CN206266390U - It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks - Google Patents
It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks Download PDFInfo
- Publication number
- CN206266390U CN206266390U CN201621119107.9U CN201621119107U CN206266390U CN 206266390 U CN206266390 U CN 206266390U CN 201621119107 U CN201621119107 U CN 201621119107U CN 206266390 U CN206266390 U CN 206266390U
- Authority
- CN
- China
- Prior art keywords
- packing layer
- bed filter
- water
- denitrification deep
- bed
- 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.)
- Active
Links
Abstract
Alleviate the device that denitrification deep-bed filter top layer blocks the utility model discloses a kind of, belong to field of waste water treatment.Its device includes sedimentation basin, regulating reservoir, denitrification deep-bed filter, clear water reserviors, medicine storing pot one, medicine storing pot two；The denitrification deep-bed filter is disposed with gas collector, even water distributor, the first packing layer, the second packing layer, electrodialytic membranes from top to bottom, and certain interval is left between first packing layer and second packing layer and between second packing layer and the electrodialytic membranes.By the utility model device and processing method, solid impurity can pass through the top layer of filter bed, reach the effect that whole filter tank Cong Shen retains suspension, extend the cycle of operation in filter tank, reduce backwash number of times；Carbon source dosage is reduced simultaneously, and effluent quality is further lifted.
Description
Technical field
The utility model is related to technical field of waste water processing, is specifically related to a kind of denitrification deep-bed filter top layer of alleviating and blocks up
The device of plug.
Background technology
Often contain a certain amount of nitrate nitrogen, phosphorus and solid suspension etc. in current secondary effluent from sewage treatment plant, directly
Run in and can cause the excessive accumulation of water nutrition material into river and lake, or even cause wawter bloom etc..National environmental protection goal
Urban wastewater treatment firm strict implement《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) one-level A marks
Standard, has requirement higher to water outlet after Sewage Plant treatment.Therefore, exigence carries out technology and changes to existing sewage treatment plant
Upgrading is made, to remove the nitrate in secondary effluent and suspended solid.
Denitrification deep-bed filter be it is a kind of integrate denitrification biological denitrogenation and filtering function, pond body simple structure,
Operating cost is low, convenient operation and management advanced treatment of wastewater unit.The principle of its work is that sewage is flowed through under gravity
During filler inside filter tank, nitrite and nitrate reduction are by accompanying biomembrane in the state of anoxic on filler
Nitrogen；At the same time, under the Physical entrapment of filler and suction-operated, water inlet suspended solid is also removed.Into denitrification depth
The sewage in bed filter tank, generally by the sewage water of secondary biochemical treatment, COD is relatively low, and most denitrifying bacteriums are heterotrophs, are
Ensureing the Effec-tive Function in filter tank need to add a certain amount of carbon source, to reach the purpose of efficient denitrification.
Due to generally existing dissolved oxygen in secondary effluent, cause filtrate top layer heterotroph molten using the carbon source consumption in water inlet
Solution oxygen, filter tank top layer heterotroph amount reproduction reduces the space of upper strata filtrate；Simultaneously because the suspension of filtrate top layer retention is consolidated
Body, both collective effects cause that filtrate top layer forms " mud blanket " phenomenon in a short time, and filter bed resistance rises suddenly, treating capacity
Drastically decline.
In order to ensure treatment effeciency and reduction expense, existing method is from strict control carbon source dosage and filter tank work(mostly
The separation angle of energy is started with.Such as China Patent No.：201320039384.9, publication date：On 07 17th, 2013, disclose portion
A kind of patent application document in entitled compound deep bed denitrification denitrogenation filter tank, the utility model is related to a kind of compound deep anti-nitre of bed
Change denitrogenation filter tank, be provided with filter tank, clear water reserviors, carbon source dosing system and cesspool, denitrification biological bed, quartz are provided with the filter tank
Sand filter bed, supporting layer, W type filter block mixing wastewater with air area.Denitrification biological bed using natural cellular volcanic rock biologic packing material in hole high and
Quartz sand filter media is combined, and substep completes denitrogenation and removes oil removal.China Patent No.：201410140512.8, publication date：2014
In 09 day 04 month year, the patent application document of a entitled denitrification deep-bed filter carbon source intelligent precise gambling systems is disclosed,
The utility model is related to a kind of denitrification deep-bed filter carbon source intelligent precise dosing system, is provided with water inlet, COD water inlet detections
Instrument, dosing measuring pump, water inlet measuring pump, central control system, dissolved oxygen instrument, pH instrument, thermometer, denitrification deep-bed filter, COD
Water outlet detector, delivery port and intake-outlet nitrate analysis instrument, according to the COD, flow, dissolved oxygen, temperature and the pH that are gathered
Value signal, carbon source dosage is controlled by central control system.The above patent is separated by filter tank function or carbon source is accurate
Add to mitigate filter tank top layer blockage problem, but fail to reduce the heterotrophism caused by heterotroph is using carbon source consumption dissolved oxygen
The retention of bacterium amount reproduction or suspension and the filtrate top layer caused blocks.
