CN110002548A - A kind of electrochemistry-membrane-separation water treatment device and its processing method - Google Patents
A kind of electrochemistry-membrane-separation water treatment device and its processing method Download PDFInfo
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- CN110002548A CN110002548A CN201910319679.3A CN201910319679A CN110002548A CN 110002548 A CN110002548 A CN 110002548A CN 201910319679 A CN201910319679 A CN 201910319679A CN 110002548 A CN110002548 A CN 110002548A
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F1/44—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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- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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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
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- General Chemical & Material Sciences (AREA)
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Abstract
The present invention provides a kind of electrochemistry-membrane-separation water treatment device and its processing methods, described device includes reaction tank, membrane module is set in the reaction tank, film in the membrane module is conductive film, the side of the membrane module is parallel to membrane module setting anode plate, and the membrane module is connect as cathode plate and the anode plate with external power supply；The reaction tank main body is equipped with inlet and outlet, and the outlet of the membrane module is connected with the water outlet reacted on tank main body.The present invention is by combining electrochemistry and membrane separating process, polluted-water is pre-processed by electroxidation or electric flocculation effect, form pollutant cake layer, again using the membrane module with conductive film as cathode, degradation of contaminant, achieve the effect that Membrane cleaning while decelerating membrane pollution, extend the service life of film, improves the service life of film；The separative efficiency for improving water pollutant simultaneously, improves the water quality of water outlet.
Description
Technical field
The invention belongs to water-treatment technology field, it is related to a kind of electrochemistry-membrane-separation water treatment device and its processing method.
Background technique
Membrane separation technique one is increasingly extensive water treatment technology is applied in recent years, mainly wrap by common membrane separation technique
Include micro-filtration, ultrafiltration, nanofiltration, reverse osmosis etc..Membrane separation technique is using physics sieve effect to the pollutant for being greater than membrane pore size
It is retained, but simultaneously as the pollutant retained microorganism in the accumulation of film surface and water body is held in the growth of film surface
The decline for easily causing effluent flux influences the normal operation of membrane module, reduces the service life of film, improves membrane separation technique
Application cost.Therefore, it takes suitable preprocess method to handle waste water, alleviates fouling membrane, be that membrane separation technique is applied successfully
Important leverage.
Currently, electrochemical process is a kind of research and application than wide, especially in going water removal in terms of hardly degraded organic substance
With the water treatment technology for comparing outstanding advantage.Wherein, electric flocculation, electroxidation, electric Fenton are common electro-chemical water processing sides
Method is applied to one of pretreatment, and the emphasis studied at present before UF membrane to waste water.Electric flocculation is with aluminium, iron etc.
Metal is anode, and when being powered, anodic solution generates ion, then through processes such as a series of hydrolysis, polymerizations, forms complex compound, pass through
Electrochemical parameter and physical and chemical properties of water are controlled, makes the flocculating settings such as colloidal substance, the suspended particulate in water, facilitates subsequent
The progress of membrane separating process.Electroxidation is adjusted in electro-oxidation process by control electrochemical parameter and physical and chemical properties of water
Response path and reaction rate, are divided into direct oxidation and indirect oxidation, and direct oxidation is pollutant in electrode surface generation electrification
Learn oxidation reaction；Indirect oxidation is to make to generate the stronger free radical of activity or molecule in solution, passes through free-radical oxidation organic matter.
Electrochemistry combined with membrane separation technique be improving water treatment system an important directions.Currently, by electrochemistry
Means and membrane separation technique are integrated into a device, pre-process pollutant decelerating membrane pollution.CN207435111U discloses one
Kind electrochemical process-submerged membrane separates integrated water processing device, including electric flocculation/electrocatalytic oxidation/electro-Fenton reaction area, submergence
Formula membrane separation zone and decanting zone, electric flocculation/electrocatalytic oxidation/electro-Fenton reaction area and submerged membrane Disengagement zone are located at reactor
Top is separated two regions using partition, and the lower part of the two is decanting zone, and the two is communicated with decanting zone.CN
107459106A discloses a kind of electrochemistry-membrane-separation water treatment device, and device includes reaction tank, and film group is arranged in reaction tank
Part, the membrane module side is parallel to membrane module setting induction electrode from inside to outside and anode plate, the other side are parallel to membrane module
Cathode plate is set, and the outlet of reactor is connected with membrane module.Although above-mentioned apparatus can first carry out electrochemical treatments to waste water,
The precipitating particulate matter that electrochemical treatments generate is easy to deposit to film surface blocking fenestra, causes the decline of membrane flux, while electrification
It learns in operating process, the pH value of solution easily changes, and influences the existence form of water intermediate ion etc., is unfavorable for the normal of water process
It carries out.
