CN110078175A - A kind of ultrafiltration and air-floating integral unit and application - Google Patents
A kind of ultrafiltration and air-floating integral unit and application Download PDFInfo
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- CN110078175A CN110078175A CN201910429670.8A CN201910429670A CN110078175A CN 110078175 A CN110078175 A CN 110078175A CN 201910429670 A CN201910429670 A CN 201910429670A CN 110078175 A CN110078175 A CN 110078175A
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- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 61
- 238000007667 floating Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000012528 membrane Substances 0.000 claims abstract description 129
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 64
- 231100000719 pollutant Toxicity 0.000 claims abstract description 64
- 238000000034 method Methods 0.000 claims abstract description 53
- 238000005273 aeration Methods 0.000 claims abstract description 42
- 238000011001 backwashing Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 24
- 239000002351 wastewater Substances 0.000 claims abstract description 16
- 238000005188 flotation Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 7
- 238000004065 wastewater treatment Methods 0.000 abstract description 12
- 230000014759 maintenance of location Effects 0.000 abstract description 10
- 239000007787 solid Substances 0.000 description 24
- 239000007788 liquid Substances 0.000 description 22
- 239000000725 suspension Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 13
- 238000000926 separation method Methods 0.000 description 12
- 239000000356 contaminant Substances 0.000 description 10
- 238000005345 coagulation Methods 0.000 description 7
- 230000015271 coagulation Effects 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000005352 clarification Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000003651 drinking water Substances 0.000 description 3
- 235000020188 drinking water Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000000630 rising effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 206010016807 Fluid retention Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000010828 elution Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 238000001471 micro-filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides a kind of ultrafiltration and air-floating integral unit and application, belongs to field of waste water treatment.Described device includes pond body, hyperfiltration membrane assembly, aerated conduit and Backwash pipeline, the Backwash pipeline is connected with hyperfiltration membrane assembly, described device further includes overflow weir and dissolved air water release pipeline, the overflow weir is arranged in pond body upper surface, the aeration tube road and dissolved air water release pipeline are arranged at below hyperfiltration membrane assembly, release is provided on the dissolved air water release pipeline, the aeration tube is provided with aeration head on road, the present invention also provides a kind of methods for handling waste water, first with the pollutant in hyperfiltration membrane assembly retention waste water, Air Exposure is carried out to hyperfiltration membrane assembly again, it finally carries out backwashing+air-flotation process, finally the pollutant in water body is promoted to the upper surface of pond body, and then it is discharged by overflow.
Description
Technical field
The present invention relates to field of environment protection, more specifically, being related to a kind of ultrafiltration and air-floating integral unit and application.
Background technique
In field of waste water treatment, the membrane technologies such as micro-filtration, ultrafiltration, reverse osmosis have obtained more and more researchs and have answered
With during using ultrafiltration membrane treatment, particle, colloidal solid or macromolecule contaminant in waste water pass through cutting for ultrafiltration membrane
It stays and is attached on ultrafiltration membrane, some of the contaminants are contacted with film occurs physics chemical action or mechanism, needs in backwash stage
Want longer backwashing time that can just be eluted, though the stronger pollutant of some adhewsive actions by increase backwashing time and
Medicament can not make its elution, therefore film surface pollution, fenestra is be easy to cause to shrink, even Pore Blocking, cause membrane flux
Reduce and the separating property of film reduces, causes film that irreversible pollution occurs.Therefore, in dual-membrane process field, occur
At the group technology that membrane filtration effect can much be improved, mitigate fouling membrane, such as electric coagulation-electric floating/immersion ultrafiltration integration
Science and engineering skill, the water treatment technology for integrating clarification, air bearing and ultrafiltration, at coagulation-High-rate sedimentation-air bearing/air lift-film integration
Science and engineering skill etc..
Such as Chinese Patent Application No. CN201010290369.2, authorized announcement date is that the application case on the 23rd of September in 2015 is public
A kind of electric integrated drinking water advanced treatment device of coagulation-electric floating/immersion ultrafiltration has been opened, has been related at a kind of drinking water deep
Manage device.In order to solve to be difficult to effectively when existing ultrafiltration membrane is used as independent process unit to the dissolubility pollutant matter in water
It removes and is used in series the technical issues of will increase process flow length with units such as chemical coagulation, precipitating, air bearings, the Shen
Please case device by distribution reservoir, water distribution tracery wall, purification reaction pond, multiple groups electricity coagulation-electric floating pole plate, multiple groups submerged ultrafiltration
The composition such as component；Electric coagulation-electric floating pole plate and submerged ultrafiltration component are successively vertically arranged in purification reaction pond indirectly.
