CN107758866A - One kind realizes AAO BCO technique deep denitrifications dephosphorization and resource recovering system and method - Google Patents
One kind realizes AAO BCO technique deep denitrifications dephosphorization and resource recovering system and method Download PDFInfo
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- CN107758866A CN107758866A CN201711247511.3A CN201711247511A CN107758866A CN 107758866 A CN107758866 A CN 107758866A CN 201711247511 A CN201711247511 A CN 201711247511A CN 107758866 A CN107758866 A CN 107758866A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
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Abstract
The invention discloses one kind to realize AAO BCO technique deep denitrifications dephosphorization and resource recovering system and method,Including by raw water water tank,Intake pump,AAO reactors,Intermediate sedimentation pond,Intermediate water tank,Middle intake pump,Biological contact oxidation pond and settling zone are linked in sequence into AAO-BCO systems,Wherein,The discharge pipeline in intermediate sedimentation bottom of pond portion and the bottom of settling zone are connected by mud valve I and mud valve II with storage mud tank respectively,Store up mud tank successively with fermentation tank,Recovery of nitrogen and phosphorus tank is connected with liquid reserve tank,It is connected at the top of fermentation tank by elevator pump II with alkali lye dosing tank,Fermenter base is provided with mud valve IV,Recovery of nitrogen and phosphorus tank top is connected by elevator pump I with magnesium salt solution dosing tank,Recovery of nitrogen and phosphorus pot bottom is provided with mud valve III,Liquid reserve tank is connected by elevator pump III with raw water water tank,The present invention is realized in the case of low C/N sewage,The advanced nitrogen dephosphorization of AAO BCO techniques and the recycling of sludge.
Description
Technical field
The present invention relates to belonging to and technical field of sewage, more particularly to one kind realizes AAO-BCO technique deep denitrifications
Dephosphorization and resource recovering system and method.
Background technology
At present, municipal wastewater treatment plant both domestic and external carries out denitrogenation dephosphorizing processing using bioanalysis more.It is available molten in raw water
The content of solution property organic matter, especially short chain fatty acids significantly affects for Microbial denitrogenation phosphor-removing effect.When water inlet
When organic concentration is relatively low, the amount of short chain fatty acids is difficult to the needs for meeting denitrifying bacterium and dephosphorization bacterial.The municipal sewage in China
C/N of intaking is generally relatively low, is unfavorable for the operation of denitrification dephosphorization technique, it usually needs additional carbon such as acetic acid etc..If it can utilize
Organic acid caused by sewage plant original position, i.e., fermented using excess sludge and produce short chain fatty acids as denitrification dephosphorization technique
Additional carbon, then can not only reduce surplus sludge volume, and by carrying out recycling to it, save and add outer carbon
Source expense, while the Nitrogen/Phosphorus Removal of sewage plant is improved, reduce the pollution to water environment.
Research shows that sludge is easier to hydrolyze under alkalescence condition, the dissolved organic matter of sludge liquid phase（SCOD）It is quick to increase
Add, the high-molecular compound such as protein, carbohydrate, fat is converted into the small molecular organic acids such as acetic acid, propionic acid, butyric acid.This
A little SCOD are the substrates that microorganism easily absorbs in biological carbon and phosphorous removal system, can be preferably by denitrifying bacterium and dephosphorization bacterial profit
With.But sludge fermentation process carbon source also releases substantial amounts of nitrogen phosphorus, how to cause this part high concentration while dissolution
It is most important that nitrogen phosphorus does not influence subsequently using for carbon source.
AAO-BCO techniques are combined using activated sludge and biomembrane, are solved competing between each flora in traditional handicraft
Striving property contradiction, double sludge systems based on denitrification dephosphorization are realized, denitrification phosphorus-collecting is beneficial to especially under the conditions of low C/N
Bacterium（DPAOs）As dominant bacteria, but carbon source still limits the effect of denitrogenation dephosphorizing in the technique.
