CN103787499B - A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge - Google Patents
A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge Download PDFInfo
- Publication number
- CN103787499B CN103787499B CN201310536201.9A CN201310536201A CN103787499B CN 103787499 B CN103787499 B CN 103787499B CN 201310536201 A CN201310536201 A CN 201310536201A CN 103787499 B CN103787499 B CN 103787499B
- Authority
- CN
- China
- Prior art keywords
- dissolved oxygen
- stage
- reactor
- water
- granule sludge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge belongs to the process of high ammonia nitrogen stain disease and regeneration field.In sequencing batch reactor, the basis of the CANON granule sludge that application has started is studied the impact that dissolved oxygen runs reactor, the steps include: with CANON granule sludge as kind of a mud, aeration provides reaction necessary dissolved oxygen, under the condition controlling certain dissolved oxygen gradient, research makes the method for reactor Effec-tive Function.The invention solves unascertainable dissolved oxygen for a long time and, on the impact of CANON granule sludge Operating ettectiveness, demonstrate the less impact on reaction of extended aeration in short-term, the through engineering approaches for CANON process high ammonia-nitrogen wastewater is applied and is proposed new approaches.
Description
Technical field
The invention belongs to the process of high ammonia nitrogen stain disease and regeneration field.Be specifically related to solve the Effec-tive Function method of whole process autotrophic denitrification (CANON) process particulates mud under high ammonia-nitrogen condition.
Background technology
The life developing into the mankind of science and technology provides many convenience, but also makes human society and Facing Natural Environment acid test.For China, explicitly point out: 2011 in China Environmental State Bulletin in 2012, national surface water is totally slight pollution.Lake (reservoir) eutrophication problem is still given prominence to.Wherein tributary of Yangtze, the Yellow River, Pearl River system ammonia and nitrogen pollution are still main pollution.The ammonia and nitrogen pollution overwhelming majority in these water systems is that anthropogenic discharge causes, the especially high ammonia-nitrogen wastewater of industrial discharge.At present, for the removal of ammonia nitrogen in water, especially high ammonia-nitrogen wastewater process you, main adopt physico-chemical process and biological process.Relative to biological process, physico-chemical process exists that cost is high, complicated operation and easily cause the shortcomings such as secondary pollution.So Biochemical method high ammonia-nitrogen wastewater is current prevailing technology.
In many Biochemical method high ammonia-nitrogen wastewater technique, CANON (completely autotrophicnitrogen removal over nitrite) technique becomes the focus of research at present in the denitrogenation mode of its uniqueness.CANON technique is reacted by nitrosation reaction and Anammox and is combined, ammonium oxidation in water becomes nitrite nitrogen and anaerobic ammonia oxidizing bacteria (Anammox) then to utilize the nitrite nitrogen of oxidation for electron donor by the nitrococcus (AOB) carrying out nitrosation reaction, and ammonia nitrogen is that electron acceptor(EA) carries out the reaction a small amount of nitrate nitrogen of generation and N
2, thus reach the object removing ammonia nitrogen.
CANON technological reaction is as follows:
NH
3+0.85O
2→0.11NO
3 -+0.44N
2+0.14H
++1.43H
2O
CANON has plurality of advantages in ammonia nitrogen removal.First without the need to additional organic carbon source, save a large amount of aerations and inorganic carbon source, can infusion of financial resources be reduced; Product is a small amount of mud and N
2, can not secondary pollution be caused.Nitrogen removal rate can reach more than 80% in theory, is the ideal chose of energy-efficient denitrification process.But the denitrification ability of CANON technique, the especially granule sludge of CANON technique is comparatively obvious by the impact of dissolved oxygen (DO), small dissolved oxygen change will cause the noticeable change of denitrification effect.
Therefore, be subject to the problem of dissolved oxygen impact for CANON process particulates mud, how address this problem and this technique efficient stable is run, significant for the application of CANON process engineeringization.
