CN1278954C - Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor - Google Patents
Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor Download PDFInfo
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- CN1278954C CN1278954C CN 200410009684 CN200410009684A CN1278954C CN 1278954 C CN1278954 C CN 1278954C CN 200410009684 CN200410009684 CN 200410009684 CN 200410009684 A CN200410009684 A CN 200410009684A CN 1278954 C CN1278954 C CN 1278954C
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- 239000012528 membrane Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004140 cleaning Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000010802 sludge Substances 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005273 aeration Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 239000011538 cleaning material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Activated Sludge Processes (AREA)
Abstract
The present invention relates to a method and an apparatus for cleaning an on-line ultrasonic cavitation membrane-bioreactor, and particularly to a novel method and the apparatus for cleaning the membrane-bioreactor which is used for treating water and wastewater. The on-line ultrasonic cavitation membrane-bioreactor of the present invention comprises a water inlet pump, a bioreactor, a membrane component and a water outlet pump connected with the membrane component which is arranged in the bioreactor. The present invention is characterized in that an ultrasonic generator is arranged in the bioreactor, the ultrasonic generator is connected with a control apparatus arranged outside the ultrasonic generator, and a water outlet pipe of the membrane assembly is provided with a differential pressure meter which is connected with an ultrasonic control apparatus by a signal wire. The method and the apparatus do not need to take the membrane component out of the bioreactor, and the present invention has the advantages of simple operation procedure, short required period, simple apparatus structure, stable operation and convenient automatic operation and control. In addition, the sludge in the bioreactor is reduced when ultrasonic cavitation is carried out, which is favorable to long-term stable operation of the membrane-bioreactor.
Description
Technical field
The present invention relates to the film-bio-reactor purging method and the device of a kind of novel treatment water and waste water, relate in particular to a kind of on-line ultrasonic cavitation film-bioreactor process and realize the device of this method.
Background technology
The shortage of water resources problem has become obstruction social economy's Sustainable development and has influenced the stable important restraining factors of social life.1/4 of the only suitable world of China's water resource of per capita water resources ownership per capita occupy the 110th in the world, and spatial and temporal distributions is very inhomogeneous.It is reported in 668 cities of China, about 400 of lack of water city, the city of serious water shortage is above 100.Especially in recent years, along with socioeconomic fast development, industrial or agricultural water demand amount increases rapidly, and water resource waste and water resource pollution problem are on the rise, and makes China's shortage of water resources problem more outstanding.
For a long time, people were usually using water once to call sewage, Xia Shui, and this water and dirt, dirty image are interrelated.In fact human used water pollutes impurity and only accounts for about 0.1%, is significantly less than the level of seawater 3.5%.Sewage can reuse through after the suitable manipulation of regeneration, realizes the optimum systemic circulation of water at occurring in nature.Municipal effluent have nearby can get, be easy to collect, enormous amount, reliable and stable characteristics, come actually as second water source, city than seawater, rainwater urban sewage recycling, more much lower than the long distance water diversion investment.Reusing sewage can greatly be alleviated the imbalance between supply and demand of water on the one hand, can thoroughly improve the present situation that water pollutes on the other hand, makes waste water become available resource again.Therefore municipal sewage treatment and reuse have become the protection water surrounding, solve the important channel of shortage of water resources problem.
It is good that film-bio-reactor (Membrane Bioreactor-MBR) has an effluent quality, but water outlet direct reuse, occupation area of equipment is little, excess sludge production is low and be convenient to advantage such as automatically control, and its application is the effective means of solution China shortage of water resources problem with promoting.But the film pollution that produces in film-bio-reactor operational process can cause membrane flux to reduce or resistance of membrane filtration rises, and directly influences the producing water ratio of system and increases operation energy consumption; The film pollution level has also determined the parallel-adder settle-out time of film simultaneously, influences working costs such as film cleaning.As seen to pollute be influence one of the most key factor that membrane technique applies to film, and strategy and the technology of therefore studying the controlling diaphragm pollution just seem particularly important.For the controlling diaphragm pollution problem, the investigator has successively made big quantity research and has obtained certain progress both at home and abroad, but all there is certain weak point in these means, really effectively are still less in actual applications.
Film-bio-reactor purging method is divided into off-line cleaning and on-line cleaning at present, and off-line cleans and membrane module need be taken out from bio-reactor, is put into then in the scavenging solution and carries out, and the whole process cycle is long and loaded down with trivial details.The on-line cleaning method mainly contains two kinds at present, a kind of is to adopt acid solution or alkali lye etc. to carry out matting, promptly at set intervals chemical liquid is oppositely injected membrane module, but adopt matting can damage mould material and generation secondary pollution, wash procedure is also more loaded down with trivial details in addition.Another kind method is to adopt water, gas or air water mixed solution to carry out pulse backwashing, though it has certain effect to the lower concentration particles of solute, cleaning performance is unsatisfactory when being used to contain the MBR active sludge intermixture of microorganism, macromolecular substance.Therefore the efficient on-line cleaning technology of development of new is significant to applying of membrane bioreactor.
Ultrasonic cavitation technology in recent years is used as the effective means on cleaning material surface, and the bubble of ultrasonic generation can produce enough energy when collapsing and overcome pollutent and material surface interactions, and then removes the surface contamination material.The off-line ultrasonic cavitation is cleaned film and is polluted existing relevant report, and it is the membrane module after polluting to be taken off to be put in the ultrasonic cleaning equipment carry out, and studies show that it has good cleaning performance to pollutent.But the off-line ultrasonic cavitation is cleaned and membrane module need be taken out in bio-reactor, has the program complexity, complex operation, and the required cycle is long, and has only the professional and technical personnel just can implement.The film pollution control that the ultrasonic cavitation technology is used for on-line cleaning film-bio-reactor does not still have report at present both at home and abroad.
Summary of the invention
The present invention is directed to the deficiency of existing film-bio-reactor purging method, a kind of device of on-line ultrasonic cavitation film-bio-reactor is provided, this device can overcome the off-line ultrasonic cavitation clean membrane module need be taken out in the bio-reactor, program complexity, complex operation, the required cycle is long and the shortcoming of having only the professional and technical personnel just can implement.
Another object of the present invention provides a kind of method of implementing described device, this method can form enough energy when adopting ultrasonic generation bubble to collapse and overcome pollutent and material surface interactions, and then remove film surface contamination material and come rinsing membrane module, and stable, be convenient to automated operation and control.
Technical scheme of the present invention is as follows:
A kind of on-line ultrasonic cavitation film-bioreactor device, contain intake pump, bio-reactor, be arranged on membrane module in the bio-reactor, be connected with membrane module go out water pump, it is characterized in that: the distance of this ultrasonic generator and membrane module is 5～100cm, and is connected with a control device that is arranged on the outside; A differential manometer is housed on described membrane module rising pipe, and this differential manometer links to each other with described ultrasonic control device by signal wire.
The present invention also provides the method for the above-mentioned on-line ultrasonic cavitation film-bioreactor device of a kind of employing, and this method comprises the following steps:
(1) pending former water is risen in the bio-reactor by intake pump, and membrane module is through going out water pump suction water outlet, by differential manometer record transmembrane pressure;
(2) when transmembrane pressure reached in 10～100kPa scope, control device gave the ultrasonic generator feedback signal, and ultrasonic generator is started working and membrane module carried out ultrasonic cavitation clean; Described ultrasonic power is 100～1000W, and ultrasonic frequency is 20～60kHz; Each ultrasonic time is 0.5～30 minute.
The present invention compared with prior art has the following advantages and the high-lighting effect: the present invention need not membrane module is taken out in bio-reactor, and schedule of operation is easy, and the required cycle is short, and apparatus structure is simple, stable, is convenient to automated operation and control.In addition, in ultrasonic cavitation, can realize the mud decrement in the bio-reactor, help the long-term stability operation of film-bio-reactor.
Description of drawings
Fig. 1 is the structural representation of device of the present invention.
Fig. 2, Fig. 3 are on-line ultrasonic cavitation effect design sketch over time.
Among the figure: the former water of 1-, the 2-intake pump, the 3-bio-reactor, the 4-membrane module, the 5-ultrasonic generator, the 6-gas blower, the 7-aeration tube, the ultrasonic control device of 8-, the 9-differential manometer, 10-goes out water pump, the 11-water outlet.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention, structure and working process are further described.
On-line ultrasonic cavitation film-bioreactor device provided by the invention, comprise former water 1, intake pump 2, bio-reactor 3, be arranged on membrane module 4 in the bio-reactor, be connected with membrane module go out water pump 10; The distance of this ultrasonic generator and membrane module is 5～100cm, and is connected with a control device that is arranged on the outside; A differential manometer is housed on described membrane module rising pipe, and this differential manometer links to each other with described ultrasonic control device by signal wire.As shown in Figure 1, pending former water 1 enters in the bio-reactor 3 after going out intake pump 2 liftings, aspirate water outlet 11 through going out 10 pairs of membrane modules 4 of water pump, carry out aeration aerating by mixed solution in gas blower 6 and 7 pairs of bio-reactors of aeration tube during this time, provide the cross-flow flow velocity with flush clean to membrane module 4 simultaneously, behind system's operation certain hour, after differential manometer 9 shows that transmembrane pressure reaches 10～100kPa scope, ultrasonic control device 8 control ultrasonic generators 5 are started working, and membrane module 4 is carried out ultrasonic cavitation clean.Described ultrasonic power is 100～1000W, and ultrasonic frequency is 20～60kHz; Each ultrasonic time is 0.5～30 minute.
Following listed examples is used for illustrating effect of the present invention, but claim scope of the present invention is not limited only to this.
Embodiment 1: sludge concentration is 5mg/L in bio-reactor, and ultrasonic power is 100W, and ultrasonic frequency is 60kHz, and ultrasonic time is 30 minutes, and then ultrasonic cavitation to the cleaning performance of film-bio-reactor as shown in Figure 2.
Embodiment 2: sludge concentration is 8mg/L in bio-reactor, and ultrasonic power is 1000W, and ultrasonic frequency is 20kHz, and ultrasonic time is 0.5 minute, and then ultrasonic cavitation to the cleaning performance of film-bio-reactor as shown in Figure 3.
Claims (2)
1. on-line ultrasonic cavitation film one biological reactor assembly, contain intake pump (2), bio-reactor (3), be arranged on membrane module (4) in the bio-reactor, be connected with membrane module go out water pump (10), it is characterized in that: in bio-reactor, be provided with ultrasonic generator (5), the distance of this ultrasonic generator and membrane module is 5～100cm, and is connected with a control device (8) that is arranged on the outside; A differential manometer (9) is housed on described membrane module rising pipe, and this differential manometer links to each other with described ultrasonic control device by signal wire.
2. the method that employing is installed according to claim 1 is characterized in that this method comprises the following steps:
1) pending former water is risen in the bio-reactor by intake pump, aspirates water outlet by membrane module through going out water pump, and by differential manometer record transmembrane pressure;
2) when transmembrane pressure reached in 10～100kPa scope, the ultrasonic wave control device awarded the ultrasonic generator feedback signal, and ultrasonic generator is started working and membrane module carried out ultrasonic cavitation clean; Described ultrasonic power is 100～1000W, and frequency is 20～60kHz, and each ultrasonic time is 0.5～30 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009684 CN1278954C (en) | 2004-10-19 | 2004-10-19 | Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410009684 CN1278954C (en) | 2004-10-19 | 2004-10-19 | Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor |
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| Publication Number | Publication Date |
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| CN1621359A CN1621359A (en) | 2005-06-01 |
| CN1278954C true CN1278954C (en) | 2006-10-11 |
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| CN 200410009684 Expired - Fee Related CN1278954C (en) | 2004-10-19 | 2004-10-19 | Method and apparatus for on-line ultrasonic cavitation cleaning of membrane bioreactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378335A (en) * | 2016-09-28 | 2017-02-08 | 山东金晶生物技术有限公司 | Washing device of flat plate type photobioreactor and washing method |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101781051B (en) * | 2010-03-16 | 2011-09-07 | 哈尔滨工业大学 | Aeration and low frequency ultrasonic wave reinforced film coagulation reaction separating device and method for producing drinking water thereby |
| CN102166478A (en) * | 2010-12-03 | 2011-08-31 | 北京林业大学 | Method and device for on-line ultrasonic controlling membrane pollution of fluidized bed membrane bio-reactor |
| CN102218268A (en) * | 2011-05-10 | 2011-10-19 | 北京林业大学 | Combination frequency ultrasonic online fluidized bed membrane bioreactor membrane pollution control device and method |
| JP6245413B1 (en) * | 2016-04-28 | 2017-12-13 | 東レ株式会社 | Wastewater treatment method by membrane separation activated sludge method |
| CN106045008A (en) * | 2016-06-20 | 2016-10-26 | 江苏金润环保工程有限公司 | Ultrasonic offline cleaning device for MBR (membrane bioreactor) membrane assembly |
| CN115321674A (en) * | 2022-07-15 | 2022-11-11 | 天津美天水环境科技有限公司 | Anaerobic MBR (membrane bioreactor) membrane pollution monitoring device and cleaning method |
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- 2004-10-19 CN CN 200410009684 patent/CN1278954C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378335A (en) * | 2016-09-28 | 2017-02-08 | 山东金晶生物技术有限公司 | Washing device of flat plate type photobioreactor and washing method |
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