CN202688093U - Improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device - Google Patents
Improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device Download PDFInfo
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- CN202688093U CN202688093U CN 201220204035 CN201220204035U CN202688093U CN 202688093 U CN202688093 U CN 202688093U CN 201220204035 CN201220204035 CN 201220204035 CN 201220204035 U CN201220204035 U CN 201220204035U CN 202688093 U CN202688093 U CN 202688093U
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Abstract
The utility model relates to an improved A/O (anoxic/oxic) four-point section-water supply high-efficiency synchronous nitrogen and phosphorus removal device, belonging to the field of biochemical-process biological sewage treatment technology. Aiming at the characteristics of low pollutant concentration and low water inlet C/N existing in the low-concentration waste water, and the deficiencies that the traditional A/O technology is low in the utilization rate of the sewage carbon source, bad in synchronous nitrogen and phosphorus removal effect, higher in energy consumption and the like, an A/O process anoxic zone is changed into a front pre-anoxic denitrification zone and an oxic zone by additionally installing a partition wall, and sludge flows back to the pre-anoxic denitrification zone; a nitrification stage is improved into an A/O alternate operation mode, and raw water enters the anoxic zones and oxic zones by four points. The device comprises a sewage tank, a pre-anoxic reactor, an anoxic reactor, a first-zone oxic reactor, a second-zone anoxic reactor, a second-zone oxic reactor, a third-zone anoxic reactor, a third-zone oxic reactor and a settling pond which are connected sequentially, as well as a a water inlet system and a sludge return pipeline. The device can realize the high-efficiency synchronous nitrogen and phosphorus removal effects of low-concentration sewage.
Description
Technical field
The utility model relates to the device of 4 segmental influent high efficiency synchronous of a kind of A/O of improvement denitrogenation dephosphorizing, belong to technical field of biological sewage treatment by using, A/O technique anoxic section is increased partition wall one, become preposition pre-anoxic denitrification section and anaerobism section, sludge reflux is to pre-anoxic denitrification section; Nitrated stage improvement is anoxic/aerobic alternate run pattern, simultaneously former point of moisture is entered each anoxic section and anaerobism section, developed have the shorter water conservancy residence time, the utilization of carbon source rate is high synchronous denitrogen dephosphorus technology, be applicable to our large, medium and small type cities and towns low concentration sewage and the dephosphorization of trade effluent advanced nitrogen and process.
Background technology
At present, the biological treatment that moves in China's urban wastewater treatment firm is with A
2/ O, SBR, OD take as the leading factor, yet the single sludge treating system of this quasi-tradition causes nitrate in the contradiction, returned sluge of mud Elderly to the impact of anaerobic phosphorus release and has the long reasons such as HRT owing to autotrophic bacteria and heterotrophic bacterium mixed growth, cause system not high to the water-inlet carbon source effective rate of utilization, be difficult to reach efficient, the steady removal of nitrogen phosphorus, increased simultaneously capital construction and working cost.Especially our southern town exists lower Pollutant levels even the sanitary sewage of low C/N, has increased especially the difficulty of sewage disposal plant effluent qualified discharge.As seen how shortening the HRT of system on existing basis is an approach that solves low concentration wastewater even low C/N waste water nitrogen phosphorus efficiency steady removal to improve influent load, how to improve the water-inlet carbon source utilization ratio.
(1) traditional Prepositive denitrification (A/O) technique
A/O (anoxic/aerobic) biological denitrification process was developed in early 1980s, was a kind of biological denitrification process that present municipal sewage plant extensively adopts.Carbonaceous organic material in this technology utilization sewage can effectively be removed COD and nitrogenous compound as denitrifying carbon source.The technical process of A/O biological denitrificaion is as follows, and raw waste water at first enters anoxic pond, and the organism in the sewage is as electron donor therein, and the nitric nitrogen of inner circulating reflux is sent out denitrogenation nitrated, and organism is tentatively explained; Enter Aerobic Pond, the nitration reaction ammonia nitrogen occurs and is removed in the therein further degraded of organism simultaneously again; Part mud after the last nitrated mixed solution of Aerobic Pond and the precipitation is back to anoxic pond simultaneously, makes anoxic pond can obtain sufficient organic carbon source from former water, can obtain a large amount of nitric nitrogens from reflux again, thereby carry out denitrification.
