CN104803478A - Energy-saving and consumption-reduction stable operation device and method for enhancing aerobic granule sludge - Google Patents
Energy-saving and consumption-reduction stable operation device and method for enhancing aerobic granule sludge Download PDFInfo
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- CN104803478A CN104803478A CN201510215845.7A CN201510215845A CN104803478A CN 104803478 A CN104803478 A CN 104803478A CN 201510215845 A CN201510215845 A CN 201510215845A CN 104803478 A CN104803478 A CN 104803478A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses an energy-saving and consumption-reduction stable operation device and a method for enhancing aerobic granule sludge. The device comprises a water inlet unit, a reactor main body, an aeration unit, a water outlet unit and a time control unit, wherein the time control unit is a programmable automatic time controller, and comprises a time control switch and a liquid level meter probe; the time control switch controls a cyclic process of reactor operation; and water inflow is controlled by the liquid level meter probe via electrical signal conduction. An operation cycle is divided into water inlet, standing, aeration, settling and water outlet stages; sludge is inoculated; MLSS (mixed liquor suspended solid) is inoculated as 4-6g/L; an inlet water matrix is town sewage; COD (chemical oxygen demand) concentration of inlet water is 300-800mg/L; a height-diameter ratio of 4-8 and a drainage ratio of 30-70% are adopted; the operation cycle is 4-6h; the settling time is 5-15min; and the aeration time is 3-5h. According to the device and the method, the aerobic granule sludge which is large in granule size, high in settling velocity, stable in structure and rich in flora can be formed, and the problems of high aeration energy consumption, easy sludge bulking in an operation process, unstable long-time operation of a system and the like in the prior art are solved.
Description
Technical field
The present invention relates to a kind of the aerobic particle mud operation process and the device that process town sewage, belong to technical field of biological treatment of wastewater.
Background technology
Mishima in 1991 etc. find aerobic activated sludge self coagulation phenomenon in Continuous Flow AUSB reactor.Aerobic particle mud is the microorganism self-retaining form of spontaneous formation under aerobic condition, it has excellent settling property, higher biological retention volume, lower sludge yield and anti-Organic loading shock performance, greatly compensate for the deficiency of traditional activated sludge process.Morgenroth in 1997 etc. are at sequencing batch reactor (Sequence Batch Reactor, SBR) in, shorter hydraulic detention time and sedimentation water discharge time is utilized to discharge the floc sludge of settling property difference, and to keep in reactor dissolved oxygen concentration at more than 2mg/L, cultivate through 40d and successfully turn out acquisition aerobic particle mud (AGS) stable in a large number, open aerobic particle mud sbr reactor device research chapter.After this, study hotspot mainly concentrates on the formation mechenism of AGS, culture condition and major influence factors.Research report, shorter hydraulic detention time and larger hydraulic shear are conducive to the process of aerobic granular.In Aerobic Granular Sludge Technology application aspect, the universities such as Dutch Delft, Australian Queensland, successively implement wastewater treatment pilot plant test and the engineering mimoir such as aerobic particle mud process food, edible oil, beer, livestock and poultry cultivation and municipal administration.At present, the aerobic particle mud technique of relative maturity is Dutch Nereda technique, its reforming technology built on Dutch Epe municipal sewage plant and other places, and pollutant removal efficient stable, land area and energy consumption save 75%.
But, the aeration intensity of current aerobic particle mud technique is commonly 2cm/s-5cm/s, high aeration intensity not only brings high energy consumption problem, granule sludge easily suppresses denitrification, affects grain pattern stability under the lasting high aeration shearing condition of aeration starvation phase simultaneously, constrains its industrialized application.Therefore, while reduction aeration energy consumption, maintain aerobic particle mud structural stability and contaminant removal efficiency, there is very important practical application meaning.
Summary of the invention
The object of this invention is to provide a kind of energy-saving and cost-reducing aerobic particle mud strengthening steady operation device and method, while realizing the reduction of system cloud gray model energy consumption, ensure that aerobic granular sludge reactor long-term stability is run.
