CN110526348A - A kind of film filtering-electro-catalysis sewage water treatment method - Google Patents
A kind of film filtering-electro-catalysis sewage water treatment method Download PDFInfo
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- CN110526348A CN110526348A CN201910934398.9A CN201910934398A CN110526348A CN 110526348 A CN110526348 A CN 110526348A CN 201910934398 A CN201910934398 A CN 201910934398A CN 110526348 A CN110526348 A CN 110526348A
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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
Abstract
The invention belongs to technical field of sewage more particularly to a kind of film filtering-electro-catalysis sewage water treatment methods.Film filtering-electro-catalysis sewage water treatment method provided by the invention, comprising the following steps: by conductive porous film and additional power source is connected to electrode, under pressure differential, sewage flows through conductive porous film, carries out film filtering-electro-catalysis, is purified water.UF membrane and electro-catalysis are carried out coupling in situ by the present invention, the driving energy of membrane filtration processes consumption is used as the mass transfer force of electro-catalysis process simultaneously, the energy efficient for realizing no equipment investment utilizes, pass through the mutual supplement with each other's advantages of electro-catalysis and membrane process, the shortcomings that overcoming membrane filtration processes and electro-catalysis process, improves integral energy utilization efficiency and pollutant process efficiency.
Description
Technical field
The present invention relates to technical field of sewage more particularly to a kind of film filtering-electro-catalysis sewage water treatment methods.
Background technique
Membrane technology is widely used in water and wastewater treatment field.Currently, in the film skill of water treatment field application
Art mainly includes micro-filtration, ultrafiltration, nanofiltration, electrodialysis and reverse osmosis.Wherein, micro-filtration and hyperfiltration technique are mainly used for particulate matter, wadding
Body, bacterium and turbidity removal and be used for film-bioreactor, nanofiltration and it is reverse osmosis be mainly used for water removal in salt,
Virus and some organic pollutants.Membrane process is a pressure-driven process, according to micro-filtration, ultrafiltration, nanofiltration, reverse osmosis suitable
Sequence, transmembrane pressure are sequentially increased, and tens reverse osmosis atmospheric pressure are pressed onto from several atmosphere of micro-filtration.For in membrane process across
Head loss caused by membrane pressure difference if not carrying out recycling to it will imply that a large amount of energy loss, and carries out energy regenerating
A large amount of equipment investment is needed, therefore only has large-scale reverse osmosis unit just to have energy recycle device mating at present.
Micro-filtration, ultrafiltration and nanofiltration have obtained well since filtering accuracy is high, stable effluent quality in field of waste water treatment
It promotes, and has developed film-bioreactor in conjunction with biological treatment, by microbial degradation organic pollutant, film filtering guarantees
The turbidity of water and the index of microorganism.However, energy consumption problem is still the main of limitation micro-filtration, ultrafiltration and Nanofiltration-membrane technique popularization
One of problem.Other than the head loss of cross-film, fouling membrane causes the decline of membrane flux, needs periodically recoil and chemical cleaning,
Also increase process operation expense.
