CN110436618A - A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field - Google Patents
A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field Download PDFInfo
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- CN110436618A CN110436618A CN201910731216.8A CN201910731216A CN110436618A CN 110436618 A CN110436618 A CN 110436618A CN 201910731216 A CN201910731216 A CN 201910731216A CN 110436618 A CN110436618 A CN 110436618A
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- membrane
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- electric field
- film
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Classifications
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2853—Anaerobic digestion processes using anaerobic membrane bioreactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C02F2303/14—Maintenance of water treatment installations
Abstract
A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field, including the electrode assembly outside the membrane module and reactor of inside reactor is arranged in, membrane module includes plate membrane, one piece of first copper sheet identical with film surface filter area size is embedded among plate membrane, first copper sheet is in the centre of film, it is not contacted with the solution in reactor, two pieces of second copper sheets identical with size in membrane module are installed in the reactor exterior wall, the electrode assembly includes power supply, the negative electrode of power supply is connect with the copper sheet being placed in membrane module, anode is connect with the second copper sheet being placed in outside reactor, liquid outlet is provided at the top of membrane module, liquid outlet is drained by pipeline.The present invention alleviates fouling membrane well, is a kind of analogy method that can be used as laboratory correlative study, and has practical application promotion prospect.
Description
Technical field
The present invention relates to fouling membrane technical field, in particular to a kind of anaerobic membrane bioreactor based on extra electric field and
Control membrane fouling method.
Background technique
The COD as existing for sanitary sewage (COD) is few, the low feature of organic loading rate (OLR), therefore right
Sanitary sewage needs big water in the process of processing, but will lead to the flux increase of film by increasing water, to increase
Big fouling membrane, fouling membrane are the key that limitation anaerobic membrane bioreactor 1 (AnMBR) processing sanitary sewage hinders.Fouling membrane meeting
Frequent Membrane cleaning is caused to reduce the service life of film and will increase the replacement cost of film, frequent Membrane cleaning can also increase
Add the cost of processing waste water.
Due to the importance of control membrane fouling, there has been proposed many mitigation strategies, they follow three directions: biogas
Body reflux is rinsed, and carrier, the development of various new membrane materials are added.Although biogas flows back, douching technique is mature, required energy
It consumes larger.Carrier is added into reactor, and there is also some disadvantages, and when reaching saturation such as carrier, carrying out processing to carrier is one
A extremely complex process carries out processing to carrier and also results in cost increase.Development for new membrane material, technology Shang Bucheng
Ripe, future also needs further to develop.Therefore find that a kind of to meet nowadays be necessary to the technology of control membrane fouling.
It is a kind of meet nowadays to the technology of control membrane fouling requirement to control membrane fouling using electric field.Protein, dirt
Mud is the important component of fouling membrane, and protein, sludge mainly have negative electricity, therefore the principle of this technology is to utilize negative electrode
Repulsive interaction is carried out to electronegative protein, sludge, to achieve the purpose that the pollution for alleviating film.The feature of this technology maximum
It is that low energy consumption, it is good alleviates fouling membrane effect.It is to alleviate fouling membrane that biogas interflow, which is washed away, in anaerobic membrane bioreactor
Most basic mode, but it is the process to consume energy very much that biogas interflow, which is washed away, thus the not only significant increase after electric field is added
Control membrane fouling effect, and total energy consumption is influenced less, therefore electric field pair is added in anaerobic membrane bioreactor
It is a kind of pair of very favorable behavior of control membrane fouling.The installation of electrode and there is construction letter using other opposite control methods
Singly, the features such as easily controllable, therefore carrying out control to fouling membrane using electric field is that one kind meets nowadays as control membrane fouling is wanted
The technology asked.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of anaerobism based on extra electric field
Membrane bioreactor film and its groundwater pollution control, present apparatus system mainly include that membrane module by transformation and one are required
Electrode assembly, so that membrane module is become cathode using electrode assembly, the copper sheet on the outside of reactor becomes anode, in film and two surveys
Electric field is formed between copper sheet, repulsive interaction is carried out to electronegative protein, sludge, to realize the purpose for alleviating fouling membrane.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of anaerobic membrane bioreactor based on extra electric field, including membrane module 2 inside reactor 1 and anti-is arranged in
The electrode assembly 5 outside device 1 is answered, membrane module 2 includes plate membrane, one piece of insertion and film surface filter area size among plate membrane
Identical first copper sheet 3, the first copper sheet 3 are in the centre of film, do not contact with the solution in reactor 1, outside the reactor 1
Two pieces of second copper sheets 4 identical and parallel with size in membrane module 2 are installed, the electrode assembly 5 includes power supply, electricity on portion's wall
The negative electrode in source is connect with the first copper sheet 3 being placed in membrane module 2, and anode connects with the second copper sheet 4 being placed in outside reactor 1
It connects, membrane module 2 is vertically placed in reactor, and top is provided with liquid outlet, and liquid outlet is drained by pipeline.
It is disposed with membrane pressure meter 6 and water outlet pump 7 on the pipeline, timer 8 is installed in the water outlet pump 7.