Summary of the invention
The object of the present invention is to provide a kind of method making sequence batch (CANON granule sludge Effec-tive Function.For reaching above-mentioned technique effect, technical scheme of the present invention is achieved in that
The present invention is the method adopting sequencing batch operation CANON granule sludge, and CANON granule sludge obtains in the cultivation in early stage, provides upflow velocity and hydraulic shear, reactor is mixed with aeration.Concrete operations are as follows:
An Effec-tive Function method for sequence batch (whole process autotrophic denitrification granule sludge, adopt cycle training method, sbr reactor device, is characterized in that: comprise the steps:
1) inoculation kind of mud: the kind mud in reactor is CANON granule sludge, mud particle diameter 200-450nm, and sludge concentration is 1.5-3g/L;
2) reactor operation method is: each cycle comprises into water, reaction, precipitation, draining, idle double teacher.In the I stage: water inlet, adopt manual simulation's water distribution, controlling influent ammonia nitrogen mass concentration is 300-450mg/L, and phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is with CaCO
3count 1400-2000mg/L; The II stage: reaction, adopt heating in water bath, control temperature is 27-33 DEG C, inlet flow-patterm is 7.7-8.3, in initial water, dissolved oxygen concentration is 0.1mg/L, when ammonia nitrogen removal frank stablizes 3-4 days at 40%-95%, improve dissolved oxygen concentration 0.05-0.15mg/L at next cycle, final dissolved oxygen concentration is 0.5mg/L; Hydraulic detention time HRT is 12h; In the III stage: precipitation, sedimentation time is 4-6min; In the IV stage: draining, change water than 50%; The V stage: idle, idle mixing time 2-10h, idle Posterior circle carries out next cycle.
3) Effec-tive Function: nitrogen removal rate is greater than 75% and the dissolved oxygen concentration that reactor runs can be set as by the dissolved oxygen concentration corresponding to continuous and steady operation more than 5 days; Be specially: the I stage: water inlet, adopt manual simulation's water distribution, controlling influent ammonia nitrogen mass concentration is 300-450mg/L, and phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is with CaCO
3count 1400-2000mg/L; In the II stage: reaction, adopt heating in water bath, control temperature is 27-33 DEG C, and inlet flow-patterm is 7.7-8.3, nitrogen removal rate is greater than 75% and can be set as the dissolved oxygen concentration that reactor runs by the dissolved oxygen concentration corresponding to continuous and steady operation more than 5 days; Hydraulic detention time HRT is 12h; In the III stage: precipitation, sedimentation time is 4-6min; In the IV stage: draining, change water than 50%; The V stage: idle, idle mixing time 2-10h, idle Posterior circle carries out next cycle.
Principle is described as follows:
1) the kind mud of inoculation in test: by cultivating the CANON granule sludge obtaining median size and be greater than 300nm early stage, this granule sludge has similar round shape, sorrel, sludge concentration 1.5-3g/L.
2) little dissolved oxygen value is first determined in test, first DO value is maintained at 0.05-0.1mg/L, when DO value can be improved constantly after steady running 3-4 days, ammonia nitrogen and nitrogen removal rate are improved, DO concentration is brought up to ammonia nitrogen removal frank and nitrogen removal rate the process of 0.4 from 0.1 and is all improved constantly, and reactor is stable.When DO brings up to 0.5mg/L, there is a large amount of sub-nitrogen accumulation in reactor immediately, the trend do not improved by several days operating performances, but afterwards DO is being reduced to 0.4mg/L, and treatment effect can significantly be recovered.
3) impact of extended aeration: due to the difference of influent concentration and DO value, will inevitably cause there will be extended aeration phenomenon when HRT is 14h.Make extended aeration 1-2h by manual control influent concentration, next cycle is when recovering original operational conditions, and ammonia nitrogen and total nitrogen treatment effect can recover very soon
The present invention has following beneficial effect:
1) test on the basis of cultivating successful CANON granule sludge, substantially reduce the cycle of operation;
2) establish comparatively detailed dissolved oxygen master mode, find the dissolved oxygen span of control be comparatively applicable under this test conditions;
3) demonstrate the impact of extended aeration on CANON granule sludge less, control the extended aeration time of dissolved oxygen with dissolved oxygen meter, simple to operation.