The present invention combines electric coagulation and immersion ultrafiltration, utilizes the pollutants such as electrode plate removal organic matter, phosphate, benefit
" two worms ", algae, bacterium, the microorganisms such as virus in water removal are gone with ultrafiltration membrane, and separate the wadding body that electric coagulation generates, and pass through association
Same-action achievees the purpose that deepling purification of drinking water.
Chinese Patent Application No. CN201010290369.2, authorized announcement date are that on 2 22nd, 2012 application cases disclose
A kind of water treatment facilities integrating clarification, air bearing and ultrafiltration, the hyperfiltration membrane assembly are symmetricly set on two of pond body
In Disengagement zone, the lower section of hyperfiltration membrane assembly and the bottom in coagulation area are provided with aeration tube, the multiple turbine stirrer front and back
It is uniformly arranged in coagulation area；The turbine stirrer for realizing machinery clarification, the aeration tube for realizing to pond body into
Row aeration, the hyperfiltration membrane assembly are used for ultrafiltration.
Chinese Patent Application No. 201510813124.6, authorized announcement date are that the application case of 2018.01.05 discloses one kind
Coagulation-High-rate sedimentation-air bearing/air lift-film integrated apparatus, including coagulation reactor, shell, external pressing type hollow fibrous membrane group
Part, aeration component, backwashing water water inlet pipe, wadding body delivery pipe, outlet pipe, exhaust pipe and sloping plate deposition component, sloping plate deposition group
Part by the overlapping hollow round table that connects of pile or hollow positive terrace with edge and support bar group at, sloping plate deposition component is arranged along the axial direction of shell,
It is socketed in outside external pressure type hollow fiber membrane component or external pressure type hollow fiber membrane component is socketed in outside sloping plate deposition component.It should
Application case also disclose it is a kind of mitigate fouling membrane method, in raw water dosing coagulant and apply hydraulics carry out coagulation
After processing, air lift/air bearing, precipitating and film filtration treatment are carried out under aeration condition using above-mentioned integrated apparatus.The integration
Although the rupture of wadding body caused by aeration adverse effect caused by film properties can be effectively relieved in device, the cleaning frequency of membrane module is reduced
Rate extends the service life of membrane module.However its principle is to generate shear action in film surface using aeration bubbles, goes to decontaminate
Object is contaminated, while imposing airflow circulating promotion processing, drives water flow to be recycled, disturbed in membrane module, enhances aeration bubbles
Treatment effect extends the cycle of operation of membrane module, and the pollutant after can not cleaning to membrane module in water body separates, therefore
Suspended contaminant stays in water body, and further removal is needed to handle.
Therefore, based on the defect of the prior art, the pollutant after how cleaning to membrane module in water body divides
It leaves away except the problem for being urgent need to resolve.
Summary of the invention
1. the technical issues of solving
It is directed in ultrafiltration in the prior art and air-floating integral unit by the way of aeration and backwash to membrane module
Suspended contaminant stays in water body after surface contaminant processing, and further removal is needed to handle, and of the invention providing is a kind of super
Filter and air-floating integral unit and application method, by the way that aerated conduit and dissolved air water release pipeline is arranged simultaneously below pond body,
It realizes that pollutant is promoted to pond body upper surface, is discharged by overflow, to realize the effect of separation of solid and liquid.
2. technical solution
To achieve the above object, technical solution provided by the invention are as follows:
The present invention provides a kind of ultrafiltration and air-floating integral unit, described device includes pond body, hyperfiltration membrane assembly, aeration
Pipeline and Backwash pipeline, the Backwash pipeline are connected with hyperfiltration membrane assembly, and described device further includes overflow weir and molten gas
Water discharges pipeline, and in pond body upper surface, the aeration tube road and dissolved air water release pipeline are arranged at super for overflow weir setting
Below filter membrane component, it is provided with release on the dissolved air water release pipeline, the aeration tube is provided with aeration head on road.
