CN100548902C - A kind of aerobic particle mud method and aerobic particle mud thereof of handling town sewage - Google Patents
A kind of aerobic particle mud method and aerobic particle mud thereof of handling town sewage Download PDFInfo
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- CN100548902C CN100548902C CNB2008100195517A CN200810019551A CN100548902C CN 100548902 C CN100548902 C CN 100548902C CN B2008100195517 A CNB2008100195517 A CN B2008100195517A CN 200810019551 A CN200810019551 A CN 200810019551A CN 100548902 C CN100548902 C CN 100548902C
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Abstract
The present invention handles the aerobic particle mud method and the aerobic particle mud of town sewage, and feature is that reactor adopts 8-15 aspect ratio and 50%-80% draining ratio, and air is charged into by the reactor bottom compression, behind the inoculation flco mud, draining improved 5%-10% in every month, to 60%-80% than since 50%; The time cycle of operation, every month shortened 1 hour, to 2-3 hour from 4-6 hour; Settling time, the settling time was reduced 1-2min weekly, to 15-20min from 30-40min; Stable operation to aerobic granule sludge accounts for the 50-85% of reactor reaction zone volume.Gained aerobic particle mud particle diameter is bigger, and settling velocity is fast, and structure is closely knit, and is strong to the changes in environmental conditions resistivity.The invention solves prior art and be prone to sludge bulking, mud come-up, the aeration tank structure is huge, and floor space is big, investment, operation cost height, defectives such as system's fluctuation of service.
Description
Technical field:
The invention belongs to the biological wastewater treatment technology field, particularly a kind of aerobic particle mud method and aerobic particle mud thereof of handling town sewage.
Background technology:
U.S.'s " biological wastewater treatment " (Biological Wastewater Treatment,, the 2nd edition, 246-313 page or leaf in 1999) mentions, activated sludge process by the Ardennes (Arden) of Britain and Luo Kete (Lockett) in Manchester (
Massachuseets) sewage work's exploitation, be the treatment technology of present most widely used processing town sewage.This activated sludge process is to utilize the Metabolic activity of active sludge to handle waste water under aerobic state; Active sludge is made up of a large amount of breeding formed microbial populations in back of aerobic microbiological process and some inorganicss, the organism that is not decomposed and the metabolic secretory product of microorganism self, air or oxygen enters in the mixed solution with pressure attitude or normal atmosphere attitude, liquid in the reactor is carried out mechanical stirring or air-flow stirring, mixed solution is divided into sedimentary biosolids and waste water two portions after treatment in second pond, the sludge part of second pond refluxes, and excess sludge is discharged system; Because mud settling of floccus speed is little in the existing sludge settling system, loosely organized and the easy come-up of mud, the sludge yield height, thereby cause that its sludge settling system bulk is big, floor space is wide, surplus sludge volume is many, sewage work needs bigger capital construction area, more sludge disposal expense and structures construction cost, thereby construction of existing sewage work and operation cost height; Existing activated sludge process is because mud is loosely organized, cell and extracellular polymeric mix in the flco, particle diameter only is 0.05-0.2mm, density only is 1.002-1.007g/mL, content of microorganisms low and to the resistivity of changes in environmental conditions a little less than, mud settling of floccus speed only is 18-31m/h, settling velocity is less, therefore, existing activated sludge process system bulk load is low, and sludge settling property is relatively poor.Sludge bulking takes place because floor space is big in existing town sewage treatment system easily, thereby investment, operation cost are higher, and system's operation is unstable.
China's " biological wastewater treatment new technology-theory and application " (China Environmental Science Press, 1999) mention, it is the sewage biological treatment system that adopts the intermittent aeration mode to move that existing sequencing batch reactor (SBR) and preface are criticized airlift reactor (SBAR) technology, its collection water inlet, anaerobism, aerobic, be deposited in a pond, conversion operation scheme neatly is to adapt to the processing requirements of dissimilar waste water, sewage intermittently enters treatment system, intermittently discharges; Reactor is a tubular, and aeration head is installed in reactor bottom, adopts blast main to be connected in order to oxygen supply with the extraneous air compressor, and guide shell can be established in inside; Adopt water inlet-aeration-precipitation-draining as handling the operation process cycle, every section all with the operation of time controller control automated cycle; But the aspect ratio that existing SBR and SBAR reactor adopt is less than 1, and the draining ratio is 50%, and is all lower, is unfavorable for the granulating of active sludge.
Summary of the invention:
The purpose of this invention is to provide a kind of aerobic particle mud method and aerobic particle mud thereof of handling town sewage, thereby reduce the sludge settling system requirements, reduce the Sewage treatment systems floor space, reduce surplus sludge volume, reduce sewage work's construction and operation cost.