The content of the invention
The invention provides one kind to realize the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, to AAO-BCO systems
The discharged sludge of system carries out alkaline fermentation, and reclaims the nitrogen phosphorus in zymotic fluid by guanite, then by the supernatant after processing
As the supplementary carbon source of raw water, in the case of realizing low C/N sewage, the advanced nitrogen dephosphorization of AAO-BCO techniques and the resource of sludge
Change and utilize.
In order to solve the above problems, the technical solution adopted in the present invention is such, and one kind realizes AAO-BCO techniques depth
Spend denitrogenation dephosphorizing and resource recovering system, it is characterised in that including AAO-BCO systems, described AAO-BCO systems are by raw water
Water tank, intake pump, AAO reactors, intermediate sedimentation pond, intermediate water tank, middle intake pump, biological contact oxidation pond and settling zone
It is linked in sequence and forms, described intermediate sedimentation bottom of pond portion is connected with discharge pipeline and mud return line, the discharge pipeline in intermediate sedimentation pond
It is connected respectively by mud valve I and mud valve II with storage mud tank with the bottom of settling zone, storage mud tank returns with fermentation tank, nitrogen phosphorus successively
Closed cans is connected with liquid reserve tank, is connected at the top of fermentation tank by elevator pump II with alkali lye dosing tank, fermenter base is provided with spoil disposal
Valve IV, recovery of nitrogen and phosphorus tank top are connected by elevator pump I with magnesium salt solution dosing tank, and recovery of nitrogen and phosphorus pot bottom is provided with spoil disposal
Valve III, liquid reserve tank are connected by elevator pump III with raw water water tank.
Wherein, described AAO reactors include the anaerobic zone, anoxic zone and aerobic zone according to water inlet order arrangement connection.
Described settling zone top is provided with overfall, and bottom is sloping plate deposition district.
The overfall of described settling zone is connected with going out water tank, goes out water tank and is reacted by nitrification liquid reflux pump and AAO
The anoxic zone of device is connected.
Agitator is provided with the anaerobic zone and anoxic zone of AAO reactors.
The mud return line in described intermediate sedimentation pond is connected by reflux pump with the anaerobic zone bottom of AAO reactors.
The aerobic zone and biological contact oxidation pond bottom of described AAO reactors are provided with aeration head, each aeration head
It is connected by correspondingly aeration tube with air blower, flowmeter is provided with every aeration tube.
Floating stuffing is provided with described biological contact oxidation pond.
Agitating device I is provided with described recovery of nitrogen and phosphorus tank.
Agitating device II is provided with described fermentation tank.
The present invention also provides a kind of side that the dephosphorization of AAO-BCO technique deep denitrifications and resource reclaim are realized using said system
Method, comprise the following steps：
1）In raw water water tank, after raw water mixes with the fermented supernatant fluid from liquid reserve tank, sent through intake pump and sludge reflux pump
Returned sludge enter AAO reactor denitrogenation dephosphorizings together；
2）Mixed liquor through AAO reactor denitrogenation dephosphorizings enters intermediate sedimentation pond, carries out mud-water separation, and supernatant connects into biology
Touch oxidation pond and complete NH4 +Oxidation；
3）Settling zone is subsequently entered, the bottom discharge of the biomembrane oil sloping plate deposition district to come off after precipitation；
4）At the same time, the precipitating sludge part in intermediate sedimentation pond is back to AAO reactors, another part through sludge reflux pump
Excess sludge enters storage mud tank by mud valve II together with the biomembrane that comes off that mud valve I is sent, and subsequently enters fermentation tank；
5）Alkali lye in alkali lye dosing tank II is added into fermentation tank by elevator pump II, in the presence of stirring, sludge and alkali
Liquid mixes, and recovery of nitrogen and phosphorus tank is entered after fermentation, excess sludge is discharged by mud valve IV, while adds equivalent to fermentation system again
Fresh sludge；
6）By elevator pump I by dosing tank I built with MgCl2Solution is added the NH in zymotic fluid into recovery of nitrogen and phosphorus tank4 +、
PO4 3-Reclaimed in the form of guanite precipitates by mud valve III；
7）Zymotic fluid through recovery of nitrogen and phosphorus tank removing nitrogen phosphorus enters liquid reserve tank, and the boosted pump III of fermented supernatant fluid after precipitation is returned
To raw water water tank.