Aerated conduit, Backwash pipeline and dissolved air water release pipe is arranged in the device of the invention simultaneously below hyperfiltration membrane assembly
Road, aerated conduit and Backwash pipeline are used for the cleaning of ultrafiltration membrane surface pollutant, and dissolved air water release pipeline then passes through and releases
The micro-bubble that device generates high degree of dispersion is put, solid suspension in water body is adhered to, the gas-solid body suspended matter three of water-is formed and mixes
System forms apparent density and is less than the wadding body of water and floats to the water surface, and the overflow weir by the way that pond body surface is arranged in is discharged.
Therefore, the device of the invention can be by solid suspension ultrafiltration retention processing-ultrafiltration Membrane cleaning-Suspended Matter in Water
Disjoint set is integrated, and existing device only by ultrafiltration and backwash+aeration mode by the solid of ultrafiltration membrane surface
Suspended matter is cleaned into water body, can not solid suspension separated with water body, can only by pump will have solid suspension portion
Water distribution component discharge.Then will affect when solid suspension excessive concentration in the water body after ultrafiltration Membrane cleaning wastewater treatment continue into
Row.Therefore, the device of the invention solid suspension can be discharged in time, be conducive to the lasting progress of wastewater treatment.
As further improvement of the present invention, the dissolved air water release pipeline is arranged above aerated conduit.
By dissolved air water release pipeline setting it is upper have both sides purpose, on the one hand due to dissolved air water pipeline generate it is micro-
The rate of climb of minute bubbles is slower than the rate of climb for the air pocket that aeration generates, and top is arranged in and is conducive to quickly mentioning for pollutant
It rises, another aspect aerated conduit is arranged below, and be can use the effect that the shearing for the air pocket that aeration generates is cleaned, is being aerated
Effect can carry out the cleaning of release simultaneously, and release is prevented to be contaminated object blocking.
As further improvement of the present invention, the dissolved air water release pipeline and aerated conduit setting are flat in a level
On face.
As further improvement of the present invention, the present invention provides a kind of hyperfiltration membrane assembly cleaning method, the methods
Include the following steps:
(1) Air Exposure: being passed through pond body for water body, carries out Air Exposure to the water body of hyperfiltration membrane assembly bottom, utilizes exposure
The bubble that gas generates elutes the pollutant of hyperfiltration membrane assembly；
(2) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly, using backwashing water to ultrafiltration membrane group
Pollutant on part is eluted again, and pollutant enters in water body, while discharging dissolved air water in hyperfiltration membrane assembly bottom；It utilizes
The bubble that dissolved air water generates promotes the pollutant in water body to the upper surface of pond body, and then is discharged by overflow.
The pollutant of film surface is sheared first with the air pocket that aeration generates in cleaning method of the invention, is wiped
Washing enables pollutant to elute, and then enters to backwashing water inside ultrafiltration membrane using backwash, and carrying out recoil by inside makes
Pollutant is removed to film surface, is completed removal of the pollutant from film surface using inside and outside double action, is made pollutant
Enter to water body, in backwash stage, dissolved air water carries out air-flotation process simultaneously, due in backwash process backwashing water from outside
Inflow causes the liquid level of pond body to rise, and it is quick that liquid level rose can effectively facilitate progress after pollutant is sticked in micro-bubble entrainment
Rise, is separated by solid-liquid separation eventually by overflow manner.And existing method be then will be after Membrane cleaning by using the pressure of pump
Water body part discharge, effective separation of solid and liquid process can not be carried out.
As further improvement of the present invention, the present invention provides a kind of methods for handling waste water, comprising the following steps:
A) pollutant adsorbs: waste water being passed through pond body, retains the pollutant in useless removal waste water using hyperfiltration membrane assembly；
B) Air Exposure: Air Exposure is carried out to the water body of hyperfiltration membrane assembly bottom, the bubble generated using aeration is to super
Pollutant on filter membrane is eluted；
C) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly, using backwashing water on ultrafiltration membrane
Pollutant is eluted again, while discharging dissolved air water in hyperfiltration membrane assembly bottom；The bubble generated using dissolved air water is by water body
In pollutant be promoted to the upper surface of pond body, pollutant passes through overflow and is discharged；
D) step a) is repeated.