A kind of energy-saving and cost-reducing aerobic particle mud strengthening steady operation device, comprise inlet unit, reactor body, aeration unit, water unit and time control unit, described time control unit is automatization time controller able to programme, comprise time switch and liquid level meter probes, time switch controls the periodic process that reactor runs, and flooding quantity is controlled by electrical signal conduction by liquid level meter probes.
Described inlet unit, comprise the submersible pump and bucket of intaking that are connected with reactor body, water-in is positioned at reactor body top.
Described reactor body is cylindrical, and multiple top-down spoil disposal thief hole is arranged at side to bottom.
Described aeration unit, comprise pneumatic pump, spinner-type flowmeter, porous aeration head, porous aeration head is positioned at the bottom of reactor body, and aeration rate is regulated by the spinner-type flowmeter be connected in the middle of porous aeration head and pneumatic pump.
Described water unit, comprise peristaltic pump and go out bucket, water outlet adopts the spoil disposal thief hole be positioned in the middle part of reactor body.
According to an aerobic particle mud enhancement method for described device, the cycle of operation is divided into into water-standing-aeration-precipitation-water outlet double teacher; Seed sludge, inoculation MLSS is 4-6g/L; Water inlet matrix is town sewage, and inlet COD concentration is 300-800 mg/L; Adopt the aspect ratio of 4-8 and the draining ratio of 30%-70%; The cycle of operation is 4-6 hour; Settling time is 5-15 minute; Aeration time is 3-5 hour.
Described aeration phase, initial start stage aeration intensity controls at 2.5 cms
-1, the aeration intensity 0.25-0.5 cms of aeration starvation phase after device is basicly stable, was reduced every 10 days
-1, the aeration intensity of final body system aeration starvation phase is down to 1.0 cms
-1.
Described seed sludge takes from municipal sewage plant aeration tank, and shannon index is 4.79, and the horizontal Bacterial community analysis of door finds, Proteobacteria and Bacteroidetes have accounted for more than 65%, and energy aid-device realizes the quick particle of aerobic particle mud.
Described aerobic particle mud is faint yellow spheroidal particle, average diameter of particles is 0.2mm, particle diameter is in distribution normal state, grain pattern consolidation, surface have gully to ensure dissolved oxygen (DO) and nutritive substance mass transfer, in particle, microorganism is reunited closely, containing zoogloea, and be enriched with solar month of 30 days Pseudomonas, make pottery Salmonella in distress and Nitraspira functional flora.
beneficial effect of the present invention:
due to the operation scheme reducing aeration at aeration starvation phase gradually that the present invention adopts, overcome the problem directly reducing the easy unstability of sequencing batch reactor (SBR) in aeration situation, the contaminant removal efficiency (NH that reactor is higher can be given
4 +-N, COD and TN clearance maintain 90%, 95%, more than 80% respectively) and steady running for a long time.
The process control mode of aeration is reduced owing to have employed gradient, conventional SBR method of comparing decreases the energy expenditure of about 30%-70% in operational process, overcome the problem that ordinary activated sludge aeration tank energy consumption is high, running cost is high, in actual sewage process, there is very important realistic meaning.
The aerobic particle mud that the present invention cultivates is faint yellow spheroidal particle, and median size is 0.2mm, and particle diameter is in distribution normal state, and grain pattern consolidation, surface have gully to ensure dissolved oxygen (DO) and nutritive substance mass transfer; Compare ordinary activated sludge, microorganism in granule sludge is reunited closely, the zoogloea containing higher proportion, and be enriched with solar month of 30 days Pseudomonas, the functional floras such as Salmonella in distress and Nitraspira of making pottery.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram used in case study on implementation 1 of the present invention.Wherein: pneumatic pump 1, spinner-type flowmeter 2, automatization time controller able to programme (PAC) 3, submersible pump 4, water inlet bucket 5, peristaltic pump 6, go out bucket 7, spoil disposal thief hole 8;
Fig. 2 is the operation scheme of the reactor gradient reduction aeration in case study on implementation 1;
In Fig. 3 position case study on implementation 1, gradient reduces the variation diagram of sludge concentration (MLSS) and sludge volume index (SV) index after aeration;
Fig. 4 is the variation diagram of total nitrogen (TN) removal capacity after gradient reduction aeration in case study on implementation 1;
Fig. 5 is the granule sludge SEM comparison diagram of case study on implementation 1.Granule sludge SEM photo before left part is divided into gradient in case study on implementation 1 to fall exposing to the sun, the granule sludge SEM photo after right part is divided into gradient to fall exposing to the sun.
Embodiment
The present invention is described further below by way of embodiments and drawings.
As shown in Figure 1, a kind of energy-saving and cost-reducing aerobic particle mud strengthening steady operation device, comprises inlet unit, reactor body, aeration unit, water unit and time control unit.Described reactor body is cylindrical, and multiple top-down spoil disposal thief hole 8 is arranged at side to bottom.Described time control unit is automatization time controller 3 able to programme, comprises time switch and liquid level meter probes, and time switch controls the periodic process that reactor runs, and flooding quantity is controlled by electrical signal conduction by liquid level meter probes.Inlet unit comprises the submersible pump 4 and bucket 5 of intaking that are connected with reactor body, and water-in is positioned at reactor body top.Aeration unit comprises pneumatic pump 1, spinner-type flowmeter 2.1, porous aeration head 2.2, and aeration head is positioned at the bottom of reactor body, and aeration rate is regulated by the spinner-type flowmeter be connected in the middle of aeration head and pneumatic pump.Water unit comprises peristaltic pump 6 and goes out bucket, and water outlet adopts the spoil disposal thief hole 8 be positioned in the middle part of reactor body.
The aerobic particle mud enhancement method of the device described in a kind of basis, the cycle of operation is divided into into water-standing-aeration-precipitation-water outlet double teacher, seed sludge takes from municipal sewage plant aeration tank, shannon index is 4.79, mean in particle have higher flora abundance, the horizontal Bacterial community analysis of door finds, Proteobacteria and Bacteroidetes have accounted for more than 65%, these bacteriums are all the critical bacterial populations in aerobic particle mud, and energy aid-device realizes the quick particle of aerobic particle mud; Inoculation MLSS is 4-6g/L; Water inlet matrix is town sewage, and inlet COD concentration is 300-800 mg/L, covers the COD concentration range of general town sewage; Adopt the aspect ratio of 4-8, be conducive to granular sledge screening effect; Adopt the draining ratio of 30%-70%; The cycle of operation is 4-6 hour, increases sewage load while ensureing contaminant removal efficiency; Settling time is 5-15 minute, is conducive to washing out and granular sludge of floc sludge; Aeration time is 3-5 hour.
The aeration intensity of current aerobic particle mud technique is commonly 2cm/s-5cm/s, high aeration intensity not only brings high energy consumption problem, and granule sludge easily suppresses denitrification, affects grain pattern stability under the lasting high aeration shearing condition of aeration starvation phase simultaneously.In comparison, described aeration phase, initial start stage aeration intensity controls at 2.5 cms
-1, the aeration intensity 0.25-0.5 cms of aeration starvation phase after device is basicly stable, was reduced every 10 days
-1, the aeration intensity of final body system aeration starvation phase is down to 1.0 cms
-1, under the prerequisite ensureing pollutant removal, save the energy consumption of about 70% than common aerobic particle mud aeration system, energy-saving effect is remarkable.
Described aerobic particle mud is faint yellow spheroidal particle, and average diameter of particles is 0.2mm, and particle diameter is in distribution normal state, and grain pattern consolidation, surface have gully to ensure dissolved oxygen (DO) and nutritive substance mass transfer.In particle, microorganism is reunited closely, the zoogloea containing higher proportion, and be enriched with solar month of 30 days Pseudomonas, the functional floras such as Salmonella in distress and Nitraspira of making pottery.
embodiment 1
The aerobic particle mud technique processing town sewage in present case adopts a useful volume to be the sequencing batch reactor of 3.5L (SBR), as shown in Figure 1: the main body of reactor is columniform synthetic glass cylinder, the high 55cm of cylinder, internal diameter 9cm, multiple top-down spoil disposal thief hole 8 is arranged at side to bottom.Water-in is positioned at reactor top, by a submersible pump 4 by the town sewage suction reactor body in water inlet bucket 5.Aerating apparatus connects spinner-type flowmeter 2.1 by pneumatic pump 1 and porous aeration head 2.2 forms, and porous aeration head is placed in reactor shell bottom position.Water unit draws water to going out bucket 7 by a peristaltic pump 6 from reactor middle and lower part, and water outlet adopts the spoil disposal thief hole 8 be positioned in the middle part of reactor body.Reactor working procedure is controlled by a set of automatization time controller (PAC) 3 able to programme.
The implementation case adopts the operating process of above-mentioned reactor for treatment town sewage cultivation aerobic particle mud as follows: under the control of time controller, reactor runs according to the order of water inlet-standing-aeration-precipitation-water outlet.The initial operational conditions of reactor is: 3 hours cycles, wherein intakes 10 minutes, leaves standstill 25 minutes, aeration 137 minutes, sedimentation 5 minutes, draining 3 minutes.The surperficial gas speed that the porous aeration head that reactor bottom is installed provides is 2.5 cms
-1, volume-exchange ratio is 70%.The reactor start-up initial stage, be that the active floc sludge of 4.5g/L is inoculated in above-mentioned reactor by sludge concentration, town sewage is by submersible pump 4 suction, after running for some time in the manner described above, reactor indices is stablized, sludge quantity rises to some extent, and pollutant removal is constant in stable region.0.25 cms is reduced afterwards according to every 10 days
-1-0.5 cms
-1speed, by the surperficial gas of reactor aeration starvation phase speed by 2.5 cms
-1be reduced to 1.0 cms gradually
-1, move to aerobic particle mud indices in reactor gradually and stablize.
As shown in Figure 3,4, after aerobic particle mud has been cultivated, in reactor, sludge concentration has maintained 5-6g/L, and reactor for treatment effect stability, effluent quality is good.Gradient fall and expose to the sun after system NH
4 +-N, COD and TN clearance maintain 90%, 95%, more than 80% respectively, and contaminant removal efficiency is high, long-term operation performance is stable.
The process control mode (as shown in Figure 2) of aeration is reduced owing to have employed gradient, the energy expenditure of about 70% is decreased in operational process, overcome the problem that ordinary activated sludge aeration tank energy consumption is high, running cost is high, in actual sewage process, there is very important realistic meaning.
As shown in Figure 5, the aerobic particle mud cultivated in the present embodiment is that median size is comparatively large, the faint yellow spheroidal particle of size distribution normal state, and grain pattern consolidation, surface have comparatively rill gully to ensure dissolved oxygen (DO) and nutritive substance mass transfer; Compare ordinary activated sludge, microorganism in granule sludge is reunited closely, the zoogloea containing higher proportion, and be enriched with solar month of 30 days Pseudomonas, the functional floras such as Salmonella in distress and Nitraspira of making pottery.
Claims (9)
1. an energy-saving and cost-reducing aerobic particle mud strengthening steady operation device, it is characterized in that: comprise inlet unit, reactor body, aeration unit, water unit and time control unit, described time control unit is automatization time controller (3) able to programme, comprise time switch and liquid level meter probes, time switch controls the periodic process that reactor runs, and flooding quantity is controlled by electrical signal conduction by liquid level meter probes.
2. device according to claim 1, is characterized in that: described inlet unit, and comprise the submersible pump (4) and bucket (5) of intaking that are connected with reactor body, water-in is positioned at reactor body top.
3. device according to claim 1, is characterized in that: described reactor body is cylindrical, and multiple top-down spoil disposal thief hole (8) is arranged at side to bottom.
4. device according to claim 1, it is characterized in that: described aeration unit, comprise pneumatic pump (1), spinner-type flowmeter (2.1), porous aeration head (2.2), porous aeration head is positioned at the bottom of reactor body, and aeration rate regulates with the spinner-type flowmeter (2.1) in the middle of pneumatic pump by being connected to porous aeration head (2.2).
5. device according to claim 1, is characterized in that: described water unit, and comprise peristaltic pump (6) and go out bucket (7), water outlet adopts the spoil disposal thief hole (8) be positioned in the middle part of reactor body.
6. the aerobic particle mud enhancement method of device according to any one of claim 1-5, is characterized in that: the cycle of operation is divided into into water-leave standstill-aeration-precipitation-water outlet double teacher; Seed sludge, inoculation MLSS is 4-6g/L; Water inlet matrix is town sewage, and inlet COD concentration is 300-800 mg/L; Adopt the aspect ratio of 4-8 and the draining ratio of 30%-70%; The cycle of operation is 4-6 hour; Settling time is 5-15 minute; Aeration time is 3-5 hour.
7. aerobic particle mud enhancement method according to claim 6, it is characterized in that: described aeration phase, initial start stage aeration intensity controls at 2.5 cms
-1, the aeration intensity 0.25-0.5 cms of aeration starvation phase after device is basicly stable, was reduced every 10 days
-1, the aeration intensity of final body system aeration starvation phase is down to 1.0 cms
-1.
8. aerobic particle mud enhancement method according to claim 6; it is characterized in that: described seed sludge takes from municipal sewage plant aeration tank; shannon index is 4.79; the horizontal Bacterial community analysis of door finds; Proteobacteria and Bacteroidetes have accounted for more than 65%, and energy aid-device realizes the quick particle of aerobic particle mud.
9. aerobic particle mud enhancement method according to claim 7, it is characterized in that: described aerobic particle mud is faint yellow spheroidal particle, average diameter of particles is 0.2mm, particle diameter is in distribution normal state, grain pattern consolidation, surface have gully to ensure dissolved oxygen (DO) and nutritive substance mass transfer, in particle, microorganism is reunited closely, containing zoogloea, and be enriched with solar month of 30 days Pseudomonas, make pottery Salmonella in distress and Nitraspira functional flora.
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Cited By (6)
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| CN105776524A (en) * | 2016-05-24 | 2016-07-20 | 杭州普而环境科技有限公司 | Intensified starting and stable operation method for aerobic granular sludge |
| CN106830302A (en) * | 2017-01-20 | 2017-06-13 | 浙江大学 | The MBR complete nitrifications bacterium concentrating device and its method of dissolved oxygen Automated condtrol |
| CN107244731A (en) * | 2017-07-13 | 2017-10-13 | 浙江大学 | Effectively control the reactor assembly and method of aerobic particle mud system dissolved oxygen |
| CN107364954A (en) * | 2017-07-13 | 2017-11-21 | 浙江大学 | Reactor and method with the mud discharging device for strengthening aerobic particle mud stable operation |
| CN110054283A (en) * | 2019-04-26 | 2019-07-26 | 北京建筑大学 | A kind of nitrification spirillum granule sludge cultural method and device |
| CN112358037A (en) * | 2020-10-20 | 2021-02-12 | 浙江工业大学 | Pulse type aeration aerobic granular sludge reactor |
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Cited By (9)
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| CN107364954B (en) * | 2017-07-13 | 2020-10-20 | 浙江大学 | Reactor with sludge discharge device for strengthening stable operation of aerobic granular sludge and method |
| CN110054283A (en) * | 2019-04-26 | 2019-07-26 | 北京建筑大学 | A kind of nitrification spirillum granule sludge cultural method and device |
| CN112358037A (en) * | 2020-10-20 | 2021-02-12 | 浙江工业大学 | Pulse type aeration aerobic granular sludge reactor |
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