The aerobic particle mud method of processing town sewage of the present invention adopts tubular reactor and water inlet-aeration-precipitation-draining to handle the operation process cycle; It is characterized in that: described reactor adopts the aspect ratio of 8-15 and the draining ratio of 50%-80%, air is quantitatively charged into by reactor bottom by air compressor, and behind the reactor inoculation flco mud, the draining ratio of reactor is since 50%, improved 5%-10%, and finally rose to 60%-80% in every month; The time cycle of operation, every month shortened 1 hour, till 2-3 hour from 4-6 hour; Settling time, the settling time was reduced 1-2min weekly, finally reaches 15-20min from 30-40min; Stable operation accounts for the 50-85% of reactor reaction zone volume to the volume of aerobic granule sludge.
The aerobic particle mud that the above-mentioned aerobic particle mud method of employing of the present invention cultivates out, be faint yellow sphere or ellipsoidal particle, there is the space inside, it is characterized in that: diameter is 0.3-0.8mm, density is 1.010-1.016g/mL, and settling velocity is 18-31m/h; Microorganism wherein comprises bacillus based on coccus; Extracellular polymeric 75-90% concentrates on particulate inside in the particle, and cellular component 70-90% is distributed in the particle skin.
Because the present invention adopts larger ratio of height to diameter and draining ratio, air circulates at inside reactor, progressively improve the draining ratio, shorten the time cycle of operation gradually, the operating method that settling time reduces gradually, overcome existing sequencing batch reactor (SBR) and preface and criticized airlift reactor (SBAR) technology owing to low aspect ratio and draining ratio and the long problem that can not turn out aerobic particle mud that causes of the time cycle of operation, make under the condition of lower concentration town sewage, still can criticize and successfully turn out the closely knit aerobic particle mud of structure in the airlift reactor (SBAR) in sequencing batch reactor (SBR) and preface;
Because the aerobic particle mud outward appearance that the present invention cultivated is sphere or the elliposoidal of diameter 0.3-0.8mm, and being particle diameter, active sludge only is the dispersed texture of 0.05-0.2mm, the granule sludge settling velocity is 18-31m/h, settling property is much better than traditional active sludge, and dispersion system with respect to active sludge, microorganism is closely linked in the reunion mode in the granule sludge, thereby the sludge bulking that is prone to that has solved existing town sewage treatment process, the mud come-up, the aeration tank structure is huge, floor space is big, investment, operation cost is higher, and system's operation is than defectives such as instabilities.
Description of drawings:
The sequencing batch reactor synoptic diagram of Fig. 1 for using among the aerobic particle mud method embodiment 1 of the present invention;
Fig. 2 criticizes the airlift reactor synoptic diagram for the preface of using among the embodiment 2.
Embodiment:
By the following examples content of the present invention is illustrated in further detail.
Embodiment 1:
Aspect ratio of processing town sewage aerobic particle mud method employing is 12 sequencing batch reactor (SBR) in the present embodiment, and so-called sequence batch (is exactly the sewage biological treatment system that adopts intermittent mode to move; As shown in Figure 1: reactor body partly is the combination of cylindric synthetic glass tube and carbon steel, the high 5.5m of cylinder, and lower part carbon steel height is 3m, and the height of upper part synthetic glass body is 2.5m, and barrel bore is 0.5m, and effective volume is 1m
3Micro porous aeration head 4 is equipped with in the bottom of reactor, adopt blast main 10 to be connected with extraneous air compressor 2, aeration rate is regulated by spinner-type flowmeter 3, and reactor is by magnetic valve 5 drainings, by intake pump 1 water inlet, the operation automatically under program timer 6 controls of a whole set of technology.
The operating process that present embodiment adopts above-mentioned sequencing batch reactor processing town sewage to cultivate aerobic particle mud is as follows: under program timer 6 controls, reactor moves automatically by the mode of water inlet-aeration-precipitation-draining; An initial launch condition of reactor is: cycle length is 4 hours, flooding time is 5 minutes, aeration time is 195 minutes, sedimentation time is 30 minutes, water discharge time is 10 minutes, and micro porous aeration head 4 is equipped with in the bottom of reactor, and aeration rate is adjusted to 0.5cm/s (superficial gas flow velocity) by spinner-type flowmeter 3, reactor is by magnetic valve 5 drainings, and the draining ratio is 50%.The ordinary activated sludge flco is put in the above-mentioned reactor, made that the sludge concentration in the reactor is 6g/L; Town sewage pumps into above-mentioned sequencing batch reactor off and on by intake pump 1; In a manner described after one week of steady running, by gradient weekly the settling time reduce 1-2min gradually, the flco mud that settling property is relatively poor progressively washes out reactor; After reactor moved the 30th day, shortening the time cycle of operation was 3 hours, was about to aeration time and shortened one hour, moved 2 cycles every day more, to improve influent load; After reactor moved the 60th day, sludge settling property significantly improved in the reactor, continue this moment by gradient weekly the settling time reduce 1-2min gradually, and simultaneously the draining ratio is brought up to 60%, further screen settling property mud preferably; After reactor moves the 100th day, occur parts of fine small-particle mud particle in the reactor, at this moment, will the settling time reduce to 15min, further improve draining and compare 70%; Further stable operation 1-2 month, the volume of aerobic particle mud accounted for the 50-80% of reactor reaction zone volume in the reactor.
The aerobic particle mud of cultivating out through aforesaid way is that a kind of diameter is faint yellow sphere or the ellipsoidal particle of 0.5mm, and there is the space inside, and density is 1.013g/mL, and settling velocity is 25m/h; Microorganism wherein comprises bacillus based on coccus, and is closely linked in the reunion mode; Contain a large amount of extracellular polymeric (EPS) in the particle, EPS80% concentrates on particulate inside, and cellular component then 85% is distributed in the particle skin.
After aerobic particle mud was cultivated and finished, sludge concentration was stabilized in 8-9g/L in the reactor, the reactor for treatment effect stability, and effluent quality is good; Wherein the shared per-cent of volatile constituent is stabilized in about 80%, and the amount of the amount of the inner living microorganism of aerobic particle mud much larger than the inner microorganism of ordinary activated sludge is described; Reactor obviously rises to the clearance of pollutent, and chemical requirement (COD) clearance rose to after the granulating greater than 90% from 70% of when inoculation, NH
4 +The clearance of-N also rises to more than 90% from 60%; after granular sludge is described; because the raising of its sedimentation and compression performance; can remain with very high biomass in the reactor; these highly active aerobic particle muds contain abundant microbial population; comprise heterotrophic organism and autotrophic bacteria etc., this makes reactor have higher treatment efficiency.Aspect ratio in this example is made as 12, but all can realize granular sludge in aspect ratio is the 8-15 scope.
Embodiment 2:
Handling town sewage aerobic particle mud method in the present embodiment, to adopt an aspect ratio be that 12 preface is criticized airlift reactor (SBAR), and it is exactly to adopt intermittent mode to move and the inner sewage biological treatment system that has a guide shell that so-called preface is criticized air lift type; As shown in Figure 2: reactor body partly is the combination of cylindric synthetic glass tube and carbon steel, lower part carbon steel height is 3m, the height of upper part synthetic glass body is 2.5m, the high 5.5m of cylinder, internal diameter is 0.5m, and there are the guide shell of a polyvinyl chloride (PVC) material, high 4.5m in inside, internal diameter 0.3m, effective volume is 1m
3The vertical zone of guide shell inside is a upspout 7, and the vertical zone that forms between guide shell and the urceolus is a sedimentation pipe 8; Micro porous aeration head 4 is equipped with in the bottom of reactor, adopt blast main 10 to be connected with extraneous air compressor 2, aeration rate is regulated by spinner-type flowmeter 3, and reactor is by magnetic valve 5 drainings, by intake pump 1 water inlet, the operation automatically under program timer 6 controls of a whole set of technology.
Present embodiment adopts above-mentioned preface to criticize airlift reactor and handles town sewage to cultivate the operating process of aerobic particle mud as follows: waste water pumps into reactor by intake pump 1, the micro porous aeration head 4 of air through being installed in reactor bottom that is pressed into by air compressor machine 2 enters reactor, mud is driven by air-flow and moves upward in the upspout 7 of guide shell 9 inside, go into sedimentation pipe 8 in upspout 7 pipe jackings, downward then subsiding movement, enter upspout once more to reactor bottom, circulate in inside reactor formation, aeration rate is adjusted to 0.3cm/s (superficial gas flow velocity) by spinner-type flowmeter 3, water outlet is discharged reactor by magnetic valve 5, and the draining ratio is 50%; Under program timer 6 controls, reactor moves automatically by the mode of water inlet-aeration-precipitation-draining; The initial launch condition of reactor is: a cycle of operation length is 3 hours, and flooding time is 5 minutes, and aeration time is 125 minutes, and sedimentation time is 40 minutes, and water discharge time is 10 minutes.The ordinary activated sludge flco is put in the above-mentioned reactor, made that the sludge concentration in the reactor is 8g/L; Town sewage pumps into above-mentioned preface off and on by intake pump 1 and criticizes airlift reactor; After one week of steady running, reduce 1-2min gradually by every 1-2 settling time in week of gradient in a manner described, the flco mud that settling property is relatively poor progressively washes out reactor; After reactor moves the 80th day, sludge settling property significantly improves in the reactor, this moment, the settling property according to mud in the reactor continued to reduce 1-2min gradually by every 1-2 settling time in week of gradient, and simultaneously the draining ratio was brought up to 60%, further screened settling property mud preferably; After reactor moves the 150th day, parts of fine small-particle mud particle appears, at this moment in the reactor, to the settling time reduce to 20min, further stable operation 2-4 month, the amount of aerobic particle mud rose gradually in the reactor, and the ratio that particle accounts for total suspended solid (SS) reaches 40-60%.
The aerobic particle mud diameter of turning out is faint yellow sphere or the ellipsoidal particle of 0.4mm, and there is the space inside, and density is 1.019g/mL, and settling velocity is 22m/h; Microorganism wherein comprises bacillus based on coccus, and is closely linked in the reunion mode; Contain a large amount of extracellular polymeric (EPS) in the particle, EPS75% concentrates on particulate inside, and cellular component then 80% is distributed in the particle skin.
After aerobic particle mud was cultivated and finished, sludge concentration was stabilized in 6-7g/L in the gas lift reactor, the reactor for treatment effect stability, and effluent quality is good; The per-cent of the shared total suspended solid of volatile constituent is stabilized in about 70%; Reactor is obvious to the clearance effect of pollutent, and the COD clearance is greater than 90%, NH
4 +The clearance of-N is stabilized in more than 95%.Aspect ratio in this example is made as 12, but all can realize granular sludge in aspect ratio is the 8-15 scope.
Claims (2)
1, a kind of aerobic particle mud method of handling town sewage adopts tubular reactor and water inlet-aeration-precipitation-draining to handle the operation process cycle; It is characterized in that: described reactor adopts the aspect ratio of 8-15 and the draining ratio of 50%-80%, air is quantitatively charged into by reactor bottom by air compressor, and behind the reactor inoculation flco mud, the draining ratio of reactor is since 50%, improved 5%-10%, and finally rose to 60%-80% in every month; The time cycle of operation, every month shortened 1 hour, till 2-3 hour from 4-6 hour; Settling time, the settling time was reduced 1-2min weekly, finally reaches 15-20min from 30-40min; Stable operation accounts for the 50-85% of reactor reaction zone volume to the volume of aerobic granule sludge.
2, a kind of aerobic particle mud that adopts the described aerobic particle mud method of claim 1 to cultivate out, be faint yellow sphere or ellipsoidal particle, there is the space inside, it is characterized in that: diameter is 0.3-0.8mm, density is 1.010-1.016g/mL, and settling velocity is 18-31m/h; Microorganism wherein comprises bacillus based on coccus; Extracellular polymeric 75-90% concentrates on particulate inside in the particle, and cellular component 70-90% is distributed in the particle skin.
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941760B (en) * | 2009-07-06 | 2012-05-02 | 北京大学 | Device for culturing aerobic granular sludge and dedicated reactor thereof |
| CN101962222B (en) * | 2010-11-15 | 2011-10-19 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | Method for fast aerobic granulation of flocculent sludge in sequence batch reactor |
| CN102139953B (en) * | 2011-04-28 | 2012-07-25 | 中国科学技术大学苏州研究院 | Quick cultivating system and quick cultivating method for aerobic granular sludge |
| CN108793391A (en) * | 2018-05-31 | 2018-11-13 | 济南大学 | A kind of device and method of Fe-C electrodes collaboration aerobic particle mud processing antibiotic medicine waste water |
| CN109019847A (en) * | 2018-08-24 | 2018-12-18 | 东北大学 | A kind of low-voltage electrocoagulation promotes the device and method of aerobic particle mud culture |
| CN110054296B (en) * | 2019-05-17 | 2020-11-03 | 北京化工大学 | A/O/A SBR process for treating low C/N ratio municipal sewage |
| CN111348748A (en) * | 2020-04-13 | 2020-06-30 | 浙江双林环境股份有限公司 | Aerobic granular sludge sewage treatment process and equipment of two-stage sequencing batch reactor |
| CN112875851B (en) * | 2021-02-03 | 2023-06-23 | 沈阳大学 | Method for promoting aerobic sludge granulation to treat organic wastewater by using carbon nanotubes |
| CN113184985B (en) * | 2021-05-19 | 2022-07-12 | 西南交通大学 | Method for promoting stable operation of aerobic granular sludge |
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| US5126050A (en) * | 1990-05-10 | 1992-06-30 | Sbr Technologies, Inc. | Granular activated carbon-sequencing batch biofilm reactor (GAC-SBBR) |
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| CN101054232A (en) * | 2007-05-31 | 2007-10-17 | 北京师范大学 | Highly efficient treatment process for waster water with high content of salt |
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