CN104692529A - Biological phosphorus removal system construction method based on particle and floc coexistence - Google Patents
Biological phosphorus removal system construction method based on particle and floc coexistence Download PDFInfo
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- CN104692529A CN104692529A CN201510148268.4A CN201510148268A CN104692529A CN 104692529 A CN104692529 A CN 104692529A CN 201510148268 A CN201510148268 A CN 201510148268A CN 104692529 A CN104692529 A CN 104692529A
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- particle
- phosphorus removal
- sludge
- removal system
- biological phosphorus
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
Abstract
The invention discloses a biological phosphorus removal system construction method based on particle and floc coexistence, relates to the biological phosphorus removal system construction method, and aims at solving the technical problems that flocculent activated sludge is not prone to sedimentation, the stability of granule sludge is poor, and requirements for culture conditions of the granule sludge are severe. The method comprises the steps that sludge is inoculated into a secondary sedimentation tank, artificial waste water which takes sodium propionate as a carbon source is added into the secondary sedimentation tank, anaerobic agitation is conducted, aerobic reaction is conducted, sedimentation is conducted, and drainage is conducted. By means of he biological phosphorus removal particles and floc sludge system cultivated through the method, the dynamic stability of particles and flocs can be kept in six-month running time, and good phosphorus removal capability and sludge sedimentation performance are achieved. By means of the biological phosphorus removal system construction method based on the particle and floc coexistence, after the system is run for fifty days, the ratio of particles to total sludge quantity ranges from 47% to 67%, the sludge sedimentation index ranges from 35 mL/g to 56 mL/g, the removal rate of COD is over 90%, and the removal rate of PO4<3->-P is over 95%. The invention belongs to the technical field of biological treatment of waste water.
Description
Technical field
The invention belongs to technical field of biological treatment of wastewater, be specifically related to a kind of Biological Phosphorus Removal System construction process.
Background technology
For controlling the phosphorus content of sewage effluents, as enhanced biological phosphorus removal technology (the EnhancedBiological Phosphorus Removal of economy and sustainability, EBPR) be widely used in sewage work, mud in this technology alternately experiences anaerobism, aerobic environment, and the phosphoric acid salt in sewage stores in vivo with the form of poly-phosphorus and discharges system with the form of excess sludge by the excessive suction phosphorus ability had with the polyP bacteria of enrichment in system.Mud in current enhanced biological phosphorus removal mainly exists with the form of cotton-shaped active sludge, and flco particle diameter is little, active high, but the relative not free settling of mud, easily there is sludge bulking, affect effluent quality; Require shorter sludge age, this and the long sludge age contradiction simultaneously required required for the nitrobacteria of denitrogenation simultaneously, denitrogenation dephosphorizing can not be completed in same system; In addition, the process that dephosphorization excess sludge is follow-up easily occurs that the release again of phosphorus causes secondary pollution.
Granule sludge is as being that a kind of structure is closely knit, and sharpness of border, is easy to the microbial aggregate separated from solution, has higher sludge concentration, good settling character, and capacity of resisting impact load enjoys by force the concern of domestic and international sewage treatment area worker.What mainly adopt about the cultivation of aerobic particle mud at present is sbr reactor device compared with larger ratio of height to diameter, the floc sludge of settling property difference in SBR system is washed out by shortening the sludge settling time, stay in the reactor by the mud that settling property is good, under the effect of the shearing forces such as aeration agitation, sludge accumulation forms the closely knit granule sludge of structure.Granule sludge system also exists at cultivation stage, and mud runs off in a large number, the problem of system crash.In addition, the cultivation of aerobic particle mud requires high to the aspect ratio of reactor, and the settling time requires short, the operation of system is wayward, and grain pattern is closely knit simultaneously, and granule interior resistance to mass transfer is large, activity and the granule stability of granule sludge are poor, easily disintegrate, not easily the problem such as broadened application.
Summary of the invention
The object of the invention is to solve cotton-shaped active sludge not free settling, granule sludge poor stability, the technical problem that the fostering requirement of granule sludge carries out in the SBR that aspect ratio is very large, provides a kind of Biological Phosphorus Removal System construction process coexisted based on particle-flco.