In conclusion the combination of electrochemistry-membrane separation technique also needs to make improvements, it is being capable of the same of efficient process waste water
When, have stronger antifouling property, extends the service life of film.
Summary of the invention
In view of the problems of the existing technology, the purpose of the present invention is to provide a kind of electrochemistry-water separating membrane processing dresses
It sets and its electrochemistry and membrane separating process integrated combination is passed through electroxidation and electric flocculation effect pair by processing method, the present invention
Staying water is pre-processed, and forms pollutant cake layer, then using the membrane module with conductive film as cathode, utilize electrostatic
Repel and hinder pollutant attachment, generates active material degradation of contaminant using electroreduction in situ, reached while decelerating membrane pollution
To the effect of Membrane cleaning.
To achieve this purpose, the present invention adopts the following technical scheme:
On the one hand, the present invention provides a kind of electrochemistry-membrane-separation water treatment device, described device includes reaction tank, institute
It states and membrane module is set in reaction tank, the film in the membrane module is conductive film, and the side of the membrane module is parallel to membrane module and sets
Anode plate is set, the membrane module is connect as cathode plate and the anode plate with external power supply；
The reaction tank main body exports and reacts going out on tank main body equipped with inlet and outlet, the membrane module
The mouth of a river is connected.
Of both membrane module plays the role of in the present invention, in described device, be membrane separating process handle water body must
Device is needed, while it is used as the cathode of electrochemical appliance again, under external power supply effect, is made with anode plate by electrode reaction
Pollutant flocculation or oxidation in water body, electric flocculation effect can regulate and control flocculu shape and structure, reduce pollutant in film surface
Accumulation, electrode reaction control the directly or indirectly oxidation of pollutant, change the molecular structure and polarity of pollutant, in film surface shape
At high pore structure and hydrophilic cake layer.And as cathode oxygen reduction reaction can occur thereon for membrane module, generate dioxygen
The oxidizing components such as water further degrade to the pollutant on film, play the role of situ cleaning, reduce fouling membrane, prolong
Long film uses the time.
It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through
Following technical scheme can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, the membrane module and anode plate as cathode plate is independently at least one
It is a, such as one, two, three or four etc., the selection of quantity is related with the size of device and sewage quantity to be processed.
Preferably, the membrane module is identical with the quantity of anode plate, is successively alternately arranged in reaction tank.
In the present invention, cathode plate and anode plate are arranged in groups, the corresponding anode plate of a cathode plate.
As currently preferred technical solution, the material of film is carbon material, metal material or conduction in the membrane module
Any one in polymer material or at least two combination, the combination is typical but non-limiting example has: carbon material and gold
Belong to the combination of material, the combination of metal material and conducting polymer materials, carbon material, metal material and conducting polymer materials
Combination etc..
In the present invention, selected membrane material is conducting membrane material, when membrane module, that is, cathode plate has multiple, in different membrane modules
Membrane material different types may be selected；Wherein, carbon material includes carbon felt, carbon cloth, graphite etc., and metal material includes POROUS TITANIUM
Plate, stainless steel etc., conducting polymer materials include polyaniline, polypyrrole etc..
Preferably, the film in the membrane module includes any one in microfiltration membranes, ultrafiltration membrane or nanofiltration membrane or at least two
Combination, the combination is typical but non-limiting example has: the group of the combination of microfiltration membranes and ultrafiltration membrane, ultrafiltration membrane and nanofiltration membrane
It closes, microfiltration membranes, ultrafiltration membrane and combination of nanofiltration membrane etc..
Preferably, the membrane module is plate type membrane component and/or hollow fiber form membrane module.
As currently preferred technical solution, the anode plate is metal electrode or metal oxide electrode.
Preferably, the metal electrode includes aluminium electrode and/or iron electrode.
Preferably, the metal oxide electrode includes RuO2、IrO2、SnO2、Ta2O5Or MnO2In any one or at least
Two kinds of combination, the combination is typical but non-limiting example has: RuO2And IrO2Combination, SnO2And MnO2Combination, RuO2、
IrO2And SnO2Combination, SnO2、Ta2O5And MnO2Combination etc..
In the present invention, the anode material of selection is different, and the electrochemical process occurred would also vary from, and works as selection
When aluminium, iron electrode, when electrode reaction, is oxidized to ion, and facile hydrolysis forms hydroxide colloid in the solution for aluminium, iron ion,
Suspended particulate substance under electric field action in absorption effluent, coagulation form precipitating；When selecting above-mentioned metal oxide electrode, due to
It can produce free radical or group with hydroxide ability, such as hydroxyl radical free radical when its electrode reaction, aoxidize the pollution in water
Object changes the polarity of contaminant molecule, and the cake layer that contaminants are formed has higher hydrophily, alleviates fouling membrane mistake
Journey.
As currently preferred technical solution, induction electrode is equipped between the membrane module and anode plate.
Preferably, the induction electrode is aluminium electrode or iron electrode, and the anode plate is metal oxide electrode.
In the present invention, in order to accelerate the processing speed and pollutants removal rate of sewage, setting sense between a cathode and an anode
Electrode is answered, induction electrode selects metal electrode, and anode plate selects metal oxide electrode at this time, by electroxidation and electric flocculation process
It is coupled to the same electrochemical reaction system, the two has synergistic effect to the regulation of the forming process of cake layer, improves filter cake
The surface porosity factor of layer increases the quantity in duct in cake layer；The hydrophily for enhancing filter cake layer surface simultaneously plays and slows down film dirt
Dye, improves the effect of water flux.
As currently preferred technical solution, opposite water inlet side is equipped with water return outlet on the reaction tank main body.
Preferably, the external power supply is DC power supply.
Preferably, described device further includes power-equipment, and the power-equipment is connect with membrane module, wherein optional power
Equipment has peristaltic pump or vacuum pump.
On the other hand, the present invention provides a kind of methods using above-mentioned processing unit processing sewage, which comprises
(1) treatment sewage is passed through reaction tank, starts processing unit, adjust electrochemical parameter and UF membrane parameter, into
Row electric flocculation and/or electro-oxidation process form pollutant cake layer on membrane module surface；
(2) occur electrode reaction on membrane module, then degradation of contaminant carries out film filtration treatment, treated water body from
The discharge of reaction tank water outlet.
In the present invention, water process is carried out using described device, under electric field action, oxidation reaction occurs for anode, generation
Ion or free radical, pollutant are degraded, and the structure and polarity of molecule are changed, and pollutant flocculates to cathode and assembles in electric field,
Oxygen reduction reaction occurs on cathode simultaneously, generates hydrogen peroxide isoreactivity molecule, the pollutant for aggregation of degrading avoids pollution object blocking
Fenestra causes serious fouling membrane.
As currently preferred technical solution, step (1) described electrochemical parameter are as follows: adjust current density be 2~
10A/m2, such as 2A/m2、4A/m2、6A/m2、8A/m2Or 10A/m2Deng it is not limited to cited numerical value, the numerical value model
Other unlisted numerical value are equally applicable in enclosing.
As currently preferred technical solution, step (1) the UF membrane parameter are as follows: adjust transmembrane pressure be 30~
100kPa, such as 30kPa, 40kPa, 50kPa, 60kPa, 80kPa or 100kPa etc., it is not limited to cited numerical value,
Other unlisted numerical value are equally applicable in the numberical range.
In the present invention, by adjusting electrochemical parameter and UF membrane parameter, can control the aperture of the cake layer to be formed with
The distribution in hole guarantees to retain pollutant while water penetration.
Preferably, step (2) the film filtering carries out under power-equipment driving.
As currently preferred technical solution, step (2) is described treated water body returns to reaction tank through water return outlet, then
Secondary processing is until qualified discharge.
In the present invention, described device is used for the processing of water body, is mainly used for the purification process of sewage, is allowed to qualified discharge；
Processing accuracy of the present invention is higher simultaneously, can be used for the processing of drinking water.
