CN107487838A - SBR tames the method and device that special sludge structure realizes low-temperature sewage efficient dephosphorization - Google Patents
SBR tames the method and device that special sludge structure realizes low-temperature sewage efficient dephosphorization Download PDFInfo
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- CN107487838A CN107487838A CN201710715996.8A CN201710715996A CN107487838A CN 107487838 A CN107487838 A CN 107487838A CN 201710715996 A CN201710715996 A CN 201710715996A CN 107487838 A CN107487838 A CN 107487838A
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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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses the method and device that a kind of special sludge structure of SBR domestications realizes low-temperature sewage efficient dephosphorization, this method is alternately to tame out substantial amounts of polyP bacteria PAOs using traditional anaerobic-aerobic environment, when system outputted aerobic water tp removal rate is more than 90% and stable operation, it is good to be regarded as the stage effectiveness, polyP bacteria largely exists in inside reactor；Hereafter, anaerobic environment duration is adjusted, and by monitoring the DO values of critical aerobic environment, controls it in 1.0mg/L 1.5mg/L, this reduction for sewage plant operating cost has very great help.The sludge of specific form structure is tamed, makes to be in different environment inside and outside it, reaches water body NO3 ‑‑N、NO2 ‑N and PO4 3‑P is synchronously removed, and is reduced subsequently for the handling process of sewage, is further reduced processing cost.
Description
Technical field
The present invention relates to the method that a kind of special sludge structure of SBR domestications realizes low-temperature sewage efficient dephosphorization, belong to sewage
Biologic treating technique field.SBR means sequencing batch active sludge.
Background technology
There is very heavy the removal of phosphorus for the influence of eutrophication to caused by surface water body after discharge into water in municipal sewage
Big meaning.Removal in sewage disposal to phosphorus at present mainly uses traditional A/A/O technologies or SBR technologies, the original of the technology
Reason is that the alternating of aerobic two kinds of environment supplies to provide suitable environment by controlling the environment residing for reactor, that is, controlling anaerobism
Phosphorus and excessive suction phosphorus are normally released to polyP bacteria PAOs (polyphosphorus accumulating organisms), and then
Reach the purpose for removing phosphorus in water body by being arranged outside sludge in aerobic latter stage.
Winter sewage has the characteristics of variation water quality is big, and temperature is low, because growth and breeding and metabolism of the temperature to microorganism
Have a great impact, therefore temperature becomes the important factor in order of Biochemical method sewage, this is for sewage under cryogenic conditions
The normal operation for the treatment of plant causes very big pressure.Due under low temperature (8 DEG C -14 DEG C), polyP bacteria PAOs under anaerobic environment
(polyphosphorus accumulating organisms) can not reach the release of phosphorus inside completely, and then aerobic
Stage can not carry out the absorption of excessive phosphorus, at the same time, due to aerobic NH in reactor4 +- N nitrification so that reaction
There is considerable degree of NO inside device3 -- N or NO2 -- N, this competition for inside reactor nitration denitrification bacterium and polyP bacteria
Favorable environment is provided, therefore, under the low temperature environment that PAOs does not occupy superiority, it is easier to so that whole reactor pair
In the failure of dephosphorization.
In addition to temperature, the control of dissolved oxygen (DO) is played with control most important for the alternating of anaerobic-aerobic environment
Effect, the anaerobic condition of anaerobism section (Ji Shilin areas) is particularly important in Biological Phosphorus Removal Processes, and it directly affects polyP bacteria herein
The ability released phosphorus ability, synthesize PHB of section and the excess of aerobic section take the photograph phosphorus ability.According to document announcement, the dissolved oxygen of anaerobism section
Should control should control in 1.5mg/L~2.5mg/L in below 0.2mg/l, the dissolved oxygen of aerobic section.
Realize that the bottleneck of low-temperature sewage dephosphorization is finite concentration NO3 -- N or NO2 -Under-N existence conditions, nitrobacteria,
Denitrifying bacteria and polyP bacteria PAOs competition, and the excessive not only cost of reactor aerobic stage aeration are high, can also cause dirt
The loose and problem of aging of mud.If NO caused by inside reactor can be reduced3 -- N or NO2 -- N concentration, control optimal exposure
Tolerance, then it is expected to realize the efficient dephosphorization of sewage under cryogenic conditions.
