CN108946927A - A kind of sludge fast culture process for realizing sewage Nitrite accumulation - Google Patents
A kind of sludge fast culture process for realizing sewage Nitrite accumulation Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000009825 accumulation Methods 0.000 title claims abstract description 28
- 239000010865 sewage Substances 0.000 title claims abstract description 28
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 title claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 31
- 241001453382 Nitrosomonadales Species 0.000 claims abstract description 27
- 238000011282 treatment Methods 0.000 claims abstract description 27
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 26
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- 241000894006 Bacteria Species 0.000 claims abstract description 18
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006228 supernatant Substances 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 12
- 239000011734 sodium Substances 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 206010002660 Anoxia Diseases 0.000 claims description 7
- 241000976983 Anoxia Species 0.000 claims description 7
- 206010021143 Hypoxia Diseases 0.000 claims description 7
- 230000007953 anoxia Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 7
- 238000005188 flotation Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 6
- 238000003760 magnetic stirring Methods 0.000 claims description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 5
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 3
- 239000002028 Biomass Substances 0.000 claims description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Chemical compound OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 2
- 230000005389 magnetism Effects 0.000 claims description 2
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims description 2
- 239000010801 sewage sludge Substances 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 abstract description 15
- 230000002401 inhibitory effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000006396 nitration reaction Methods 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 108090000913 Nitrate Reductases Proteins 0.000 description 1
- VXGTWXODBSDXAC-UHFFFAOYSA-M [O-]N=O.[O-][N+]([O-])=O.N.[NH6+3] Chemical compound [O-]N=O.[O-][N+]([O-])=O.N.[NH6+3] VXGTWXODBSDXAC-UHFFFAOYSA-M 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910001914 chlorine tetroxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000007034 nitrosation reaction Methods 0.000 description 1
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Chemical compound [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kind of sludge fast culture process for realizing sewage Nitrite accumulation, include the following steps: S1: taking active sludge intermixture appropriate in sewage treatment plant's aerobic nitrification section, measure its sludge concentration (MLSS) value, and it is washed twice after discarding supernatant liquid with clear water, it is diluted and is concentrated according to its MLSS value, so that its sludge concentration is maintained at 3000-4000mg/L, doses appropriate sludge into reactor；S2: addition simulated wastewater is compared its ammonia oxidizing bacteria activity with nitrate bacteria active；S3: suitable treatments method is chosen according to ratio, i.e., whether carries out sludge acclimatization, and add the sulfide of respective concentration, uses certain density free ammonia treatment later；Compared with prior art, the accumulation of this method treated activated sludge can keep in longer period of time higher nitrite nitrogen, treatment effect is preferable, is not likely to produce the activity rebound of nitrate bacteria (NOB), and inhibitory effect is more obvious.
Description
Technical field
The invention belongs to biological sewage processing technology fields, and in particular to a kind of sludge for realizing sewage Nitrite accumulation
Fast culture process.
Background technique
Sewage treatment is one of the major issue during environmental improvement, as people are for energy consumption in sewage disposal process
The concern of problem, energy saving sewage treatmentmethod increasingly receive an acclaim, and such as short-cut nitrification and denitrification technique, the technique is logical
It crosses control nitrifying process and rests on the nitrite stage, on the one hand reduce aeration quantity, it is on the other hand straight by denitrifying bacteria
Connecing nitrate reductase is nitrogen, reduces the supply of carbon source, is a kind of sewage treatment process of energy saving, especially
The combination of short distance nitration and anaerobic ammonia oxidation process, even more one of the forward position focus of sewage treatment field, wherein short distance nitration mistake
Journey effectively carries out the key for being to ensure that anaerobic ammonium oxidation process, but the reaction process of short distance nitration is more difficult to control, it is ensured that sub-
The accumulation of nitrate is the final purpose of short distance nitration.
Generally under conditions of dissolved oxygen abundance, the activity of nitrate bacteria (NOB) is higher than ammonia oxidizing bacteria (AOB), sub-
Nitrate can be immediately converts into nitrate, and the concentration of nitrite is extremely low in water outlet, at present about regulation Nitrite accumulation
Correlative study is concentrated mainly on dissolved oxygen, the pH etc. of sewage in control reaction system, is continuously inhibited to nitrate bacteria, blocks
Nitrite transformation is this approach of nitrate, in addition in recent years it is found that moieties such as free ammonia (FA), free Asia
Nitric acid (FNA), perchloric acid ClO4 -, volatile fatty acid (VFA) etc. will be significantly stronger than pair the inhibiting effect of nitrate bacteria (NOB)
The inhibiting effect of ammonia oxidizing bacteria (AOB), so as to control the accumulation of nitrite nitrogen, such as: China Patent No.:
201010508420.2, publication date: on 04 06th, 2011, discloses a kind of free ammonia of control and accumulate SBR nitrosation-under low temperature
The implementation method of anti-nitrosation, the invention are related to one kind under lower temperature (10 DEG C -18 DEG C), by controlling in reaction system certainly
The activity for inhibiting nitrate bacteria (NOB) by the concentration of ammonia (FA), reaches the accumulation of nitrite；For another example: China Patent No.:
201310347376.5, publication date: on November 20th, 2013 discloses and realize lasting stability nitrite under a kind of cryogenic conditions
The method and device of accumulation reaches nitrite by using two-stage aeration and the mode acclimation sludge of regulation aeration intensity
The effect of accumulation, but more complicated process control is generally required in such research, it is more stringent for treatment conditions requirement,
And device is complex, cost of equipment is higher.Currently, forming effective Asia about a variety of processing method Combined Treatment activated sludge
The less appearance of the report of nitrates accumulation.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of sludge fast culture process for realizing sewage Nitrite accumulation,
Stable, long-term Nitrite accumulation can be generated, effectively carries out providing condition for processes such as Anammoxs.
Technical scheme is as follows:
A kind of sludge fast culture process for realizing sewage Nitrite accumulation, includes the following steps:
S1: taking active sludge intermixture appropriate in sewage treatment plant's aerobic nitrification section, measures its sludge concentration (MLSS) value,
And washed twice after discarding supernatant liquid with clear water, it is diluted and is concentrated according to its MLSS value, keeps its sludge concentration
In 3000-4000mg/L, appropriate sludge is dosed into reactor；
S2: addition simulated wastewater, simulated wastewater water quality are as follows: 25mg/L NH4Cl-N、25mg/L NaNO2- N and 250mg/
L glucose does not add nitrate, controls dissolved oxygen concentration in reactor and reacts 2 hours in 2.0mg/L, fetched water every 20 minutes
Sample detects NH in sewage4 +-N、NO3 --N、NO2 -The content of-N measures sewage sludge biomass concentration (MLVSS) in mixed liquor, and respectively
In ammonia nitrogen in sewage and complete nitrous state conversion to its ammonia oxidizing bacteria active (rAOB) and nitrate bacteria active (rNOB) into
Row calculates, and wherein rAOB and rNOB can be expressed as follows formula, and unit is mg N/ (g MLVSS h), and living to its ammonia oxidizing bacteria
Property active (rNOB) activity of (rAOB) and nitrate bacteria be compared；
S3: suitable processing method is chosen according to ratio, i.e., whether carries out sludge acclimatization, and add the vulcanization of respective concentration
Object uses certain density free ammonia treatment later.
Its principle is ammonia oxidizing bacteria (AOB) to the tolerance of certain density sulfide compared to nitrate bacteria
(NOB) stronger, after removing sulfide removal, ammonia oxidizing bacteria can restore faster, so that dominant population status is occupied, and nitre
Acetic bacterial (NOB) is to the poor resistance of sulfide, and activity is easy to be suppressed, and free ammonia is similar with this for the effect of two class bacteriums
Seemingly, after ammonia oxidizing bacteria (AOB) occupies superiority in aerobic sludge, ammonia nitrogen can not timely turn after being oxidized to nitrite nitrogen
Nitrate nitrogen is turned to, the nitrite containing higher concentration in water outlet is caused, is had when the two Combined Treatment activated sludge preferable
Nitrite accumulation effect.
