CN103936139B - A kind of low energy consumption resistant to pollution MBR device and application thereof - Google Patents
A kind of low energy consumption resistant to pollution MBR device and application thereof Download PDFInfo
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- CN103936139B CN103936139B CN201410138194.1A CN201410138194A CN103936139B CN 103936139 B CN103936139 B CN 103936139B CN 201410138194 A CN201410138194 A CN 201410138194A CN 103936139 B CN103936139 B CN 103936139B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The present invention relates to a kind of low energy consumption resistant to pollution MBR device and application thereof, should be made up of water inlet pipe, aerator, aeration tank, diaphragm, exhaust-valve, suction pump, film group device etc..Assembly of the invention save energy consumption, anti-pollution, film is thin, intensity is high, flux is high, easy cleaning, low cost, application easy to spread.Owing to this kind of process operation expense is relatively low, and effluent quality is excellent, both can be used alone, it is also possible to as the pretreatment of UF or RO technique, applied range.
Description
[technical field]
The invention belongs to water-treatment technology field.More particularly it relates to an low energy consumption anti-soil
The MBR device (membrane bioreactor, Membrane Bio-Reactor, MBR) of dye, further relates to institute
State the purposes of MBR device.
[background technology]
Membrane bioreactor, as a kind of efficient wastewater treating process, has merged traditional biological treatment skill
The biological degradation function of art and the high efficiency separation function of membrane separation technique, have contaminant removal efficiency
The advantages such as height, stable effluent quality, convenient operation and management, floor space are few.But, the operation of film
The limiting factor of the higher always MBR large-scale application of energy consumption.
The higher main cause of energy consumption of film be in MBR membrane cisterna MLSS concentration (mixed liquor suspended solid, MLSS is dense
Degree, mixed liquid suspended solids) the highest, the flux of film to be strengthened, decelerating membrane pollution,
Flow velocity must be increased, wash away film surface.Therefore, reduce aeration energy consumption and can reduce the cost of investment of film
Large-scale application with operating cost, beneficially MBR.
In MBR technique, due to characteristic (membrane aperture, membrane material), the mixed liquor of membrane material itself
Characteristic (sludge concentration, flco particle diameter) and operating condition (aeration intensity, cross-flow velocity) etc. because of
The critical flux of element, micro-filtration membrane and ultrafilter membrane far below the pure water flux of film, so causes MBR always
The raising of cost.
And, the effluent index of current MBR technology is significantly better than each of country's sewage disposal discharge standard
Item index.Municipal sewage plant's one-level emission standard A concentration of suspension is 10mg/L, and MBR
Water outlet is well below this standard, mostly less than 1mg/L.
Many water process worker and are studied for low energy consumption high flux membrane, such as CN
102580544A discloses a kind of high flux antipollution flat board film group device and flat sheet membrane device, this Flat Membrane
Group device, mainly by increasing aeration case, reduces and has two film casees on aeration dead angle, and aeration case, joint
Save aeration rate.But, this device is adjusting process itself, reduces energy consumption, not from all
The performance of upper raising film, and, take the mode of jet-flow aeration for lessening membrane fouling, easily cause nozzle
Block, be not suitable for using in big membrane cisterna.CN 101941759 A discloses a kind of weak electric field to be slowed down
Fouling membrane improves the method for membrane flux, i.e. by direct on the after-applied electric field of face or use conducting film
Apply the electric field of 0.2-0.5V, repel polluter, to control and decelerating membrane pollution.But the method is deposited
In the unstability of electric field, and the limited use that weak electric field is to decelerating membrane pollution, and in engineering not
It is suitable for large-scale application.
Low energy consumption high-throughout MBR device and operation process there is also asking of a lot of technology as can be seen here
Topic, limits its application in engineering.
It is contemplated that by reducing effluent quality in the range of allowing in standard, it is to avoid MBR water outlet water
The most excellent problem causing operating cost to increase of matter, a kind of flux thin film big, resistant to pollution of exploitation and operation
Technique.
[summary of the invention]
[solving the technical problem that]
It is an object of the invention to provide a kind of low energy consumption resistant to pollution MBR device.
It is a further object to provide the purposes of described low energy consumption antipollution MBR device.
[technical scheme]
The present invention is achieved through the following technical solutions.