Compared with prior art, the invention has the following advantages:
(1) device of the present invention makees electrochemistry and membrane separating process integrated combination by electroxidation or electric flocculation
It is pre-processed with to staying water, the pollutant cake layer of formation is loose porous, then is made with the membrane module with conductive film
For cathode, degradation of contaminant achievees the effect that Membrane cleaning while decelerating membrane pollution；
(2) present invention can simplify the structure composition of device using conductive film as electrode, accelerate the processing speed of sewage；
(3) electric flocculation effect can regulate and control flocculu shape and structure in the present invention, reduce pollutant in the accumulation of film surface；
Electroxidation can change the molecular structure and polarity of pollutant, form high pore structure and hydrophilic cake layer in film surface.
Detailed description of the invention
Fig. 1 is electrochemistry-membrane-separation water treatment device structural schematic diagram that the embodiment of the present invention 1 provides；
Wherein, 1- anode plate, 2- membrane module, 3- reaction tank, 4- water inlet, 5- water return outlet, 6- water outlet, the external electricity of 7-
Source.
Specific embodiment
In order to better illustrate the present invention, be easy to understand technical solution, below the present invention is described in more detail.But it is following
Embodiment be only simple example of the invention, represent or limit the scope of the present invention, the present invention protect model
It encloses and is subject to claims.
Specific embodiment of the invention part provides a kind of electrochemistry-membrane-separation water treatment device and its processing method,
Described device includes reaction tank 3, and membrane module 2 is arranged in the reaction tank 3, and the film in the membrane module 2 is conductive film, the film
The side of component 2 is parallel to membrane module 2 and is arranged anode plate 1, the membrane module 2 as cathode plate and the anode plate 1 with it is external
Power supply 7 connects；
3 main body of reaction tank is equipped with water inlet 4 and water outlet 6, the outlet and 3 main body of reaction tank of the membrane module 2
On water outlet 6 be connected.
The described method includes:
(1) treatment sewage is passed through reaction tank 3, starts processing unit, adjust electrochemical parameter and UF membrane parameter, into
Row electric flocculation and/or electro-oxidation process form pollutant cake layer on 2 surface of membrane module；
(2) occur electrode reaction on membrane module 2, then degradation of contaminant carries out film filtration treatment, treated water body from
The water outlet 6 of reaction tank 3 is discharged.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1:
Present embodiments provide a kind of electrochemistry-membrane-separation water treatment device, the structural schematic diagram of described device such as Fig. 1 institute
Show, including reaction tank 3, membrane module 2 is arranged in the reaction tank 3, and membrane module 2 is hollow fiber form membrane module, and film therein is
Conductive film, conducting membrane material are carbon material.
The side of the membrane module 2 is parallel to membrane module 2 and is arranged anode plate 1, and the membrane module 2 is as cathode plate and described
Anode plate 1 is connect with external power supply 7.
3 main body of reaction tank is equipped with water inlet 4 and water outlet 6, the outlet and 3 main body of reaction tank of the membrane module 2
On water outlet 6 be connected；Opposite 4 side of water inlet is equipped with water return outlet 5 in 3 main body of reaction tank.
The membrane module 2 and anode plate 1 are two, are successively alternately arranged in reaction tank 3；The anode plate 1 is aluminium
Electrode.
Described device further includes power-equipment, and the power-equipment is vacuum pump, is connect with membrane module 2.
Embodiment 2:
A kind of electrochemistry-membrane-separation water treatment device is present embodiments provided, described device includes reaction tank 3, described anti-
It answers and membrane module 2 is set in pond 3, membrane module 2 is plate type membrane component, and film therein is conductive film, and conducting membrane material is POROUS TITANIUM PLATE.
The side of the membrane module 2 is parallel to membrane module 2 and is arranged anode plate 1, and the membrane module 2 is as cathode plate and described
Anode plate 1 is connect with external power supply 7.
3 main body of reaction tank is equipped with water inlet 4 and water outlet 6, the outlet and 3 main body of reaction tank of the membrane module 2
On water outlet 6 be connected；Opposite 4 side of water inlet is equipped with water return outlet 5 in 3 main body of reaction tank.
