CN1054110C - Apparatus for treating activated sludge - Google Patents
Apparatus for treating activated sludge Download PDFInfo
- Publication number
- CN1054110C CN1054110C CN92101488A CN92101488A CN1054110C CN 1054110 C CN1054110 C CN 1054110C CN 92101488 A CN92101488 A CN 92101488A CN 92101488 A CN92101488 A CN 92101488A CN 1054110 C CN1054110 C CN 1054110C
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- CN
- China
- Prior art keywords
- filtration membrane
- membrane module
- housing parts
- treating pond
- water
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
-
- 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
- Y02W10/20—Sludge processing
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- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
The present invention relates to an activated sludge treating device for treating wastewater, such as ash water and sewage. Many filtration membrane modules which are parallel to each other are vertically arranged in a treating pond with a prearranged interval. The waste water to be treated which is stored in the treating pond is divided into solid and liquid by the filtration membrane modules, the water which passes through the filtration membrane modules serves as treated water, and the treated water is drew out. A stirring device is arranged under the filtration membrane modules.
Description
The present invention relates to handle waste water, as the activity sludge treatmenting equipment of buck or sewage.
In the known activity sludge treatmenting equipment of this class, all alternate in treating pond many filtration membrane modules are set vertically abreast, therefore be separated into solid and liquid during by film assembly when pending water, thereby make water sepn become treated water by film assembly.In the equipment of this known processing active sludge, on certain horizontal plane below the filtration membrane module, be provided with the diffusion ventpipe, can avoid precipitation or generation filter cake or gel layer on the outside surface of filtration membrane module.A plurality of gas orifices are arranged on this pipe.The gas lift interaction energy of air-flow produces the mixed stream vertically upward of gas-liquid phase in the diffusion ventpipe, so that the film surface of cleaning filtration membrane module.
Said structure has been arranged, just can the cleaning effect of this mixed stream on the filtration membrane module have been brought up to a certain degree, but can produce following problems like this by the airshed that increases the diffusion ventpipe.Increase the air-flow in the diffusion ventpipe, may the excessive aeration of pending relatively water generates, particularly to ammoniated pending water, the pH value in the water can be low excessively, bring adverse influence will for the processing operation of active sludge.
Another problem is to surpass a particular value when airshed, for example approximately is 1 (m
3/ m
3Min, wherein denominator m
3Represent the cross-sectional area of gas-liquid phase fluid passage), the gas lift effect of air-flow weakens owing to bubble condenses, and causes energy efficiency to reduce.Also have a problem to be because the distance between diffusion ventpipe and filtration membrane module lower end is so short, so that the unlikely uniform distribution of effusive air-flow from the diffusion ventpipe, this fact not only causes reducing air-flow gas lift effect, also may produce some dead spaces on filtration membrane module, this dead space does not reach the gas-liquid phase fluid.As a result, filtering layers such as filter cake will precipitate, and can thicken on filtration membrane module, thereby reduce the circulation on the filtration membrane module.
The present invention can overcome above-mentioned defective, therefore main purpose of the present invention provides a release activity sludge treatmenting equipment of divided thin film, it can eliminate any dead space that results from the filtration membrane module, can evenly clear up each surface of filtration membrane module, thereby prevent filtering layer such as filter cake effectively in film surface precipitation or thickening, and energy consumption is lower.
For achieving the above object, activity sludge treatmenting equipment provided by the invention comprises:
A treating pond that is used for storing pending water;
A plurality of isolated filtration membrane modules that are vertically mounted in the treating pond are separated into solid and liquid with it at pending water during by assembly, separate treated water,
It is characterized in that:
On a level attitude below the above-mentioned filtration membrane module, be provided with and can produce the upwards whipping appts of streaming fluid,
The 1st housing parts that holds described filtration membrane module,
Vertically disposed cylindric the 2nd housing parts is connected with the lower end of described the 1st housing parts, and its length is greater than 500m, less than 2000mm,
Above-mentioned filtration membrane module and whipping appts are arranged at and form filtering unit in the housing; And
A plurality of filtering units are set in above-mentioned treating pond.
Said structure has been arranged, and the mixed solution that the whole film surface of each filtration membrane module can both be stirred the device generation flows equably, cleaning effectively.Therefore, even being biochemical oxygen demand (BOD) concentration by pending water, the airshed in pipes such as air lance regulates, whole film surfaces of each filtration membrane module also can obtain evenly and effectively cleaning, and can not be subjected to the influence of specific gas flow rate and flow velocity.
Fig. 1 is the full sectional view of the present invention's the 1st embodiment activity sludge treatmenting equipment;
Fig. 2 is the frontview of the present invention's the 2nd embodiment activity sludge treatmenting equipment major parts;
Fig. 3 is the side-view of treatment facility among Fig. 2;
Fig. 4 is the full sectional view of the present invention's the 3rd embodiment activity sludge treatmenting equipment;
Fig. 5 is the orthographic plan of the present invention's the 4th embodiment activity sludge treatmenting equipment filtration membrane module structure;
Fig. 6 is the sectional view of a filtration membrane module among Fig. 5;
Fig. 7 is the sectional view of a major parts of the present invention the 5th embodiment;
Fig. 8 is the skeleton view of a major parts of the present invention's the 6th embodiment activity sludge treatmenting equipment;
Fig. 9 is the orthographic plan of the filtration membrane module of hanger bearing in Fig. 8 equipment;
Figure 10 is the sectional view along A-A line among Fig. 9;
Figure 11 is the sectional view along B-B line among Fig. 9;
Figure 12 is the synoptic diagram of the another kind of form of hanger bearing bar in the filtration membrane module of hanger bearing among Fig. 8;
Figure 13 is the another kind of form that filtration membrane module is provided with, and
Figure 14 is the sectional view along C-C line among Fig. 3.
Fig. 1 illustrates the 1st embodiment of the present invention.In treating pond 1, be provided with a plurality of filtering units 2.Each filtering unit 2 comprises the cylindrical shell 3 that a upper and lower ends is opened, a plurality of tabular filtration membrane modules 4 with the equal intervals positioned vertical in housing 3.This housing 3 is separated into two parts vertically, comprises the 1st housing parts 3a and the 2nd housing parts 3b.Filtration membrane module 4 is placed among the 1st housing parts 3a, and less housing parts 3c has cylindrical outer shape, and is positioned in the 2nd housing parts 3b.
Each filtration membrane module 4 is to be removably mounted among the 1st housing parts 3a, and it can upwards be pulled out.Therefore, filtration membrane module can be pulled out from the top singly, so that clean one by one or change.Also can be with the 1st housing parts, be that top shell component 3a is from the 2nd housing parts, be that bottom shell component 3b goes up separately, so that the 1st housing parts 3a is taken out from the processing tank that is provided with many filtration membrane modules 4, these filtration membrane modules 4 are provided in a side of on the 1st housing parts 3, so just can clean or change filtration membrane module one by one.Each filtration membrane module 4 is connected with suction pipe 6 by arm 6a in the upper end, and this pipe 6 is connected with suction pump 5 in certain appropriate location.Be used for the waste water supply-pipe 7 that waste water infeeds in the treating pond 1 is opened somewhere above treating pond 1.
The whipping appts 9 that has drive-motor 8 is installed in the less housing 3c that is arranged in filtration membrane module 4 belows.Vapor pipe 10 is installed in treating pond 1, and through to the treating pond bottom, and outside treating pond 1 certain is in the near caudal end part of vapor pipe 10 gas blower 11 is housed this pipe from the top one for the treatment of pond 1.
According to said structure, waste water, enter the treating pond 1 from waste water supply-pipe 7 as buck or sewage, mix mutually to handle with active sludge in the treating pond 1.Pending water is exposed to by passing through in the vapor pipe 10 vertical porous air perhaps that gas blower 11 is discharged, and is flooded by active sludge.
Pending water is sucked pump 5 suction by filtration membrane module 4 and suction pipe 6, and when it is separated into solid and liquid during by filtration membrane module 4, this part water by filtration membrane module 4 is separated into treated water.