Preferably, step 1）In, AAO reactors are introduced into together with the returned sludge that sludge reflux pump is sent through intake pump
Anaerobic zone, return sludge ratio 100-200%, sludge concentration is 4000 ~ 5000mg/L, -2h of anaerobic reaction time 1.2；
The anoxic zone of AAO reactors is proceeded immediately to, while enters also having for AAO reactors anoxic zone and is aoxidized through biological contact oxidation pond
Nitrification liquid again through sedimentation basin separation of solid and liquid afterwards, mixed liquid recycle ratio 300%, hypoxia response time are 6.0-8h；Subsequently enter
The aerobic zone of AAO reactors, dissolved oxygen are controlled in 3.0 ~ 4.0mg/L.
Preferably, step 2）In, 1.5 ~ 2.0h of effective hydraulic detention time in biological contact oxidation pond.
Preferably, step 3）In, the nitrification liquid part after settling zone precipitates enters lacking for AAO reactors through reflux pump
Oxygen area, another part directly discharge.
Preferably, step 4）In, the precipitating sludge part in intermediate sedimentation pond is back to AAO reactors through sludge reflux pump
Anaerobic zone.
Preferably, step 5）In, it is 9-11 to control pH in fermentation tank, and mean sludge concentration is 10000-2000 mg/L, dirty
The mud residence time is 5~10d, spoil disposal ratio is 0.1~0.2.
Preferably, step 6）In, it is 9 ~ 11 to control recovery of nitrogen and phosphorus tank pH, and speed of agitator is 120 ~ 150 r/min, instead
It is 30 ~ 50min between seasonable, the sedimentation time is 20 ~ 30min.
In AAO reactors, sanitary sewage first carries out anaerobic reaction, and then the nitrification liquid with biological contact oxidation pond nitrification mixes
The denitrification dephosphorization reaction carried out under anoxia condition is closed, then after Aerobic Process for Treatment, is separated by intermediate sedimentation pond, obtains supernatant respectively
Liquid and sludge；Above-mentioned supernatant is placed in the biological contact oxidation pond with floating stuffing, nitrification is completed under aerobic condition
Enter settling zone after reaction, obtain nitrification liquid and sludge respectively；What the sludge and settling zone that the separation of intermediate sedimentation pond obtains obtained
Sludge obtains zymotic fluid through alkaline fermentation, then obtains fermented liquid supernatant liquid after reclaiming nitrogen phosphorus in the form of guanite, then by zymotic fluid
Supernatant enters the anaerobic zone of AAO reactors after being mixed with sanitary sewage.
Beneficial effect：
1）C/N is low, and denitrogenation dephosphorizing efficiency is unstable, and sludge yield is big for being intake in current sewage disposal by the present invention, runs energy
Consume the problems such as high, sludge fermentation and denitrification dephosphorization coupled, not only realize minimizing and the recycling of sludge, at the same break away from because
Carbon source shortage causes the low C/N predicaments lower than wastewater treatment efficiency.
2）The present invention solves contradiction, Denitrifying Phosphorus Removal saving carbon source, reduction exposure between length sludge age in traditional handicraft
Tolerance, sludge yield is reduced, the synchronous raising of denitrogenation dephosphorizing efficiency can be achieved.
3）Liquid reserve tank is connected with raw water water tank in the present invention so that supplementary carbon source of the sludge fermentation liquid as raw water, by dirt
Mud is reduced and internal carbon source exploitation is combined, and improves system treatment effeciency, reduces operating cost.
