CN106396271B - A method of improving activated sludge settling property - Google Patents
A method of improving activated sludge settling property Download PDFInfo
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- CN106396271B CN106396271B CN201610955148.XA CN201610955148A CN106396271B CN 106396271 B CN106396271 B CN 106396271B CN 201610955148 A CN201610955148 A CN 201610955148A CN 106396271 B CN106396271 B CN 106396271B
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- 239000010802 sludge Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 46
- 239000007787 solid Substances 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000001301 oxygen Substances 0.000 claims abstract description 26
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 26
- 230000005484 gravity Effects 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 22
- 238000005273 aeration Methods 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 8
- 241001148470 aerobic bacillus Species 0.000 claims abstract description 7
- 239000011362 coarse particle Substances 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims description 20
- 230000000694 effects Effects 0.000 claims description 11
- 239000013618 particulate matter Substances 0.000 claims description 11
- 239000013527 degreasing agent Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 5
- 239000012634 fragment Substances 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- LTSWUFKUZPPYEG-UHFFFAOYSA-N 1-decoxydecane Chemical class CCCCCCCCCCOCCCCCCCCCC LTSWUFKUZPPYEG-UHFFFAOYSA-N 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 230000029087 digestion Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000084 colloidal system Substances 0.000 abstract description 7
- 239000012528 membrane Substances 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 239000005416 organic matter Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000001376 precipitating effect Effects 0.000 description 3
- 241000589651 Zoogloea Species 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- -1 polyoxy Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F3/1205—Particular type of activated sludge processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention discloses a kind of methods for improving activated sludge settling property, by the waste water containing activated sludge by pretreatment；By gravitational settling, the good activated sludge solids of settling property are separated；The part of settling property difference is delivered to aeration tank and carries out Air Exposure, obtains oxygen-containing solidliquid mixture；Gravity Separation is carried out by hydrocyclone again, obtains coarse particles substance and dope and liquid-solid suspended matter；Coarse particles object and dope obtain the activated sludge that settling property is improved by gravitational settling；Merge.The present invention improves by aeration tank the activated sludge for the settling property difference isolated the BOD loading of activated sludge, while by aerobic bacteria consumption excess organic matter and nitrogen, preventing sludge anaerobic from fermenting；Finally again by Gravity Separation, removal can cause fouling membrane and induce the colloid composition and small particle of the fouling of film air diffuser, be effectively improved the settling property of activated sludge；Present invention process is simple, has very extensive industrial application value.
Description
Technical field
The present invention relates to environmental protection technical fields, are specifically related to a kind of method for improving activated sludge settling property.
Background technique
Activated sludge is that microorganism and suspended material, colloidal substance coagulation weave in are formed by flocculent substance, it
The center of structure and function be zoogloea on zoogloea, grow bacterium, fungi, protozoan and certain metazoas,
These microorganisms can secrete the colloid substance with adherence, there is strong adsorption energy to molecule and dissolved organic matter
Power collides under the action of water flow with suspended particulate, adhesion, forms active pollution index.Muddy water is carried out by gravity
Separation is the important link in active sludge processing system, and the settling property of sludge determines the whole efficiency for the treatment of process.
In biological treatment system, the settling property of the characteristic of activated sludge, especially sludge directly affects secondary settling tank
Technological design and operation.Poor Sedimentary Properties about Activated Sludge may be due to following, and 1 sludge loading is too low, 2 sludge
It expands, the poisoning of 3 sludge.The parameter for measuring activated sludge settling property has two: first is that sludge index SVI (mL/g)；Two
It is sludge settling ratio: SV%.The physical significance of SVI is: aeration tank export mixed liquor through 30min it is quiet it is heavy after, every gram of dewatered sludge institute
Volume shared by the precipitating sludge of formation (mL).SV% is also known as 30 minutes settling ratios, after mixed liquor stands 30 minutes in graduated cylinder
The volume for being formed by precipitating sludge accounts for the percentage of former mixed liquor volume.SVI value can reflect the cohesion of activated sludge, precipitating
Performance, too low to illustrate that mud pellet is tiny, inorganic content is high, and sludge lacks activity；It is excessively high, illustrate that sludge settling property is bad, and
With the intumescent possibility of generation.
The present invention is by isolating the activated sludge of the good activated sludge of settling property and settling property difference, and to settleability
Activated sludge that can be poor is improved, in the hope of obtaining the activated sludge of excellent settling proper.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of methods for improving activated sludge settling property.