Waste water is passed through pond body by method of the invention, retains removal pollutant using hyperfiltration membrane assembly；It is handled by retention
Water body pond body is discharged by the outlet conduit that is connected to hyperfiltration membrane assembly；
Ultrafiltration Membrane cleaning is carried out again, first with the pollutant for the air pocket removal ultrafiltration membrane surface that aeration generates, then benefit
The pollutant for not removed ultrafiltration membrane surface with backwashing water in backwash process while being discharged molten by backwash removal
Air water carries out air-flotation process, and solid particle present in water body is promoted to pond body surface using micro-bubble, finally by excessive
The mode of stream is discharged, and completes to be separated by solid-liquid separation.
By the present invention be separated by solid-liquid separation in the way of by ultrafiltration retention-ultrafiltration Membrane cleaning-separation of solid and liquid set a to device
It carries out, solid suspension substantially reduces in water body in the pond body after being separated by solid-liquid separation, and the circulation for being conducive to wastewater treatment carries out.
And existing device is clear by the solid suspension of ultrafiltration membrane surface only by ultrafiltration and backwash+aeration mode
It is washed till in water body, can not achieve the separation of solid suspension and water body, can only will have the part of solid suspension by pumping
Water body discharge.Then will affect when solid suspension excessive concentration in the water body after ultrafiltration Membrane cleaning wastewater treatment continue into
Row, the device of the invention solid suspension can be discharged in time, be conducive to the lasting progress of wastewater treatment.
As further improvement of the present invention, the Air Exposure time is 2~3 minutes, when the backwash is handled
Between be 4~6 minutes.
As further improvement of the present invention, the bubble diameter that the dissolved air water generates is 20~40 μm；The aeration
The diameter that gas generates bubble is 100 μm~10mm.
As further improvement of the present invention, the Air Exposure intensity is 10~50L/m2.s。
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, have the following beneficial effects:
(1) ultrafiltration of the invention and air-floating integral unit, dirt of the air pocket generated first with aeration to film surface
Dye object is sheared, cleans pollutant is enable to elute, and then enters to backwashing water inside ultrafiltration membrane using backwash, by
Inside, which carries out recoil, removes pollutant to film surface, completes pollutant from film surface using inside and outside double action
Removal, makes pollutant enter to water body, uses dissolved air water to carry out air-flotation process simultaneously in backwash stage, due to backwash process
Middle backwashing water causes the liquid level of pond body to rise from outside inflow, and the micro-bubble entrainment that can effectively facilitate of liquid level rising is sticked
Rapid increase is carried out after pollutant, is separated by solid-liquid separation eventually by overflow manner.And existing method is then by using pump
Pressure the water body part after Membrane cleaning is discharged, effective separation of solid and liquid process can not be carried out, and the device of the invention is taken up an area
Area is small, and investment, operation are low with maintenance cost, is conducive to promote.
(2) ultrafiltration of the invention and air-floating integral unit dissolved air water release pipeline are arranged above aerated conduit, one
The rate of climb for the micro-bubble that aspect is generated due to dissolved air water pipeline is slower than the rate of climb for the air pocket that aeration generates, setting
Be conducive to the fast lifting of pollutant on top, another aspect aerated conduit is arranged below, and can use the big of aeration generation
The effect that the shearing of bubble is cleaned, the cleaning of release can be carried out in aeration effect simultaneously, prevent release to be contaminated object stifled
Plug.
(3) method of processing waste water of the invention recycles aeration first with hyperfiltration membrane assembly Adsorption pollutant
The air pocket of generation shears the pollutant of film surface, cleans pollutant is enable to elute, and is then made instead using backwash
Flushing water enters to inside ultrafiltration membrane, and carrying out recoil by inside removes pollutant to film surface, utilizes inside and outside pair
Recast makes pollutant enter to water body with removal of the pollutant from film surface is completed, and in backwash stage, dissolved air water is carried out simultaneously
Air-flotation process, since from outside, inflow causes the liquid level of pond body to rise to backwashing water in backwash process, liquid level rising can be with
It effectively facilitates after pollutant is sticked in micro-bubble entrainment and carries out rapid increase, be separated by solid-liquid separation eventually by overflow manner, and
Existing method is then that the water body part after Membrane cleaning is discharged by using the pressure of pump, can not be effectively separated by solid-liquid separation
Process still has more solid suspension to be present in water body, therefore method of the invention can effectively extend ultrafiltration membrane
Service life, guarantee wastewater treatment continuous and effective progress.
