CN204251468U - A kind of small-sized integrated domestic sewage processing system - Google Patents
A kind of small-sized integrated domestic sewage processing system Download PDFInfo
- Publication number
- CN204251468U CN204251468U CN201420685645.9U CN201420685645U CN204251468U CN 204251468 U CN204251468 U CN 204251468U CN 201420685645 U CN201420685645 U CN 201420685645U CN 204251468 U CN204251468 U CN 204251468U
- Authority
- CN
- China
- Prior art keywords
- aerobic pond
- discarded
- pond
- diffusion cell
- processing system
- Prior art date
- 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 - Fee Related
Links
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a kind of small-sized integrated domestic sewage processing system, comprise set gradually in order anoxic pond, one-level Aerobic Pond, secondary Aerobic Pond, settling tank and diffusion cell, Chi Shui in Aerobic Pond enters one-level Aerobic Pond by the first dividing plate overflow, perforate is provided with below second partition, first overflow weir is set between secondary Aerobic Pond and settling tank, second overflow weir is set between settling tank and diffusion cell, in anoxic pond, one-level Aerobic Pond and secondary Aerobic Pond, 3 D elastic filler is housed; The rear end of settling tank is also provided with diffusion cell, fills three-layer filter in diffusion cell, is followed successively by the discarded common brick after discarded construction cement slag, discarded potlery tile sheet, pulverizing from top to bottom.The utility model eliminates the reflow process of common A/O technique, simplifies technique, and has set up diffusion cell, utilizes discarded material of construction, further enhances phosphor-removing effect, have less energy-consumption, low cost, easy care, the feature that treatment effect is good.
Description
Technical field
The utility model relates to sewage treatment area, more particularly, relates to a kind of small-sized integrated domestic sewage processing system.
Background technology
N and P is the nutritive element of biological growth, the body eutrophication that in water body, N, P too high levels is formed, under adapt circumstance condition, waterplant and algal blooms can be caused, in algae death subsequently and the different oxygen animalcule Metabolic activity of the consequent, dissolved oxygen in water body is probably depleted, causes Water quality to worsen and water ecological environment structure deteriorate.
Conventional second-stage treatment, although be effective to the organism removed in sewage and suspended solids, but sub-fraction wherein can only be removed to nitrogen simultaneous in sewage, phosphorus nutrition thing, remaining most of the nitrogen, phosphorus will with Chinese effluent to receiving water bodies, still to exist and in rising trend with the nitrogen in other sources, phosphorus nutrition thing to the pollution of water body and eutrophication harm.
A/O technique denitrification dephosphorization system, i.e. anoxic, aerobic nitrogen removal dephosphorization system.To be the seventies remove BOD in waste water primarily of the having of developing such as the U.S., South Africa for it
5, also have certain effect to dephosphorization simultaneously.Its technical process allows waste water experience anoxic, aerobic two stages successively, and old friends are commonly referred to as anaerobic-aerobic denitrification dephosphorization system, is called for short A/O system.A/O system flow is simple, take up an area less, operational management is convenient, during denitrification without the need to additional carbon, be easy to control the advantages such as sludge bulking and be widely used in dispersion type domestic wastewater process.But in existing A/O technique, sewage refluxes between Aerobic Pond and anoxic pond, therefore need to arrange between Aerobic Pond and anoxic pond to organize transferpump more, not only increase cost, and transferpump long term operation, energy consumption is high.There is the incomplete situation of denitrogenation dephosphorizing in existing A/O technique simultaneously.