Utility model content
For drop streaming denitrification deep-bed filter filtrate top layer because heterotroph amount reproduction and suspension retention and caused by
Filtrate top layer blockage problem, the technical problem that the utility model is solved is to provide a kind of denitrification deep-bed filter top layer of alleviating and blocks
Device, ensure water outlet SS and total nitrogen concentration it is constant or lower on the premise of, can effectively increase denitrification deep-bed filter
The cycle of operation, reduce the number of times of backwash, and reduce the dosage of carbon source.
In order to solve the above technical problems, the technical solution of the utility model is：
It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks, mainly including sedimentation basin, regulating reservoir, denitrification depth bed
Filter tank, clear water reserviors, medicine storing pot one, medicine storing pot two；Connected by pipeline between the sedimentation basin, regulating reservoir and denitrification deep-bed filter
Connect, the medicine storing pot one and the medicine storing pot two are passed through the regulating reservoir, the medicine storing pot one and the tune by pipeline respectively
Pipeline between section pond is provided with control valve one, and the pipeline between the medicine storing pot two and the regulating reservoir is provided with control valve
Two, the denitrification deep-bed filter is disposed with gas collector, even water distributor, the first packing layer, from top to bottom
Two packing layers, electrodialytic membranes, between first packing layer and second packing layer and second packing layer with it is described
Certain interval is left between electrodialytic membranes, it is clear with described by processing water discharge pipe in the bottom of the denitrification deep-bed filter
Pond is connected, and the backwashing pump is located between the bottom of clear water reserviors and the denitrification deep-bed filter by backwash tube；Institute
State medicine storing pot one it is built-in be sodium acetate and methyl alcohol mixed solution, mol ratio therebetween is 3:2；In the medicine storing pot two
Dress is that mass concentration is the rhamnolipid solution of 30-40%.
Further, it is described to be respectively equipped with above first packing layer, the second packing layer instead in such scheme
Rinse water out one, backwashing water outlet two.
Further, in such scheme, the even water distributor is made up of classification water-distributing device, total by water inlet respectively
Pipe, supervisor, branch pipe and the equally distributed water-locator composition of water distributing pore.
Further, in such scheme, first packing layer is zeolite, and selection particle diameter is 7-8mm, density 2.0-
2.4g/cm3。
Further, in such scheme, second packing layer is made up of quartz sand, selection particle diameter 2-4mm.
Further, in such scheme, the electrodialytic membranes is made up of cavity block and anode membrane.