Granule sludge is formed in the sbr reactor device of low ratio of height to diameter, and under the drive of granule sludge gravity, the settleability of flco increases, under the existence of flco, floc sludge continues cohesion and changes granule sludge into, compensate for granule sludge poor stability, be easy to disintegrate the problem causing system crash to bring.
The Biological Phosphorus Removal System construction process coexisted based on particle-flco is as follows:
Second pond mud is inoculated in sequencing batch reactor SBR, the concentration of seed sludge is 2000-4000mg/L, be 10-25 DEG C in temperature of reaction, the volume exchange rate of sequencing batch reactor SBR is 50%, the aspect ratio of sequencing batch reactor SBR is under the condition of 1.3-3.5, adding in sequencing batch reactor SBR with Sodium Propionate is the artificial wastewater of carbon source, then under the condition of anaerobism, anaerobism stirs 30-180 minute, be under the condition of 0.0006-0.0026m/s again at superficial gas velocity, aerobic reaction 120-360 minute, then sedimentation, draining, namely the structure of the Biological Phosphorus Removal System coexisted based on particle-flco is completed,
The process of described sedimentation is as follows:
At first 10 days that sequencing batch reactor SBR runs, sedimentation time was 40 minutes, after running 10 days, sedimentation time is 30 minutes, and after running 15 days, sedimentation time is 25 minutes, run after 20 days, sedimentation time is 20 minutes, and operation sedimentation time is after this 20 minutes;
Described take Sodium Propionate as the COD of the artificial wastewater of carbon source is 350-600mg/L, PO
4 3--P concentration is 8.0-12mg/L.
Therefore the present invention is based on granule sludge and floc sludge feature separately, construct the Biological Phosphorus Removal System that particle and flco coexist, take into account the advantage of particle and flco, avoid its shortcoming separately under Individual existence state, Biological Phosphorus Removal System is run more stable, phosphor-removing effect is excellent, and sludge settling property is good.Be the sbr reactor device of 1.5-3.5 at aspect ratio in the present invention, by the sedimentation time of the operation of gradient reduction SBR, construct the biological phosphate-eliminating system that particle-flco coexists, in system, the settling property of mud is good, contaminant-removal properties is good, system run all right, avoids the problem existing for system of floc sludge and granule sludge Individual existence, is conducive to the steady running maintaining Biological Phosphorus Removal System.
The Biological Phosphorus Removal Granular Sludge system that the inventive method cultivates out all can keep the steady state of particle in the working time of 6 months, and good dephosphorization ability and sludge settling property.
The Biological Phosphorus Removal System construction process method that particle-flco provided by the invention coexists, runs particle after 50 days and accounts for the ratio of total sludge quantity at 47%-67%, sludge volume index at the clearance of 35-56mL/g, COD more than 90%, PO
4 3-the clearance of-P is more than 95%.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the Biological Phosphorus Removal System construction process that present embodiment coexists based on particle-flco is as follows:
Second pond mud is inoculated in sequencing batch reactor SBR, the concentration of seed sludge is 2000-4000mg/L, be 10-25 DEG C in temperature of reaction, the volume exchange rate of sequencing batch reactor SBR is 50%, the aspect ratio of sequencing batch reactor SBR is under the condition of 1.3-3.5, adding in sequencing batch reactor SBR with Sodium Propionate is the artificial wastewater of carbon source, then under the condition of anaerobism, anaerobism stirs 30-180 minute, be under the condition of 0.0006-0.0026m/s again at superficial gas velocity, aerobic reaction 120-360 minute, then sedimentation, draining, namely the structure of the Biological Phosphorus Removal System coexisted based on particle-flco is completed,
The process of described sedimentation is as follows:
At first 10 days that sequencing batch reactor SBR runs, sedimentation time was 40 minutes, after running 10 days, sedimentation time is 30 minutes, and after running 15 days, sedimentation time is 25 minutes, run after 20 days, sedimentation time is 20 minutes, and operation sedimentation time is after this 20 minutes;
Described take Sodium Propionate as the COD of the artificial wastewater of carbon source is 350-600mg/L, PO
4 3--P concentration is 8.0-12mg/L.
Embodiment two: present embodiment and embodiment one are 1.5-3 unlike the aspect ratio of described sequencing batch reactor SBR.Other is identical with embodiment one.