Summary of the invention
The technical problems to be solved in the utility model is, provides a kind of small-sized integrated domestic sewage processing system, can cancel the reflow process of common A/O technique, and consolidation system is to the removal effect of nitrogen phosphorus.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of small-sized integrated domestic sewage processing system, comprise the anoxic pond set gradually in order, one-level Aerobic Pond, secondary Aerobic Pond, settling tank and diffusion cell, first dividing plate is set between described anoxic pond and one-level Aerobic Pond, between described one-level Aerobic Pond and secondary Aerobic Pond, second partition is set, Chi Shui in described Aerobic Pond enters one-level Aerobic Pond by the first dividing plate overflow, perforate is provided with below described second partition, between described secondary Aerobic Pond and described settling tank, the first overflow weir is set, second overflow weir is set between described settling tank and described diffusion cell, described anoxic pond, in one-level Aerobic Pond and secondary Aerobic Pond, 3 D elastic filler is housed, the rear end of described settling tank is also provided with diffusion cell, fills three-layer filter in described diffusion cell, is followed successively by the discarded construction cement slag after pulverizing, discarded potlery tile sheet, discarded common brick from top to bottom, separates between adjacent two-layer filtrate with river sand.
In such scheme, the particle diameter of the discarded common brick after pulverizing is greater than the particle diameter pulverizing rear discarded potlery tile sheet, and the particle diameter of the discarded potlery tile sheet after pulverizing is greater than the particle diameter pulverizing rear construction cement slag.
In such scheme, the particle diameter of the discarded common brick after pulverizing is 1-4cm, and the particle diameter of the discarded potlery tile sheet after pulverizing is 0.5-1cm, and after pulverizing, the particle diameter of discarded construction cement slag is 0.5-5mm, and laying river sand thickness between filter material layer is 5-10cm.
In such scheme, arrange water inlet pipe bottom described anoxic pond, described water inlet pipe connects the many arms be arranged in parallel, and described arm is provided with the posticum of multiple equidistant setting, and the aperture of described posticum reduces gradually along water (flow) direction.
In such scheme, the bottom of described arm is provided with two discharge water holes, and two central angles corresponding to arc tube wall of discharging between water hole are 90 °.
In such scheme, arrange many " L " shape thrust-augmenting nozzles below described first overflow weir, the horizontal section of described thrust-augmenting nozzle is positioned at the bottom of settling tank, and the horizontal section of described thrust-augmenting nozzle is provided with multiple posticum.
In such scheme, the bottom of described second overflow weir is provided with the many water distributors be arranged in parallel, and described water distributor is positioned at above diffusion cell, and the bottom of described diffusion cell is provided with rising pipe.
In such scheme, described 3 D elastic filler adopts polyolefins and polymeric amide macromolecular material, is evenly distributed in anoxic pond, one-level Aerobic Pond and secondary Aerobic Pond.
Implement small-sized integrated domestic sewage processing system of the present utility model, there is following beneficial effect:
1, the utility model is by the combination of A/O technique and technology of biological membrane, the interpolation of the 3 D elastic filler in anoxic pond, one-level Aerobic Pond and secondary Aerobic Pond improves the microbial biomass of system, the impact load of high system and enhance biological carbon and phosphorous removal effect.The utility model does not need to arrange backflow facility between anoxic pond and Aerobic Pond, reduces process costs and complexity, makes technique simpler, and it is easier to build, and also achieves the object of energy-saving and emission-reduction simultaneously.
2, diffusion cell is set, by physical chemistry and biological action, improves the removal ability of system to nitrogen phosphorus, improve effluent quality.Pond filtrate adopts waste construction material, normal calcium-magnesium-containing ferro-aluminum plasma in these materials, the Ca of dissolving
2+, Fe
3+, Mg
2+plasma can with PO
4 3 ?the raw precipitation of reaction, reaction equation is as follows:
Ca
2++PO
4 3‐→Ca
3(PO
4)
2↓
Fe
3++PO
4 3-→FePO
4↓
M
g 2++PO
4 3‐→Mg
3(PO
4)
2↓
3, discarded material of construction has larger surface-area, porosity is high, can form strong adsorption, have good effect to the removal of COD, SS and nitrogen phosphorus.
4, construction waste is simple and easy to get, does not need again to fire, and only need fragmentation simply to screen, save energy, turns waste into wealth simultaneously, solves the unmanageable problem of building castoff.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the side-view of small-sized integrated domestic sewage processing system;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the schematic diagram of the arm of water inlet pipe;
Fig. 4 is the sectional view of the arm of water inlet pipe.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1 and Figure 2, small-sized integrated domestic sewage processing system of the present utility model comprise set gradually in order anoxic pond 12, one-level Aerobic Pond 13, secondary Aerobic Pond 14, settling tank 7 and diffusion cell 10.