The technical scheme is that a kind of method for improving activated sludge settling property, comprising the following steps:
(1) waste water containing activated sludge is removed into gravel, stone, fragment, adding degreaser will give up by pretreatment
The grease dispersed in water removes together with other organic dirty substances；
(2) solidliquid mixture being delivered to sedimentation basin or defecator that bottom is taper will be sunk by gravitational settling
It drops the good activated sludge solids separation of performance and is exported from bottom；
(3) the remaining mixture of the sedimentation basin of the taper or defecator top is delivered to aeration tank, in aeration tank
It is passed through oxygen, is proliferated aerobic bacteria, excessive organic matter and nitrogen is consumed, improves sludge activity, obtain oxygen-containing solidliquid mixture；
(4) oxygen-containing solidliquid mixture is subjected to Gravity Separation, the Gravity Separation is mainly by hydrocyclone come complete
At, oxygen-containing solidliquid mixture depended on pressure or gravity are tangentially entered by hydrocyclone top, under the action of the centrifugal force, slightly
Weight particulate matter is thrown to wall and rotates the dope downwards and formed and is discharged together, and lesser particulate matter rotates to certain journey
It is discharged after degree with secondary upper bumpy flow, obtains liquid-solid suspended matter, the liquid-solid suspended matter is discharged as waste material；It is described liquid-solid
Include small particle in suspended matter, and containing the colloid composition that can cause MBR fouling membrane, induces the fouling of film air diffuser；
(5) the coarse particles object and dope that are discharged in step (4) from hydrocyclone bottom are made a gift to someone auxiliary air separator, institute
Stating auxiliary air separator is also that the sedimentation basin or defecator that bottom is taper obtain solid portion and liquid portion by gravitational settling
Point, the solid portion is the activated sludge that settling property is improved, and is discharged liquid portion as waste material；
(6) settling property isolated activated sludge that settling property obtained by step (5) is improved and step (2) is good
Activated sludge solids merge to get arrive excellent settling proper activated sludge.
Further, the degreaser is the polyoxyalkylene isocetyl decyl for being 0.003-1% by weight percent
The fatty alcohol ether sulphur that lauryl sodium sulfate that ether, weight percent are 0.005-0.2%, weight percent are 0.005-1%
Sour sodium composition, obtains solidliquid mixture.
Further, adjusting the speed that the oxygen-containing solidliquid mixture passes through hydrocyclone is 5-20m3/ h, with control
The settled density and settling amount of bottom solid, flow velocity it is excessive or it is too small will lead to settling amount and settled density is unreasonable, can be with
Guarantee relief flow rate in reasonable range.
Further, the hydrocyclone centrifugal speed is 800-3000r/min.
Further, step (4) the lesser particulate matter refers to that partial size is less than the particulate matter of 0.06mm.
Further, the method is suitable for the aerobic biological treatment process of suspension growth, integrated fixed film activity sludge
Technique, biological denitrification phosphorous removal technique, aerobic nitrification or anaerobic digestion process, are of wide application.
The beneficial effects of the present invention are: the present invention is separated activated sludge for the first time, the good activity of settling property is obtained
Sludge, then the activated sludge of settling property difference is improved, it is then combined with merging, the activity for obtaining excellent settling proper is dirty
Mud；For the activated sludge for the settling property difference isolated, the present invention is negative by the BOD of aeration tank raising activated sludge first
Lotus to improve sludge settling property, while consuming excessive organic matter and nitrogen by aerobic bacteria, prevents sludge anaerobic from fermenting, improve
The flocculation sedimentation performance of activated sludge；Finally again by Gravity Separation, removal can cause fouling membrane and induce film air diffuser
The colloid composition of fouling and small particle further improve the settling property of activated sludge；Present invention process is simple, to sludge
Settling property be greatly improved, have very extensive industrial application value.
Specific embodiment
The present invention is further described in detail below with reference to specific implementation method.