A kind of operation method for alleviating the device that denitrification deep-bed filter top layer blocks, step is：
A) pending waste water is passed through sedimentation basin and carries out preliminary sedimentation by original water inlet, is passed through in regulating reservoir, opens control valve
One, by medicine storing pot one to the mixed solution that sodium acetate and methyl alcohol are added in regulating reservoir so that the COD/N in water inlet is equal to 3-5；
B) the first packing layer that current are entered in denitrification deep-bed filter by even water distributor, particle diameter is larger in water inlet
Suspended solid is removed under the absorption crown_interception of zeolite, while ammonia nitrogen a small amount of in water inlet is also adsorbed removal, big particle diameter
Suspended solid and part DO are removed；
C) current continue through the second packing layer in denitrification deep-bed filter, and the quartz sand filler of the second packing layer is to water
Stream carries out absorption retention, and SS and nitrate are removed by the denitrification of denitrifying bacterium, and denitrifying bacterium is using the carbon in water inlet
NO3-N and NO2-N is reduced to nitrogen by source, and nitrogen is collected by the gas collector, and is arranged from gas discharge outlet
Go out, until when filter tank filtering velocity declines and stablizes, adjusting control valve one makes the flow of the mixed solution of sodium acetate and methyl alcohol to initial
The 30-45% of flow；Until when filter tank filtering velocity is less than the 50-65% for designing filtering velocity, then the flow for adjusting section control valve one；
D) current continue through electrodialytic membranes, the water absorption and swelling after additional power source is powered to electrodialytic membranes, in water
Electrolyte carries out adsorbing separation；
E control valve two) is opened, rhamnolipid solution is added, the rhamnolipid mass concentration in the water inlet for making is 60-
80mg/L, runs the denitrification deep-bed filter, carries out the dispersion and separation of filter top layer trapped substance；The operation of the step
Time determines by the recovery time of filter tank filtering velocity, when filter tank filtering velocity raise and during to maintenance level adjusting control valve two stream
Amount；Rhamnolipid solution can promote the dispersion of microorganism extracellular polymeric, suspension, reduce particle diameter, break blocking filter tank top layer
" mud blanket ", the carbon source at the same time as microorganism is degraded；
F) until filter tank filtering velocity increases and when stablizing, adjusting control valve two makes the flow of rhamnolipid solution to step C
The 30-50% of middle flow, adjusting control valve one makes the 60- of flow in flow to the step A of the mixed solution of sodium acetate and methyl alcohol
70%, filter tank is continued to run with, complete the dispersion of filter top layer trapped substance；The flow of adjusting control valve one again so that filter tank
COD is less than or equal to the water outlet COD before adjusting control valve one in water outlet；
G) when water outlet suspended sediment concentration is higher than that 10mg/L or filtering velocity are less than the 60% of design filtering velocity, backwash is started
Pump, the water in a part of clear water reserviors is used to backwash, and backwash is divided into two stages, and the first stage, is to the second packing layer
Backwash, closes backwashing water outlet one, opens backwashing water outlet two, and backwashing water is flowed out by backwashing water outlet two；The
Two-stage is the backwash to the first packing layer, closes backwashing water outlet two, opens backwashing water outlet one, backwashing water
Flowed out by backwashing water outlet one.
Rhamnolipid is added to during into water, and suspension is broken up into the suspension of small particle under its solubilization in water inlet
Thing, while biodegradable COD is increased in water inlet.When rhamnolipid solution enters into filtrate top layer, in its effect
Under, the suspension and microorganism extracellular polymeric of the retention of filtrate top layer are disperseed, and then break the flocculation structure of microorganism formation,
Increase the porosity of top layer filtrate, flowing into lower floor's filtrate with current by scattered microorganism and suspension is trapped, and reaches filtrate
Depth retains the excellent effect of suspension, while ensureing effluent quality.When filter tank filtering velocity drops to the 50-65% of initial filtering velocity
When, to rhamnolipid is added in regulating reservoir, making its concentration for 60-80mg/L, after operation 6-7 days, filter tank filtering velocity can be recovered to first
The 86-89% of beginning filtering velocity, filter tank first time backwashing time extends to the 29-32 days for 16-19 days by.
The beneficial effects of the utility model are：
(1) device of the present utility model adds biodegradable, environment-friendly rhanolipid as biosurfactant, energy
Suspension in effective dispersion water inlet, reduces suspension particle diameter, increases biodegradable COD contents in raw water, can reduce outer
Plus carbon source, while reducing the possibility of the filter top layer blocking that suspension is caused.
(2) rhamnolipid that the utility model is added can effective solubilized microorganism extracellular polymeric, break by microorganism
The filtrate top layer " mud blanket " constituted with suspension, the smaller particle of particle diameter is separated into by top layer " mud blanket ", and lower floor is flowed into current
Filtrate, reaches the excellent effect that filtrate suspends from deep retention.
(3) rhamnolipid that the utility model is added can effectively improve filtrate porosity, can efficiently carry out denitrification and take off
Nitrogen is again filtering ponds, extends the filter tank work period, saves backwash number of times, additional carbon dosage is reduced, in original filter tank base
On plinth, only increase by the second medicine system, technological transformation low cost, operation operational management is convenient, and effluent quality is high, builds and runs
Low cost.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Wherein, 1- original water inlets, 2- sedimentation basins, 3- regulating reservoirs, 4- reactor bodies, 5- clear water reserviors, the packing layers of 6- first,
The packing layers of 7- second, 8- electrodialytic membranes, 9- even water distributors, 10- backwashing waters export one, 11- backwashing waters and export two, 12-
Gas collector, 13- gas discharge outlets, 14- medicine storing pots one, 15- medicine storing pots two, 16- control valves one, 17- control valves two,
18- processes water discharge pipe, 19- backwash water pipes, 20- backwashing pumps.