Accompanying drawing illustrates:
Fig. 1 is the CANON testing apparatus schematic diagram that the present invention adopts.
1. intake pump; 2. pneumatic pump; 3. volcanic filling material; 4. thief hole; 5. material taking mouth
Fig. 2 be adopt the inventive method reactor over time, the relation between ammonia nitrogen removal frank, nitrogen removal rate and DO change.
Fig. 3 be adopt the reactor ammonia oxidation speed rate of the inventive method, variation relation that Anammox speed of reaction changes with DO.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited thereto.
The present invention is conceived to the Effec-tive Function method solving high-ammonia-nitrogen sewage CANON process particulates mud, its thinking is: in sbr reactor device, be kind of a mud with the CANON granule sludge of having turned out, adopt the mode that the resting period is run, operation phase continuous aeration also controls the method for certain dissolved oxygen concentration gradient, research dissolved oxygen is on the impact of whole process autotrophic denitrification process, the size major effect nitrite bacteria of dissolved oxygen and the activity of anaerobic ammonium oxidizing bacteria, the effect of aeration is not only confined to provide certain density dissolved oxygen, simultaneously by the control upflow velocity of aeration, thus corresponding hydraulic shear is provided, ensure the normal operation of reactor.
Reactor kind mud of the present invention is the CANON granule sludge of having turned out.Owing to being CANON granule sludge, the condition for subsequent operations has had and has adapted in advance, is conducive to shortening the test period, also makes test more easily success.Because two kinds of bacterium of working in CANON technique are nitrite bacteria (AOB) and anaerobic ammonium oxidizing bacteria (Anammox), although Anammox is anerobe, but particle has certain dissolved oxygen depth, certain dissolved oxygen concentration can be allowed to exist and Anammox can not be suppressed active.
Oxygen penetration depth is by following formulae discovery:
δ
pf=((2D.C
si)/(q
s max.C
xf))
1/2, wherein: D: diffusion coefficient (m
2/ s), Csi: microbial film and solution interface oxygen concn (mol/m
3), q
s max: maximum oxygen intake speed (L/S), Cxf: the biomass (mol/m on microbial film
3).
The present invention adopts operation phase continuous aeration, controls the method for certain dissolved oxygen concentration gradient.During beginning, aeration is enough little, controls dissolved oxygen at 0.05-0.1mg/L, makes reactor have an adaptive process.After this improve DO value gradually, improve the clearance of reactor.Run from reactor, water inlet adopts manual simulation's water distribution, and controlling influent ammonia nitrogen mass concentration is 300-450mg/L, and phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is with CaCO
3count 1400-2000mg/L, add the necessary trace element of microorganism growth simultaneously; Step of reaction control temperature is 27-33 DEG C, and inlet flow-patterm is 7.7-8.3, and in initial water, dissolved oxygen concentration is 0.1mg/L, and when ammonia nitrogen removal frank stablizes 3-4 days, improve dissolved oxygen concentration 0.05-0.15mg/L at next cycle, final dissolved oxygen concentration is 0.5mg/L; Hydraulic detention time (HRT) is 12h; In the III stage: precipitation, sedimentation time is 4-6min; In the IV stage: draining, change water than 50%; The V stage: idle, idle mixing time 2-10h, idle Posterior circle carries out next cycle.
Each standard is different for defining of reactor efficiency, and the clearance of the average total nitrogen of optimal state of the present invention is more than 75%, and maximum material removal rate, close to 80%, reaches the removal effect of expection.The present invention obtains the dissolved oxygen conditions of system high efficiency steady running by the mode of this feedback regulation.
