CN209554988U - A kind of synchronous denitrification dephosphorizing device based on electrochemical method - Google Patents
A kind of synchronous denitrification dephosphorizing device based on electrochemical method Download PDFInfo
- Publication number
- CN209554988U CN209554988U CN201821756159.6U CN201821756159U CN209554988U CN 209554988 U CN209554988 U CN 209554988U CN 201821756159 U CN201821756159 U CN 201821756159U CN 209554988 U CN209554988 U CN 209554988U
- Authority
- CN
- China
- Prior art keywords
- level
- aerator
- anoxic pond
- pond
- device based
- 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
The utility model discloses a kind of synchronous denitrification dephosphorizing device based on electrochemical method, including level-one anoxic pond, aerobic tank, second level anoxic pond and sedimentation basin.Level-one anoxic pond, aerobic tank, second level anoxic pond and sedimentation basin are sequentially connected by overflow port.Level-one anoxic pond connects elevator pump, and the first aerator is arranged in bottom；The second aerator is arranged in aerobic bottom of pond portion, and air lift pipeline is connected between aerobic tank and level-one anoxic pond；Third aerator is arranged in second level anoxic bottom of pond portion, and electrolytic cell is arranged in top, metal electrode pair is installed in the electrolytic cell, metal electrode is to connection DC power supply；It precipitates bottom of pond portion and sludge pump is set, the return line of sludge pump is connected with level-one anoxic pond；First aerator, the second aerator and third aerator and air lift pipeline are all connected with blower.The device realizes synchronous high-efficiency denitrogenation dephosphorizing, and water outlet nitrogen and phosphorus indexes can reach the above standard of IV class water, while reduce the required occupied area of processing.
Description
Technical field
The invention belongs to a kind of technical field of sewage, and in particular to a kind of equipment of synchronous denitrification dephosphorizing
Background technique
With booming and Treatment process increasingly mature, the discharge of chemical oxygen demand of water body of Environmental Protection in China industry
Effective control is obtained.However the reduction of total carbon, total phosphorus is but at a problem new in waste water control, nitrogen phosphorus discharge beyond standards
Consequence the most serious is water eutrophication, and eutrophication will lead to Dissolved Oxygen in Water decline, and water body blacks smelly.Cause
This, it is more and more be intended to handle nitrogen, the technology of phosphorus is developed, but often there is answer processing unit more for this kind of technology
It is miscellaneous, additional organic carbon source strengthened denitrification is needed, the defect that the flocculants such as PAFC, PAC carry out dephosphorization need to be added.
The patent of Publication No. CN201210113435 discloses a kind of hypoxic-ischemic brain-damage that quartz sand filler is arranged,
Oxygenation facility is not set inside, it is 5~6 that carbon source control water inlet C/N ratio is added into water inlet, and reactor is made to have good denitrification depth
Denitrification ability；Meanwhile by before hypoxic-ischemic brain-damage backwashes, increase anaerobic phosphorus release section, make hypoxic-ischemic brain-damage anaerobism/
It is run in the alternate environment of anoxic, creates good growing environment for Denitrifying Phosphate Accumulating Organisms, be effectively enriched Denitrifying Phosphate Accumulating Organisms,
Make hypoxic-ischemic brain-damage while denitrification denitrogenation, there is the ability of synchronous dephosphorization.But the invention need to provide additional carbon
Denitrogenation is carried out, processing cost is on the one hand increased, on the other hand may cause secondary pollution.
The patent of Publication No. CN201510219316 discloses a kind of denitrogenation dephosphorizing sewage purification system, which uses
Lime stone purifies dephosphorization area, clinoptilolite denitrogenation area, modified pottery material purifying area and four part of volcanic rock purifying area as packed bed,
Successively sewage is purified, denitrogenation, dephosphorization is completed at the same time, removes removal organic polluter and mud-water separation, complete integrated purifying
Sewage, structure is simple, easy to operate good purification.But the invention is using physisorphtion, therefore the regeneration of filler
Process and the discarded release again for being likely to cause nitrogen phosphorus.