Electrocatalytic oxidation is one of high-level oxidation technology fast-developing in recent years, and due to having, efficient, controllability is strong, nothing
Secondary pollution or seldom secondary pollution, mild condition (can carry out at normal temperature), reactor and operation equipment are simple, be easy to and its
The features such as its technique combines, application of this emerging high-level oxidation technology in purification water pollutant cause scientist
Very big interest.Bacterium and algae [WY Liang, J the H Qu, LB in water can be effectively removed using ruthenium/Ti electrode as anode
Chen,HJ Liu,PJ Lei.Inactivation of Microcystis aeruginosa by Continuous
Electrochemical Cycling Process in Tube Using Ti/RuO2 Electrodes.Environ.Sci
.Technol.2005,39:4633-4639；Wu Xingwu, Gao Tingyao, Li Guojian electrochemical process water process new technology-sterilization are gone out
Algae ACTA Scientiae Circumstantiae, 2000,20s:75-79], without secondary pollution.Boron-doped diamond film-photocatalytic titanium oxide with P-N junction structure
Electro catalytic electrode shows high efficiency [Jiuhui Qu, and Xu during degradation acid orange (II) and 2,4 dichloro phenol
Zhao.Design of BDD-TiO2 Hybrid Electrode with P-N Function for
Photoelectrocatalytic Degradation of Organic Contaminants.Environ.Sci.Techn
ol.,2008,42(13),4934-4939]；Ruthenium titanium electrode and lead oxide/Ti electrode are applied to synthetic leather wastewater treatment [M
Panizza and G Ceresola.Electrochemical oxidation as a final treatment of
Synthetic tannery wastewater.Environ.Sci.Technol.2005,38:5470-5475], it can be effective
Remove COD, coloration, tannic acid and ammonium salt.Electrocatalytic oxidation is shown in the organic pollutants such as removal phenols, nitrobenzene, aniline
Good application prospect [Wu Xingwu, China, State of Zhao, Gao Tingyao electrochemical process water process new technology-degradation of organic waste water environment section
Journal, 2000,20s:80-84；B Nasr,G Abdellatif,PC Sáez,J Lobato,and MA
Rodrigo.Electrochemical Oxidation of Hydroquinone,Resorcinol,and Catechol on
Boron-Doped DiamondAnodes.Environ.Sci.Technol.2005,39,7234-7239；M Mitadera,N
Spataru and A Fujishima.Electrochemical oxidation of aniline at boron-doped
diamond electrodes.Journal of Applied Electrochemistry,2004,34:249-254；PJ.Lobato,R Paz,MA Rodrigo,C Sáez.Electrochemical oxidation of
phenolic wastes with boron-doped diamond anodes.Water Research,2005,39:2687-
2703；Lynne Wallace,Michael P.Cronin,Anthony I.Day,and Damian
P.Buck.Electrochemical Method Applicable to Treatment of Wastewater from
Nitrotriazolone Production.Environ.Sci.Technol.,Article ASAP·DOI:10.1021/
Es8028878.Publication Date (Web): 06February 2009], biodegradable dyeing waste water is difficult in processing
In equally show good performance [X Chen, G Chen, PL Yue.Anodic oxidation of dyes at novel
Ti/B-diamond electrodes.Chemical Engineering Science.2003,58:995-1001；A Wang,
J Qu,H Liu,J Ge.Degradation of azo dye Acid Red 14 in aqueous solution by
electrokinetic and electrooxidation process.Chemosphere,2004,55:1189-1196]。
Although electro-catalytic oxidation technology shows good application prospect, current efficiency is low to restrict always its business
Change and promotes.At present about the research of electrocatalytic oxidation focus primarily upon the research of high-efficient electrode new material, the exploration of reaction mechanism,
The exploration of new application field and the research of high efficiency reactor, wherein diamond film class electrode, polynary titanium-based noble metal oxide
The electrode materials such as electrode show good stability and high efficiency, and 3 D electrode reactor substantially increases reactor efficiency.
Recent studies have indicated that the hydroxyl that the efficiency of Electro-catalytic Oxidation Process organic pollutant is related, free with free hydroxyl radical free radical
Base number of free radical more high pollution object degradation efficiency it is higher [Xiuping Zhu, Meiping Tong, Shaoyuan Shi,
Huazhang Zhao,and Jinren Ni.Essential Explanation of the Strong Minera
lization Performance of Boron-Doped Diamond Electrodes.Environ.Sci.Te chnol.,
2008,42 (13), 4914-4920], however, free hydroxyl radical free radical is inevitable that a part is converted into oxygen analysis
Out, while evolving hydrogen reaction not can avoid yet.It is to cause electrocatalytic oxidation Process Energy by the gassing side reaction that the electrolysis of water generates
One of the main reason for efficiency is undesirable, although being designed to electric floating process, energy efficiency using gassing in partial routine
It is unsatisfactory.There is also the same problems for electro-catalysis reduction process.
To sum up, existing method for treating water haves the shortcomings that high energy consumption and efficiency is low.
Summary of the invention
The purpose of the present invention is to provide a kind of film filtering-electro-catalysis sewage water treatment methods, realize energy efficient and process
Efficient sewage treatment.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of film filtering-electro-catalysis sewage water treatment methods, comprising the following steps:
By conductive porous film and additional power source is connected to electrode, under pressure differential, sewage flows through conductive porous film, into
Row film filtering-electro-catalysis, is purified water.