First dividing plate 16 is set between anoxic pond 12 and one-level Aerobic Pond 13, second partition 17 is set between one-level Aerobic Pond 13 and secondary Aerobic Pond 14, the Chi Shui of anoxic pond 12 enters one-level Aerobic Pond 13 by the first dividing plate 16 overflow, perforate 4 is provided with below second partition 17, first overflow weir 5 is set between secondary Aerobic Pond 14 and settling tank 7, second overflow weir 8 is set between settling tank 7 and diffusion cell 10, in anoxic pond 12, one-level Aerobic Pond 13 and secondary Aerobic Pond 14,3 D elastic filler is housed.3 D elastic filler adopts the macromolecular material such as polyolefins and polymeric amide, is evenly distributed in reaction tank, contributes to microbial film and be attached to filling surface.Gas, water, microbial film can be made in effective area fully to mix and to ooze contact exchange, improve sewage treating efficiency.
3 D elastic filler is that microorganic adhesion provides condition, constitute a Complex Ecological Systems be made up of multiple nourish grades such as bacterium, fungi, algae, protozoon, metazoans, improve biomass and the capacity of resisting impact load of aeration tank, and filler provides Activated sludge immobilization growing environment, be conducive to that rate of rise is low, nitrobacteria that generation time is long becomes dominant microflora in treatment system.There is in pond the microflora of suspension aerobic, attachment aerobic, attachment facultative type, the multiple different motion ability of adhering to anaerobic type, type of respiration, nutrient type simultaneously, thus make system likely complete the task of organic removal and denitrogenation dephosphorizing simultaneously, also can cancel the reflow process of common A/O technique simultaneously, without the need to arranging transferpump, cost-saving and quantities.
A/O-microbial film recombining process improves the processing efficiency of system, and without the need to backflow, sludge yield is little, have comparatively high water-base fluid, floor space is little, but also there are some defects, mainly technique is based on biological carbon and phosphorous removal, and temperature can affect the activity of microorganism, and then the Nitrogen/Phosphorus Removal of influential system, therefore also just there is the incomplete situation of denitrogenation dephosphorizing.
In order to ensure Nitrogen/Phosphorus Removal further, the utility model is provided with diffusion cell 10, three-layer filter 15 is filled in diffusion cell 10, be followed successively by the discarded construction cement slag 1501 after pulverizing, discarded potlery tile sheet 1502, discarded common brick 1503 from top to bottom, be highly respectively 0.4m, 0.4m, 0.4m, from top to bottom, particle diameter increases gradually, be respectively 0.5-5mm, 0.5-1cm, 1-4cm, be so not only conducive to the stable laying of filtrate, be also beneficial to the abundant absorption of filtrate to residual nitrogen phosphorus.Every metafiltration material is uniformly distributed, and interlayer river sand separates, and river sand thickness is 5-10cm.Discarded construction cement slag, potlery tile sheet and common brick adopt crusher to carry out fragmentation screening to reach corresponding particle diameter.
Arrange water inlet pipe 1 bottom anoxic pond 12, water inlet pipe 1 connects the many arms be arranged in parallel 2, and arm 2 is provided with the posticum 201 of multiple equidistant setting, and the aperture of posticum 201 reduces gradually along water (flow) direction, as shown in Figure 3.It is 90 ° that the bottom of arm 2 is provided with the central angle corresponding to arc tube wall of discharging between water hole 201 in two discharge water holes 201, two, as shown in Figure 4.Sewage, by after water inlet pipe 1, flows into orificed lateral 2, and now sewage is discharged water hole 201 outflow by two on arm 2 tube wall and entered anoxic pond 12.
Anoxic pond 12 adopts bottom upflowing water inlet, and arm 2 is uniformly distributed aperture, reduces the dissolved oxygen concentration produced because of top water inlet and increases, improve anaerobic treatment effect.The aperture in arm 2 upper water-out hole 201 reduces gradually along water (flow) direction, macrobead refuse in sewage can be discharged along larger posticum 201 as early as possible, posticum 201 aperture of front end can reduce more greatly the discharge pressure of front end, makes the surging force of whole arm 2 posticum 201 water outlet more even.
Now the anaerobism of anoxic pond 12 li and amphimicrobe decompose organism wherein, simultaneously a part of denitrifying bacteria denitrification NO wherein
3 -, carry out denitrification reaction, a part of polyP bacteria can carry out anaerobic phosphorus release reaction in local anaerobic environment, and the polyP bacteria that another part has a denitrification phosphorus-collecting effect can utilize NO wherein
3 -denitrification phosphorus-collecting.
One-level Aerobic Pond 13 is entered by the direct overflow of the first dividing plate 16 upper end open 3 after anoxic pond 12 water is full, and enter secondary Aerobic Pond 14 by the connection of second partition 17 lower ending opening 4, two-stage aerobic installs aerating apparatus in pond, aeration gas flow makes sewage rolling in pond, make each portion dissolved oxygen content in Aerobic Pond consistent, make sewage fully contact with microbial film simultaneously, microorganism continues degraded organism wherein, aerobic environment, can promote the aerobic suction phosphorus effect of the nitration reaction of bacterium and polyP bacteria simultaneously.Simultaneously due to anaerobism and the anaerobic environment of the formation of microbial film inside, also can promote denitrification, strengthen denitrification ability.
Arrange many " L " shape thrust-augmenting nozzles 6 below first overflow weir 5, the horizontal section of thrust-augmenting nozzle 6 is positioned at the bottom of settling tank 7.The bottom arranging the second overflow weir 8, second overflow weir 8 between settling tank 7 and diffusion cell 10 is provided with the many water distributors be arranged in parallel 9, and water distributor 9 is positioned at above diffusion cell 10, and the bottom of diffusion cell 10 is provided with rising pipe 11.
Water in secondary Aerobic Pond 14 enters the first overflow weir 5 through over-pass, enters settling tank 7 by 3 thrust-augmenting nozzles 6 from bottom.The horizontal section of thrust-augmenting nozzle 6 is provided with multiple posticum, the set-up mode of the horizontal section posticum of thrust-augmenting nozzle 6 is identical with posticum 201 set-up mode on the arm 2 of aforementioned water inlet pipe 1, such water outlet is uniform and stable, due to the shunting action of two thrust-augmenting nozzles 6, slow down flow rate of water flow, also reduce the surging force of current, avoid settling tank 7 disturbance.The inclined design at settling tank 7 end is also conducive to slowing down flow rate of water flow simultaneously, is beneficial to sedimentation effect.Sewage in settling tank 7 collides through swash plate, makes particulate matter return to bottom, thus reaches the effect of precipitation, make the sewage mud-water separation after process, mud is due to the obstruction on swash plate and inclined-plane, and deposit to bottom settling tank 7, supernatant fraction enters the second overflow weir 8 by the mode of overflow.Sewage in second overflow weir 8 enters diffusion cell 10 by water distributor 9, flows through equally distributed aperture and realizes water distribution uniformity.After sewage evenly enters diffusion cell 10 filter material layer 15, pollutent is retained by filtration, adsorb and the effect such as biological degradation is removed.Water outlet is flowed out from rising pipe 11 bottom diffusion cell 10.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model aim and claim protect, also can make a lot of form, these all belong within protection of the present utility model.
Claims (8)
1. a small-sized integrated domestic sewage processing system, comprise the anoxic pond set gradually in order, one-level Aerobic Pond, secondary Aerobic Pond, settling tank and diffusion cell, it is characterized in that, first dividing plate is set between described anoxic pond and one-level Aerobic Pond, between described one-level Aerobic Pond and secondary Aerobic Pond, second partition is set, Chi Shui in described Aerobic Pond enters one-level Aerobic Pond by the first dividing plate overflow, perforate is provided with below described second partition, between described secondary Aerobic Pond and described settling tank, the first overflow weir is set, second overflow weir is set between described settling tank and described diffusion cell, described anoxic pond, in one-level Aerobic Pond and secondary Aerobic Pond, 3 D elastic filler is housed, the rear end of described settling tank is also provided with diffusion cell, fills three-layer filter in described diffusion cell, is followed successively by the discarded construction cement slag after pulverizing, discarded potlery tile sheet, discarded common brick from top to bottom, separates between adjacent two-layer filtrate with river sand.
2. small-sized integrated domestic sewage processing system according to claim 1, it is characterized in that, the particle diameter of the discarded common brick after pulverizing is greater than the particle diameter pulverizing rear discarded potlery tile sheet, and the particle diameter of the discarded potlery tile sheet after pulverizing is greater than the particle diameter pulverizing rear construction cement slag.
3. small-sized integrated domestic sewage processing system according to claim 1, it is characterized in that, the particle diameter of the discarded common brick after pulverizing is 1-4cm, the particle diameter of the discarded potlery tile sheet after pulverizing is 0.5-1cm, after pulverizing, the particle diameter of discarded construction cement slag is 0.5-5mm, and laying river sand thickness between filter material layer is 5-10cm.
4. small-sized integrated domestic sewage processing system according to claim 1, it is characterized in that, bottom described anoxic pond, water inlet pipe is set, described water inlet pipe connects the many arms be arranged in parallel, described arm is provided with the posticum of multiple equidistant setting, and the aperture of described posticum reduces gradually along water (flow) direction.
5. small-sized integrated domestic sewage processing system according to claim 4, is characterized in that, the bottom of described arm is provided with two discharge water holes, and two central angles corresponding to arc tube wall of discharging between water hole are 90 °.
6. small-sized integrated domestic sewage processing system according to claim 1, it is characterized in that, arrange many " L " shape thrust-augmenting nozzles below described first overflow weir, the horizontal section of described thrust-augmenting nozzle is positioned at the bottom of settling tank, and the horizontal section of described thrust-augmenting nozzle is provided with multiple posticum.
7. small-sized integrated domestic sewage processing system according to claim 1, is characterized in that, the bottom of described second overflow weir is provided with the many water distributors be arranged in parallel, and described water distributor is positioned at above diffusion cell, and the bottom of described diffusion cell is provided with rising pipe.
8. small-sized integrated domestic sewage processing system according to claim 1, is characterized in that, described 3 D elastic filler adopts polyolefins and polymeric amide macromolecular material, is evenly distributed in anoxic pond, one-level Aerobic Pond and secondary Aerobic Pond.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420685645.9U CN204251468U (en) | 2014-11-14 | 2014-11-14 | A kind of small-sized integrated domestic sewage processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420685645.9U CN204251468U (en) | 2014-11-14 | 2014-11-14 | A kind of small-sized integrated domestic sewage processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
CN204251468U true CN204251468U (en) | 2015-04-08 |
Family
ID=52955795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201420685645.9U Expired - Fee Related CN204251468U (en) | 2014-11-14 | 2014-11-14 | A kind of small-sized integrated domestic sewage processing system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN204251468U (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106745752A (en) * | 2017-02-21 | 2017-05-31 | 湖南博世科华亿环境工程有限公司 | A kind of sewage disposal device and method |
CN106966545A (en) * | 2017-06-06 | 2017-07-21 | 重庆四通八达管业有限公司 | Integrated sewage disposal liquid-solid separation equipment |
CN109928568A (en) * | 2017-12-18 | 2019-06-25 | 宜兴市江华环保科技有限公司 | City domestic sewage treatment process |
CN111018073A (en) * | 2019-12-25 | 2020-04-17 | 长沙华时捷环保科技发展股份有限公司 | Phosphorus removing agent and preparation method and application thereof |
CN112209507A (en) * | 2020-09-24 | 2021-01-12 | 贵州润鸿环保科技有限公司 | Combined type domestic sewage treatment system for small and medium-scale villages and towns |
CN114477615A (en) * | 2021-11-30 | 2022-05-13 | 中化学朗正环保科技有限公司 | Low-energy-consumption sewage treatment system |
-
2014
- 2014-11-14 CN CN201420685645.9U patent/CN204251468U/en not_active Expired - Fee Related
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106745752A (en) * | 2017-02-21 | 2017-05-31 | 湖南博世科华亿环境工程有限公司 | A kind of sewage disposal device and method |
CN106966545A (en) * | 2017-06-06 | 2017-07-21 | 重庆四通八达管业有限公司 | Integrated sewage disposal liquid-solid separation equipment |
CN109928568A (en) * | 2017-12-18 | 2019-06-25 | 宜兴市江华环保科技有限公司 | City domestic sewage treatment process |
CN111018073A (en) * | 2019-12-25 | 2020-04-17 | 长沙华时捷环保科技发展股份有限公司 | Phosphorus removing agent and preparation method and application thereof |
CN111018073B (en) * | 2019-12-25 | 2021-04-30 | 长沙华时捷环保科技发展股份有限公司 | Phosphorus removing agent and preparation method and application thereof |
CN112209507A (en) * | 2020-09-24 | 2021-01-12 | 贵州润鸿环保科技有限公司 | Combined type domestic sewage treatment system for small and medium-scale villages and towns |
CN114477615A (en) * | 2021-11-30 | 2022-05-13 | 中化学朗正环保科技有限公司 | Low-energy-consumption sewage treatment system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN204251468U (en) | A kind of small-sized integrated domestic sewage processing system | |
CN101792228B (en) | Double-layer artificial wetland system for strengthening sewage denitrification and dephosphorization and operation method thereof | |
CN103936229B (en) | A kind of municipal sewage improvement A2/ O intensified denitrification and dephosphorization processes device and technique | |
CN101698556B (en) | Treatment method and treatment device of wastewater from middle stage of wheat straw pulp during paper-making | |
CN102320689B (en) | Continuous flow granular sludge reactor and running method | |
CN101333037A (en) | Gas-lifting internal circulation intermission aerobic granule sludge reactor and water treatment process thereof | |
CN110902948B (en) | Rural distributed domestic sewage treatment process and system for strengthening phosphorus removal and recovery | |
CN206289143U (en) | A kind of sewage treatment unit of dynamic glass-reinforced plastic material | |
CN106116045A (en) | A kind of efficiently villages and small towns waste water treating and reutilizing device and technique thereof | |
CN204151131U (en) | A kind of Anti-plugging biological aerated filter | |
CN106630379A (en) | Buried type glass fiber reinforced plastic integrated sewage treatment equipment and process | |
CN110668575A (en) | Full-automatic efficient nitrogen and phosphorus removal tidal flow constructed wetland and use method thereof | |
CN111099726A (en) | Synchronous denitrification and dephosphorization double-sludge sewage treatment system and treatment process thereof | |
CN203946948U (en) | Baf | |
CN206512058U (en) | A kind of efficient villages and small towns waste water treating and reutilizing device | |
CN103708621B (en) | Combined artificial wetland system and sewage treatment method thereof | |
CN107337270B (en) | Bottom-inlet efficient denitrification aerobic granular sludge reactor with adjustable water inlet height and treatment process | |
CN209940597U (en) | Device for removing nitrate nitrogen by sulfur-iron coupling technology | |
CN111747605A (en) | Multistage physicochemical-biochemical combined domestic sewage treatment system and treatment method | |
CN218146052U (en) | Biochemical and physical integrated treatment tank for village and town sewage A2O | |
CN110713315A (en) | Special sewage treatment device for sewage plant in villages and towns and treatment method thereof | |
CN104211262B (en) | Sewage ecological treatment system | |
CN208038251U (en) | A kind of family sewage-treatment plant | |
CN207091107U (en) | Batch-type multistage AO Activated sludge-biofilm composite bioreactors | |
CN212269816U (en) | Aged landfill leachate non-concentrated solution treatment system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20181114 |