Specific embodiment
To further appreciate that content of the present utility model, the utility model is made with reference to embodiment further retouch
State.
Embodiment 1：
As shown in figure 1, a kind of alleviate the device that denitrification deep-bed filter top layer blocks, mainly include sedimentation basin 2, regulating reservoir
3rd, denitrification deep-bed filter 4, clear water reserviors 5, medicine storing pot 1, medicine storing pot 2 15；The sedimentation basin 2, regulating reservoir 3 and denitrification depth
Bed is connected between filter tank 4 by pipeline, and the medicine storing pot 1 and the medicine storing pot 2 15 are passed through the tune by pipeline respectively
Section pond 3, the pipeline between the medicine storing pot 1 and the regulating reservoir 3 be provided with control valve 1, the medicine storing pot 2 15 with
Pipeline between the regulating reservoir 3 is provided with control valve 2 17, and the denitrification deep-bed filter 4 is disposed with gas from top to bottom
Body collection device 12, even water distributor 9, the first packing layer 6, the second packing layer 7, electrodialytic membranes 8, first packing layer 6 with
Certain interval is left between second packing layer 7 and between second packing layer 7 and the electrodialytic membranes 8, it is described
Backwashing water outlet one 10, backwashing water outlet 2 11 is respectively equipped with the top of first packing layer 6, the second packing layer 7,
The even water distributor 9 is made up of classification water-distributing device, equally distributed by water inlet manifold, supervisor, branch pipe and water distributing pore respectively
Water-locator is constituted；It is connected with the clear water reserviors 5 by processing water discharge pipe 18 in the bottom of the denitrification deep-bed filter 4, institute
Backwashing pump 20 is stated to be located between the bottom of clear water reserviors 5 and the denitrification deep-bed filter 4 by backwash tube 19；The drug storage
Tank 1 it is built-in be sodium acetate and methyl alcohol mixed solution, mol ratio therebetween is 3:2；The medicine storing pot 2 15 is built-in
Be mass concentration be 30-40% rhamnolipid solution.
Wherein, first packing layer 6 is zeolite, and selection particle diameter is 7mm, density 2.0g/cm3.Second packing layer 7
It is made up of quartz sand, selection particle diameter 2mm.The electrodialytic membranes is made up of cavity block and anode membrane.
The operation method of the device that the alleviation denitrification deep-bed filter top layer blocks, step is：
A) pending waste water is passed through sedimentation basin 2 and carries out preliminary sedimentation by original water inlet 1, is passed through in regulating reservoir 3, opens control
Valve 1, by medicine storing pot 1 to the mixed solution that sodium acetate and methyl alcohol are added in regulating reservoir 3 so that the COD/N in water inlet
Equal to 3-5；
B) the first packing layer 6 that current are entered in denitrification deep-bed filter 4 by even water distributor 5, in water inlet particle diameter compared with
Big suspended solid is removed under the absorption crown_interception of zeolite, while ammonia nitrogen a small amount of in water inlet is also adsorbed removal, greatly
Particle diameter suspended solid and part DO are removed；
C) current continue through the second packing layer 7 in denitrification deep-bed filter 4, the quartz sand filler of the second packing layer 7
Absorption retention is carried out to current, SS and nitrate are removed by the denitrification of denitrifying bacterium, denitrifying bacterium is using in water inlet
Carbon source NO3-N and NO2-N is reduced to nitrogen, nitrogen is collected by the gas collector 12, and from gas row
Outlet 13 is discharged, until when filter tank filtering velocity declines and stablizes, adjusting control valve 1 makes the mixed solution of sodium acetate and methyl alcohol
Flow to initial flow 30-45%；Until when filter tank filtering velocity is less than the 50-65% for designing filtering velocity, then adjust section control valve one
16 flow；
D) current continue through electrodialytic membranes, the water absorption and swelling after additional power source is powered to electrodialytic membranes, in water
Electrolyte carries out adsorbing separation；
E control valve 2 17) is opened, rhamnolipid solution is added, the rhamnolipid mass concentration in the water inlet for making is 60-
80mg/L, runs the denitrification deep-bed filter, carries out the dispersion and separation of filter top layer trapped substance；The operation of the step
Time determines by the recovery time of filter tank filtering velocity, when filter tank filtering velocity raise and during to maintenance level adjusting control valve 2 17 stream
Amount；Rhamnolipid solution can promote the dispersion of microorganism extracellular polymeric, suspension, reduce particle diameter, break blocking filter tank top layer
" mud blanket ", the carbon source at the same time as microorganism is degraded；