Further, work as rAOB/rNOB > 0.5, processing mode is as follows:
(1) 100-150mg/L Na is used first2S-S processing, addition manner are as follows: add a certain amount of Na2S is used
The hydrochloric acid or sodium hydroxide of 0.5mol/L adjusts pH to 7.2, is stirred under anaerobic, the first stage uses magnetism
Stirring rod is stirred, mixing speed 1000-1500r/min, mixing time 3-5h, and when stirring guarantees 45-60%
Activated sludge is suspended state, second stage, mixing speed 800-900r/min, mixing time 7-10h, the phase III,
Mixing speed, which is controlled, guarantees that 50-65% activated sludge is suspension in 500-700r/min, mixing time 2-3h, stirring
State, during which controlled at 25-45 DEG C；
(2) 400-450mg/L NH is added into activated sludge system4Cl-N is adjusted using the sodium hydroxide of 0.5mol/L
PH to 8.1, the concentration of free ammonia is 25-32mg/L in system at this time, and reactor controls flooding time at a temperature of 25-30 DEG C
For 15min, water discharging time 12min, hydraulic detention time 25min, control aeration quantity is 0.2-0.4L/min, mixing speed
For 500-800r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, anoxia stirring is carried out, is stirred
Mixing speed is 550-700r/min, stops stirring, hydraulic detention time 45min, air-flotation process 20- after handling 1.2-2h
35min carries out mud-water separation, and supernatant is discharged after standing 0.5h.
Further, as rAOB/rNOB < 0.5, processing mode is as follows:
(1) appropriate activated sludge is put into progress simulated wastewater culture in reactor, control low dissolved oxygen is 1.0mg/
L, temperature are 33-35 DEG C, and adjusting pH value is 5.9-6.2, carry out first time water inlet, and the inflow of waste water is reactor volume
60-75% carries out Air Exposure, hydraulic detention time 7-8h, when the concentration of the dissolved oxygen in reactor rises to 2.0mg/
L, after, stop Air Exposure, intake again, the inlet of waste water is the 50-60% of the water inlet volume of first time wastewater flow rate, is carried out
Precipitate 25-35min, draining, second intakes, using continuum micromeehanics water-out manners, every time according to reactor volume 70% by
Stepping water, hydraulic detention time 6-12h are persistently aerated 4-6h, precipitate 30-40min, carry out period culture domestication 2-3d；
(2) 100-150mg/L Na is used2S-S processing, addition manner are as follows: add a certain amount of Na2S is used
The hydrochloric acid or sodium hydroxide of 0.5mol/L adjusts pH to 7.2 or so, is stirred under anaerobic, the first stage, uses
Magnetic stirring bar is stirred, mixing speed 1000-1500r/min, mixing time 3-5h, second stage, stirring
Speed is 800-900r/min, and mixing time 7-10h, the phase III, mixing speed is controlled in 500-700r/min, stirring
Between be 2-3h, controlled at 25-45 DEG C；
(3) 400-450mg/L NH4Cl-N is added into activated sludge system, is adjusted using the sodium hydroxide of 0.5mol/L
PH to 8.1, the concentration of free ammonia is 25-32mg/L in system at this time, and reactor controls flooding time at a temperature of 25-30 DEG C
For 15min, water discharging time 12min, hydraulic detention time 25min, control aeration quantity is 0.2-0.4L/min, mixing speed
For 500-800r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, anoxia stirring is carried out, is stirred
Mixing speed is 550-700r/min, stops stirring after handling 1.2-2h, hydraulic retention 45min, air-flotation process 20-35min are carried out
Supernatant is discharged after standing 0.5h in mud-water separation.Compared with prior art, the invention has the following beneficial effects:
(1) present invention is handled by carrying out the enrichment of ammonia oxidizing bacteria to the active sludge of low ammonia oxidizing bacteria, Yi Jilian
Sulfide and free ammonia are closed to the inhibiting effect of aerobic microbiological, ammonia oxidizing bacteria and nitrate bacteria in regulation activity sludge
Activity and population variation, generate higher Nitrite accumulation, control without complicated operating parameter, treatment conditions are easier to reach
It arrives, can preferably apply in current engineering application；
(2) compared with prior art, treated that activated sludge can keep higher in longer period of time for this method
The accumulation of nitrite nitrogen, treatment effect is preferable, is not likely to produce the activity rebound of nitrate bacteria (NOB), and inhibitory effect is more obvious.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Specific embodiment
Further to understand the contents of the present invention, below with reference to Fig. 1 and embodiment, the invention will be further described.