The patent of Publication No. CN201210113435 discloses a kind of denitrification dephosphorization system, the principle of work are as follows: tower
The Thiobacillus such as intracorporal thiobacillus denitrificans are with NO3- N is electron acceptor, completes denitrification reaction under anaerobic condition；Meanwhile iron plane flower
Zero-valent Iron can with the nitrate in water occur redox reaction, by NO3 -It is reduced to NO2 -、NH4 +、NH3 +、N2Etc. forms, from
And reduce the concentration of nitrate in water；Iron plane flower in filler, electrochemical corrosion and (or) biochemistry corrosion generate Fe2+/Fe3 +, with the phosphate radical in sewage from the slightly solubilities substances such as generation phosphoric acid molysite are combined, to realize the removal of phosphorus.But the invention
Tower-like filling-material structure be easy by its processing generate slightly solubility substance block, furthermore the denitrification system of foregoing invention be sulphur from
Denitrification is supported, flora may be generated H by the pollution of sulphur reducing bacteria2S gas, causes secondary pollution.
Summary of the invention
The object of the present invention is to provide a kind of devices of synchronous denitrification dephosphorizing, can be directly as separate unit in sewage
Nitrogen phosphorus removed, can also be loaded into other sewage treatment process.Occupied area of the present invention is small, treatment effeciency
It is high, to the basic no requirement (NR) of carbon source, can be used as a kind of alternative of traditional denitrification dephosphorization technique.
To achieve the above object, the present invention provides a kind of synchronous denitrification dephosphorizing device based on electrochemical method, including
Level-one anoxic pond, aerobic tank, second level anoxic pond and sedimentation basin, it is characterised in that the level-one anoxic pond, aerobic tank, second level lack
Oxygen pond and sedimentation basin are sequentially connected by overflow port；Level-one anoxic pond connects water inlet of the elevator pump as device, and level-one lacks
The first aerator is arranged in oxygen tank bottom；The second aerator is arranged in aerobic bottom of pond portion, leads between aerobic tank and level-one anoxic pond
Air lift pipeline is crossed to be connected；Third aerator is arranged in second level anoxic bottom of pond portion, and top is arranged electrolytic cell, places in the electrolytic cell
It is immersed in second level anoxic pond liquid level metal electrode pair below；Metal electrode is separately connected the positive and negative of power supply to staggered relatively
Pole；It precipitates bottom of pond portion and sludge pump, the sludge pump connection mud line and return line, return line and level-one anoxic pond is set
It is connected；First aerator, the second aerator, third aerator and the air lift pipeline is all connected with blower.
In device, sewage is successively handled through level-one anoxic pond, aerobic tank, second level anoxic pond and sedimentation basin, is finally reached
Discharge standard.Elevator pump is used for sewage lifting to the bottom of level-one anoxic pond.First aerator be used for by activated sludge with
Sewage is sufficiently mixed.Second aerator is used to guarantee dissolved oxygen content while being sufficiently mixed activated sludge and sewage.Portion
Mixed liquor is divided to be back to level-one anoxic pond by air lift pipeline.Pass through metal electrode and hydrogen autotrophic denitrification bacterium in second level anoxic pond
N, P element in collective effect removal sewage.Scouring and sewage stirring of the third aerator for surface of metal electrode.Sludge
It is precipitated in sedimentation basin, partial sludge is back in level-one anoxic pond by sludge pump, and excess sludge is discharged.
Preferably, the material of metal electrode can be to include one of aluminium, magnesium, iron or a variety of alloys.
It is further preferred that the material of metal electrode is aluminium and its alloy.The electric conductivity of aluminium and ability resistant to chemical etching
It is more excellent compared with magnesium, iron.