4）The present invention is simple to operate, and management is convenient, except that can realize subtracting for the system excess sludge and the biomembrane that comes off
Amount, the excess sludge of other techniques can also be handled.
5）The present invention realizes recovery of nitrogen and phosphorus and not only alleviates sludge treatment problem, and reduces Treatment of Sludge expense,
Sewage disposal is mutually unified with recycling sludge utilization.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
In Fig. 1：1- raw water water tanks；2- intake pumps；3-AAO reactors；4- agitators；5- anaerobic zones；6- anoxic zones；7- is good
Oxygen area；8- aeration heads；9- flowmeters；10- intermediate sedimentations pond；11- intermediate water tanks；Intake pump among 12-；13- biological contact oxidations
Change pond；14- settling zones；15- floating stuffings；16- overfalls；17- goes out water tank；18- sloping plate deposition districts；19- nitrification liquids flow back
Pump；20- sludge reflux pumps；21- air blowers；22- mud valves I；23- mud valves II；24- stores up mud tank；25- fermentation tanks；26- nitrogen phosphorus
Recycling can；27- liquid reserve tanks；28- agitating devices I；29- elevator pumps I；30- magnesium salt solution dosing tanks；31- agitating devices II；32-
Elevator pump II；33- alkali lye dosing tanks；34- elevator pumps III；35- mud valves III；36- mud valves IV.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, should
Embodiment is only used for explaining the present invention, is not intended to limit the scope of the present invention..
Referring to Fig. 1, one kind realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, including AAO-BCO systems
System, described AAO-BCO systems by raw water water tank 1, intake pump 2, AAO reactors 3, intermediate sedimentation pond 10, intermediate water tank 11,
Middle intake pump 12, biological contact oxidation pond 13 and settling zone 14 are linked in sequence and formed.
Wherein, described AAO reactors 3 include the anaerobic zone 5, anoxic zone 6 and aerobic zone according to water inlet order arrangement connection
7, agitator 4 is provided with anaerobic zone 5 and anoxic zone 6；In the present embodiment, the L of AAO reactors dischargeable capacity 28, during anaerobic reaction
Between 1.2 h, anaerobic/anoxic/aerobic volumetric ratio be 1:5:1.
The aerobic zone 7 of AAO reactors 3 is connected with intermediate sedimentation pond 10, and water outlet enters intermediate water tank 11, middle intake pump 12
Connect biological contact oxidation pond 13.
The aerobic zone 7 and the bottom of biological contact oxidation pond 13 of AAO reactors 3 are equipped with aeration head 8, and each aeration head is logical
Cross correspondingly aeration tube with air blower 21 to be connected, flowmeter 9 is provided with every aeration tube.
Floating stuffing is filled with biological contact oxidation pond, the material of floating stuffing is polypropylene in the present embodiment, is hanged
Floating packing density is less than water, and specific surface area is 1000 ~ 1500 m2/m3, and porosity is more than 95%, and filling rate is 40 ~ 45%,
Main function is the oxidation for completing ammonia nitrogen.
Settling zone top is provided with overfall 16, and the overfall 16 of settling zone is connected with going out water tank 17, described water outlet water
Case 17 is connected by nitrification liquid reflux pump 19 with the anoxic zone 6 of AAO reactors 3, and electron acceptor is provided for Denitrifying Phosphorus Removal；
The bottom of settling zone is sloping plate deposition district 18, and the bottom of settling zone is connected by mud valve I with storage mud tank 24, the biology to come off
Film is discharged into storage mud tank 24 by mud valve I 22.
The bottom of intermediate sedimentation pond 10 is connected with discharge pipeline and mud return line, and the mud return line in intermediate sedimentation pond 10 passes through
Reflux pump is connected with the bottom of anaerobic zone 5 of AAO reactors 3, it is therefore an objective to the sludge concentration in maintenance reaction device, intermediate sedimentation pond 10
The discharge pipeline of bottom is connected by mud valve II 23 with storage mud tank 24, and excess sludge is then discharged into storage mud tank 24 by mud valve II.