The content of the invention
The purpose of the present invention is difficult to efficient the problem of removing completely of phosphorus aiming at existing low-temperature sewage, is based on
Reduce competition, there is provided optimal PAOs suitable conditions, it is proposed that a kind of SBR method of operation, build critical aerobic state to replace
Traditional aerobic environment, the sludge with special construction is tamed out, realize the efficient dephosphorization of low-temperature sewage.This method is adopted first
Substantial amounts of polyP bacteria PAOs alternately is tamed out with traditional anaerobic-aerobic environment, is more than in system outputted aerobic water tp removal rate
90% and during stable operation, it is regarded as that the stage effectiveness is good, and polyP bacteria largely exists inside sbr reactor device；Hereafter, adjustment is detested
Oxygen environment duration, the DO values of critical aerobic environment are monitored, control it in 1.0mg/L-1.5mg/L, build critical aerobic ring
Border, at the same time, it is critical aerobic environment that sludge is changed into outside by traditional morphosis, inside and outside to have the hole that der Pilz is built
Hole, inside are anaerobic environment, and due to nitrobacteria in water body, NO caused by denitrifying bacteria3 -- N and NO2 -- N can be at this
Utilized under environment by denitrifying bacteria, NO3 -- N and NO2 -- N will not be accumulated in sbr reactor device, and then it is thin to relieve nitrification
The competition of bacterium and denitrifying bacteria for polyP bacteria PAOs, due to the cryogenic conditions PAOs that previous stage tames out be can be fine
This environment is adapted to, therefore, with the operation of sbr reactor device, it is real to be increasingly becoming the maximum microbial species of internal system content
Show the efficient dephosphorization of sewage under cryogenic conditions, can pass through follow-up institute for the result of each species abundance in sbr reactor device
The grand gene order-checking result done embodies.The method of operation solves the problem that low-temperature sewage is difficult to efficient dephosphorization, and further
Reduce the energy expenditure and operating cost of sewage plant.
A kind of SBR of the present invention tames the device that special sludge structure realizes low-temperature sewage efficient dephosphorization, and it includes city
City wastewater influent pond, sbr reactor device, processing water discharge bay, intake pump, air pump, aerator, fluid flowmeter, gas flow
Meter, agitating device, agitating device controller, dissolved oxygen and temperature detector and industrial computer, municipal sewage intake pool pass through water inlet
Pump is connected with sbr reactor device, and fluid flowmeter is provided with the pipeline between municipal sewage intake pool and intake pump, and processing water goes out
Pond connects with sbr reactor device, and agitating device, dissolved oxygen and temperature detector are located in sbr reactor device, and agitating device is by stirring
Setup Controller controls, and aerator is arranged on the bottom in sbr reactor device, and aerator connects with air pump, aerator and
Gas flowmeter, fluid flowmeter, intake pump, agitating device controller, dissolved oxygen and temperature are installed on the pipeline between air pump
Degree detector, air pump and gas flow meter are connected with industrial computer, industrial computer control fluid flowmeter, intake pump, agitating device
Controller, dissolved oxygen and temperature detector, the work of air pump and gas flow meter.
By dissolved oxygen and the real-time monitoring result of temperature detector, critical aerobic stage DO values are controlled, to consume NO3 --N
Or NO2 -- N, competition of other microorganisms for polyP bacteria PAOs is released, realize the efficient dephosphorization of reactor.
Sewage used is sanitary sewage during experiment, and its water quality situation is as follows：TP concentration is 8mg/L-12mg/L；NO3 --N
Concentration is 1.0mg/L-1.2mg/L；NO2 -- N concentration<0.5mg/L；COD concentration is 150mg/L-300mg/L.Sbr reactor device is
Stainless steel is made, and sbr reactor device cumulative volume is 20L, effective volume 16L.
Each cycle inlet flow-patterm is adjusted to 7.0-7.5, is not made any adjustments thereafter for sewage pH；During whole service, root
Irregular mud discharging is carried out according to sludge quantity inside sbr reactor device.
