CN103896394B - Starting method of CANON granule sludge of regeneration urban sewage - Google Patents
Starting method of CANON granule sludge of regeneration urban sewage Download PDFInfo
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- CN103896394B CN103896394B CN201410124240.2A CN201410124240A CN103896394B CN 103896394 B CN103896394 B CN 103896394B CN 201410124240 A CN201410124240 A CN 201410124240A CN 103896394 B CN103896394 B CN 103896394B
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Abstract
The invention relates to a starting method of CANON granule sludge of regeneration urban sewage and belongs to the field of water environmental return and regeneration and the field of sewage treatment plant autotrophic nitrogen removal. The starting method comprises the following steps: firstly inoculating CANON biological filter column to back wash the sludge, diluting the urban sewage by running water, and ensuring stable operation of CANON process under high ammonia nitrogen conditions; then reducing substrate concentration and continuously improving section rising gas velocity, and adjusting the reaction time to ensure a certain ammonia oxygenation rate and total nitrogen removal rate to realize flocculent sludge granulation; finally changing inlet water to the urban sewage to enhance the processing performance. By utilizing the starting method, starting of the CANON granule sludge of the regeneration urban sewage is successfully realized in an intermittent flow manner.
Description
Technical field
The invention belongs to water environmental management and regeneration field, sewage work's autotrophic denitrification field.Be specifically related to the starting method of CANON granule sludge processing normal temperature, low ammonia nitrogen city domestic sewage.
Background technology
Water resources problems is the important factor of restriction social development.China's gross amount of water resources enriches, but Freshwater resources occupancy volume is only 28% of world average level per capita.Due to work, the increasingly sharpening of the unreasonable discharge of rural sewage, cause limited water resource quality and worsen, the phenomenon of water resource waste is day by day serious simultaneously, makes originally just insufficient Freshwater resources become precious all the more.In sewage, nitrate pollution is one of important factor of water pollution, city domestic sewage, trade effluent, and breeding wastewater all exists nitrate pollution problem in percolate.Chinese Ministry of Environmental Protection's " China Environmental State Bulletin in 2012 " shows, and 2012, in national waste discharge, ammonia nitrogen quantity discharged was 253.6 ten thousand tons.Therefore, the Research Significance of nitrogen in sewage advanced treatment process is great.
Present stage is for the city domestic sewage of low ratio of carbon to ammonium, overwhelming majority sewage work adopts and carries out biological denitrificaion based on the traditional technology of nitration denitrification principle, for reaching sewage disposal one-level emission standard A, especially for wherein comparatively strict nitrogen Con trolling index, need additional organic carbon source, inorganic carbon source, consume the huge energy to reflux to meet denitrification requirement in order to nitrification liquid, cost of sewage disposal is remained high; Meanwhile, the carbon source added finally becomes greenhouse gases, causes secondary pollution to environment, and this constrains the development of sewage treatment industry greatly.
The nineties in last century newfound whole process autotrophic denitrification (CANON) technique based on Anammox (ANAMMOX) technology, under aerobic condition, aerobic ammonia oxidation bacterium (AOB) and Anammox (Anammox) bacterium coexist in same reactor, the two synergy, be positioned at filler or the outer field AOB of mud flco, be electron acceptor(EA) with oxygen, by NH
4 +-N is oxidized to NO
2 --N; By effect of mass transmitting, be positioned at the Anammox bacterium of filler or mud flco internal layer, the NO produced with AOB
2 --N is electron donor, by the NH in water
4 +-N directly changes into N
2.Compare with traditional technology, this technique has without the need to additional organic carbon source, saves inorganic carbon source, the low energy efficient of aeration rate, without the need to advantages such as nitrification liquid backflows, and the new approaches of this kind of energy-conservation, low-carbon (LC), environmental protection for sewage water denitrification process provides.
Present stage, distinguish from microbe carrier, CANON technique realizes mainly through the form of biologic filter.Japan Furukawa adopts upward flow Biofix to be the biological filter of filler, and best treatment effect can reach 91%, and total nitrogen elimination capacity can reach 0.83kgm
-3d
-1.To the sponge filler reactor of stream under Chuang etc. use, total nitrogen elimination capacity reaches 1.46kgm
-3d
-1.Although biologic filter has higher total nitrogen elimination capacity and clearance, easily blocks, Liang Yuhai adopts the CANON technique of volcanic filling material, and total nitrogen elimination capacity is up to 3.1kgm
-3d
-1, clearance is 83%, but when occurring blocking fault-layer-phenomenon clearance near 19.6%, even if manually turn over fill out after 60% level when also can only return back to normal, this is the ubiquitous critical defect of biologic filter.