Storage mud tank 24 is connected with fermentation tank 25, recovery of nitrogen and phosphorus tank 26 and liquid reserve tank 27 successively.Pass through mud valve II 23 and row
Slurry valve I 22 into the excess sludge for storing up mud tank 24 and the biomembrane that comes off, subsequently enters fermentation tank 25 together.
The top of fermentation tank 25 is connected by elevator pump II 32 with alkali lye dosing tank 33, and agitating device II is provided with fermentation tank
31, fermenter base is provided with mud valve IV 36, alkali lye dosing tank 33 built with NaOH solution pass through elevator pump II 32 and add
To fermentation tank 25, basicity is provided for fermentation tank 25, in the presence of agitating device II 31, sludge mixes with alkali lye, carries out alkali
Property fermentation, excess sludge pass through mud valve IV 36 discharge.
The top of recovery of nitrogen and phosphorus tank 26 is connected by elevator pump I 29 with magnesium salt solution dosing tank 30, is provided with phosphorus recycling can
Agitating device I 28, the bottom of recovery of nitrogen and phosphorus tank 26 are provided with mud valve 35, and the magnesium salt solution in magnesium salt solution dosing tank 30 is by carrying
Rise pump I 29 to add to recovery of nitrogen and phosphorus tank 26, magnesium chloride is added for recovery of nitrogen and phosphorus tank 26, will in the presence of agitating device I 28
NH4+, PO43- in zymotic fluid are reclaimed in the form of guanite by mud valve III 35.
Described liquid reserve tank 27 is connected by elevator pump III 34 with raw water water tank 1.The supernatant of removing nitrogen phosphorus enters liquid storage
Case 27, raw water water tank 1 is squeezed into through elevator pump III 34 after precipitation.
A kind of method that the dephosphorization of AAO-BCO technique deep denitrifications and resource reclaim are realized using said system, including it is following
Step：
1）In raw water water tank 1, after raw water mixes with the fermented supernatant fluid from liquid reserve tank 27, through intake pump 2 and sludge reflux pump
20 returned sludges sent enter AAO reactors 3 together（The L of dischargeable capacity 28, anaerobic/anoxic/aerobic volumetric ratio are 1:5:1）
Anaerobic zone 5, return sludge ratio 100%, sludge age SRT controls are sufficiently mixed reaction by agitating device 8, detest in 10 d or so
The h of oxygen reaction time 1.2, sludge concentration 4500mg/L；DPAOs is utilized in the easily biodegradable organicses synthesis in raw water and zymotic fluid
Carbon source（PHAs）It is stored in cell body, most of organic matter is removed, while discharges phosphorus；
2）Anoxic zone 6 is proceeded immediately to, while what is entered also has the nitrification liquid that separation of solid and liquid is completed through biological contact oxidation pond 13,
Mixed liquid recycle ratio 300%, the h of hypoxia response time 6.0；During plug-flow, DPAOs is with NO3 -- N is final electron acceptor, with
PHAs is electron donor, the synchronous denitrification dephosphorizing in a manner of " carbon is dual-purpose "；
3）Aerobic zone 7 is subsequently entered, dissolved oxygen is controlled in 3.0 ~ 4.0mg/L, and main function is further to inhale phosphorus, while stripping
N caused by denitrification process2, it is easy to mud-water separation；
4）Mixed liquor carries out mud-water separation, the h of sedimentation time 2.5 in intermediate sedimentation pond 10, and supernatant enters biological contact oxidation pond
13 (L of dischargeable capacity 12) complete NH4 +Oxidation, dissolved oxygen control in 2.0 mg/L, effective hydraulic detention time 2.0h；
5）Settling zone 14 is subsequently entered, supernatant enters water tank 17 through overfall 16, and a part of water outlet flows back through nitrification liquid
Pump 19 enters the anoxic zone 6 of AAO reactors 3, provides electron acceptor for denitrification dephosphorization, another part directly discharges；Come off
Biomembrane is discharged in the bottom of sloping plate deposition district 18.