By upwards flowing along film surface in the interval of mixed flow physical efficiency between film assembly 4 of whipping appts 9 generations.This mixed solution stream can clean the whole surface of each filtration membrane module 4 effectively.
Even during according to the exhaust magnitude of biochemical oxygen demand (BOD) the concentration adjustment vapor pipe 10 of pending water, whole film surfaces of each filtration membrane module 4 can both be given by the mixing effect of whipping appts 9 equably and clean effectively, and can not be subjected to the influence of rate of air flow and efflux velocity.
The bubble of discharging from vapor pipe 10 is subjected to the mixing effect of whipping appts 9 to be separated into tiny bubble.This can improve the oxygen in the bubble is dissolved into efficient in the pending water, therefore can improve the biochemical treatment effect.In addition, tiny bubble can produce further turbulence effect, suppresses the development of vibration.Like this, the water treatment in treating pond 1 finally can be finished satisfactorily, can keep the wearing quality of filtration membrane module 4 again for a long time.
Fig. 2 and Fig. 3 represent the 2nd embodiment of the present invention.As shown, there are a plurality of filtering units 2 to be placed in the treating pond 1.Vapor pipe 10 imports the 2nd housing 3b and opening therein.
According to this structure, although the distance between vapor pipe opening place horizontal plane and the 1st housing parts 3a lower end is smaller, but still can catch up with the mixed stream that is produced by the whipping appts 9 the 2nd housing parts 3b from the air-flow that vapor pipe 10 opening ends are discharged, make air can be fine foam (diameter is about 3-4mm) equably and extensively distribute.Cause fine foam between each filtration membrane module 4, to move up along film surface.As a result, produce upwards mobile gas-liquid two-phase mixed stream, so the whole film surface of each filtration membrane module 4 gets effective washing all.
In this embodiment, although each filtering unit 2 comprises a plurality of filtration membrane modules 4 that are arranged in the housing 3, and filtering unit 2 is placed in again in the treating pond 1, also can directly filtration membrane module be installed in the treating pond 1 and not use housing 3.The filter plate of outermost filtration membrane module 4 can be used as housing in this case.Should be noted that, although vapor pipe 10 is at the 2nd housing parts 3b split shed in this embodiment, also can be with the internal communication of vapor pipe 10 with less housing parts 3c.
Fig. 4 represents the 3rd embodiment, and is similar with the embodiment among Fig. 3, a plurality of filtering units 2, or housing 3 all is equipped with in the treating pond 1, and a plurality of filtration membrane modules 4 all are installed in each housing 3.If less housing parts 3c is not set, can make the 2nd housing parts 3b extend to the bottom for the treatment of pond 1, drive-motor 8 and whipping appts 9 can be installed in the 2nd housing parts 3b.The pending water of 12 expressions enters the ingress of housing 3.
In treating pond 1, in the housing that embodiment is shown in 3 as Fig. 2 vapor pipe 10 is housed, in addition, another vapor pipe 13 is housed outside housing 3 also.Gas blower of 14 expressions.Therefore, when 10 air feed of the vapor pipe in the housing 3 do not reach the required oxygen of biological treatment, can infeed by above-mentioned another vapor pipe 13 and reach the required that part of air of pending aquaticization oxygen-consumption (BOD) concentration.
Fig. 5 and Fig. 6 represent the 4th embodiment of the present invention, particularly in each filtering unit 2, and the special type of attachment of housing 3 and filtration membrane module 4.In these accompanying drawings, the part 21 that constitutes filtration membrane module 4 comprises the screen plate 22 that both sides are covered by filtration membrane 23.The inside of screen plate 22 remains treating water circulation road 24, and this passage is opened in screen plate 22 two ends.
For a plurality of filtration membrane modules 4 are in place integratedly, on the internal surface of the framework 25 of each rectangular case 3, be processed with guide path 26, in order to hold filtration membrane module 4, it is spaced apart predetermined interval, direction is the direction of filtration membrane module 4 arranged parallel, thereby each filtration membrane module 4 all is contained in the corresponding guide path 26.The length of predetermined space α must be greater than 6mm, and less than 10mm.
According to said structure, as the situation of above-mentioned embodiment, pending water upwards flows under the effect of vapor pipe jet lift and forms upwards fluid, is subjected to the mixing effect of whipping appts simultaneously, like this, current is advanced among the gap α between each filtration membrane module 4.Under the negative pressure of suction tube 6, each filtration membrane module 4 sucks pending water by its filtration membrane 23.
In this case, if in each filtration membrane module 4 that parallel interval is settled, the spacing α of adjacent filtration membrane 23 is less than 6mm, the runner that is limited by gap α becomes very little, then because thin-film member surface filter cake and the cake piece that comes off, be easy to produce the filter cake latch up phenomenon, cause runner to stop up therefrom.If gap α is greater than 10mm, because the shearing force effect that acts on the filter cake of make progress rate of flow of fluid and bubble incorporation generation can weaken.
Therefore, the width of determining gap α greater than 6mm less than 10mm, just can eliminate in the interior film runner that limits by gap α by the filter cake possibility of jamming, cake layer can be subjected to by the upwards rate of flow of fluid of runner between the adjacent films surface and the useful effect of bubble, thereby can reduce to clear up the required energy of film surface.
As mentioned above, a plurality of filtration membrane modules are fixed in the corresponding guide path 26 on the framework 25.Therefore, filtration membrane module 4 is fixed on the framework 25 integratedly.And for reaching the purpose of maintenance filtration membrane module 4, can only certain must be repaiied assembly from framework 25, to extract out, other assembly 4 maintains the original state.
According to said structure, the mixed stream that all surfaces of each film assembly 4 all can be stirred device cleans effectively equably.Therefore, though when from the magnitude of exhausted airs such as vapor pipe with respect to the biochemical oxygen demand (BOD) of pending water when adjusting, whole film surfaces of filtration membrane module also can evenly fully be cleaned, and irrelevant with the flow rate and the speed of air-flow.
Fig. 7 is the sectional view of the present invention's the 5th embodiment major portion.Be provided with a plurality of filtering units 2 in treating pond 1, each filtering unit 2 comprises the cylindrical shell 3 that open a top and bottom, and a plurality of tabular filtration membrane modules 4 are vertically mounted in the housing 3 with equidistant from distance.Housing 3 is by vertically forming to removable two-part structure, i.e. the 1st housing parts 3a and the 2nd housing parts 3b.Water shoot 41 is installed on the top or top shell component of the 1st housing parts 3a.Letter H represents the length of the 1st housing parts 3a.The length Z of the 2nd housing parts 3b is more longer than aforementioned the 1 2nd embodiment respective housings parts.Vapor pipe 10 is at the flared pedestal place of the 2nd housing parts 3b lower ending opening opening, and this enlarging opening is used for reducing liquid flowing resistance.
According to said structure, the relative sufficiently long of the length of the 2nd housing component 3b wherein, the air-flow of discharging from vapor pipe 10 top end openings will form the tiny bubble that diameter is 3-4mm, be evenly distributed on each cross section of the 2nd housing component 3b, and need not use whipping appts among the 1st, 2 embodiment.For all products that guarantee air distribute, length Z preferably reaches 500mm at least.
But not necessarily the longer the better for the length Z of the 2nd housing parts 3b.In the Processing Structure of the sewage isoreactivity mud of Fig. 7, required airshed is about 0.5-1.0 (m on the per unit cross section of the 2nd housing parts 3b
3/ m
3Min), it is very large that-this value is compared with general active sludge treatment situation, but it should be noted that continuous consequence, if promptly the length Z of the 2nd housing parts 3b is fixed too much, can causes bubble to condense, and can weaken the gas lift effect of bubble.Particularly, under the situation of the structure that adopts the 1st and the 2nd embodiment, even the length Z of the 2nd housing parts 3b is relatively very little, bubble also can distribute equably, and because the structure bubble of whipping appts can become littler, although do not have whipping appts in the structure of Fig. 7, if length Z is long, in the 2nd housing parts 3b, the cohesion meeting of bubble moves past in the journey on bubble and produces.If the diameter of bubble is greater than 10mm, just bubble no longer can pass through the gap between the two adjacent filtration membrane modules 4, so the gas lift effect of bubble also can weaken.This also can cause showy, because cake layer precipitates this showy meeting and causes flux to reduce.Therefore, the length Z of the 2nd housing parts 3b preferably is not more than 2m at the most.