The present invention provide can in mixed liquor big flux operation film group device.This film group device is tubular membrane
Structure, film is the macroporous membrane of 0.4-5 micron, relies on negative pressure-pumping with 40-50LMH(flux unit, rises
Every square metre is per hour, Liters per square Meter per Hour) run.The method of operation is for opening 7
Stop 1(i.e. to run 7min and stop 1min) periodic running, aeration mode is pulsed aeration, normally transports
Aeration intensity during row is 60m3/m2.h, the high aeration intensity 150m of 10min is had every 1h3/m2.h, high
Aeration effectively prevent pollutant and adheres on film, decreases fouling membrane, and can with this aeration mode
To save energy consumption.
The present invention relates to a kind of low energy consumption resistant to pollution MBR device.This device is by water inlet pipe 1, aerator
2, aeration tank 3, diaphragm 4, exhaust-valve 5, vacuum meter 6, suction pump 7, effusion meter 8, flowing water Valve 9
Form with film group device 10.
Described diaphragm 4 be percent opening 30～70% screen cloth on striking a layer thickness 75～85 μm casting film
The diaphragm that liquid is formed.
In the present invention, the screen cloth used be sell in the market, by terylene, nylon or mixed
The screen cloth that condensating fiber material is made.
Described casting solution is by by weight 4～12 weight portion PVDF(Kynoar), 70～90
Weight portion DMAC(dimethyl acetylamide), 4～10 weight portion PEG8000(PEG 8000s)
With 4～12 weight portion PVP(polyvinylpyrrolidones) form.
Described casting solution uses following method to prepare:
Use 70～85 weight portion DMAC as solvent, 4-12 weight portion PVDF as raw material, 4～12
Weight portion PVP and 4～10 weight portion PEG8000 is as additive, and they are miscible, obtains described casting
Film liquid.
Described PVDF, DMAC, PEG8000 and PVP are product solds in the market.
Casting solution is coated uniformly in described screen surface, temperature 50～70 DEG C in 1# coagulation bath
Lower immersion 5～10min, then in 2# coagulation bath, soak 8～12h, then used 30% glycerol to soak,
Dry, then form diaphragm 4.
Described 1# coagulation bath is 20%DMAC and 80% water, and 2# coagulation bath is pure water.
Use SEM(Scanning electron microscope, sweep electron microscope) to obtaining
Diaphragm 4 carried out pore structure study, its diaphragm 4 has the spongy pore structure that aperture is 0.4～5.0 μm.
Described SEM is FDAC S4800 scanning electron microscope.
The premise realizing this technology is that this film is that film thickness is little with latticed screen cloth for basement membrane thin film
In 80 microns.So, polluter is not easily accessible inside film, and the partial hole being combined with screen cloth is relatively
Greatly, compared with the film with non-woven fabrics as basement membrane, thickness reduces 50%, and polluter is difficult in film inner product
Tired, the anti-effect cleaned is preferable.The pure water flux of this kind of film can reach 10000LMH under 0.1MPa
(l/h rice2), therefore use the flux of 50LMH to run in running, online chemistry is clear
The cycle of washing can extend to 3-4 week.
Described diaphragm 4 is dismountable tubular membrane structure, and the two ends of every assembly are plug in construction, by
The supporting construction of every assembly with film group device 10 is ensured to seal by O RunddichtringO.The support knot of described film
The hard spring that structure steel wire, plastic steel wire or rigid plastics are made.
Accompanying drawing 1 is membrane module structure, and this assembly is tubular membrane structure, is attached to prepared screen cloth film support
The surface of spring, both ends of the spring is bonded on pvc pipe, and pvc pipe is inserted by fast, on the diaphragm of connection,
I.e. make the screen cloth membrane module of demountable structure.
Owing to being spring structure inside this film, in aeration process, film is along with current shake, decreases pollution
Thing is in the attachment on film surface.Tubular membrane (as shown in Figure 1) two ends use plug in construction, such as it
In certain root breakage then can pull down replacing at any time, it is not necessary to change full wafer film, save the renewal cost of film.
Owing to the special construction of film makes counter to clean that the good results are evident, so this film design and operation mode is not
It is substantially identical to the operation process of conventional MBR, the gap method of operation adds online water backwash process.