A/O technique has following features: flow process is simple, saved the intermediate sedimentation pond, and structures are few, greatly saved capital cost, and working cost is lower simultaneously, and power consumption is lower, and floor space is little; Aerobic Pond can further be removed the denitrification residual organic matter after anoxic pond; Anoxic pond because denitrification has consumed most of organic carbon source, was conducive to alleviate the organic loading of Aerobic Pond before Aerobic Pond, reduce the oxidation of coal oxygen requirement of Aerobic Pond; The basicity that denitrification produces can the additional nitration process to the consumption of basicity; A/O technique only has a sludge system, and anoxic pond played the effect of biological selector before Aerobic Pond, and what active sludge replaced is in aerobic and anoxic condition, is beneficial to control sludge bulking; In addition, because system architecture is simple, be easy to reconstruct in the conventional activated sludge system, needn't increase more facility and equipment.
Owing to being subjected to the when impact of reflux ratio of water-inlet carbon source, internal recycle, A/O technique nitric efficiency is very low, is generally about 60%; The A/O Effect Factors for Sythetic Technology is more in addition, need to carry out nitrification liquid internal reflux, sludge reflux and aeration aerating, and energy consumption and working cost are higher.
(2) subsection water inflow A/O deep denitrogenation process
Step Feed Biological Nitrogen Removal Process is usually by 2～4 sections anoxics/aerobic arranged sequentially composition.Former water enters reactor in the oxygen-starved area of each section respectively, and returned sluge is back to the head end of system, does not usually establish the internal reflux facility.
Denitrification is mainly carried out to the NOx--N in the returned sluge in the oxygen-starved area of first paragraph, and simultaneously, the sewage (Q1) that enters this district provides carbon source for denitrification.Then, the aerobic zone that mixed solution flows into first paragraph carries out nitration reaction, and reacted combined sewage flow into the oxygen-starved area of second segment and carries out denitrification, and simultaneously, the sewage that the second segment oxygen-starved area enters (Q2) provide carbon source for denitrification.The aerobic zone that mixed solution enters into second segment again carries out nitration reaction, and each section by that analogy later on.Because nitration reaction has only occured in the sewage that final stage enters, and does not have denitrifying condition, so water outlet will contain certain nitric nitrogen.Therefore, the water outlet total nitrogen there is the sewage treatment project of strict demand, can considers that final stage does not add sewage, only add outer carbon source, and strengthen aeration rate at last aerobic zone, to remove the carbon organism.
In subsection water inflow A/O system, anoxic/aerobic arranged sequentially can be created suitable environment for the growth of denitrifying bacteria, nitrifier, its essence is the series connection of a plurality of A/O.Anoxic/aerobic alternately layout, the organic carbon source that can take full advantage of in the former water carries out denitrification, at each section nitration denitrification completely in the situation, water outlet TN concentration is determined by the flooding quantity of final stage, this just provides possibility for advanced nitrogen, in the end one section flooding quantity is enough little, perhaps adds in the situation of a small amount of carbon source, can reach water outlet TN less than the treatment effect of 1mg/L.Anoxic/aerobic replacing also so that system need not to arrange internal circulation system, and internal circulation system not only increases the construction investment of project, and need to consume a large amount of energy during operation, the real-time control of internal recycle flow also is a more scabrous difficult problem of the efficient operation of A/O.Subsection water inflow A/O process form determines that it has following features:
(1) anoxic/aerobic is alternately arranged, saves the nitrification liquid internal reflux facility of traditional A/O technique, and the carbon source that can take full advantage of in the former water carries out denitrification, and is especially favourable to the efficient denitrification of low C/N city domestic sewage.
(2) because sewage disperses to enter each section, its total diluting effect is postponed, system's each section concentration of suspension (MLSS) distribution gradient.Compare with traditional A/O technique or other single-stage denitrification process, in the situation that it is identical to flow into final deposition pool MLSS, subsection water inflow A/O technique has more mud reserves and long solid retention time than conventional nutrient removal technique, and does not increase the second pond solid loading.Different water entries and different influent flow rate distribution ratios are set, can make the subsection water inflow A/more common A/O of the average MLSS of O process system system increase by 35%～70%, thereby increased the processing power that the unit pond holds, greatly reduce the required pond of denitrogenation and hold.
(3) oxygen-starved area water inlet can take full advantage of the readily biodegradable COD in the former water on the one hand, for denitrification provides carbon source, saves outer carbon source dosage; In addition, oxygen-starved area water inlet, a large amount of carbon source utilized of denitrification consumption, so that it is less to enter the carbon source utilized of aerobic zone, the growth of heterotrophic bacterium is restricted, and is beneficial to the growth of Autotrophic nitrification bacterium;
(4) oxygen-starved area and aerobic zone alternately exist, and therefore, the basicity that consumes when the basicity that the oxygen-starved area denitrification produces is nitrated to aerobic zone has certain replenishing, and can avoid the situation of nitrated basicity deficiency to occur; In addition, anoxic, aerobic alternately layout, every section oxygen-starved area is equivalent to the selector switch of a high loading, but the establishment Filamentous Bulking.
(5) because sewage disperses to enter reaction tank, system's capacity of resisting impact load strengthens.In addition, to combined drainage system, when heavy rain produces peak discharge, by the adjustment to distribution ratio of liquid flow, can effectively avoid mud to wash away loss.
The utility model content
Present traditional Prepositive denitrification A/O technique urgent problem is how to realize the biological high-efficiency nitrogen removal performance, how to improve the water-inlet carbon source utilization ratio simultaneously; And the anxious problem that faces of subsection water inflow A/O deep denitrogenation process is how to realize the synchronous biological dephosphorize performance, how to solve in the returned sluge nitrate to the impact of anaerobic phosphorus release in reinforced phosphor-removing.The purpose of this utility model is in order to solve above-mentioned two large technical problems, propose a kind of process unit and method of processing the high efficiency synchronous denitrogenation dephosphorizing of lower concentration even low C/N town domestic sewage, namely efficiently utilize the segmental influent strategy of former water carbon source and the associating of synchronous denitrification dephosphorizing technology.
4 segmental influent high efficiency synchronous of improvement A/O denitrification dephosphorization apparatus, this device comprises: the sewage water tank that connects in turn, pre-anoxic reacter, anaerobic reactor, first paragraph aerobic reactor, second segment anoxic reacter, second segment aerobic reactor, the 3rd section anoxic reacter, the 3rd section aerobic reactor and settling tank are communicated with pre-anoxic reacter, anaerobic reactor, first paragraph aerobic reactor, second segment anoxic reacter, second segment aerobic reactor, the 3rd section anoxic reacter, the 3rd section aerobic reactor by the dividing plate that is provided with communicating pipe; The sewage water tank connects respectively pre-anoxic reacter, anaerobic reactor, second segment anoxic reacter and the 3rd section anoxic reacter by four pumps, and pre-anoxic reacter, anaerobic reactor, second segment anoxic reacter and the 3rd section anoxic reacter are all installed agitator; The settling tank bottom is connected to the sludge reflux pipeline of pre-anoxic reacter by returned sluge control valve and sludge reflux pump; Each aerobic reactor bottom is provided with sand head aerator, and air compressor is communicated with sand head aerator by gas meter, air control valve, and sand head aerator, air control valve, gas meter and air compressor form aerating system jointly; Each aerobic reactor is provided with dissolved oxygen concentration Monitoring and Controlling instrument;
(1) pre-anoxic reacter 2: the city domestic sewage that extracts through intake pump 11 and sludge reflux pump 17 enter pre-anoxic device 2 simultaneously from the muddy water mixed solution of settling tank 9 bottoms extraction, denitrifying bacterium utilizes the organic carbon source that enters in the former water of pre-anoxic device to carry out denitrification denitrogenation under the stirring action of agitator 12, finish the overwhelming majority removal to the nitrate that carries in the returned sluge, be beneficial to the anaerobic phosphorus release of follow-up polyP bacteria.By the setting of preposition pre-anoxic reacter 2, can effectively solve the entrained nitrate of returned sluge in traditional single sludge system and polyP bacteria anaerobic phosphorus release simultaneously to the competition of carbon source.
(2) anaerobic reactor 3: enter simultaneously anaerobic reactor 3 through the mixed solution water outlet behind the pre-denitrification and denitrogenation in city domestic sewage that intake pump 11 extracts and pre-anoxic reacter 2, under the stirring action of anaerobic reactor 3 interior stirrers 12, finish polyP bacteria and absorb biodegradable organic in the former water, form with internal carbon source PHB is stored in the polyP bacteria body, discharges simultaneously a large amount of solvability orthophosphoric acid salt.
(3) the first paragraph aerobic reactor 4: anaerobic reactor 3 goes out water mixed liquid and directly enters first paragraph aerobic reactor 4, provides aeration by aerating system, the remaining few organism of heterotrophic bacterium oxidation, and nitrifier is with NH
4 +-N is converted into NO
x-N, polyP bacteria comprise that Denitrifying Phosphate Accumulating Organisms finishes aerobic suction phosphorus process.The size of aeration rate uses gas meter 15 to adjust according to DO instrument on-line monitoring and running status Inlet and outlet water situation, control first paragraph aerobic reactor 4 water outlet NH
4 +-N is at 0～3mg/L, if water outlet NH
4 +-N exceeds this scope, will adjust aeration rate, guarantees nitrification effect.
(4) the second segment anoxic reacter 5: the city domestic sewage and first paragraph aerobic reactor 4 nitrification liquids that extract through intake pump 11 enter second segment anoxic reacter 5, heterotrophic denitrifying Bacteria utilization water inlet organic carbon source carries out denitrification denitrogenation under the stirring action of agitator 12, follow simultaneously the part Denitrifying Phosphate Accumulating Organisms to utilize nitrate as electron donor, realize phosphatic absorption.
(5) the second segment aerobic reactor 6: function is with first paragraph aerobic reactor 4, second segment anoxic reacter 5 goes out water mixed liquid and directly enters second segment aerobic reactor 6, provide aeration by aerating system, finish the aerobic absorption of the nitrated and phosphorus of remaining few organic oxidation removal and ammonia nitrogen.
(6) the 3rd sections anoxic reacters 7: function is with second segment anoxic reacter 5, the city domestic sewage and second segment aerobic reactor 6 nitrification liquids that extract through intake pump 11 enter the 3rd section anoxic reacter 7, heterotrophic denitrifying Bacteria utilizes entering organic matter of water to carry out anti-nitration reaction under the stirring action of agitator 12, follows simultaneously the absorption of portion phosphate.
(7) the 3rd sections aerobic reactors 8: function is with first paragraph aerobic reactor 4 and second segment aerobic reactor 6, the 3rd section anoxic reacter 7 goes out water mixed liquid and directly enters the 3rd section aerobic reactor 8, provide aeration by aerating system, finish the aerobic absorption of the nitrated and phosphorus of remaining few organic oxidation removal and ammonia nitrogen.
(8) 9: the three sections aerobic reactor 8 mixed solutions of settling tank enter settling tank 9 by effluent weir 20 and carry out mud-water separation, supernatant liquor effluxes, sludge settling is at sludge bucket, be promoted to pre-anoxic reacter 2 through sludge reflux control valve 18 and sludge reflux pump 17, the residue precipitating sludge is discharged through mud discharging control valve 19 as excess sludge.
The device of the high efficiency synchronous denitrification dephosphorization technique that the utility model relates to compared with prior art has the following advantages:
(1) sludge concentration that system is higher has increased the unit pond and has held processing power, and the HRT that can shorten system processes load to improve; Compare with conventional continuous flow process, system HRT can foreshorten to 8-9h, has realized processing low concentration wastewater reaches the high efficiency synchronous denitrogenation dephosphorizing by the method that improves load effect.
(2) compare with Continuous Flow Prepositive denitrification A/O technique, by former moisture section being entered each section anaerobic reactor or anoxic reacter is put phosphorus and anti-nitration reaction, improved the utilization ratio of former water carbon source, therefore need not the high-efficiency biological nitrogen and phosphorus removal that additional carbon can be realized sewage, broken through the bottleneck that low C/N sewage denitrification and dephosphorization efficient is difficult to improve.
(3) compare with subsection water inflow A/O deep denitrogenation process, this technique has realized the function of biological phosphate-eliminating by first section anaerobic reactor is set, and has increased the actual application value of step feed technology, be conducive to the regeneration of sewage, prevent the generation of body eutrophication; Simultaneously pre-anoxic denitrification pond is set before anaerobic reactor, and shunts 20% former water and enter pre-anoxic reacter, effectively solve in the returned sluge nitrate to the impact of anaerobic phosphorus release.
Description of drawings
Fig. 1 is 4 segmental influent high efficiency synchronous of improvement A/O denitrification dephosphorization apparatus schema.
Fig. 2 is 4 step feed technology main bodys of improvement A/O reactor vertical view.
Among the figure: 1---the sewage water tank; 2---pre-anoxic reacter; 3---anaerobic reactor; 4---the first paragraph aerobic reactor; 5---the second segment anoxic reacter; 6---the second segment aerobic reactor; 7---the 3rd section anoxic reacter; 8---the 3rd section aerobic reactor; 9---settling tank; 10---water outlet; 11---intake pump; 12---agitator; 13---sand head aerator; 14---air control valve; 15---spinner-type flowmeter; 16---air compressor; 17---sludge reflux pump; 18---the returned sluge control valve; 19---the excess sludge discharge control valve; 20---overflow port; 21---the agitator slot.
Embodiment
Below in conjunction with accompanying drawing and example in detail the utility model patent:
As shown in Figure 1, the device of 4 segmental influent high efficiency synchronous of improvement A/O denitrification dephosphorization technique, comprise: the sewage water tank 1 that connects in turn, pre-anoxic reacter 2, anaerobic reactor 3, first paragraph aerobic reactor 4, second segment anoxic reacter 5, second segment aerobic reactor 6, the 3rd section anoxic reacter 7, the 3rd section aerobic reactor 8 and settling tank 9, the dividing plate by being provided with communicating pipe is with pre-anoxic reacter 2, anaerobic reactor 3, first paragraph aerobic reactor 4, second segment anoxic reacter 5, second segment aerobic reactor 6, the 3rd section anoxic reacter 7, the 3rd section aerobic reactor 8 UNICOMs; Sewage water tank 1 connects respectively pre-anoxic reacter 2, anaerobic reactor 3, second segment anoxic reacter 5 and the 3rd section anoxic reacter 7 by four pumps, and pre-anoxic reacter 2, anaerobic reactor 3, second segment anoxic reacter 5 and the 3rd section anoxic reacter 7 reactors are all installed agitator 12; Be back to the sludge reflux pipeline of pre-anoxic reacter 2 by returned sluge control valve 18 and sludge reflux pump 17 from settling tank 9 bottoms; Each aerobic reactor bottom is provided with sand head aerator 13, air compressor 16 is communicated with sand head aerator 13 by gas meter 15, air control valve 14, sand head aerator 13, air control valve 14, gas meter 15 and the air compressor 16 common aerating systems that form; Each aerobic reactor is provided with dissolved oxygen concentration Monitoring and Controlling instrument.
The useful volume of sewage water tank 1 is 185L, testing selected trial model is single gallery type rectangular reactor, useful volume is 67L, be divided into 7 lattice chamber operations: first lattice chamber is pre-anoxic reacter 2(7L), second lattice chamber is anaerobic reactor 3(12L), and then be first paragraph aerobic reactor 4(12L), then be second segment anoxic reacter 5(9L successively), second segment aerobic reactor 6(9L), the 3rd section anoxic reacter 7(9L), the 3rd section aerobic reactor 8(9L).Settling tank 9 useful volumes are 33L, centered by the water inlet peripheral effluent radical sedimentation basin.Stirrer 12 is installed respectively to keep mud to be in suspended state at anaerobic reactor and anoxic reacter, aerating system arrives pressurized air in first paragraph aerobic reactor 4, second segment 6 aerobic reactors and the 3rd section aerobic reactor 8 through supply air line, the aerobic device dissolved oxygen concentration of each section bloats degraded and the microorganism growth that micro bubble satisfies pollutent by spinner-type flowmeter 15 regulating and controlling by sand head aerator 13.Water inlet, mud external reflux promote metering by intake pump 11, sludge reflux pump 17 respectively, and each reactor separates by dividing plate, and dividing plate is provided with communicating pipe to prevent the air-teturning mixed phenomenon of mixed solution.
Example
Take the cyclone-type sand precipitating pool water outlet of city of Jiangsu province sewage work as processing object (COD=89-200mg/L, TN=22-42mg/L, TP=2.2-6.7 mg/L, C/N=2.18-6.2, C/P=21.2-78.8), hydraulic detention time 8.7h, sludge age 10-15d, average sludge concentration 5600 mg/L, return sludge ratio 50%-75%, temperature is controlled at 20-22 ℃ by heating rod, and anaerobic/anoxic/aerobic volume ratio is 4:8:10.Test-results shows, system's optimum flow partition ratio is 20%:35%:35%:10%; COD, ammonia nitrogen, total nitrogen, total phosphorus effluent quality are respectively 33.05 mg.L under this operating mode
-1, 0.58 mg.L
-1, 9.26 mg.L
-1, 0.46 mg.L
-1, clearance is respectively 78.90%, 98.31%, 70.24%, 86.11%.
Claims (1)
1. device of improveing 4 segmental influent high efficiency synchronous of A/O denitrogenation dephosphorizing is characterized in that:
This device comprises: the sewage water tank that connects in turn, pre-anoxic reacter, anaerobic reactor, first paragraph aerobic reactor, second segment anoxic reacter, second segment aerobic reactor, the 3rd section anoxic reacter, the 3rd section aerobic reactor and settling tank are communicated with pre-anoxic reacter, anaerobic reactor, first paragraph aerobic reactor, second segment anoxic reacter, second segment aerobic reactor, the 3rd section anoxic reacter, the 3rd section aerobic reactor by the dividing plate that is provided with communicating pipe; The sewage water tank connects respectively pre-anoxic reacter, anaerobic reactor, second segment anoxic reacter and the 3rd section anoxic reacter by four pumps, and pre-anoxic reacter, anaerobic reactor, second segment anoxic reacter and the 3rd section anoxic reacter are all installed agitator; The settling tank bottom is connected to the sludge reflux pipeline of pre-anoxic reacter by returned sluge control valve and sludge reflux pump; Each aerobic reactor bottom is provided with sand head aerator, and air compressor is communicated with sand head aerator by gas meter, air control valve, and sand head aerator, air control valve, gas meter and air compressor form aerating system jointly; Each aerobic reactor is provided with dissolved oxygen concentration Monitoring and Controlling instrument.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708685A (en) * | 2014-01-14 | 2014-04-09 | 黑龙江工程学院 | Multi-segmented enhanced sewage denitriding device for use in villages and small towns in cold regions and process control method |
| CN104671605A (en) * | 2015-02-03 | 2015-06-03 | 江苏商达水务有限公司 | Effective integrated wastewater treatment process and device |
| CN105621615A (en) * | 2016-04-06 | 2016-06-01 | 北京工业大学 | Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device |
| CN106396105A (en) * | 2016-11-29 | 2017-02-15 | 中冶华天南京工程技术有限公司 | A multi-mode reaction tank for sewage treatment |
| CN110723818A (en) * | 2019-11-19 | 2020-01-24 | 中车环境科技有限公司 | Integrated equipment with enhanced dephosphorization and denitrification functions and control method thereof |
| CN111675336A (en) * | 2020-07-08 | 2020-09-18 | 北京信通碧水再生水有限公司 | Segmented water inlet multistage A/O process sludge expansion control system and method |
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2012
- 2012-05-08 CN CN 201220204035 patent/CN202688093U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103708685A (en) * | 2014-01-14 | 2014-04-09 | 黑龙江工程学院 | Multi-segmented enhanced sewage denitriding device for use in villages and small towns in cold regions and process control method |
| CN103708685B (en) * | 2014-01-14 | 2014-12-31 | 黑龙江工程学院 | Multi-segmented enhanced sewage denitriding device for use in villages and small towns in cold regions and process control method |
| CN104671605A (en) * | 2015-02-03 | 2015-06-03 | 江苏商达水务有限公司 | Effective integrated wastewater treatment process and device |
| CN105621615A (en) * | 2016-04-06 | 2016-06-01 | 北京工业大学 | Inverted A2/O step feed coupled aerobic particle sludge reinforced synchronous nitrification/denitrification dephosphorization device |
| CN105621615B (en) * | 2016-04-06 | 2018-01-19 | 北京工业大学 | Inversion A2/ O segmental influents coupling aerobic particle mud strengthens synchronous nitration denitrification denitrogenation dephosphorization apparatus |
| CN106396105A (en) * | 2016-11-29 | 2017-02-15 | 中冶华天南京工程技术有限公司 | A multi-mode reaction tank for sewage treatment |
| CN110723818A (en) * | 2019-11-19 | 2020-01-24 | 中车环境科技有限公司 | Integrated equipment with enhanced dephosphorization and denitrification functions and control method thereof |
| CN110723818B (en) * | 2019-11-19 | 2024-06-07 | 中车环境科技有限公司 | Integrated equipment with enhanced dephosphorization and denitrification functions and control method thereof |
| CN111675336A (en) * | 2020-07-08 | 2020-09-18 | 北京信通碧水再生水有限公司 | Segmented water inlet multistage A/O process sludge expansion control system and method |
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