Embodiment 1:
A method of improving activated sludge settling property, comprising the following steps:
(1) waste water containing activated sludge is removed into gravel, stone, fragment, adding degreaser will give up by pretreatment
The grease dispersed in water removes together with other organic dirty substances, and it is 0.003% that the degreaser, which is by weight percent,
Lauryl sodium sulfate that polyoxyalkylene isocetyl decyl ethers, weight percent are 0.005%, weight percent are
0.005% fatty alcohol-ether sodium sulfate composition, obtains solidliquid mixture；
(2) solidliquid mixture being delivered to sedimentation basin or defecator that bottom is taper will be sunk by gravitational settling
It drops the good activated sludge solids separation of performance and is exported from bottom；
(3) the remaining mixture of the sedimentation basin of the taper or defecator top is delivered to aeration tank, in aeration tank
It is passed through oxygen, is proliferated aerobic bacteria, excessive organic matter and nitrogen is consumed, improves sludge activity, obtain oxygen-containing solidliquid mixture；
(4) oxygen-containing solidliquid mixture is subjected to Gravity Separation, the Gravity Separation is mainly by hydrocyclone come complete
At, oxygen-containing solidliquid mixture depended on pressure or gravity are tangentially entered by hydrocyclone top, under the action of the centrifugal force, slightly
Weight particulate matter is thrown to wall and rotates the dope downwards and formed and is discharged together, and particulate matter of the partial size less than 0.06mm revolves
It is discharged after going to a certain degree with secondary upper bumpy flow, obtains liquid-solid suspended matter, the liquid-solid suspended matter is discharged as waste material；
Include small particle in the liquid-solid suspended matter, and containing the colloid composition that can cause MBR fouling membrane, induces film air and expand
Dissipate device fouling；
In the gravity based separation process of hydrocyclone, the speed that the oxygen-containing solidliquid mixture passes through hydrocyclone is adjusted
Degree is 5m3/ h, to control the settled density and settling amount of bottom solid, flow velocity is excessive or too small will lead to settling amount and settles close
It spends unreasonable, it can also be ensured that relief flow rate is in reasonable range；The hydrocyclone centrifugal speed is 800r/min；
(5) the coarse particles object and dope that are discharged in step (4) from hydrocyclone bottom are made a gift to someone auxiliary air separator, institute
Stating auxiliary air separator is also that the sedimentation basin or defecator that bottom is taper obtain solid portion and liquid portion by gravitational settling
Point, the solid portion is the activated sludge that settling property is improved, and is discharged liquid portion as waste material；
(6) settling property isolated activated sludge that settling property obtained by step (5) is improved and step (2) is good
Activated sludge solids merge to get arrive excellent settling proper activated sludge.
The present embodiment method is used in integrated fixed film activity sludge processes, the settling property of activated sludge is changed
Kind, the sedimentation index SVI of activated sludge has reached 106ml/g.
Embodiment 2:
A method of improving activated sludge settling property, comprising the following steps:
(1) waste water containing activated sludge is removed into gravel, stone, fragment, adding degreaser will give up by pretreatment
The grease dispersed in water removes together with other organic dirty substances, and it is 0.5015% that the degreaser, which is by weight percent,
Lauryl sodium sulfate that polyoxyalkylene isocetyl decyl ethers, weight percent are 0.1025%, weight percent are
0.5025% fatty alcohol-ether sodium sulfate, obtains solidliquid mixture；
(2) solidliquid mixture being delivered to sedimentation basin or defecator that bottom is taper will be sunk by gravitational settling
It drops the good activated sludge solids separation of performance and is exported from bottom；
(3) the remaining mixture of the sedimentation basin of the taper or defecator top is delivered to aeration tank, in aeration tank
It is passed through oxygen, is proliferated aerobic bacteria, excessive organic matter and nitrogen is consumed, improves sludge activity, obtain oxygen-containing solidliquid mixture；
(4) oxygen-containing solidliquid mixture is subjected to Gravity Separation, the Gravity Separation is mainly by hydrocyclone come complete
At, oxygen-containing solidliquid mixture depended on pressure or gravity are tangentially entered by hydrocyclone top, under the action of the centrifugal force, slightly
Weight particulate matter is thrown to wall and rotates the dope downwards and formed and is discharged together, and partial size is less than the particulate matter of 0.06mm
It is discharged after rotation to a certain extent with secondary upper bumpy flow, obtains liquid-solid suspended matter, the liquid-solid suspended matter is arranged as waste material
Out；Include small particle in the liquid-solid suspended matter, and containing the colloid composition that can cause MBR fouling membrane, induces film air
Diffuser fouling；
In the gravity based separation process of hydrocyclone, the speed that the oxygen-containing solidliquid mixture passes through hydrocyclone is adjusted
Degree is 12.5m3/ h, to control the settled density and settling amount of bottom solid, flow velocity is excessive or the too small settling amount and heavy of will lead to
It is unreasonable that density drops, it can also be ensured that relief flow rate is in reasonable range；The hydrocyclone centrifugal speed is 1900r/
min；
(5) the coarse particles object and dope that are discharged in step (4) from hydrocyclone bottom are made a gift to someone auxiliary air separator, institute
Stating auxiliary air separator is also that the sedimentation basin or defecator that bottom is taper obtain solid portion and liquid portion by gravitational settling
Point, the solid portion is the activated sludge that settling property is improved, and is discharged liquid portion as waste material；
(6) settling property isolated activated sludge that settling property obtained by step (5) is improved and step (2) is good
Activated sludge solids merge to get arrive excellent settling proper activated sludge.