Detailed description of the invention
Fig. 1 is the schematic diagram of ultrafiltration of the invention and air-floating integral unit.
In figure, 1, hyperfiltration membrane assembly；2, aerated conduit；3, dissolved air water tank；4, pond body；5, backwashing pump；6, water inlet line；
7, outlet conduit；201, aeration head；301, dissolved air water discharges pipeline；302, release；401, overflow weir；501, backwash tube
Road.
Specific embodiment
For the contents of the present invention are explained further, below with reference to embodiment, the present invention is described in detail.
Embodiment 1
The present invention provides a kind of ultrafiltration and air-floating integral unit, described device includes pond body 4, hyperfiltration membrane assembly 1, exposes
Feed channel 2, backwashing pump 5 and Backwash pipeline 501, the Backwash pipeline 501 are connected with hyperfiltration membrane assembly 1, the dress
Setting further includes overflow weir 401 and dissolved air water release pipeline 301, and the upper surface of pond body 4, the exposure is arranged in the overflow weir 401
Feed channel 2 and dissolved air water release pipeline 301 are arranged at 1 lower section of hyperfiltration membrane assembly, are arranged on the dissolved air water release pipeline 301
There is release 302, aeration head 201 is provided on the aeration tube road 2.
The backwashing pump 5 and Backwash pipeline 501 are for backwashing hyperfiltration membrane assembly 1, the aeration tube road 2
Air Exposure is carried out by water body of the aeration head 201 to 1 lower section of hyperfiltration membrane assembly, dissolved air water release pipeline 301 passes through release
Air bearing of the 302 release micro-bubbles for pollutant in water body.
Dissolved air water release pipeline 301 is arranged above aerated conduit 2, and the purpose of the setting is: on the one hand due to
Dissolved air water pipeline is slower compared to the air pocket that aeration generates by the micro-bubble rate of climb that release generates, and is arranged on top
Be conducive to the fast lifting of pollutant, another aspect aerated conduit 2 is arranged below, and can use the air pocket that aeration generates
The effect cleaned is sheared, the cleaning of release 302 can be carried out simultaneously in aeration effect, prevents contaminated object blocking.
The dissolved air water release pipeline 301 is connected with dissolved air water tank 3, empty by being passed through compression into dissolved air water tank 3
Gas is to generate dissolved air water, and described device further includes water inlet line 6 and outlet conduit 7, and water inlet line 6 outside pond body by being passed through to pond
Body 4, the outlet conduit 7 are connected with hyperfiltration membrane assembly 1, and waste water passes through outlet pipe by the waste water that hyperfiltration membrane assembly 1 is handled
Road 7 is discharged.
Embodiment 2
The present embodiment is substantially same as Example 1, the difference is that: the dissolved air water release pipeline 301 and aeration tube
Road 2 is arranged on a horizontal plane.
Embodiment 3
The present embodiment by the following method, is directed to the ultrafiltration membrane through using after a period of time and is cleaned, is respectively set
Four groups of parallel tests, for studying the influence of different Air Exposure time and backwash processing time to Membrane cleaning effect, institute
Stating Membrane cleaning, steps are as follows:
(1) Air Exposure: being aerated for the water body of 1 bottom of hyperfiltration membrane assembly, is sheared using bubble by ultrafiltration membrane group
Pollutant on part is brought into water body；
(2) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly 1, and water body liquid level rises in pond body 4, benefit
Contaminant remaining on hyperfiltration membrane assembly 1 is rinsed with backwashing water, while discharging dissolved air water in 1 bottom of hyperfiltration membrane assembly；
Pollutant in water body is promoted to pond body upper surface by the dissolved air water, and pollutant is discharged by overflow.
(3) test is divided into four groups, using different Air Exposure time and backwash processing ageing, measured respectively
The ultrafiltration membrane membrane flux of each group before and after the processing, the influence such as table of Air Exposure time and backwash processing time to Membrane cleaning effect
Shown in 1.
1 Air Exposure time of table and backwash processing time influence treatment effect
From journey processed above it can be seen that extension Air Exposure time and backwash+air-flotation process time are conducive to
The recovery of ultrafiltration membrane flux, but the excessively extension reproduction time can not effectively improve membrane flux, to guarantee that ultrafiltration membrane flux is being transported
It is unattenuated during row, can by the Air Exposure time be arranged at 2~3 minutes, while will backwash processing time setting be 4~
6 minutes.