When pollutant film surface accumulate to a certain extent, formed gel layer time, use online water-gas combined instead
Washing, according to experimental result for mixed liquor of different nature, scavenging period is different, usual scavenging period
For 4-6h, water consumption is 2 times of water outlet, time 2min, strengthens membrane cisterna aeration rate to 150m simultaneously3/m2.h.
Understanding according to calculating, this process takies the 1.1-1.7% of water yield, however, it is possible to extend the cleaning week of film
Phase 3-4 times.
In the case of the hot strength of film is relatively big, this film uses the mode of height intermission aeration, high exposure
The pollutant being partly adhered to film surface can be removed during gas, but due to filametntary in screen cloth own
Effect, film will not produce breakage, and save energy consumption.
The operating flux of described film is 40～50LMH, and this device uses intermittent duty to tie mutually with online backwash
The mode closed, carries out online backwash resting gap, and the water yield of online backwash is 1.5～2 times of aquifer yield.
Accompanying drawing 2 is the structure chart of this device, and this device is made up of 6 films, the knot of described single diaphragm
As described in Figure 1, diaphragm is for being placed in parallel, and the distance between single diaphragm is 30-50mm for structure.Pass through
The framework of group device 10 is supported.The upper end of diaphragm is provided with outlet, and outlet is connected with collector pipe,
Water outlet is aspirated by suction pump.
Specifically, the sewage (the such as water outlet of anoxia section) of FEOL enters pulling flow type Aerobic Pond,
The device shown in accompanying drawing 2 is laid at the end 1/3 of Aerobic Pond gallery.Sewage enters film group device 10, is taking out
Under the effect of sucking pump 7, mixed liquor is trapped within the surface of diaphragm 4, produces water and is discharged by outlet pipe.Go out
The flow (i.e. membrane flux) of water is controlled with outlet valve 9 regulation by flow 8.In the process that diaphragm 4 runs
In, the aeration tank 3 bottom film group device 10 is connected to aerator 2, is regulated by the control valve of aerator
The size of aeration rate, it is achieved just intermission aeration.After running certain time, carry out online backwash, logical
Crossing that backwashing pump 11 water outlet is counter to be thrown in diaphragm 4, water is left to surface inside hollow-fibre membrane, destroys table
The gel layer in face, it is achieved cleaning performance.
The invention still further relates to described MBR device separate at mud mixed liquid, producing fruit juice or medicine
Time highly filled concentrate solid-liquid separation in purposes.
High flux pollution-resistant membrane of the present invention and membrane process can apply to effluent quality requirement looser
Project, compared with conventional MBR technique, processing cost can save 50%, and floor space is little, throws
Money cost can save 25%.
[beneficial effect]
The invention has the beneficial effects as follows:
1, energy consumption is saved.MBR aeration energy consumption is higher, always the important component part of operation energy consumption,
The present invention makes the film of big flux, improves the operating flux of film, saves floor space, saves aeration energy
Consumption；2, anti-pollution.MBR membrane pollution problem is always the point of people in the industry's research, and this film film layer is relatively thin,
It is only 100 microns, and surface holes is less, be difficult to pollute；3, film is thin, intensity is high.This film
Basement membrane is not non-woven fabrics, but 150-200 mesh terylene screen cloth, the inner surface of such film can be embedded in screen cloth
In, reduce the thickness of film, increase film strength；4, flux is high.Owing to film is thin, and at running
In be constantly in dither state, be difficult to pollute, therefore can to bring up to 50LMH left for the operating flux of film
Right.5, easy cleaning.Film easy cleaning, because film is relatively thin, polluting lighter when, utilizes air water anti-
The cleaning way washed can make the flux recovery more than 90% of film；6, low cost.This membrane module structure is adopted
With tubular membrane, internal use spring cupport structure, compared with the structure of Flat Membrane, save film and support
The expense of structure, reduces the cost of MBR；And this membrane module uses detachable, every bourdon tube
Joint and assembly be plug-in type, if wherein certain root film is damaged, can change at any time, reduce film more
Change expense；7, application easy to spread.Owing to this kind of process operation expense is relatively low, and effluent quality is excellent,
Both can be used alone, it is also possible to as the pretreatment of UF or RO technique, applied range.