Preferably, the average pore size of the conductive porous film is 0.8nm~2 μm.
Preferably, when the purification purpose of the sewage is to remove the salt in water, the aperture of the conductive porous film is 0.8
~100nm.
Preferably, the conductive porous film includes porous metal film, porous carbon membrane, porous carbide film, conductive porous gold
Belong to oxidation film, porous conductive polymer film, porous, electrically conductive composite membrane, the porous, electrically conductive film by surface modification or through in via hole
The porous, electrically conductive film of supporting catalytic active component.
Preferably, it is described to electrode include metal, intermetallic compound, carbide, conductive metal oxide, carbon electrode or
Conductive porous film described in above-mentioned technical proposal.
Preferably, the upstream side or downstream side that conductive porous film is set to electrode.
Preferably, the operating voltage that the additional power source is arranged is -10~10V.
Preferably, area to be clean and purifying area are formed when sewage flows through conductive porous film, the area to be clean be sewage into
Water area, the purifying area are that purified water flows out region.
Preferably, the sewage, conductive porous film and purified water are successively arranged according to water (flow) direction.
The present invention provides a kind of film filtering-electro-catalysis sewage water treatment methods, comprising the following steps: by conductive porous film and
Additional power source is connected to electrode, under pressure differential, sewage flows through conductive porous film, carries out film filtering-electro-catalysis, obtains net
Change water.The present invention makees electrode using conductive porous film, constitutes electro-catalytic membrane reactor, applies electric field, film in membrane filtration processes
Anode or cathode as electric field realizes filtering function, trapped particles pollutant and wadding body, when permeate flows through conductive porous film
Duct when, electrocatalytic decomposition occurs on fenestra inner surface for dissolubility pollutant, realizes the coupling of film filtering and electro-catalysis, together
When removal particulate pollutant and dissolubility pollutant.
UF membrane and electro-catalysis are carried out coupling in situ by the present invention, the driving energy of membrane filtration processes consumption (such as water pump
The energy of offer) it is used as the mass transfer force of electro-catalysis process simultaneously, the energy efficient for realizing no equipment investment utilizes, and passes through
The mutual supplement with each other's advantages of electro-catalysis and membrane process, the shortcomings that overcoming membrane filtration processes and electro-catalysis process, improve integral energy benefit
With efficiency and pollutant process efficiency.
Detailed description of the invention
Fig. 1 is inventive film filtering-electro-catalysis sewage treatment schematic illustration；Wherein, 1- porous, electrically conductive film, 2- is to electricity
Pole；
Fig. 2 is that the embodiment of the present invention 1~4 carries out film filtering-electro-catalysis reactor；
Fig. 3 is that the embodiment of the present invention 5 carries out film filtering-electro-catalysis reactor；
Fig. 4 is that the embodiment of the present invention 6 carries out film filtering-electro-catalysis reactor；
Fig. 5 is that the embodiment of the present invention 7~8 carries out film filtering-electro-catalysis reactor.
Specific embodiment
The present invention provides a kind of film filtering-electro-catalysis sewage water treatment methods, comprising the following steps:
By conductive porous film and additional power source is connected to electrode, under pressure differential, sewage flows through conductive porous film, into
Row film filtering-electro-catalysis, is purified water.
In the present invention, if without specified otherwise, required raw material or component are commercially available quotient well known to those skilled in the art
Product.
The present invention by conductive porous film, additional power source and is sequentially connected electrode.In the present invention, the conductive porous film
Preferably include porous metal film, porous carbon membrane, porous carbide film, conductive porous metal oxide film, porous conductive polymer
Film, porous, electrically conductive composite membrane, the porous, electrically conductive film by surface modification or the porous of supporting catalytic active component is led in via hole
Electrolemma.In an embodiment of the present invention, it is specifically as follows tubular type carbon membrane, titanium film, plate carbon membrane, load 1.2%RuO2Carbon membrane
Or supported palladium/copper alloy catalyst carbon membrane.
The present invention does not have special restriction to the additional power source, is capable of providing burning voltage.In the present invention, excellent
The operating voltage that the additional power source is arranged in choosing is -10~10V, more preferably -0.2~8V, most preferably -0.1~6V.