It is further preferred that the material of metal electrode can be 1050,1060,5005,6061 type aluminium plates.The above-mentioned type
Plate is substantially free of the heavy metal element that copper, manganese etc. have toxic action to microorganism, and furthermore the above-mentioned type plate is cheap,
Plasticity is good.
Preferably, the electrode gross area=Q* (0.1~0.5) m2, Q is the discharge of sewage, and unit is ton/day.It is further excellent
Selection of land, the metal electrode gross area=Q*0.25m2.Electrode area is too small, can make sewage and electrode insufficient contact, causes to locate
Managing efficiency reduces；Electrode area is excessive, and system overall volume can be made to increase.
Preferably, metal electrode centering, spacing is 10~40mm between metal electrode.It is further preferred that metal electrode
Between spacing be 15mm, electrode spacing crosses conference and resistance caused to increase, and too small meeting of electrode spacing is so that the mass transfer reacted is affected.
Preferably, the third aerator of second level anoxic pond is located at immediately below electrolytic cell.
Preferably, the first aerator and/or third aerator are boring aeration pipe.
Preferably, the second aerator is microporous aeration disc.
Preferably, elevator pump is set in conditioning tank or preliminary processes pond.
Preferably, power supply is DC power supply, to realize electrolysis.
Preferably, metal electrode can be adjusted according to the actual situation to be one or more pairs of.
Synchronous denitrification dephosphorizing system provided by the invention has the advantage that compared with traditional denitrification dephosphorization apparatus
(1) by dephosphorization system in conjunction with nitrogen removal system, synchronous high-efficiency denitrogenation dephosphorizing is realized, water outlet nitrogen and phosphorus indexes can reach IV
The above standard of class water, while reducing the required occupied area of processing.
(2) hydrogen autotrophic denitrification is realized while being electrolysed dephosphorization, solves anti-nitration reaction for organic carbon source
It relies on.
(3) the method economical and efficient of dephosphorization avoids the organic-inorganics flocculant such as organic carbon source and PAM, PAFC and PAC
Use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the schematic diagram of apparatus of the present invention.
Appended drawing reference as shown in the figure is as follows:
1- conditioning tank or preliminary processes pond 2- elevator pump 3- synchronous denitrification dephosphorizing system
4- level-one anoxic pond 5- boring aeration pipe 6- aerobic tank
7- microporous aeration disc 8- second level anoxic pond 9- electrolytic cell
10- boring aeration pipe 11- sedimentation basin 12- sludge pump
13- blower 14- DC power supply
Specific embodiment
It is as shown in Figure 1 the embodiment of the invention.A kind of shown synchronous denitrification dephosphorizing based on electrochemical method
Device 3, including level-one anoxic pond 4, aerobic tank 6, second level anoxic pond 8 and sedimentation basin 11, level-one anoxic pond 4, aerobic tank 6, two
Grade anoxic pond 8 and sedimentation basin 11 are sequentially connected by overflow port.Level-one anoxic pond 4 connects elevator pump 2, the water inlet as device
Mouthful, boring aeration pipe 5 is arranged in bottom；Microporous aeration disc 7 is arranged in 6 bottom of aerobic tank, connects between aerobic tank 6 and level-one anoxic pond 4
Connect air lift pipeline；Boring aeration pipe 10 is arranged in second level anoxic bottom of pond portion 8, and electrolytic cell 9, installation in the electrolytic cell 9 is arranged in top
Aluminium electrode pair, aluminium electrode is to the positive and negative anodes for being separately connected DC power supply 14.In order to guarantee that electrolysis is normally carried out, aluminium electrode should soak
Not below 8 liquid level of second level anoxic pond.Sludge pump 12 is arranged in sedimentation basin 11, bottom, and sludge pump 12 connects mud line and reflux
Pipeline, return line are connected with level-one anoxic pond, and sludge is carried out outlet by mud line.Boring aeration pipe 5,10, micro-pore aeration
Disk 7 and air lift pipeline are all connected with blower 13, carry out air-blowing by blower 13.
Its operation mainly includes the following steps:
(1) elevator pump by sewage lifting from conditioning tank or preliminary processes 1 to the bottom of level-one anoxic pond, boring aeration pipe into
Row aeration, activated sludge and sewage are sufficiently mixed.
(2) sewage enters aerobic tank by the rear wall top overflow port of level-one anoxic pond, and microporous aeration disc is aerated, will
Activated sludge and sewage guarantee dissolved oxygen content while being sufficiently mixed；Part mixed liquor is back to level-one by air lift pipeline and lacks
Oxygen pond.
(3) sewage enters second level anoxic pond by the rear wall lower part overflow port of aerobic tank, and DC power supply is started to work, to electricity
Aluminium flake in solution slot is electrolysed and periodically switches positive and negative anodes；Boring aeration pipe is aerated simultaneously, is cleaned simultaneously to electrode
Sewage is stirred.
(4) sewage enters sedimentation basin by the overflow port in the middle part of second level anoxic pond rear wall, and sludge is sunk in sedimentation basin
It forms sediment；Partial sludge is back in level-one anoxic pond by sludge pump, and excess sludge is discharged.It repeats the above steps.
Spatially substep carries out for step (1), (2), (3), (4), synchronous in time to carry out.
As shown in Fig. 2, the principle is as follows: the anaerobic bacteria in level-one anoxic pond resolves into the larger molecular organics in sewage
Small organic molecule.The further decomposing organic matter of aerobic bacteria in aerobic tank provides inorganic carbon source, nitrobacteria for subsequent reactions
Ammonia nitrogen is nitrified:Cell reaction, sun occur for aluminium electrode in second level anoxic pond
Pole electrolysis generates aluminium ion, and cathode generates hydrogen: The Al that anode generates3+With it is molten
Phosphate radical in solution, which reacts, realizes the removing of phosphorus:The hydrogen that cathode generates is anti-by hydrogen autotrophy
Nitrifier utilizes the removing for realizing nitrogen:
The device is applicable in the total phosphorus concentration C of processing sewageTPi=0.5~30mg/L, total nitrogen concentration CTNi=10~60 mg/
L.Its treated total phosphorus concentration CTPo< 0.3mg/L, total nitrogen concentration CTNo<1.5mg/L。
Sewage is 1:(1.5~3 in the residence time ratio of the level-one anoxic pond, aerobic tank and second level anoxic pond):
(0.5~2).Preferably, level-one anoxic pond, aerobic tank, second level anoxic pond residence time ratio be 1:3:1.Level-one anoxic pond mistake
The short residence time can make high concentration total nitrogen removal effect bad, and the too long residence time can make to increase system footprint area.It is good
The oxygen pond too short residence time can make COD and ammonia nitrogen removal not up to standard, influence subsequent total nitrogen removal, too long stops
Stay the time that can make sludge age aging.The second level anoxic pond too short residence time can make total phosphorus and low concentration total nitrogen removal effect not
Good, the too long residence time can make to increase system footprint area.
Second level anoxic pond boring aeration pipe is 20~50 m relative to the blow rate of the metal electrode unit area3/
(h*m2).Preferably, the scouring air quantity of second level anoxic pond boring aeration pipe electrode projected area is 30m3/(h m2), aeration quantity mistake
Low to play scrubbing action, aeration quantity is excessively high to will lead to the rising of dissolved oxygen in anoxic tank amount.
Dissolved oxygen concentration is 0~0.5mg/L in level-one anoxic pond；It is 2~6mg/L that dissolved oxygen is dense in aerobic tank；Second level lacks
Dissolved oxygen concentration is 0~0.5mg/L in oxygen pond.
1.8~3.5V of operating voltage of DC power supply；Operating current I=Q*CTNi* (0.8~0.12) A, A indicate unit peace
Training.Preferably, the operating voltage of the DC power supply is 3V, and low voltage will lead to electrolytic efficiency reduction, and voltage is higher, can add
Fast electrode surface passivation reaction；Operating current I=Q*CTNi* (0.1) A, electric current is relatively low to be will lead to total nitrogen processing and is not thorough, electric current
It is higher, it will cause the loss aggravation of aluminium electrode.
