CN102417238A - Culture method of short-cut nitrification and denitrification granular sludge - Google Patents
Culture method of short-cut nitrification and denitrification granular sludge Download PDFInfo
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- CN102417238A CN102417238A CN2011103155496A CN201110315549A CN102417238A CN 102417238 A CN102417238 A CN 102417238A CN 2011103155496 A CN2011103155496 A CN 2011103155496A CN 201110315549 A CN201110315549 A CN 201110315549A CN 102417238 A CN102417238 A CN 102417238A
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Abstract
The invention which relates to a culture method of short-cut nitrification and denitrification granular sludge belongs to the technical field of water processing. The culture method is characterized in that: hydroxylamine with the concentration of 5-15mg/L is regularly added to gradually improve COD, ammonia nitrogen, and the phosphorous load in water to culture aerobic granular sludge. The effect of the culture method of the invention is the selective inhibition of hydroxylamine to NOB, so AOB and denitrifying bacteria are enriched. High waterpower shearing force (completed in an aeration mode) is needed to form the granular sludge, so an over-high aeration level allows DO in water to be improved, but low DO is needed by the short-cut nitrification, thereby above problem is solved through the intermit hydroxylamine addition. Hydroxylamine is an intermediate product of a nitration reaction, so the addition of a small amount of hydroxylamine generates no secondary pollution, thereby the culture method of the short-cut nitrification and denitrification granular sludge has a wide market application prospect.
Description
Technical field
The invention belongs to the new bio denitrogenation field of waste water, relate to a kind of azanol that in gas stripping type batch reactor (ASBR), adds and suppress nitrification, cultivate the short-cut nitrification and denitrification granular sludge method.
Background technology
Along with the strictness day by day of emission standard, removing of ammonia nitrogen causes people's attention day by day in the waste water.The traditional biological denitrification process comprises two stages of nitrification and denitrification, and the wherein nitrated stage is divided into ammonia oxidation and two steps of nitrite-oxidizing, i.e. NH
4 +-N → NO
2 --N → NO
3 --N; Denitrification is divided into nitrate reduction and nitrite and reduces two steps, i.e. NO
3 --N → NO
2 --N → N
2And short-cut nitrification and denitrification technology (singlereactorhighactivityammoniaremovalovernitrite; SHARON) be a kind of novel waste aquatic organism denitrification process that proposed in 1997 by Dutch Delft polytechnical university; Realize higher ammonia oxidation bacteria (AOB) growth rate through control high temperature (30～35 ℃), little by little eliminate growth rate NOB (NOB) on the low side through the short sludge age of control again, this technology at first is oxidized to nitrite with ammonia nitrogen; Directly the nitrite denitrification is generated nitrogen then, whole technological reaction formula is: NH
4 +-N → NO
2 --N → N
2Compare with traditional nitrate salt type denitrification, nitrite type denitrification process has the following advantages: reduce by about 25% oxygen requirement, reduced energy consumption; The denitrification stage can reduce the organic carbon source about 40%; Reaction times shortens, and reactor volume can reduce about 30%～40%; The denitrification of nitrous acid nitrogen is higher by about 63% than nitrate nitrogen; Sludge yield reduces, and nitrifying process reduces by 33%～35%, and denitrification process reduces about 55%; Reduced the throwing alkali number; Reduced the quantity discharged of greenhouse gases CO2.
Granule sludge is the group structure that spontaneous gathering forms between mikrobe, also is the microecosystem with homeostasis ability.The aerobic particle mud technology is a kind of novel sewage disposal technology that on the basis of anaerobic grain sludge technology, grows up, and has application promise in clinical practice.Compare with common active sludge, aerobic particle mud has characteristics such as settleability is good, mud density high, anti-shock loading is strong, and can carry out nitration denitrification in this system simultaneously, and can remove pollutents such as carbon, nitrogen, phosphorus and heavy metal simultaneously.According to the distributional difference of DO, aerobic particle mud structurally is divided into aerobic zone, oxygen-starved area and anaerobic zone, different region growings different mikrobes, nitrobacteria mainly is distributed in aerobic zone, denitrifying bacteria mainly is grown in anaerobic zone.Therefore, aerobic particle mud can carry out while nitration denitrification technology.