Embodiment three: one of present embodiment and embodiment one or two are 1.8-2.5 unlike the aspect ratio of described sequencing batch reactor SBR.Other is identical with one of embodiment one or two.
Embodiment four: one of present embodiment and embodiment one to three are 2 unlike the aspect ratio of described sequencing batch reactor SBR.Other is identical with one of embodiment one to three.
Embodiment five: one of present embodiment and embodiment one to four are 2300-3900mg/L unlike the concentration of described seed sludge.Other is identical with one of embodiment one to four.
Embodiment six: one of present embodiment and embodiment one to five are 3000mg/L unlike the concentration of described seed sludge.Other is identical with one of embodiment one to five.
Embodiment seven: one of present embodiment and embodiment one to six stir 80 minutes unlike anaerobism under the condition of anaerobism.Other is identical with one of embodiment one to six.
Embodiment eight: one of present embodiment and embodiment one to seven unlike at superficial gas velocity be 0.0008-0.0020m/s condition under aerobic reaction.Other is identical with one of embodiment one to seven.
Embodiment nine: one of present embodiment and embodiment one to eight unlike at superficial gas velocity be 0.001m/s condition under aerobic reaction.Other is identical with one of embodiment one to eight.
Embodiment ten: one of present embodiment and embodiment one to nine were unlike aerobic reaction 200 minutes.Other is identical with one of embodiment one to nine.
Adopt following experimental verification effect of the present invention:
Experiment one:
The Biological Phosphorus Removal System construction process coexisted based on particle-flco is as follows:
To sequencing batch reactor SBR (Plexiglas cylinder, high 40cm, diameter 15cm, useful volume 6L) the middle second pond mud inoculating sewage work, the concentration of seed sludge is 2500mg/L (mud median size 85 μm), sewage pumps into in sequencing batch reactor SBR by intake pump, flooding time each cycle 5 minutes, after having intake, turn on agitator makes muddy water fully mix, and obtains mud mixture, microorganism carries out anaerobic biochemical reaction, anaerobic reaction 85 minutes, after this opens air compressor pump, and controlling aeration rate through gas meter is 0.12m
3h
-1, gas carries out oxygenation through the micro porous aeration head be located at bottom SBR to mud mixture, and microorganism carries out aerobic biochemical and reacts 210 minutes.After aeration terminates, mud enters the quiet heavy stage, sedimentation time run first 10 days, sedimentation time is 40 minutes, after running 10 days, sedimentation time is 30 minutes, after running 15 days, sedimentation time is 25 minutes, runs after 20 days, sedimentation time is 20 minutes, and operation sedimentation time is after this 20 minutes;
Mud-water separation after precipitation, the solution in water port discharges reactor by magnetic valve, draining 3 minutes, and water displacement accounts for 50% of total mixing liquid measure.Water temperature in reaction process is realized by heating rod, and water temperature controls in 23 (± 2) DEG C.Each program run through timer to control.Above step water inlet-draining is pressing cycle repeatable operation in sequencing batch reactor SBR, and each cycle 6 hours, runs 4 cycles every day.
Described sewage take Sodium Propionate as the synthesis of carbon source, and wherein COD concentration is 584mg/L
-1, PO
4 3-the concentration of-P is 10mg/L
-1, NH
4 +-N concentration is 30mg/L
-1.CH
3CH
2COONa 550mg/L
-1，NH
4Cl 111.5mg/L
-1，K
2HPO
443.87mg/L
-1，CaCl
228.5mg/L
-1，MgSO
4·7H
2O 80mg/L
-1，FeCl
3·7H
2O 1.5mg/L
-1，H
3BO
30.15mg/L
-1，CuSO
4·5H
2O 0.03mg/L
-1，KI 1.18mg/L
-1，MnCl
2·4H
2O0.12mg/L
-1，Na
2MoO
4·2H
2O 0.06mg/L
-1，ZnSO
4·7H
2O 0.12mg/L
-1，CoCl
2·7H
2O 0.15mg/L
-1，EDTA 10mg/L
-1。
To the 1-10 days that sequencing batch reactor SBR starts, setting sedimentation time is 40 minutes: when reactor runs to the 3rd day, and in mud, just the small-particle of adularescent occurs, mud median size is still about 85-90 μm, and sludge concentration is 3300mgL
-1, settling character SVI is 75mLg
-1.
