CN101054236A - Denitrogenation method for nitrosation-anaerobic ammoxidation single stage organism - Google Patents
Denitrogenation method for nitrosation-anaerobic ammoxidation single stage organism Download PDFInfo
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Abstract
The invention discloses a nitrosation-anaerobic ammonoxidation single-stage biological denitrification method, the technology utilizes nitrosation flora with intensified active carbon as core after adding powdery active carbon and anaerobic ammonoxidation flora to generate composite granule sludge, and couples two reactions of nitrosation reaction and anaerobic ammonoxidation reaction, realizes biological denitrification reaction for transforming ammonia nitrogen into nitrogen in macrography. The invention is operated in one reactor at normal temperature without need of heating preprocessing waste water, saves energy, needs small accommodation area and reduces free nitrous cumulant of free nitrite to resist ammonia nitrogen with higher concentration. The invention adds powdery active carbon to form intensified granule sludge and self-cultures suspended sludge, thereby simplifying startup and running of the technology.
Description
Technical field
The invention belongs to the biological wastewater treatment field, relate to utilize nitrosification flora and Anammox flora granulating mud handle in the method for lower concentration ammonia-containing water.
Background technology
Hunan University discloses a kind of temperature and restricted aeration mode of high frequency aeration-anoxic alternative by sewage in the control reaction vessel in real time and has realized that the nitrosification Anammox reacts in the application number of on August 29th, 2006 application is the prospectus of 200610032147 " short distance nitration-anaerobic ammoxidation sequencing batch biofilm denitrification operation mode and device ", four water inlets are carried out in a circulation, aeration, the anoxic stage, this technology will be carried out pre-treatment to sewage, need the water inlet water temperature is heated to 26 ~ 33 ℃, will keep temperature in the reactor between 28 ~ 33 ℃ in the operation phase, dissolved oxygen concentration is controlled at 1.1～1.5mg/L.Dalian University of Technology is openly can a kind of nonwoven fabric rotating bio-disc reactor in " nonwoven fabric rotating bio-disc reactor of nitrifying anaerobic ammonia oxidation process simultaneously " prospectus of 200610047605 at the application number of on August 30th, 2006 application, in this reactor, by the controlling reactor median water level, the biology dish disc of rotation is alternately contacted with air with waste water, be implemented in and realize nitrosification and Anammox in the same reactor.But the technology in above two patent applications all is based on biomembranous reactor, all will carry out heat treated to the waste water in the reflecting device simultaneously, and strict control dissolved oxygen concentration.Increase energy consumption, be not easy to the control of technology.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of denitrogenation method for nitrosation-anaerobic ammoxidation single stage organism, need not waste water is carried out heat pre-treatment, in single reaction vessel, realize nitrosification, Anammox reaction on the macroscopic view simultaneously.
Utilization of the present invention add behind the powdered active carbon to strengthen what form be the nitrosification flora of core and the symbiosis composite particles mud of Anammox flora two class floras with the gac, with and the coupling of the nitrosation reaction that takes place and two kinds of reactions of Anammox reaction, realized that on macroscopic view the biological denitrificaion that ammonia nitrogen is converted into nitrogen reacts.
Technology of the present invention comprises granular sludge, reactor start-up, reactor operation three phases:
(1), the granular sludge stage: at first will add nitrosification mud and Anammox mud to be tamed in the reaction unit, add powdered active carbon, and to add actual waste water and tap water ratio be that 1: 2 composite waste is to the water outlet place of reaction unit, sludge concentration in the assurance reaction unit reaches 3 ~ 4g/L. and treats that sludge settling is to the bottom of reactor, with the bottom air inlet of air pump from reaction unit reactor is carried out aeration aerating, with lower flooding velocity the lower water inlet of composite waste from reaction unit pumped into simultaneously, in reactor internal recycle flow process, Powdered Activated Carbon fully contacts with nitrosification mud and Anammox mud, under the effect of hydraulic shear, the comparatively loose sludge blanket in flco group top layer begins to come off, and the comparatively closely knit biostrome of structure is retained, and having formed under long-time running is the nitrococcus and the symbiotic composite particles mud of Anammox of core with the gac;
(2), the reactor start-up stage: the unloading phase initial stage, because nitrosation-anaerobic ammoxidation symbiosis granule sludge need carry out adaptive growth metabolism process to the various matrix in the water inlet, can produce the lag phase of certain hour, but continuous operation along with reaction, the activity of nitrococcus at first is restored, with the dissolved oxygen in the mixed solution is electron acceptor(EA), ammonia nitrogen is oxidized to nitrite nitrogen, nitrite nitrogen concentration in the mixed solution begins to rise, the anaerobic ammonia oxidizing bacteria that is wrapped is in the microbial environment of low dissolved axygen, activity begins to recover, the ammonia and the nitrite that utilize diffusion to come in carry out the Anammox reaction, generate nitrogen, reach the purpose of denitrogenation.When the nitrogen removal rate of reactor begins constantly to raise, progressively increase the ratio of ammonia-containing water in water inlet, reach 100% until ratio, thereby finished the start-up course of nitrosation-anaerobic ammoxidation symbiosis denitrification reaction;
(3), the operation phase: reaction unit adopts the mode of operation continuously, and waste water is continuously pumped into from the middle and lower part of reactor, and water outlet is flowed out from overflow port continuously, and reaction maintains stable status.
The present invention is at compound mud granule generation phase, and the dosing ratio of Powdered Activated Carbon required for the present invention is controlled at 1 ~ 3%, and gas-water ratio is 80 ~ 110m
3(air)/m
3(water), organic concentration are COD=100 ~ 200mg/L, and sludge age SRT is more than or equal to 100d, and dissolved oxygen concentration is DO＜0.1mg/L.
Temperature 18 ~ 26C of operation phase of the present invention, pH7.5 ~ 8.5, DO＜0.5mg/L, hydraulic detention time 3 ~ 24h, MLSS=3000 ~ 4000mg/L.
The present invention has found the granulating new bio denitride technology of the realistic application of a kind of energy; reaction operation at normal temperatures; do not require the level that reaches very low for The Control of Dissolved Oxygen; the present invention directly starts operation with suspended sludge, and reduce start time, and in the inner circulation reactor; gas-liquid operation relatively is violent; the gas-liquid mass transfer resistance reduces, and can reach higher total nitrogen and remove load and short hydraulic detention time.The present invention can make the semi-invariant of the free nitrous acid in the reactor maintain lower level, thereby can tolerate the greater concn influent ammonia nitrogen by the symbiosis denitrogenation of nitrococcus and anaerobic ammonia oxidizing bacteria.The formation that adds powdered activated charcoal strengthened granule sludge that the present invention realized need not to inoculate in advance anaerobic grain sludge or denitrification granular sludge, but adopts suspended state mud to carry out from cultivation, thereby the startup of technology operation obtains simplifying.And granule sludge of the present invention forms under higher flow shear, and is comparatively closely knit, particle integrity, thus improved the adaptability and the stability of technology.
Embodiment:
1, the granular sludge stage:
The formation condition of granule sludge:
The culturing process of granule sludge in fact also is the process that microecosystem forms, and the variation of culture condition directly has influence on structure and the distribution of forming the aerobic particle mud micropopulation, comprises that it forms the reconstruct of superior microorganism from the value volume and range of product.Therefore can realize the post-directed training of aerobic particle mud by the suitable condition of control.
The dosing ratio of powder art gac:
Adding of Powdered Activated Carbon becomes the induction factor that granule sludge forms.If there is not the existence of inorganic particle material in the mixed solution, the difficult granule sludge that forms structural integrity, and can only exist with the form of mud flco.The dosing ratio of Powdered Activated Carbon required for the present invention is controlled at 1 ~ 3%, and the quality that promptly adds Powdered Activated Carbon accounts for 1 ~ 3% of active sludge in the reactor.
Gas-water ratio:
Flow shear is the power that granule sludge forms, granule sludge physical strength, stability, with reactor in flow shear direct relation is arranged.Flow shear is that surperficial up-flow gas speed is caused in the aeration process, and the flow shear of the big more generation of surperficial up-flow gas speed is also big more.Under the certain situation of load, the variation of flow shear can cause granule sludge directly to change.In proper range, higher flow shear can form the less and comparatively closely knit granule sludge of particle diameter.Rise by air in the gas extracting reactor and forms the power of circulation eddy flow, kept flow shear higher in the mixed solution, so formed granule sludge particle diameter is less, but structure is closely knit.Reactor is in service can be with the air water size of secondary indication flow shear recently, the present invention adopts perforated pipe aerating regulation, the gas-water ratio of being controlled is 80 ~ 110m
3(air)/m
3(water).
Organic concentration (COD):
Contain certain density organism in the water inlet, make the heterotrophism bacterial classification that tolerance is stronger under the low dissolved axygen condition in reactor, to survive, particularly the appropriateness of thread fungus etc. exists and makes that the associativity of flco of mud is stronger, make the coherency and the settleability of mud strengthen, help the formation of granule sludge.But too high organic concentration can cause the hypertrophy of heterotrophic bacterium, thereby to the nitrococcus and the inhibition of competing property of anaerobic ammonia oxidizing bacteria of autotrophy, is unfavorable for the steady running of denitrification reaction.The organic concentration of the present invention's control is: COD=100 ~ 200mg/L.
Sludge age (SRT):
Controlling reactor of the present invention operates under the overlength sludge age, do not carry out artificial initiatively spoil disposal, make all kinds bacterium that exists in the reactor can both obtain holding and stay to a certain degree, help cell and in reactor, realize variation, thereby can carry out polytype reaction.SRT is more than or equal to 100d in control.
Dissolved oxygen (DO):
Under the low dissolved axygen condition, help to form the symbiotic granule sludge of aerobic-anaerobic bacterium.Lower dissolved oxygen can make the Anammox reaction zone of granule interior maintain bigger scope, thereby the denitrification reaction ability is strengthened.The low dissolved axygen concentration that the present invention controlled is DO＜0.1mg/L.
At first nitrosification mud and Anammox mud to be tamed will be added in the reaction unit, by dosing ratio is 1 ~ 3% to add powdered active carbon, and to add actual waste water and tap water ratio be that 1: 2 composite waste is to the water outlet place of reaction unit, sludge concentration in the assurance reaction unit reaches 3 ~ 4g/L. and treats that sludge settling is to the bottom of reactor, with the bottom air inlet of air pump from reaction unit reactor is carried out aeration aerating, with lower flooding velocity the lower water inlet of composite waste from reaction unit pumped into simultaneously.Air rises in the reactor center tube, and the density of carrying Air mixing liquid secretly descends, and upwards flows, and carries out gas-water separation in the bigger central tube of reactor head, and the density of mixed solution increases, and flows downward in sedimentation pipe, flows thereby produce internal recycle.In the internal recycle flow process, Powdered Activated Carbon fully contacts with nitrosification mud and Anammox mud, nitrococcus is given birth to and bigger propagation at first occurred, and nitrococcus is more for the dissolved oxygen depletion that aeration charges in the mixed solution, makes the dissolved oxygen levels of reactor constantly descend.Because the matrix in the reactor is abundant at this moment, the oxygen supply abundance, make nitrococcus be in the increased logarithmic phase of growth and breeding, the growth metabolism of nitrococcus secretes more sticky product, make that nitrococcus is core with the gac, constantly bond together, form flco group, simultaneously also wherein downtrod anaerobic ammonia oxidizing bacteria parcel.Nitrococcus is an electron acceptor(EA) with the dissolved oxygen in the mixed solution, ammonia nitrogen is oxidized to nitrite nitrogen, nitrite nitrogen concentration begins to rise in the mixed solution, has formed concentration gradient inside and outside the cenobium of nitrosation-anaerobic ammoxidation symbiote, and nitrite begins to the symbiote internal divergence.The anaerobic ammonia oxidizing bacteria that is wrapped is in the microbial environment of low dissolved axygen, and activity begins to recover, and the ammonia and the nitrite that begin to utilize diffusion to come in carry out the Anammox reaction, generate nitrogen, reach the purpose of denitrogenation.Under the effect of hydraulic shear, the comparatively loose sludge blanket in flco group top layer begins to come off, and the comparatively closely knit biostrome of structure is retained, and having formed under long-time running is the nitrococcus and the symbiotic composite particles mud of Anammox of core with the gac.
2, the reactor start-up stage:
The reactor of having inoculated nitrosation-anaerobic ammoxidation symbiosis granule sludge starts with low water inlet volumetric loading earlier, and after reaching control and requiring, raising influent load progressively is to satisfy the requirement to the water inlet denitrogenation.
Waste water contacts with nitrosation-anaerobic ammoxidation symbiosis mud thorough mixing, and the biochemical reaction of denitrogenation takes place under the acting in conjunction of nitrococcus and anaerobic ammonia oxidizing bacteria, and the ammonia nitrogen in the waste water is converted into nitrogen, thereby removes the nitrogen in the waste water.The unloading phase initial stage, because nitrosation-anaerobic ammoxidation symbiosis granule sludge need carry out adaptive growth metabolism process to the various matrix in the water inlet, can produce the lag phase of certain hour, the metaboilic level of microorganism maintains the lower stage, reactive behavior is not high, particularly anaerobic ammonia oxidizing bacteria is longer for the adaptive process of environment, and because the vigor of nitrococcus is not strong yet, make its consumption less for the dissolved oxygen in the mixed solution, higher level may appear in the dissolved oxygen of mixed solution, anaerobic ammonia oxidizing bacteria is exposed to the open air under higher dissolved oxygen environment thus, and reactive behavior further is suppressed.This makes that the denitrogenation level of reactor is not high.
But along with the continuous operation of reaction, the activity of nitrococcus at first is restored, and bigger propagation has appearred in bacterium, and nitrococcus is more for the dissolved oxygen depletion that aeration charges in the mixed solution, makes the dissolved oxygen levels of reactor constantly descend.Because the matrix in the reactor is abundant at this moment, the oxygen supply abundance, make nitrococcus be in the increased logarithmic phase of growth and breeding, the growth metabolism of nitrococcus secretes more sticky product, make nitrococcus constantly bond together, form flco, simultaneously also wherein with downtrod anaerobic ammonia oxidizing bacteria parcel.Nitrococcus is an electron acceptor(EA) with the dissolved oxygen in the mixed solution, ammonia nitrogen is oxidized to nitrite nitrogen, nitrite nitrogen concentration in the mixed solution begins to rise, and has formed concentration gradient inside and outside the cenobium of nitrosation-anaerobic ammoxidation symbiote, and nitrite begins to the symbiote internal divergence.The anaerobic ammonia oxidizing bacteria that is wrapped is in the microbial environment of low dissolved axygen, and activity begins to recover, and the ammonia and the nitrite that begin to utilize diffusion to come in carry out the Anammox reaction, generate nitrogen, reach the purpose of denitrogenation.Thus, begin to have produced nitrosation-anaerobic ammoxidation symbiosis reaction, nitrococcus utilizes the dissolved oxygen in the mixed solution to carry out nitrosation reaction, make the dissolved oxygen in the microenvironment of nitrosation-anaerobic ammoxidation symbiote drop to very low level, anaerobic ammonia oxidizing bacteria then utilizes ammonia and nitrite to carry out the Anammox reaction with this understanding, making nitrite concentration in the microenvironment of nitrosation-anaerobic ammoxidation symbiote maintain in certain scope no longer raises, thereby reduced of the inhibition influence of the free nitrous acid of too high nitrite concentration formation, kept the normal physiological activity of flora for nitrococcus and anaerobic ammonia oxidizing bacteria.Under the common metabolism of nitrococcus and anaerobic ammonia oxidizing bacteria, the biological denitrificaion reaction that ammonia nitrogen is converted into nitrogen oxygen has taken place on the macroscopic view.And in the macro environment of reactor, the mixed solution dissolved oxygen can continue below 0.5mg/L, and the nitrite concentration in the mixed solution maintains below the 10mg/L, and the clearance of total nitrogen constantly raises.
When the nitrogen removal rate of reactor begins constantly to raise, can progressively increase the ratio of ammonia-containing water in water inlet, reach 100% until ratio, thereby finished the start-up course of nitrosation-anaerobic ammoxidation symbiosis denitrification reaction.
3, the operation phase
Operational conditions of the present invention:
(1) present technique is fit to the ammonia nitrogen (concentration is less than 400mgN/L) that the waste water of processing is lower concentration in containing, and the organic content in the water (COD value) not high (concentration is less than 300mgCOD/L), water temperature reaches the waste water of normal temperature condition.
(2) reactor operates under the normal temperature condition, need not operations such as heating.In the normal temperature scope, temperature does not play a decisive role for the nitrosation-anaerobic ammoxidation coupling reaction, only plays the effect of quickening or slowing down.Usually, higher temperature can promote the carrying out that react.
(3) need not strict control for the dissolved oxygen in the water inlet.Contained suspended substance (SS) not too high (concentration is less than 100mg/L) in the water inlet is for operations such as the waste water than high suspended matter can precipitate in advance.
(4) the air inlet position of reactor is the bottom, and the form of air inlet can adopt forms such as perforated pipe, and keeping vapour-liquid ratio is 80 ~ 120m
3(air)/m
3(water).The water inlet position of reactor can be the bottom, also can be the sidewall of reactor multipoint water feeding.
(5) reactor is the operation scheme of continuous water-inlet continuous water-outlet.Under low water inlet volumetric loading, move, can adopt single newspaper gas extracting reactor, from the form of the direct water outlet in settling region on reactor top; Under higher water inlet volumetric loading condition, can adopt the two-stage reactor form, and increase the settling tank of water outlet, carry out the operation that mud refluxes.
(6) reactor that moves of present technique need not operations such as lucifuge, sealing.
Concrete operating parameter is: temperature 18 ~ 26C, and pH7.5 ~ 8.5, DO＜0.5mg/L, hydraulic detention time 3 ~ 24h,
MLSS＝3000~4000mg/L
Reaction unit adopts the mode of operation continuously, and waste water is continuously pumped into from the middle and lower part of reactor, and water outlet is flowed out from overflow port continuously, and reaction maintains stable status.In the normal reaction stage, the nitrogen removal rate in the water outlet reaches 80 ~ 85%, and ammonia nitrogen in the water outlet and nitrite nitrogen are very low, maintain below the 5mg/L.
In the normal operation phase, reactor can carry out single-stage operation and two-stage series connection operation according to the needs of handling waste water.Contain in waste water under the situation that ammonia nitrogen concentration is not too high or flooding quantity is lower, when promptly the influent ammonia nitrogen volumetric loading of reactor is low, can directly adopt the single-stage operational mode, the influent ammonia nitrogen volumetric loading of recommendation is at 0.9kgNH
4-N/m
3When d is following, adopt the operational mode of single-stage nitrosation-anaerobic ammoxidation symbiosis denitrification reaction.It is higher to contain ammonia nitrogen concentration in waste water, or under the bigger situation of flooding quantity, the nitrosation-anaerobic ammoxidation symbiosis denitrification reaction operational mode of the higher employing two-stage series connection of ammonia nitrogen volumetric loading of water inlet is handled, and the influent ammonia nitrogen volumetric loading that recommend this moment is at 0.9 ~ 3.0kgNH
4-N/m
3Between the d.And under the too high influent ammonia nitrogen volumetric loading situation, promptly greater than 3.0kgNH
4-N/m
3During d, then should take suitable pre-treatment measure, carry out nitrosation-anaerobic ammoxidation symbiosis denitrogenation processing again.
Under normal running (operation) conditions, reactor is not carried out artificial spoil disposal, only depend on the suspended substance that carries in the water outlet to reach and keep the stable purpose of sludge concentration in the reactor.Dissolved oxygen control for reactor is comparatively wide in range, as long as below 0.5mg/L, need not to reach the following anaerobic environment of 0.1mg/L.And control the size of aeration rate thus.
Embodiment 1:
Gas stripping inner circulation reactor with the denitrogenation of single-stage nitrosation-anaerobic ammoxidation symbiosis granulating sludge organism carries out biological denitrificaion processing experiment to sludge press filtration liquid.Concrete operations parameter: single-stage reactor useful volume 16.0L, wherein reaction zone is 14L, and the settling region is 2L, and sludge concentration is 4.5g/L in the reactor, temperature 20 ~ 26C, pH=7.5 ~ 8.2, average flooding velocity is 35.44L/d, the ammonia nitrogen mean concns is 352.67mg/L in the water inlet of sludge press filtration liquid, total nitrogen is 370.33mg/L, the ammonia nitrogen volumetric loading of water inlet is 0.78kg/m3d, and the total nitrogen volumetric loading of water inlet is 0.82kg/m3d, and average hydraulic detention time is 0.458d.The dissolved oxygen of reaction run duration is controlled at below the 0.5mg/L.Steady running 102d, the reaction normal operation period, the total nitrogen average removal rate is 81.04%, and the water outlet ammonia nitrogen is 0.07mg/L, and nitrite nitrogen is 3.56mg/L, nitrate nitrogen is 36.09mg/L, total nitrogen is 39.65mg/L, and pH is 7.44, and basicity is 386.35mg/L, the average removal load of ammonia nitrogen is 0.7327kg/m3d, and the average removal load of total nitrogen is 0.6613kg/m3d.At duration of test, denitrification reaction is stable, and serviceability is good.
(2) embodiment 2:
Sludge press filtration liquid is carried out the biological denitrificaion experiment of high loading with two-stage nitrosation-anaerobic ammoxidation symbiosis granulating mud denitrification reactor.Concrete operations parameter: A reactor useful volume 16.0L, second reactor useful volume 4.86L.Sludge concentration is 4.3g/L in the reactor, 20 ~ 26 ℃ of temperature, and average flooding velocity is 154.93L/d, hydraulic detention time is 0.104d.The ammonia nitrogen mean concns is 331.15mg/L in the water inlet of sludge press filtration liquid, and total average nitrogen concentration is 339.01mg/L, and the influent ammonia nitrogen volumetric loading is 3.2055kg/m
3D, total nitrogen volumetric loading are 3.2811kg/m
3D controls dissolved oxygen below 0.5mg/L, steady running 48d, the water outlet nitrogen removal rate is 79.60%, and water outlet ammonia nitrogen mean concns is 23.22mg/L, and the nitrite nitrogen concentration is 3.86mg/L, the nitrate nitrogen mean concns is 41.51mg/L, and total average nitrogen concentration is 68.59mg/L.Reactor steady running under high-load condition, though compare higherly among water outlet total nitrogen concentration and the embodiment 1, nitrogen removal rate can maintain higher level.
Claims (5)
1, a kind of nitrosification-anaerobic ammoxidation single stage biological denitrification method, it is characterized in that utilizing add behind the powdered active carbon to strengthen what form be the nitrosification flora of core and the symbiosis composite particles mud of Anammox flora two class floras with the gac, with and the nitrosation reaction that takes place and Anammox react the biological denitrificaion that being coupling in of two kinds of reactions realized on the macroscopic view that ammonia nitrogen is converted into nitrogen and react.
2, nitrosification according to claim 1-anaerobic ammoxidation single stage biological denitrification method is characterized in that this technology comprises granular sludge, reactor start-up, reactor operation three phases:
(1), the granular sludge stage: at first will add nitrosification mud and Anammox mud to be tamed in the reaction unit, add powdered active carbon, and to add actual waste water and tap water ratio be that 1: 2 composite waste is to the water outlet place of reaction unit, sludge concentration in the assurance reaction unit reaches 3～4g/L. and treats that sludge settling is to the bottom of reactor, with the bottom air inlet of air pump from reaction unit reactor is carried out aeration aerating, with lower flooding velocity the lower water inlet of composite waste from reaction unit pumped into simultaneously, in reactor internal recycle flow process, Powdered Activated Carbon fully contacts with nitrosification mud and Anammox mud, under the effect of hydraulic shear, the comparatively loose sludge blanket in flco group top layer begins to come off, and the comparatively closely knit biostrome of structure is retained, and having formed under long-time running is the nitrococcus and the symbiotic composite particles mud of Anammox of core with the gac;
(2), the reactor start-up stage: the unloading phase initial stage, because nitrosation-anaerobic ammoxidation symbiosis granule sludge need carry out adaptive growth metabolism process to the various matrix in the water inlet, can produce the lag phase of certain hour, but continuous operation along with reaction, the activity of nitrococcus at first is restored, with the dissolved oxygen in the mixed solution is electron acceptor(EA), ammonia nitrogen is oxidized to nitrite nitrogen, nitrite nitrogen concentration in the mixed solution begins to rise, the anaerobic ammonia oxidizing bacteria that is wrapped is in the microbial environment of low dissolved axygen, activity begins to recover, the ammonia and the nitrite that utilize diffusion to come in carry out the Anammox reaction, generate nitrogen, reach the purpose of denitrogenation.When the nitrogen removal rate of reactor begins constantly to raise, progressively increase the ratio of ammonia-containing water in water inlet, reach 100% until ratio, thereby finished the start-up course of nitrosation-anaerobic ammoxidation symbiosis denitrification reaction;
(3), the operation phase: reaction unit adopts the mode of operation continuously, and waste water is continuously pumped into from the middle and lower part of reactor, and water outlet is flowed out from overflow port continuously, and reaction maintains stable status.
3, nitrosification according to claim 2-anaerobic ammoxidation single stage biological denitrification method is characterized in that the dosing ratio of Powdered Activated Carbon required for the present invention is controlled at 1～3% at compound mud granule generation phase, and gas-water ratio is 80～110m
3(air)/m
3(water), organic concentration are COD=100～200mg/L, and sludge age SRT is more than or equal to 100d, and dissolved oxygen concentration is DO＜0.1mg/L.
4, according to claim 1,2 or 3 described arbitrary nitrosification-anaerobic ammoxidation single stage biological denitrification methods, temperature 18～the 26C that it is characterized in that the described operation phase, pH7.5～8.5, DO＜0.5mg/L, hydraulic detention time 3～24h, MLSS=3000～4000mg/L.
5, according to claim 1,2 or 3 described arbitrary nitrosification-anaerobic ammoxidation single stage biological denitrification methods, it is characterized in that under the higher water inlet volumetric loading condition, can adopt the two-stage reactor form, and increase the settling tank of water outlet, carry out the operation that mud refluxes.
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