The equipment energy consumption of handling the processed water yield of per unit (by the water yield of film) among aforementioned the 1st, 2,3 embodiment is 1.2KWh/m
3, but to the 5th embodiment among Fig. 7, energy requirement reduces to 0.45KWh/m
3, suitable design conditions is: H=1m, Z=1m, the internal diameter of the 1st and the 2nd housing are 0.3m.
Fig. 8-12 represents the 6th embodiment of the present invention.In Fig. 8, filtration membrane module 4 is respectively being same as Fig. 5, and the mode in 6 is fixed in the guide path 26 on the framework 25.On the position relative, two hooks 34 are arranged, be used for mentioning filtration membrane module 4 with each filtration membrane module 4 top.
The method of explained later cleaning and filtering film assembly 4 is arranged again.Filtration membrane module in being submerged in treating pond 1 contacts with pending water with the active sludge that is become by the water sepn of handling, after one period preset time, (3 to 4 months) form the cake layer of active sludge although whipping appts 9 produces upwards hydrodynamic effect at the film surface of each filtration membrane module 4.Therefore, for removing these cake layers, at first pending water is released from treating pond 1, up to seeing filtration membrane module 4, pending water all is being higher than filtration membrane module 4 upper end 20-50cm in the operation usually in the pond.After discharging water, the hook 34 of visible filtration membrane module 4 is tangled by rope 40, and is mentioned along guide path 26.Carry always 10-20mm and guide path 26 engagements are still arranged approximately to filtration membrane module 4 bottoms, this is mentioned action and stops, and the 40 supported hooks 38 that hang on the rod 37 of restricting hook.
In this structure, the top suspension strut of filtration membrane module 4 is hung on the rod 37 in support, is supported in the guide path 26 and descend; Therefore the fixed form suspension strut of filtration membrane module 4 swinging.Under this supporting condition, can carry out machinery or manually cleaning to filtration membrane more like a cork.Can not drench or damage in cleaning simultaneously yet.Have, therefore less moving filter film assembly during owing to cleaning just has not fragile diaphragm-operated advantage again.
For carrying out cleaning operation, the nozzle of ejection rinse water (not shown) can be installed in to support to hang on the rod 37 or near rod 37 and be provided with, and rinses out the active sludge cake layer to utilize high pressure cleaning water, and this is the first step of cleaning.
Although can clean by mentioning whole filtration membrane modules 4 simultaneously, aforementionedly hang rod 37 with the filtration membrane module 4 of 6-10mm fixed interval in guide path 26 by support and support, also can mention the 3-4 chip module, filtration membrane module 4 spaces of Zhi Chiing can be from 50 to 100mm so at every turn; Helping machinery greatly cleans.
The support of representing among Figure 11 is hung on excellent 37 inwalls that are fixed between operator's work, but another kind of removable type as shown in figure 12, and except that cleaning, it can not hinder the normal running for the treatment of pond 1.
Figure 13 and 14 is represented other example of filtration membrane module.In this embodiment, filtration membrane module 4 is the horizontal tubular profile, and its vertical and horizontal interval α can be 6-10mm.3d represents a cored slab.Between housing parts 3a and this cored slab 3d, form space 42, and suction tube 6 is communicated with this space 42.
