CN101372378B - Method for using SBR for quick start of continuous flow double sludge denitrification dephosphorization process - Google Patents
Method for using SBR for quick start of continuous flow double sludge denitrification dephosphorization process Download PDFInfo
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Abstract
A quick start method that can be applied on continuous flow double filthy mud denitrification dephosphorization process belongs to the field of activated sludge and sewage water treatment. The denitrifying phosphate accumulating sludge of the continuous flow two-sludge denitrifying phosphorus removal process and the biomembrane in a continuous flow two-sludge process biofilm nitrification tank are cultivated independently at intervals, then the denitrifying phosphate accumulating sludge and aerobic biofilm nitrification are put into a continuous flow two-sludge system. The traditional direct continuous cultivation start model needs to spend a plurality of months to achieve stability, but the method needs no more than two months to start successfully and achieve stability with high efficiency.
Description
Technical field
Technical field under the present invention is: the activated sludge process sewage treatment area.
Background technology
The continuous flow double sludge denitrification dephosphorization process reaches wherein microbial growth characteristic
The continuous flow double sludge denitrification dephosphorization process is to utilize this phosphorus of under anaerobic releasing of denitrification phosphorus-collecting bacterium (DPB), can utilize NO under anoxic environment
X --N is that the microorganism of the excessive suction phosphorus of electron acceptor(EA) is realized the removal to phosphor in sewage.The difference of itself and traditional dephosphorization process is to save the energy and carbon source, and the excess sludge of generation is few, is particularly suitable for handling the sewage of this low COD/TN ratio of city domestic sewage.This technology uses two to overlap independently sludge system: with the denitrification phosphorus-collecting bacterium as the Sludge System of main body with the biofilm system of aerobic nitrification microbial film as main body, avoided of the contention of two kinds of microorganisms to substrate, and they are being grown under the adapt circumstance separately, help the efficient operation of technology.Yet aggravation along with eutrophication problem, the urban sewage discharge standard is strict more to the requirement of water outlet phosphorus and nitrogen, and that the wastewater treatment in China ubiquity dephosphorization removing nitric efficiency is low, the energy consumption height, the characteristics that controlled levels is low, so be badly in need of the continuable novel process of this efficient energy-saving of continuous flow double sludge denitrification dephosphorization process, solve the environmental problem of the sternness that China faces better.
As mentioned above, the continuous flow double sludge denitrification dephosphorization process has two and overlaps independently microflora, denitrification phosphorus-collecting sludge system and biofilm system.The denitrification phosphorus-collecting bacterium has sludge age (SRT) characteristics short than the aerobic nitrification bacterium in the biofilm system.General directly culture sludge or the biomembranous method in process system of adopting of tradition denitrification dephosphorization technique, if and the continuous flow double sludge denitrification dephosphorization process adopts direct best cultivation, separately the growth of restriction that will influence each other of two cover systems causes operation to start slow situation.Therefore limiting the bottleneck that the continuous flow double sludge denitrification dephosphorization process uses in actual engineering is exactly the startup problem of system, the restriction that two kinds of microorganisms is grown fast well and not runed counter to by the other side and self growth conditions? if can make these two kinds of microorganisms independently cultivate respectively under the adapt circumstance, together inject the continuous flow double sludge denitrification dephosphorization system after cultivation is finished again, can not only solve the different of both sludge ages and can also in the shorter time, realize separately domestication cultivation for the contention of carbon source.Apply to actual engineering for this technology of promotion and have important in theory and realistic meaning.
The application of batch reactor (SBR)
The typical case of activated sludge process representative is a SBR technology in the time of intermittently.SBR is the abbreviation of sequence batch (batch activated sludge method (Sequencing Batch Reactor), and it has that technology is simple, operational management is flexible, anti impulsion load is strong, floor space is little and advantage such as difficult generation sludge bulking.SBR technology is because its flexible control on working time, is easy to realize the alternate environment of aerobic, anoxic and anaerobic state, for it realizes that denitrogenation dephosphorizing provides advantageous conditions.
