CN109231478A - A kind of starting method of full biological phosphate-eliminating AOO technique - Google Patents

A kind of starting method of full biological phosphate-eliminating AOO technique Download PDF

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CN109231478A
CN109231478A CN201811025255.8A CN201811025255A CN109231478A CN 109231478 A CN109231478 A CN 109231478A CN 201811025255 A CN201811025255 A CN 201811025255A CN 109231478 A CN109231478 A CN 109231478A
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sludge
aerobic
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CN109231478B (en
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许达
张浩宾
王川
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Jiangsu Wuzhang Biotechnology Co Ltd
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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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • 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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  • Biodiversity & Conservation Biology (AREA)
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  • Hydrology & Water Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
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  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention provides a kind of starting methods of full biological phosphate-eliminating AOO technique, comprising the following steps: step 1: the domestication concentration stage before starting, comprising: (1) sludge anaerobic contact；(2) sludge aerobic height aeration domestication；(3) sludge quantity amplification and optimal aeration quantity find the stage；Step 2: startup stage: (1) entering reactor, anaerobism section, aerobic first section, aerobic middle section and aerobic latter end is respectively set in reactor, and anaerobism section hydraulic detention time is consistent with tradition AO technique；(2) in aerobic first section control dissolved oxygen concentration in 0.3~0.7mg/L, 0.7~1h of hydraulic detention time, aerobic middle section and latter end dissolved oxygen concentration are in 1.0~1.6mg/L, 1.5~2h of hydraulic detention time, sludge age is 5~7d, controls reflux ratio 50%~60%.The starting of this law system is quick, starting success rate is high, stable and saving aeration quantity.

Description

A kind of starting method of full biological phosphate-eliminating AOO technique
Technical field
The invention belongs to municipal sewage treatments and recycling field, are related to a kind of starting side of full biological phosphate-eliminating AOO technique Method.
Background technique
Nitrogen, phosphorus are the principal elements for causing lake eutrophication, the main target or COD of the current sewage treatment in China, The removal of nitrogen, phosphorus is paid attention to not enough, in cell actual domestic wastewater ammonia nitrogen concentration in 50~70mg/L, phosphorus concentration 6~ 7mg/L, the reasons such as COD is limited since nitrobacteria and aerobic polyP bacteria sludge age are different, in sewage, nitrogen, phosphorus removal cannot Enough take into account.Sewage plant generallys use biological denitrificaion, and dephosphorization is biology+chemistry auxiliary mode, this results in cost of sewage disposal Increase, and the chemical agent added activated sludge can be generated it is permanent influence, increase tenor in water outlet, subsequent chlorination Disinfection can generate unknown chemical substance again.
Beginning of the sixties late 1950s, srinath et al. observe work in the production run of sewage treatment plant Property sludge biological excess dephosphorization phenomenon, just understood fully needed for realizing biological phosphate-eliminating by the research work carried out the seventies Service condition, and be engineered consciously, productivity biological removal of phosphorus in wastewater engineering is designed and has built up, technique is that anaerobism is good Oxygen AO continuous flow Biological Phosphorus Removal Processes.Anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes use aerobic phosphorous accumulating bacterium, are released by anaerobism Phosphorus, the aerobic excessive mode for inhaling phosphorus, the phosphorus being enriched in water body are stored in vivo, are removed finally by spoil disposal.
Up to the present, more anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes sewage treatment plants have been built up both at home and abroad, But anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes are in terms of handling city domestic sewage that there are some problems:
1) starting is slow；
The conventional anaerobic aerobic AO continuous flow Biological Phosphorus Removal Processes starting time is usually 30 days~60 days.
2) system is difficult to stable operation under underload；
City domestic sewage is the pollutant effluents that resident's daily life generates, and water quality characteristics are underloads, generally 0.5codg/g, biodegradability are high.
Under the conditions of underload 0.5CODg/g, AO continuous flow Biological Phosphorus Removal Processes sludge, which easily expands, to be difficult to stablize.