To the 10th day that sequencing batch reactor SBR starts, shortening sedimentation time is 30 minutes: along with the continuation of reactor runs, granule sludge becomes large gradually, increase, the 25th day time, mud median size is about 175 μm, and sludge concentration is 4500mg/L, SVI is 56mL/g, system is the state that particle and flco coexist, and wherein particle accounts for the ratio of total sludge quantity is 31%.
To the 20th day that sequencing batch reactor SBR starts, shortening sedimentation time was 25 minutes: when operation 27 days, mud median size can reach 350 μm, and be the mixing system of floc sludge and granule sludge, sludge concentration reaches 6300mg/L, and SVI value is 40mL/g.
To the 30th day that sequencing batch reactor SBR starts, shortening sedimentation time was 20 minutes, and after this by this sedimentation time continuous service, when operation the 150th day, in system, the median size of mud was 553 μm, and the ratio that particle accounts for mud total amount is 67%.System is to COD, PO
4 3-the average removal rate of-P is respectively 90%, and 98%.
The Biological Phosphorus Removal Granular Sludge system that the inventive method cultivates out all can keep the steady state of particle in the working time of 6 months, and good dephosphorization ability and sludge settling property, and does not have excess sludge to produce.
Experiment two:
The Biological Phosphorus Removal System construction process coexisted based on particle-flco is as follows:
The cultivation of granule sludge is carried out in 2L beaker, openingly in the middle part of beaker carries out draining, beaker height 195mm, diameter 130mm, useful volume 2L.
By second pond sludge seeding in beaker, the concentration of seed sludge is 3500mg/L, sewage is poured in beaker, flooding time each cycle 5 minutes, after having intake, stirs and muddy water is fully mixed, obtain mud mixture, microorganism carries out anaerobic biochemical reaction, anaerobic reaction 35 minutes, and control aeration rate is 0.12m
3h
-1carry out oxygenation to mud mixture, microorganism carries out aerobic biochemical and reacts 130 minutes.After aeration terminates, mud enters the quiet heavy stage, sedimentation time run first 10 days, sedimentation time is 40 minutes, after running 10 days, sedimentation time is 30 minutes, after running 15 days, sedimentation time is 25 minutes, runs after 20 days, sedimentation time is 20 minutes, and operation sedimentation time is after this 20 minutes; Mud-water separation after precipitation, the solution in water port is discharged, draining 3 minutes, and water displacement accounts for 50% of total mixing liquid measure.Reaction process water temperature controls at 10 DEG C.Above step water inlet-draining is by cycle repeatable operation in beaker, and each cycle 4 hours, runs 6 cycles every day.
Described sewage take Sodium Propionate as the synthesis of carbon source, and wherein COD concentration is 400mg/L
-1, PO
4 3-the concentration of-P is 8.0mg/L, NH
4 +-N concentration is 20mg/L.CH
3CH
2COONa 370mg/L，NH
4Cl 76.43mg/L，K
2HPO
434.64mg/L，CaCl
228.5mg/L，MgSO
4·7H
2O 80mg/L，FeCl
3·7H
2O 1.5mg/L，H
3BO
30.15mg/L，CuSO
4·5H
2O 0.03mg/L，KI 1.18mg/L，MnCl
2·4H
2O 0.12mg/L，Na
2MoO
4·2H
2O0.06mg/L，ZnSO
4·7H
2O 0.12mg/L，CoCl
2·7H
2O 0.15mg/L，EDTA 10mg/L。
Observe indistinctly adularescent small-particle existence in discovery system when running the 7th day, now mud particle diameter is 110-120 μm, and sludge concentration is 3500mg/L, SVI is 83mL/g
1, main based on flco in system.
When operation 20 days, mud particle diameter median size can reach 230 μm, and be the mixing system of obvious floc sludge and granule sludge, sludge concentration reaches 4300mg/L, and SVI value is 45mLg
-1, the ratio that particle accounts for total sludge quantity is 22%.
When operation the 30th day, the median size of mud was 323 μm, and in system, the ratio of particle increases (43%) to some extent, and sludge concentration is 5000mg/L.
Operation the 90th day, the median size of mud was 580 μm, and in system, the shared ratio of particle is 67%, and sludge concentration is 6500mg/L, SVI value is 56mL/g.The clearance of COD is 93%, PO
4 3-the clearance of-P is 97%.
The Biological Phosphorus Removal System construction process method that the particle-flco of this experiment coexists is simple, and do not need the SBR of particular configuration, can realize at the temperature of 10 DEG C, system phosphorus removal property is good, stable.
Claims (10)
1., based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the Biological Phosphorus Removal System construction process coexisted based on particle-flco is as follows:
Second pond mud is inoculated in sequencing batch reactor SBR, the concentration of seed sludge is 2000-4000mg/L, be 10-25 DEG C in temperature of reaction, the volume exchange rate of sequencing batch reactor SBR is 50%, the aspect ratio of sequencing batch reactor SBR is under the condition of 1.3-3.5, adding in sequencing batch reactor SBR with Sodium Propionate is the artificial wastewater of carbon source, then under the condition of anaerobism, anaerobism stirs 30-180 minute, be under the condition of 0.0006-0.0026m/s again at superficial gas velocity, aerobic reaction 120-360 minute, then sedimentation, draining, namely the structure of the Biological Phosphorus Removal System coexisted based on particle-flco is completed,
The process of described sedimentation is as follows:
At first 10 days that sequencing batch reactor SBR runs, sedimentation time was 40 minutes, after running 10 days, sedimentation time is 30 minutes, and after running 15 days, sedimentation time is 25 minutes, run after 20 days, sedimentation time is 20 minutes, and operation sedimentation time is after this 20 minutes;
Described take Sodium Propionate as the COD of the artificial wastewater of carbon source is 350-600mg/L, PO
4 3--P concentration is 8.0-12mg/L.
2., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the aspect ratio of described sequencing batch reactor SBR is 1.5-3.
3., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the aspect ratio of described sequencing batch reactor SBR is 1.8-2.5.
4., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the aspect ratio of described sequencing batch reactor SBR is 2.
5., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the concentration of described seed sludge is 2300-3900mg/L.
6., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that the concentration of described seed sludge is 3000mg/L.
7., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that anaerobism stirs 80 minutes under the condition of anaerobism.
8., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that aerobic reaction under superficial gas velocity is the condition of 0.0008-0.0020m/s.
9., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that aerobic reaction under superficial gas velocity is the condition of 0.001m/s.
10., according to claim 1 based on the Biological Phosphorus Removal System construction process that particle-flco coexists, it is characterized in that aerobic reaction 200 minutes.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790373A (en) * | 2019-10-09 | 2020-02-14 | 天津大学 | Method for establishing enhanced biological phosphorus removal system |
| CN112661257A (en) * | 2020-11-25 | 2021-04-16 | 天津城建大学 | Culture method of biological phosphorus removal granular sludge at low temperature |
| CN113184985A (en) * | 2021-05-19 | 2021-07-30 | 西南交通大学 | Method for promoting stable operation of aerobic granular sludge |
| CN114180718A (en) * | 2021-12-19 | 2022-03-15 | 扬州大学 | Culture method of biological phosphorus removal granular sludge |
| CN115353201A (en) * | 2022-07-25 | 2022-11-18 | 上海交通大学 | Municipal sewage treatment system based on aerobic granular sludge treatment technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790373A (en) * | 2019-10-09 | 2020-02-14 | 天津大学 | Method for establishing enhanced biological phosphorus removal system |
| CN112661257A (en) * | 2020-11-25 | 2021-04-16 | 天津城建大学 | Culture method of biological phosphorus removal granular sludge at low temperature |
| CN113184985A (en) * | 2021-05-19 | 2021-07-30 | 西南交通大学 | Method for promoting stable operation of aerobic granular sludge |
| CN113184985B (en) * | 2021-05-19 | 2022-07-12 | 西南交通大学 | Method for promoting stable operation of aerobic granular sludge |
| CN114180718A (en) * | 2021-12-19 | 2022-03-15 | 扬州大学 | Culture method of biological phosphorus removal granular sludge |
| CN115353201A (en) * | 2022-07-25 | 2022-11-18 | 上海交通大学 | Municipal sewage treatment system based on aerobic granular sludge treatment technology |
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Application publication date: 20150610 |