On the basis of above two kinds of technologies, the begin one's study short-cut nitrification and denitrification reaction of aerobic particle mud of scholars.At present, the regulation and control factor of short distance nitration mainly contain DO, pH, temperature, free ammonia (FreeAmmonia, FA) with free nitrous acid (FreeNitrousacid, FNA), sludge age and suppressor factor etc.Yet common short distance nitration controlling factor is inappropriate for the aerobic particle mud system.Such as: hydraulic shear is to keep and cultivate one of important parameter of aerobic particle mud; The too low particle that causes easily of hydraulic shear disintegrates; But through aeration hydraulic shear is provided usually; The too high meeting of aeration rate improves water body DO level sharp, and too high DO is unfavorable for the carrying out of short-cut nitrification and denitrification reaction.According to the Monod Equation for Calculating, under 25 ℃ of conditions, it is 0.3 and 1.1mg/L that the oxygen saturation constant of AOB and NOB is respectively; Under low DO oxygen condition, the AOB growth velocity is higher than NOB, under high DO condition; The growth velocity of AOB is lower than NOB, is unfavorable for the enrichment of AOB and eliminating of NOB.In addition, FA has obtained the approval of Chinese scholars to the selection inhibition of NOB, but its concrete mechanism is still unclear.Research shows that FA is 0.1～1.0mg/L to the inhibition concentration of NOB, is 10～150mg/L to the inhibition concentration of AOB.The concentration of free ammonia has direct relation with ammonia nitrogen concentration, pH and the temperature in the water body; Therefore be easy to control the concentration of free ammonia in the water body to high ammonia-nitrogen wastewater; And then combine means such as short sludge age, high temperature to eliminate NOB and enrichment AOB, realize the short-cut nitrification and denitrification of system.But at present the selection inhibition range of application of FA is less, mainly is to be used for high ammonia-nitrogen wastewater such as sludge digestion liquid, gourmet powder waste water, percolate etc.
Azanol is as a kind of suppressor factor of nitrifier, and production technique is simple, cheap, is mainly used in the industrial reduction agent.Through adding azanol, can start the short-cut nitrification and denitrification reaction of aerobic nitrifying granular activated sludge system fast.Azanol also is the intermediate product of nitrifying process, adds a small amount of azanol and can not bring secondary pollution to environment.Adding a small amount of azanol cultivation short distance nitration granule sludge advantage applies through intermittence exists: temperature, pH, the control of DO level require to reduce, and are easy to technological operation; Do not need heating, reduced energy consumption; Add azanol and can start the short distance nitration reaction fast, saved technology start time; Present method expands the range of application of short-cut nitrification and denitrification to lower concentration, low C/N ratio wastewater processing.
Summary of the invention
The technical problem that the present invention will solve provides a kind of azanol that utilizes as the nitrifier suppressor factor, cultivates the method for short-cut nitrification and denitrification granular sludge
Technical scheme of the present invention is in ASBR, to cultivate granule sludge, and after the question response device was stable, adding a concentration in 2～4 days at interval was 5～15mg/L azanol; Handling COD concentration is 400～650mg/L, NH
4 +-N is 50～150mg/L waste water, keeps C/N (carbon nitrogen element ratio) greater than 4; The aeration rate-controlling is at 0.02～0.1m
3/ h level maintains more than the 5mg/L DO.
Benefit of the present invention is to utilize the selection inhibition of azanol to NOB, thus enrichment AOB and denitrifying bacterium.Need higher hydraulic shear (mode through aeration is accomplished) owing to form granule sludge, too high aeration level can improve the DO in the water body, and short distance nitration needs lower DO, adds azanol through intermittence and has just solved this contradiction.And azanol is the intermediate product of nitration reaction, adds a spot of azanol and do not produce secondary pollution.
Description of drawings
Accompanying drawing is the SBR structural representation.
Among the figure: 1 inlet chest; 2 intake pumps; 3 micro porous aeration heads; Pipe in the 4SBR; The 5SBR outer tube; 6 SVs; 7 air compressor pumps.
Embodiment
Specific embodiment below in conjunction with technical scheme and accompanying drawing detailed description apparatus of the present invention.
Embodiment:
The ASBR reactor drum is constituted by inner and outer pipe, useful volume 2.5L, outer tube diameter 7.0cm, high 80cm, diameter of inner pipe 4.4cm, high 70cm.
