CN102963997B - Water treatment method and water treatment device - Google Patents
Water treatment method and water treatment device Download PDFInfo
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- CN102963997B CN102963997B CN201210320694.8A CN201210320694A CN102963997B CN 102963997 B CN102963997 B CN 102963997B CN 201210320694 A CN201210320694 A CN 201210320694A CN 102963997 B CN102963997 B CN 102963997B
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- active agent
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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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- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention provides a kind of can the water treatment device of membrane filtration efficiency of long term maintenance film module.This water treatment device comprises: foaming groove (1), and the waste water containing oil content flows into wherein; Foaming detector (21), it detects the gas release in foaming groove (1); Surfactivity agent feeding device, it is to foaming groove (1) supply schedule surface-active agent; Control device (30), with the addition of the mode control surface promoting agent making the addition of tensio-active agent increase when the gas release in groove (1) that foams is no more than prescribed value, make when this gas release exceedes prescribed value the addition of tensio-active agent reduce; With film module (5), it is configured in the downstream of foaming groove (1).
Description
Technical field
The present invention relates to water treatment method and the water treatment device of the waste water containing oil content.
Background technology
As an example of water treatment method, there is following membrane separation activated sludge process (MembraneBioReactor, membrane bioreactor), waste water is imported to active sludge treatment groove and carries out active sludge treatment to remove organism etc. by it, then make it pass through to comprise the film module of the filtering membranes such as reverse osmosis (RO) film, ultrafiltration (UF) film, micro-filtration (MF) film, tubular fibre (HF) film, plankton, other suspended solid (referred to as SS), foreign matter impurity are carried out to membrane filtration process and carries out solid-liquid separation.
Membrane separation activated sludge process uses film module to carry out solid-liquid separation, therefore have can omit final precipitation position, can the advantage of miniaturization of the apparatus.
But when carrying out membrane filtration process to the waste water containing oil content, oil content is attached on film and produces blocking, the cleaning frequency of film module becomes large, there is the problem that water treatment efficiency declines.
Patent Document 1 discloses following content, in oily(waste)water, add flocculation agent, make the oil content in waste water and organism coagulative precipitation to reduce oil content, thus suppress the blocking of film.
Prior art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2-268893 publication
Patent documentation 2: Japanese Patent Publication 6-59478 publication
Summary of the invention
The problem that invention will solve
But the method disclosed in patent documentation 1 can produce a large amount of mud, therefore there is the problem that sludge treatment cost uprises.In addition, even if adopt the method, according to the difference of the characteristic of waste water, also the waste water still fully not reducing oil content may be supplied to film module, fully can not suppress the blocking of film.
So, the object of the present invention is to provide a kind of can the water treatment method of membrane filtration efficiency of long term maintenance film module and water treatment device.
For the method for dealing with problems
In order to reach above-mentioned purpose, waste water containing oil content is imported to foaming groove by water treatment method of the present invention, in above-mentioned foaming groove, above-mentioned waste water is added and mixed surfactant, above-mentioned waste water is made to carry out membrane filtration process by film module, the feature of this water treatment method is: detect the gas release in above-mentioned foaming groove, in the mode making the addition of above-mentioned tensio-active agent increase, make when this gas release exceedes prescribed value the addition of above-mentioned tensio-active agent reduce when this gas release is no more than prescribed value, control the addition of above-mentioned tensio-active agent.
According to water treatment method of the present invention, the waste water containing oil content is imported to foaming groove, in foaming groove, the waste water containing oil content is mixed with tensio-active agent.Now, based on the addition of the gas release control surface promoting agent in foaming groove, therefore, it is possible to supply oil content micellization (micelle) the necessary tensio-active agent in order to make in waste water roughly neither too much nor too littlely.Therefore, it is possible to by the oil content that is contained in waste water micellization emulsion dispersion roughly completely, oil content can be prevented to be attached to film.In addition, the addition optimizing of tensio-active agent can be made, therefore, it is possible to reduce reagent cost.