6）At the same time, the precipitating sludge part in intermediate sedimentation pond 10 is back to AAO reactors 3 through sludge reflux pump 20
Anaerobic zone 5, another part excess sludge by mud valve II 23 together with the biomembrane that comes off that mud valve I 22 is sent enter store up
Mud tank 24, subsequently enter fermentation tank 25；
7）Subsequently enter fermentation tank 25（The L of dischargeable capacity 10）, NaOH solution of the alkali lye dosing tank II 33 equipped with 1mol/L, pass through
Elevator pump II 32 is added into fermentation tank 25, and basicity is provided for fermentation process, in the presence of agitating device II 31, sludge
Mixed with alkali lye, it is 10 to control pH+0.2, mean sludge concentration is 10000 mg/L, and spoil disposal ratio is 0.2, and sludge retention time is
5 d, zymotic fluid enter recovery of nitrogen and phosphorus tank 26, and excess sludge is discharged by mud valve IV 36, while is added again to fermentation system
The fresh sludge of amount.
8）Dosing tank I 30 is equipped with 2mol/L MgCl2Solution, added into recovery of nitrogen and phosphorus tank 26, controlled by elevator pump I 29
PH processed is 10+0.5, the speed of agitator of agitating device I 28 is 120 r/min, and the reaction time is 30 min；Sedimentation time is
20min, by the NH in zymotic fluid4 +、PO4 3-Reclaimed in the form of guanite precipitates by mud valve III 35.
9）The zymotic fluid of removing nitrogen phosphorus enters liquid reserve tank 27, and dissolved organic matter SCOD is at concentrations up to 6000mg/L, precipitation
Boosted pump III 34 squeezes into raw water water tank 1 to fermented supernatant fluid afterwards according to a certain ratio, reaches the purpose for improving water inlet C/N.
Under aforesaid operations step and service condition, average water outlet COD, NH of system during experiment4 +-N、NO3 --N、TN、TP
Deng respectively 38.5,0.31,10.72,11.15,0.28 mg/L, each effluent index of the above is superior to one-level emission standard A.Nitrogen
Phosphorus recovery system NH4 +-N、PO4 3-- P clearance is respectively 75.8% and 84.7%, and the main component of sediment is guanite.
Above content is to combine the further description that specific experiment embodiment is done to the present invention, is easy to the neck
Field technique personnel are better understood from and using the present invention, it is impossible to think that the embodiment of the present invention is only limited to these, therefore
The simple modifications that art personnel are done to the present invention are all within the scope of the present invention.
Claims (10)
1. one kind realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, it is characterised in that is including AAO-BCO
System, described AAO-BCO systems are by raw water water tank, intake pump, AAO reactors, intermediate sedimentation pond, intermediate water tank, middle water inlet
Pump, biological contact oxidation pond and settling zone, which are linked in sequence, to be formed, and described intermediate sedimentation bottom of pond portion is connected with discharge pipeline and dirt
Mud return duct, the discharge pipeline in intermediate sedimentation pond and the bottom of settling zone are respectively by mud valve I and mud valve II with storing up mud tank phase
Even, storage mud tank is connected with fermentation tank, recovery of nitrogen and phosphorus tank and liquid reserve tank successively, passes through elevator pump II and alkali lye dosing at the top of fermentation tank
Case is connected, and fermenter base is provided with mud valve IV, and recovery of nitrogen and phosphorus tank top passes through elevator pump I and magnesium salt solution dosing tank phase
Even, recovery of nitrogen and phosphorus pot bottom is provided with mud valve III, and liquid reserve tank is connected by elevator pump III with raw water water tank.
2. one kind according to claim 1 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, described AAO reactors include the anaerobic zone, anoxic zone and aerobic zone according to water inlet order arrangement connection.
3. one kind according to claim 2 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, the mud return line in described intermediate sedimentation pond is connected by reflux pump with the anaerobic zone bottom of AAO reactors.
4. one kind according to claim 2 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, described settling zone top is provided with overfall, and the bottom of settling zone is sloping plate deposition district.
5. one kind according to claim 4 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, the overfall of described settling zone is connected with going out water tank, and described to go out water tank anti-by nitrification liquid reflux pump and AAO
The anoxic zone of device is answered to be connected.
6. one kind according to claim 1 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, floating stuffing, the m of specific surface area 1000 ~ 1500 is provided with described biological contact oxidation pond2/m3, porosity is more than
95%, filling rate is 40 ~ 45%.
7. one kind according to claim 1 realizes the dephosphorization of AAO-BCO technique deep denitrifications and resource recovering system, its feature
It is, is set in described recovery of nitrogen and phosphorus tank and fermentation tank and be respectively arranged with agitating device I and agitating device II.
8. realize the dephosphorization of AAO-BCO technique deep denitrifications and resource using the system described in claim 1-7 any claims
The method of recovery；
1）In raw water water tank, after raw water mixes with the fermented supernatant fluid from liquid reserve tank, sent through intake pump and sludge reflux pump
Returned sludge enter AAO reactor denitrogenation dephosphorizings together；
2）Mixed liquor through AAO reactor denitrogenation dephosphorizings enters intermediate sedimentation pond, carries out mud-water separation, and supernatant connects into biology
Touch oxidation pond and complete NH4 +Oxidation；
3）Settling zone is subsequently entered, the bottom discharge of the biomembrane oil sloping plate deposition district to be come off after precipitation；
4）At the same time, the precipitating sludge part in intermediate sedimentation pond is back to AAO reactors, another part through sludge reflux pump
Excess sludge enters storage mud tank by mud valve II together with the biomembrane that comes off that mud valve I is sent, and subsequently enters fermentation tank；
5）Alkali lye in alkali lye dosing tank II is added into fermentation tank by elevator pump II, in the presence of stirring, sludge and alkali
Liquid mixes, and recovery of nitrogen and phosphorus tank is entered after fermentation, excess sludge is discharged by mud valve IV, while adds equivalent to fermentation system again
Fresh sludge；
6）By elevator pump I by dosing tank I built with MgCl2Solution is added the NH in zymotic fluid into recovery of nitrogen and phosphorus tank4 +、
PO4 3-Reclaimed in the form of guanite precipitates by mud valve III；
7）Zymotic fluid through recovery of nitrogen and phosphorus tank removing nitrogen phosphorus enters liquid reserve tank, and the boosted pump III of fermented supernatant fluid after precipitation is beaten
It is back to raw water water tank.
9. the method according to claim 8 for realizing the dephosphorization of AAO-BCO technique deep denitrifications and resource reclaim, its feature exist
In step 5）In, it is 9-11 to control pH in fermentation tank, and mean sludge concentration is 10000-2000 mg/L, and sludge retention time is
5~10d, spoil disposal ratio is 0.1~0.2.
10. the method according to claim 8 for realizing the dephosphorization of AAO-BCO technique deep denitrifications and resource reclaim, its feature
It is, step 6）In, it is 9 ~ 11 to control recovery of nitrogen and phosphorus tank pH, and speed of agitator is 120 ~ 150 r/min, the reaction time 30
~ 50min, sedimentation time are 20 ~ 30min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711247511.3A CN107758866A (en) | 2017-12-01 | 2017-12-01 | One kind realizes AAO BCO technique deep denitrifications dephosphorization and resource recovering system and method |
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|---|---|---|---|
| CN201711247511.3A CN107758866A (en) | 2017-12-01 | 2017-12-01 | One kind realizes AAO BCO technique deep denitrifications dephosphorization and resource recovering system and method |
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| CN107758866A true CN107758866A (en) | 2018-03-06 |
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