CN201458903U - Integrated domestic sewage treatment device - Google Patents
Integrated domestic sewage treatment device Download PDFInfo
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- CN201458903U CN201458903U CN200920109191XU CN200920109191U CN201458903U CN 201458903 U CN201458903 U CN 201458903U CN 200920109191X U CN200920109191X U CN 200920109191XU CN 200920109191 U CN200920109191 U CN 200920109191U CN 201458903 U CN201458903 U CN 201458903U
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- sludge
- domestic sewage
- treatment device
- sewage treatment
- reaction zone
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- 239000010865 sewage Substances 0.000 title claims abstract description 63
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 239000010802 sludge Substances 0.000 claims abstract description 71
- 238000010992 reflux Methods 0.000 claims abstract description 26
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 23
- 230000008569 process Effects 0.000 claims description 21
- 238000005276 aerator Methods 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 7
- 238000009293 extended aeration Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000005273 aeration Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- 238000005516 engineering process Methods 0.000 description 11
- 238000012545 processing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000009711 regulatory function Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000003403 water pollutant Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Classifications
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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
Landscapes
- Activated Sludge Processes (AREA)
Abstract
The utility model relates to an integrated domestic sewage treatment device suitable for the integrated treatment of rural (villages and towns) domestic sewage, far from municipal drainage pipelines. The integrated domestic sewage treatment device is characterized by comprising a biochemical reaction tank which is separated into a main reaction region and a pre-reaction region by a separator; the main reaction region and the pre-reaction region are communicated by the bottom connection hole of the separator; the pre-reaction region is communicated with a biological selection region which is connected with a hoisting shaft by a pipeline and a hoisting pump; grids are arranged between the hoisting shaft and the domestic sewage inlet; the main reaction region is internally provided with a shooting flow aeration machine, a sludge reflux pump and a decanter which is connected with an exhaust pipe; and the sludge outlet of the sludge reflux pump is respectively connected with a sludge tank, the biological selection region and the pre-reaction region.
Description
Technical field
The utility model relates to sewage treatment area, and particularly a kind of integrated domestic sewage treatment device is suitable for close-coupled processing away from rural area (small towns) sanitary sewage of municipal drainage pipeline.
Background technology
Along with rural area (small towns) sanitary sewage quantity discharged increases, the pollution of area source aggravation, lack suitable improvement technology, water processing establishment construction hysteresis etc., rural area (small towns) environmental pollution improvement difficulty is more outstanding than the city, becomes the major obstacle of China's new countryside construction in addition.For make vast farmers step into well-to-do level comprehensively, party and state attaches great importance to the environment protection and the construction of new socialist countryside.The sanitary sewage discharging in rural area (small towns) must have a rational treatment process, thereby reaches the harmony of man and nature, the purpose of preserving the ecological environment.
Because zone, rural area (small towns) is wide, peasant household is sparsely populated, and the collection and treatment difficulty is bigger.At present, there is following problem in the processing of rural area (small towns) sanitary sewage: the one, and the construction fund famine.The domestic sewage in rural areas by using treatment facility belongs to the public welfare project, needs a large amount of public finance fund inputs, because various places finance is relatively more difficult, adds most of village collective economy weakness, the fund input wretched insufficiency, and the pollution treatment project is difficult to carry out; The 2nd, to be familiar with not in placely, countryside sewage treating does not cause enough attention of people as yet; The 3rd, lack the sewage disposal technology in suitable rural area (small towns) generally, need that the research and development construction cost is low, treatment effect good, no expense of operation or low expense, be fit to the treatment technology that decentralized is disposed.
The utility model content
The utility model provides a kind of integrated domestic sewage treatment device at the deficiencies in the prior art, is suitable for close-coupled processing away from rural area (small towns) sanitary sewage of municipal drainage pipeline.Described integrated domestic sewage treatment device, the capital construction cost is low, technical process is simple, occupation of land economizes, operational and administrative expenses is low, operation scheme is flexible, and the effluent quality height can satisfy the I level B standard in the Water Pollutants Discharge Standards (DB11/307-2005) of Beijing in 2005 promulgation after testing.