Water treatment method of the present invention preferably in above-mentioned membrane filtration process continuity ground or intermittently to the face jeting surface promoting agent of above-mentioned film module.According to which, be attached to film module oil content that is neighbouring or film module and form micella, therefore, it is possible to effectively prevent the blocking of film by reacting with the tensio-active agent sprayed to face.And due to tensio-active agent, the organism sex change (modification) such as protein are expanded, therefore, it is possible to prevent the solid matter etc. beyond oil content to be attached to film.
Water treatment method of the present invention detects the gas release in above-mentioned foaming groove preferably by the method being selected from optical means, electrical method and image method.
Water treatment method of the present invention preferably uses Biodegradable tensio-active agent as above-mentioned tensio-active agent.According to which, the impact that surrounding environment is caused can be reduced.
Water treatment method of the present invention preferably by being imported to after active sludge treatment groove carries out active sludge treatment by the waste water after above-mentioned foaming groove, carries out membrane filtration process by above-mentioned film module.According to which, the oil content after active sludge treatment groove process organism, micellization can be utilized, more clean process water can be obtained.
In addition, the feature of water treatment device of the present invention is, comprising: foaming groove, and the waste water containing oil content flows into wherein; Foaming detector, it detects the gas release in above-mentioned foaming groove; Surfactivity agent feeding device, it is to above-mentioned foaming groove supply schedule surface-active agent; Control device, the mode make the addition of above-mentioned tensio-active agent increase when it is no more than prescribed value with the gas release in above-mentioned foaming groove, when above-mentioned gas release exceedes prescribed value, the addition of above-mentioned tensio-active agent being reduced controls the feed rate of above-mentioned tensio-active agent; And film module, it is configured in the downstream of above-mentioned foaming groove.
According to water treatment device of the present invention, waste water containing oil content is imported to foaming groove, in foaming groove, mixing contains waste water and the tensio-active agent of oil content, based on the addition of the gas release control surface promoting agent in foaming groove, therefore, it is possible to supply the necessary tensio-active agent of oil content micellization in order to make in waste water roughly neither too much nor too littlely.Therefore, it is possible to by the oil content that is contained in waste water micellization emulsion dispersion roughly completely, the oil content when film module carries out membrane filtration process can be prevented thus to be attached to film and to block.In addition, the addition optimizing of tensio-active agent can be made, therefore, it is possible to reduce reagent cost.
Water treatment device of the present invention preferably also has the tensio-active agent jet apparatus of the face jeting surface promoting agent to above-mentioned film module.According to which, be attached near film or the oil content that is attached to film forms micella, therefore, it is possible to effectively prevent the blocking of film by reacting with the tensio-active agent ejected from tensio-active agent jet apparatus.And due to tensio-active agent, the organism sex change such as protein are expanded, therefore, it is possible to prevent the solid matter etc. beyond oil content to be attached to film.
Water treatment device of the present invention preferably also comprises the oil film sensor of the upstream being configured in above-mentioned foaming groove.And, preferably also comprise and make not detect that the waste water of oil film walks around the bypass line of above-mentioned foaming groove and flow further downstream by above-mentioned oil film sensor.According to which, can prevent from adding tensio-active agent, therefore, it is possible to make the usage quantity of tensio-active agent lower to the waste water not containing oil content.
The preferred above-mentioned foaming detector of water treatment device of the present invention detects gas release by the method being selected from optical means, electrical method and image method.
The preferred above-mentioned tensio-active agent of water treatment device of the present invention is Biodegradable tensio-active agent.According to which, the impact that surrounding environment is caused can be reduced.
Water treatment device of the present invention preferably includes active sludge treatment groove, in the downstream of this active sludge treatment groove or this active sludge treatment groove, be configured with above-mentioned membrane filtration treatment unit.According to which, the oil content after active sludge treatment groove process organism, micellization can be utilized, more clean process water can be obtained.
Invention effect
According to the present invention, based on the addition of the gas release control surface promoting agent in foaming groove, therefore, it is possible to supply the necessary tensio-active agent of oil content micellization in order to make in waste water roughly neither too much nor too littlely.Therefore, it is possible to the oil content micellization roughly completely that will be contained in waste water, oil content can be prevented to be attached to film.In addition, the addition optimizing of tensio-active agent can be made, therefore, it is possible to reduce reagent cost.
Accompanying drawing explanation
Fig. 1 is the Sketch figure of the first embodiment of water treatment device of the present invention.
Fig. 2 is the control flow chart of the control device of this water treatment device.
Fig. 3 is the Sketch figure of the second embodiment of water treatment device of the present invention.
Fig. 4 is the Sketch figure of the 3rd embodiment of water treatment device of the present invention.
Fig. 5 is the control flow chart of the control device of this water treatment device.
The explanation of Reference numeral
1: foaming groove
2: whipping appts
3: tensio-active agent storage tanks
4: active sludge treatment groove
5: film module
21: foaming detector
22: oil film sensor
30,31: control device
L1 ~ L7: pipe arrangement
P1 ~ P3: pump
Embodiment
Use Fig. 1 that the first embodiment of water treatment device of the present invention is described.
The pipe arrangement L1 extended from waste water source is connected with foaming groove 1.
Foaming detector 21 and whipping appts 2 is configured with in foaming groove 1.Be not particularly limited as foaming detector 21.As long as be configured to can be detected gas release by the method being selected from optical means, electrical method and image method just can use.As the device optically detecting gas release, light (laser) level transducer, gamma-rays level transducer etc. can be enumerated.As the device being detected gas release by electrical method, the device etc. that foam level detection meter, specific inductivity formula level switch etc. detect potential variation when contacting with bubble can be enumerated.As the device being detected gas release by image method, the image automatic identification equipments etc. such as pick up camera can be enumerated.The measurement result of foaming detector 21 is transfused to control device 30.
In addition, be connected with on the top of foaming groove 1 the pipe arrangement L2 stretched out from tensio-active agent storage tanks 3.Insert at pipe arrangement L2 and pump P1 is installed.Pump P1 is by control device 30 drived control.In this embodiment, tensio-active agent storage tanks 3, pipe arrangement L2 and pump P1 are equivalent to " surfactivity agent feeding device " of the present invention.
Active sludge treatment groove 4 is configured with in the downstream of foaming groove 1.Foaming groove 1 is connected via pipe arrangement L3 with active sludge treatment groove 4.
Have containing microbic activity mud as long as active sludge treatment groove 4 is detained in groove, the treatment trough that can carry out active sludge treatment by the action breaks organism of microorganism is just not particularly limited.Such as, the aerator tank (aeration tank) containing the aerobic bacteria such as ammonia oxidizing bacteria, nitrite-oxidizing bacterium, the intermittent aeration groove etc. containing anerobes such as aerobic bacteria and denitrifier such as nitrite-oxidizing bacterium can be used.The pipe arrangement L4 for extracting mud out is extended with from the bottom of active sludge treatment groove.
In this embodiment, film module 5 is positioned at active sludge treatment groove 4, is configured to be immersed in the treatment solution in groove.
Be extended with the pipe arrangement L5 inserting and be provided with pump P2 from the secondary side (side that the process water after filtration flows through) of film module 5, by the action of pump P2, the process water in groove carries out membrane filtration process by film module 5.
As the filtering membrane being used in film module 5, as long as general filtering membrane just all can use.Such as, reverse osmosis (RO) film, ultrafiltration (UF) film, micro-filtration (MF) film, tubular fibre (HF) film etc. can be enumerated.In addition, as the material of filtering membrane, polyacrylonitrile, polyimide, polyethersulfone, PPSS (Polyphenylene sulfide sulfone), tetrafluoroethylene (Polytetrafluoroethylene), poly(vinylidene fluoride) (Polyvinylidenefluoride), polypropylene, polyethylene etc. can be enumerated.In addition, the form as film module 5 is not particularly limited, and can enumerate hollow fiber membrane module, flat membranous type module, spiral type module, cast module etc.
Be configured with aeration (foaming) device 6 in the below of film module 5, carry out aeration in per specified time, to prevent the blocking of film module 5.
In addition, film module 5 is configured in active sludge treatment groove 4 in this embodiment, but also can be configured in outside the groove of active sludge treatment groove 4.
Then, use the water treatment device shown in Fig. 1 that the first embodiment of water treatment method of the present invention is described.In addition, as long as the waste water of the handling object of water treatment method of the present invention containing the waste water of oil content, be not particularly limited.Such as can enumerate the plant effluent etc. that chemically factory or food factories are discharged.
First, waste water is supplied to foaming groove 1, whipping appts 2 action is stirred the waste water be supplied in groove.And make pump P1 action, the tensio-active agent of supply specified amount, makes the oil content micellization in waste water.
Be not particularly limited as tensio-active agent.Such as sodium soap can be enumerated, alkyl sulfuric ester sodium, α-sodium olefin sulfonate, Sodium Lauryl Sulphate BP/USP, laureth sodium sulfovinate, sodium cocoyl glutamate, sodium cocoyl methyl Sodium L-alaninate, the anion surfactants such as lauryl alcohol sulfosuccinic ester disodium, stearyl trimethyl ammonium chloride, the cats products such as palmityl trimethyl ammonium chloride, coco betaine, LAA, cocounut oil acyl both sexes guanidine-acetic acid sodium, lauryl hydroxyl sulfo betaine, lauroylamidopropyl betaine, the amphotericses etc. such as AMONYL 380LC.Wherein, because can not accumulate to nature, can make environmental loads little, therefore the Biodegradable tensio-active agent such as sodium soap, alkyl sulfuric ester sodium, α-sodium olefin sulfonate is preferably used.
Add in foaming groove 1 and mixed surfactant and the waste water that foams carries out active sludge treatment to active sludge treatment groove 4 supply.Then, the process water after active sludge treatment is carried out membrane filtration process by film module 5, filtered water is delivered to water exhaust system, add chlorine etc. and discharge outside system.In addition, the mud accumulating on the bottom of active sludge treatment groove 4 is regularly drawn out of from pipe arrangement L3, delivers to not shown sludge treating system, carries out drying treatment, processed.
Carry out water treatment like this, in the present invention, carried out the feed rate of adjustment sheet surface-active agent by the action of control device 30 control pump P1 in the manner as described below.
Below, use the schema of Fig. 2 that the control of control device 30 is described.
In step S1, judge whether the gas release detected by foaming detector 21 is more than threshold value.
When the gas release detected by foaming detector 21 is less than lower threshold, in order to make the necessary tensio-active agent of the complete micellization of the oil content in waste water not enough, therefore in step s 2, export the instruction that the addition of tensio-active agent is increased to pump P1, get back to step S1.
On the other hand, when the gas release detected by foaming detector 21 is more than lower threshold, then more than upper limit threshold is determined whether in step S3.
If less than upper limit threshold, then can judge for make the necessary tensio-active agent of the complete micellization of the oil content in waste water roughly neither too much nor too little be supplied to, therefore finishing control.
On the other hand, time more than for upper limit threshold, in order to make the necessary tensio-active agent of the complete micellization of the oil content in waste water be supplied too much, therefore in step S4, the instruction that the addition of tensio-active agent is reduced is exported to pump P1, finishing control.
According to the present invention, based on the addition of the gas release control surface promoting agent in foaming groove 1, therefore, it is possible to supply the necessary tensio-active agent of oil content micellization in order to make in waste water roughly neither too much nor too littlely.Therefore, it is possible to make the oil content micellization roughly being completely contained in waste water, oil content can be prevented to be attached to the film of film module 5.And then oil content micellization and emulsion dispersion are in waste water, and in active sludge treatment groove 4, oil content is easy to be carried out active sludge treatment thus, and oil content can be made more to be difficult to be attached to the film of film module 5.Therefore, it is possible to suppress cleaning frequency, the replacement frequency of film module 5.In addition, the addition optimizing of tensio-active agent can be made, therefore, it is possible to reduce reagent cost.
Use Fig. 3 that the second embodiment of water treatment device of the present invention is described.In addition, mark same-sign to the part identical in fact with the first embodiment, the description thereof will be omitted.
The water treatment device of this embodiment, is configured with the jet orifice 7 of primary side (being supplied to the side being filtered water) the jeting surface promoting agent of the film to film module 5 in active sludge treatment groove 4.The pipe arrangement L6 that jet orifice 7 is provided with pump P3 with the insertion extended from tensio-active agent storage tanks 3 is connected.Pump P3 is with synchronous with pump P2 or carried out time controling in the mode of the timing intermitten specified during pump P2 action.That is, with in the membrane filtration process of film module 5 continuously or the mode of action off and on controlled.
In addition, in this embodiment, jet orifice 7, tensio-active agent storage tanks 3, pipe arrangement L6 and pump P3 are equivalent to " tensio-active agent jet apparatus " of the present invention.
According to this water treatment device, during utilizing film module 5 pairs of waste water to carry out membrane filtration process, from jet orifice 7 to the primary side jeting surface promoting agent of the film of film module 5, therefore near the film being attached to film module 5 or be attached to the oil content of film module 5, react with the tensio-active agent sprayed to face, form micella thus, therefore, it is possible to effectively prevent the blocking of film.And then due to tensio-active agent, the organics modifications such as protein expand, therefore, it is possible to prevent the solid matter beyond oil content from adhering to film.
Use Fig. 4 that the 3rd embodiment of water treatment device of the present invention is described.In addition, mark same-sign to the part identical in fact with first, second embodiment, the description thereof will be omitted.
This water treatment device is configured with at the pipe arrangement L1a extended from waste water source the oil film sensor 22 and switching valve V1 that detect the oil film of the waste water flow through in pipe arrangement L1a.The pipe arrangement L1b be connected with foaming the groove 1 and pipe arrangement L7 be connected with activated sludge tank 4 extends from switching valve V1.Be not particularly limited as oil film sensor 22, equipment commonly known in the art can be used.Such as can enumerate the Oil spill detection sensors such as laser scan type, polarisation analysis mode or UV light irradiation type.The measurement result of oil film sensor 22 is transfused to control device 31.
Below use the control in the schema explanation control device 31 of Fig. 5.
Judge whether in step s 11 to detect oil film by oil film sensor 22.
When not detecting oil film, in step s 12, utilize switching valve V1 to disconnect the connection of pipe arrangement L1a and pipe arrangement L1b, pipe arrangement L1a is connected with pipe arrangement L7, stop the action of pump P3 completely, finishing control.
On the other hand, when detecting oil film, in step s 13, utilize switching valve V1 to disconnect the connection of pipe arrangement L1a and pipe arrangement L7, pipe arrangement L1a is connected with pipe arrangement L1b.In addition, pump P3 is made to start to work.In addition, pump P3 is with synchronous with pump P2 or carried out time controling in the mode of the timing intermitten specified during pump P2 action.
Then, in step S 14, judge that whether the gas release detected by foaming detector 21 is as more than threshold value.
When the gas release detected by foaming detector 21 is less than lower threshold, in order to make the necessary tensio-active agent of the complete micellization of the oil content in waste water not enough, therefore, in step S15, export the instruction that the addition of tensio-active agent is increased to P1, get back to step S14.
On the other hand, when the gas release detected by foaming detector 21 is more than lower threshold, then more than upper limit threshold is determined whether in step S16.
If less than upper limit threshold, then can judge for make the necessary tensio-active agent of the complete micellization of the oil content in waste water roughly neither too much nor too little be supplied to, finishing control.
On the other hand, time more than for upper limit threshold, in order to make the necessary tensio-active agent of the complete micellization of the oil content in waste water be supplied too much, therefore in step S17, the instruction that the addition of tensio-active agent is reduced is exported to pump P1, finishing control.
According to the water treatment device of this embodiment, the waste water not containing oil content can be walked around foaming trough and directly be supplied to active sludge treatment groove 4, therefore, it is possible to make the further optimizing of the usage quantity of tensio-active agent, can carry out water treatment efficiently.
Claims (12)
1. a water treatment method, is characterized in that:
Waste water containing oil content is imported foaming groove, in described foaming groove, tensio-active agent is added to described waste water, utilize whipping appts to be mixed with described tensio-active agent by described oil content, make described waste water carry out membrane filtration process by film module,
Detect the gas release in described foaming groove, with when this gas release is less than lower threshold, the necessary tensio-active agent of the complete micellization of oil content in described waste water is not enough, therefore the addition of described tensio-active agent is made to increase, when this gas release is more than upper limit threshold, the necessary tensio-active agent of the complete micellization of the oil content in described waste water is supplied too much, therefore makes the mode that the addition of described tensio-active agent reduces, control the addition of described tensio-active agent
There is the described whipping appts for making described tensio-active agent and described oil content micellization.
2. water treatment method as claimed in claim 1, is characterized in that:
In described membrane filtration process, continuity ground or intermittently to the face jeting surface promoting agent of described film module.
3. water treatment method as claimed in claim 1 or 2, is characterized in that:
The gas release in described foaming groove is detected by the method being selected from optical means, electrical method and image method.
4. water treatment method as claimed in claim 1 or 2, is characterized in that:
Use Biodegradable tensio-active agent as described tensio-active agent.
5. water treatment method as claimed in claim 1 or 2, is characterized in that:
By being imported to after active sludge treatment groove carries out active sludge treatment by the waste water after described foaming groove, carry out membrane filtration process by described film module.
6. a water treatment device, is characterized in that, comprising:
Foaming groove, the waste water containing oil content flows into wherein;
Foaming detector, it detects the gas release in described foaming groove;
Surfactivity agent feeding device, it is to described foaming groove supply schedule surface-active agent;
Whipping appts, described oil content mixes with described tensio-active agent by it;
Control device, its with the gas release in described foaming groove less than lower threshold time, the necessary tensio-active agent of the complete micellization of oil content in described waste water is not enough, therefore the addition of described tensio-active agent is made to increase, when described gas release is more than upper limit threshold, the necessary tensio-active agent of the complete micellization of oil content in described waste water is supplied too much, and the mode therefore making the addition of described tensio-active agent reduce, controls the feed rate of described tensio-active agent; With
Film module, it is configured in the downstream of described foaming groove,
Described tensio-active agent is for making the oil content micellization in waste water.
7. water treatment device as claimed in claim 6, is characterized in that:
Also there is the tensio-active agent jet apparatus of the face jeting surface promoting agent to described film module.
8. water treatment device as claimed in claims 6 or 7, is characterized in that:
Also comprise the oil film sensor of the upstream being configured in described foaming groove.
9. water treatment device as claimed in claim 8, is characterized in that:
Also comprise and make not detect that the waste water of oil film walks around the bypass line of described foaming groove and flow further downstream by described oil film sensor.
10. water treatment device as claimed in claims 6 or 7, is characterized in that:
Described foaming detector detects gas release by the method being selected from optical means, electrical method and image method.
11. water treatment device as claimed in claims 6 or 7, is characterized in that:
Described tensio-active agent is Biodegradable tensio-active agent.
12. water treatment device as claimed in claims 6 or 7, is characterized in that:
Also comprise active sludge treatment groove, in the downstream of this active sludge treatment groove or this active sludge treatment groove, be configured with described film module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011190788A JP5796420B2 (en) | 2011-09-01 | 2011-09-01 | Water treatment method and water treatment apparatus |
| JP2011-190788 | 2011-09-01 |
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| Publication Number | Publication Date |
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| CN102963997A CN102963997A (en) | 2013-03-13 |
| CN102963997B true CN102963997B (en) | 2015-10-14 |
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| CN201210320694.8A Expired - Fee Related CN102963997B (en) | 2011-09-01 | 2012-08-31 | Water treatment method and water treatment device |
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| JP (1) | JP5796420B2 (en) |
| CN (1) | CN102963997B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5782931B2 (en) * | 2011-09-05 | 2015-09-24 | 富士電機株式会社 | Water treatment method and water treatment apparatus |
| JP2014188453A (en) * | 2013-03-27 | 2014-10-06 | Sumitomo Heavy Ind Ltd | Water treatment system and water treatment method |
| CN107162105A (en) * | 2017-06-01 | 2017-09-15 | 苏州市玄天环保科技有限公司 | A kind of sewage pre-treatment device of water-oil separating |
| CN113840641B (en) * | 2019-05-16 | 2023-03-14 | 日曹工程股份有限公司 | Continuous phase separation system and device based on membrane and suitable for small flow |
| CN112694171B (en) * | 2020-12-22 | 2022-08-05 | 上海上实龙创智能科技股份有限公司 | Aeration control method and device for sewage treatment, electronic equipment and storage medium |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2013052327A (en) | 2013-03-21 |
| JP5796420B2 (en) | 2015-10-21 |
| CN102963997A (en) | 2013-03-13 |
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