From water quality treatment, current CANON technique is mainly for the treatment of high temperature high-ammonia-nitrogen sewage, and Samik etc. adopt CSTR reactor for treatment total nitrogen concentration 550-600mgL
-1waste water, total nitrogen elimination capacity can reach 0.216kgm
-3d
-1.Process for normal-temperature low-ammonia-nitrogen sewage need further research.
The suspension type biological membrane process that granule sludge is in essence is core with organic or inanimate matter, it is integrated with the advantages such as microbial film capacity of resisting impact load is strong, microenvironment good and activated sludge concentration is high, specific surface area is large, be desirable Anammox bacterium carrying form, the research of Chinese scholars shows that it often has higher processing load relative to common floc sludge.The people such as Xiaoming Li have turned out whole process autotrophic deamination granule sludge in sbr reactor device, and DO is 0.3-0.5mgL
-1, nitrogen removal rate is 63.7%.The using modified type UASB reactor of Zheng's equality has carried out the research of whole process autotrophic denitrification granule sludge, and reactor is 0.2-0.8mgL at DO
-1, temperature 30 ± 1 DEG C, processes ammonia nitrogen concentration 431.7 ± 25.5mgL under inlet flow-patterm 7.8-8.0 condition
-1simulated wastewater, total nitrogen elimination capacity 2.57kgm
-3d
-1.
Can find from the research that investigators have carried out, CANON technique can be applied to multiple reactor types, and macroscopical existence form of microorganism is also varied, is mainly used in high temperature height ammonia nitrogen field, but all inevitably there are some problems.In the above documents, biomembrance process nitrogen elimination capacity is higher, but there is susceptible to plugging problem.There is the lower problem of elimination capacity in conventional activated sludge process.In existing granule sludge research, succession running has achieved certain achievement in research, and periodic running exists the problem that particle formation time is long, nitrogen removal rate is low, it is uneven to mix, total nitrogen elimination capacity is difficult to raising.Therefore cultivate at short notice can the CANON granule sludge of highly efficient regeneration low ammonia nitrogen waste water significant.
Summary of the invention
The object of the present invention is to provide a kind of starting method regenerating the CANON granule sludge of city domestic sewage.
In example of the present invention, specifically describe for reactor basal conditions, but present method is not limited thereto parameter reactor, all intermittent flow activated sludge reactors all can adopting said method.
Regenerate a starting method for the CANON granule sludge of city domestic sewage, comprise the steps:
1) reactor is built, and reactor adopts sbr reactor device, reactor inoculation CANON biologic filter back flushing floc sludge;
2) the I stage, mud adapts to sbr reactor device and CANON process stabilizing runs; Concrete grammar is: fill phase: city domestic sewage mixes in 1:1 ratio with tap water volume, and wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 380-420mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 1500-2000mgL
-1, temperature is 23-25 DEG C, pH is 7.7-8.0.Step of reaction: reactor bottom continuous aeration, dissolved oxygen scope is at 0.2-0.4mgL
-1, control ammonia oxidation rate more than 95%.Precipitate phase: sedimentation time 15min.Bleeding stage: water discharge time 1min, changes water than 50%.When nitrogen removal rate reaches more than 80% in continuous more than 7 days, think that floc sludge has adapted to continuous flow reactor and CANON stable reaction is run;
3) the II stage, CANON granule sludge cultivation stage; Concrete grammar is: fill phase: city domestic sewage tap water is diluted one times, and wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 60-80mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 240-400mgL
-1, temperature is 23-25 DEG C, pH is 7.3-8.0.Step of reaction: reactor bottom continuous aeration, stage initial ammonia oxidation rate is 90%, as ammonia oxidation rate and continuous more than the 7d of nitrogen removal rate respectively more than 90% with 80% improve section rising gas speed immediately to improve dissolved oxygen and hydraulic shear, the fast increase rate of each section rising gas is 0.3-1.6cm.min
-1, Reaction time shorten, makes next cycle ammonia oxidation rate be 85%-95% simultaneously.Precipitate phase: sedimentation time 10min.Bleeding stage: water discharge time 1min, changes water than 50%.When median size is more than 400 μm, and when ammonia oxidation rate and nitrogen removal rate reach 90% and 80% continuous operation more than 7 days respectively, think that CANON granule sludge begins to take shape;
4) the III stage, the domestication CANON granule sludge regeneration city domestic sewage stage; Concrete grammar is: fill phase: control water inlet for city domestic sewage, its water-quality guideline is COD concentration is 240-280mgL
-1, ammonia nitrogen mass concentration is 60-80mgL
-1, nitrite nitrogen concentration is 1-3mgL
-1, basicity mass concentration is with CaCO
3count 400-600mgL
-1, temperature is 23-25 DEG C, pH is 7.3-7.8.Step of reaction: reactor bottom continuous aeration, stage initial ammonia oxidation rate is 90%, when ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80% improve section rising gas speed immediately to improve dissolved oxygen and hydraulic shear, the fast increase rate of each section rising gas is 0.3-1.6cm.min
-1, Reaction time shorten, makes next cycle ammonia oxidation rate be 85%-95% simultaneously.Precipitate phase: sedimentation time 5min.Bleeding stage: water discharge time 1min, changes water than 75%.When median size is more than 1000 μm, and when ammonia oxidation rate and nitrogen removal rate reach 90% and 80% continuous operation more than 7 days respectively, think that the CANON granule sludge of regeneration city domestic sewage starts successfully.
