CN108483620A - A kind of electricity idetified separation film alleviates the device of fouling membrane synchronization promotion methane phase - Google Patents
A kind of electricity idetified separation film alleviates the device of fouling membrane synchronization promotion methane phase Download PDFInfo
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- CN108483620A CN108483620A CN201810337682.3A CN201810337682A CN108483620A CN 108483620 A CN108483620 A CN 108483620A CN 201810337682 A CN201810337682 A CN 201810337682A CN 108483620 A CN108483620 A CN 108483620A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/005—Combined electrochemical biological processes
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The present invention provides a kind of electric idetified separation films to alleviate the device that fouling membrane synchronizes promotion methane phase, membrane separation technique, anaerobe technology and bioelectrochemistry technology are organically combined, it is related to technical field of sewage, invention device is integral type immersion type anaerobic film bioreactor, including reactor body, separating film module, three phase separator, pressure-detecting device, water pump, temperature control device, for electric installation etc., wherein conductive material is used to make separating film module, filtering and the double action of biological-cathode are made it have, following effect can be reached：On the one hand sludge loss is reduced by retention, while acts on the generation for alleviating fouling membrane by electrostatic repulsion in film surface application electrical bias；On the other hand, electroactive microorganism growth metabolism, the efficiency that organic matter converts in reinforced anaerobic reaction is stimulated to improve treatment effeciency and effluent quality, and the energy to be recycled in a manner of biogas from sewage, supplement operation energy consumption by the introducing of electric field.
Description
Technical field
The present invention relates to a kind of electric idetified separation films to alleviate the device that fouling membrane synchronizes promotion methane phase, belongs to sewage disposal
Technical field.
Background technology
In recent years, anaerobic membrane bioreactor is received significant attention as a kind of new technology in sewage treatment field, it is
The coupling of membrane separation technique and Anaerobic Biotechnology, the advantages of both combining, have sludge yield is few, effluent quality is good, with
And the advantages that energy regenerating.But the yield and conversion ratio due to energy gas are to be improved, membrane pollution problem it is serious and
The cost brought increases, and constrains its large-scale application, therefore takes appropriate measures and promote aerogenesis, control and alleviation fouling membrane,
And conjunctival feature carries out reactor optimization as critical issue.
Studies have shown that fouling membrane Crack cause is mainly concentration polarization, Pore Blocking and surface deposition, wherein deposition
The formation of layer is main cause.Sedimentary is mainly made of microorganism, extracellular polymeric (EPS), dissolved organic matter (SMP),
These substances, which deposit in film surface or form interaction force between membrane material, leads to the generation of fouling membrane.Due to EPS and SMP etc.
Main membrane contaminant itself is negatively charged, can be by applying hair of the negative electricity using electric field repulsion effect decelerating membrane pollution in film surface
It is raw.Therefore in membrane bioreactor, film surface is modified with conductive material or directly utilizes conductive material preparative separation film, for solution
Certainly the above problem provides a kind of new approaches.
Conductive separation membrane material includes inorganic metallic materials, conducting polymer and conductive carbon material, due to having chemically
The advantages such as matter stabilization, good conductivity, excellent chemical resistance and good engineering properties so that such material has wide
Wealthy Research Prospects.And conductive material seperation film has excellent electrology characteristic, to realize that electrochemistry assists membrane separating process
Provide guarantee.Under electrochemistry subsidiary conditions, existing electrostatic force between pollutant and film surface, the electrification of film surface
Reaction and electrodynamics phenomenon etc. is learned to be expected to become the factor for alleviating fouling membrane.Meanwhile during anaerobic bio-treated,
Hydrolysis acidification bacterium and methanogen floras play a major role, and electric field appropriate introduces can be by stimulating electroactive microorganism to grow generation
It thanks, actively impact, the efficiency that organic matter converts in reinforced anaerobic reaction, to carry can be generated to the property of microorganism, sludge
High treatment efficiency and effluent quality, and the energy can be recycled in a manner of biogas from sewage, supplement operation energy consumption.