The technical solution of the utility model is as follows:
Integrated domestic sewage treatment device, it is characterized in that, comprise biochemical reaction tank, described biochemical reaction tank is divided into main reaction region and pre-reaction zone by dividing plate, described main reaction region is communicated with the bottom Link Port of pre-reaction zone by described dividing plate, described pre-reaction zone is communicated with biological selecting area, and described biological selecting area is connected winding shaft by pipeline with lift pump, is provided with grid between described winding shaft and the sanitary sewage import; Be provided with jet aerator, sludge reflux pump in the described main reaction region and strain hydrophone; The described hydrophone of straining links to each other with rising pipe, and the sludge outlet of described sludge reflux pump connects sludge sump, biological selecting area and pre-reaction zone respectively.
The sludge outlet of described sludge reflux pump is connected sludge sump by pipeline with the excess sludge discharge valve.
The sludge outlet of described sludge reflux pump is connected biological selecting area by pipeline with return valve.
The sludge outlet of described sludge reflux pump is connected pre-reaction zone by pipeline with return valve.
The top of described biological selecting area is provided with the overflow port that is communicated with pre-reaction zone.
Described biological selecting area is arranged in the pre-reaction zone.
Described lift pump is arranged in the winding shaft.
Described rising pipe is connected with outlet valve respectively, and connects winding shaft by the effluent recycling valve.
Described biochemical reaction tank is an intermittent cycle extended aeration activated sludge process biochemical reaction tank.
Technique effect of the present utility model is as follows:
Integrated domestic sewage treatment device of the present utility model, main body adopts biochemical reaction tank, front end at biochemical reaction tank is provided with grid and winding shaft in addition, also promptly before biological treatment stage, increased the front-end processing process: grid at first is set at the sewage inlet place, be used for tackling suspended substance and the floating matter of removing the sewage greater particle size, simultaneously lift pump in the winding shaft and the aerator in the reaction tank mentioned provide protection; Flow into winding shaft through the sewage after the grid processing, this winding shaft is designed to have certain volume, it effect not only be used to install lift pump, also has sewage water yield regulatory function simultaneously, the sewage flooding quantity that enters biochemical reaction tank after process is promoted is adjustable, helps follow-up biological treatment stage and reaches better effect.
The utility model biological treatment stage adopts the ICEAS biochemical reaction tank, and the ICEAS full name is intermittent cycle extended aeration activated sludge process (Intermittent Cycle Extended Aeration System).ICEAS biochemical reaction tank of the present utility model removes the main reaction region and the pre-reaction zone that comprise prior art, and biological selecting area also is set in pre-reaction zone, can suppress hyphomycetic growth and breeding effectively, overcomes sludge bulking.The sewage of winding shaft at first enters biological selecting area, biological selecting area sewage enters pre-reaction zone by overflow, do not establish aerating apparatus in the pre-reaction zone, can make the organism of part difficult degradation under anoxic condition, be converted into the material of easy degraded, improve the clearance of pollutent.After the pre-reaction zone processing, the Link Port of the bottom of sewage by being arranged on the dividing plate between main reaction region and the pre-reaction zone enters main reaction region with the advection fluidised form, main reaction region is established jet aerator and is strained hydrophone, sewage is at main reaction region process jet aerator aeration, carry out aerobic biodegradation, and then pass through precipitate phase and carry out solid-liquid separation, water outlet is discharged by straining hydrophone.The utility model also is provided with sludge reflux pump in main reaction region, be connected in biological selecting area, pre-reaction zone and the sludge sump by mud return line line and mud discharging pipeline, being used for settled mud refluxes and excess sludge discharge, main reaction region mud is back to biological selecting area and pre-reaction zone circular treatment respectively, when sludge concentration is too high in the reactor, excess sludge is entered sludge sump.The utility model also is provided with the backflow water pipe, and the backflow water pipe is connected to the winding shaft from rising pipe, a part of effluent recycling to winding shaft can be used to the into dilution of water.
The utlity model has following characteristics: 1) equipment flowsheet is simple, and structures are few, takes up an area of to economize, and cost is low.2) adopt continuous water inlet system, reduced the complicacy of operation, operational and administrative expenses is low.3) sedimentation effect is good since this stage stopped aeration, have only the water inlet and do not have water outlet, precipitation process remains static, the sludge settling time is abundant, good effect of separating solid from liquid, effluent quality height.4) operation scheme is flexible, in a cycle of operation, the variation of mixeding liquid volume and running status etc. can be grasped flexibly according to character, effluent quality and the operation function requirement etc. of concrete sewage in the working time in each stage, the reactor, generate the kinds of processes route.Same reactor only just can be handled waste water of different nature by changing run parameter.5) owing to be continuous water inlet, the water quality and quantity that each reaction zone bore is impartial, the anti impulsion load ability height of equipment.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Reference numeral lists as follows:
The 1-grid, 2-winding shaft, 3-biochemical reaction tank or ICEAS biochemical reaction tank, the 4-sludge sump, 5-biological selecting area, 6-pre-reaction zone, 7-main reaction region, 8-lift pump, the 9-variable valve of intaking, the 10-dividing plate, 11-jet aerator, 12-sludge reflux pump, 13-strains hydrophone, 14-outlet valve, 15-effluent recycling valve, 16-return valve I, 17 return valve II, 18-excess sludge discharge valve.
Embodiment
The utility model provides a kind of integrated domestic sewage treatment device that country sewage is handled that is suitable for, main process adopts ICEAS technology, this apparatus and process flow process is simple, take up an area of province, cost and operational and administrative expenses is low, operation scheme is flexible, and effluent quality can satisfy the I level B standard in the Water Pollutants Discharge Standards (DB11/307-2005) of Beijing's promulgation in 2005.
The purpose of this utility model is achieved through the following technical solutions: the village sanitary sewage enters sewage works, at first passes through grid, and the suspended substance and the floating matter of greater particle size in the sewage removed in interception, and lift pump and aerator are mentioned provide protection.Flow into the sewage winding shaft through the sewage after the grid processing, the effect of this winding shaft not only is used to install sump pump, also has certain sewage water yield regulatory function simultaneously.Sewage directly enters follow-up biological treatment section after promoting.The biological treatment section adopts ICEAS technology, not needing to be characterized in second pond and mud refluxing unit, and investment and working cost are low, and the SVI value is lower, and mud is easy to precipitation, does not produce the sludge bulking phenomenon generally speaking.
Described ICEAS technology is by forming by the reactor of certain hour order periodical operation operation.A complete operating process of ICEAS technology, that is the operating process of each batch reactor when handling waste water comprises following 4 stages: 1. reaction period; 2. precipitate the phase; 3. draining spoil disposal phase; 4. lay-up period.The operation condition of ICEAS technology is feature with the periodical operation.Wherein react, precipitation, draining spoil disposal to lay-up period end up being a cycle of operation.In a cycle of operation, the variation of mixeding liquid volume and running status etc. can be grasped flexibly according to character, effluent quality and the operation function requirement etc. of concrete sewage in the working time in each stage, the reactor.
ICEAS has following principal feature as method of wastewater treatment: spatially mix fully, complete pulling flow type on time, the speed of response height is significantly less than the volume of continous way in theory for the reaction tank that obtains same processing efficiency ICEAS technology, and the pond is many more, and the cumulative volume of IECEAS is more little.Its characteristics are as follows:
Technical process is simple, and structures are few, takes up an area of to economize, and cost is low.
Operational and administrative expenses is low.
Quiescent setting, good separating effect, effluent quality height.
Operation scheme is flexible, can generate the kinds of processes route.
Same reactor only just can be handled waste water of different nature by changing run parameter.The anti impulsion load ability height of technology.
(Fig. 1) explains the utility model below in conjunction with accompanying drawing.
Fig. 1 is a structural representation of the present utility model.As shown in Figure 1, integrated domestic sewage treatment device, comprise biochemical reaction tank 3, described biochemical reaction tank 3 is divided into main reaction region 7 and pre-reaction zone 6 by dividing plate 10, described main reaction region 7 is communicated with the bottom Link Port of pre-reaction zone 6 by described dividing plate 10, described pre-reaction zone 6 is communicated with biological selecting area 5, and described biological selecting area 5 is connected winding shaft 2 by pipeline with lift pump 8, is provided with grid 1 between described winding shaft 2 and the sanitary sewage import; Be provided with jet aerator 11, sludge reflux pump 12 in the described main reaction region 7 and strain hydrophone 13; The described hydrophone 13 of straining links to each other with rising pipe, and the sludge outlet of described sludge reflux pump 12 connects sludge sump 4, biological selecting area 5 and pre-reaction zone 6 respectively.The sludge outlet of described sludge reflux pump 12 is connected sludge sump 4 by pipeline with the excess sludge discharge valve.The sludge outlet of described sludge reflux pump 12 is connected biological selecting area 5 by pipeline with return valve.The sludge outlet of described sludge reflux pump 12 is connected pre-reaction zone 6 by pipeline with return valve.The top of described biological selecting area 5 is provided with the overflow port that is communicated with pre-reaction zone 6.Described biological selecting area 5 is arranged in the pre-reaction zone.Described lift pump 8 is arranged in the winding shaft 2.Described rising pipe is connected with outlet valve 14 respectively, and connects winding shaft 2 by effluent recycling valve 15.Described biochemical reaction tank 3 is intermittent cycle extended aeration activated sludge process biochemical reaction tanks.
