CN102145962A - Ultrasonic coupled membrane bioreactor for treating difficultly-degradable organic waste water - Google Patents
Ultrasonic coupled membrane bioreactor for treating difficultly-degradable organic waste water Download PDFInfo
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- CN102145962A CN102145962A CN 201110045036 CN201110045036A CN102145962A CN 102145962 A CN102145962 A CN 102145962A CN 201110045036 CN201110045036 CN 201110045036 CN 201110045036 A CN201110045036 A CN 201110045036A CN 102145962 A CN102145962 A CN 102145962A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 8
- 239000010815 organic waste Substances 0.000 title abstract description 6
- 238000006731 degradation reaction Methods 0.000 claims abstract description 18
- 230000015556 catabolic process Effects 0.000 claims abstract description 17
- 239000010802 sludge Substances 0.000 claims abstract description 7
- 230000010358 mechanical oscillation Effects 0.000 claims abstract description 6
- 230000010355 oscillation Effects 0.000 claims abstract description 5
- 239000002351 wastewater Substances 0.000 claims description 14
- 238000002604 ultrasonography Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000004071 biological effect Effects 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
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- Activated Sludge Processes (AREA)
Abstract
The invention discloses an ultrasonic coupled membrane bioreactor for treating difficultly-degradable organic waste water, belonging to the technical field of sewage treatment. The bioreactor is characterized in that: the bottom of a membrane bioreactor is provided with an ultrasonic transducer; the ultrasonic transducer is connected with an ultrasonic generator and is used for converting a high-frequency oscillation signal transmitted by the ultrasonic generator into high-frequency mechanical oscillation and transmitting the high-frequency mechanical oscillation to the ultrasonic coupled membrane bioreactor; the frequency of ultrasonic waves is between 10 KHz and 35 KHz; the ultrasonic radiation intensity is between 0.05 W/cm<2> and 0.2 W/cm<2>; the radiation time is between 2 minutes and 20 minutes; the radiation period is between 12 hours and 48 hours; and the sludge concentration of the ultrasonic coupled membrane bioreactor is between 2 g/L and 10 g/L. By adopting the ultrasonic coupled membrane bioreactor, the biological activity and mass transfer capability are enhanced, the degradation efficiency of a difficultly-degradable organic matter is increased, the membrane pollution is reduced, online cleaning of a membrane component is realized, and the running cost of the membrane bioreactor is lowered.
Description
Technical field
The invention belongs to technical field of sewage, relate to a kind of ultrasonic coupled film bio-reactor of handling organic wastewater with difficult degradation thereby.
Background technology
Persistent organic pollutants comprise phenols, halogenated organic matters, Ppolynuclear aromatic, nitro-compound, some element compound (as organophosphorus, organic mercury etc.), thioether, sulfone class, some heterogeneous ring compound, contain two key triple bonds or uncle's quaternary carbon atom carbon skeleton compound etc. mainly from industries such as agricultural chemicals, petrochemical industry, printing and dyeing, pharmacy, plastic, rubbers.This type organic generally all has teratogenesis, mutagenesis, carcinogenesis, if add processing discharging meeting environment is not caused very big harm.
The environmental problem that hardly degraded organic substance caused is paid attention to by people day by day, at the processing aspect developing of hardly degraded organic substance many new technologies, comprise physico-chemical process and bioremediations such as biological reinforcing technology, immobilized cell technology such as wet oxidation process, burning method, compare with physico-chemical process, bioremediation treatment condition gentleness, the cost that reaches the same treatment effect is lower, and the secondary pollution of generation is less.But for organic wastewater with difficult degradation thereby, it is low that biological process also exists processing efficiency, the shortcoming that the residence time is long.
Membrane bioreactor is to study the most a kind of novel bio-reactor in the last few years, and its process object expands various trade effluents to gradually also by original city domestic sewage, has a extensive future.Especially to bio-refractory organic waste water, because richness has been amassed the slow microorganisms of rate of propagation such as a large amount of hardly degraded organic substance decomposers in the membrane bioreactor, make itself and organic duration of contact greater than hydraulic detention time, thereby improved the clearance of hardly degraded organic substance greatly; The macromole meta-bolites that produces in the macromolecular substance of many difficult degradations simultaneously or the degradation process also is trapped within the reactor, and the accumulation of these materials also helps the domestication to microorganism, thereby microorganism is further improved organic removal ability.Although membrane bioreactor is greatly improved and improves handling aspect the poisonous Persistent organic pollutants to compare than traditional bio-reactor, also be far from reaching the ideal state on performance.Inevitably there is membrane pollution problem in membrane bioreactor in operational process simultaneously, has improved the running cost and the management difficulty of reactor.
(sound intensity is less than 10W/cm for low frequency (20-50kHz) low strength
2) ultrasonic wave has certain biological effect, can increase the catalytic activity of permeability and selectivity, raising mass transfer and the enzyme of cytolemma, also can improve gene transformation and expression etc. simultaneously.In addition, ultrasonicly can effectively improve permeation flux, the development that controlling diaphragm pollutes; For membrane cleaning process, can effectively improve cleaning performance.Simultaneously, ultrasonic growth that can the Controlling System sludge concentration.Therefore, after ultrasonic and membrane bioreactor coupling, handle organic wastewater with difficult degradation thereby, can improve the biological degradation rate of waste water, decelerating membrane pollution.
Summary of the invention
The present invention is that the processing efficiency that exists in the organic wastewater with difficult degradation thereby biological treatment process is low in order to solve, long problem of the residence time, and then a kind of ultrasonic coupled film bio-reactor of handling organic wastewater with difficult degradation thereby is provided.
Ultrasonic coupled film bio-reactor of the present invention utilizes ultrasonic wave that the stimulation of microorganism is improved new title metabolism, raising microbic activity and the microorganism cells membrane permeability of accelerating cell, utilize the crown_interception of film simultaneously, improve some generation cycles long microorganism and the profit reduction and reserving time of hard-degraded substance in reactor, strengthen the biological degradation of hardly degraded organic substance.Because action of ultrasonic waves is eliminated sludge bulking, change the character of EPS simultaneously, can decelerating membrane pollution.
Technical solution of the present invention is as follows:
Ultrasonic coupled film bio-reactor is in the bottom of membrane bioreactor ultrasonic transducer to be set, this ultrasonic transducer also links to each other with ultrasonic generator, and the high-frequency oscillation signal that ultrasonic transducer sends ultrasonic generator converts the high frequency mechanical oscillation to and propagates into ultrasonic coupled film bio-reactor.Frequency of ultrasonic is 10-35KHz, and ultrasound wave irradiation intensity is 0.05-0.2W/cm
2, irradiation time is 2-20min, irradiation cycle is 12-48 hour; The sludge concentration of ultrasonic coupled film bio-reactor is 2-10g/L.
The invention has the beneficial effects as follows this ultrasonic coupled film bio-reactor, utilize the effect of irradiation of low-intensity ultrasonic, improve the permeability of biological activity, mass transfer ability and cytolemma on the one hand, improve degradation efficiency hardly degraded organic substance; Decelerating membrane pollution is realized the on-line cleaning to membrane module on the other hand, reduces the running cost of membrane bioreactor.
Description of drawings
Fig. 1 is the process flow sheet of processing high concentration hard-degraded organic waste water of the present invention.
Fig. 2 is in the processing of the present invention, the artwork of lower concentration organic wastewater with difficult degradation thereby.
Embodiment
Embodiment 1: handle the technical process of high concentration hard-degraded organic waste water.
As shown in Figure 1, at first enter anaerobic reactor for high concentration hard-degraded organic waste water, on the one hand, remove the part organic pollutant in the waste water, reduce the concentration of waste water, utilize the anaerobism effect on the other hand, the structure of partial destruction hardly degraded organic substance matter, improve its biodegradability, for further aerobic treatment creates conditions; Waste water enters ultrasonic coupled film bio-reactor then, in the membrane bioreactor bottom ultrasonic transducer is set, this transverter also links to each other with ultrasonic generator, the high-frequency oscillation signal that ultrasonic generator is sent, convert the high frequency mechanical oscillation to and propagate in the ultrasonic coupled film bio-reactor, frequency of ultrasonic is 10-35KHz, and ultrasound wave irradiation intensity is 0.05-0.2W/cm2, irradiation time is 2-20min, and irradiation cycle is 12-48 hour; The sludge concentration of coupled reactor is 2-10g/L.Under the combined reinforced effect of ultrasonic wave and ultra-filtration membrane, can improve 10-30% to the degradation rate of hardly degraded organic substance.Hyperacoustic irradiation can change the mud performance simultaneously, and decelerating membrane pollution is realized the on-line cleaning to membrane module, can make the backwash cycle stretch-out 10-30% of membrane module.Utilize the intermittently water outlet of time relay controlling diaphragm assembly simultaneously, further delay film and pollute.
Embodiment 2: in the processing, the technical process of lower concentration organic wastewater with difficult degradation thereby.
As shown in Figure 2, for in, the lower concentration organic wastewater with difficult degradation thereby directly enters ultrasonic coupled film bio-reactor, in the membrane bioreactor bottom ultrasonic transducer is set, this transverter also links to each other with ultrasonic generator, the high-frequency oscillation signal that ultrasonic generator is sent, convert the high frequency mechanical oscillation to and propagate in the ultrasonic coupled film bio-reactor, frequency of ultrasonic is 10-35KHz, ultrasound wave irradiation intensity is 0.05-0.2W/cm2, irradiation time is 2-20min, and irradiation cycle is 12-48 hour; The sludge concentration of coupled reactor is 2-10g/L.Under the combined reinforced effect of ultrasonic wave and ultra-filtration membrane, can improve 10-30% to the degradation rate of hardly degraded organic substance.Hyperacoustic irradiation can change the mud performance simultaneously, and decelerating membrane pollution is realized the on-line cleaning to membrane module, can make the backwash cycle stretch-out 10-30% of membrane module.Utilize the intermittently water outlet of time relay controlling diaphragm assembly simultaneously, further delay film and pollute.
Claims (1)
1. ultrasonic coupled film bio-reactor of handling organic wastewater with difficult degradation thereby, it is characterized in that: ultrasonic coupled film bio-reactor is in the membrane bioreactor bottom ultrasonic transducer to be set, this ultrasonic transducer also links to each other with ultrasonic generator, and the high-frequency oscillation signal that ultrasonic transducer sends ultrasonic generator converts the high frequency mechanical oscillation to and propagates into ultrasonic coupled film bio-reactor.Frequency of ultrasonic is 10-35KHz, and ultrasound wave irradiation intensity is 0.05-0.2W/cm
2, irradiation time is 2-20min, irradiation cycle is 12-48 hour; The sludge concentration of ultrasonic coupled film bio-reactor is 2-10g/L.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028232A (en) * | 2020-08-26 | 2020-12-04 | 江西理工大学 | Method for screening shortcut nitrifying bacteria by using low-intensity ultrasonic waves and application thereof |
| CN112624502A (en) * | 2020-12-15 | 2021-04-09 | 长春工程学院 | System and method for ultrasonic-assisted recovery of carbon, nitrogen and phosphorus resources in urban sewage |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376553A (en) * | 2008-09-27 | 2009-03-04 | 哈尔滨工业大学 | Method for processing low temperature sewerage using low-intensity ultrasonic strengthened membrane bioreactor |
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2011
- 2011-02-24 CN CN 201110045036 patent/CN102145962A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376553A (en) * | 2008-09-27 | 2009-03-04 | 哈尔滨工业大学 | Method for processing low temperature sewerage using low-intensity ultrasonic strengthened membrane bioreactor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028232A (en) * | 2020-08-26 | 2020-12-04 | 江西理工大学 | Method for screening shortcut nitrifying bacteria by using low-intensity ultrasonic waves and application thereof |
| CN112624502A (en) * | 2020-12-15 | 2021-04-09 | 长春工程学院 | System and method for ultrasonic-assisted recovery of carbon, nitrogen and phosphorus resources in urban sewage |
| CN112624502B (en) * | 2020-12-15 | 2021-11-05 | 长春工程学院 | System and method for ultrasonic-assisted recovery of carbon, nitrogen and phosphorus resources in urban sewage |
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Application publication date: 20110810 |