Invention content
The present invention organically combines membrane separation technique, anaerobe technology and bioelectrochemistry technology, main purpose
It is to strengthen the generation for alleviating fouling membrane in anaerobic membrane bioreactor by electricity, while promoting the generation of energy gas methane.Profit
With the electrochemical properties that conductive material is excellent, on the one hand, make system under electrochemistry subsidiary conditions, pass through pollutant and film surface
Between electric flocculation effect between existing electrostatic force, pollutant, the electrochemical reaction of film surface and bubble wash away
The generation of fouling membrane is alleviated in effect；On the other hand, it is given birth to by introducing electrical field stimulation reaction zone and the electroactive microorganism of electrode surface
Long metabolism, increases hydrolysis acidification bacterium and methanogen Monopterus albus, promotes the extracellular inter-species electricity of anaerobe between the electrodes
Son transmits, the transformation efficiency of organic matter, intermediate product and cell metabolite in reinforced anaerobic reaction, to improve treatment effeciency
With biogas yield.
Technical scheme of the present invention：
A kind of electricity idetified separation film alleviates the device of fouling membrane synchronization promotion methane phase, and reactor is that integral type immersion is detested
Aerobic membrane bioreactor is inside filled with anaerobic sludge 15, is wrapped with insulating layer 12；Reactor bottom is equipped with water inlet,
Intake chamber 1 is entered to through water inlet in the sludge reaction area of reactor by intake pump 2；The end cap of reactor head is equipped with gas
Sample tap 5 and UF membrane water outlet 6, UF membrane water outlet 6 are located at center, and UF membrane water outlet 6 is by pipeline through water outlet pump 16
It is passed through effluent trough 17, pipeline is equipped with pressure vacuum gauge 4；Reactor top, side wall are equipped with reactor water outlet 9, are located at three
The top of phase separator 8；Mud baffle 11 is equipped at the lower port of three phase separator 8；UF membrane water outlet 6 is ladder circle column tube,
One end is stretched out from reactor end cap, and the other end connects membrane module tube body 7；Conductive seperation film cathode 14 is located in reactor, immerses
Sludge reaction area and sludge suspension area, the upper end are fixed by Conductive sealant 10 and membrane module tube body 7；Conducting sleeve anode 13
It is sleeved on outside conductive seperation film cathode 14, and is fixed；External powering device 3 is separately connected conducting sleeve anode 13 and conductive separation
Film cathode 14 provides voltage for reactor system.
The conductive seperation film cathode 14 is all made of conductive material, is connected by Conductive sealant adhesion or by conducting wire
At the form of membrane module.Separation membrane material can be single conductive material seperation film, support type conductive material seperation film or conduction
One kind in mixed-matrix seperation film or any type of combination, the specific manifestation form of film be tubular membrane, capillary type film, in
Empty fiber membrane or rolled film.
13 material of conducting sleeve anode is stainless (steel) wire with good conductivity, titanium net, carbon felt or carbon cloth.
The device technique method, operational process are：Conducting sleeve anode 13 and conductive seperation film cathode 14 are placed in
Reactor middle and lower part is immersed sludge reaction area and sludge suspension area, is in direct contact with anaerobic sludge 15；After the degassing of sewage mixing,
Sludge reaction area in reactor bottom is entered by water inlet through intake pump, is reacted through anaerobe in anaerobic sludge 15
Afterwards, after being filtered by conductive seperation film cathode 14, separation water outlet, by adjusting intake pump 2, water outlet pump 16 makes liquid level in reactor
It keeps balance and is run with permanent flux conditions, open external powering device 3, provide voltage for reactor system, react generation
Energy gas forms minute bubbles and is discharged from anaerobic sludge 15 in water, is collected by gas sample mouth through three phase separator 8.
Temperature control device can be added according to reaction temperature requirement.
Water inlet in the intake chamber is sanitary sewage, business sewage or industrial wastewater.
Compared with prior art, technical scheme of the present invention has the advantages that：
1) electric idetified separation film used by the anaerobic membrane bioreactor in the present invention, preparation process is simple, not only has
The screening crown_interception of standby tradition UF membrane, also has excellent chemical property, can accelerate electronics in sewage disposal process
It transmits and promotes organic matter degradation, and the service life that fouling membrane extends seperation film is controlled by electrochemical action, meanwhile, with stainless
Steel mesh, titanium net, carbon felt or carbon cloth reduce cost of investment as anode.