In the present invention, it is described to electrode preferably include metal, intermetallic compound, carbide, conductive metal oxide,
Carbon electrode or conductive porous film, the conductive porous film are preferably conductive porous film described in above-mentioned technical proposal.Of the invention
In embodiment, described is specially stainless steel, graphite plate or carbon electrode to electrode；It is described that the upper of conductive porous film is set to electrode
Swim side or downstream side.The present invention preferably penetrates the direction of film according to water, matches in the upstream side of close conductive porous film or downstream side
It sets to electrode, the conductive porous film, additional power source constitute current loop to electrode and water.
Conductive porous film and the connection type for being connected to additional power source to electrode are not had special restriction by the present invention, are selected
Electric connection mode well known to those skilled in the art.
After by conductive porous film and being connected to additional power source to electrode, under pressure differential, sewage flows through conductive porous film,
Film filtering-electro-catalysis is carried out, water is purified.The present invention does not have special restriction to the source for providing the pressure difference, selects this
The device of pressure difference is capable of providing known to the technical staff of field, in an embodiment of the present invention, the pressure differential is specific
It is provided by water pump or vacuum pump.
In the present invention, when sewage flows through conductive porous film, area to be clean and purifying area are formed, the area to be clean is dirt
Water inlet area, the purifying area are that purified water flows out region.In the present invention, after sewage flows through conductive porous film, membrane body will
Sewage is divided into two regions mutually completely cut off, area to be clean and purifying area；The sewage, conductive porous film and purified water are preferably pressed
It successively arranges according to water (flow) direction.In the present invention, the area to be clean is wastewater influent region, and the sewage includes particle contamination
Object, wadding body, macromolecule contaminant, salt and small molecule contaminants；The purifying area is that purified water flows out region, purified water, that is, net
Gained water after change.It is flowed through in conductive porous membrane process in sewage, particulate pollutant, wadding in conductive porous film retention removal sewage
Body and macromolecular substances；And the permeability pollutant (salt and small molecule contaminants) not being trapped is in the hole of conductive porous film
Pass through electrocatalytic oxidation or reduction outside interior, film surface or film, partly or entirely decomposes or degradation generates harmless carbon dioxide, water
Or nitrogen.
In the present invention, membrane pollution problem is inevitably present in membrane filtration processes, the water pollutant of retention covers
It covers in film surface, membrane flux can be reduced, present invention preferably employs regular chemical cleanings and gas (or water) recoil to clean film surface,
Prevent influence of the fouling membrane to treatment effeciency.In addition, gassing also can be to film during making the electro-catalysis of electrode using conductive film
Cleaning action is played on surface, and reduces concentration polarization, prevent fouling membrane, it can be achieved that the consumed energy of gassing side reaction efficient benefit
With；And the decomposable organic pollutant for being deposited on film surface of electro-catalysis, it also can be realized film in conjunction with control gassing side reaction
Cleaning, further saves energy.
In the present invention, the average pore size of the conductive porous film is preferably 0.8nm~2 μm, the μ of more preferably 0.8nm~1
M, most preferably 0.8~800nm.The present invention passes through the aperture for controlling conductive porous film, in conjunction with film filtering and electrocatalytic reaction, energy
Enough realize efficient catalytic.
In the present invention, when the purification purpose of the sewage is to remove the salt in water, the aperture of the conductive porous film
Preferably 0.8~100nm, more preferably 0.8~60nm, most preferably 0.8~50nm.When handling saline sewage, salt ion
Retention is acted on by the confinement in hole on conductive porous film, and it is strong under electric field action with the electrically charged identical ion of membrane electrode
Change retention.The aperture that the present invention controls conductive porous film is nanoscale, desalination is carried out using the confinement effect that film generates, to conduction
After perforated membrane applies electric field, the repulsive interaction of electric field and confinement desalination are combined, and can further increase desalting efficiency.
The present invention selects the conductive porous film of smaller aperture due, and pollutant and hole wall will be improved when sewage flows through duct in film
The touch opportunity of (membrane electrode inner surface) improves " electrode area/amount of pollutants " ratio, improves one way reaction efficiency.
Fig. 1 is inventive film filtering-electro-catalysis sewage treatment schematic illustration, as shown, the conductive porous film of 1-, 2-
To electrode.The present invention makees electrode (i.e. the anode or cathode of electric field) using conductive porous film 1, and to electrode 2 and additional power source structure
At electro-catalytic membrane reactor, apply electric field in membrane filtration processes, sewage flows through conductive porous film, forms area to be clean and purification
Area, conductive porous film realize filtering function, trapped particles pollutant and wadding body, when through liquid stream fenestra road, dissolve contact scar
Electrocatalytic decomposition occurs on the internal surface of hole of conductive porous film for object, realizes the coupling of film filtering and electro-catalysis, while removal
Grain pollutant and dissolubility pollutant, are purified water.
The present invention does not have special restriction to structure of reactor used in the film filtering-electro-catalysis sewage water treatment method,
It can satisfy structural requirement described in above-mentioned technical proposal, in an embodiment of the present invention, reactor used specific structure
Referring to fig. 2~5, specific structure illustrates in a related embodiment, but these structure of reactor are not the side described in embodiment
The restriction of method selects the reactor of other structures that the scheme of the embodiment of the present invention still can be implemented.
The present invention does not have the treatment conditions (such as transmembrane pressure, water temperature, crossflow velocity etc.) of the film filtering-electro-catalysis
Special restriction specifically adjust according to reactor used structure.
Below in conjunction with the embodiment in the present invention, the technical solution in the present invention is clearly and completely described.It is aobvious
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Examples 1 to 4 carries out film filtering-electro-catalysis sewage treatment using reactor shown in Fig. 2, wherein 3- raw water slot；4-
Water pump；5- insulated enclosure circle；The conductive porous film of 6-；7- is to electrode；8- treated water outlet；9- shut-off valve；10- power supply.
The process of sewage treatment is carried out using Fig. 2 shown device are as follows: power supply 10 is opened, in conductive porous film 6 and to electrode 7
Apply voltage on shell, sewage enters area to be clean, and conductive porous film 6 is flowed through under the pressure differential of water pump 4, carries out film mistake
Filter-electro-catalysis, gained purified water enter purifying area, are flowed out by treated water outlet 8 and by collecting outside film to electrode shell；
Wherein, particulate matter, wadding body and macromolecule contaminant are retained by filtering, and permeability pollutant is passing through fenestra or contact film surface
When by electrocatalytic oxidation or be reduced into innocuous substance, electrode surface can delay or inhibit film dirty due to the bubble that electrolysis water generates
Dye.
Embodiment 1
Using average pore size for 0.56 μm of tubular type carbon membrane is conductive porous film (anode), using stainless steel as pressure shell simultaneously
As cathode (to electrode), cross-flow filtration electro-catalytic membrane reactor is constituted, advanced treating is carried out to certain sewage disposal plant effluent.If
Determine treatment conditions: transmembrane pressure 0.1MPa, 1.95~2.05ms of crossflow velocity-1, 25~32 DEG C of water temperature, operating voltage 5V.
Influent quality (sewage) index are as follows: it is yellowish, there are peculiar smell, 60~320 (mgL of COD-1), 4~27 (mg of ammonia nitrogen
L-1), turbidity 18~155 (NTU), pH value 6~9.
The result shows that under the conditions of no power, filtration flux 0.04m3.m-2.h-1, COD removal rate 50.31%, ammonia nitrogen is gone
Except rate 75%, turbidity removal rate 80%.After applying electric field, permeation flux improves 100%, is 0.08m3·m-2·h-1, COD removal
Rate is increased to 80%, and ammonia nitrogen removal frank is more than 90%, and turbidity removal rate 80%, effluent quality reaches reclaimed water standard.This
Illustrate, the present invention combines film filtering-electro-catalysis technology, can significantly improve wastewater treatment efficiency, can be realized energy efficient
Sewage is handled with processing efficient.
Embodiment 2
Using filtering accuracy for 0.2 μm of titanium film is conductive porous film (anode), and stainless steel is pressure shell and as yin
Pole (to electrode) constitutes cross-flow filtration electro-catalytic membrane reactor, setting processing condition: transmembrane pressure 0.1MPa, crossflow velocity
3.2m·s-1, 20~28 DEG C of temperature, operating voltage 5V, raw water is simulated wastewater, wherein contains 2 μm of average grain diameter in simulated wastewater
Flyash 5%, phenol 30mgL-1, ammonia nitrogen 30mgL-1。
After processing, flyash removal rate 100%, phenol removal rate 83%, ammonia nitrogen removal frank 60%.
Embodiment 3
Use 2 μm of average pore size of tubulose carbon membrane for conductive porous film (anode), stainless steel is pressure shell and doubles as yin
Pole (to electrode), setting processing condition: operating voltage 3.2V, crossflow velocity 3ms-1, transmembrane pressure 0.1MPa, processing is simulated useless
Water, wherein simulated wastewater 500mgL containing phenol-1。
After processing, phenol removal rate is 89%.
Embodiment 4
Use the carbon membrane of average pore size 1nm for conductive porous film (anode), stainless steel is for pressure shell and (right as cathode
Electrode), setting processing condition: operating voltage 3V, crossflow velocity 3ms-1, handle simulated wastewater.Wherein, simulated wastewater is containing average
The flyash 5% that 2 μm of partial size, phenol 2000mgL-1。
After processing, flyash removal rate 100%, phenol removal rate 100%.
Embodiment 5
The present embodiment carries out film filtering-electro-catalysis sewage treatment using reactor shown in Fig. 3, wherein 11- raw water slot；
12- water pump；13- raw water feed cavity；14- insulated enclosure circle；The conductive porous film of 15-；16- is to electrode；17- purifies water collecting groove；
18- shut-off valve；19- power supply；The treatment process of the reactor is similar to reactor shown in Fig. 2.
Using the load 1.2%RuO of average pore size 8.3nm2Carbon membrane be conductive porous film (anode), stainless steel is cathode
Sewage promotion is flowed through 15 surface of carbon membrane with water pump 12, under differential pressure action using plate membrane cross-flow filtration mode by (to electrode)
Part water is reached by film by constituting space to electrode 16 and conductive porous film 15 and insulated enclosure circle 14, is arrived under pressure
Up to purification water tank 17, particulate matter and wadding body etc. are trapped within raw water feed cavity 13 and take back raw water slot 11 by cross-flow water；Dissolubility
Pollutant is degraded under electrocatalysis when passing through film.Wherein, raw water quality is the same as embodiment 1, setting processing condition: cross-flow
2~2.5ms of speed-1, operating voltage 3.5V.
After processing, COD removal rate 92%, ammonia nitrogen removal frank 100%, turbidity removal rate 100%.
Embodiment 6
The present embodiment carries out film filtering-electro-catalysis sewage treatment using reactor shown in Fig. 4, wherein 20- raw water
Slot；21- power supply；The conductive porous film of 22-；23- is to electrode；24- spacer；25- purifies water collecting groove；26- vacuum pump.
Use the plate carbon membrane of average pore size 20nm for conductive porous film (anode), graphite plate is cathode (to electrode), is put down
Plate carbon membrane and to separating and being formed gap between electrode by rubber seal spacer, is placed in raw water slot 20 for reactor and (holds
Sewage) in, transmembrane pressure is constructed by the swabbing action of vacuum pump 26, driving sewage passes through film and enters purification water collecting groove
25。
Setting processing condition: operating voltage 0.4V, processing simulation salt water, wherein simulation salt water sulfur acid sodium 500mg
L-1。
After processing, sulfate ion removal rate 71%, sodium ion removal rate are 69%.
Embodiment 7
The present embodiment carries out film filtering-electro-catalysis sewage treatment using reactor shown in fig. 5, wherein 27- power supply, 28-
Raw water slot, 29- blender, the conductive porous film of 30-, 31- cation-exchange membrane, the anode chamber 32-, 33- carbon is to electrode, 34- pressure
Sensor, 35- peristaltic pump, 36- purification water tank.
Use the tubulose carbon membrane of average pore size 8.3nm for conductive porous film, carbon electrode is cathode (to electrode), tubulose carbon membrane
And electrode 33 is placed in the raw water slot 28 with stirring to cation-exchange membrane 31, tubulose carbon membrane and carbon are arranged between electrode, lead to
Swabbing action driving raw water (sewage) for crossing peristaltic pump 35 passes through film and enters in purification water tank 36；Setting processing condition: work
Voltage is 0.4V, crossflow velocity 3ms-1, processing simulation salt water, wherein sulfur acid sodium 500mgL in simulation salt water-1。
The processing of simulation salt water is first carried out using tubulose carbon membrane as anode, is then yin with tubulose carbon membrane using same apparatus
Pole carries out the processing of simulation salt water.
After processing, sulfate ion removal rate 94%, sodium ion removal rate are 91%.
Embodiment 8
It uses average pore size 8.3nm and supported palladium/copper alloy catalyst carbon membrane is conductive porous film (anode), with carbon electricity
Extremely cathode (to electrode), according to process described in embodiment 7, using the simulated wastewater of reactor for treatment nitrate nitrogen shown in Fig. 5, if
Fixed working voltage is -4V；Wherein, sodium nitrate concentration is 50mM in simulated wastewater.
After processing, nitrate anion removal rate is 98%.
As seen from the above embodiment, the present invention provides a kind of film filtering-electro-catalysis sewage water treatment method, the present invention is by film
Separation and electro-catalysis carry out coupling in situ and overcome membrane filtration processes by the mutual supplement with each other's advantages of electro-catalysis and membrane process and electricity is urged
The shortcomings that change process, improves integral energy utilization efficiency and pollutant process efficiency.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of film filtering-electro-catalysis sewage water treatment method, which comprises the following steps:
By conductive porous film and additional power source is connected to electrode, under pressure differential, sewage flows through conductive porous film, carries out film
Filtering-electro-catalysis, is purified water.
2. the method according to claim 1, wherein the average pore size of the conductive porous film is the μ of 0.8nm~2
m。
3. the method according to claim 1, wherein when the purification purpose of the sewage is the salt removed in water
When, the aperture of the conductive porous film is 0.8~100nm.
4. described in any item methods according to claim 1~3, which is characterized in that the conductive porous film includes porous metals
Film, porous carbon membrane, porous carbide film, conductive porous metal oxide film, porous conductive polymer film, porous, electrically conductive are compound
Film, the porous, electrically conductive film by surface modification or in via hole supporting catalytic active component porous, electrically conductive film.
5. the method according to claim 1, wherein described includes metal, intermetallic compound, carbonization to electrode
Object, conductive metal oxide, carbon electrode or conductive porous film as claimed in claim 4.
6. method according to claim 1 or 5, which is characterized in that the upstream for being set to conductive porous film to electrode
Side or downstream side.
7. the method according to claim 1, wherein be arranged the additional power source operating voltage be -10~
10V。
8. the method according to claim 1, wherein when sewage flows through conductive porous film, formed area to be clean and
Purifying area, the area to be clean are wastewater influent region, and the purifying area is that purified water flows out region.
9. method according to claim 1 or 8, which is characterized in that the sewage, conductive porous film and purified water are according to water
It successively arranges in stream direction.
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| CN114956275A (en) * | 2022-05-16 | 2022-08-30 | 南京理工大学 | Electro-catalytic device based on sequential structure separation-catalysis ultrafiltration membrane |
| CN115304125A (en) * | 2022-07-21 | 2022-11-08 | 唐山开滦化工科技有限公司 | Treatment method of emulsified oil-containing wastewater |
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| CN113666549A (en) * | 2021-09-08 | 2021-11-19 | 上海交通大学重庆研究院 | Micro-nano O coupled with salt-separating carbon-reducing membrane electrode of percolation concentrate3Apparatus and method |
| CN113666549B (en) * | 2021-09-08 | 2023-12-12 | 上海交通大学重庆研究院 | Salt-separating carbon-reducing membrane electrode coupling micro-nano O of percolation concentrate 3 Apparatus and method |
| CN114956275A (en) * | 2022-05-16 | 2022-08-30 | 南京理工大学 | Electro-catalytic device based on sequential structure separation-catalysis ultrafiltration membrane |
| CN115304125A (en) * | 2022-07-21 | 2022-11-08 | 唐山开滦化工科技有限公司 | Treatment method of emulsified oil-containing wastewater |
| 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 |
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