Biogas outlet, water inlet and gas port are provided at the top of the reactor 1, gas port passes through pipeline and position
Solarization air cell 8 in 1 bottom of reactor is connected, and gas pump 9 is equipped on pipeline.
The plate membrane is internally provided with diversion trench 10, and diversion trench 10 divides for trifid structure, 10 outlet end of diversion trench top
The side that portion summarizes is located at liquid outlet, and the other side is respectively that intermediate ends are located at plate membrane bottom, and another both ends are located at intermediate ends
Two sides and be in certain radian setting.
A kind of anaerobic membrane bioreactor control membrane fouling method based on extra electric field, includes the following steps；
Step 1: membrane module 2 of the production by transformation, and installed in exterior wall of the reactor 1 relative to film front surface
Two pieces of second copper sheets 4 identical with size in membrane module 2, open power supply, and two piece of second copper sheet 4 is formed between copper sheet 3 respectively
Consistent electric field；
Step 2:
Reactor 1 brings into operation, and electric field is in an opening state at this time, and the sewage into reactor 1 is filtered by film,
Treated, and waste water is discharged by the upper end outlet of membrane module 2；
Step 3:
After running a period of time, when transmembrane pressure reaches 30KPa, membrane module 2 is taken out from reactor 1, to film group
Part 2 is cleared up, and the membrane module 2 after cleaning re-starts use.
Beneficial effects of the present invention:
This installation method structure is simple, plays good relaxation effect to control membrane fouling by electric field.Operation result
Show that this device under electric field existence condition, alleviates fouling membrane well, is a kind of mould that can be used as laboratory correlative study
Quasi- method, and there is practical application promotion prospect.
Detailed description of the invention
Fig. 1 is the removal efficiency of COD in AnMBR.
Fig. 2 is fouling membrane performance (variation tendency that transmembrane pressure increases over time).
Fig. 3 is the cake layer thickness of film surface.
Fig. 4 is plate membrane structure diagram.
Fig. 5 is 1 structural schematic diagram of reactor.
Fig. 6 is overall structure diagram.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Fig. 4 Fig. 5: first part: by the membrane module 2 of transformation.Membrane module 2 is one piece of improved plate membrane,
One piece of copper sheet identical with film surface filter area size is embedded among plate membrane, copper sheet is in the centre of film, not with react
Solution contact in device 1.
It is as shown in Figure 6: second part: electrode assembly 5.Electrode assembly 5 is mainly by negative electrode, positive electrode and power supply group
At.The negative electrode of power supply is connect with the copper sheet being placed in membrane module 2, and anode is connect with the copper sheet being placed in outside reactor 1, from
And making the copper sheet among plate membrane negatively charged, the copper sheet of 1 two sides of reactor is negatively charged, controls albumen, dirt according to electric field repulsion
Aggregation of the electronegative substance such as mud wadding body to film surface.
The present invention is a kind of 1 control membrane fouling method of anaerobic membrane bioreactor based on extra electric field, and main includes warp
It crosses into membrane module 2,5 two parts of the electrode assembly composition for crossing transformation, specific implementation process is as follows:
Step 1: membrane module 2 of the production by transformation, and installed in exterior wall of the reactor 1 relative to film front surface
Two pieces of copper sheets identical with size in membrane module 2.By opening power supply, to form consistent electric field between two pieces of copper sheets.
Step 2:
Reactor 1 brings into operation, and electric field is in an opening state at this time, and the sewage into reactor 1 is filtered by film,
Treated, and waste water is discharged by the upper end outlet of membrane module 2.
Step 3:
After running a period of time, when transmembrane pressure reaches 30KPa, film is taken out from reactor 1, film is carried out clear
Reason, film after cleaning from newly carry out using.
By DC Electric Field, the negatively charged substance such as albumen and sludge wadding body is effectively controlled in film surface and forms dirt
Object is contaminated, AnMB control membrane fouling effect is enhanced.
This method is suitable for the relatively low control membrane fouling of sanitary sewage this COD, VSS (5-6g/L), when in system
When VSS too high levels, there are insolubles content excess, increase so as to cause viscosity of mixed liquid in reactor 1, influence this method
Control membrane fouling effect.
Present apparatus positive and negative anodes are in fully sealed position and do not contact with blended liquid phase.Its main feature has device construction letter
Single, easily controllable and electrode will not have an adverse effect with pollutant.
The waste water that this experiment uses is sanitary sewage, the features such as organic loading rate is low in sanitary sewage, therefore film is easier
It is contaminated, so electric field is added to reduce the pollution of film.As shown in Figure 1,1 film of reactor has in 30 days at good sewage
Manage effect.Into sewage in reactor 1 COD amount in a high value, and COD is then maintained at a low value in being discharged, therefore
Total COD removal rate in anaerobism membrane reactor 1 is always in a higher range.Illustrate after using the present apparatus, reactor 1 can be grown
Phase to Organic substance in water processing keep a stabilization, efficient state, and in the consumption of the energy with the anti-of electrode is not installed
Device 1 is answered to compare, there is no too big differences.