2) heretofore described electric idetified separation film has the double action of filter membrane and biological-cathode, can reach with
Lower effect：On the one hand sludge loss is reduced by retention, while applies electrical bias in film surface and is alleviated by electrostatic repulsion effect
The generation of fouling membrane；On the other hand, electroactive microorganism growth metabolism is stimulated by the introducing of electric field, had in reinforced anaerobic reaction
The efficiency of machine object conversion, to improve treatment effeciency and effluent quality, and can recycle energy from sewage in a manner of biogas
Source supplements operation energy consumption.
3) present invention in device be integral type immersion type anaerobic film bioreactor, cathode and anode directly with the micro- life of anaerobism
Object contacts, and has not only increased the contact area for adding waste water and electrode, but also provide favorable environment for the growth of microorganism, has significantly carried
High treatment effeciency.
Description of the drawings
Fig. 1 is that a kind of synchronized using electric idetified separation film alleviation fouling membrane of the present invention promotes the apparatus structure of methane phase to illustrate
Figure.
Fig. 2 is that electric enhanced reactor runs later stage carbon nanotube doughnut in control open circuit reactor in the present invention
Film passes through the exterior view (A, B) and sectional view (C, D) of hydrodynamic cleaning caudacoria
In figure：1 intake chamber；2 intake pumps；3 external powering devices；4 pressure vacuum gauges；5 gas sample mouths；
6 UF membrane water outlets；7 membrane module tube bodies；8 three phase separators；9 reactor water outlets；
10 Conductive sealants；11 mud baffles；12 insulating layers；13 conducting sleeve anodes；
14 conductive seperation film cathodes；15 anaerobic sludges；16 water outlet pumps；17 effluent troughs.
Specific implementation mode
With reference to technical solution and attached drawing, description of specific embodiments of the present invention.
Embodiment：Electricity strengthens Carbon-nanotube hollow fiber membrane bioreactor for treatment low-concentration organic waste water
As shown in Figure 1, described device by reactor body, Carbon-nanotube hollow fiber membrane component 7, pressure vacuum gauge 4, into
The compositions such as water pump 2, insulating layer 12, low-voltage dc power supply 3 and conducting wire, wherein water inlet regulating reservoir 1 into peristaltic pump 2 through passing through water inlet
Pipe is connected with 15 bottom of sludge reaction layer in reactor cylinder body；Reactor body is the tubular structure that dischargeable capacity is 1L；Carbon is received
Mitron hollow fiber film assembly 7 is all made of carbon nanotube, and the modeling uniformly punched is placed at a branch of by Conductive sealant adhesion
Membrane module is used as in expects pipe, setting out the mouth of a river 6 at the top of component is connected by fluid sealant with reactor head outlet pipe, is placed in reactor master
Body location mid-shaft, and connect vacuum pump suction water outlet；DC power supply 3 is set to except reactor body, film group in operational process
Part is connected by conducting wire with DC power cathode, and outer shroud setting stainless (steel) wire sleeve, which is used as, is connected to electrode with positive pole,
Applied voltage -1.0V；Reactor temperature is set to maintain around package one layer of heat preservation layer 12 by heating cloth outside reactor body
18±2℃；Reactor head is equipped with gas sample mouth 5, and right side middle and upper part is equipped with water outlet 9.
It is as follows that the present embodiment obtains carrying out practically process：
Seed sludge is added from bottom into reactor body, sludge quantity is about the 20% of reactor dischargeable capacity, water inlet
Ingredient is manual simulation's middle and high concentration sanitary sewage, and simulation water distribution COD concentration is about 500 ± 50mg/L, daily one
Match, be uniformly mixed and used after deaerating；The continuous up-flow operation of reactor, reactor temperature are set in 18 ± 2 DEG C, and HRT is
8h；Low-voltage dc power supply 3 is opened, so that membrane module is passed through conducting wire and is connected with DC power cathode, stainless steel net cover is arranged in outer shroud
For cylinder as being connected with positive pole by conducting wire to electrode, application voltage is -1.0V；By film filtration effluent while water inlet,
Rotating speed by adjusting water-in and water-out peristaltic pump makes liquid level in reactor keep balance and be run with permanent flux conditions；Waste water is through dirt
The gas generated after anaerobic microbial conversion in mud is collected by collection gas port 5.
While the i.e. not powered anaerobism Carbon-nanotube hollow fiber membrane bioreactor of open circuit is set under the same conditions, two
Group reactor runs parallel, and the variation of transmembrane pressure is observed by detaching the connected pressure vacuum gauge 4 of water outlet with top-film, across
Membrane pressure difference is bigger, indicates that membrane pollution resistance is more serious；COD removal situation and gas production are measured simultaneously, to see
Examine the influence that electric field runs whole system.Final result shows in the operation of Heng Tong amount, under the action of back bias voltage, transmembrane pressure
The ascendant trend of difference obviously slows down, and also more easy cleaning, the film surface after washing can substantially restore initial shape to the pollutant of film surface attachment
State (A, B), and see that internal fenestra also remains intact (C, D) by being compared in Fig. 2, and compare and only wash off a small amount of attachment, it washes
Film surface afterwards still covers one layer of pollutant, and sectional view is not it has also been found that almost see internal fenestra, the effect of electric field described above
Under be not only able to contaminant restraining and assemble in film surface, and Pore Blocking can be slowed down, pollution is made to become reversible.Meanwhile from
From the point of view of organic matter removal and transformation efficiency, by the technology of the present invention, treated that chemical oxygen demand of waste water reaches level-one A standards, first
Alkane yield improves 25.6%, and abundance of the methagen Methanobacterium to play a major role on cathode greatly improves,
It is 3.7 times of control.
Claims (10)
1. a kind of electricity idetified separation film alleviates fouling membrane and synchronizes the device for promoting methane phase, which is characterized in that reactor is integrated
Formula immersion type anaerobic film bioreactor is inside filled with anaerobic sludge (15), is wrapped with insulating layer (12)；Reactor bottom
Portion is equipped with water inlet, and intake chamber (1) is entered to through water inlet in the sludge reaction area of reactor by intake pump (2)；Reactor
The end cap at top is equipped with gas sample mouth (5) and UF membrane water outlet (6), and UF membrane water outlet (6) is located at center, and UF membrane goes out
The mouth of a river (6) is passed through effluent trough (17) by pipeline through water outlet pump (16), and pipeline is equipped with pressure vacuum gauge (4)；Reactor top,
Side wall is equipped with reactor water outlet (9), is located at the top of three phase separator (8)；It is equipped at the lower port of three phase separator (8)
Mud baffle (11)；UF membrane water outlet (6) is ladder circle column tube, and one end is stretched out from reactor end cap, and the other end connects membrane module
Tube body (7)；Conductive seperation film cathode (14) is located in reactor, immerses sludge reaction area and sludge suspension area, the upper end passes through
Conductive sealant (10) is fixed with membrane module tube body (7)；Conducting sleeve anode (13) is sleeved on conductive seperation film cathode (14) outside, and
It is fixed；External powering device (3) is separately connected conducting sleeve anode (13) and conductive seperation film cathode (14), is reactor body
System provides voltage.
2. electricity idetified separation film according to claim 1 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature exists
In the conductive seperation film cathode (14) is all made of conductive material, is connected by Conductive sealant adhesion or by conducting wire
The form of membrane module；Separation membrane material is conductive material seperation film, support type conductive material seperation film, conductive mixed-matrix separation
The specific manifestation form of one kind in film or any type of combination, film is tubular membrane, capillary type film, hollow-fibre membrane or volume
Formula film.
3. electricity idetified separation film according to claim 1 or 2 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature
It is, described conducting sleeve anode (13) material is stainless (steel) wire with good conductivity, titanium net, carbon felt or carbon cloth.