Embodiment 4
A kind of wastewater treatment method is present embodiments provided, described method includes following steps:
(1) ultrafiltration membrane adsorbs: staying water being passed through by water inlet line 6 to pond body 4, by the filtering of a cycle
Retention, the SS value in water body are 433mg/L, and the water body by retention processing passes through the outlet conduit 7 that is connected to hyperfiltration membrane assembly 1
Pond body 4 is discharged；
(2) Air Exposure: being aerated for the water body of 1 bottom of hyperfiltration membrane assembly, is sheared using bubble by ultrafiltration membrane group
Pollutant on part 1 is eluted in water body；The diameter that the aerating gas generates bubble is 100 μm, the Air Exposure time
It is 2 minutes；The Air Exposure intensity is 10L/m2.s。
(3) backwash+air-flotation process: backwashing water is passed through to membrane module 1, and water body liquid level rises in pond body 4, using anti-
Flushing water is rinsed contaminant remaining on hyperfiltration membrane assembly 1, while discharging dissolved air water in 1 bottom of hyperfiltration membrane assembly, described
The bubble diameter that dissolved air water generates is 40 μm；The backwash processing time is 4 minutes.
Pollutant in water body is promoted to pond body upper surface by the dissolved air water, and pollutant is discharged by overflow, air bearing+anti-
Water body SS concentration is 86mg/L in membrane cisterna after flushing.
Embodiment 5
A kind of wastewater treatment method is present embodiments provided, is included the following steps:
(1) ultrafiltration membrane adsorbs: staying water being passed through by water inlet line 6 to pond body, by the filtering of a cycle
Retention, the SS value in water body are 452mg/L, and the water body by retention processing passes through the outlet conduit 7 that is connected to hyperfiltration membrane assembly 1
Pond body 4 is discharged；
(2) Air Exposure: being aerated for the water body of 1 bottom of hyperfiltration membrane assembly, is sheared using bubble by ultrafiltration membrane group
Pollutant on part 1 is eluted in water body；The diameter that the aerating gas generates bubble is 10mm, and the Air Exposure time is
3 minutes, the Air Exposure intensity was 10L/m2.s。
(3) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly 1, and water body liquid level rises in pond body 4, benefit
Contaminant remaining on hyperfiltration membrane assembly 1 is rinsed with backwashing water, while discharging dissolved air water in 1 bottom of hyperfiltration membrane assembly,
The bubble diameter that the dissolved air water generates is 20 μm, and the backwash+air-flotation process time is 6 minutes.
Pollutant in water body is promoted to 4 upper surface of pond body by the dissolved air water, and pollutant is discharged by overflow, and air bearing+
Water body SS concentration is 102mg/L in membrane cisterna after backwash.
Embodiment 6
A kind of wastewater treatment method is present embodiments provided, described method includes following steps:
(1) ultrafiltration membrane adsorbs: staying water being passed through by water inlet line 6 to pond body 4, by the filtering of a cycle
Retention, the SS value in water body are 764mg/L, and the water body by retention processing passes through the outlet conduit 7 that is connected to hyperfiltration membrane assembly 1
Pond body 4 is discharged；
(2) Air Exposure: being aerated for the water body of 1 bottom of hyperfiltration membrane assembly, is sheared using bubble by ultrafiltration membrane group
Pollutant on part 1 is eluted in water body；The diameter that the aerating gas generates bubble is 5mm, and the Air Exposure time is 3
Minute, the Air Exposure intensity is 30L/m2.s。
(3) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly 1, and water body liquid level rises in pond body 4, benefit
Contaminant remaining on hyperfiltration membrane assembly 1 is rinsed with backwashing water, while discharging dissolved air water in 1 bottom of hyperfiltration membrane assembly；
Pollutant in water body is promoted to pond body upper surface by the dissolved air water, and pollutant is discharged by overflow, the backwash processing
Time is 5 minutes, and the bubble diameter that the dissolved air water generates is 30 μm.
Pollutant in water body is promoted to pond body upper surface by the dissolved air water, and pollutant is discharged by overflow, air bearing+anti-
Water body SS concentration is 122mg/L in membrane cisterna after flushing.
