CN106277357B - The starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist - Google Patents
The starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist Download PDFInfo
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- 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
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/004—Apparatus and plants for the biological treatment of water, waste water or sewage comprising a selector reactor for promoting floc-forming or other bacteria
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
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- C02F2209/14—NH3-N
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- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The present invention provides the starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist: sludge of the inoculation in short distance nitration and anaerobic ammonia oxidation reactor first, under conditions of intermittent aerating, influent ammonium concentration is stepped up to be started, again by shortening the anaerobic stages time, aeration mode is changed into continuous aeration mode, to realize that one-step autotrophic nitrogen removal system starts.After starting successfully, stable Bacterial community is constructed by controlling cotton-shaped and granule sludge ratio method, and reaction time is adjusted according to running situation, realize the efficient denitrification of system.Starting mode provided by the invention is simple rapidly, and constructed system run all right is efficient, has important references meaning to one-step autotrophic nitrogen removal system and other cotton-shaped operations with granule sludge symbiotic system.
Description
Technical field
The invention belongs to bio-denitrifying sewage fields, and in particular to the autotrophy that a kind of floc sludge and granule sludge coexist is de-
Nitrogen system starting and efficient operation method.
Background technique
With the rapid development of our country's economy, water pollution is increasingly severe, and nitrogen is the major pollutants of eutrophication,
Having on water body environment influences greatly.Currently, municipal sewage plant mostly uses A2The denitrification process such as/O, oxidation ditch.But by
Additional organic carbon source is needed in traditional denitrification process, consumes a large amount of basicity and the energy.
Autotrophic denitrification refers to ammonium oxidation through ammonia oxidizing bacteria (AOB) into nitrite nitrogen, anaerobic ammonia oxidizing bacteria
(AAOB) again by the AOB nitrite nitrogen generated and remaining mineralized nitrogen at nitrogen, sewage water denitrification processing is realized.From Hipper
Since century the nineties propose one-step autotrophic nitrogen removal, due to its whole process autotrophic, it has been not necessarily to additional organic carbon source, it is raw relative to tradition
The advantages that object denitrification process aeration quantity is smaller, can be suitable for a variety of reactors, it is considered to be the reason of energy-efficient denitrification process
Want to select, there is good development prospect.But at this stage since the starting period of whole process autotrophic denitrification system is longer, flora
Structure is complicated, it is difficult to which the operation for realizing stability and high efficiency hinders the application and development of the technique in practice.In recent years, anaerobism
Ammonium oxidation granular sludge is not susceptible to the hot spot that sludge bulking has become research because it has many advantages, such as that the rate of settling is fast.Due to
Simple anaerobic ammonium oxidation granular sludge is difficult to adapt to aerobic environment, can consume dissolved oxygen by the way that floc sludge is added, can
Impact of the AAOB by dissolved oxygen is protected, while also AAOB is metabolized necessary matrix to the nitrite nitrogen generated.Therefore pass through into
Ripe short distance nitration sludge and anaerobic ammonium oxidation sludge can not only realize the quick start of the technique, while diversified flora
Form also improves the stability of system, is conducive to the fast-growth of different floras, for realizing the fast of self-supported denitrification reactor
Speed starting and its efficient stable operation have a very important significance.
Summary of the invention
Start the object of the present invention is to provide the autotrophic denitrification system that a kind of floc sludge and granule sludge coexist and efficient
Operation method can be realized cotton-shaped in Full Autotrophic Ammonium Removal Process and granule sludge stabilization and coexist and cooperate with efficient denitrification,
It is simple and easy, and the denitrification system that other cotton-shaped and particles coexist also has certain applicability.