The membrane module 2 and anode plate 1 are one；Induction electrode, sun are equipped between the membrane module 2 and anode plate 1
Pole plate 1 is RuO2Electrode, induction electrode are iron electrode.
Described device further includes power-equipment, and the power-equipment is peristaltic pump, is connect with membrane module 2.
Embodiment 3:
A kind of electrochemistry-membrane-separation water treatment device is present embodiments provided, described device includes reaction tank 3, described anti-
It answers and membrane module 2 is set in pond 3, the side of the membrane module 2 is parallel to membrane module 2 and anode plate 1,2 conduct of membrane module is arranged
Cathode plate and the anode plate 1 connect 7 with external power supply.
3 main body of reaction tank is equipped with water inlet 4 and water outlet 6, the outlet and 3 main body of reaction tank of the membrane module 2
On water outlet 6 be connected；Opposite 4 side of water inlet is equipped with water return outlet 5 in 3 main body of reaction tank.
The membrane module 2 and anode plate 1 are three, are successively alternately arranged in reaction tank 3；The wherein anode plate 1
In, one is aluminium electrode, and one is RuO2Electrode, the last one is IrO2-MnO2Combination electrode；Membrane module 2 is hollow fiber form
Membrane module, in the membrane module 2, one is PAn conducting membrane, and one is polypyrrole conductive film, the other is stainless steel membrane.
Described device further includes power-equipment, and the power-equipment is vacuum pump, is all connected with membrane module 2.
Embodiment 4:
A kind of electrochemistry-water separating membrane processing method is present embodiments provided, the method is in 1 described device of embodiment
It carries out, comprising the following steps:
(1) reaction tank 3, starting processing dress are passed through as simulation sewage for the bovine serum albumin solution of 100ppm using concentration
It sets, adjusting current density is 10A/m2, transmembrane pressure 30kPa carries out electric flocculation process, in the formation pollution of 2 surface of membrane module
Object cake layer；
(2) electrode reaction occurs on membrane module 2, then degradation of contaminant carries out film filtration treatment under vacuum pump driving,
Treated, and water body is discharged from reaction tank water outlet 6.
In the present embodiment, 30min is handled using the above method, when the simulation sewage is oxygen saturated solution, finally
Membrane flux be initial membrane flux 82.7%；
And when the simulation sewage is nitrogen saturated solution, final membrane flux is the 75.3% of initial membrane flux.
Embodiment 5:
A kind of electrochemistry-water separating membrane processing method is present embodiments provided, the method is in 2 described device of embodiment
It carries out, comprising the following steps:
(1) it is simulation sewage with the solution that the sodium chloride of the kaolin of 50ppm, the humic acid of 5ppm and 50mM forms, leads to
Enter reaction tank 3, start processing unit, adjusting current density is 2A/m2, transmembrane pressure 60kPa carries out electric flocculation and electroxidation
Process forms pollutant cake layer on 2 surface of membrane module；
(2) electrode reaction occurs on membrane module 2, then degradation of contaminant carries out film filtration treatment under peristaltic pump driving,
Treated, and water body is discharged from reaction tank water outlet 6.
In the present embodiment, 30min is handled using the above method, when the simulation sewage is oxygen saturated solution, finally
Membrane flux be initial membrane flux 69.0%；
And when the simulation sewage is nitrogen saturated solution, final membrane flux is the 62.2% of initial membrane flux.
Embodiment 6:
A kind of electrochemistry-water separating membrane processing method is present embodiments provided, the method is in 3 described device of embodiment
It carries out, comprising the following steps:
(1) reaction tank 3, starting processing dress are passed through as simulation sewage for the bovine serum albumin solution of 100ppm using concentration
It sets, adjusting current density is 5A/m2, transmembrane pressure 100kPa carries out electric flocculation and electro-oxidation process, on 2 surface of membrane module
Form pollutant cake layer；
(2) electrode reaction occurs on membrane module 2, then degradation of contaminant carries out film filtration treatment under vacuum pump driving,
Treated, and water body is discharged from reaction tank water outlet 6.
In the present embodiment, 30min is handled using the above method, when the simulation sewage is oxygen saturated solution, finally
Membrane flux be initial membrane flux 72.4%；
And when the simulation sewage is nitrogen saturated solution, final membrane flux is the 66.5% of initial membrane flux.
The above results show include conductive film membrane module as cathode, it is anti-by the way that electrode occurs under power supply effect
It answers, slowed down the formation of cake layer using electrostatic repulsion of the electrode to pollutant before this, and formed after cake layer, due to electricity
Chemical action keeps the filter cake layer porosity to be formed high, and good hydrophilic property can keep relatively high flux；And oxygen can also be in solution
Reduction reaction occurs for cathode, generates the oxidizing components such as hydrogen peroxide, plays the cake layer in situ that clears the pollution off, to extend
The service life of membrane module.
Comparative example 1:
This comparative example provides a kind of electrochemistry-membrane-separation water treatment device and method, and described device is referring in embodiment 1
Structure, difference is only that: the film of the membrane module 2 is non-conductive film, parallel in the other side of 2 opposite anode plate 1 of membrane module
Cathode plate is set, and cathode plate is graphite electrode.
The method is only that referring to the method in embodiment 4, difference: it is anti-that electrode does not occur on membrane module 2 in step (2)
It answers.
In this comparative example, after the simulation sewage equally handles 30min, final membrane flux is only initial membrane flux
23.5%, due to that can not react on membrane module, do not have electrostatic repulsion, after electrochemical treatments, film to pollutant
The cake layer on surface can seriously affect the flux of film, and fouling membrane is serious.
Comparative example 2:
This comparative example provides the processing unit and method of a kind of water separating membrane, and described device is referring to the knot in embodiment 1
Structure, the method are only that referring to the method in embodiment 4, difference: no power on membrane module only carries out film filtering.
In this comparative example, after same processing 30min, final membrane flux is only the 17.6% of initial membrane flux, is far below
Data in embodiment 4, when showing without electrochemical process, the antifouling property of film is poor.
Can be seen that based on the above embodiments with comparative example the present invention by the way that electrochemistry and membrane separating process are combined,
Staying water is pre-processed by electroxidation or electric flocculation effect, forms pollutant cake layer, then with conductive film
Membrane module as cathode, degradation of contaminant achievees the effect that Membrane cleaning while decelerating membrane pollution, extend film using week
Phase improves the service life of film；The separative efficiency for improving water pollutant simultaneously, improves the water quality of water outlet.
The Applicant declares that the present invention is explained by the above embodiments detailed device and method of the invention, but the present invention
It is not limited to above-mentioned apparatus and method, that is, does not mean that the present invention must rely on above-mentioned apparatus and method and could implement.It is affiliated
Those skilled in the art are it will be clearly understood that any improvement in the present invention, to the equivalence replacement and assisted parts of apparatus of the present invention
Addition, selection of concrete mode of part etc., all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of electrochemistry-membrane-separation water treatment device, which is characterized in that described device includes reaction tank, in the reaction tank
Membrane module is set, and the film in the membrane module is conductive film, and the side of the membrane module is parallel to membrane module setting anode plate, institute
Membrane module is stated as cathode plate and the anode plate to connect with external power supply；
The reaction tank main body is equipped with inlet and outlet, the water outlet for exporting with reacting on tank main body of the membrane module
It is connected.
2. processing unit according to claim 1, which is characterized in that the membrane module and anode plate as cathode plate is only
On the spot it is at least one；
Preferably, the membrane module is identical with the quantity of anode plate, is successively alternately arranged in reaction tank.
3. processing unit according to claim 1 or 2, which is characterized in that the material of film includes carbon materials in the membrane module
Any one in material, metal material or conducting polymer materials or at least two combination；
Preferably, the film in the membrane module includes the group of any one in microfiltration membranes, ultrafiltration membrane or nanofiltration membrane or at least two
It closes；
Preferably, the membrane module is plate type membrane component and/or hollow fiber form membrane module.
4. processing unit according to claim 1-3, which is characterized in that the anode plate is metal electrode or gold
Belong to oxide electrode；
Preferably, the metal electrode includes aluminium electrode and/or iron electrode；
Preferably, the metal oxide electrode includes RuO2、IrO2、SnO2、Ta2O5Or MnO2In any one or at least two
Combination, preferably RuO2。
5. processing unit according to claim 1-4, which is characterized in that set between the membrane module and anode plate
There is induction electrode；
Preferably, the induction electrode is aluminium electrode or iron electrode, and the anode plate is metal oxide electrode.