3) system can not be started and run under low temperature；
Different temperature is affected to the metabolism growth of active sludge microorganism, 14 DEG C of low temperature or less anaerobic fermentation bacteriums Activity is lower, decomposes the lower growth needs for being difficult to meet polyP bacteria in biological phosphate-eliminating of Vfa Concentration generated.3 ~April and temperature fluctuation in 10~November are more quick, and anaerobic-aerobic AO continuous flow biological phosphate-eliminating reactor is often due to temperature Quickly change and expands.Under 4~October normal temperature state, anaerobic-aerobic AO continuous flow biological phosphate-eliminating reactor is often due to low Sludge bulking occurs for the accumulation of load and silk sulphur bacterium, operation 3 months or so, it is difficult to stablize.
Above problem constrains anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes in terms of city domestic sewage processing Using.
Denitrifying phosphorus removal technique (A is invented the 1990s2O and A2N technique), solve the difficulty that sludge is easy to expand Topic, is a kind of widely used continuous flow dephosphorization process in current municipal sewage plant, in processing city domestic sewage side Face is instead of traditional anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes, but the presence of denitrification Biological Phosphorus Removal Processes is asked as follows Topic:
1) single sludge anaerobic Anoxic/Aerobic A2O continuous flow denitrification Biological Phosphorus Removal Processes, to water inlet nitrogen, phosphorus ratio require compared with To be stringent, and need assistant chemical dephosphorization；
2) double sludge anaerobic anoxic dephosphorizations-anaerobic-aerobic denitrogenation A2N continuous flow double sludge system, process is complicated, needs Recombinant is respectively started, it is more stringent to water inlet nitrogen, phosphorus ratio requirement, and need assistant chemical dephosphorization；
The starting of the aerobic AO continuous flow Biological Phosphorus Removal Processes of conventional anaerobic is run using anaerobic-aerobic continuous flow, first in starting Phase needs to be inoculated with after having the sludge acclimatization enrichment of phosphorus removal functional, and normally starting the time is 30 days~60 days.
Conventional anaerobic Anoxic/Aerobic A2The starting of O continuous flow Biological Phosphorus Removal Processes needs to be respectively started anaerobic/anoxic biology and removes Phosphorus function and anaerobic-aerobic biological denitrificaion function, two functions combine after starting successfully, conventional anaerobic Anoxic/Aerobic A2O continuous flow is raw The starting time of object dephosphorization process is 30 days~60 days.
Summary of the invention
Technical problems to be solved: a kind of starting method of full biological phosphate-eliminating AOO technique is provided, is to traditional anaerobic-aerobic The upgrading of AO continuous flow Biological Phosphorus Removal Processes, handling in the city domestic sewage for underload 0.5CODg/g can in upper 7 days It enough realizes quick start, and does not need assistant chemical dephosphorization.
A kind of technical solution: starting method of full biological phosphate-eliminating AOO technique, comprising the following steps:
Step 1: the domestication concentration stage before starting, comprising:
(1) sludge anaerobic contact: the sludge of inoculation is put into 1200L reactor, introduces the real life of 1/3 volume Sewage, Anaerobic Contact 20~for 24 hours, the sludge is the excess sludge of conventional sewage plant or the activity with biological phosphate-eliminating of maturation Sludge；The excess sludge color of the conventional sewage plant is khaki, and dephosphorization activity < 10%, which needs overall process to tame Stage, domestication incubation time are 8d；The activated sludge color with biological phosphate-eliminating of the maturation is grey wadding body, dephosphorization activity 40%~70%, it the step of which needs not move through the first step (1) and (2), can be directly entered step (3), when domestication culture Between be 5d；
This step purpose is: the excess sludge of conventional sewage plant belongs to superoxidant state, is in decaying in biocycle Area, and contain more nitrobacteria, by Anaerobic Contact, the organic matter in sewage is adsorbed on the outside of mud granule, and swashs The anaerobism function of a part of amphimicrobian aerobic bacteria living promotes this kind of amphimicrobian aerobic bacteria to be capable of anaerobism absorption abundance Carbon source；