To achieve the goals above, The technical solution adopted by the invention is as follows:
1. the starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist, using sequence batch
Formula reactor, includes the following steps:
1) setting of cotton-shaped and granule sludge inoculative proportion:
Seed sludge is in the granule sludge and short distance nitration reactor in the anaerobic ammonia oxidation reactor of stable operation
Floc sludge, floc sludge concentration be 3-4g/L, ammonia nitrogen removal load be 0.35kgN/m3/ d, granule sludge concentration are 4-
5g/L, anaerobic ammoxidation activity 0.22gN/gMLVSS/d.The mass ratio of floc sludge and granule sludge is 2-3 when inoculation；
2) cotton-shaped and granule sludge symbiotic system intermittent aerating becomes matrix startup stage:
Water inlet is using the simulated wastewater manually prepared, and inlet flow-patterm control is in 7.4-8.2, and temperature is 28-32 DEG C, and dissolved oxygen is dense
Degree be 1.0-1.2mg/L, reaction time 12h；System uses intermittent aerating mode, is aerated section and the ratio of anaerobism section time is
1:2；Control influent ammonia nitrogen mass concentration first is 100mg/L, when mineralized nitrogen rate reaches 85% or more, improves influent ammonia nitrogen
Mass concentration, the amplitude improved every time are 20mg/L；When influent ammonia nitrogen mass concentration reaches 200mg/L, ammonia nitrogen removal frank continuous 3
When it reaches 85%, intermittent aerating becomes matrix phase start completion；
3) cotton-shaped and granule sludge symbiotic system becomes aeration time startup stage:
It is 200mg/L that this stage, which keeps influent ammonium concentration, shortens the anaerobism section time, and reduction amplitude is 1-2h, is pressed simultaneously
The amplitude reduction aeration quantity of 10%-15%；Every time after adjustment, restore respectively to mineralized nitrogen rate and nitrogen removal rate to 85% He
75%, and stablize 2-4 days, then adjusted next time, it is 0h until the anaerobism section time, reactor switchs to continuous aeration operation mould
Formula, i.e. aeration time transitional stage start completion；
4) cotton-shaped and granule sludge symbiotic system sludge ratio regulates and controls the efficient operation stage:
Into after the cotton-shaped and high efficiency particulate operation phase, the sedimentation time is set as 8-12min, speed of agitator 80-
100rpm/min controls floc sludge and granule sludge mass ratio between 2.02-2.31, and influent ammonium concentration continues to keep
200mg/L, if water outlet nitrite nitrogen concentration is greater than 20mg/L, and when mineralized nitrogen rate is less than 85%, by the amplitude of 10%-20%
Reduce aeration quantity；If being discharged nitrite nitrogen concentration is less than 20mg/L, but when mineralized nitrogen rate is less than 85%, by 10%-20%'s
Amplitude increases aeration quantity；When cotton-shaped and granule sludge ratio is less than 2.02, the increase sedimentation time to 12-15min, while will go out
Floc sludge in water tank, which returns, adds to reactor；When cotton-shaped and granule sludge ratio is greater than 2.31, shorten the sedimentation time extremely
4-8min, while stirring rate is increased into 110-130rpm/min.When mineralized nitrogen rate is greater than 90%, nitrogen removal rate is greater than
When 80%, reaction time reduces 1-2h.
The beneficial effects of the present invention are:
1. the present invention innovatively proposes to control cotton-shaped and granule sludge according to cotton-shaped and granule sludge interaction rule
The method of ratio is regulated and controled by sludge ratio, the sludge of different shape in system is made to maintain good growth conditions, system
It runs more stable.
2. the method for change aeration time proposed by the invention can effectively make anaerobic bacteria flora in system adapt to operating condition
Variation keeps the stabilization of system Bacterial community.
The method for reducing aeration quantity while 3. involved aeration time is reduced in the present invention is conducive to AAOB gradually
Adapt to aerobic environment.
4. starting proposed by the present invention and operation method can efficiently promote AOB in the enrichment and growth on granule sludge surface.
Oxygen can be consumed in the AOB of granule sludge surface enrichment, AAOB is protected to impact from oxygen, while the nitrous acid that AOB is generated
Salt also provides matrix for AAOB.
5. the ratio of seed sludge mentioned in the present invention is in conjunction with cotton-shaped, granule sludge concentration and its processing ammonia nitrogen
Ability is determined, the sludge of different shape is enable quickly to adapt to one-step autotrophic nitrogen removal system.
6. the present invention carries out the regulation of sludge ratio by sedimentation time and stirring rate, control ratio can be reached faster
Purpose.
7. present invention inoculation mature short distance nitration sludge and anaerobic ammonium oxidation sludge, sludge adaptability is stronger, starting
Time is shorter.
8. starting provided by the invention and efficient operation method compared with traditional wastewater biological denitrification process, do not need additional
Organic carbon source is added, and required aeration quantity is lower, and operating cost is greatly saved.
9. the present invention is not only suitable for quick start of the one-step autotrophic nitrogen removal technique under high ammonia-nitrogen condition, it is also applied for simultaneously
Quick start of the technique in municipal sewage.
Detailed description of the invention
Fig. 1 is SBR experimental rig schematic diagram of the present invention；
Fig. 2 is present invention starting and efficient operation stage Inlet and outlet water NH4 +、NO2 -、NO3 -Mass concentration change curve；
Fig. 3 is present invention starting and efficient operation stage ammonia nitrogen and nitrogen removal rate change curve.
In figure: 1, water tank inlet；2, water inlet water pump；3, motor；4, water-bath layer water outlet；5, water-bath layer；6, aeration plate；7,
Water-bath layer water inlet；8, agitating paddle；9, effluent water pump；10, air pump；11, go out water tank.
Specific embodiment
Technical solution of the present invention is illustrated with embodiment with reference to the accompanying drawing.
Embodiment 1 is shown in Fig. 1 to Fig. 3:
The present invention provides the starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist,
Reactor is discharged every time using cylinder sbr reactor device made of machine glass, high 40cm, diameter 15cm, effective volume 4L
2L, reactor assembly include water tank inlet 1, water inlet water pump 2, motor 3, water-bath layer water outlet 4, water-bath layer 5, aeration plate 6, water-bath
Layer water inlet 7, effluent water pump 9, air pump 10, goes out water tank 11 (attached drawing 1) at agitating paddle 8, using periodic training method, packet
Include following steps:
1) setting of cotton-shaped and granule sludge inoculative proportion:
Seed sludge is the short distance nitration floc sludge and anaerobic ammonium oxidation granular sludge of laboratory cultures maturation, nitrogen of intaking
Load is respectively that its ammonia nitrogen removal load is 0.35kgN/m3/ d, anaerobic ammoxidation activity 0.22gN/gMLVSS/d, by quality
Than mixing short distance nitration floc sludge and anaerobic ammonium oxidation granular sludge for 2, inoculation total volume is 1.2L；
2) cotton-shaped and granule sludge symbiotic system intermittent aerating becomes matrix startup stage:
Water inlet uses artificial distribution, by NH4Cl、NaNO2With NaHCO3It is formulated, influent ammonium concentration 100mg/L,
Phosphate concn is 2-4mg/L, pH 7.56-8.07, and aeration uses air compressor air inlet, is controlled and is aerated by spinner flowmeter
Amount controls reaction temperature at 28-32 DEG C, and the hydraulic detention time of initial start stage is set according to the original state of seed sludge
Fixed, reaction time, 12h, was divided into aeration phase and anaerobic stages, and runing time is respectively 4h and 8h, and aeration quantity is initially set
1.1L/min.The 1st day started after seed sludge, mineralized nitrogen rate only has 65%, is stepped up from the 3rd day, to the 5th
It, mineralized nitrogen rate alreadys exceed 85%.Continue thereafter with raising system influent ammonium concentration.Mineralized nitrogen rate is equal after adjustment every time
There is a degree of decline, when fall maximum is reduced to 68%, is kept at 70% substantially in this stage mineralized nitrogen rate
More than.The time that system mineralized nitrogen rate reaches 85% or more again is generally 2-4 days, and recovery time is shorter, is initiated through 35
It, aeration quantity is adjusted to 0.8L/min in reactor, and mineralized nitrogen rate reaches 90% or more, into next stage；
3) cotton-shaped and granule sludge symbiotic system becomes aeration time startup stage:
After stable in two days, the 37th day anaerobism time was reduced to 4h, and ammonia nitrogen removal frank still reaches 88%, two days one later
Directly it is maintained at 85% or more.39th day, the anaerobism section time is reduced to 2h, after adjustment one day, ammonia nitrogen removal frank reaches 91%.The
Aeration mode is completely transformed into continuous aeration mode within 41 days.Reactor is suitably turned down after the reduction anaerobism section time every time at the same time
Aeration quantity.In order to guarantee the stabilization of system, aeration quantity is adjusted according to the amplitude of 10-15%, and to the last aeration quantity drops to
0.6L/min.Mineralized nitrogen rate remains at 85% or more within 45th day, and nitrogen removal rate is 80% or more, it is believed that stage success
Starting, into the efficient operation stage；
4) cotton-shaped and granule sludge symbiotic system sludge ratio regulates and controls the efficient operation stage:
This stage influent ammonium concentration is 180-220mg/L, and reactor aeration quantity maintains wadding between 0.4-0.6L/min
The mass ratio of shape sludge and granule sludge is between 2.02-2.23.Operation to the 46th day, ammonia nitrogen removal frank be maintained at 85% with
On, the reactor cycle of operation is shorten to 11h, to maintain efficient denitrogenation purpose.Mineralized nitrogen rate changes not after adjustment
Greatly, between 80%-90%.At the 48th day, floc sludge amount was reduced in system, the mass ratio drop of floc sludge and granule sludge
Low 1.95, logical to extend to 13min the sedimentation time, mixing speed is set as 110rpm/min simultaneously for the floc sludge weight of discharge
Newly it is added back in reactor.2.02 or more are restored in the mass ratio of the 52nd day floc sludge and granule sludge.Entire efficiently fortune
Between the departure date, water outlet ammonia nitrogen, nitrite nitrogen and nitrate are lower, and mineralized nitrogen rate is maintained at 85% or more, total nitrogen removal
Rate substantially remains in 75% or more.53rd day, the reactor cycle of operation foreshortened to 9h, and mineralized nitrogen rate is reduced to 82%, at this time
Increase dissolved oxygen to 0.5mg/L.It runs to the 55th day, mineralized nitrogen rate is restored to 90%, nitrogen removal rate 85%.Hereafter every
The secondary runing time for shortening 1h.By the 74th day, the reactor period was 4h, dissolved oxygen concentration 0.49-0.55mg/L, system total nitrogen
Elimination capacity is stablized in 2.4-2.7kgN/m3Between/d.
In experimentation, to reactor start-up and efficient operation stage Inlet and outlet water NH4 +、NO2 -、NO3 -Mass concentration change into
Tracking and testing is gone, the results are shown in attached figure 2；Starting and efficient operation stage ammonia nitrogen and nitrogen removal rate situation of change are shown in attached drawing 3.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although above-described embodiment to the present invention into
Gone detailed description, the related technical personnel of this field it is understood that can modify to the present invention or replace on an equal basis, but
Any modification and part replacement for not departing from spirit and scope of the invention should all be covered in scope of the presently claimed invention.
Claims (1)
1. the starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist, anti-using batch-type
Answer device, characterized by the following steps:
1) setting of cotton-shaped and granule sludge inoculative proportion:
Of the seed sludge in the floc sludge and anaerobic ammonia oxidation reactor in the short distance nitration reactor of stable operation
Grain sludge, floc sludge concentration are 3-4g/L, and granule sludge concentration is 4-5g/L, the matter of floc sludge and granule sludge when inoculation
Amount is than being 2-3；
2) cotton-shaped and granule sludge symbiotic system intermittent aerating becomes matrix startup stage:
Water inlet is using the simulated wastewater manually prepared, and in 7.4-8.2, temperature is 28-32 DEG C for inlet flow-patterm control, and control aeration quantity is not
Become, reaction time 12h；System uses intermittent aerating mode, is aerated section and the ratio of anaerobism section time is 1:2；It keeps first
Influent ammonia nitrogen mass concentration is constant, when mineralized nitrogen rate reaches 85% or more, improve influent ammonia nitrogen mass concentration, every time according to
Certain amplitude is improved；When influent ammonia nitrogen mass concentration reaches initial 180%-220%, ammonia nitrogen removal frank reaches for three days on end
When to 85%, intermittent aerating becomes matrix phase start completion；
3) cotton-shaped and granule sludge symbiotic system becomes aeration time startup stage:
This stage keeps influent ammonium concentration constant, shortens the anaerobism section time, while reducing aeration quantity；Every time after adjustment, to ammonia
Conversion rate of nitrogen and nitrogen removal rate restore respectively to 85% and 75%, and stablize 2-4 days, then adjusted next time, until anaerobism
The section time is 0h, and is stablized 4 days, into the efficient operation stage；
4) cotton-shaped and granule sludge symbiotic system sludge ratio regulates and controls the efficient operation stage:
Into after the cotton-shaped and granule sludge symbiotic system ratio regulation efficient operation stage, the sedimentation time is set as 8-12min, stirs
Mixing revolving speed is 80-100r/min, controls floc sludge and granule sludge mass ratio between 2.02-2.31, influent ammonium concentration
It remains unchanged, according to water outlet nitrite nitrogen concentration and mineralized nitrogen rate, aeration quantity is adjusted；When cotton-shaped and granule sludge ratio
When example is less than 2.02, the increase sedimentation time to 12-15min, while floc sludge time in water tank will be gone out and add to reactor；Work as wadding
When shape and granule sludge ratio are greater than 2.31, the shortening sedimentation time to 4-8min, while stirring rate is increased into 110-130r/
Min,
When mineralized nitrogen rate is greater than 90%, and nitrogen removal rate is greater than 80%, reaction time reduces 1-2h.
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| CN107032488B (en) * | 2017-04-24 | 2020-07-31 | 北京工业大学 | Method for realizing short-cut nitrification of municipal sewage through sludge double-reflux AOA (argon oxygen decarburization) process |
| CN107265639B (en) * | 2017-07-01 | 2020-04-28 | 清华大学 | Integrated split-phase combined wastewater denitrification device and wastewater denitrification method |
| CN108408897B (en) * | 2018-03-13 | 2020-10-13 | 北京工业大学 | Integrated short-cut nitrification anaerobic ammonia oxidation and phosphorus removal intermittent aeration real-time control method |
| CN109354172B (en) * | 2018-12-05 | 2020-02-07 | 青岛思普润水处理股份有限公司 | MBBR-based CANON system quick start method |
| CN109354173B (en) * | 2018-12-05 | 2023-06-16 | 青岛思普润水处理股份有限公司 | CANON system based on MBBR and operation method |
| CN109761352A (en) * | 2019-01-29 | 2019-05-17 | 北京首创股份有限公司 | The aerobic particle mud processing method of energy stability and high efficiency processing low-carbon-source sewage |
| CN111517460A (en) * | 2020-04-13 | 2020-08-11 | 上海应用技术大学 | Domestication method of anaerobic granular sludge |
| CN112939213B (en) * | 2021-04-01 | 2023-01-31 | 北京工业大学 | Rapid CANON granular sludge starting method based on hydraulic screening intermittent starvation |
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| CN103043788A (en) * | 2013-01-04 | 2013-04-17 | 哈尔滨工业大学 | Cultivation method of anammox granular sludge |
| CN104529056A (en) * | 2014-11-29 | 2015-04-22 | 北京工业大学 | Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge |
| CN105016468A (en) * | 2015-08-03 | 2015-11-04 | 哈尔滨工业大学 | AOB-AnAOB (ammonia oxidizing bacteria-anaerobic ammonia oxidizing bacteria) granular sludge and preparation method thereof as well as method for treating wastewater by using autotrophic nitrogen removal of AOB-AnAOB granular sludge |
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| CN103043788A (en) * | 2013-01-04 | 2013-04-17 | 哈尔滨工业大学 | Cultivation method of anammox granular sludge |
| CN104529056A (en) * | 2014-11-29 | 2015-04-22 | 北京工业大学 | Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge |
| CN105016468A (en) * | 2015-08-03 | 2015-11-04 | 哈尔滨工业大学 | AOB-AnAOB (ammonia oxidizing bacteria-anaerobic ammonia oxidizing bacteria) granular sludge and preparation method thereof as well as method for treating wastewater by using autotrophic nitrogen removal of AOB-AnAOB granular sludge |
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