The micro porous aeration head that air is installed through reactor bottom central authorities by air pump gets into reactor drum; Liquid and granule sludge move upward in interior pipe in the air-flow driving a reaction device that forms; Between inside and outside tube wall, move downward then; Behind reactor bottom, moved upward by the air-flow traction once more, mixed solution can circulate between inside and outside tube wall and uniform mixing like this.Intake at reactor bottom through volume pump, water port is at the high 40cm of reactor bottom place, and the volume-exchange rate is 50%.The water inlet of reactor drum, aeration, sedimentation and water discharge time are by dual-time rly. and the control automatically of liquid level control meter.Be 4h cycling time, the 2min of wherein intaking, and water outlet 1min, the granule sludge formation settling time in stage, according to the particles settling performance, the phase that is decremented to weekly had only 2min sedimentation settling time from 50min, and all the other times are aeration phase entirely.The aeration rate of reactor drum is 0.02～0.10m
3/ h, being equivalent to the surface gas upflow velocity is 0.5～1.8cm/s.Reactor drum is in room temperature (24～30 ℃) operation down.
The cultivation initial stage: preparation simulated wastewater COD concentration 400mg/L, NH
4 +-N concentration 50mg/L, water inlet pH value is by NaHCO
3Regulate, be controlled in 7.5～8.5 scopes.
Cultivate mid-term: reactor drum began to occur particle diameter smaller particles mud in the 14th day; The reactor drum granular sludge is accomplished in the time of the 60th day, and grain pattern rule, fine and close has omnidistance preferably synchronous nitration and denitrification function.
Cultivate the ripening stage: in ASBR, add azanol, when concentration is 10mg/L, added once in per 2～4 days.Add after the azanol, begin to accumulate nitrite in the ASBR, its concentration is and increases progressively trend, and meanwhile, the concentration of nitrate salt constantly reduces.Finally, the primary product of ammonia oxidation is a nitrite.Add azanol concentration during simultaneous test is observed when being lower than 5mg/L, granule sludge can recover the complete nitrification denitrification rapidly, and the TN clearance is merely 34% simultaneously, and in addition, when C/N was lower than 4, the TN clearance maintained about 40%.Short-cut nitrification and denitrification granular sludge has simultaneously removes COD and the function of carrying out nitration denitrification, at simulated wastewater water inlet COD and NH
4 +When-N concentration is respectively 400mg/L and 100mg/L, COD, NH
4 +-N and TN average removal rate are respectively 79%, 99.8% and 57%.
When granule sludge that utilize to cultivate the ripening stage is handled real life waste water, when COD concentration is 350mg/, NH
4 +When-N concentration is 70mg/L, COD, NH
4 +-N, TN average removal rate are respectively 78%, 98%, 55%.
Claims (1)
1. the cultural method of a short-cut nitrification and denitrification granular sludge is characterized in that: after ASBR cultivated granule sludge, treats the granule sludge maturation, adding a concentration in 2～4 days at interval was 5～15mg/L azanol; Cultivation initial stage simulated wastewater index is COD=400～650mg/L, NH
4 +-N=50～150mg/L keeps C/N greater than 4, and the aeration rate-controlling is at 0.02～0.1m
3/ h maintains more than the 5mg/L DO.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112945A (en) * | 2013-02-25 | 2013-05-22 | 北京工业大学 | SBR (Sequencing batch reactor) nitrosation quick start method |
| CN103145233A (en) * | 2013-03-09 | 2013-06-12 | 北京工业大学 | Method for achieving fast cultivation of shortcut nitrifying granule sludge |
| CN105621611A (en) * | 2014-10-28 | 2016-06-01 | 中国石油化工股份有限公司 | Method for quickly starting short-cut nitrification and denitrification of ammonia-containing wastewater |
| CN105621610A (en) * | 2014-10-28 | 2016-06-01 | 中国石油化工股份有限公司 | Salt-containing sewage simultaneous nitrification and denitrification denitrogenation method |
| CN106554922A (en) * | 2015-09-30 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of method for preserving of nitrite bacteria |
| CN106745793A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of deep treatment method of saline sewage |
| CN106754450A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of denitrifying microorganism culture promoter and its preparation method and application |
| CN107311306A (en) * | 2016-04-26 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of method that short-cut nitrification and denitrification handles the sewage containing ammonia |