It is as follows that SBR tames operation when special sludge structure realizes the device carrying out practically of low-temperature sewage efficient dephosphorization：
1) startup stage：The sludge of inoculation municipal sewage plant's Aerobic Pond operational excellence is added to sbr reactor device, is made
It is stable in 1200mg/L-2000mg/L in the later stage to obtain sludge concentration MLSS；
2) operation phase：
2.1) it is enriched with the polyP bacteria stage：Whole sbr reactor device sets anaerobism, aerobic two environment, when two environment are run
Long ratio is 3:5, wherein anaerobic environment realizes the abundant contact of muddy water with mixing using agitating device, and ensures DO<0.5mg/L,
Aerobic environment provides the oxygen that sbr reactor Qi Nei Institute of Micro-biology needs using bottom aerator, and now DO is in 2.0mg/L-
Between 2.5mg/L；After operation 43 days, the clearance of outputted aerobic water phosphorus is stable to be more than 90%, is considered as polyP bacteria inside sbr reactor device
PAOs enrichment success, now polyP bacteria PAOs had the advantage in whole environment status, the operation of next step can be carried out.
2.2) the commencement of commercial operation stage：Whole sbr reactor device sets anaerobism, critical aerobic two environment, with entering for operation
OK, gradually by two environment operation duration ratios from 1:1,2:1, it is changed into 4:1, to obtain the method for operation and minimum optimized
Energy consumption and operating cost.Wherein anaerobic environment still realizes the abundant contact of muddy water with mixing using agitating device, and ensures DO<
0.5mg/L, according to the result of the dissolved oxygen detector monitors inside sbr reactor device, control bottom aeration flow, it is critical good to ensure
The DO of oxygen environment is between 1.0mg/L-1.5mg/L；It is and optimal to obtain by constantly converting the operation duration under two kinds of environment
The method of operation, at the same time, confirm that now sludge has special morphosis by ESEM result, and proved critical
NO under aerobic state3 -- N and NO2 -- N does not have the guess largely accumulated, and the stage is run 74 days altogether, later stage critical outputted aerobic water
The clearance of phosphorus can approximation regard 100% as, and sbr reactor device water outlet does not have NO3 -- N and NO2 -- N a large amount of accumulation.
Test result indicates that：After the device of the present invention is stable under this kind of operational mode, water outlet P concentration is less than detection
Limit, NO3 -- N concentration is in 2.0mg/L-2.5mg/L, NO2 -- N concentration is in 1.0mg/L-1.5mg/L, and COD concentration is in 90mg/L-
110mg/L。
It is of the invention to be had the advantages that compared with existing traditional biological method dephosphorization process：
1st, efficient dephosphorization at low ambient temperatures can be realized, and inside reactor sludge concentration MLSS is aerated than tradition
The concentration that pond needs is low.
2nd, construct critical aerobic state, the environment for aeration quantity demand well below aerobic environment in traditional handicraft
Demand, in 1.0mg/L-1.5mg/L, this reduction for sewage plant operating cost has very great help for its DO controls.
3rd, the sludge of specific form structure is tamed, makes to be in different environment inside and outside it, reaches water body NO3 --N、NO2 --N
And PO4 3-- P is synchronously removed, and is reduced subsequently for the handling process of sewage, is further reduced processing cost.
Brief description of the drawings
Fig. 1 is that SBR tames the schematic device that special sludge structure realizes low-temperature sewage efficient dephosphorization.
Embodiment
A kind of SBR of the present invention tames the method that special sludge structure realizes low-temperature sewage efficient dephosphorization, and this method is first
It is that substantial amounts of polyP bacteria PAOs is alternately tamed out using traditional anaerobic-aerobic environment, it is big in system outputted aerobic water tp removal rate
In 90% and during stable operation, it is regarded as that the stage effectiveness is good, and polyP bacteria largely exists in inside reactor；Hereafter, adjustment is detested
Oxygen environment duration, and monitor by the dissolved oxygen concentration inductor of inside reactor the DO values of critical aerobic environment, control its
In 1.0mg/L-1.5mg/L, critical aerobic environment is built, at the same time, sludge is changed into outside by traditional morphosis
Inside and outside to have the hole that der Pilz is built for critical aerobic environment, inside is anaerobic environment, and due to nitrobacteria in water body,
NO caused by denitrifying bacteria3 -- N and NO2 -- N can be utilized by denitrifying bacteria in the present context, NO3 -- N and NO2 -- N will not
Accumulated in reactor, and then relieve the competition of nitrobacteria and denitrifying bacteria for polyP bacteria PAOs, due to preceding single order
The cryogenic conditions PAOs that tames out of section can adapt to this environment very well, therefore, with the operation of reactor, be increasingly becoming and be
The maximum microbial species of the internal content of system realize the efficient dephosphorization of sewage under cryogenic conditions, for each species in reactor
The result of abundance can be embodied by the grand gene order-checking result subsequently done.The method of operation solves low-temperature sewage and is difficult to
The problem of efficient dephosphorization, and reduce further the energy expenditure and operating cost of sewage plant.
As shown in figure 1, a kind of SBR of the present invention tames the device that special sludge structure realizes low-temperature sewage efficient dephosphorization,
It includes municipal sewage intake pool 1, sbr reactor device 2, processing water discharge bay 3, intake pump 4, air pump 5, aerator 6, liquid
Flowmeter 7, gas flowmeter 8, agitating device 9, agitating device controller 10, dissolved oxygen and temperature detector 11 and industrial computer
12, municipal sewage intake pool 1 is connected by intake pump 4 with sbr reactor device 2, between municipal sewage intake pool 1 and intake pump 4
Fluid flowmeter 7 is installed, processing water discharge bay 3 connects with sbr reactor device 2, agitating device 9, dissolved oxygen and temperature on pipeline
Detector 11 is located in sbr reactor device 2, and agitating device 9 is controlled by agitating device controller 10, and it is anti-that aerator 6 is arranged on SBR
The bottom in device 2 is answered, aerator 6 is connected with air pump 5, and gas flow is provided with the pipeline between aerator 6 and air pump 5
Meter 8, fluid flowmeter 7, intake pump 4, agitating device controller 10, dissolved oxygen and temperature detector 11, air pump 5 and gas flow
Meter 8 is connected with industrial computer 12, industrial computer 12 control fluid flowmeter 7, intake pump 4, agitating device controller 10, dissolved oxygen and
Temperature detector 11, the and gas flow meter 8 of air pump 5 work.
By 11 real-time monitoring result of dissolved oxygen and temperature detector, critical aerobic stage DO values are controlled, to consume
NO3 -- N or NO2 -- N, competition of other microorganisms for polyP bacteria PAOs is released, realize the efficient dephosphorization of reactor.
Sewage used is sanitary sewage during experiment, and its water quality situation is as follows：TP concentration is 8mg/L-12mg/L；NO3 --N
Concentration is 1.0mg/L-1.2mg/L；NO2 -- N concentration<0.5mg/L；COD concentration is 150mg/L-300mg/L.Experimental system is as schemed
Shown in 1, sbr reactor device 2 is made up of stainless steel, and the cumulative volume of sbr reactor device 2 is 20L, effective volume 16L.
Each cycle inlet flow-patterm is adjusted to 7.0-7.5, is not made any adjustments thereafter for sewage pH；During whole service, root
Irregular mud discharging is carried out according to the inside sludge quantity of sbr reactor device 2.
It is as follows that SBR tames operation when special sludge structure realizes the device carrying out practically of low-temperature sewage efficient dephosphorization：
1) startup stage：The sludge of inoculation municipal sewage plant's Aerobic Pond operational excellence is added to sbr reactor device 2,
So that sludge concentration MLSS is stable in 1200mg/L-2000mg/L in the later stage；
2) operation phase：
2.1) it is enriched with the polyP bacteria stage：Whole sbr reactor device 2 sets anaerobism, aerobic two environment, when two environment are run
Long ratio is 3:5, wherein anaerobic environment realizes the abundant contact of muddy water with mixing using agitating device 9, and ensures DO<0.5mg/L,
Aerobic environment provides the oxygen that Institute of Micro-biology needs in sbr reactor device 2 using bottom aerator 6, and now DO is in 2.0mg/L-
Between 2.5mg/L；After operation 43 days, the clearance of outputted aerobic water phosphorus is stable to be more than 90%, is considered as the poly- phosphorus in the inside of sbr reactor device 2
Bacterium PAOs enrichment success, now polyP bacteria PAOs had the advantage in whole environment status, the operation of next step can be carried out.
2.2) the commencement of commercial operation stage：Whole sbr reactor device 2 sets anaerobism, critical aerobic two environment, with entering for operation
OK, gradually by two environment operation duration ratios from 1:1,2:1, it is changed into 4:1, to obtain the method for operation and minimum optimized
Energy consumption and operating cost.Wherein anaerobic environment still realizes the abundant contact of muddy water with mixing using agitating device 9, and ensures DO<
0.5mg/L, according to the result of the dissolved oxygen detector monitors inside sbr reactor device 2, control bottom aeration flow, ensure critical
The DO of aerobic environment is between 1.0mg/L-1.5mg/L；And obtained most by constantly converting the operation duration under two kinds of environment
The excellent method of operation, at the same time, confirm that now sludge has special morphosis, and proved and faced by ESEM result
NO under the aerobic state in boundary3 -- N and NO2 -- N does not have the guess largely accumulated, and the stage is run 74 days altogether, the later stage it is critical it is aerobic go out
The clearance of water phosphorus can approximation regard 100% as, and the water outlet of sbr reactor device 2 does not have NO3 -- N and NO2 -- N a large amount of products
It is tired.
Test result indicates that：After the device of the present invention is stable under this kind of operational mode, water outlet P concentration is less than detection
Limit, NO3 -- N concentration is in 2.0mg/L-2.5mg/L, NO2 -- N concentration is in 1.0mg/L-1.5mg/L, and COD concentration is in 90mg/L-
110mg/L。
Claims (3)
1. a kind of SBR tames the method that special sludge structure realizes low-temperature sewage efficient dephosphorization, it is characterised in that：It is to use first
Traditional anaerobic-aerobic environment alternately tames out substantial amounts of polyP bacteria PAOs, is more than 90% in system outputted aerobic water tp removal rate
And during stable operation, it is regarded as that the stage effectiveness is good, and polyP bacteria PAOs largely exists inside sbr reactor device；Hereafter, adjustment is detested
Oxygen environment duration, the DO values of critical aerobic environment are monitored, control it in 1.0mg/L-1.5mg/L, build critical aerobic ring
Border, at the same time, sludge are changed into outside for critical aerobic environment, the inside and outside hole for having der Pilz to build by traditional morphosis
Hole, inside are anaerobic environment, and due to NO caused by nitrobacteria and denitrifying bacteria in water body3 -- N and NO2 -- N can be at this
Utilized under environment by denitrifying bacteria, NO3 -- N and NO2 -- N will not be accumulated in sbr reactor device, and then it is thin to relieve nitrification
The competition of bacterium and denitrifying bacteria for polyP bacteria PAOs, because the cryogenic conditions PAOs that previous stage tames out is to fit very well
This environment is answered, therefore, as anti-SBR answers the operation of device, the maximum microbial species of internal system content is increasingly becoming, realizes
The efficient dephosphorization of sewage under cryogenic conditions.
2. a kind of SBR according to claim 1 tames the method that special sludge structure realizes low-temperature sewage efficient dephosphorization, its
It is characterised by：Comprise the concrete steps that：
1) startup stage：The sludge of inoculation municipal sewage plant's Aerobic Pond operational excellence is added to sbr reactor device so that dirty
Mud concentration MLSS is stable in (12) 00mg/L-2000mg/L in the later stage；
2) operation phase：
2.1) it is enriched with the polyP bacteria stage：Whole sbr reactor device sets anaerobism, aerobic two environment, two environment operation duration ratios
For 3:5, wherein anaerobic environment realizes the abundant contact of muddy water with mixing using agitating device, and ensures DO<0.5mg/L, it is aerobic
Environment provides the oxygen that sbr reactor Qi Nei Institute of Micro-biology needs using bottom aerator, and now DO is in 2.0mg/L-2.5mg/L
Between；After operation 43 days, the clearance of outputted aerobic water phosphorus is stable to be more than 90%, is considered as polyP bacteria PAOs inside sbr reactor device
It is enriched with successfully, now polyP bacteria PAOs has the advantage status in whole environment, can carry out the operation of next step；
2.2) the commencement of commercial operation stage：Whole sbr reactor device sets anaerobism, critical aerobic two environment, with the progress of operation, by
Gradually by two environment operation duration ratios from 1:1,2:1, it is changed into 4:1, to obtain the method for operation optimized and minimum energy consumption
With operating cost.Wherein anaerobic environment still realizes the abundant contact of muddy water with mixing using agitating device, and ensures DO<0.5mg/
L, according to the result of the dissolved oxygen detector monitors inside sbr reactor device, control bottom aeration flow, ensure critical aerobic environment
DO between 1.0mg/L-1.5mg/L；And obtain optimized operation side by constantly converting the operation duration under two kinds of environment
Formula, at the same time, confirm that now sludge has special morphosis by ESEM result, and proved critical aerobic shape
NO under state3 -- N and NO2 -- N does not have the guess largely accumulated, and the stage is run 74 days altogether, and later stage critical outputted aerobic water phosphorus is gone
Except rate can approximation regard (10) 0% as, and sbr reactor device water outlet does not have NO3 -- N and NO2 -- N a large amount of accumulation.
3. a kind of SBR tames the device that special sludge structure realizes low-temperature sewage efficient dephosphorization, gas is characterised by：Include city
Wastewater influent pond (1), sbr reactor device (2), processing water discharge bay (3), intake pump (4), air pump (5), aerator (6), liquid
Flowmeter (7), gas flowmeter (8), agitating device (9), agitating device controller (10), dissolved oxygen and temperature detector (11)
With industrial computer (12), municipal sewage intake pool (1) is connected by intake pump (4) with sbr reactor device (2), municipal sewage intake pool
(1) fluid flowmeter (7) is installed, processing water discharge bay (3) connects with sbr reactor device (2) on the pipeline between intake pump (4)
Logical, agitating device (9), dissolved oxygen and temperature detector (11) are located in sbr reactor device (2), and agitating device (9) is by agitating device
Controller (10) controls, and aerator (6) is arranged on the bottom in sbr reactor device (2), and aerator (6) connects with air pump (5)
It is logical, gas flowmeter (8), fluid flowmeter (7), intake pump are installed on the pipeline between aerator (6) and air pump (5)
(4), agitating device controller (10), dissolved oxygen and temperature detector (11), air pump (5) and gas flow meter (8) be and industry control
Machine (12) connect, industrial computer (12) control fluid flowmeter (7), intake pump (4), agitating device controller (10), dissolved oxygen and
Temperature detector (11), air pump (5) and gas flow meter (8) work.
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Cited By (5)
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| CN108609728A (en) * | 2018-05-30 | 2018-10-02 | 郭玉玲 | A kind of system and control method using dissolved oxygen modified sewage sludge filamentary discharges |
| CN109231477A (en) * | 2018-09-04 | 2019-01-18 | 江苏孚璋生物技术有限公司 | A kind of full biological phosphate-eliminating AOO technique room temperature operating condition and room temperature turn the control method of worst cold case stable operation |
| CN109231478A (en) * | 2018-09-04 | 2019-01-18 | 江苏孚璋生物技术有限公司 | A kind of starting method of full biological phosphate-eliminating AOO technique |
| CN109231479A (en) * | 2018-09-04 | 2019-01-18 | 江苏孚璋生物技术有限公司 | A kind of full biological phosphate-eliminating AOO technique low temperature, ultralow-temperature operation conditions and low temperature turn the control method of room temperature stable conditions operation |
| 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 |
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| CN109231477B (en) * | 2018-09-04 | 2021-11-26 | 江苏孚璋生物技术有限公司 | Control method for stable operation of all-biological phosphorus removal AOO process under normal temperature working condition and normal-temperature to low-temperature working condition |
| CN109231479B (en) * | 2018-09-04 | 2022-04-01 | 江苏孚璋生物技术有限公司 | Control method for stable operation of all-biological phosphorus removal AOO process under low-temperature and ultralow-temperature working conditions and working conditions from low temperature to normal temperature |
| CN109231478B (en) * | 2018-09-04 | 2022-04-01 | 江苏孚璋生物技术有限公司 | Starting method of all-biological phosphorus removal AOO process |
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