4. electricity idetified separation film according to claim 1 or 2 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature
It is, operational process is：Conducting sleeve anode (13) and conductive seperation film cathode (14) are placed in reactor middle and lower part, immerse dirty
Mud reaction zone and sludge suspension area, are in direct contact with anaerobic sludge (15)；After the degassing of sewage mixing, pass through water inlet through intake pump
Sludge reaction area in reactor bottom is entered, after anaerobe reaction in anaerobic sludge (15), passes through conductive seperation film
After cathode (14) filtering, separation water outlet makes liquid level in reactor keep balance simultaneously by adjusting intake pump (2), water outlet pump (16)
It is run with permanent flux conditions, opens external powering device (3), provide voltage for reactor system, react the energy gas of generation
Body forms minute bubbles release from anaerobic sludge (15) in water, is collected by gas sample mouth through three phase separator (8).
5. electricity idetified separation film according to claim 3 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature exists
In operational process is：Conducting sleeve anode (13) and conductive seperation film cathode (14) are placed in reactor middle and lower part, immerse sludge
Reaction zone and sludge suspension area, are in direct contact with anaerobic sludge (15)；Sewage mixing degassing after, through intake pump by water inlet into
Enter into reactor bottom sludge reaction area, after anaerobe reaction in anaerobic sludge (15), passes through conductive seperation film the moon
After the filtering of pole (14), separation water outlet, by adjusting intake pump (2), water outlet pump (16) make in reactor liquid level keep balance and with
Permanent flux conditions operation, opens external powering device (3), provides voltage for reactor system, react the energy gas of generation
Minute bubbles release from anaerobic sludge (15) is formed in water, is collected by gas sample mouth through three phase separator (8).
6. the electric idetified separation film according to claim 1,2 or 5, which alleviates fouling membrane, synchronizes the device for promoting methane phase, special
Sign is, according to reaction temperature requirement, adds temperature control device.
7. electricity idetified separation film according to claim 3 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature exists
According to reaction temperature requirement, adding temperature control device.
8. electricity idetified separation film according to claim 4 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature exists
According to reaction temperature requirement, adding temperature control device.
9. the electric idetified separation film according to claim 1,2,5,7 or 8, which alleviates fouling membrane, synchronizes the device for promoting methane phase,
It is characterized in that, the water inlet in the intake chamber is sanitary sewage, business sewage or industrial wastewater.
10. electricity idetified separation film according to claim 6 alleviates fouling membrane and synchronizes the device for promoting methane phase, feature exists
In the water inlet in the intake chamber is sanitary sewage, business sewage or industrial wastewater.
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| CN110078333A (en) * | 2019-05-16 | 2019-08-02 | 华东师范大学 | A kind of anaerobism electrochemistry sludge treatment equipment of electrode coupling plate membrane |
| CN110182943A (en) * | 2019-05-09 | 2019-08-30 | 北京林业大学 | A kind of efficient process used water difficult to degradate anaerobic dynamic film reactor |
| CN110436618A (en) * | 2019-08-08 | 2019-11-12 | 西安建筑科技大学 | A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field |
| CN110526346A (en) * | 2019-09-19 | 2019-12-03 | 中国科学院生态环境研究中心 | A kind of electrochemistry anaerobic membrane biosystem sewage-treatment plant and its processing method |
| CN110694496A (en) * | 2019-10-14 | 2020-01-17 | 北京工业大学 | Preparation method and application of carbon nanotube surface modified hollow fiber membrane |
| CN111153506A (en) * | 2019-09-23 | 2020-05-15 | 北京工业大学 | Anaerobic electrochemical membrane bioreactor and water treatment method thereof |
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| CN109384307A (en) * | 2018-11-21 | 2019-02-26 | 大连理工大学 | It is a kind of using electrochemically strengthening Carbon-nanotube hollow fiber membrane as the membrane bioreactor of separative unit |
| CN110182943A (en) * | 2019-05-09 | 2019-08-30 | 北京林业大学 | A kind of efficient process used water difficult to degradate anaerobic dynamic film reactor |
| CN110182943B (en) * | 2019-05-09 | 2021-12-28 | 北京林业大学 | Anaerobic dynamic membrane reactor for efficiently treating refractory wastewater |
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