F) until filter tank filtering velocity increases and when stablizing, adjusting control valve two (17) makes the flow of rhamnolipid solution to C
The 30-50% of flow in step, adjusting control valve one (16) makes to be flowed in flow to the step A of the mixed solution of sodium acetate and methyl alcohol
The 60-70% of amount, continues to run with filter tank, completes the dispersion of filter top layer trapped substance；The stream of adjusting control valve one (16) again
Amount so that COD is less than or equal to the water outlet COD before adjusting control valve one (16) in the water outlet of filter tank；
G) when water outlet suspended sediment concentration is higher than that 10mg/L or filtering velocity are less than the 60% of design filtering velocity, backwashing pump is started
(20), the water in a part of clear water reserviors (5) is used to backwash, and backwash is divided into two stages, and the first stage, is to the second filler
The backwash of layer (7), closes backwashing water outlet one (10), opens backwashing water outlet two (11), and backwashing water is by backwashing
Water out two (11) flows out；Second stage is the backwash to the first packing layer (6), closes backwashing water outlet two (11),
Backwashing water outlet one (10) is opened, backwashing water is flowed out by backwashing water outlet one (10).
Embodiment 2
With embodiment 1, except that, first packing layer 6 is zeolite, and selection particle diameter is 7.5mm, density 2.2g/
cm3；Second packing layer 7 is made up of quartz sand, selection particle diameter 3mm；When filter tank filtering velocity drops to the 60% of initial filtering velocity,
Open the second doser so that the concentration of rhamnolipid is 70mg/L, now adjust the flow of the first doser to initial flow
40%, filter tank filtering velocity is recovered to the 91% of initial filtering velocity after operation 6 days, and the trend of stabilization, the around here removal of nitrate nitrogen is presented
In 83-88%, the time of filter tank backwash for the first time extended to the 31st day to rate stabilization by the 17th day.Influent quality Parameters variation：
Influent COD 80-115mg/L, TN 20-26mg/L, TP 0.7-1.1mg/L, SS 19-31mg/L, NO3-N 20-24mg/L；
Water outlet COD 22-36mg/L, TN 2.6-4.5mg/L, TP 0.09-0.21mg/L, SS 2.3-3.9mg/L, NO-N 0.9-
1.6mg/L。
Embodiment 3
With embodiment 1, except that, first packing layer 6 is zeolite, and selection particle diameter is 8mm, density 2.4g/
cm3.Second packing layer 7 is made up of quartz sand, selection particle diameter 4mm.When filter tank filtering velocity drops to the 50% of initial filtering velocity,
Open the second doser so that the concentration of rhamnolipid is 80mg/L, now adjust the flow of the first doser to initial flow
30%, filter tank filtering velocity is recovered to the 86% of initial filtering velocity after operation 7 days, and the trend of stabilization, the around here removal of nitrate nitrogen is presented
In 81-84%, the time of filter tank backwash for the first time extended to the 32nd day to rate stabilization by the 19th day.Influent quality Parameters variation：
Influent COD 80-115mg/L, TN 20-26mg/L, TP 0.7-1.1mg/L, SS 19-31mg/L, NO3-N 20-24mg/L；
Water outlet COD 27-46mg/L, TN 2.7-4.4mg/L, TP 0.08-0.25mg/L, SS 3.3-5.9mg/L, NO-N 0.87-
1.54mg/L。
Above-described is only preferred embodiment of the present utility model, is not used to limit the utility model, it is all
Any modification, equivalent and improvement made within spirit of the present utility model and principle etc., should be included in this practicality new
Within the protection domain of type.
Claims (5)
1. it is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks, mainly including sedimentation basin (2), regulating reservoir (3), denitrification
Deep-bed filter (4), clear water reserviors (5), medicine storing pot one (14), medicine storing pot two (15)；The sedimentation basin (2), regulating reservoir (3) and anti-nitre
Connected by pipeline between change deep-bed filter (4), the medicine storing pot one (14) and the medicine storing pot two (15) pass through pipeline respectively
The regulating reservoir (3) is passed through, the pipeline between the medicine storing pot one (14) and the regulating reservoir (3) is provided with control valve one
(16), the pipeline between the medicine storing pot two (15) and the regulating reservoir (3) is provided with control valve two (17), the denitrification depth
Bed filter tank (4) is disposed with gas collector (12), even water distributor (9), the first packing layer (6), second from top to bottom
Packing layer (7), electrodialytic membranes (8), between first packing layer (6) and second packing layer (7) and described second fills out
Certain interval is left between the bed of material (7) and the electrodialytic membranes (8), is passed through in the bottom of the denitrification deep-bed filter (4)
Treatment water discharge pipe (18) is connected with the clear water reserviors (5), and backwashing pump (20) is located at clear water reserviors (5) by backwash tube (19)
And the bottom of the denitrification deep-bed filter (4) between.
