414511B2 (en) | Advanced treatment method for organic wastewater | |
| CN105000618A (en) | Turn-over board moving bed type adsorption phosphorus-removal system | |
| JP3516311B2 (en) | Advanced treatment method and apparatus for organic wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181225 |