This experiment has used the control group for not installing electrode assembly 5.As shown in Fig. 2, compare experimental group and control group across
Membrane pressure poor (TMP) changes over time trend.It can be seen that before TMP transition occurs, the gentle phase phase of the TMP growth of experimental group
47% is extended for control group, the TMP rate of rise of experimental group and control group is respectively 0.29KPa/d, 0.08KPa/d, real
After testing the main reason for TMP rate of rise of group is slightly larger than control group and may being switched on, film strips negative electricity, sun in sanitary sewage from
Son such as Ca2+, Mg2+It is adsorbed to film surface, slight fenestra is caused to pollute.The TMP of experimental group and control group increases after transition
Rate is respectively 2.94kPa, 5.37kPa.The TMP rate of rise of experimental group is considerably slower than control group, this is mainly due to electric field
In the presence of inhibiting electronegative sludge, protein attachment to film surface, to alleviate TMP rate of rise.It can be said that bright
The presence of electric field controls the pollution of film very well.
Fig. 3 is the sectional view of film surface cake layer thickness after electric field is added.Film surface cake layer is thick with a thickness of 77.3 μm
It spends obviously thinning relative to other documents.After electric field is added, film surface major pollutants are microbial contamination, graininess pollution
Object only occupies few part.Therefore most of pollutant is inhibited after electric field is added.
Based on the above results, COD in sanitary sewage is not only realized by the membrane module 2 after addition electric field well
It removes, and controls the pollution rate of film.And the presence of electric field is also at a lower range to the consumption of the energy.
Claims (5)
1. a kind of anaerobic membrane bioreactor film based on extra electric field, which is characterized in that internal in reactor (1) including setting
Membrane module (2) and the external electrode assembly (5) of reactor (1), membrane module (2) includes plate membrane, insertion one among plate membrane
Block the first copper sheet (3) identical with film surface filter area size, the first copper sheet (3) are in the centre of film, not with reactor (1)
In solution contact, two pieces of second copper sheets identical with membrane module (2) interior size are installed in the reactor (1) exterior wall
(4), the electrode assembly (5) includes power supply, and the negative electrode of power supply is connect with the copper sheet being placed in membrane module (2), anode
Second copper sheet (4) external with reactor (1) is placed in is connect, and is provided with liquid outlet at the top of membrane module (2), liquid outlet passes through
Pipeline is drained.
2. a kind of anaerobic membrane bioreactor film based on extra electric field according to claim 1, which is characterized in that described
Pipeline on be disposed with membrane pressure meter (6) and water outlet pump (7), timer (8) are installed in the water outlet pump (7).
3. a kind of anaerobic membrane bioreactor film based on extra electric field according to claim 1, which is characterized in that described
Reactor (1) at the top of be provided with biogas outlet, water inlet and gas port, gas port by pipeline be located at reactor
(1) solarization air cell (8) of bottom is connected, and gas pump (9) are equipped on pipeline.
4. a kind of anaerobic membrane bioreactor film based on extra electric field according to claim 1, which is characterized in that described
Plate membrane be internally provided with diversion trench (10), diversion trench (10) is divided into trifid structure, summarizes at the top of diversion trench (10) outlet end
Side be located at liquid outlet, the other side is respectively that intermediate ends are located at plate membrane bottom, another both ends be located at intermediate ends two sides and
In the setting of certain radian.
5. a kind of anaerobic membrane bioreactor control membrane fouling method based on extra electric field, which is characterized in that including following step
Suddenly；
Step 1: membrane module (2) of the production by transformation, and installed in exterior wall of the reactor (1) relative to film front surface
Two pieces of second copper sheets (4) identical with membrane module (2) interior size, by opening power supply, thus shape between two piece of second copper sheet (4)
At consistent electric field；
Step 2:
Reactor (1) brings into operation, and electric field is in an opening state at this time, and the sewage into reactor (1) is filtered by film,
Treated, and waste water is discharged by the upper end outlet of membrane module (2)；
Step 3:
After running a period of time, when transmembrane pressure reaches 30KPa, membrane module (2) is taken out from reactor (1), to film group
Part (2) is cleared up, the membrane module (2) after cleaning from newly carry out using.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910731216.8A CN110436618A (en) | 2019-08-08 | 2019-08-08 | A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field |
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| CN201910731216.8A CN110436618A (en) | 2019-08-08 | 2019-08-08 | A kind of anaerobic membrane bioreactor and control membrane fouling method based on extra electric field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113698041A (en) * | 2021-09-07 | 2021-11-26 | 山西蓝拓环保工程有限公司 | Magnetic/electric reinforced composite membrane biological reaction rural sewage treatment device and treatment method |
| CN114159974A (en) * | 2021-11-25 | 2022-03-11 | 西安理工大学 | High-voltage electrostatic field control MBR membrane pollution pretreatment device |
| CN114159974B (en) * | 2021-11-25 | 2024-04-30 | 西安理工大学 | High-voltage electrostatic field control MBR membrane pollution pretreatment device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113698041A (en) * | 2021-09-07 | 2021-11-26 | 山西蓝拓环保工程有限公司 | Magnetic/electric reinforced composite membrane biological reaction rural sewage treatment device and treatment method |
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Application publication date: 20191112 |
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