Embodiment 1
The present embodiment is that have higher ammonia oxidizing bacteria active after being concentrated or dilute after washing about activated sludge
In the case of, i.e. when rAOB/rNOB > 0.5, to the processing method of its accumulation for carrying out nitrite.
Activated sludge is Nanjing sewage treatment plant aerobic section activated sludge, and measuring its activated sludge concentration is
3500mg/L keeps raw sewage concentration after clear water washs twice, measures its rAOB/rNOB value without being diluted or being concentrated
It is 0.58 > 0.5, without carrying out the enrichment of ammonia oxidizing bacteria, and meanwhile it is dirty only to carry out the activity of the free ammonia treatment of same concentrations
Mud system compares.
Na is added into reactor2S makes its concentration 100mg/L Na2S-S adds a certain amount of Na2S is used
The salt acid for adjusting pH of 0.5mol/L is stirred, the first stage under anaerobic to 7.2 or so, using magnetic stirring bar into
Row stir process, mixing speed 1000r/min, mixing time 3h, when stirring, guarantee that 45% activated sludge is suspended state,
Second stage, mixing speed 800r/min, mixing time 7h, the phase III, mixing speed control is in 500r/min, stirring
Time is 2h, and when stirring guarantees that 50% activated sludge is suspended state, during which controlled at 25 DEG C, backward activated sludge body
400mg/L NH is added in system4Cl-N, and pH to 8.1 is adjusted using the sodium hydroxide of 0.5mol/L, it is equivalent in system and dissociates
The concentration of ammonia is 25mg/L, and reactor carries out at a temperature of 25 DEG C, and control flooding time is 15min, water discharging time 12min,
Hydraulic detention time is 25min, and control aeration quantity is 0.2L/min, mixing speed 500r/min, to NO2 -The content of-N carries out
Observation in real time, works as NO2 -When the content of-N increases, anoxia stirring is carried out, mixing speed 550r/min stops stirring after handling 1.2h
It mixes, hydraulic detention time 45min, air-flotation process 20min carries out mud-water separation, and supernatant is discharged after standing 0.5h.
After reactor normal operation in 1-6 days, through persulfide and free ammonia treated activated Sludge System, control
Its dissolved oxygen is 1mg/L, is discharged the accumulative rate (water outlet nitrite nitrogen/water outlet nitrite nitrogen+nitrate nitrogen) of nitrite gradually
85% is risen to, and reaches stable, and only by the activated sludge of free ammonia treatment, activated Sludge System dissolved oxygen after inoculation
Keep roughly the same with experimental group, the cumulative percentage of nitrite nitrogen is gradually reduced after a few days ago interior rising maintains 62% in water outlet
To 35% or so, reached stable at the 11st day, the results showed that sulfide and free ammonia mixed processing can effectively inhibit nitric acid thin
The activity of bacterium (NOB) makes ammonia oxidizing bacteria (AOB) to become dominant population, and reaches relatively stable Nitrite accumulation effect,
Its time for reaching stable short distance nitration shortens 5 days, and short distance nitration effect is more preferable.
Embodiment 2
The present embodiment be activated sludge have lower ammonia oxidizing bacteria (AOB) it is active under the conditions of, i.e. rAOB/rNOB < 0.5
When, the processing method that processing forms the accumulation of nitrite nitrogen is carried out to it.
Activated sludge is Nanjing sewage treatment plant aerobic nitrification reacting section activity sludge, and measuring its sludge concentration is
Its activated sludge concentration is proportionally diluted to 3000mg/L after being washed with clear water by 5200mg/L, by measuring it
RAOB/rNOB value is 0.41 < 0.5, and appropriate activated sludge is put into progress simulated wastewater culture in reactor, controls low dissolution
Oxygen is 1.0mg/L, and temperature is 35 DEG C, and adjusting pH value is 6.2, is intake for the first time, and the inflow of waste water is reactor volume
60%, carry out Air Exposure, hydraulic detention time 8h, when the concentration of the dissolved oxygen in reactor rises to 2.0mg/L, after,
Stop Air Exposure, intake again, the inlet of waste water is the 55% of first time wastewater flow rate volume, carries out precipitating 35min, is arranged
Water, second of water inlet, using continuum micromeehanics water-out manners, gradually intakes according to the 70% of reactor volume every time, hydraulic retention
Time is 12h, is persistently aerated 6h, precipitates 40min, carries out period culture domestication 3d, Na is added into reactor2S makes its concentration
Reach 150mg/L Na2S-S, and be stirred under anaerobic, first using the salt acid for adjusting pH of 0.5mol/L to 7.2
Stage is stirred using magnetic stirring bar, mixing speed 1500r/min, mixing time 5h, and second stage is stirred
Mixing speed is 900r/min, mixing time 10h, the phase III, mixing speed control in 700r/min, mixing time 3h,
Controlled at 45 DEG C, backward activated sludge system in add 450mg/L NH4Cl-N, and use the hydroxide of 0.5mol/L
Sodium adjusts pH to 8.1, and the concentration for being equivalent to free ammonia in system is 32mg/L (this is higher concentration), and reactor is in 30 DEG C of temperature
Under degree, control flooding time is 15min, water discharging time 12min, hydraulic detention time 25min, and control aeration quantity is
0.4L/min, mixing speed 800r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, into
Row anoxia stirring, mixing speed 700r/min, handle 2h after stop stirring, hydraulic retention 45min, air-flotation process 35min into
Row mud-water separation, stand 0.5h after discharge supernatant ammonium addition concentration be 80mg/L, COD be 420mg/L waste water be used as into
Water carries out normal short distance nitration processing.Simultaneously only to carry out the activated sludge of free ammonia treatment as compareing.
Experimental group is inoculated into corresponding SBR with control group activated sludge respectively, aeration intensity is set, controls its dissolved oxygen
Between 1-2mg/L, temperature be 20 DEG C, hydraulic detention time (HRT) be 6h, control reaction system in pH between 6.5-7.5,
Operation a period of time.
After being inoculated in reactor, using activated sludge system after sulfide and free ammonia mixed processing in 1-7 days,
The accumulative rate (water outlet nitrite nitrogen/water outlet nitrite nitrogen+nitrate nitrogen) for being discharged nitrite nitrogen gradually rises up to 81%, and reaches steady
It is fixed, and control group, i.e., free ammonia is only carried out treated activated sludge system, the cumulative percentage of nitrite nitrogen is in 1- in water outlet
40% is gradually decreased down after gradually rising to 64% in 12d, the experimental results showed that sulfide and free ammonia mixed processing can have
Effect inhibits the activity of nitrate bacteria (NOB), can reach relatively high Nitrite accumulation rate in a relatively short period of time, relatively
In only carrying out free ammonia treated activated sludge, the time for reaching short distance nitration is shortened 5 days, and through persulfide and trip
From ammonia Combined Treatment latter week, reactor being capable of stable operation.
Embodiment 3
The present embodiment be activated sludge have higher ammonia oxidizing bacteria (AOB) it is active under the conditions of, i.e. rAOB/rNOB > 0.5
When, to the treatment process of activated sludge.
Activated sludge is Nanjing sewage treatment plant aerobic nitrification reacting section activity sludge, and measuring its sludge concentration is
Its activated sludge concentration is proportionally concentrated into 4000mg/L after being washed with clear water by 2600mg/L, by measuring it
RAOB/rNOB value is 0.62 > 0.5, and without carrying out the enrichment of ammonia oxidizing bacteria (AOB), Na is added into reactor2S keeps its dense
Degree reaches 125mg/L Na2S-S, and using the salt acid for adjusting pH of 0.5mol/L to 7.2, it is stirred under anaerobic, the
It in one stage, is stirred using magnetic stirring bar, mixing speed 1300r/min, mixing time 4h, when stirring guarantees
50% activated sludge is suspended state, second stage, mixing speed 850r/min, mixing time 8h, phase III, stirring
Speed control is in 600r/min, mixing time 2h, and when stirring guarantees that 55% activated sludge is suspended state, during which controls temperature
Be 30 DEG C, backward activated sludge system in add 425mg/L NH4Cl-N, and pH is adjusted using the sodium hydroxide of 0.5mol/L
To 8.1, the concentration for being equivalent to free ammonia in system is to be changed to 30mg/L, and at a temperature of 28 DEG C, control flooding time is reactor
15min, water discharging time 12min, hydraulic detention time 25min, control aeration quantity are 0.3L/min, and mixing speed is
700r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, anoxia stirring, mixing speed are carried out
For 650r/min, stop stirring after handling 1.8h, hydraulic detention time 45min, air-flotation process 25min carry out mud-water separation, quiet
Supernatant is discharged after setting 0.5h, ammonium addition concentration is 40mg/L, and the waste water that COD is 220mg/L carries out normal as water inlet
Short distance nitration processing, while the activated sludge only to carry out free ammonia treatment is as compareing.
After being operated normally in reactor, using activated sludge system after sulfide and free ammonia mixed processing at 1-7 days
Interior, the accumulative rate (water outlet nitrite nitrogen/water outlet nitrite nitrogen+nitrate nitrogen) for being discharged nitrite nitrogen gradually rises up to 89%, out
Water reaches stable, and control group, i.e., only carries out free ammonia treated activated sludge system, the accumulation of nitrite nitrogen in water outlet
Rate gradually decreases down 52% after gradually rising to 72% in 1-11d, the experimental results showed that at sulfide and free ammonia mixing
Reason can effectively inhibit the activity of nitrate bacteria (NOB), can reach in a relatively short period of time relatively relative to after free ammonia treatment
High Nitrite accumulation rate, the time for reaching stable short distance nitration shorten 4 days.
It is worth noting that those skilled in the art, under present inventive concept and specific embodiment enlightenment, energy
Enough some deformations for directly exporting or associating from the disclosure of invention and common sense, it will be recognized by those of ordinary skill in the art that
Other methods can also be used, or commonly use the mutually different combination etc. between the substitution and feature of well-known technique in the prior art
Unsubstantiality change, can equally be applied, can realize the present invention function and effect that describe, no longer citing expansion one by one
It describes in detail, belongs to the scope of the present invention.
Claims (4)
1. a kind of sludge fast culture process for realizing sewage Nitrite accumulation, which comprises the steps of:
S1: taking active sludge intermixture appropriate in sewage treatment plant's aerobic nitrification section, measures its sludge concentration (MLSS) value, and abandon
It is washed twice after removing supernatant with clear water, it is diluted and is concentrated according to its MLSS value, is maintained at its sludge concentration
3000-4000mg/L doses appropriate sludge into reactor；
S2: addition simulated wastewater, simulated wastewater water quality are as follows: 25mg/L NH4Cl-N、25mg/L NaNO2- N and the Portugal 250mg/L
Grape sugar, does not add nitrate, controls dissolved oxygen concentration in reactor and reacts 2 hours, in 2.0mg/L every 20 minutes water samplings
Detect NH in sewage4 +-N、NO3 --N、NO2 -The content of-N measures sewage sludge biomass concentration (MLVSS) in mixed liquor, and exists respectively
Its ammonia oxidizing bacteria active (rAOB) and nitrate bacteria active (rNOB) are carried out when ammonia nitrogen in sewage and complete nitrous state conversion
It calculates, wherein rAOB and rNOB can be expressed as follows formula, and unit is mg N/ (g MLVSS h), and to its ammonia oxidizing bacteria activity
(rAOB) it is compared with active (rNOB) activity of nitrate bacteria；
S3: choosing suitable treatments method according to ratio, i.e., whether carry out sludge acclimatization, and add the sulfide of respective concentration, it
Certain density free ammonia treatment is used afterwards.
2. a kind of sludge fast culture process for realizing sewage Nitrite accumulation as described in claim 1, which is characterized in that
In processing method described in step S3, as rAOB/rNOB > 0.5, processing mode is as follows:
(1) 100-150mg/L Na is used first2S-S processing, addition manner are as follows: add a certain amount of Na2S is used
The hydrochloric acid or sodium hydroxide of 0.5mol/L adjusts pH to 7.2, is stirred under anaerobic, the first stage uses magnetism
Stirring rod is stirred, mixing speed 1000-1500r/min, mixing time 3-5h, and when stirring guarantees 45-60%
Activated sludge is suspended state, second stage, mixing speed 800-900r/min, mixing time 7-10h, the phase III,
Mixing speed, which is controlled, guarantees that 50-65% activated sludge is suspension in 500-700r/min, mixing time 2-3h, stirring
State, during which controlled at 25-45 DEG C；
(2) 400-450mg/L NH is added into activated sludge system4Cl-N, using 0.5mol/L sodium hydroxide adjust pH to
8.1, the concentration of free ammonia is 25-32mg/L in system at this time, and at a temperature of 25-30 DEG C, control flooding time is reactor
15min, water discharging time 12min, hydraulic detention time 25min, control aeration quantity are 0.2-0.4L/min, and mixing speed is
500-800r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, anoxia stirring, stirring are carried out
Speed is 550-700r/min, stops stirring, hydraulic detention time 45min, air-flotation process 20-35min after handling 1.2-2h
Mud-water separation is carried out, supernatant is discharged after standing 0.5h.
3. a kind of sludge fast culture process for realizing sewage Nitrite accumulation as described in claim 1, which is characterized in that
In processing method described in step S3, as rAOB/rNOB < 0.5, processing mode is as follows:
(1) appropriate activated sludge is put into progress simulated wastewater culture in reactor, control low dissolved oxygen is 1.0mg/L, temperature
Degree is 33-35 DEG C, and adjusting pH value is 5.9-6.2, is intake for the first time, and the inflow of waste water is the 60-75% of reactor volume, into
Row Air Exposure, hydraulic detention time 7-8h, when the concentration of the dissolved oxygen in reactor rises to 2.0mg/L, stopping aeration
Processing, intakes again, and the inlet of waste water is the 50-60% of first time wastewater flow rate volume, carries out precipitating 25-35min, drains,
Second of water inlet, using continuum micromeehanics water-out manners, gradually intakes according to the 70% of reactor volume every time, hydraulic detention time
For 6-12h, it is persistently aerated 4-6h, precipitates 30-40min, carries out period culture domestication 2-3d；
(2) 100-150mg/L Na is used2S-S processing, addition manner are as follows: add a certain amount of Na2S, using 0.5mol/L's
Hydrochloric acid or sodium hydroxide adjust pH to 7.2, are stirred, the first stage, are carried out under anaerobic using magnetic stirring bar
Stir process, mixing speed 1000-1500r/min, mixing time 3-5h, second stage, mixing speed 800-900r/
Min, mixing time 7-10h, the phase III, mixing speed control is in 500-700r/min, mixing time 2-3h, control temperature
Degree is 25-45 DEG C；
(3) 400-450mg/L NH is added into activated sludge system4Cl-N, using 0.5mol/L sodium hydroxide adjust pH to
8.1, the concentration of free ammonia is 25-32mg/L in system at this time, and at a temperature of 25-30 DEG C, control flooding time is reactor
15min, water discharging time 12min, hydraulic detention time 25min, control aeration quantity are 0.2-0.4L/min, and mixing speed is
500-800r/min, to NO2 -The content of-N is observed in real time, works as NO2 -When the content of-N increases, anoxia stirring, stirring are carried out
Speed is 550-700r/min, stops stirring after handling 1.2-2h, hydraulic retention 45min, air-flotation process 20-35min carry out mud
Water separation, is discharged supernatant after standing 0.5h.
4. a kind of sludge fast culture process for realizing sewage Nitrite accumulation as claimed in claim 2, which is characterized in that
PH to 7.2 is adjusted using the sodium hydroxide of 0.5mol/L in the step (1).
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