Specific embodiment one:
The Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge, water inlet is in tap water, add a certain amount of (NH
4)
2sO
4, NaHCO
3and KH
2pO
4configuration forms, and adds appropriate trace element simultaneously, and concrete water quality is as follows:
Ammonia nitrogen mass concentration 380-420mg/L, phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is (with CaCO
3meter) be 1400-2000mg/L.The dosage of trace element mixed solution is 1mg/L, comprises (mg/L):
Nutritive medium I:EDTA5.00 FeSO
4.7H2O5.00 nutritive medium II:EDTA15.00H
3bO
40.014 MnCl
2.4H
2o0.099 CuSO
4.5H
2o0.25 ZnSO
4.7H
2o0.43NiCl
2.6H
2o0.19 Na
2seO
4.10H
2o0.21 Na
2moO
4.2H
2o0.22NaWO
4.2H
2o
Reactor types: reactor adopts synthetic glass to process, cylindrical, internal diameter 7mm, total height 1000mm, cumulative volume 3.8L, useful volume 3.4L.Microporous aeration device is equipped with in bottom, controls aeration rate size by gas rotameter.
Operation scheme comprises into water, reaction, precipitation, draining, idle double teacher.Water inlet is intake from bottom by peristaltic pump; Step of reaction controls water temperature 30 ± 1 DEG C, aeration controls 0.1 respectively, 0.2,0.3,0.4,0.5mg/L five concentration gradients, pH8.0 ± 0.1, HRT is 11h; Sedimentation time 5min; Water discharge time 1.5min, changes water than 50%; Leave unused to the next cycle.Reactor maximum total nitrogen elimination capacity and the average nitrogen removal rate of maximum stable can reach 0.45kg/ (m respectively
3d) He 78%.
The test initial stage determines that dissolved oxygen concentration is 0.1mg/L, through 12 periodic duties, nitrogen removal rate is all the time in about 30% fluctuation, total nitrogen removal effect is poor, because ammonia nitrogen removal frank is equally very low, and without nitrite nitrogen accumulation (being less than 7mg/L), so can analyze is because DO is lower, HRT comparatively short-range missile causes, under the condition not changing HRT, and can only by improving the method for DO.Under this analytical procedure instructs, improve constantly DO until when DO is 0.4mg/L, nitrogen removal rate becomes positive correlation trend with DO value, is up to about 78% and stablizes.The the 47th, 48 two day extended aeration two hours, within the 49th day, return to former operational condition and can recover very soon and steady running, the extended aeration of short-term can not produce considerable influence to system.When DO value brings up to 0.5mg/L, nitrite nitrogen sharply increases, and is up to 190mg/L, and nitrogen removal rate is reduced to only has 42%, has exceeded the tolerance limit of reactor when DO to 0.5mg/L can be described.
In the present invention, the speed of reaction of AOB and the Anammox bacterium usefulness that is coupled when DO is 0.4mg/L reaches maximum, stablizes that average nitrogen removal rate is maximum reaches 85%, and maximum total nitrogen volumetric loading reaches 0.5kg/ (m
3d).
Specific embodiment two:
The water inlet of embodiment two is substantially identical with embodiment one, and the key distinction is in the form of reactor.
Reactor types: reactor adopts synthetic glass to process, cylindrical, internal diameter 15mm, total height 500mm, cumulative volume 8.83L, useful volume 7L.Because cross-sectional reactor area is comparatively large, there is the uneven situation of aeration in common aeration ring, so bottom uses emery disc aerating apparatus instead, controls aeration rate size by gas rotameter.Kind mud and embodiment one are from same reactor.
Operation scheme comprises into water, reaction, precipitation, draining, idle double teacher.Water inlet is intake from top by peristaltic pump; Step of reaction controls water temperature 30 ± 1 DEG C, aeration controls 0.1 respectively, 0.2,0.3,0.4,0.5mg/L five concentration gradients, pH8.0 ± 0.1, HRT is 11h; Sedimentation time 5min; Change water than 50%; Leave unused to the next cycle.Reactor maximum total nitrogen elimination capacity and the average nitrogen removal rate of maximum stable can reach 0.4kg/ (m respectively
3d) He 75%.