(2) sludge aerobic height aeration domestication: carrying out the high aeration domestication of 30~36h, and dissolved oxygen concentration > 2mg/L passes through This step sludge color is changed into red by khaki；
This step purpose is:
1) promote aerobic microbiological in sludge to utilize external carbon source, increase activated sludge concentration；
2) again by extended aeration, consume aerobic-anaerobic microbe cell interior carbon source in sludge excessively, promote aerobic sludge and Facultative aerobic sludge is in starvation；
(3) sludge quantity amplification and optimal aeration quantity find the stage: to fill domestication after sludge reactor in fill reality Sanitary sewage improves dissolved oxygen concentration, aerobic section Dissolved Oxygen concentration Control is in 2mg/L, root using reflux cycle in anaerobic-aerobic According to the Expenditure Levels of dissolved oxygen in reactor, best total aeration quantity is found；
This step purpose is:
1) it is enriched with sludge concentration；
2) by control dissolved oxygen concentration, best total aeration quantity is found；
(4) sludge concentration is significantly increased at this time, and sludge concentration reaches 5000mg/L in reactor at 14~18 DEG C of low temperature ~8000mg/L or 20~25 DEG C of reactor sludge concentrations reach 2000mg/L~3000mg/L at normal temperature, i.e., it is believed that this rank Section is completed, this stage running time is 5d；Step 2: startup stage:
(1) enter reactor, anaerobism section, aerobic first section, aerobic middle section and aerobic latter end, anaerobism section is respectively set in reactor Hydraulic detention time is 0.7-1h unanimously with tradition AO technique consistent (anaerobic-aerobic Process)；
(2) in aerobic first section control dissolved oxygen concentration in 0.3~0.7mg/L, hydraulic detention time 0.7~1h, it is aerobic in Section and latter end dissolved oxygen concentration are in 1.0~1.6mg/L, 1.5~2h of hydraulic detention time, and 20~25 DEG C of operating conditions of sludge age room temperature are 5~6d, 14~18 DEG C of operating conditions of sludge age low temperature are 6~7d, control reflux ratio 50%~60%.
System is controlled by These parameters, 7 days dephosphorization activity of system longest continuous operation can reach 75% or more, Full biological phosphate-eliminating AOO technique starts successfully.
The utility model has the advantages that
1, system starting is quick: full biological phosphate-eliminating AOO technique can start success for longest 7 days, and traditional anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes need 30~60 days can start success.
2, starting success rate is high, stable: traditional anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes low temperature 14~ It is difficult to start under the conditions of 18 DEG C of underload 0.5CODg/g, start successfully under the conditions of 20~25 DEG C of underload 0.5CODg/g of room temperature Afterwards, system is influenced by factors such as heavy rain, load impacts also easily to collapse；Use the starting method of full biological phosphate-eliminating AOO technique with Starting and stable is able to achieve under the conditions of upper.
3, save aeration quantity: traditional anaerobic-aerobic AO continuous flow Biological Phosphorus Removal Processes require aeration section dissolved oxygen concentration cannot Lower than 2mg/L, it is just able to achieve stable operation；The aerobic first section Dissolved Oxygen concentration Control of full biological phosphate-eliminating AOO technique 0.3~ 0.7mg/L, back segment dissolved oxygen concentration can be controlled in 0.7~1.6mg/L according to the requirement of water quality treatment, that is, are able to achieve stable fortune Row, average dissolution oxygen concentration is in 1mg/L.
4, the main reason for traditional handicraft needs the long period relative to the starting of full biological phosphate-eliminating AOO technique is: in system In start-up course, it is unable to the content of polyP bacteria in selective enrichment sludge.PolyP bacteria needs to be selected by controlling sludge age The screening of selecting property, it usually needs 2~3 sludge ages can just have entry condition, while in 2~3 sludge age periods, with The continuous reduction of sludge concentration, system sludge bulking also easy to happen cause to collapse, this is also the aerobic AO continuous flow of conventional anaerobic Dephosphorization process is difficult to the problem of starting key point under the conditions of underload 0.5CODg/g.The starting of full biological phosphate-eliminating AOO technique Method changes the selection mechanism of polyP bacteria, is substantially finished limit oxygen selective enrichment polyP bacteria in aerobic first section, reduces The time of starting.
Detailed description of the invention
Fig. 1 is full biological phosphate-eliminating AOO process reactor experimental provision
In figure: 1, blender；2, water inlet；3, return pipe；4, detection device pH meter；5, detection device ORP is counted；6, it dissolves Oxygen instrument；7, detection device sludge concentration meter；8, overflow port；9, anaerobism section；10, aerobic first section；11, aerobic middle section；12, aerobic end Section；13, sedimentation basin.
Specific embodiment
Water is used in test based on certain community life sewage, and specific water quality is as follows: COD=300~400mg/L, NH4+-N =55~85mg/L, NO2-- N≤0.25mg/L, NO3-- N≤1.5mg/L, TP=6~7mg/L, pH=7.0~8.5.
Embodiment 1
Reactor types are continuous flow baffle plate AO reactor as shown in Figure 1:, and blender 1 is respectively set, water inlet 2, returns Flow tube 3, detection device pH meter 4, detection device ORP count 5, dissolved oxygen instrument 6, detection device sludge concentration meter 7, overflow port 8, anaerobism Section 9, aerobic first section 10, aerobic middle section 11, aerobic latter end 12, sedimentation basin 13；Blender is arranged in anaerobism section；Anaerobism section, aerobic head Section, aerobic middle section, aerobic latter end bottom is respectively provided with micro porous aeration head, and controls aeration quantity by gas flowmeter.
Anaerobism segment body product: reactor total volume is 1:3.3；Aerobic first section volume: aerobic section total volume ratio is 1:3.3.
Reaction temperature low temperature (14~18 DEG C) is inoculated with the work that sewage plant is fetched first in continuous flow baffle plate AO reactor Property sludge, the initial tp removal rate of sludge are only had 10%, are tamed with actual domestic wastewater.
A kind of starting method of full biological phosphate-eliminating AOO technique, comprising the following steps:
Step 1: the domestication concentration stage before starting, comprising:
(1) sludge anaerobic contact: the excess sludge of inoculation conventional activated sludge sewage plant, sludge color khaki, dephosphorization Activity < 10%, sludge concentration 3000mg/L is inoculated with volume 60L, puts into 2m3In reactor, the real life of 1/3 volume is introduced Sewage, Anaerobic Contact is for 24 hours；
(2) sludge aerobic height aeration domestication: by Anaerobic Contact for 24 hours, pollutant sufficiently wraps up wadding body in sludge Surface, carries out the high aeration domestication of 33h at this time, and dissolved oxygen concentration > 2mg/L is changed by this step sludge color by khaki For red；
(3) sludge quantity amplification and optimal aeration quantity find the stage: to fill domestication after sludge reactor in fill reality Sanitary sewage improves dissolved oxygen concentration using reflux cycle in anaerobic-aerobic, aerobic section Dissolved Oxygen concentration Control in 2mg/L, with After start anaerobic-aerobic continuous flow operation, flow of inlet water 200L/h, sludge loading 0.4, reflux ratio 50%, this stage is not Spoil disposal, for aeration mode using decrescence aeration mode, aeration quantity summation is 30ml/min, and aerobic first section is aerated 15mg/L, it is aerobic in Section aeration 9ml/min, aerobic latter end are aerated 6ml/min, and aerobic first section dissolved oxygen concentration is 3mg/L, are discharged limpid, sludge at this time Precipitability is preferable, and sludge volume index (SVI) is 55mL/g, and phosphor-removing effect only has 20%, and anaerobism section, which has, micro releases phosphorus, aerobic suction Phosphorus is poor；
(4) sludge concentration is significantly increased at this time, and sludge concentration reaches 5000mg/L~7000mg/L in reactor, can recognize Stage success thus, this stage running time are 5 days, this stage sludge color switchs to field gray by red；
Secondary settling tank is likely to occur denitrifying floating sludge phenomenon, reduces aeration quantity summation at this time to 25mL/min, aerobic first section exposes Tolerance is 10ml/min, and aerobic middle section aeration quantity is 9mL/min, and aerobic latter end aeration quantity is 6mL/min, is run to the 5th day, such as Sludge concentration is higher than 9000mg/L in fruit secondary settling tank, in fact it could happen that releases phosphorus phenomenon 2 times, can pass through quick sludge discharge way solution at this time Certainly, every 3 hours spoil disposal 60L, which amount to spoil disposal 240L, quickly reduces sludge concentration in reactor.Step 2: startup stage:
Sludge loading 0.5CODg/g, flow of inlet water 150L/h, reflux ratio 60%, sludge age 7.69 days, aeration total amount was steady It is scheduled on 22ml/min；
(1) enter reactor, anaerobism section, aerobic first section, aerobic middle section and aerobic latter end, anaerobism section is respectively set in reactor Hydraulic detention time is consistent with tradition AO technique, is 0.7h；
(2) in aerobic section, each section of aeration is assigned as aerobic first section 8ml/min, aerobic middle section 8ml/min, aerobic end 6ml/min；First section controls dissolved oxygen concentration in 0.5mg/L, hydraulic detention time 0.8h, aerobic middle section and latter end dissolved oxygen concentration In 1.3mg/L, hydraulic detention time 1.8h, continuous operation 7 days, SVI was to stablize in 90~100mL/g, and sludge concentration is stablized 4300mg/L, returned sludge concentration are stablized in 7000~8000mg/L.
Phosphor-removing effect is promoted to 75%~90%, is run to the 7th day, and water outlet phosphorus concentration has been less than 1mg/L, and it is complete to reach AOO Quick start in Biological Phosphorus Removal Processes 7 days.
Embodiment 2
Influent quality and reactor types are same as above.
It is living to be inoculated with seed sludge dephosphorization first in continuous flow baffle plate AO reactor for reaction temperature room temperature (20~25 DEG C) Property 40%~75%, be inoculated with volume 60L, sludge concentration 1500mg/L.
A kind of starting method of full biological phosphate-eliminating AOO technique, comprising the following steps:
Step 1: the domestication concentration stage before starting, comprising:
(1) sludge quantity amplification and optimal aeration quantity find the stage: to fill domestication after sludge reactor in fill reality Sanitary sewage controls volumetric loading 2g/L, total aeration quantity 30ml/min, each section of dissolved oxygen using reflux cycle in anaerobic-aerobic Concentration control sludge concentration in 2mg/L~4mg/L, reactor starts continuum micromeehanics anaerobic-aerobic after increasing to 2000mg/L Operation, spoil disposal, flow of inlet water control are not 150~200L/h, and sludge loading is controlled in 0.5~0.7CODg/g；
Reactor sludge concentration increases to 3500~4000mg/L in (2) 5 days, and reflux ratio is 30%~50%, recognizes at this time It has tamed and has been enriched with successfully for sludge；
Step 2: startup stage:
Sludge loading 0.5CODg/g, flow of inlet water 150L/h, reflux ratio 50%, sludge age 3.5-5.77 days, aeration was total Amount is stablized in 22ml/min；
(1) enter reactor, anaerobism section, aerobic first section, aerobic middle section and aerobic latter end, anaerobism section is respectively set in reactor Hydraulic detention time is consistent with tradition AO technique, is 1h；
(2) in aerobic section, each section of aeration is assigned as aerobic first section 8ml/min, aerobic middle section 8ml/min, aerobic end 6ml/min；First section controls dissolved oxygen concentration in 0.5mg/L, hydraulic detention time 0.8h, aerobic middle section and latter end dissolved oxygen concentration In 1.3mg/L, hydraulic detention time 1.8h, continuous operation 7 days, SVI was to stablize in 90~100mL/g, and sludge concentration is stablized 1700mg/L, returned sludge concentration are stablized in 3000~4500mg/L.
Phosphor-removing effect is promoted to 75%~90%, is run to the 7th day, and water outlet phosphorus concentration has been less than 1mg/L, and it is complete to reach AOO Quick start in Biological Phosphorus Removal Processes 7 days.

Claims (4)

1. a kind of starting method of full biological phosphate-eliminating AOO technique, it is characterised in that: the following steps are included:
Step 1: the domestication concentration stage before starting, comprising:
(1) sludge anaerobic contact: the sludge of inoculation is put into reactor, introduces actual domestic wastewater, Anaerobic Contact；
(2) the high aeration domestication of 30~36h, dissolved oxygen concentration > 2mg/L sludge aerobic height aeration domestication: are carried out；
(3) sludge quantity amplification and optimal aeration quantity find the stage: to fill domestication after sludge reactor in fill real life Sewage improves dissolved oxygen concentration, aerobic section Dissolved Oxygen concentration Control is in 2mg/L, according to anti-using reflux cycle in anaerobic-aerobic The Expenditure Levels of dissolved oxygen in device are answered, best total aeration quantity is found；
(4) sludge concentration is significantly increased at this time, at 14~18 DEG C of low temperature in reactor sludge concentration reach 5000mg/L~ 8000mg/L or 20~25 DEG C of reactor sludge concentrations reach 2000mg/L~3000mg/L at normal temperature, i.e., it is believed that this stage Success, this stage running time are 5d；
Step 2: startup stage:
(1) enter reactor, anaerobism section, aerobic first section, aerobic middle section and aerobic latter end, anaerobism section waterpower is respectively set in reactor Residence time is consistent with anaerobic-aerobic AO Biological Phosphorus Removal Processes；
(2) in aerobic first section control dissolved oxygen concentration in 0.3~0.7mg/L, 0.7~1h of hydraulic detention time, aerobic middle section and Latter end dissolved oxygen concentration is in 1.0~1.6mg/L, 1.5~2h of hydraulic detention time, and 20~25 DEG C of operating conditions of sludge age room temperature are 5~ 6d, 14~18 DEG C of operating conditions of sludge age low temperature are 6~7d, control reflux ratio 50%~60%.
2. a kind of starting method of full biological phosphate-eliminating AOO technique according to claim 1, it is characterised in that: described first Sludge is the excess sludge of conventional sewage plant or the activated sludge with biological phosphate-eliminating of maturation in rapid (1) step by step.
3. a kind of starting method of full biological phosphate-eliminating AOO technique according to claim 2, it is characterised in that: the routine The excess sludge color of sewage plant be khaki, dephosphorization activity < 10%, the sludge need overall process tame the stage, domestication culture Time is 8d.
4. a kind of starting method of full biological phosphate-eliminating AOO technique according to claim 2, it is characterised in that: the maturation The activated sludge color with biological phosphate-eliminating be grey wadding body, dephosphorization activity 40%~70%, the sludge needs not move through the The step of one step (1) and (2) can be directly entered step (3), and domestication incubation time is 5d.
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CN112645451A (en) * 2021-01-12 2021-04-13 北京工业大学 Method for strengthening biological phosphorus removal of municipal sewage A/O process through internal sludge reflux
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CN106186315A (en) * 2016-07-10 2016-12-07 北京工业大学 A kind of city domestic sewage flows the apparatus and method of AOA advanced nitrogen dephosphorization continuously
CN107487838A (en) * 2017-08-21 2017-12-19 吉林大学 SBR tames the method and device that special sludge structure realizes low-temperature sewage efficient dephosphorization

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CN111302488A (en) * 2019-12-11 2020-06-19 江苏孚璋生物技术有限公司 Starting method of continuous flow automatic domestic sewage treatment equipment
CN112978915A (en) * 2019-12-16 2021-06-18 江苏孚璋生物技术有限公司 Method for controlling treatment water quantity of continuous flow domestic sewage treatment equipment
CN112645451A (en) * 2021-01-12 2021-04-13 北京工业大学 Method for strengthening biological phosphorus removal of municipal sewage A/O process through internal sludge reflux
CN112645451B (en) * 2021-01-12 2022-09-09 北京工业大学 Method for strengthening biological phosphorus removal of municipal sewage A/O process through internal sludge reflux

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