[accompanying drawing explanation]
Fig. 1 is the structural representation of low energy consumption of the present invention resistant to pollution MBR device.
In figure: 1-inserts soon；2-PVC manages；3-screen cloth film；4-supports spring
Fig. 2 is low energy consumption of the present invention resistant to pollution MBR apparatus structure schematic diagram.
In figure:
1-water inlet pipe；2-aerator；3-aeration tank；4-diaphragm；5-exhaust-valve；6-vacuum meter；7-
Suction pump；8-effusion meter；9-flowing water Valve；10-group device.
Fig. 3 is that apparatus of the present invention contrast operating pressure variation diagram with existing apparatus.
[detailed description of the invention]
The present invention is will be better understood that by following embodiment.
Embodiment 1: low energy consumption of the present invention resistant to pollution MBR device
The enforcement step of this embodiment is as follows:
Low energy consumption of the present invention resistant to pollution MBR device is as shown in Figure 2.It is by water inlet pipe 1, air blast
Machine 2, aeration tank 3, diaphragm 4, exhaust-valve 5, vacuum meter 6, suction pump 7, effusion meter 8, water outlet
Valve 9, film group device 10 form with back suction pump 11.
Described diaphragm 4 is striking a layer thickness on the screen cloth that percent opening 30% polyester material is made
The diaphragm that the casting solution of 75 μm is formed.
Use 80 weight portion DMAC as solvent, 4 weight portion PVDF as raw material, 6 weight portion PVP
With 10 weight portion PEG8000 as additive, they are miscible, obtain described casting solution.
Casting solution is coated uniformly in described screen surface, soaks under temperature 60 C in 1# coagulation bath
Bubble 8min, then in 2# coagulation bath, soak 10h, then used 30% glycerol to soak, dried, then
Form diaphragm 4.
Using SEM that the diaphragm 4 obtained has been carried out pore structure study, its diaphragm 4 has aperture and is
The spongy pore structure of 0.4 μm.
Using long 480mm, wide 15mm, the assembly of high 1100mm, single film external diameter is 10mm, one
Individual assembly install 32 films, be placed in high 1.5 meters of high membrane cisternas open 7 stop 1(run 7min stop 1min) between
Having a rest operation, the sludge concentration in membrane cisterna is 8000mg/L, and low aeration intensity is 60m3/m2.h, high aeration
Intensity is 150m3/m2.h, every 6h water outlet backwash 2min.Water outlet, operating flux is aspirated by suction pump
For 40LMH, operating pressure maintains 0.002-0.01MPa.After running 5 days continuously, determine water outlet
Water quality, wherein COD uses potassium dichromate method (GB11914-89) to measure, and ammonium nitrogen is to use
Berthelot spectrophotometry (GB7479-87) measures, SS(water quality float) it is to use weight
Method (GB/T11901-1989) measures, and its measurement result is shown in Table 1.
Table 1: the present embodiment membrane module operation result
From data in table 1, the water outlet of this kind of film meets GB8978-1996 " integrated wastewater discharge mark
Accurate " one-level A standard, and after being cleaned multiple times, the operating pressure of film has no the too fast phenomenon of rising, water outlet
Water quality is good.
Embodiment 2: low energy consumption of the present invention resistant to pollution MBR device
The enforcement step of this embodiment is as follows:
Use low energy consumption same as in Example 1 resistant to pollution MBR device, the most described diaphragm 4
It it is the casting solution institute of striking a layer thickness 80 μm on the screen cloth that percent opening 50% nylon material is made
The diaphragm formed.
Use 70 weight portion DMAC as solvent, 12 weight portion PVDF as raw material, 10 weight portion PVP
With 8 weight portion PEG8000 as additive, they are miscible, obtain described casting solution.
Casting solution is coated uniformly in described screen surface, soaks under temperature 50 C in 1# coagulation bath
Bubble 10min, then in 2# coagulation bath, soak 12h, then used 30% glycerol to soak, dried, then
Form diaphragm 4
Using SEM that the diaphragm 4 obtained has been carried out pore structure study, its diaphragm 4 has aperture and is
The spongy pore structure of 2.0 μm.
Using long 480mm, wide 15mm, the assembly of high 1100mm, single film external diameter is 10mm, one
Individual assembly install 32 films, be placed in high 1.5 meters of high membrane cisternas open 7 stop 1(run 7min stop 1min) between
Having a rest operation, the sludge concentration in membrane cisterna is 8000mg/L, and low aeration intensity is 60m3/m2.h, high aeration
Intensity is 150m3/m2.h, every 5h water outlet backwash 2min.Water outlet, operating flux is aspirated by suction pump
For 45LMH, operating pressure maintains 0.004-0.012MPa.After running 5 days continuously, determine water outlet
Water quality, wherein COD uses potassium dichromate method (GB11914-89) to measure, and ammonium nitrogen is to use
Berthelot spectrophotometry (GB7479-87) measures, SS(water quality float) it is to use weight
Method (GB/T11901-1989) measures, and its measurement result is shown in Table 2.
Table 2: the present embodiment membrane module operation result
From data in table 2, the water outlet of this kind of film meets GB8978-1996, and " integrated wastewater discharges
Standard " one-level A standard, and after being cleaned multiple times, the operating pressure of film has no the too fast phenomenon of rising,
Effluent quality is good.
Embodiment 3: low energy consumption of the present invention resistant to pollution MBR device
The enforcement step of this embodiment is as follows:
Use low energy consumption same as in Example 1 resistant to pollution MBR device, the most described diaphragm 4
It it is the casting solution institute of striking a layer thickness 85 μm on the screen cloth that percent opening 70% polyester material is made
The diaphragm formed.
Use 85 weight portion DMAC as solvent, 7 weight portion PVDF as raw material, 4 weight portion PVP
With 4 weight portion PEG8000 as additive, they are miscible, obtain described casting solution.
Casting solution is coated uniformly in described screen surface, soaks under temperature 70 C in 1# coagulation bath
Bubble 5min, then in 2# coagulation bath, soak 8h, then used 30% glycerol to soak, dried, then shape
Become diaphragm 4
Using SEM that the diaphragm 4 obtained has been carried out pore structure study, its diaphragm 4 has aperture and is
The spongy pore structure of 5.0 μm.
Using long 480mm, wide 15mm, the assembly of high 1100mm, single film external diameter is 10mm, one
Individual assembly install 32 films, be placed in high 1.5 meters of high membrane cisternas open 7 stop 1(run 7min stop 1min) between
Having a rest operation, the sludge concentration in membrane cisterna is 8000mg/L, and low aeration intensity is 60m3/m2.h, high aeration
Intensity is 150m3/m2.h, every 4h water outlet backwash 2min.Aspirate water outlet by suction pump, run logical
Amount is 50LMH, and operating pressure maintains 0.004-0.02MPa.After running 5 days continuously, determine out
Water water quality, wherein COD uses potassium dichromate method (GB11914-89) to measure, and ammonium nitrogen is to adopt
Measure with Berthelot spectrophotometry (GB7479-87), SS(water quality float) it is to use weight
Mensuration (GB/T11901-1989) measures, and its measurement result is shown in Table 3.
Table 3: the present embodiment membrane module operation result
From data in table 3, the water outlet of this kind of film meets GB8978-1996, and " integrated wastewater discharges
Standard " one-level A standard, and after being cleaned multiple times, the operating pressure of film has no the too fast phenomenon of rising,
Effluent quality is good.
Embodiment 4: apparatus of the present invention contrast running experiment with existing apparatus
The device described according to accompanying drawing 2 is placed in membrane cisterna and carries out.Use the film inner support of this film device
Structure uses the spring that plastic steel wire is done, and two ends can be dismantled, and this group device includes 6 films,
Area is 27m2, film group device is 650 × 400 × 2400mm, and the membrane cisterna depth of water is 2.8-3m, sludge concentration
For 9000-10000mg/L.With 50LMH run, interval open 7 stop 1(run 7min stop 1min)
Running, have online backwashing system, cleaning frequency is 6h/ time, and cleaning flux is 80LMH, time 2min.
Aeration is low aeration 70m3/m2.h 55min, high aeration 150m are run3/m2.h 5min is run.With existing
Having curtain type membrane method of operation contrast in the engineering of technology, wherein curtain type membrane is according to this plant area area,
Being 6 films, area is 33m2, to run with 25LMH, interval is opened 7 and is stopped 1 operation, aeration intensity
For all exposing 130m3/m2.h, during both run, pressure change is listed in accompanying drawing 3.
As shown in Figure 3, the high-throughout film device of low energy consumption of the present invention operating pressure ratio in 3 months
More stable, do not surpass 0.02MPa, it is not necessary to on-line cleaning, and conventional MBR device needs on-line cleaning
2 times.Apparatus of the present invention stain resistance is preferable, and cleaning frequency reduces.And calculate from aquifer yield, two
Individual device runs simultaneously, and apparatus of the present invention and existing curtain type membrane MBR device aquifer yield are respectively 3.24t/d
With 1.98t/d.As can be seen here, apparatus of the present invention save operating cost, reduce medicament expense use, and
After flux improves, in the case of identical inflow, floor space can be saved, reduce capital cost
Input.On the whole, a ton water consumption is reduced.
Claims (7)
1. a low energy consumption resistant to pollution MBR device, it is characterised in that this device is made up of with backwashing pump (11) water inlet pipe (1), aerator (2), aeration tank (3), diaphragm (4), exhaust-valve (5), vacuum meter (6), suction pump (7), effusion meter (8), flowing water Valve (9), film group device (10)；Described diaphragm (4) is the diaphragm that striking a layer thickness 75 ~ 85 m casting solution is formed on the screen cloth of percent opening 30-70%, at temperature 50 ~ 70 DEG C, 5 ~ 10min is soaked again in the coagulation bath being made up of 20%DMAC and 80% water, then in pure water, soak 8 ~ 12h, the diaphragm formed under conditions of then soaking with 30% glycerol；The pore structure of described diaphragm (4) be aperture be the spongy pore structure of 0.4 ~ 5.0 m.
MBR device the most according to claim 1, it is characterised in that described casting solution is made up of with 4 ~ 10 weight portion PEG8000 and 4 ~ 12 weight portion PVP 4 ~ 12 weight portion PVDF by weight, 70 ~ 85 weight portion DMAC.
MBR device the most according to claim 1, it is characterised in that described screen cloth is made up of terylene, nylon or composite fibre material.
MBR device the most according to claim 1, it is characterized in that described film group device (10) is dismountable, the two ends of every assembly are plug in construction, O RunddichtringO ensure to seal by the supporting construction of every assembly with film group device (10).
MBR device the most according to claim 1, it is characterised in that the hard spring that the described supporting construction steel wire of film group device (10), plastic steel wire or rigid plastics are made.
MBR device the most according to claim 1, the operating flux that it is characterized in that described film is 40 ~ 50LMH, this device uses the mode that combines with online backwash of intermittent duty, carries out online backwash resting gap, and the water yield of online backwash is 1.5 ~ 2 times of aquifer yield.
7. separate at mud mixed liquid according to the MBR device described in claim any one of claim 1-6, producing fruit juice or the purposes in highly filled concentrate solid-liquid separation during medicine.
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| CN109847588A (en) * | 2019-01-15 | 2019-06-07 | 天津工业大学 | The method that multi-phase flow technology slows down gas-lifting type tubular type fouling membrane |
| CN109663376A (en) * | 2019-01-31 | 2019-04-23 | 成都沃枘科技有限公司 | Aqueous organic liquid waste and organic solvent separation and recovery system and recovery method |
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| CN102120678A (en) * | 2011-03-24 | 2011-07-13 | 波鹰(厦门)科技有限公司 | Sewage recycling device based on electrolysis and membrane biological reactor technology and method thereof |
| CN102350231A (en) * | 2011-06-27 | 2012-02-15 | 张会艳 | Method for manufacturing polyvinylidene fluoride separation membrane |
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| CN100586537C (en) * | 2007-11-27 | 2010-02-03 | 北京市射线应用研究中心 | Reinforced microporous filter membrane and method and device for preparing the same |
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| CN102120678A (en) * | 2011-03-24 | 2011-07-13 | 波鹰(厦门)科技有限公司 | Sewage recycling device based on electrolysis and membrane biological reactor technology and method thereof |
| CN102350231A (en) * | 2011-06-27 | 2012-02-15 | 张会艳 | Method for manufacturing polyvinylidene fluoride separation membrane |
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