Comparative example
This comparative example provides a kind of wastewater treatment method, and described method includes following steps:
(1) ultrafiltration membrane adsorbs: staying water being passed through by water inlet line 6 to pond body 4, according to side in the prior art
Filtering of the method Jing Guo a cycle retains, and the SS value in water body is 452mg/L, carries out retention processing using hyperfiltration membrane assembly 1, passes through
Pond body 4 is discharged by the outlet conduit 7 being connected to hyperfiltration membrane assembly 1 in the water body for crossing retention processing；
(2) Air Exposure: being aerated for the water body of 1 bottom of hyperfiltration membrane assembly, is sheared using bubble by ultrafiltration membrane group
Pollutant on part 1 is eluted in water body；The diameter that the aerating gas generates bubble is 100 μm, the Air Exposure time
It is 2 minutes；
(3) backwash is handled: water body liquid level rises, and is carried out using backwashing water to contaminant remaining on hyperfiltration membrane assembly 1
It rinses, when pump walks 30% membrane cisterna water and restores filter process, water body SS concentration is 301mg/L in membrane cisterna, the backwash processing
Time is 4 minutes.
The SS concentration in water body before and after the processing of table 2
According to table 2, after the device of the invention and method processing, the solid suspension concentration in water body obviously drops
Low, solid suspension only remains 16~23%, and according to the solid suspension for still having 67% in mode water body in the prior art.
It is some specific embodiments of the application above, these embodiments are merely to illustrate the present invention rather than limitation originally
The range of invention.In addition, those skilled in the art can make the present invention each after having read content of the present invention
Kind change or modification, these forms also belong to the scope of the appended claims of the present application.
Claims (9)
1. a kind of ultrafiltration and air-floating integral unit, described device includes pond body (4), hyperfiltration membrane assembly (1), aerated conduit (2)
With Backwash pipeline (501), the Backwash pipeline (501) is connected with hyperfiltration membrane assembly (1), it is characterised in that: the dress
Setting further includes overflow weir (401) and dissolved air water release pipeline (301), and the overflow weir (401) is arranged in pond body (4) upper surface,
The aeration tube road (2) and dissolved air water release pipeline (301) are arranged at below hyperfiltration membrane assembly (1), the dissolved air water release
It is provided on pipeline (301) release (302), aeration head (201) is provided on the aeration tube road (2).
2. ultrafiltration according to claim 1 and air-floating integral unit, it is characterised in that: the dissolved air water discharges pipeline
(301) setting is above aerated conduit (2).
3. ultrafiltration according to claim 1 and air-floating integral unit, it is characterised in that: the dissolved air water discharges pipeline
(301) and aerated conduit (2) is set to same level plane.
4. a kind of hyperfiltration membrane assembly cleaning method, it is characterised in that: the described method comprises the following steps:
(1) Air Exposure: being passed through pond body (4) for water body, carries out Air Exposure to the water body of hyperfiltration membrane assembly (1) bottom, utilizes
The bubble that aeration generates elutes the pollutant of hyperfiltration membrane assembly (1)；
(2) backwash+air-flotation process: backwashing water is passed through to hyperfiltration membrane assembly (1), using backwashing water to hyperfiltration membrane assembly
(1) pollutant on is eluted again, and pollutant enters in water body, while discharging dissolved air water in hyperfiltration membrane assembly (1) bottom；
Pollutant in water body is promoted the upper surface to pond body (4) by the bubble generated using dissolved air water, and then is discharged by overflow.
5. a kind of method for handling waste water, it is characterised in that: waste water is passed through pond body (4) first by the method, utilizes ultrafiltration membrane
Component (1) retains pollutant, is handled according still further to hyperfiltration membrane assembly cleaning method as claimed in claim 4.
6. the method for processing waste water according to claim 5, it is characterised in that: the Air Exposure time is 2~3 points
Clock, the backwash processing time is 4~6 minutes.
7. the method for processing waste water according to claim 6, it is characterised in that: the bubble diameter that the dissolved air water generates is
20~40 μm.
8. the method for processing waste water according to claim 7, it is characterised in that: the aerating gas generates the diameter of bubble
For 100 μm~10mm.
9. the method for processing waste water according to claim 8, it is characterised in that: the Air Exposure intensity is 10~50L/
m2.s。
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