The test initial stage is larger change because reactor types there occurs, and first through a dissolved oxygen laundering period, determine that dissolved oxygen concentration is 0.05mg/L, through 5 periodic duties, DO brings up to 0.1mg/L, and now nitrogen removal rate only has about 25%.10 cycles are run continuously under DO is 0.1mg/L condition, nitrogen removal rate can reach 35%, now ammonia oxidation speed rate and Anammox speed of reaction are all than large during beginning, nitrite nitrogen content is not had to be less than 7mg/L in system, so under the condition not changing HRT, improve reactor efficiency by the method improving DO.Under this analytical procedure instructs, improve constantly DO until when DO is 0.4mg/L, nitrogen removal rate becomes positive correlation trend with DO value, is up to about 75% and stablizes.When DO value brings up to 0.5mg/L, nitrite nitrogen sharply increases, and is up to 153mg/L, and nitrogen removal rate is reduced to only has 45%, has exceeded the tolerance limit of reactor when DO to 0.5mg/L can be described.
In present system, the speed of reaction of AOB and the Anammox bacterium usefulness that is coupled when DO is 0.4mg/L reaches maximum, stablizes that average nitrogen removal rate is maximum reaches 84%, and maximum total nitrogen volumetric loading reaches 0.44kg/ (m
3d).
Claims (1)
1. an Effec-tive Function method for sequence batch (whole process autotrophic denitrification granule sludge, adopt cycle training method, sbr reactor device, is characterized in that, comprises the steps:
1) inoculation kind of mud: the kind mud in reactor is CANON granule sludge, mud particle diameter 200-450nm, and sludge concentration is 1.5-3g/L;
2) reactor operation method is: each cycle comprises into water, reaction, precipitation, draining, idle double teacher; In the I stage: water inlet, adopt manual simulation's water distribution, controlling influent ammonia nitrogen mass concentration is 300-450mg/L, and phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is with CaCO
3count 1400-2000mg/L; The II stage: reaction, adopt heating in water bath, control temperature is 27-33 DEG C, inlet flow-patterm is 7.7-8.3, in initial water, dissolved oxygen concentration is 0.1mg/L, when ammonia nitrogen removal frank stablizes 3-4 days at 40%-95%, improve dissolved oxygen concentration 0.05-0.15mg/L at next cycle, final dissolved oxygen concentration is 0.5mg/L; Hydraulic detention time HRT is 12h; In the III stage: precipitation, sedimentation time is 4-6min; In the IV stage: draining, change water than 50%; The V stage: idle, idle mixing time 2-10h, idle Posterior circle carries out next cycle;
3) Effec-tive Function: nitrogen removal rate is greater than 75% and the dissolved oxygen concentration that reactor runs can be set as by the dissolved oxygen concentration corresponding to continuous and steady operation more than 5 days; Be specially: the I stage: water inlet, adopt manual simulation's water distribution, controlling influent ammonia nitrogen mass concentration is 300-450mg/L, and phosphoric acid salt mass concentration is 5-10mg/L, and basicity mass concentration is with CaCO
3count 1400-2000mg/L; In the II stage: reaction, adopt heating in water bath, control temperature is 27-33 DEG C, and inlet flow-patterm is 7.7-8.3, nitrogen removal rate is greater than 75% and can be set as the dissolved oxygen concentration that reactor runs by the dissolved oxygen concentration corresponding to continuous and steady operation more than 5 days; Hydraulic detention time HRT is 12h; In the III stage: precipitation, sedimentation time is 4-6min; In the IV stage: draining, change water than 50%; The V stage: idle, idle mixing time 2-10h, idle Posterior circle carries out next cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310536201.9A CN103787499B (en) | 2013-11-03 | 2013-11-03 | A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310536201.9A CN103787499B (en) | 2013-11-03 | 2013-11-03 | A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103787499A CN103787499A (en) | 2014-05-14 |
| CN103787499B true CN103787499B (en) | 2015-09-02 |
Family
ID=50663624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310536201.9A Active CN103787499B (en) | 2013-11-03 | 2013-11-03 | A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103787499B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384237B (en) * | 2015-11-26 | 2017-11-07 | 北京城市排水集团有限责任公司 | A kind of autotrophic denitrification integrated apparatus for handling high ammonia-nitrogen wastewater and startup method |
| CN107188307A (en) * | 2017-07-01 | 2017-09-22 | 清华大学 | A kind of Integral waste water nitrogen rejection facility and a kind of method of denitrogenation of waste water |
| CN109292976B (en) * | 2018-11-09 | 2021-08-24 | 重庆大学 | Method for regulating performance of single-stage autotrophic nitrogen removal granular sludge reactor based on microbial activity |
| CN111410300B (en) * | 2019-01-07 | 2021-06-22 | 清华大学 | Method for removing nitrate in underground water by using hydrogen autotrophic denitrification granular sludge |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59193197A (en) * | 1983-04-15 | 1984-11-01 | Susumu Hashimoto | Activated sludge method for denitrification and dephosphorization |
| KR100913726B1 (en) * | 2008-12-19 | 2009-08-24 | 조정선 | Method of controlling dissolved oxygen level in waste water treatment system |
| CN103172170A (en) * | 2013-03-08 | 2013-06-26 | 北京工业大学 | Sequencing batch completely autotrophic ammonia removal technology running method |
-
2013
- 2013-11-03 CN CN201310536201.9A patent/CN103787499B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103787499A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103172174B (en) | Starting and running method of completely autotrophic ammonium removal over nitrite technology | |
| CN103482765B (en) | Quick starting method for technology for simultaneous denitrification and COD removal under condition of normal-temperature and low-C/N sewage | |
| CN103601341B (en) | SBR (Sequencing Batch Reactor) and SBBR (Sequencing Biofilm Batch Reactor) municipal sewage high-efficiency biological treatment method and device based on anaerobic ammonia oxidation | |
| CN103723821B (en) | Method for rapid mutagenesis of autotrophic nitrosation sludge from complete nitrifying sludge | |
| CN106630414B (en) | Semi-short-cut nitrification-anaerobic ammoxidation multistage A/O autotrophic denitrification device and method | |
| CN103224284B (en) | Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology | |
| CN103787498B (en) | Rapid starting method of low-temperature low C/N sewage improvement A2/O process | |
| CN104058551B (en) | A kind of municipal effluent autotrophic denitrification bioremediation of efficient energy-saving and device | |
| CN104986923A (en) | Multi-stage A/O biological nitrogen removal device and method based on shortcut nitrification-anaerobic ammonia oxidation of municipal sewage | |
| CN103922466B (en) | A kind of nitrosated granular sludge cultural method of normal temperature process city domestic sewage | |
| CN103539263B (en) | Quick start method for cultivating granular sludge employing completely autotrophic nitrogen removal process | |
| CN103011407B (en) | Device and method for developing carbon source in primary sludge to strengthen denitrification of municipal sewage | |
| CN103787499B (en) | A kind of Effec-tive Function method of sequence batch (whole process autotrophic denitrification granule sludge | |
| CN102219297A (en) | Rapid culture method of aerobic granular sludge | |
| CN103224285B (en) | Rapid starting method of membrane bioreactor shortcut nitration technology | |
| CN103539257B (en) | Membrane bioreactor domestic sewage treatment nitrosation quick start method | |
| CN105198168A (en) | A2/O-MBR-biological contact oxidation pond dual-sludge high-efficiency denitrifying phosphorus removal device and method | |
| CN104628131A (en) | Production device and method for achieving stable denitrification of nitrite in continuous flow | |
| CN103172170A (en) | Sequencing batch completely autotrophic ammonia removal technology running method | |
| CN103112947A (en) | Method suitable for nitrosation stable operation of low-temperature and low-ammonia nitrogen SBR (sequencing batch reactor) | |
| CN203593686U (en) | Anammox-based SBR+SBBR urban highly-effective wastewater biological treatment device | |
| CN103193320B (en) | Efficient autotrophic denitrification method of bacterial filter | |
| CN103086502A (en) | Rapid styrene butadiene rubber (SBR) nitrosoation recovery method | |
| CN106904732A (en) | A kind of method that membrane bioreactor quickly starts short distance nitration | |
| CN110776101A (en) | Device for treating urban sewage by utilizing partial nitrosation-anaerobic ammonia oxidation process and method used by device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |