CN108947100A - A kind of reinforced sewage denitrification denitrogenation system and method - Google Patents
A kind of reinforced sewage denitrification denitrogenation system and method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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Abstract
The present invention relates to a kind of reinforced sewage denitrification denitrogenation system and method, the reinforced sewage denitrification denitrogenation system includes sequentially connected anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, further include: control system, control system are connect with aerating system and carbon source dosing system；Control system controls aerator aeration, so that aerobic tank DO concentration is 0.5-2.9mg/L, water outlet ammonia nitrogen concentration is 0.5-1.5mg/L；Nitrate nitrogen is fed back to control system by nitrate nitrogen on-line computing model by carbon source dosing system, and when aerobic tank is discharged the concentration of nitrate nitrogen higher than setting value 10mg/L, control system controls carbon source throwing device and puts into anoxic pond by 5-7 unit carbon source/unit nitrate.The present invention realizes that sewage treatment plant gap is aerated so that stable water outlet is up to standard and save aeration consumption, simultaneously, it is accurately offerd medicine using carbon source dosing system according to water outlet the concentration of nitrate nitrogen in anoxic zone and realizes efficient denitrification, energy save aeration consumption, reduce phegma DO concentration, and carbon source is accurately added according to nitrate nitrogen concentration, to realize efficient denitrification and save carbon source cost.
Description
Technical field
The present invention relates to a kind of denitrification system, especially a kind of reinforced sewage denitrification denitrogenation system further relates to method, belongs to
In sewage treatment field.
Background technique
With the continuous improvement of economic continuous development and environmental requirement, requirement of the China to sewage treatment plant's water quality is got over
Come stringenter, especially the sewage treatment plant in major river valley (" three lakes, three river ") is required stringenter.For the dirt of water shortage city
Water treatment plant's tail water can be used as recycled water, pours and spills for urban afforestation, river moisturizing and road, thus to sewage treatment plant's tail
The water quality of water is increasingly valued by people.
Municipal sewage plant is mainly the pollutants such as COD, TP and TN in removal sewage.COD passes through micro- life in sewage
Object effect is easy for remove, and the difficult point of sewage treatment at present is denitrogenation and dephosphorization.
Denitrogenation dephosphorizing mainly uses biological nitrification and denitrification and biochemistry based on anaerobism, anoxic and aerobic process to remove
The technique that phosphorus combines.Being studied municipal sewage plant of China water inlet phosphorus can mutually be tied by biological phosphate-eliminating with chemical coagulation and precipitation
The mode of conjunction removes and can stablize " town sewage plant pollutant emission standard " (GB18918-2002) the level-one A standard of reaching.Nitrogen is existing
Stage can only be removed by microbial action, and then nitrogen is the main indicator for influencing sewage disposal plant effluent stably reaching standard.De-
Mineralized nitrogen in aerobic zone is nitrate by mainly nitrifier during nitrogen, and in anoxic zone, denitrifying bacterium is using carbon source by nitric acid
Salt nitrogen is converted into nitrogen.There are low-carbon-source features for China's municipal sewage, so effectively carbon source is relatively low in water inlet, it is difficult to support
The effective denitrogenation of denitrifying bacterium；Moreover, there are denitrifying bacteriums and polyP bacteria competition carbon source to ask in traditional denitrification dephosphorization technique
Topic, denitrogenation and dephosphorization cannot concurrently reach optimum efficiency.Interior exteenal reflux is also to influence denitrogenation dephosphorizing in sewage disposal process
Factor, DO concentration control in aerobic zone end is bad, and interior reflux meeting is so that the dissolved oxygen that aerobic tank enters anoxic pond increases, to disappear
Organic carbon source in consumption water inlet, influences the efficiency of denitrification denitrogenation.Thus exact gradient aeration is implemented to sewage treatment plant aerobic zone,
The nitric efficiency of sewage treatment plant can effectively be increased by adding carbon source in anoxic simultaneously.
Traditional wastewater treatment plant causes the excessively high sludge aging of dissolved oxygen and energy consumption wave there are aerobic zone aeration quantity is difficult to control
Take；Interior reflux dissolved oxygen is excessively high to cause the limited carbon source in anoxic zone to be utilized in vain by oxygen consumption；Water-inlet carbon source deficiency causes denitrification to be received
To inhibition, the problems such as being discharged TN excessive concentration.
Summary of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of reinforced sewage denitrification denitrogenation system and method, utilizes
Robot control system(RCS) accurately controls sewage treatment plant's aerobic zone dissolved oxygen, while accurately adding carbon source in anoxic and realizing efficient denitrification mesh
's.
In order to achieve the above objectives, the technical solution adopted by the present invention are as follows:
A kind of reinforced sewage denitrification denitrogenation system, including sequentially connected anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, also
Include:
Control system, control system are connect with aerating system and carbon source dosing system；
Aerating system, including the first DO on-line computing model, the 2nd DO on-line computing model, the 3rd DO on-line computing model, ammonia nitrogen are online
Monitor and aerator, the first DO on-line computing model, the 2nd DO on-line computing model and the 3rd DO on-line computing model are respectively arranged on
Near the front end in oxygen pond, middle-end and end；Ammonia nitrogen on-line computing model be set to aerobic tank 3/4 areas adjacent, by aerobic tank front end,
The ammonia nitrogen concentration of the DO concentration and aerobic tank rear end of middle-end and rear end feeds back to control system, and control system controls aerator and exposes
Gas, so that aerobic tank DO concentration is 0.5-2.9mg/L, water outlet ammonia nitrogen concentration is 0.5-1.5mg/L；
Carbon source dosing system, the carbon source including being set to the nitrate nitrogen on-line computing model of aerobic tank end and set on anoxic pond front end are thrown
Nitrate nitrogen is fed back to control system by feeder apparatus, nitrate nitrogen on-line computing model, is higher than setting when aerobic tank is discharged the concentration of nitrate nitrogen
When value 10mg/L, control system controls carbon source throwing device and puts into anoxic pond by 5-7 unit carbon source/unit nitrate.
Further, the first DO on-line computing model, the 2nd DO on-line computing model, the 3rd DO on-line computing model, ammonia nitrogen are online
Monitor and nitrate nitrogen on-line computing model include probe.
Further, electromagnetic flowmeter and electric control valve, Electromagnetic Flow are additionally provided on aerator and carbon source throwing device
Meter and electric control valve are connect with control system.
Further, secondary settling tank is also connected to anaerobic pond front end, and aerobic tank is also connected to anoxic pond front end, the pipeline of connection
On be additionally provided with electromagnetic flowmeter and solenoid valve.
Further, a blender is equipped in anaerobic pond, the front-end and back-end in anoxic pond are respectively provided with a blender.
Reinforced sewage denitrification method of the present invention based on above-mentioned system, is carried out as follows:
DO concentration, water outlet ammonia nitrogen concentration and water outlet the concentration of nitrate nitrogen of aerobic tank are set on the man-machine interface of the control system；It is dirty
Water is discharged after anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, the first DO on-line computing model, the 2nd DO on-line computing model and
3rd DO on-line computing model monitors the DO concentration of the front end of aerobic tank, middle-end and rear end respectively, and ammonia nitrogen on-line computing model monitors
The water outlet ammonia nitrogen concentration in oxygen pond, nitrate nitrogen on-line computing model monitoring water outlet the concentration of nitrate nitrogen, and feed back to control system；
When being discharged ammonia nitrogen lower than 0.5mg/L, control system controls aerating system and stops aeration, regulates and controls without DO；Work as water outlet
After ammonia nitrogen is higher than 1.5mg/L, control system controls aerating system aeration, and control aerobic tank DO concentration range is 0.5-2.9mg/L,
If DO concentration is greater than 2.9mg/L in pond, aeration quantity is reduced, DO concentration is less than 0.5mg/L in pond, then increases aeration quantity, make
It is 0.5-1.5mg/L that ammonia nitrogen concentration range, which must be discharged,；
When aerobic tank is discharged the concentration of nitrate nitrogen higher than setting value 10mg/L, it is mono- by 5-7 that control system controls carbon source throwing device
Position carbon source/unit nitrate puts into anoxic pond.
Compared with prior art, beneficial effects of the present invention are as follows:
For built sewage treatment plant, the present invention passes through online DO monitor, online ammonia nitrogen monitor, online nitrate nitrogen prison
It surveys instrument, electric control valve and flowmeter and general control system combines motor-driven realization sewage treatment plant system high efficiency denitrification effect.
Control system control aeration mode realizes that sewage treatment plant accurately supplies oxygen, meanwhile, it is controlled using water outlet ammonia nitrogen concentration
The start and stop of entire sewage treatment plant aerating system, so that aerobic tank DO concentration is 0.5-2.9mg/L, water outlet ammonia nitrogen concentration is 0.5-
1.5mg/L realizes that sewage treatment plant gap is aerated so that stable water outlet is up to standard and save aeration consumption, meanwhile, in anoxic zone benefit
It is accurately offerd medicine with carbon source dosing system according to water outlet the concentration of nitrate nitrogen and realizes efficient denitrification.It is dirty according to water inlet by being precisely controlled
Object load variations are contaminated, changes aeration zone DO concentration and realizes accurate nitrification and save aeration consumption, reduce phegma DO concentration, and root
Carbon source is accurately added according to nitrate nitrogen concentration, to realize efficient denitrification, and saves carbon source cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reinforced sewage denitrification denitrogenation system of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out clearly and completely to the technical solution in the present embodiment
Description, it is clear that described embodiment is only rather than whole example to a part of example of the present invention.Based on the present invention
In embodiment, those of ordinary skill in the art's every other implementation obtained under that premise of not paying creative labor
Example, shall fall within the protection scope of the present invention.
As shown in Figure 1, the reinforced sewage denitrification denitrogenation system of the present embodiment, including sequentially connected anaerobic pond, anoxic
Pond, aerobic tank and secondary settling tank.It is additionally provided with general control system, general control system is connect with aerating system 2 and carbon source dosing system 1；
General control system receives the real-time status of the aerobic tank of carbon source dosing system 1 and aerating system 2, to carbon source dosage and aeration quantity
It is accurately controlled.
Carbon source dosing system 1 includes set on the nitrate nitrogen on-line computing model 1.3 of aerobic tank end and set on anoxic pond front end
Carbon source throwing device, carbon source throwing device includes carbon source storage tank 1.1 and control device 1.2, and nitrate nitrogen on-line computing model 1.3 will
The nitrate nitrogen content of aerobic tank feeds back to control device 1.2, then feeds back to general control system, when aerobic tank water outlet nitrate nitrogen is dense
When degree is higher than setting value 10mg/L, control system controls carbon source throwing device and puts into anoxic by 5-7 unit carbon source/unit nitrate
Pond promotes anoxic zone denitrification efficiency to reach strengthened denitrification effect.On the pipeline that carbon source storage tank 1.1 is connected to anoxic pond front end also
Equipped with solenoid valve 1.6 and electromagnetic flowmeter 1.7, control device 1.2 passes through solenoid valve 1.6 and electromagnetic flowmeter 1.7
Carbon source additive amount is controlled.
Aerating system 2 includes the first DO on-line computing model 2.2, the 2nd DO on-line computing model 2.3, the 3rd DO on-line computing model
2.5, ammonia nitrogen on-line computing model 2.4 and aerator 2.1, the first DO on-line computing model 2.2, the 2nd DO on-line computing model 2.3 and
Three DO on-line computing models 2.5 are respectively arranged near front end, middle-end and the end of aerobic tank；Ammonia nitrogen on-line computing model 2.4 is set to
3/4 areas adjacent in oxygen pond, to regulate and control the reserved reaction time to aeration.
First DO on-line computing model 2.2, the 2nd DO on-line computing model 2.3, the 3rd DO on-line computing model 2.5, ammonia nitrogen are online
The ammonia nitrogen concentration of the DO concentration of aerobic tank front end, middle-end and rear end and aerobic tank rear end is fed back to master control by monitor 2.4
System, general control system control aerator 2.1 and are aerated, so that the DO concentration of three DO on-line computing models is controlled in 0.5-2.9mg/
L, water outlet ammonia nitrogen concentration are 0.5-1.5mg/L；The outlet pipe of aerator is respectively communicated with front end, middle-end and the rear end of aerobic tank,
The pipeline of connection is equipped with solenoid valve, general control system by the solenoid valve adjusting front end of aerobic tank, middle-end and after
The aeration quantity at end.The present embodiment is that the solenoid valve open range 0%-100% adjusted on tracheae realizes that aeration quantity is adjusted, and then realizes
The gradient of DO controls.
First DO on-line computing model 2.2, the 2nd DO on-line computing model 2.3, the 3rd DO on-line computing model 2.5, ammonia nitrogen are online
Monitor 2.4 and nitrate nitrogen on-line computing model 2.5 can be set in aerobic tank by probe.
Secondary settling tank is connected to by pipeline with anaerobic pond front end, and exteenal reflux is formed, which is equipped with solenoid valve and electricity
Magnetic flowmeter.Aerobic tank also passes through pipeline and is connected to anoxic pond front end, forms interior reflux, is additionally provided with electromagnetic current on the pipeline of connection
Meter and solenoid valve.General control system controls exteenal reflux and interior reflux by above-mentioned electromagnetic flowmeter and solenoid valve
Flow.Wherein, secondary settling tank is sludge exteenal reflux to anaerobic pond, and aerobic tank to anoxic pond is reflux in sludge.
A blender is equipped in anaerobic pond, the front-end and back-end in anoxic pond are respectively provided with a blender.
The reinforced sewage denitrification method based on above-mentioned system that the present embodiment is related to, is carried out as follows:
DO concentration, water outlet ammonia nitrogen concentration and water outlet the concentration of nitrate nitrogen of aerobic tank are set on the man-machine interface of the control system；It is dirty
Water is discharged after anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, the first DO on-line computing model, the 2nd DO on-line computing model and
3rd DO on-line computing model monitors the DO concentration of the front end of aerobic tank, middle-end and rear end respectively, and ammonia nitrogen on-line computing model monitors
The water outlet ammonia nitrogen concentration in oxygen pond, nitrate nitrogen on-line computing model monitoring water outlet the concentration of nitrate nitrogen, and feed back to control system；
When being discharged ammonia nitrogen lower than 0.5mg/L, stop aeration, energy saving regulates and controls without DO.When water outlet ammonia nitrogen is higher than
After 1.5mg/L, aerating system aeration restarts blower, and control aerobic tank DO concentration range is 0.5-2.9mg/L, if pond
Interior DO concentration is greater than 2.9mg/L, then control system control electric control valve reduces aeration quantity, and DO concentration is less than 0.5mg/L in pond,
Then control system control electric control valve increases aeration quantity.It is final to realize that water outlet ammonia nitrogen concentration range is 0.5-1.5mg/L.
When aerobic tank is discharged the concentration of nitrate nitrogen higher than setting value 10mg/L, control system controls carbon source throwing device and presses 5-
7 unit carbon sources/unit nitrate puts into anoxic pond.
The DO concentration of real-time monitoring sewage treatment plant difference aerobic zone and and robot control system(RCS) and different aerated spaces aeration tube
On electric control valve formed automatic feedback regulating system, realize setting DO concentration value exact gradient aeration, be discharged ammonia nitrogen
By measurement water outlet ammonia nitrogen concentration and by its numeric feedback to aeration control system and aerator, realization is being set on-line computing model
It is discharged the start and stop of aerator under ammonia nitrogen concentration value.
It is discharged online nitric acid monitor measurement water outlet the concentration of nitrate nitrogen and is fed back to control system for adding drugs, and by controlling
System regulation electric control valve and electromagnetic flowmeter are realized to sewage disposal system anoxic zone and accurately add carbon source.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of reinforced sewage denitrification denitrogenation system, including sequentially connected anaerobic pond, anoxic pond, aerobic tank and secondary settling tank,
It is characterized by also including:
Control system, control system are connect with aerating system and carbon source dosing system；
Aerating system, including the first DO on-line computing model, the 2nd DO on-line computing model, the 3rd DO on-line computing model, ammonia nitrogen are online
Monitor and aerator, the first DO on-line computing model, the 2nd DO on-line computing model and the 3rd DO on-line computing model are respectively arranged on
Near the front end in oxygen pond, middle-end and end；Ammonia nitrogen on-line computing model be set to aerobic tank 3/4 areas adjacent, by aerobic tank front end,
The ammonia nitrogen concentration of the DO concentration and aerobic tank rear end of middle-end and rear end feeds back to control system, and control system controls aerator and exposes
Gas, so that aerobic tank DO concentration is 0.5-2.9mg/L, water outlet ammonia nitrogen concentration is 0.5-1.5mg/L；
Carbon source dosing system, the carbon source including being set to the nitrate nitrogen on-line computing model of aerobic tank end and set on anoxic pond front end are thrown
Nitrate nitrogen is fed back to control system by feeder apparatus, nitrate nitrogen on-line computing model, is higher than setting when aerobic tank is discharged the concentration of nitrate nitrogen
When value 10mg/L, control system controls carbon source throwing device and puts into anoxic pond by 5-7 unit carbon source/unit nitrate.
2. reinforced sewage denitrification denitrogenation system according to claim 1, it is characterised in that: the first DO on-line computing model,
2nd DO on-line computing model, the 3rd DO on-line computing model, ammonia nitrogen on-line computing model and nitrate nitrogen on-line computing model include probe.
3. reinforced sewage denitrification denitrogenation system according to claim 1, it is characterised in that: aerator and carbon source add dress
It sets and is additionally provided with electromagnetic flowmeter and electric control valve, electromagnetic flowmeter and electric control valve are connect with control system.
4. reinforced sewage denitrification denitrogenation system according to claim 1, it is characterised in that: secondary settling tank is also and before anaerobic pond
End connection, aerobic tank are also connected to anoxic pond front end, are additionally provided with electromagnetic flowmeter and solenoid valve on the pipeline of connection.
5. reinforced sewage denitrification denitrogenation system according to claim 1, it is characterised in that: be equipped with one in anaerobic pond and stir
Device is mixed, the front-end and back-end in anoxic pond are respectively provided with a blender.
6. the reinforced sewage denitrification method of the system based on one of claim 1-5, it is characterised in that: by below into
Row:
DO concentration, water outlet ammonia nitrogen concentration and water outlet the concentration of nitrate nitrogen of aerobic tank are set on the man-machine interface of the control system；It is dirty
Water is discharged after anaerobic pond, anoxic pond, aerobic tank and secondary settling tank, the first DO on-line computing model, the 2nd DO on-line computing model and
3rd DO on-line computing model monitors the DO concentration of the front end of aerobic tank, middle-end and rear end respectively, and ammonia nitrogen on-line computing model monitors
The water outlet ammonia nitrogen concentration in oxygen pond, nitrate nitrogen on-line computing model monitoring water outlet the concentration of nitrate nitrogen, and feed back to control system；
When being discharged ammonia nitrogen lower than 0.5mg/L, control system controls aerating system and stops aeration, regulates and controls without DO；Work as water outlet
After ammonia nitrogen is higher than 1.5mg/L, control system controls aerating system aeration；If DO concentration is greater than 2.9mg/L in pond, exposure is reduced
Tolerance, DO concentration is less than 0.5mg/L in pond, then increases aeration quantity, and control aerobic tank DO concentration range is 0.5-2.9mg/L；Make
It is 0.5-1.5mg/L that ammonia nitrogen concentration range, which must be discharged,；
When aerobic tank is discharged the concentration of nitrate nitrogen higher than setting value 10mg/L, it is mono- by 5-7 that control system controls carbon source throwing device
Position carbon source/unit nitrate puts into anoxic pond.
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Cited By (16)
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| CN109704463A (en) * | 2019-02-26 | 2019-05-03 | 沧州市供水排水集团有限公司 | A kind of AAO process spent water treatment plant carbon source optimizing dosing system |
| CN109879421A (en) * | 2019-03-07 | 2019-06-14 | 北控水务(中国)投资有限公司 | It is a kind of based on multipoint water feeding and multi-mode operation can intensified anti-nitrated denitrification dephosphorization system |
| CN110372093A (en) * | 2019-07-04 | 2019-10-25 | 昆明滇池水务股份有限公司 | A kind of multidimensional Precise control sewage disposal system and sewage water treatment method |
| CN110482686A (en) * | 2019-03-26 | 2019-11-22 | 浙江海牛环境科技股份有限公司 | A kind of system and method proposing effect suitable for the consumption reduction of oxidation ditch biological denitrification |
| CN110683642A (en) * | 2019-10-10 | 2020-01-14 | 中冶华天工程技术有限公司 | Biological denitrification method based on automatic control |
| CN111018110A (en) * | 2019-12-30 | 2020-04-17 | 北京首创清源环境科技有限公司 | Sewage biochemical treatment system and control method |
| CN112209503A (en) * | 2020-09-15 | 2021-01-12 | 河南同生环境工程有限公司 | Oxidation ditch denitrification control system |
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| CN112939207A (en) * | 2021-01-29 | 2021-06-11 | 联合环境技术(天津)有限公司 | Method for accurately adjusting sludge concentration of aerobic tank of sewage plant |
| CN113248034A (en) * | 2021-07-13 | 2021-08-13 | 湖南省建筑科学研究院有限责任公司 | Continuous flow intermittent aeration control method for AAO (anaerobic-anoxic-oxic) process |
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| CN114409179A (en) * | 2021-12-22 | 2022-04-29 | 北京城市排水集团有限责任公司 | Biological denitrification control device and control method for sewage treatment plant |
| CN114790039A (en) * | 2022-05-27 | 2022-07-26 | 四川开泽环境科技有限公司 | Intelligent denitrification regulation and control method and system for aquaculture wastewater |
| CN115215438A (en) * | 2022-08-03 | 2022-10-21 | 中持水务股份有限公司 | Accurate aeration and dosing combined control method and system for multistage AO biochemical pool |
| CN116022924A (en) * | 2023-01-16 | 2023-04-28 | 中原环保股份有限公司 | In-situ accurate biological denitrification sewage treatment control method |
| WO2023184491A1 (en) * | 2022-04-01 | 2023-10-05 | 中山大学 | Denitrification strengthening method and device |
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