6. processing unit according to claim 1-5, which is characterized in that opposite water inlet on the reaction tank main body
Mouth side is equipped with water return outlet；
Preferably, the external power supply is DC power supply；
Preferably, described device further includes power-equipment, and the power-equipment is connect with membrane module.
7. a kind of processing method using any one of the claim 1-6 processing unit, which is characterized in that the method packet
It includes:
(1) treatment sewage is passed through reaction tank, starts processing unit, adjust electrochemical parameter and UF membrane parameter, carry out electricity
Flocculation and/or electro-oxidation process form pollutant cake layer on membrane module surface；
(2) occur electrode reaction on membrane module, then degradation of contaminant carries out film filtration treatment, treated water body is from reaction
The discharge of pond water outlet.
8. processing method according to claim 7, which is characterized in that step (1) described electrochemical parameter are as follows: adjust electric current
Density is 2~10A/m2。
9. processing method according to claim 7 or 8, which is characterized in that step (1) the UF membrane parameter are as follows: adjust
Transmembrane pressure is 30~100kPa；
Preferably, step (2) the film filtering carries out under power-equipment driving.
10. according to the described in any item processing methods of claim 7-9, which is characterized in that step (2) is described treated water body
Reaction tank is returned to through water return outlet, processing is until qualified discharge again.
Priority Applications (1)
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| CN110921785A (en) * | 2019-11-13 | 2020-03-27 | 河海大学 | Electric filtration catalysis persulfate water treatment equipment and method for treating water by using same |
| CN111943408A (en) * | 2020-08-19 | 2020-11-17 | 北京师范大学 | Device and method for removing organic pollutants in water through electro-catalytic ozone adsorption membrane filtration |
| CN112939293A (en) * | 2021-02-02 | 2021-06-11 | 北京市水科学技术研究院 | Advanced treatment system and advanced treatment method for reclaimed water |
| CN114275963A (en) * | 2021-08-27 | 2022-04-05 | 东北电力大学 | Electric flocculation-self-cleaning membrane wastewater treatment device |
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| CN110921785B (en) * | 2019-11-13 | 2021-10-19 | 河海大学 | Electric filtration catalysis persulfate water treatment equipment and method for treating water by using same |
| CN111943408A (en) * | 2020-08-19 | 2020-11-17 | 北京师范大学 | Device and method for removing organic pollutants in water through electro-catalytic ozone adsorption membrane filtration |
| CN112939293A (en) * | 2021-02-02 | 2021-06-11 | 北京市水科学技术研究院 | Advanced treatment system and advanced treatment method for reclaimed water |
| CN114275963A (en) * | 2021-08-27 | 2022-04-05 | 东北电力大学 | Electric flocculation-self-cleaning membrane wastewater treatment device |
| CN114315955A (en) * | 2021-12-28 | 2022-04-12 | 吉林大学 | Protein purification device and method based on electric membrane filtration technology |
| CN114288863A (en) * | 2022-01-19 | 2022-04-08 | 清华大学 | Electric control adsorption film assembly and use method thereof |
| CN114890510A (en) * | 2022-06-07 | 2022-08-12 | 西安交通大学 | Sewage treatment device capable of simultaneously filtering and backwashing and sewage treatment method |
| CN114890510B (en) * | 2022-06-07 | 2024-02-20 | 西安交通大学 | Sewage treatment device capable of simultaneously filtering and backwashing and sewage treatment method |
| CN115784378A (en) * | 2022-10-31 | 2023-03-14 | 重庆大学 | Building block type conductive separation membrane system device and method for shale gas back drainage |
| CN116282634A (en) * | 2023-01-06 | 2023-06-23 | 哈尔滨工业大学 | Membrane-mediated conductive oxidation-reduction advanced water treatment device and operation method thereof |
| CN116282634B (en) * | 2023-01-06 | 2024-05-28 | 哈尔滨工业大学 | Membrane-mediated conductive oxidation-reduction advanced water treatment device and operation method thereof |
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