In China, the research of SBR technology be applied in sewage treatment area and obtained gratifying achievement, and since sewage treatment process the unloading phase have to sludge concentration, reaction times, temperature and other conditional requests than higher the only selection of culturing sludge unloading phase that SBR technology becoming sewage treatment process.
Summary of the invention
Characteristic in big quantity research denitrification phosphorus-collecting microorganism and aerobic nitrification biofilm microorganisms, determine that two kinds of microorganisms are to the temperature of the requirement of influent quality, best SRT, suitable growth, corresponding parameters such as ORP, DO concentration and pH value Changing Pattern, rationally formulate and cultivate operation scheme, improve on the basis of culture efficiency, when systematically research started operation with solution continuous flow double sludge denitrification dephosphorization process, the system that can influence started every operating parameter of back two kinds of microorganism growth and system's dephosphorization and denitrification effect.The domestication of denitrification phosphorus-collecting microorganism and aerobic nitrification biofilm microorganisms is cultivated finish and inject the continuous flow double sludge denitrification dephosphorization process and start when moving, can be according to the characteristics of water inlet pollutent, in time take corresponding measure, change with adjusting amount of inlet water, temperature, sludge age (SRT) neatly, surmount parameters such as mud and returned sluge reflux ratio, and real-time change and electron microscope observation microbe species by ORP, DO concentration and pH value etc., hold the growing state of denitrification phosphorus-collecting microorganism and aerobic nitrification biofilm microorganisms exactly.
The technological line of present patent application research and testing program can be divided into following three steps:
(1) on the basis of testing and summing up domestic and international correlation theory in a large number, determine to cultivate the preferred plan of denitrification phosphorus-collecting microorganism, the phosphorus sludge (wherein containing a large amount of polyP bacterias) that removes of inoculating certain sewage work divides two stages to carry out in the sbr reactor device of appropriate volume.Fs, take the mode intermittent operation of A/O (aerobic/anaerobic), purpose is the enrichment polyP bacteria, eliminates other Pseudomonas.Subordinate phase adopts the mode of A/A (anaerobic/anoxic) to move, and purpose is that enrichment utilizes the denitrification phosphorus-collecting bacterium of nitric nitrogen for electron acceptor(EA).Regularly detect influent quality and microorganism and release, inhale the phosphorus situation, in time adjust operating parameter according to these data then, as: cause the anaerobic phosphorus release amount after a little while when water inlet COD is low, can suitably add the additional COD of carbon source such as glucose; When the pH value departs from setting range, can suitably add acid or alkali is mediated.When mud has good denitrifying phosphorus uptake effect (it is generally acknowledged that dephosphorizing rate reaches more than 85%), illustrate that the denitrification phosphorus-collecting bacterium has had good anoxic and inhaled the phosphorus function.By this training method, for the denitrification phosphorus-collecting microorganism provides best growing environment, it is ripe that it was cultivated in the shortest time.
(2) when cultivating the denitrification phosphorus-collecting microorganism, in another sbr reactor device, set about the biomembranous cultivation of aerobic nitrification.Add sanitary sewage and be rich in aerobic nitrification microbic activity mud in the carbon fiber filler bigger with specific surface area is the sbr reactor device of carrier, take intermittent water inflow, the mode of spoil disposal is cultivated fast.The aerobic nitrification microorganism has the long characteristics of sludge age, so must set longlyer reaction time.Regularly detect Inlet and outlet water water quality and use the microscopic examination biophase, in time adjust operation condition.Can be by in water inlet, adding NH
4Cl, glucose or add water adjust the water inlet NH
4 +-N concentration and COD etc. can in time understand population and the upgrowth situation of microorganism on the microbial film simultaneously by electron microscope.Work as NH
4 +The clearance of-N reaches about 90% and when filling surface has formed the microbial film flco that can observe with the naked eye of one deck densification, thinks that the aerobic nitrification microbial film is cultivated to finish.The environment that is provided in the sbr reactor device is all set according to the condition that helps the aerobic nitrification microorganism growth, and its that can make cultivated with the fastest speed and finished.