The present embodiment method is used in the aerobic biological treatment process of suspension growth, to the settling property of activated sludge into
Row improves, and the sedimentation index SVI of activated sludge has reached 110ml/g.
Embodiment 3:
A method of improving activated sludge settling property, comprising the following steps:
(1) waste water containing activated sludge is removed into gravel, stone, fragment, adding degreaser will give up by pretreatment
The grease dispersed in water removes together with other organic dirty substances, and the degreaser is the polyoxy for being 1% by weight percent
Change the fat that alkene isocetyl decyl ethers, the lauryl sodium sulfate that weight percent is 0.2%, weight percent are 1%
Ether sulfate composition, obtains solidliquid mixture；
(2) solidliquid mixture being delivered to sedimentation basin or defecator that bottom is taper will be sunk by gravitational settling
It drops the good activated sludge solids separation of performance and is exported from bottom；
(3) the remaining mixture of the sedimentation basin of the taper or defecator top is delivered to aeration tank, in aeration tank
It is passed through oxygen, is proliferated aerobic bacteria, excessive organic matter and nitrogen is consumed, improves sludge activity, obtain oxygen-containing solidliquid mixture；
(4) oxygen-containing solidliquid mixture is subjected to Gravity Separation, the Gravity Separation is mainly by hydrocyclone come complete
At, oxygen-containing solidliquid mixture depended on pressure or gravity are tangentially entered by hydrocyclone top, under the action of the centrifugal force, slightly
Weight particulate matter is thrown to wall and rotates the dope downwards and formed and is discharged together, and particulate matter of the partial size less than 0.06mm revolves
It is discharged after going to a certain degree with secondary upper bumpy flow, obtains liquid-solid suspended matter, the liquid-solid suspended matter is discharged as waste material；
Include small particle in the liquid-solid suspended matter, and containing the colloid composition that can cause MBR fouling membrane, induces film air and expand
Dissipate device fouling；
In the gravity based separation process of hydrocyclone, the speed that the oxygen-containing solidliquid mixture passes through hydrocyclone is adjusted
Degree is 20m3/ h, to control the settled density and settling amount of bottom solid, flow velocity is excessive or too small will lead to settling amount and sedimentation
Density is unreasonable, it can also be ensured that relief flow rate is in reasonable range；The hydrocyclone centrifugal speed is 3000r/
min；
(5) the coarse particles object and dope that are discharged in step (4) from hydrocyclone bottom are made a gift to someone auxiliary air separator, institute
Stating auxiliary air separator is also that the sedimentation basin or defecator that bottom is taper obtain solid portion and liquid portion by gravitational settling
Point, the solid portion is the activated sludge that settling property is improved, and is discharged liquid portion as waste material；
(6) settling property isolated activated sludge that settling property obtained by step (5) is improved and step (2) is good
Activated sludge solids merge to get arrive excellent settling proper activated sludge.
The present embodiment method is used in biological denitrification phosphorous removal technique, the settling property of activated sludge is improved, it is living
The sedimentation index SVI of property sludge has reached 115ml/g.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (6)
1. a kind of method for improving activated sludge settling property, which comprises the following steps:
(1) waste water containing activated sludge is removed into gravel, stone, fragment by pretreatment, then with degreaser by waste water points
Scattered grease removes together with other organic dirty substances, obtains solidliquid mixture；
(2) solidliquid mixture is delivered to the sedimentation basin or defecator that bottom is taper, by gravitational settling, by settleability
Activated sludge solids that can be good are separated and are exported from bottom；
(3) the remaining mixture of the sedimentation basin of the taper or defecator top is delivered to aeration tank, to being passed through in aeration tank
Oxygen is proliferated aerobic bacteria, improves sludge activity, obtains oxygen-containing solidliquid mixture；
(4) oxygen-containing solidliquid mixture being subjected to Gravity Separation, the Gravity Separation is mainly to be completed by hydrocyclone,
Oxygen-containing solidliquid mixture depended on pressure or gravity are tangentially entered by hydrocyclone top, under the action of the centrifugal force, big and heavy
Grain substance is thrown to wall and rotates the dope downwards and formed and is discharged together, with two after finely ground particle substance rotation to a certain extent
Secondary upper bumpy flow discharge, obtains liquid-solid suspended matter, the liquid-solid suspended matter is discharged as waste material；
(5) the coarse particles object and dope that are discharged in step (4) from hydrocyclone bottom are sent into auxiliary air separator, it is described auxiliary
Helping separator is also that the sedimentation basin or defecator that bottom is taper obtain solid portion and liquid portion by gravitational settling, institute
Stating solid portion is the activated sludge that settling property is improved, and is discharged liquid portion as waste material；
(6) activated sludge for being improved settling property obtained by step (5) and the settling property of step (2) initial gross separation out are good
Activated sludge solids merge to get arrive excellent settling proper activated sludge.
2. a kind of method for improving activated sludge settling property as described in claim 1, which is characterized in that the degreaser is
The solidliquid mixture being made of polyoxyalkylene isocetyl decyl ethers, lauryl sodium sulfate, fatty alcohol-ether sodium sulfate.
3. a kind of method for improving activated sludge settling property as described in claim 1, which is characterized in that adjust described oxygen-containing
The speed that solidliquid mixture passes through hydrocyclone is 5-20m3/h。
4. a kind of method for improving activated sludge settling property as described in claim 1, which is characterized in that the hydraulic cyclone
Device centrifugal speed is 800-3000r/min.
5. a kind of method for improving activated sludge settling property as described in claim 1, which is characterized in that step (4) is described
Finely ground particle substance refer to partial size be less than 0.06mm particulate matter.
6. a kind of method for improving activated sludge settling property as described in claim 1, which is characterized in that the method is applicable in
Aerobic biological treatment process, integrated fixed film activity sludge processes, biological denitrification phosphorous removal technique, aerobic nitrification in suspension growth
Or anaerobic digestion process.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301673A (en) * | 1999-12-29 | 2001-07-04 | 孙复华 | Vertical sectional integrated waste water biochemical treatment method and device |
| CN101585593A (en) * | 2008-05-20 | 2009-11-25 | 海斯博特（北京）科技有限公司 | Rotational flow strengthening and sedimentation integrated active sludge biochemical treatment device |
| CN102030410A (en) * | 2010-11-15 | 2011-04-27 | 北京精瑞科迈净水技术有限公司 | Improved magnetic powder high concentration activated sludge process for sewage treatment |
| CN102126785A (en) * | 2011-01-20 | 2011-07-20 | 北京城市排水集团有限责任公司 | Device for sorting sludge with high sedimentation performance by activated sludge process and process |
| CN105565491A (en) * | 2014-10-16 | 2016-05-11 | 中国石油化工股份有限公司 | Activated sludge treatment method and system for wastewater |
| CN105731728A (en) * | 2016-02-29 | 2016-07-06 | 上海大学 | Method and process device for improving activated sludge settling performance |
-
2016
- 2016-10-27 CN CN201610955148.XA patent/CN106396271B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301673A (en) * | 1999-12-29 | 2001-07-04 | 孙复华 | Vertical sectional integrated waste water biochemical treatment method and device |
| CN101585593A (en) * | 2008-05-20 | 2009-11-25 | 海斯博特（北京）科技有限公司 | Rotational flow strengthening and sedimentation integrated active sludge biochemical treatment device |
| CN102030410A (en) * | 2010-11-15 | 2011-04-27 | 北京精瑞科迈净水技术有限公司 | Improved magnetic powder high concentration activated sludge process for sewage treatment |
| CN102126785A (en) * | 2011-01-20 | 2011-07-20 | 北京城市排水集团有限责任公司 | Device for sorting sludge with high sedimentation performance by activated sludge process and process |
| CN105565491A (en) * | 2014-10-16 | 2016-05-11 | 中国石油化工股份有限公司 | Activated sludge treatment method and system for wastewater |
| CN105731728A (en) * | 2016-02-29 | 2016-07-06 | 上海大学 | Method and process device for improving activated sludge settling performance |
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