Compared with existing CANON technique, the present invention has following beneficial effect:
1) the invention provides the cultural method that a kind of feasible granule sludge is combined with whole process autotrophic denitrification;
2) the invention provides a kind of starting method of CANON granule sludge of feasible process city domestic sewage;
3) the invention provides under the low matrix condition of normal temperature, the strategy and method that CANON granule sludge runs and safeguards.
The present invention adapts to and steady running---cultivation of CANON granule sludge---CANON granule sludge regeneration city domestic sewage three phases through CANON floc sludge, by the control to reaction times, section rising gas speed, on the basis realizing higher ammonia oxidation rate and nitrogen removal rate, obtain the CANON granule sludge that can regenerate city domestic sewage in the short period of time.Start-up course is simple to operate, easily controls.
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited thereto.
Accompanying drawing illustrates:
Fig. 1 is the SBR testing apparatus schematic diagram that the present invention adopts.
Fig. 2 be adopt the reactor CANON particle of the inventive method formed before and after microphotograph contrast, the microphotograph of be respectively mud in reactor from top to bottom the 1st day, the 10th day, the 50th day and the 80th day.
Fig. 3 adopts the reactor of the inventive method at the changing trend diagram regenerating city domestic sewage stage ammonia oxidation rate and nitrogen removal rate.
Fig. 4 is the changing trend diagram of the reactor particle diameter adopting the inventive method.
Embodiment
Embodiment one
The present invention is the starting method that a kind of normal temperature intermittent flow mode regenerates the CANON granule sludge of city domestic sewage, and its thinking is: CANON floc sludge adapts to and steady running---cultivation of CANON granule sludge---CANON granule sludge regeneration city domestic sewage three phases.
Testing apparatus is sbr reactor device, as shown in Figure 1.Testing apparatus is made up of synthetic glass, internal diameter 90mm, high 1000mm, cubic capacity 6.36L, useful volume 5.5L, and the every 100mm of reactor cylinder is provided with a thief hole, and bottom is provided with microporous aeration device, and pH, DO adopt on-line equipment monitoring.Water inlet, aeration, draining all adopt automatic control.
Reactor adopts the mode of intermittent operation, and one-period comprises into water, reaction, precipitation, draining and idle double teacher.Seed sludge adopts CANON technique biologic filter back flushing floc sludge out, sludge concentration 5.5gL
-1.
First, mud adapts to sbr reactor device and the operation of CANON process stabilizing.Fill phase be that city domestic sewage is mixed in 1:1 ratio with tap water volume with water, wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 380-420mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 1600-1800mgL
-1, temperature is 23-25 DEG C, pH is 7.75-7.9.Start reactor by the method for dilution sanitary sewage, COD wherein can suppress the growth of nitrite nitrogen oxidizing bacteria NOB, prevents AOB from utilizing NH
4 +the NO that-N transforms
2 --N is directly converted into NO
3 -n and can not by Anammox bacterium utilize become N
2.Step of reaction has a laundering period to new water quality and reactor, in order to not suppress the Anammox of anaerobism and suppress aerobic NOB, therefore by dissolved oxygen 0.3mgL due to initial mud
-1lower level.Control ammonia oxidation rate is 95%-100%, if do not have NO in high ammonia oxidation rate situation
2 --N accumulates, then nitrogen removal rate can reach the higher level of more than 80% usually.Due to mud initial settlement poor performance, it is that 15min both can discharge the mud that in reactor, settling property is bad that precipitate phase controls sedimentation time, and most mud can be made again not run off, and ensures the usefulness of system.Bleeding stage adopts gravity drainage, and water discharge time 1min, changes water than 50%.The object of the invention is the CANON granule sludge cultivating efficient denitrification, in the microorganism that the starting stage is conducive to taming wherein with regard to controlling higher nitrogen removal rate, being more than 80% so control nitrogen removal rate and stablizing 7 days.This stage is floc sludge, and median size is at 150-200 μm, and this one-phase lasts 10 days altogether.
Afterwards, CANON granule sludge cultivation stage is entered.Fill phase matrix becomes dilutes one times by city domestic sewage tap water, and wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 60-80mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 250-450mgL
-1, temperature is 23-25 DEG C, pH is 7.5-7.9, and control temperature is 7.3-7.7 at 23-25 DEG C, pH.Step of reaction reactor bottom continuous aeration, move to the 20th day ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80%, next cycle improves section rising gas speed to improve dissolved oxygen and hydraulic shear, and section rising gas speed improves 0.79cm.min
-1, Reaction time shorten, makes this cycle ammonia oxidation rate become 90% simultaneously; When moving to the 27th day, ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate are respectively more than 90% with 80%, and next cycle section rising gas speed improves 0.79cm.min
-1, Reaction time shorten, makes this cycle ammonia oxidation rate become 90% simultaneously; When moving to the 50th day, ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate are respectively more than 90% with 80%, now median size 426 μm, and continuously run more than 7d ammonia oxidation rate and nitrogen removal rate reaches more than 90% and 80% respectively, thinks CANON Granular sludge formation.This stage sludge settling property obviously improves, and controlling sedimentation time is the mud that 10min can eliminate settling property difference further on the basis of the system of guarantee denitrification efficiency.Bleeding stage adopts gravity drainage, and water discharge time 1min, changes water than 50%.This stage lasts 40d altogether.
Finally, on granuloplastic basis on last stage, change influent quality, adopt city domestic sewage, compare with previous stage, influent ammonium concentration does not change, and COD concentration is increased to 240-280mgL
-1, nitrite nitrogen concentration is 1-3mgL
-1, basicity mass concentration is with CaCO
3count 400-600mgL
-1, temperature is 23-25 DEG C, pH is 7.3-7.8.Because water inlet have employed city domestic sewage completely, initially there is longer adaptation time in this stage, be under the prerequisite of 90% at initial ammonia oxidation rate until the 70th day ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate are respectively more than 90% with 80%, improve 0.79cm.min in next cycle section rising gas speed
-1, Reaction time shorten, makes this cycle ammonia oxidation rate become 90% simultaneously; To the 82nd day ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80%, improve 0.79cm.min in next cycle section rising gas speed
-1, Reaction time shorten, makes this cycle ammonia oxidation rate become 90% simultaneously; To the 95th day ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80%, improve 0.79cm.min in next cycle section rising gas speed
-1, Reaction time shorten, makes this cycle ammonia oxidation rate become 90% simultaneously; To the 105th day ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80%, now median size 1013 μm, and operation more than 7d ammonia oxidation rate and nitrogen removal rate reach more than 90% and 80% respectively continuously, think that the CANON granule sludge of regeneration city domestic sewage starts successfully.This stage sludge settling property is good, and controlling sedimentation time is that 5min can make particle precipitate completely.Bleeding stage adopts gravity drainage, and water discharge time 1min, changes water than 75%.This stage lasts 55d altogether.