(3) treat two kinds of microorganism culturing maturations after, together inject the continuous flow double sludge denitrification dephosphorization system and move continuously.This stage is the most important, will guarantee that not only two kinds of microorganisms adapt to new growing environment continued growth, and two kinds of microorganisms are cooperatively interacted, and the nitric nitrogen that the denitrification phosphorus-collecting bacterium can make full use of the generation of aerobic nitrification biofilm system carries out denitrifying phosphorus uptake.At this moment the requirement for influent quality will take into account two kinds of microbial growth characteristics, and flooding velocity should be first little back big, makes microorganism adapt to new growing environment gradually.Because nitric nitrogen goes out the water-content less stable between the starting period, release phosphorus for avoiding a large amount of nitric nitrogens to be back to the anaerobic pond influence, the returned sluge reflux ratio should be controlled at lower level, but can guarantee that anoxic pond has enough sludge concentrations, for the consideration of balance, surmount return sludge ratio and should transfer in the suitable level of returned sluge reflux ratio.When system reached stability and high efficiency to the removal of nitrogen phosphorus, expression continuous flow double sludge denitrification dephosphorization system starts to be finished.
SBR is used for the method that the continuous flow double sludge denitrification dephosphorization process starts fast, it is characterized in that, earlier intermittently independent denitrification phosphorus-collecting mud in the continuous flow double sludge denitrification dephosphorization process and the microbial film in the continuous flow double sludge technology microbial film nitrification tank cultivated, after denitrification phosphorus-collecting mud and aerobic nitrification microbial film are put into the continuous flow double sludge system;
Wherein the cultivation of denitrification phosphorus-collecting mud divides two stages successively to carry out in the sbr reactor device: the 1st stage was cultivated aerobic polyP bacteria, and the 2nd stage was cultivated the denitrification phosphorus-collecting bacterium;
Cultured denitrification phosphorus-collecting mud is injected anaerobic pond, anoxic pond and rearmounted aeration tank fast respectively, make and to add sludge concentration MLSS behind the water at 3～4g/L, simultaneously cultured microbial film is put into the microbial film digester, to intake with peristaltic pump subsequently and squeeze into anaerobic pond from water tank, utilize the organism in the environment to synthesize intravital PHB at this denitrification phosphorus-collecting mud, and discharge a large amount of phosphorus; Mixed solution is behind the sharp separation of intermediate sedimentation pond, and supernatant liquor enters microbial film nitrification tank, NH there
4 +-N is oxidized to NO by the aerobic nitrification bacterium
3 --N enters anoxic pond and the mud that precipitates surmounts nitrated biofilm reactor, and denitrification phosphorus-collecting mud is electron donor with intravital PHB, the NO that provides with nitrification tank
3 --N is an electron acceptor(EA), finishes denitrification denitrogenation and the effect of excessive suction phosphorus; Afterwards, mixed solution together enters rearmounted aeration tank fast, and polyP bacteria utilizes the effect of aerobic suction phosphorus to absorb remaining phosphorus; At last, mixed solution is through the final deposition pool mud-water separation, and supernatant liquor is discharged, and part mud is back to anaerobic pond, and excess sludge is excluded system;
Operating parameter between the continuous flow double sludge denitrification dephosphorization system starting period is: water inlet COD, NH
4 +-N, PO
4 3--P concentration and pH value are controlled at respectively: 250～300mg/L, 45～55mg/L, 4～6mg/L and 6.5～7.5; The operation flow of water inlet is 45～48L/d; Sludge System MLSS is controlled at 3～4g/L; Microbial film nitrification tank and the rearmounted dissolved oxygen of aeration tank fast are controlled at 4～5mg/L and 1～2mg/L respectively; Control the returned sluge reflux ratio and surmount return sludge ratio and be: 30%, temperature is controlled at 22～25 ℃ between the starting period.
The cultivation of described denitrification phosphorus-collecting bacterium adopts the mode of anaerobic/anoxic to move: anaerobism stirs 4h in the sbr reactor device, the nitric nitrogen that adds 10～15mg/L then, anoxia stirring 3h, sedimentation and drawing 30min, move 2～3 cycles every day, when dephosphorizing rate reaches more than 85%, denitrification phosphorus-collecting is cultivated successfully by bacterium.
The beneficial effect of the invention
Under the situation that current body eutrophication problem more and more worsens, not only rest on organic degraded in the sewage for the sewage disposal level, and more pay attention to the removal of N, P, how effectively to improve the dephosphorization and denitrification effect of sewage disposal, reduction working cost, saving carbon source, minimizing sludge yield are only the problem that sewage treatment area is paid close attention to the most.The dephosphorization process of present wastewater treatment in China factory, major part all adopts traditional anaerobic phosphorus release, and the mode of aerobic suction phosphorus not only need to provide aerator and carbon source to increase working cost, and sludge yield is also bigger.And the continuous flow double sludge denitrification dephosphorization process has and saves carbon source and aeration rate, advantage that sludge yield is few, is very suitable for efficient energy-saving, continuable requirement.
The continuous flow double sludge denitrification dephosphorization process is started late, the continuous flow double sludge denitrification dephosphorization process all there is further investigation at home and abroad at present, external also have the continuous flow double sludge denitrification dephosphorization process is applied to example in the actual sewage treatment project, but the continuous flow double sludge denitrification dephosphorization process also not have the report that uses in China's Sewage Plant.Along with and technical study theoretical to denitrification dephosphorization further deeply and people to the understanding gradually of continuous flow double sludge denitrification dephosphorization process, this new and effective sewage treatment process will progressively be accepted and apply to put into practice by China people.
So, how to realize the stability and high efficiency of continuous flow double sludge denitrification dephosphorization process better, its operation startup problem becomes the key that at first will solve.The continuous flow double sludge denitrification dephosphorization process has two and overlaps independently sludge system, and its Starting mode is inevitable different with the Starting mode of traditional technology so.If adopt traditional mode that directly in continuous flow reactor, starts, then can not take into account two kinds of microbial growth characteristics, certainly will prolong start time.Therefore, this independent earlier cultivate denitrification phosphorus-collecting microorganism and aerobic nitrification biofilm microorganisms, and then with two kinds of continuous Starting mode of moving of microorganisms injection continuous flow double sludge denitrification dephosphorization systems, be based upon just and design on the basis of uniqueness of continuous flow double sludge denitrification dephosphorization process, can make continuous flow double sludge denitrification dephosphorization process dephosphorization and denitrification effect realize stability and high efficiency when starting reactor very fast.Require today in vogue at efficient energy-saving, this Starting mode has important significance for theories and realistic meaning for further promotion continuous flow double sludge denitrification dephosphorization process in actual application in engineering.
Description of drawings
Fig. 1 continuous flow double sludge denitrification dephosphorization system schema
1 water tank, 6 anoxic pond, 11 aerobic nitrification ponds
2 anaerobic ponds, 7 rearmounted aeration tank 12 peristaltic pumps fast
3 stir 8 air compressor, 13 medium sediment pools
4 transmitters and indicating meter 9 final deposition pools
5 under meters, 10 aeration heads
Embodiment
SBR is used for the start-up course that method that the continuous flow double sludge denitrification dephosphorization process starts fast can be used for preparing adopting the testing apparatus of the sewage work of double sludge denitrification dephosphorization process or research double sludge denitrification dephosphorization process.Its embodiment is:
At first, the phosphorus sludge that removes of inoculating certain sewage work divides two stages to carry out in the sbr reactor device of appropriate volume.In the 1st stage, take the mode intermittent operation of A/O (aerobic/anaerobic).In the sbr reactor device, add kind of mud and sanitary sewage, anaerobism stirs 4h, aeration 3h then, sedimentation and drawing 30min moves 3 cycles every day, and mixed solution DO (dissolved oxygen) is controlled at: 2～5mg/L.When the clearance of phosphorus reaches 85% when above, prove that aerobic polyP bacteria cultivated maturation, the 2nd stage was cultivated the denitrification phosphorus-collecting bacterium immediately.In the 2nd stage, adopt the mode of A/A (anaerobic/anoxic) to move.Anaerobism stirs 4h in the sbr reactor device, adds a certain amount of nitric nitrogen then and (is generally KNO
3), anoxia stirring 3h, sedimentation and drawing 30min moves 3 cycles every day.When dephosphorizing rate reaches stability and high efficiency, illustrate that the denitrification phosphorus-collecting bacterium also cultivates success.In the test, regularly detect influent quality and microorganism and release, inhale the phosphorus situation, in time adjust operating parameter according to these data then, as: cause the anaerobic phosphorus release amount after a little while when water inlet COD is low, can suitably add the additional COD of carbon source such as glucose; When the pH value departs from setting range, can suitably add acid or alkali is mediated.General water inlet COD is controlled at: 250～300mg/L, PO
4 3--P concentration is controlled at: 4～6mg/L, and the pH value is controlled at: 7～8; The MLSS of two stage intra-tank mixed liquors (sludge concentration) is controlled at: 3.5～4g/L, temperature is controlled at: 22～25 ℃.
When cultivating the denitrification phosphorus-collecting microorganism, in the sbr reactor device that another carbon fiber filler bigger with specific surface area is a carrier, add sanitary sewage and be rich in aerobic nitrification microbic activity mud, take intermittent water inflow, the mode of spoil disposal is cultivated the aerobic nitrification microbial film fast.Temperature is controlled at 25 ℃, and dissolved oxygen is 5～6mg/L, and sludge concentration is about 3.5g/L, moves 2 cycles every day, each cycle 12h.Regularly detect Inlet and outlet water water quality and use the microscopic examination biophase, in time adjust operation condition.Can be by in water inlet, adding NH
4Cl, glucose or add water adjust the water inlet NH
4 +-N concentration and COD etc. can in time understand population and the upgrowth situation of microorganism on the microbial film simultaneously by electron microscope.General water inlet COD and NH
4 +-N concentration is controlled at: 250～300mg/L and 45～55mg/L, water inlet pH value is controlled at: 6.5～7.5.Work as NH
4 +The clearance of-N reaches about 90% and when filling surface has formed the microbial film flco that can observe with the naked eye of one deck densification, thinks that the aerobic nitrification microbial film is cultivated to finish.
After treating two kinds of microorganism culturing maturations, together inject the continuous flow double sludge denitrification dephosphorization system and move continuously.Cultured denitrification phosphorus-collecting mud is injected anaerobic pond, anoxic pond and rearmounted aeration tank fast respectively, make and to add MLSS behind the water at 3～4g/L, simultaneously cultured microbial film is put into the microbial film digester, subsequently with peristaltic pump will intake (sanitary sewage) squeeze into anaerobic pond from water tank, utilize the organism in the environment to synthesize intravital PHB at this denitrification phosphorus-collecting mud, and discharge a large amount of phosphorus.Mixed solution is behind the sharp separation of intermediate sedimentation pond, and supernatant liquor enters microbial film nitrification tank, NH there
4 +-N is oxidized to NO by the aerobic nitrification bacterium
3 --N enters anoxic pond and the mud that precipitates surmounts nitrated biofilm reactor, and denitrification phosphorus-collecting mud is electron donor with intravital PHB, the NO that provides with nitrification tank
3 --N is an electron acceptor(EA), finishes denitrification denitrogenation and the effect of excessive suction phosphorus.Afterwards, mixed solution together enters rearmounted aeration tank fast, and polyP bacteria utilizes the effect of aerobic suction phosphorus to absorb remaining phosphorus.At last, mixed solution is through the final deposition pool mud-water separation, and supernatant liquor is discharged, and part mud is back to anaerobic pond, and excess sludge is excluded system.
Operating parameter between the continuous flow double sludge denitrification dephosphorization system starting period is: water inlet COD, NH
4 +-N, PO
4 3--P concentration and pH value are controlled at respectively: 250～300mg/L, 45～55mg/L, 4～6mg/L and 6.5～7.5.The operation flow of reactor is 45～48L/d; Sludge System MLSS is controlled at 3～4g/L; Microbial film nitrification tank and the rearmounted dissolved oxygen of aeration tank fast are controlled at 4～5mg/L and 1～2mg/L respectively; Control the returned sluge reflux ratio and surmount return sludge ratio and be: 30%, temperature is controlled at 22～25 ℃ between the starting period.When system reached stability and high efficiency to the removal of nitrogen phosphorus, expression continuous flow double sludge denitrification dephosphorization system starts to be finished.
With Beijing university life district sewage (pH=6.95～7.45, COD=201～358mg/L, NH
4 +-N=42.13～68.98mg/L, TN=54～73mg/L, TP=3.68～9.32mg/L) is an example for former water between the starting period.Cultivating denitrification phosphorus-collecting mud and the selected sbr reactor device useful volume of aerobic nitrification microbial film is 12L, and each operating parameter and influent quality are all regulated according to the method described above in the reaction process.In the 1st stage of denitrification phosphorus-collecting culturing sludge, through the cultivation of 12d, mud is increased to more than 95% by 73.3% the clearance of phosphorus, proves that aerobic suction phosphorus sludge has been cultivated to finish.In the 2nd stage, through the cultivation domestication of 20d, the anoxic dephosphorization rate of mud rises to more than 90% by 22.6%, proves that denitrification phosphorus-collecting mud has had good anoxic and inhaled the phosphorus function.The biomembranous culturing process of aerobic nitrification has experienced 30d, and carbon fiber surface has formed the microbial film of one deck densification, and NH
4 +The clearance of-N reaches and is stabilized in more than 95%, proves the rationally efficient of this training method.After two kinds of microorganism culturing maturations, inject the continuous flow double sludge system together, through the startup of 22d, COD, NH
4 +-N and PO
4 3-The clearance of-P is by initial about 85%, 85% and 75%, raises and is stabilized to final about 90%, 95% and 95%.
Easily spend time several months with respect to the Starting mode of traditional direct Continuous Cultivation and just can reach stable, the continuous flow double sludge denitrification dephosphorization system starts success and realizes stability and high efficiency through 54d, and the application in Practical Project has important theory significance and realistic meaning for further promotion continuous flow double sludge denitrification dephosphorization process.
Claims (2)
1.SBR be used for the method that the continuous flow double sludge denitrification dephosphorization process starts fast, it is characterized in that, earlier intermittently independent denitrification phosphorus-collecting mud in the continuous flow double sludge denitrification dephosphorization process and the aerobic nitrification microbial film in the continuous flow double sludge denitrification dephosphorization process microbial film nitrification tank cultivated, after denitrification phosphorus-collecting mud and aerobic nitrification microbial film are put into the continuous flow double sludge denitrification dephosphorization system;
The phosphorus sludge that removes of inoculation sewage work divides two stages to carry out in the sbr reactor device: the 1st stage, take the mode intermittent operation of aerobic/anaerobic, and purpose is the aerobic polyP bacteria of enrichment; The 2nd stage adopted the mode of anaerobic/anoxic to move immediately, and purpose is the gathering denitrifying polyP bacteria, when the clearance of phosphorus reaches 85% when above, illustrated that the denitrification phosphorus-collecting bacterium cultivates successfully;
Cultured denitrification phosphorus-collecting mud is injected anaerobic pond, anoxic pond and rearmounted aeration tank fast respectively, make and to add sludge concentration MLSS behind the water at 3～4g/L, simultaneously cultured aerobic nitrification microbial film is put into the microbial film nitrification tank, to intake with peristaltic pump subsequently and squeeze into anaerobic pond from water tank, utilize the organism in the environment to synthesize intravital PHB at this denitrification phosphorus-collecting mud, and discharge a large amount of phosphorus; Mixed solution is behind the sharp separation of intermediate sedimentation pond, and supernatant liquor enters microbial film nitrification tank, NH there
4 +-N is oxidized to NO by the aerobic nitrification bacterium
3 --N enters anoxic pond and the mud that precipitates surmounts the microbial film nitrification tank, and denitrification phosphorus-collecting mud is electron donor with intravital PHB, the NO that provides with the microbial film nitrification tank
3 --N is an electron acceptor(EA), finishes denitrification denitrogenation and the effect of excessive suction phosphorus; Afterwards, mixed solution together enters rearmounted aeration tank fast, and polyP bacteria utilizes the effect of aerobic suction phosphorus to absorb remaining phosphorus; At last, mixed solution is through the final deposition pool mud-water separation, and supernatant liquor is discharged, and part mud is back to anaerobic pond, and excess sludge is exhausted from system;
Operating parameter between the continuous flow double sludge denitrification dephosphorization system starting period is: water inlet COD, NH
4 +-N, PO
4 3--P concentration and pH value are controlled at respectively: 250～300mg/L, 45～55mg/L, 4～6mg/L and 6.5～7.5; The operation flow of water inlet is 45～48L/d; Continuous flow double sludge denitrification dephosphorization sludge system MLSS is controlled at 3～4g/L; Microbial film nitrification tank and the rearmounted dissolved oxygen of aeration tank fast are controlled at 4～5mg/L and 1～2mg/L respectively; Control the returned sluge reflux ratio and surmount return sludge ratio and be: 30%, temperature is controlled at 22～25 ℃ between the starting period.
2. according to the method for the described quick startup of claim 1, it is characterized in that: the cultivation of described denitrification phosphorus-collecting bacterium adopts the mode of anaerobic/anoxic to move: anaerobism stirs 4h in the sbr reactor device, the nitric nitrogen that adds 10～15mg/L then, anoxia stirring 3h, sedimentation and drawing 30min, move 2～3 cycles every day, when dephosphorizing rate reaches more than 85%, denitrification phosphorus-collecting is cultivated successfully by bacterium.
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| CN102531161A (en) * | 2010-12-13 | 2012-07-04 | 中国科学院城市环境研究所 | Rapid enrichment reaction device for denitrifying phosphorus removing bacteria |
| CN102358663A (en) * | 2011-09-21 | 2012-02-22 | 浙江大学 | Low-DO (dissolved oxygen) rear denitrification sewage treatment plant and technique |
| CN103011520B (en) * | 2012-12-23 | 2013-11-06 | 北京工业大学 | Method for starting A2N two-stage SBR denitrifying phosphorus removal |
| CN103773726A (en) * | 2014-02-09 | 2014-05-07 | 安徽科技学院 | Method for enriching and acclimating denitrifying phosphate-accumulating organisms at low temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948177A (en) * | 2010-10-13 | 2011-01-19 | 武汉大学 | Method for enriching denitrifying phosphorus removal bacteria in continuous flow reactor |
| CN101948177B (en) * | 2010-10-13 | 2011-12-28 | 武汉大学 | Method for enriching denitrifying phosphorus removal bacteria in continuous flow reactor |
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