Integrated domestic sewage treatment device mainly comprises grid 1, winding shaft 2, ICEAS biochemistry pool 3 and sludge sump 4, grid 1 is positioned at the sewage inlet place, the sewage import is led to winding shaft 2 through grid 1, lift pump 8 is set in the winding shaft 2, and lift pump 8 directly connects ICEAS biochemical reaction tank 3 by back with water inlet line; ICEAS biochemical reaction tank 3 is main bodys of integrated sewage treating apparatus, comprises biological selecting area 5, pre-reaction zone 6 and main reaction region 7, and the back with water inlet line that connects winding shaft 2 and ICEAS biochemical reaction tank 3 is directly connected in the biological selecting area 5; Biological selecting area 5 is arranged in pre-reaction zone 6, but be not communicated with between biological selecting area 5 and the pre-reaction zone 6, the sewage overflow of biological selecting area 5 enters in the pre-reaction zone 6, between main reaction region 7 and the pre-reaction zone 6 dividing plate 10 is set, Link Port is arranged at the bottom of dividing plate 10,6 do not establish aerating apparatus in the pre-reaction zone, establish jet aerator 11 in the main reaction region 7, sludge reflux pump 12 and strain hydrophone 13, sludge reflux pump 12 in the main reaction region 7 is connected respectively to biological selecting area 5 by mud return line line and mud discharging pipeline, in pre-reaction zone 6 and the sludge sump 4, strain hydrophone 13 and directly connect rising pipe, the backflow water pipe also is set to be connected to the winding shaft 8 from rising pipe, water outlet reverse flow valve 15 is set on the backflow water pipe simultaneously, on rising pipe, set out water valve 14, water inlet variable valve 9 is set on the back with water inlet line, return valve I and return valve II are set on the mud return line line, excess sludge discharge valve 18 is set on the mud discharging pipeline.
Working process of the present utility model: sanitary sewage at first passes through grid 1 from water-in, and the suspended substance and the floating matter of greater particle size in the sewage removed in interception.Flow into winding shaft 2 through the sewage after grid 1 processing, lift pump 8 is set in the winding shaft, water is risen to the biological selecting area 5 of ICEAS biochemical reaction tank 3, flooding quantity is regulated by water inlet variable valve 9, design biological selecting area 5 can suppress hyphomycetic growth and breeding effectively, overcomes sludge bulking.Biological selecting area 5 sewage overflows enter pre-reaction zone 6, and 6 do not establish aerating apparatus in the pre-reaction zone, are in anoxic condition, help the material that hardly degraded organic substance is converted into easy degraded, improve the clearance of pollutent.After pre-reaction zone 6 processing, sewage enters main reaction region 7 by the Link Port of dividing plate 10 bottoms with the advection fluidised form, in main reaction region 7, carry out intermittent aeration and precipitation is strained water, aeration phase, by jet aerator 11 intermittent oxygen supply in reaction tank, carry out aerobic biodegradation, and then the process precipitate phase carries out solid-liquid separation, stop oxygen supply in reaction tank this moment, active sludge under static state falls, and realizes mud-water separation, at sludge settling behind certain depth, straining hydrophone 13 starts working, discharge clear water by straining hydrophone 13, a water outlet part is back in the winding shaft 2 by the backflow water pipe, is used for the dilution to water inlet, another part directly discharges, and effluent recycling amount and quantity discharged are regulated by effluent recycling valve 14 and outlet valve 15.In straining the water process, because sludge settling is at the bottom of the pond, concentration is bigger, can start sludge reflux pump 12 as required, be used for mud and reflux and excess sludge discharge, the mud of main reaction region 7 is back to biological selecting area 5 and pre-reaction zone 6 respectively, the mud quantity of reflux is regulated by return valve I 16 and return valve II 17, when sludge concentration is too high in the reactor, open excess sludge discharge valve 18, excess sludge is entered sludge sump 4.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the invention, but do not limit the present invention in any way creation.Therefore, although this specification sheets has been described in detail the invention with reference to drawings and Examples,, it will be appreciated by those skilled in the art that still and can make amendment or be equal to replacement the invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the invention, and it all is encompassed in the middle of the protection domain of the invention patent.
Claims (9)
1. integrated domestic sewage treatment device, it is characterized in that, comprise biochemical reaction tank, described biochemical reaction tank is divided into main reaction region and pre-reaction zone by dividing plate, described main reaction region is communicated with the bottom Link Port of pre-reaction zone by described dividing plate, described pre-reaction zone is communicated with biological selecting area, and described biological selecting area is connected winding shaft by pipeline with lift pump, is provided with grid between described winding shaft and the sanitary sewage import; Be provided with jet aerator, sludge reflux pump in the described main reaction region and strain hydrophone; The described hydrophone of straining links to each other with rising pipe, and the sludge outlet of described sludge reflux pump connects sludge sump, biological selecting area and pre-reaction zone respectively.
2. integrated domestic sewage treatment device according to claim 1 is characterized in that, the sludge outlet of described sludge reflux pump is connected sludge sump by pipeline with the excess sludge discharge valve.
3. integrated domestic sewage treatment device according to claim 1 is characterized in that the sludge outlet of described sludge reflux pump is connected biological selecting area by pipeline with return valve.
4. integrated domestic sewage treatment device according to claim 1 is characterized in that the sludge outlet of described sludge reflux pump is connected pre-reaction zone by pipeline with return valve.
5. integrated domestic sewage treatment device according to claim 1 is characterized in that, the top of described biological selecting area is provided with the overflow port that is communicated with pre-reaction zone.
6. integrated domestic sewage treatment device according to claim 1 is characterized in that described biological selecting area is arranged in the pre-reaction zone.
7. integrated domestic sewage treatment device according to claim 1 is characterized in that described lift pump is arranged in the winding shaft.
8. integrated domestic sewage treatment device according to claim 1 is characterized in that described rising pipe is connected with outlet valve respectively, and connects winding shaft by the effluent recycling valve.
9. integrated domestic sewage treatment device according to claim 1 is characterized in that, described biochemical reaction tank is an intermittent cycle extended aeration activated sludge process biochemical reaction tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920109191XU CN201458903U (en) | 2009-06-19 | 2009-06-19 | Integrated domestic sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920109191XU CN201458903U (en) | 2009-06-19 | 2009-06-19 | Integrated domestic sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201458903U true CN201458903U (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920109191XU Expired - Lifetime CN201458903U (en) | 2009-06-19 | 2009-06-19 | Integrated domestic sewage treatment device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201458903U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111666A (en) * | 2014-06-19 | 2014-10-22 | 杨安康 | Optimized CAST domestic sewage sludge reduction control system and working method |
| CN106277552A (en) * | 2015-05-19 | 2017-01-04 | 浙江工商职业技术学院 | A kind of equipment for processing villages and small towns sewage |
-
2009
- 2009-06-19 CN CN200920109191XU patent/CN201458903U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104111666A (en) * | 2014-06-19 | 2014-10-22 | 杨安康 | Optimized CAST domestic sewage sludge reduction control system and working method |
| CN106277552A (en) * | 2015-05-19 | 2017-01-04 | 浙江工商职业技术学院 | A kind of equipment for processing villages and small towns sewage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Integral domestic sewage treatment equipment Effective date of registration: 20140814 Granted publication date: 20100512 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2014990000659 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20150930 Granted publication date: 20100512 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2014990000659 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Integral domestic sewage treatment equipment Effective date of registration: 20151106 Granted publication date: 20100512 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2015990000958 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100085, Beijing, Haidian District on the road No. 12, No. 1, building 4, A District, room 411-413 Patentee after: Tawa Polytron Technologies Inc Address before: 100085, Beijing, Haidian District on the road No. 26, Zhongguancun venture building, Room 303 Patentee before: TAWA (Beijing) Co., Ltd. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170307 Granted publication date: 20100512 Pledgee: Haidian Beijing science and technology enterprise financing Company limited by guarantee Pledgor: TAWA (Beijing) Co., Ltd. Registration number: 2015990000958 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100512 |