| CN108128897A (en) * | 2018-01-05 | 2018-06-08 | 北京工业大学 | The apparatus and method of synchronous short-cut nitrification and denitrification dephosphorization Treating Municipal Sewage are realized based on azanol |
| CN110921820A (en) * | 2019-12-25 | 2020-03-27 | 北京工业大学 | Method for quickly starting normal-temperature short-cut nitrification of municipal sewage by using benzethonium chloride |
| CN111410295A (en) * | 2020-03-31 | 2020-07-14 | 西安建筑科技大学 | Rapid starting and stable operation method for shortcut nitrification of biochemical reaction tank |
| CN111470616A (en) * | 2020-03-31 | 2020-07-31 | 深圳市万创青绿环境工程有限公司 | Culture method for granulating aerobic granular sludge and reactor thereof |
| CN112573647A (en) * | 2020-12-29 | 2021-03-30 | 江西省科学院微生物研究所 | Method for culturing aerobic granular sludge for synchronous short-cut nitrification and denitrification of degraded pyridine |
| CN113620505A (en) * | 2021-07-07 | 2021-11-09 | 北京工业大学 | Device and method for realizing starting and maintaining of short-cut nitrification by alternately and laterally treating hydroxylamine and free nitrite |
| CN115466008A (en) * | 2022-08-26 | 2022-12-13 | 华中科技大学 | Combined treatment method and process for coking phenol-cyanogen sewage |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112945A (en) * | 2013-02-25 | 2013-05-22 | 北京工业大学 | SBR (Sequencing batch reactor) nitrosation quick start method |
| CN103145233A (en) * | 2013-03-09 | 2013-06-12 | 北京工业大学 | Method for achieving fast cultivation of shortcut nitrifying granule sludge |
| CN103145233B (en) * | 2013-03-09 | 2014-01-01 | 北京工业大学 | Method for achieving fast cultivation of shortcut nitrifying granule sludge |
| CN105621611A (en) * | 2014-10-28 | 2016-06-01 | 中国石油化工股份有限公司 | Method for quickly starting short-cut nitrification and denitrification of ammonia-containing wastewater |
| CN105621610A (en) * | 2014-10-28 | 2016-06-01 | 中国石油化工股份有限公司 | Salt-containing sewage simultaneous nitrification and denitrification denitrogenation method |
| CN106554922B (en) * | 2015-09-30 | 2019-07-12 | 中国石油化工股份有限公司 | A kind of method for preserving of nitrite bacteria |
| CN106554922A (en) * | 2015-09-30 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of method for preserving of nitrite bacteria |
| CN106754450A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of denitrifying microorganism culture promoter and its preparation method and application |
| CN106745793A (en) * | 2015-11-19 | 2017-05-31 | 中国石油化工股份有限公司 | A kind of deep treatment method of saline sewage |
| CN106745793B (en) * | 2015-11-19 | 2020-10-16 | 中国石油化工股份有限公司 | Advanced treatment method of salt-containing sewage |
| CN107311306B (en) * | 2016-04-26 | 2020-10-16 | 中国石油化工股份有限公司 | Method for treating ammonia-containing sewage by short-cut nitrification and denitrification |
| CN107311306A (en) * | 2016-04-26 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of method that short-cut nitrification and denitrification handles the sewage containing ammonia |
| CN108128897A (en) * | 2018-01-05 | 2018-06-08 | 北京工业大学 | The apparatus and method of synchronous short-cut nitrification and denitrification dephosphorization Treating Municipal Sewage are realized based on azanol |
| CN108128897B (en) * | 2018-01-05 | 2021-09-10 | 北京工业大学 | Device and method for realizing synchronous shortcut nitrification and denitrification dephosphorization treatment of municipal sewage based on hydroxylamine |
| CN110921820A (en) * | 2019-12-25 | 2020-03-27 | 北京工业大学 | Method for quickly starting normal-temperature short-cut nitrification of municipal sewage by using benzethonium chloride |
| CN111470616A (en) * | 2020-03-31 | 2020-07-31 | 深圳市万创青绿环境工程有限公司 | Culture method for granulating aerobic granular sludge and reactor thereof |
| CN111410295A (en) * | 2020-03-31 | 2020-07-14 | 西安建筑科技大学 | Rapid starting and stable operation method for shortcut nitrification of biochemical reaction tank |
| CN112573647A (en) * | 2020-12-29 | 2021-03-30 | 江西省科学院微生物研究所 | Method for culturing aerobic granular sludge for synchronous short-cut nitrification and denitrification of degraded pyridine |
| CN112573647B (en) * | 2020-12-29 | 2021-07-20 | 江西省科学院微生物研究所 | Method for culturing aerobic granular sludge for synchronous short-cut nitrification and denitrification of degraded pyridine |
| CN113620505A (en) * | 2021-07-07 | 2021-11-09 | 北京工业大学 | Device and method for realizing starting and maintaining of short-cut nitrification by alternately and laterally treating hydroxylamine and free nitrite |
| CN115466008A (en) * | 2022-08-26 | 2022-12-13 | 华中科技大学 | Combined treatment method and process for coking phenol-cyanogen sewage |
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Application publication date: 20120418 |