2. the device that a kind of alleviation denitrification deep-bed filter top layer according to claim 1 blocks, it is characterised in that described
Backwashing water outlet one (10), backwashing water is respectively equipped with above first packing layer (6), the second packing layer (7) to go out
Mouth two (11).
3. the device that a kind of alleviation denitrification deep-bed filter top layer according to claim 1 blocks, it is characterised in that described
Even water distributor (9) is made up of classification water-distributing device, respectively by water inlet manifold, supervisor, branch pipe and the equally distributed cloth of water distributing pore
Hydrophone is constituted.
4. the device that a kind of alleviation denitrification deep-bed filter top layer according to claim 1 blocks, it is characterised in that described
First packing layer (6) is zeolite, and selection particle diameter is 7-8mm, density 2.0-2.4g/cm3。
5. the device that a kind of alleviation denitrification deep-bed filter top layer according to claim 1 blocks, it is characterised in that described
Second packing layer (7) is made up of quartz sand, selection particle diameter 2-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621119107.9U CN206266390U (en) | 2016-10-12 | 2016-10-12 | It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621119107.9U CN206266390U (en) | 2016-10-12 | 2016-10-12 | It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206266390U true CN206266390U (en) | 2017-06-20 |
Family
ID=59037435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621119107.9U Active CN206266390U (en) | 2016-10-12 | 2016-10-12 | It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206266390U (en) |
-
2016
- 2016-10-12 CN CN201621119107.9U patent/CN206266390U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106554077B (en) | It is a kind of to alleviate device and its operation method that denitrification deep-bed filter top layer is blocked | |
| CN205740689U (en) | A kind of vertical-type eco-filtration pond for sewage purification | |
| CN203043658U (en) | Fast filtering pond | |
| CN105366877A (en) | Sewage treatment device integrating coagulation, sedimentation and filtration | |
| CN113754197B (en) | Near-zero maintenance village and town drinking water integrated purification device and method for treating source water by applying same | |
| CN108128967A (en) | A kind of river water body dystopy comprehensive high-efficiency processing method and system | |
| CN101386451B (en) | Method for processing town sewage using composite vertical current artificial marshland and apparatus thereof | |
| CN204474419U (en) | The portable artificial swamp of a kind of sewage disposal | |
| CN203781979U (en) | Ecological water purifying device | |
| CN107162200A (en) | A kind of artificial wet land system for purifying the roof rain water containing laundrywastes | |
| CN204474420U (en) | A kind of periphery circulation type artificial swamp | |
| CN204369736U (en) | Samll cities and towns' integration Water feeding treatment device | |
| CN108658297A (en) | A kind of low-pressure membrane water technology based on fluid bed MCR | |
| CN203291633U (en) | Solid-liquid separating device for waste water suspended solids | |
| CN206266390U (en) | It is a kind of to alleviate the device that denitrification deep-bed filter top layer blocks | |
| CN208802966U (en) | A kind of waterworks water purification installation | |
| CN202671352U (en) | Integrated aerobic granule sludge dynamic membrane bio-reaction waste water treatment device | |
| CN103449665B (en) | A kind of polluted water land biogenic sediment filtering system for mud-water separation | |
| CN205347155U (en) | Landfill leachate removes flavor system | |
| CN102701437A (en) | Integrated aerobic granular sludge dynamic membrane bioreaction wastewater treatment device | |
| CN101665295A (en) | Water treatment device, water treatment system and water treatment method thereof | |
| CN208471656U (en) | A kind of catalytic oxidation type small-sized sewage treating system | |
| CN203845911U (en) | Multi-medium biological contact vertical composite underflow artificial wetland | |
| CN210620531U (en) | Garbage transfer station leachate membraneless integrated treatment system | |
| CN207811369U (en) | A kind of change flow velocity polluted-water ecological purification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |