CN106809948A - A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation - Google Patents
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation Download PDFInfo
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- CN106809948A CN106809948A CN201611150082.3A CN201611150082A CN106809948A CN 106809948 A CN106809948 A CN 106809948A CN 201611150082 A CN201611150082 A CN 201611150082A CN 106809948 A CN106809948 A CN 106809948A
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- sludge
- reactor
- aerobic
- excess sludge
- feedback mechanism
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
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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
Abstract
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, methods described comprises the following steps：1) activated sludge in sewage disposal plant aeration tank is taken, is seeded in reactor with the input amount of 800mg/L~1200mg/L；2) use the sewage received as carbon source using acetic acid as water inlet, reactor is normally running；3) excess sludge of discharge is collected, it is 80% 95% to dry in the shade to moisture content, prepares target sludge；4) by step 3) in run in the prepared former reactor of target sludge input and normally；5) repeat step 3) and step 4), until aerobic sludge basic granulesization and stable operation in reactor.The present invention is formed biofeedback mechanism, is provided the granulating that the nuclei of condensation collectively promote aerobic sludge using discarded excess sludge using micropopulation sense effect and cell signaling molecule.
Description
Technical field
The invention belongs to field of sludge treatment, it is related to a kind of using excess sludge feedback mechanism promotion aerobic sludge granulation
Method.
Technical background
Aerobic Granular Sludge Technology compares ordinary activated sludge due to good settling property, high sludge concentration, energy
Enough bear the characteristics such as high organic loading, load impact and noxious material, the focus just studied as all circles and reported.It is general next
Say, the formation of aerobic particle mud is a complex process comprising physics, chemistry and biological agent, main flow view is by this mistake
Journey is described as under certain hydrodynamic condition, the organism clustering phenomena that microorganism self-cohesion action is formed.Learn both at home and abroad
Person proposes various aerobic grains according to different reactors, experimental technique, research purpose etc. on the basis of respective experimental study
Sludge formation mechenism.At present, aerobic particle mud formed main flow mechanism mainly have Extracellular polymers hypothesis, self-coagulation principle,
Der Pilz hypothesis and nuclei of condensation mechanism.Recent studies have shown that, during aerobic sludge granulation, the signal communication between microorganism
Also play an important role.
Nuclei of condensation mechanism be exactly aerobic particle mud formation first have to a nuclei of condensation come for microorganism aggregation and
Growth provides place, the biomembrane, larger for such as being formed on suspended particulate, the anaerobism of inoculation or aerobic particle mud, reactor wall
Der Pilz etc..Inorganic little particle in water can carry a small amount of positive charge in the presence of hydraulic shear, can adsorb certain
The negatively charged microorganism such as the bacterium of amount：Organic little particle in water can secrete extracellular polymer under hydraulic shear effect
Thing, improves the hydrophobicity of cell surface, reduces cell surface Gibbs free energy, is that cell-cell interaction and sticking is provided with
Sharp condition.The operating modes such as certain sedimentation time, sedimentation depth are controlled to create certain selection pressure in the reactor, by larger particles
Stay in reactor, so that the nuclei of condensation and the microorganism sticked thereon have the time of abundance and nutriment to grow, and further
Stick more microorganisms, form the irregular mud granule of profile, i.e. embryo particle sludge.Embryo particle sludge is cut in waterpower
The aerobic particle mud with irregular figure and perpendicular reality 3-D solid structure is gradually formed in the presence of shear force, when particle reaches one
Due to the limitation of oxygen transfer and matrix mass transfer after being sized, particle size stops increasing, and the aerobic particle mud for now being formed is
Ripe aerobic particle mud.Research shows that aerobic sludge can produce group's sense effect of detail, relevant cell letter in granulating
Number molecule is played an important role wherein, and group's sense effect can accelerate the synthesis of sludge extracellular polymeric, improve microorganism table
Your kilometer is adhered in face, and signaling molecule can promote microorganism secretion extracellular polymeric and influence the formation of biomembrane, such as c-di-
The increase of GMP signaling molecules etc. can promote the formation of aerobic particle mud.
The content of the invention
The problems such as to overcome the cycle of current aerobic particle mud culture long, easy unstability, the present invention provides a kind of simple, warp
Ji, the efficient method for promoting aerobic sludge granulation using excess sludge feedback mechanism.
Following technical scheme is provided in order to solve foregoing problems：
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, comprises the following steps：
1) activated sludge in sewage disposal plant aeration tank is taken, is seeded to instead with the input amount of 800mg/L~1200mg/L
In answering device；
2) use the sewage received as carbon source using acetic acid as water inlet, reactor is normally running；
3) excess sludge of discharge is collected, it is 80%-95% to dry in the shade to moisture content, prepares target sludge；
4) by step 3) in run in the prepared former reactor of target sludge input and normally；
5) repeat step 3) and step 4), until aerobic sludge basic granulesization and stable operation in reactor.
Technology design of the invention is：The present invention combines micropopulation sense effect and cell signaling molecule, will be lighter
The excess sludge of discharge reactor is chosen, by Returning reactor after the technical finesse means such as appropriate desiccation, forms a kind of raw
Thing feedback mechanism promotes the microorganism in reactor to be intended to collection coalescence granulating；Nuclei of condensation mechanism is utilized simultaneously, it is surplus using original
Extracellular polymeric that remaining sludge is carried etc. is used as binding agent so that the sludge after treatment has certain bulk or flocculation group etc. raw
Thing gathers bulk properties, for the granulating of aerobic sludge provides certain nuclei of condensation, beneficial to the formation of granule sludge；Excess sludge source
In reactor, microorganism is homologous adventive, and biotic intrusion phenomenon is not resulted in the microorganism in reactor.Dry in the shade to
Moisture content forms biofeedback for the sludge of 80%-95% can keep microbial activity, and block or group's shape can be certainly condensed into again
Into the nuclei of condensation, it is ensured that the realization of aforementioned mechanism.Excess sludge is also carried out into recycling treatment simultaneously, certain economic effect is obtained
Benefit.
Beneficial effects of the present invention are mainly reflected in：
(1) micropopulation sense effect and cell signaling molecule are utilized, a kind of biofeedback mechanism is artificially created and is promoted
Oxygen granular sludge.
(2) nuclei of condensation mechanism is utilized, during the sludge after technical finesse thrown back into reactor, promotion aerobic sludge granulation,
Simultaneously homologous microorganism does not result in biotic intrusion influence.
(2) changing waste into resources, recycling treatment is carried out using excess sludge, reduces sludge output.
(3) it is simple to operate, it is only necessary to appropriate drying and other treatment, process is simple, low cost.
(4) aerobic particle mud prepared by induction is high, heavy with closely knit, treatment effeciency compared with common activated sludge
The drop advantage such as performance is good.
Specific embodiment
With reference to specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in
This.
Example 1
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, comprises the following steps：
1) activated sludge in sewage disposal plant aeration tank is taken, sequencing batch reactor is seeded to the input amount of 800mg/L
In.
2) use received with acetic acid, aoxidize ammonia, potassium dihydrogen phosphate be configured to COD as 1000mg/L, NH4 +- N concentration is 60mg/
L, TP concentration are the sewage of 10mg/L, continuous operation：Time of repose as lh is set, aeration time is 3h, and reactor normally runs.
3) excess sludge of discharge is collected, it is 80% to dry in the shade to moisture content, prepares target sludge.
4) by step 3) in run in the prepared former reactor of target sludge input and normally, occur largely in reactor
Bulk not of uniform size or bulk sludge.
5) repeat step 3) and step 4), after running 15 days, until the granulating in reactor reaches 80%, granule sludge
SVI<50ml/g, settling property is good.
The present invention has closely knit, treatment effeciency high using the granule sludge that excess sludge feedback mechanism is formed, settling property
The advantage such as good.85% or so, the clearance of ammonia nitrogen substantially remains in 90% or so, TP clearances 70% to the clearance of COD
More than, 20~30m/h of sinking speed, sludge volume index (SVI) drops to below 55ml/g from the 140ml/g of seed sludge.
Example 2
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, comprises the following steps：
1) activated sludge in sewage disposal plant aeration tank is taken, sequencing batch reactor is seeded to the input amount of 900mg/L
In.
2) use received with acetic acid, aoxidize ammonia, potassium dihydrogen phosphate be configured to COD as 1000mg/L, NH4 +- N concentration is 60mg/
L, TP concentration are the sewage of 10mg/L, continuous operation：Time of repose as lh is set, aeration time is 3h, and reactor normally runs.
3) excess sludge of discharge is collected, it is 90% to dry in the shade to moisture content, prepares target sludge.
4) by step 3) in run in the prepared former reactor of target sludge input and normally, occur largely in reactor
Bulk not of uniform size or bulk sludge.
5) repeat step 3) and step 4), after running 15 days, until the granulating in reactor reaches 76%, granule sludge
SVI<48ml/g, settling property is good.
The present invention has closely knit, treatment effeciency high using the granule sludge that excess sludge feedback mechanism is formed, settling property
The advantage such as good.85% or so, the clearance of ammonia nitrogen substantially remains in 95% or so, TP clearances 70% to the clearance of COD
More than, 20~30m/h of sinking speed, sludge volume index (SVI) drops to below 48ml/g from the 140ml/g of seed sludge.
Example 3
A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, comprises the following steps：
1) activated sludge in sewage disposal plant aeration tank is taken, sequencing batch reactor is seeded to the input amount of 1000mg/L
In.
2) use received with acetic acid, aoxidize ammonia, potassium dihydrogen phosphate be configured to COD as 1000mg/L, NH4 +- N concentration is 60mg/
L, TP concentration are the sewage of 10mg/L, continuous operation：Time of repose as lh is set, aeration time is 3h, and reactor normally runs.
3) excess sludge of discharge is collected, it is 95% to dry in the shade to moisture content, prepares target sludge.
4) by step 3) in run in the prepared former reactor of target sludge input and normally, occur largely in reactor
Bulk not of uniform size or bulk sludge.
5) repeat step 3) and step 4), after running 20 days, until the granulating in reactor reaches 70%, granule sludge
SVI<50ml/g, settling property is good.
The present invention has closely knit, treatment effeciency high using the granule sludge that excess sludge feedback mechanism is formed, settling property
The advantage such as good.90% or so, the clearance of ammonia nitrogen substantially remains in 95% or so, TP clearances 70% to the clearance of COD
More than, 20~30m/h of sinking speed, sludge volume index (SVI) drops to below 50ml/g from the 140ml/g of seed sludge.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
Various changes, modification, replacement and modification can be carried out in the case of departing from principle of the invention and objective to embodiment, the present invention
Scope limited by claim and its equivalent.
Claims (1)
1. a kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation, it is characterised in that：Methods described bag
Include following steps：
1) activated sludge in sewage disposal plant aeration tank is taken, reactor is seeded to the input amount of 800mg/L~1200mg/L
In；
2) use the sewage received as carbon source using acetic acid as water inlet, reactor is normally running；
3) excess sludge of discharge is collected, it is 80%-95% to dry in the shade to moisture content, prepares target sludge；
4) by step 3) in run in the prepared former reactor of target sludge input and normally；
5) repeat step 3) and step 4), until aerobic sludge basic granulesization and stable operation in reactor.
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| CN201611150082.3A CN106809948A (en) | 2016-12-14 | 2016-12-14 | A kind of method that utilization excess sludge feedback mechanism promotes aerobic sludge granulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573853A (en) * | 2020-05-29 | 2020-08-25 | 南京大学 | Method for reducing toxicity of wastewater treated by biological method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229460A (en) * | 2011-05-27 | 2011-11-02 | 浙江工业大学 | Method for inducing aerobic sludge to granulate by using sludge micropowder |
| CN106167340A (en) * | 2016-08-22 | 2016-11-30 | 浙江工业大学 | A kind of AAO continuous-flow aerobic granular sludge denitrification dephosphorization technique and system |
-
2016
- 2016-12-14 CN CN201611150082.3A patent/CN106809948A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229460A (en) * | 2011-05-27 | 2011-11-02 | 浙江工业大学 | Method for inducing aerobic sludge to granulate by using sludge micropowder |
| CN106167340A (en) * | 2016-08-22 | 2016-11-30 | 浙江工业大学 | A kind of AAO continuous-flow aerobic granular sludge denitrification dephosphorization technique and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111573853A (en) * | 2020-05-29 | 2020-08-25 | 南京大学 | Method for reducing toxicity of wastewater treated by biological method |
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