Claims (1)
1. one kind regenerates the starting method of the CANON granule sludge of city domestic sewage; Step is as follows:
1) reactor is built, and reactor adopts sbr reactor device, reactor inoculation CANON biologic filter back flushing floc sludge;
2) the I stage, mud adapts to sbr reactor device and CANON process stabilizing runs; Concrete grammar is: fill phase: city domestic sewage mixes in 1:1 ratio with tap water volume, and wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 380-420mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 1500-2000mgL
-1, temperature is 23-25 DEG C, pH is 7.7-8.0; Step of reaction: reactor bottom continuous aeration, dissolved oxygen scope is at 0.2-0.4mgL
-1, control ammonia oxidation rate more than 95%; Precipitate phase: sedimentation time 15min; Bleeding stage: water discharge time 1min, changes water than 50%; When nitrogen removal rate reaches more than 80% in continuous more than 7 days, think that floc sludge has adapted to sbr reactor device and CANON stable reaction is run;
3) the II stage, CANON granule sludge cultivation stage; Concrete grammar is: fill phase: city domestic sewage tap water is diluted one times, and wherein COD concentration is 120-140mgL
-1, manually adding ammonium sulfate control influent ammonia nitrogen mass concentration is 60-80mgL
-1, nitrite nitrogen concentration is 2-5mgL
-1, basicity mass concentration is with CaCO
3count 240-400mgL
-1, temperature is 23-25 DEG C, pH is 7.3-8.0; Step of reaction: reactor bottom continuous aeration, stage initial ammonia oxidation rate is 90%, as ammonia oxidation rate and continuous more than the 7d of nitrogen removal rate respectively more than 90% with 80% improve section rising gas speed immediately to improve dissolved oxygen and hydraulic shear, the fast increase rate of each section rising gas is 0.3-1.6cmmin
-1, Reaction time shorten, makes next cycle ammonia oxidation rate be 85%-95% simultaneously; Precipitate phase: sedimentation time 10min; Bleeding stage: water discharge time 1min, changes water than 50%; When median size is more than 400 μm, and when ammonia oxidation rate and nitrogen removal rate reach 90% and 80% continuous operation more than 7 days respectively, think that CANON granule sludge begins to take shape;
4) the III stage, the domestication CANON granule sludge regeneration city domestic sewage stage; Concrete grammar is: fill phase: control water inlet for city domestic sewage, its water-quality guideline is COD concentration is 240-280mgL
-1, ammonia nitrogen mass concentration is 60-80mgL
-1, nitrite nitrogen concentration is 1-3mgL
-1, basicity mass concentration is with CaCO
3count 400-600mgL
-1, temperature is 23-25 DEG C, pH is 7.3-7.8; Step of reaction: reactor bottom continuous aeration, stage initial ammonia oxidation rate is 90%, when ammonia oxidation rate and continuous more than 7 days of nitrogen removal rate respectively more than 90% with 80% improve section rising gas speed immediately to improve dissolved oxygen and hydraulic shear, the fast increase rate of each section rising gas is 0.3-1.6cmmin
-1, Reaction time shorten, makes next cycle ammonia oxidation rate be 85%-95% simultaneously; Precipitate phase: sedimentation time 5min; Bleeding stage: water discharge time 1min, changes water than 75%; When median size is more than 1000 μm, and when ammonia oxidation rate and nitrogen removal rate reach 90% and 80% continuous operation more than 7 days respectively, think that the CANON granule sludge of regeneration city domestic sewage starts successfully.
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| CN105129967B (en) * | 2015-07-07 | 2017-04-19 | 北京工业大学 | Starting method of two-stage filtering process for iron or manganese removal |
| CN107739086B (en) * | 2017-03-31 | 2020-04-28 | 青岛锦龙弘业环保有限公司 | Denitrification method of high-salinity wastewater |
| 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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| CN101439903A (en) * | 2008-12-19 | 2009-05-27 | 北京工业大学 | Method for realizing semi-hitrosation under normal temperature municipal sewage condition |
| CN102701438A (en) * | 2012-05-04 | 2012-10-03 | 北京工业大学 | Normal temperature low-ammonia-nitrogen nitrosation starting method |
| CN103288213A (en) * | 2013-06-08 | 2013-09-11 | 中国环境科学研究院 | Whole-process autotrophic nitrogen removal method and device |
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| EP1518831A1 (en) * | 2003-09-24 | 2005-03-30 | Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO | Aerobic wastewater treatment |
| JP2008173572A (en) * | 2007-01-19 | 2008-07-31 | Nishimatsu Constr Co Ltd | Turbid water treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101439903A (en) * | 2008-12-19 | 2009-05-27 | 北京工业大学 | Method for realizing semi-hitrosation under normal temperature municipal sewage condition |
| CN102701438A (en) * | 2012-05-04 | 2012-10-03 | 北京工业大学 | Normal temperature low-ammonia-nitrogen nitrosation starting method |
| CN103288213A (en) * | 2013-06-08 | 2013-09-11 | 中国环境科学研究院 | Whole-process autotrophic nitrogen removal method and device |
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