Claims (6)
1. activity sludge treatmenting equipment comprises:
A treating pond that is used for storing pending water;
A plurality of isolated filtration membrane modules that are vertically mounted in the treating pond are separated into solid and liquid with it at pending water during by assembly, separate treated water,
It is characterized in that also comprising:
On a level attitude below the above-mentioned filtration membrane module, be provided with and can produce the upwards whipping appts of streaming fluid,
The 1st housing parts that holds described filtration membrane module,
Vertically disposed cylindric the 2nd housing parts is connected with the lower end of described the 1st housing parts, and its length is greater than 500mm, less than 2000mm,
Above-mentioned filtration membrane module and whipping appts are arranged at and form filtering unit in the housing; And
A plurality of filtering units are set in above-mentioned treating pond.
2. sludge treatment device according to claim 1 is characterized in that: also comprise the aerating apparatus that air is blasted second housing parts.
3. sludge treatment device according to claim 2 is characterized in that: described aerating apparatus is under the described filtration membrane module and on described whipping appts, link in the end portion of described second housing parts and the inside of described second housing parts.
4. sludge treatment device according to claim 2 is characterized in that: comprise that also another is blown into air in the described housing parts outside aerating apparatus in the treating pond.
5. activated-sludge processing apparatus according to claim 1, wherein each described filtration membrane module is tabular strainer, described treatment unit also comprises:
Frame unit that is used for installing filtration membrane module and
A plurality of guide paths of making on said frame are installed on the framework described tabular filtration membrane module, and press the parallel installation of predetermined space.
6. activity sludge treatmenting equipment according to claim 5, wherein said predetermined space is greater than 6mm less than 10mm.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63210185A JPH0259098A (en) | 1988-08-24 | 1988-08-24 | Activated sludge treatment apparatus |
| JP40334/91 | 1991-03-07 | ||
| JP219066/91 | 1991-08-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1065054A CN1065054A (en) | 1992-10-07 |
| CN1054110C true CN1054110C (en) | 2000-07-05 |
Family
ID=16585193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92101488A Expired - Lifetime CN1054110C (en) | 1988-08-24 | 1992-03-07 | Apparatus for treating activated sludge |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0259098A (en) |
| CN (1) | CN1054110C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372375B (en) * | 2007-08-21 | 2011-09-21 | 旭化成化学株式会社 | Waste water treatment method and waste water treatment device |
| CN107207300A (en) * | 2014-12-23 | 2017-09-26 | Bfg环境科技公司 | Mobile device for the biological treatment of biological respinse type waste water |
| US10427105B2 (en) | 2014-09-15 | 2019-10-01 | Nanostone Water Inc. | Filter device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW255835B (en) * | 1994-01-07 | 1995-09-01 | Kubota Kk | Filtration membrane module |
| EP1338328A4 (en) * | 2000-08-10 | 2006-09-20 | Gs Yuasa Corp | Immersion type membrane filter |
| AT408955B (en) * | 2000-09-28 | 2002-04-25 | Va Tech Wabag Gmbh | MEMBRANE FILTER SYSTEM AND METHOD FOR FILTERING |
| CN107106987A (en) * | 2014-09-15 | 2017-08-29 | 纳诺斯通水务公司 | Tower filtering module component and correlation technique |
| WO2018077870A1 (en) | 2016-10-25 | 2018-05-03 | Trinamix Gmbh | Nfrared optical detector with integrated filter |
| KR101902644B1 (en) * | 2016-11-30 | 2018-09-28 | 두산중공업 주식회사 | Membrane filtration system |
| CN111622037B (en) * | 2020-06-10 | 2021-07-20 | 广东金聪建设工程有限公司 | Ecological town road in sponge city |
-
1988
- 1988-08-24 JP JP63210185A patent/JPH0259098A/en active Pending
-
1992
- 1992-03-07 CN CN92101488A patent/CN1054110C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372375B (en) * | 2007-08-21 | 2011-09-21 | 旭化成化学株式会社 | Waste water treatment method and waste water treatment device |
| US10427105B2 (en) | 2014-09-15 | 2019-10-01 | Nanostone Water Inc. | Filter device |
| CN107207300A (en) * | 2014-12-23 | 2017-09-26 | Bfg环境科技公司 | Mobile device for the biological treatment of biological respinse type waste water |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065054A (en) | 1992-10-07 |
| JPH0259098A (en) | 1990-02-28 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120307 Granted publication date: 20000705 |