DC power supply can periodically switch positive and negative anodes；Its positive and negative anodes switching frequency f=(0.5~2) * S/I, S are electrode plate
Work area.Preferably, positive and negative anodes switching frequency f=(1.5) * S/I of DC power supply.Switching frequency is relatively low to be easy to cause electrode
Passivation, the excessively high easy loss DC power supply of switching frequency.
The following are the electrochemistry synchronous denitrification dephosphorizing test results of above-mentioned apparatus.
Embodiment 1
Discharge of sewage Q=100t/d, total phosphorus concentration CTP=6mg/L, total nitrogen concentration CTN=40mg/L.Level-one anoxic pond
Residence time is 2h, and the residence time of the aerobic tank is 5h, and the residence time of second level anoxic pond is 1h；The electrode gross area is
36m2, operating current 350A；Return current ratio of the mixed liquid is 300.It is discharged total phosphorus concentration C after processingTP≤ 0.5mg/L, total nitrogen are dense
Degree≤15mg/L.
Embodiment 2
Discharge of sewage Q=20t/d, total phosphorus concentration CTP=5mg/L, total nitrogen concentration CTN=60mg/L.Level-one anoxic pond is stopped
Staying the time is 3h, and the residence time of the aerobic tank is 8h, and the residence time of second level anoxic pond is 2h；The electrode gross area is 8m2,
Operating current is 100A；Return current ratio of the mixed liquid is 250.It is discharged total phosphorus concentration C after processingTP≤ 0.3mg/L, total nitrogen concentration≤
10mg/L。
Embodiment 3
Discharge of sewage Q=40t/d, total phosphorus concentration CTP=5mg/L, total nitrogen concentration CTN=20mg/L.Level-one anoxic pond is stopped
Staying the time is 2h, and the residence time of the aerobic tank is 3h, and the residence time of second level anoxic pond is 1h；The electrode gross area is
16m2, operating current 80A；Return current ratio of the mixed liquid is 100.It is discharged total phosphorus concentration C after processingTP≤ 0.5mg/L, total nitrogen concentration
≤8mg/L。
Above-mentioned embodiment is only a preferred solution of the present invention, so it is not intended to limiting the invention.Have
The those of ordinary skill for closing technical field can also make various changes without departing from the spirit and scope of the present invention
Change and modification.Therefore all mode technical solutions obtained for taking equivalent substitution or equivalent transformation, all fall within guarantor of the invention
It protects in range.
Claims (10)
1. a kind of synchronous denitrification dephosphorizing device based on electrochemical method, which is characterized in that including level-one anoxic pond, aerobic tank,
Second level anoxic pond and sedimentation basin, it is characterised in that the level-one anoxic pond, aerobic tank, second level anoxic pond and sedimentation basin pass through
Overflow port is sequentially connected；Level-one anoxic pond connects water inlet of the elevator pump as device, and level-one anoxic bottom of pond portion setting first exposes
Device of air；The second aerator is arranged in aerobic bottom of pond portion, is connected between aerobic tank and level-one anoxic pond by air lift pipeline；Second level
Third aerator is arranged in anoxic bottom of pond portion, and top is arranged electrolytic cell, places in the electrolytic cell and be immersed in second level anoxic pond liquid
Face metal electrode pair below；Metal electrode is to positive and negative anodes staggered relatively, and being separately connected power supply；It is dirty to precipitate bottom of pond portion setting
Dredge pump, the sludge pump connection mud line and return line, return line are connected with level-one anoxic pond；First aeration
Device, the second aerator, third aerator and air lift pipeline are all connected with blower.
2. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
The material of metal electrode is one of aluminium, magnesium, iron, or by a variety of alloys formed.
3. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
The electrode gross area=Q* (0.1~0.5) m2, Q is the discharge of sewage, and unit is ton/day.
4. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
Metal electrode centering, metal electrode spacing are 10~40mm.
5. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
The third aerator of second level anoxic pond is located at immediately below electrolytic cell.
6. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
The first aerator and/or third aerator be boring aeration pipe.
7. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
The second aerator be microporous aeration disc.
8. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
Elevator pump be set in conditioning tank or preliminary processes pond.
9. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that described
Power supply be DC power supply.
10. a kind of synchronous denitrification dephosphorizing device based on electrochemical method according to claim 1, which is characterized in that institute
The metal electrode stated is to being one or more pairs of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756159.6U CN209554988U (en) | 2018-10-29 | 2018-10-29 | A kind of synchronous denitrification dephosphorizing device based on electrochemical method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821756159.6U CN209554988U (en) | 2018-10-29 | 2018-10-29 | A kind of synchronous denitrification dephosphorizing device based on electrochemical method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209554988U true CN209554988U (en) | 2019-10-29 |
Family
ID=68300077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821756159.6U Active CN209554988U (en) | 2018-10-29 | 2018-10-29 | A kind of synchronous denitrification dephosphorizing device based on electrochemical method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209554988U (en) |
-
2018
- 2018-10-29 CN CN201821756159.6U patent/CN209554988U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101624250B (en) | Anaerobic zero-valent iron sewage treatment method | |
| WO2008052413A1 (en) | A deeply sewage treating method and apparatus without sludge discharging | |
| CN105481208B (en) | A kind of high-efficiency sewage treatment process and device based on electron stream orientation regulation and control | |
| US11884569B2 (en) | System for biological nitrogen removal and negative carbon discharge from wastewater with low carbon-to-nitrogen ratio | |
| CN105668717A (en) | Magnesium ammonium phosphate-electrooxidation integrated device and simultaneous nitrogen and phosphorus removing method thereof | |
| CN109336328B (en) | Bioelectrochemical synchronous denitrification and dephosphorization device and method thereof | |
| CN112520838A (en) | Waste water and waste gas combined treatment system for efficient decarbonization and denitrification | |
| CN203319806U (en) | Electrolysis dephosphorization device for treating domestic sewage | |
| CN105600930B (en) | Denitrogenation dephosphorizing produces electricity device | |
| CN108911355B (en) | Landfill leachate MBR effluent treatment method and system | |
| CN104860397A (en) | Electrochemical-biological fluidized bed reactor and wastewater treatment method | |
| CN110642478A (en) | Coupled treatment system and method for coking phenol-cyanogen wastewater by biochemical method and physicochemical method | |
| CN113045115A (en) | Landfill leachate treatment method based on electrocatalytic oxidation coupled biochemistry | |
| CN108996810B (en) | High-concentration degradation-resistant organic wastewater zero discharge system and treatment method | |
| CN109231673B (en) | A/O combined micro-electric field-Fe/C reinforced dephosphorization device and application thereof | |
| CN105984991B (en) | A kind of sewerage advanced treatment process | |
| CN209554988U (en) | A kind of synchronous denitrification dephosphorizing device based on electrochemical method | |
| CN206255960U (en) | A kind of city domestic sewage processing system | |
| CN217103411U (en) | Mobile photoelectric complementary sewage deep purification system | |
| CN213357071U (en) | System for realizing short-cut nitrification-anaerobic ammonia oxidation denitrification stable operation of low-ammonia-nitrogen wastewater | |
| CN210261261U (en) | Efficient nitrogen and phosphorus removal system for treating aquaculture tail water | |
| CN204737787U (en) | Electrochemistry - biological fluidized bed reactor | |
| CN210048616U (en) | Plasma sewage purification device | |
| CN113292184A (en) | Mobile photoelectric complementary sewage deep purification system and method | |
| CN101402502B (en) | Treatment method and apparatus for mifepristone wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |