CN105174630B - Low carbon-nitrogen ratio sewage denitrification dephosphorization system and method based on biotechnology - Google Patents
Low carbon-nitrogen ratio sewage denitrification dephosphorization system and method based on biotechnology Download PDFInfo
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Abstract
The present invention provides a kind of low carbon-nitrogen ratio sewage denitrification dephosphorization system and method based on biotechnology, including anaerobic pond, limit oxygen aeration tank, anoxic pond, aerobic aeration pond and the second pond being sequentially connected, the anaerobic pond connects inlet channel, the anaerobic pond is connected by surmounting pipeline with anoxic pond, the second pond is connected by reflux line with anaerobic pond, and the limit oxygen aeration tank and the aerobic aeration pond are connected with aerator.Using single sludge system gathering denitrifying polyP bacteria, so as to realize the dual-purpose technique of a carbon of denitrification phosphorus-collecting, save carbon source, and by controlling the dissolved oxygen amount of limit oxygen aeration tank to realize short distance nitration, then the process conditions coexisted in anoxic section construction short-cut denitrification and Anammox, this method is simple to operate, high treating effect, is the innovation of the art.
Description
Technical field
The present invention relates to sewage treatment area, more specifically to a kind of low carbon-nitrogen ratio sewage based on biotechnology
Denitrification dephosphorization system and method.
Background technology
Currently used in the method for biological carbon and phosphorous removal, the technological principle of comparative maturity is the anti-nitre of nitrification commonly used in engineering
Chemical industry skill, including A2O, multistage AO, various types oxidation ditch, SBR and its deformation technique, MUCT techniques and the anti-nitre of preposition internal carbon source
JHB techniques of change etc., easy, water stabilization that it is exactly clear principle that these techniques, which have a common advantage, operation controls, its
Theoretical foundation is the nitrification and denitrification effect of microorganism.But in the case of low ratio of carbon to ammonium, refer generally to the feelings that carbon-nitrogen ratio is less than 3
Condition, denitrogenation dephosphorizing can be extremely restricted, and generally require additional carbon strengthening biological carbon and phosphorous removal, including glucose, methanol, vinegar
The organic matters such as acid add, and considerably increase the processing cost of sewage.
And in the more technique of Recent study, including the dual-purpose denitrification phosphorus-collecting technique of a carbon, save aeration and carbon source
Short-cut nitrification and denitrification technique and do not need the anaerobic ammonia oxidation process of carbon source, it is dirty in each suitable low ratio of carbon to ammonium respectively
Play and act in water process, but all there is limitation.
Denitrification phosphorus-collecting technique is that the carbon source absorbed after phosphorus is released using Denitrifying Phosphate Accumulating Organisms, using nitrate nitrogen be electronics by
Body, instead of oxygen, carrying out denitrifying while completing biology suction phosphorus, the dual-purpose effect of a carbon is being played, so as to save carbon source
Consumption, but the technique generally requires double sludge systems to realize, and nitrification typically uses contact oxidation technology, can also use
Activated Sludge Process increase intermediate sedimentation pond, one sludge system of self-contained, the system only complete nitrification, and another sludge system
The denitrification phosphorus-collecting sludge after releasing phosphorus of uniting then directly surmounts to rearmounted anoxic section without aeration, the supernatant with completing nitrification
Liquid is acted on, and completes denitrification phosphorus-collecting reaction, due to needing strict technical process control and double sludge systems, technology controlling and process
Complexity, parameter is more, still runs successful Engineering Projects without discovery at home.
And short-cut nitrification and denitrification technique only can alleviate carbon source not to a certain extent when handling low carbon-nitrogen ratio sewage
Foot, and the risk that effluent quality deteriorates is easily caused when influent concentration fluctuates, therefore using few in sewage treatment project.
Anammox（anaerobic ammonium oxidation,ANAMMOX）Technique, it is a kind of new and effective life
Thing denitrification process, it is necessary to control section ammoxidation to the nitrite nitrogen stage, nitrite nitrogen enters with unoxidized ammonia on this basis
Row Anammox reacts, and nitrogen is directly generated, so as to realize the denitrogenation of no carbon source, but in a reaction tank in Practical Project
Half ammoxidation of interior control is extremely difficult, and especially the not high sanitary sewage disposal of ammonia nitrogen is not almost applied.
The content of the invention
The present invention is to solve drawbacks described above present in prior art and deficiency, there is provided a kind of based on biotechnology
Low carbon-nitrogen ratio sewage denitrification dephosphorization system and method, by controlling the residence time of anoxic section to realize anti-nitre under single sludge system
Change poly- phosphorus technique, and using ammonia oxidation bacteria and the saturation dissolved oxygen coefficient difference of nitrifier, by controlling dissolved oxygen amount and hydraulic retention
Time, the accumulation of nitrite nitrogen is realized in limit oxygen aeration section, the offer of ammonia nitrogen surmounts stream by the mixed liquor of anaerobism section to anoxic section, from
And anaerobic ammonoxidation bacterium concentrating is realized in longer anoxic section, so as to realize that Anammox reacts, this method is simple to operate, place
Reason effect is good, and process conditions can meet the growth conditions of ammonia oxidation bacteria, Denitrifying Phosphate Accumulating Organisms, anaerobic ammonia oxidizing bacteria simultaneously, is this
The once innovation of technical field.
In order to solve the above technical problems, the present invention provides a kind of low carbon-nitrogen ratio sewage denitrogenation dephosphorizing system based on biotechnology
System, including anaerobic pond, limit oxygen aeration tank, anoxic pond, aerobic aeration pond and the second pond being sequentially connected, the anaerobic pond connection
Inlet channel, the anaerobic pond are connected by surmounting pipeline with anoxic pond, and the second pond passes through reflux line and anaerobic pond
It is connected, the limit oxygen aeration tank and the aerobic aeration pond are connected with aerator；
The anaerobic pond is used for Denitrifying Phosphate Accumulating Organisms and utilizes carbon source material in sewage, realizes anaerobic phosphorus release, and by carbon source
Material is stored in vivo, for denitrification phosphorus-collecting and aerobic phosphorous accumulating；
By controlling dissolved oxygen amount and hydraulic detention time in the limit oxygen aeration tank, make the mixing after anaerobic pond is handled
Short distance nitration occurs for liquid, realizes the accumulation of nitrite nitrogen；
The anoxic pond receive limit oxygen aeration tank mixed liquor and anaerobic pond by surmount pipeline come surmount mixing
Liquid, realize following technique：
1) mixed liquor surmounted from anaerobism section, containing Denitrifying Phosphate Accumulating Organisms and itself carbon source, using from by limit oxygen aeration
The nitrite nitrogen and nitrate nitrogen in pond carry out denitrification phosphorus-collecting, make denitrification denitrogenation is synchronous with poly- phosphorus to carry out, realize denitrification phosphorus-collecting technique
The dual-purpose effect of a carbon；
2) limit the nitrite nitrogen of oxygen aeration tank accumulation and surmount the ammonia nitrogen compound of mixed liquor, be enriched with anaerobism in anoxic section jointly
Ammonia oxidation bacteria, so as to realize the carbon-free denitrogenation of anaerobic ammonia oxidation process；
In the aerobic aeration pond, ammonia oxidation bacteria and nitrifier using complete a small amount of ammonia nitrogen jointly to not carrying out aerobic nitrification
Reaction, while Denitrifying Phosphate Accumulating Organisms can carry out aerobic phosphorus absorption using the oxygen in air, further reduce water outlet total phosphorus.
Preferably, denitrification and short-cut denitrification technique are also included in the anoxic pond.
Preferably, denitrification and the short-cut denitrification technique is：Nitrate nitrogen and nitrite nitrogen, which utilize, to be surmounted in mixed liquor
Carbon source carry out anti-nitration reaction and short-cut denitrification reaction.
Preferably, the limit oxygen aeration tank dissolved oxygen amount control is 0.2-1.0mg/L, and hydraulic detention time is controlled in 2-6h.
Preferably, the limit oxygen aeration tank dissolved oxygen amount control is 0.7mg/L, and hydraulic detention time control is 5h.
Preferably, the anaerobic pond controls the 5-30% in inflow to the exceeding flux of anoxic pond.
The denitrification and dephosphorization method of low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology, comprises the following steps：
Step 1, inlet channel is opened, sewage enters anaerobic pond, and Denitrifying Phosphate Accumulating Organisms utilize carbon in water inlet in anaerobic pond
Realize that preliminary biology releases phosphorus in source；
Step 2, the mixed liquor after anaerobic pond processing are partly into limit oxygen aeration tank and carry out Air Exposure, are exposed in limit oxygen
Gas pond is different with the saturation dissolved oxygen coefficient of nitrifier using ammonia oxidation bacteria, by controlling dissolved oxygen amount and hydraulic detention time, makes to mix
Close liquid generation nitrite nitrogen accumulation and realize short distance nitration；
Step 3, mixed liquor another part after anaerobic pond processing enter anoxic pond by surmounting pipeline, exposed with time limit oxygen
The nitrite nitrogen of gas pond accumulation also enters anoxic pond, and denitrification phosphorus-collecting process and anaerobic ammonium oxidation process are completed in anoxic pond, lacks
The oxygen tank waterpower residence time is controlled in 3-8h；
The denitrification phosphorus-collecting technique is that Denitrifying Phosphate Accumulating Organisms utilize itself carbon source, utilizes the oxygen in nitrate nitrogen or nitrite nitrogen
Denitrogenation dephosphorizing reaction is carried out, realizes that a carbon of denitrogenation dephosphorizing is dual-purpose；
The anaerobic ammonia oxidation process is limited the nitrite nitrogen accumulated in oxygen aeration tank and the ammonia nitrogen compound for surmounting mixed liquor
Directly reaction generates nitrogen under anaerobic ammonia oxidizing bacteria effect, realizes no carbon source denitrification process；
Step 4, the mixed liquor after anoxic pond is handled enter aerobic aeration pond, and polyP bacteria utilizes in aerobic aeration pond
The carbon source of oxygen and itself storage in air carries out highly effective aerobic and inhales phosphorus, and ammonia oxidation bacteria will be residual in the next mixed liquor of anoxic pond conveying
Remaining ammonia nitrogen compound is converted into nitrite nitrogen, and nitrite nitrogen is further oxidized to nitrate nitrogen by nitrifier, makes substantially not having in water outlet
The accumulation of nitrite nitrogen, meet effluent index requirement；
Step 5, the mixed liquor for completing denitrogenation dephosphorizing enter second pond, separation of solid and liquid are carried out in second pond, supernatant enters
Enter successive depths processing section, after precipitation enters anaerobic pond by reflux line, repeat the above steps.
Preferably, denitrification and short-cut denitrification technique are also included in the step 3.
Preferably, denitrification and the short-cut denitrification technique is that nitrate nitrogen and nitrite nitrogen are utilized and surmounted in mixed liquor
Carbon source carries out anti-nitration reaction and short-cut denitrification reaction.
Preferably, the dissolved oxygen amount is 0.2-1.0mg/L, and hydraulic detention time is controlled in 2-6h.
Preferably, the limit oxygen aeration tank dissolved oxygen amount control is 0.7mg/L, and hydraulic detention time control is 5h.
Preferably, the anaerobic pond controls the 5-30% in inflow to the exceeding flux of anoxic pond.
The advantageous effects that the present invention is reached：
The present invention, in sewerage, the dual-purpose saving carbon source technique of a carbon is realized by denitrification phosphorus-collecting technique；In addition,
By controlling the dissolved oxygen amount in limit oxygen aeration tank, the accumulation of nitrite nitrogen is realized, surmounts mix in anoxic Duan Yucong anaerobism sections
Close liquid and complete the enrichment of anaerobic ammonia oxidizing bacteria and the realization of anaerobic ammonia oxidation process；The present invention is simple in construction, easy to operate, and
Good sewage processing effect, the bottleneck of prior art is breached, be the once innovation of the art, be adapted to low ratio of carbon to ammonium city dirty
Water popularization and application.
Brief description of the drawings
Fig. 1 is the structural representation of the low carbon-nitrogen ratio sewage denitrification dephosphorization system of the invention based on biotechnology.
Embodiment
It is existing in order to which auditor can be better understood by technical characteristic, technology contents and its technique effect reached of the present invention
The accompanying drawing of the present invention is described in detail in conjunction with the embodiments.However, shown accompanying drawing, is intended merely to better illustrate this hair
Bright technical scheme, be not the present invention actual proportions and best configuration, so, ask auditor should not with regard to accompanying drawing ratio and
Configuration, limit the claims of the present invention.
Patent of the present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology of present invention offer, including according to
The anaerobic pond 1 of secondary connection, limit oxygen aeration tank 2, anoxic pond 3, aerobic aeration pond 4 and second pond 5, the anaerobic pond 1 connect into
Waterpipe 6, the anaerobic pond 1 are connected by surmounting pipeline 8 with anoxic pond 3, and the second pond 5 is by reflux line 7 with detesting
Oxygen pond 1 is connected, and the limit oxygen aeration tank 2 and the aerobic aeration pond 4 are connected with aerator 9；
The anaerobic pond 1 is used for Denitrifying Phosphate Accumulating Organisms and utilizes carbon source material in sewage, realizes anaerobic phosphorus release, and by carbon source
Material is stored in vivo, for denitrification phosphorus-collecting and aerobic phosphorous accumulating；
By controlling dissolved oxygen amount in the limit oxygen aeration tank 2, make the mixed liquor after anaerobic pond is handled that short distance nitre occur
Change, realize the accumulation of nitrite nitrogen；
The anoxic pond 3 receive limit oxygen aeration tank mixed liquor and anaerobic pond by surmount pipeline come surmount mixing
Liquid, realize following technique：
1) mixed liquor surmounted from anaerobism section, containing Denitrifying Phosphate Accumulating Organisms and itself carbon source, using from by limit oxygen aeration
The nitrite nitrogen and nitrate nitrogen in pond carry out denitrification phosphorus-collecting, make denitrification denitrogenation is synchronous with poly- phosphorus to carry out, on the basis of a carbon is dual-purpose
Realize denitrification phosphorus-collecting technique；
2) limit the nitrite nitrogen of oxygen aeration tank accumulation and surmount the ammonia nitrogen compound of mixed liquor, under anaerobic ammonia oxidizing bacteria effect
Nitrogen is converted into, realizes direct denitrogenation, realizes the carbon-free denitrogenation of anaerobic ammonia oxidation process；
3) nitrate nitrogen and nitrite nitrogen are anti-using the carbon source progress anti-nitration reaction and short-cut denitrification surmounted in mixed liquor
Should, realize denitrification and short-cut denitrification technique；
In the aerobic aeration pond, ammonia oxidation bacteria produces sub- to not carrying out aerobic aminating reaction using complete a small amount of ammonia nitrogen
Nitrate nitrogen removes ammonia nitrogen, and nitrifier further carries out nitration reaction using nitrite nitrogen, nitrite nitrogen is converted into nitrate nitrogen, denitrification
PolyP bacteria carries out aerobic phosphorus absorption using the oxygen in air, further reduces water outlet total phosphorus.
The denitrification and dephosphorization method of low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology, comprises the following steps：
Step 1, inlet channel is opened, sewage enters anaerobic pond, and Denitrifying Phosphate Accumulating Organisms utilize carbon in water inlet in anaerobic pond
Realize that preliminary biology releases phosphorus in source；
Step 2, the mixed liquor after anaerobic pond processing are partly into limit oxygen aeration tank and carry out Air Exposure, are exposed in limit oxygen
Gas pond is different with the saturation dissolved oxygen system of nitrifier using ammonia oxidation bacteria, and by controlling dissolved oxygen amount, the dissolved oxygen amount is 0.2-
1.0mg/L, hydraulic detention time are controlled in 2-6h, are made mixed liquor that nitrite nitrogen accumulation occur and are realized short distance nitration；
Step 3, mixed liquor another part after anaerobic pond processing enter anoxic pond by surmounting pipeline, exposed with time limit oxygen
The nitrite nitrogen of gas pond accumulation also enters anoxic pond, and control hydraulic detention time is completed instead in anoxic pond in 3-8h in anoxic pond
Nitrify poly- phosphorus technique, anaerobic ammonia oxidation process and denitrification and short-cut denitrification technique；
The denitrification phosphorus-collecting technique is that Denitrifying Phosphate Accumulating Organisms utilize itself carbon source, is entered using the oxygen in nitrate nitrogen or nitrous
Row denitrogenation dephosphorizing is reacted, and denitrification phosphorus-collecting technique is realized on the dual-purpose basis of a carbon；
The anaerobic ammonia oxidation process is limited the nitrite nitrogen accumulated in oxygen aeration tank and the ammonia nitrogen compound for surmounting mixed liquor
Directly reaction generation nitrogen, realizes no carbon source denitrification process；
Denitrification and the short-cut denitrification technique is that nitrate nitrogen and nitrite nitrogen are entered using the carbon source surmounted in mixed liquor
Row anti-nitration reaction and short-cut denitrification reaction.
Step 4, the mixed liquor after anoxic pond is handled enter aerobic aeration pond, and polyP bacteria utilizes in aerobic aeration pond
The carbon source of oxygen and itself storage in air carries out highly effective aerobic and inhales phosphorus, and nitrifier will be remaining in the next mixed liquor of anoxic pond conveying
Ammonia nitrogen compound be converted into nitrate nitrogen, meet effluent index requirement；
Step 5, the mixed liquor for completing denitrogenation dephosphorizing enter second pond, separation of solid and liquid are carried out in second pond, supernatant enters
Enter successive depths processing section, after precipitation enters anaerobic pond by reflux line, repeat the above steps.
Embodiment：
Using municipal sewage as water inlet, average carbon-nitrogen ratio is 2.5, carbon-phosphorus ratio 15：1：Water inlet uses adjustable flow centrifugal pump, detests
The hydraulic detention time of oxygen section 1 is 2.5 hours, and the hydraulic detention time of limit oxygen aeration tank 2 is 5 hours, and the waterpower of anoxic pond 3 is stopped
It is 5 hours to stay the time, and the hydraulic detention time in aerobic aeration pond 4 is 1 hour, and dissolved oxygen control 0.7mg/L, sludge reflux amount uses
50% flow of inlet water, surmount the flow of segment pipe 8 using about 15% flow of inlet water, plant running three months, in no interior backflow
In the case of, nitrogen removal rate more than 76%, total tp removal rate more than 95% are realized, effluent quality averagely reaches one-level A Effluent criterias.
The present invention is disclosed with preferably embodiment above, so it is not intended to limiting the invention, and all take equally is replaced
Change or technical scheme that the scheme of equivalent transformation is obtained, all fall within protection scope of the present invention.
Claims (10)
1. a kind of low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology, it is characterised in that detest including what is be sequentially connected
Oxygen pond, limit oxygen aeration tank, anoxic pond, aerobic aeration pond and second pond, the anaerobic pond connect inlet channel, the anaerobic pond
It is connected by surmounting pipeline with anoxic pond, the second pond is connected by reflux line with anaerobic pond, the limit oxygen aeration
Pond, aerobic aeration pond are connected with aerator；
The anaerobic pond is used for Denitrifying Phosphate Accumulating Organisms and utilizes carbon source material in sewage, realizes anaerobic phosphorus release, and by carbon source material
Store in vivo, for denitrification phosphorus-collecting and aerobic phosphorous accumulating；
By controlling dissolved oxygen amount in the limit oxygen aeration tank, make the mixed liquor after anaerobic pond is handled that short distance nitration occur, in fact
The accumulation of existing nitrite nitrogen；
The anoxic pond receives the mixed liquor of limit oxygen aeration tank and anaerobic pond surmounts mixed liquor, reality by surmount that pipeline comes
Now following technique：
1) surmount mixed liquor from the conveying of anaerobism section, containing Denitrifying Phosphate Accumulating Organisms and itself carbon source, connect using from limit oxygen aeration tank
Nitrite nitrogen and nitrate nitrogen in the mixed liquor of receipts carry out denitrification phosphorus-collecting, realize that a carbon is dual-purpose；
2) limit the nitrite nitrogen of oxygen aeration tank accumulation and surmount the ammoniacal nitrogen of mixed liquor, nitrogen is converted under anaerobic ammonia oxidizing bacteria effect
Gas, realize directly carbon-free denitrogenation；
In the aerobic aeration pond, ammonia oxidation bacteria produces nitrite nitrogen and gone to not carrying out aerobic ammonia oxidation reaction using complete ammonia nitrogen
Except ammonia nitrogen, nitrifier further carries out nitration reaction using nitrite nitrogen, nitrite nitrogen is converted into nitrate nitrogen, Denitrifying Phosphate Accumulating Organisms
Aerobic phosphorus absorption is carried out using dissolved oxygen is aerated, further reduces water outlet total phosphorus.
2. the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 1 based on biotechnology, it is characterised in that：Institute
Stating also includes denitrification denitrogenation and short-cut denitrification denitrification process in anoxic pond.
3. the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 2 based on biotechnology, it is characterised in that：Institute
State denitrification and short-cut denitrification technique is：Nitrate nitrogen and nitrite nitrogen are anti-using the carbon source progress denitrification surmounted in mixed liquor
It should be reacted with short-cut denitrification.
4. the low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology according to claim any one of 1-3, it is special
Sign is：The limit oxygen aeration tank dissolved oxygen amount control is 0.2-1.0mg/L, and hydraulic detention time control is 2-6h.
5. the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 4 based on biotechnology, it is characterised in that：Institute
It is 0.7mg/L to state the dissolved oxygen amount control of limit oxygen aeration tank, and hydraulic detention time control is 5h.
6. the denitrogenation dephosphorizing side of the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 1 based on biotechnology
Method, it is characterised in that：Comprise the following steps：
Step 1, open inlet channel, sewage enters anaerobic pond, in anaerobic pond and second pond flows back the denitrification phosphorus-collecting to come
Bacterium realizes that biology releases phosphorus using carbon source in water inlet；
Step 2, the mixed liquor after anaerobic pond processing are partly into limit oxygen aeration tank and carry out Air Exposure, in limit oxygen aeration tank
It is different with the saturation dissolved oxygen coefficient of nitrifier using ammonia oxidation bacteria, by controlling dissolved oxygen amount and hydraulic detention time, make mixed liquor
Short distance nitration is realized in the accumulation of generation nitrite nitrogen；
Step 3, mixed liquor another part after anaerobic pond processing enters anoxic pond by surmounting pipeline, with time limit oxygen aeration tank
The nitrite nitrogen of accumulation also enters anoxic pond, and denitrification phosphorus-collecting process and anaerobic ammonium oxidation process, anoxic pond are completed in anoxic pond
Hydraulic detention time is controlled in 3-8h；
The denitrification phosphorus-collecting process is that Denitrifying Phosphate Accumulating Organisms utilize itself carbon source, is carried out using the oxygen in nitrate nitrogen or nitrite nitrogen
Denitrogenation dephosphorizing reacts, and realizes that a carbon of denitrogenation dephosphorizing is dual-purpose；
The anaerobic ammonium oxidation process nitrite nitrogen accumulated in oxygen aeration tank that is limited is being detested with surmounting the ammonia nitrogen compound of mixed liquor
The lower directly reaction generation nitrogen of anaerobic ammonium oxidation bacterium effect, realizes no carbon source denitrification process；
Step 4, the mixed liquor after anoxic pond is handled enter aerobic aeration pond, and polyP bacteria utilizes air in aerobic aeration pond
In oxygen and the carbon source of itself storage carry out highly effective aerobic and inhale phosphorus, ammonia oxidation bacteria and nitrifier jointly carry out anoxic pond conveying mixed
Close ammonia nitrogen compound remaining in liquid and be converted into nitrate nitrogen, meet effluent index requirement；
Step 5, the mixed liquor for completing denitrogenation dephosphorizing enter second pond, separation of solid and liquid are carried out in second pond, after supernatant enters
Continuous advanced treating section, after precipitation enters anaerobic pond by reflux line, repeats the above steps.
7. the denitrogenation dephosphorizing side of the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 6 based on biotechnology
Method, it is characterised in that：Also include denitrification and short-cut denitrification technique in the step 3.
8. the denitrogenation dephosphorizing side of the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 7 based on biotechnology
Method, it is characterised in that：Denitrification and the short-cut denitrification technique is that nitrate nitrogen and nitrite nitrogen are utilized and surmounted in mixed liquor
Carbon source carries out anti-nitration reaction and short-cut denitrification reaction.
9. the denitrogenation of the low carbon-nitrogen ratio sewage denitrification dephosphorization system based on biotechnology according to claim any one of 6-8
Phosphorus removing method, it is characterised in that：The dissolved oxygen amount of the limit oxygen aeration tank is 0.2-1.0mg/L, hydraulic detention time 2-6h.
10. the denitrogenation dephosphorizing side of the low carbon-nitrogen ratio sewage denitrification dephosphorization system according to claim 9 based on biotechnology
Method, it is characterised in that：The dissolved oxygen amount of the limit oxygen aeration tank is 0.7mg/L, hydraulic detention time 5h.
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| CN105906044B (en) * | 2016-06-17 | 2018-12-18 | 北京工业大学 | The device and method of the synchronous endogenous denitrification processing Low-carbon Urban Wastewater of Anammox coupling denitrification dephosphorization |
| CN107777774A (en) * | 2017-11-24 | 2018-03-09 | 苏州科技大学 | A kind of integrated short distance nitration anaerobic ammonium oxidation apparatus |
| CN108249569A (en) * | 2017-12-29 | 2018-07-06 | 简阳海天水务有限公司 | A kind of efficient sewage water denitrification technique |
| CN109574224B (en) * | 2018-12-10 | 2024-02-13 | 中国科学院生态环境研究中心 | Livestock and poultry wastewater treatment system and method |
| CN112093977B (en) * | 2020-09-03 | 2023-01-06 | 浙江深德环境技术有限公司 | Activated sludge process-based low-carbon-nitrogen-ratio sewage nitrogen and phosphorus removal system and method |
| CN114702136B (en) * | 2022-04-19 | 2023-08-22 | 青岛思普润水处理股份有限公司 | AOA coupling efficient autotrophic denitrification water treatment method and system |
| CN114702137B (en) * | 2022-04-19 | 2023-04-21 | 青岛思普润水处理股份有限公司 | Autotrophic nitrogen removal reinforced AOA water treatment method and system based on MBBR |
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