CN109319924A - A kind of devices and methods therefor for strengthening aerobic sludge granulation process - Google Patents
A kind of devices and methods therefor for strengthening aerobic sludge granulation process Download PDFInfo
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- CN109319924A CN109319924A CN201811297386.1A CN201811297386A CN109319924A CN 109319924 A CN109319924 A CN 109319924A CN 201811297386 A CN201811297386 A CN 201811297386A CN 109319924 A CN109319924 A CN 109319924A
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- reactor
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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
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- C02F3/005—Combined electrochemical biological 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/48—Devices for applying magnetic or electric fields
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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
The invention discloses a kind of devices and methods therefors for strengthening aerobic sludge granulation process; described device includes inlet unit, reactor, aeration unit and water unit; wherein: the inlet unit includes inlet tank and water inlet peristaltic pump, and the outlet pipe for peristaltic pump of intaking and the water inlet of reactor bottom connect；The inner wall of the reactor is equipped with inertia Ti cathode, and the center of inside of reactor is equipped with active iron anode, and the end of inertia Ti cathode and active iron anode passes through conducting wire and connect with D.C. regulated power supply；The aeration unit includes the air pump being sequentially connected, spinner flowmeter and sand filtration aeration head, and sand filtration aeration head is set to the bottom of reactor；The water unit includes water tank and coupled water outlet solenoid valve, and water outlet solenoid valve is connect by outlet pipe with the water outlet being set in the middle part of reactor.The quick particle of aerobic sludge and the operation steady in a long-term of aerobic particle mud system can be achieved at the same time in the present invention.
Description
Technical field
The invention belongs to technical field of biological treatment of wastewater, be related to a kind of device for strengthening aerobic sludge granulation process and
Its method.
Background technique
Aerobic particle mud is microorganism under the drivings of various selection pressures, adhered to each other between microorganism, autoflocculation and by
The bio aggregate of the compact structure gradually formed has apparent advantage based on this Aerobic Granular Sludge Technology to grow up,
Such as: reply pollutant kind is wide, it is good to support strong shock resistance, sludge settling property and treatment facility land occupation is few etc..From previous generation
Record the aerobic particle mud nineties be found so far, domestic and foreign scholars to its physicochemical property, microbiologic population, Mass Transfer Model with
And formation mechenism etc. has carried out numerous studies, and DHV company of Holland withTechnique is as technical brand in lotus
More than 30 seat aerobic particle mud sewage treatment projects are established on the ground such as orchid, Spain, Brazil, South Africa, which can effectively reduce dirt
Water factory's occupied area significantly reduces energy consumption, is new and effective, the promising dirty water living creature processing technique of tool.
However, Aerobic Granular Sludge Technology is when coping with underload town domestic sewage at present, generally existing granulating week
Phase is long, the easy unstability of longtime running this two large problems, restricts the extensive use of the technology in the world.In addition, some energy
The reactor of enough quick particles also can gradually appear granule sludge disintegration with the extension of runing time.One of reason
It is the resistance to mass tranfer that the biggish partial size of aerobic particle mud can increase oxygen and nutriment etc., causes to be formed inside particle certain
Anaerobism space, longtime running will weaken grain structure because of bacterium endogenous respiration.
Therefore, optimize aerobic sludge granulation process, the structural strength of raising granule sludge has the development of the technology
Significance.
Summary of the invention
In order to solve the problems such as prior art generally existing granulating period is long, longtime running easy unstability, the present invention is mentioned
A kind of devices and methods therefor for strengthening aerobic sludge granulation process is supplied.Quick of aerobic sludge can be achieved at the same time in the present invention
The operation steady in a long-term of granulation and aerobic particle mud system, the aerobic particle mud partial size of culture is big, settling velocity is fast, intensity is high,
Stable structure, flora are abundant.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of device for strengthening aerobic sludge granulation process, including inlet unit, reactor, aeration unit and water outlet are single
Member, in which:
The inlet unit includes inlet tank and the water inlet peristaltic pump for controlling flow of inlet water and time, peristaltic pump of intaking
Outlet pipe and reactor bottom water inlet connect；
The reactor is sequence batch batch reactor, and the inner wall of reactor is equipped with inertia Ti cathode, the inside of reactor
Center is equipped with active iron anode, and the end of inertia Ti cathode and active iron anode passes through conducting wire and connect with D.C. regulated power supply；
The aeration unit includes the air pump being sequentially connected, spinner flowmeter and sand filtration aeration head, and sand filtration aeration head is set
It is placed in the bottom of reactor；
The water unit includes water tank and coupled for controlling the water outlet solenoid valve of water discharging time, out water power
Magnet valve is connect by outlet pipe with the water outlet being set in the middle part of reactor.
A method of strengthening aerobic sludge granulation process using above-mentioned apparatus, includes the following steps:
Step 1: water inlet water source arrangement step: simulating town domestic sewage in the human configuration water source that intakes, in which: COD is
300~800mg/L, NH4+- N is 40~80mg/L, and TP is 8~1510mg/L；
Step 2: inoculation process: the floc sludge after inoculation domestication in the reactor makes the MLSS originated in reactor
3~6g/L；
Step 3: aerobic sludge granulation process: reactor uses SBR process operation, and the cycle of operation is 4~6h, is divided into
Water inlet, aeration, precipitating and draining four-stage, in which: the sedimentation time is 5~20min, and aeration time is 210~225min；It is whole
Constant voltage DC electricity is continuously applied during a SBR process operation in aerobic particle mud system, is periodically arranged after system run all right
Excess sludge out.
Compared with the prior art, the present invention has the advantage that
1, experimental provision of the invention can turn out the aerobic particle mud that average grain diameter is greater than 0.2mm, sludge in 20d
Settling property is good, biomass is high, can assign the higher contaminant removal efficiency of reactor and prolonged stable operation, wherein
The removal rate of COD, TN and TP are respectively maintained at 97%, 68% and 80%.
2, faint uniform electric field can be formed after inertia Ti cathode and active iron anodal closure, the item existing for built-in electric field
Synergistic effect of both being generated under part, first is that weak electric field can stimulate microorganism secretion more by enhancing membrane permeability
Play the Extracellular polymers of glue connection, second is that weak electric field can promote active iron Anodic Stripping iron ion and with Extracellular polymers phase network
It closes.Under conditions of Extracellular polymers are detained metal cation and microbial biochemical releases phosphorus and improves pH, aerobic sludge quick
Granulation, and will form and accumulate inorganic mineral deposits inside mature granular sludge, this is to aerobic particle mud system
Quick start and stable operation have very important realistic meaning.
3, experimental provision structure of the invention is simple, and operation is simple, cheap and significant effect.
4, the aerobic particle mud cultivated of the present invention is yellowish-brown spheric granules, average grain diameter 1.2-1.3mm, and partial size is in
Normal distribution ensures aerobic particle mud structure there are the mass transfer duct of minerals core and crosslinking intercommunication inside particle
Steadily in the long term；Meanwhile the functions such as fixed nitrogen vibrio (Azoarcus) and pottery Oerskovia (Thauera) are enriched in granule sludge
Flora.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of reinforcing aerobic sludge granulation process of the invention, in figure: 1- inlet tank,
2- water inlet peristaltic pump, 3- reactor, 4- water outlet solenoid valve, 5- water tank, 6- air pump, 7- spinner flowmeter, 8- sand filtration aeration
Head, 9- control unit, 10- D.C. regulated power supply, 11- activity iron anode, 12- inertia Ti cathode.
Fig. 2 is the particle diameter distribution feelings of reactor aerobic particle mud during whole service in specific embodiment three
Condition.
Fig. 3 is the situation of change of reactor contaminant-removal properties during whole service in specific embodiment three.
Fig. 4 is the shape appearance figure of the aerobic particle mud of 100d in specific embodiment three, wherein (a) is that aerobic grain is dirty
The optical microscope of mud is (b) the low power scanning electron microscope (SEM) photograph of aerobic particle mud, (c) sweeps for the high power of aerobic particle mud
Retouch electron microscope.
Fig. 5 is the X-ray diffractogram of the aerobic particle mud of 100d in specific embodiment three.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawing, and however, it is not limited to this, all to this
Inventive technique scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered
Within the protection scope of the present invention.
Specific embodiment 1: as shown in Figure 1, the device for the reinforcing aerobic sludge granulation process that present embodiment provides
Including inlet unit, reactor 3, aeration unit, water unit and control unit 9, in which:
The inlet unit includes inlet tank 1 and the water inlet peristaltic pump 2 for controlling flow of inlet water and time, and water inlet is wriggled
The outlet pipe of pump 2 is connect with the water inlet of 3 bottom of reactor；
The main body of the reactor 3 is cylindrical sequence batch batch reactor, and inertia titanium yin is equipped on the inside of barrel
Pole 12, cylinder center are equipped with active iron anode 11, by the end extraction wire of 11 liang of electrodes of inertia Ti cathode 12 and active iron anode
It is connected with D.C. regulated power supply 10；
The aeration unit includes the air pump 6 being sequentially connected, spinner flowmeter 7 and sand filtration aeration head 8, sand filtration aeration head
8 are set to the bottom of reactor 3；
The water unit includes water tank 5 and the coupled water outlet solenoid valve 4 for being used to control water discharging time, water outlet
Solenoid valve 4 is connect by outlet pipe with the water outlet for being set to 3 middle part of reactor；
Described control unit 9 is used for having to the operating conditions such as the water inlet of reactor 3, aeration, precipitating, water outlet and electric field
Without being controlled, it is separately connected with water inlet peristaltic pump 2, water outlet solenoid valve 4, air pump 6 and D.C. regulated power supply 10.
For weak electric field application system, from D.C. regulated power supply 10 via active iron anode 11 and inertia Ti cathode 12 to anti-
Answer the direct current of device some strength without interruption.
In present embodiment, the plexiglass cylinder that the reactor 3 is 1.6L for a dischargeable capacity, the high 70cm of cylinder,
Internal diameter 6cm.
In present embodiment, the inertia Ti cathode 12 is the titanium silk that a diameter is 3mm, is wound on the inside of barrel,
Screw diameter is 54mm, helical length 70cm.
In present embodiment, the activity iron anode is the iron wire that a diameter is 3mm, is perpendicularly fixed at cylinder center,
Height is 70cm.
In present embodiment, the side wall of the reactor is spaced the multiple sample taps of setting from top to bottom, wherein being located at bottom
Sample tap can be used for that excess sludge is discharged.
Specific embodiment 2: utilizing the reinforcing of one described device of specific embodiment aerobic present embodiments provide for a kind of
The method of Granulation of Sludge, described method includes following steps:
Step 1: water inlet water source arrangement step: simulating town domestic sewage in the human configuration water source that intakes, in which: COD is
300~800mg/L, NH4+- N is 40~80mg/L, and TP is 8~1510mg/L；
Step 2: inoculation process: the floc sludge after inoculation domestication in the reactor makes the MLSS originated in reactor
3~6g/L；
Step 3: aerobic sludge granulation process: reactor uses SBR process operation, and the cycle of operation is 4~6h, is divided into
Water inlet, aeration, precipitating and draining four-stage, in which: the sedimentation time is 5~20min, and aeration time is 210~225min；It is whole
Constant voltage DC electricity is continuously applied during a SBR process operation in aerobic particle mud system, is periodically arranged after system run all right
Excess sludge out.
In present embodiment, in water inlet water source arrangement step, into water inlet be added 0.5mM calcium ions and magnesium ions and
The trace element solution of 1mL/L wherein contains FeCl in 1L trace element solution3·6H2O:1.5g；H3BO3: 0.15g；
CuSO4·5H2O:0.03g；KI:0.18g；MnCl2·4H2O:0.12g；Na2MoO4·2H2O:0.06g；ZnSO4·7H2O:
0.12g；CoCl2·6H2O:0.15g；EDTA:0.04g.
In present embodiment, in the inoculation process, people first is added in the activated sludge for being derived from secondary sedimentation tank of sewage treatment work
2~5d of bored exposure in the sanitary sewage of work configuration, then the floc sludge after a certain amount of domestication is taken to be added in reactor, make reactor
The MLSS of interior starting is 3~6g/L.
In present embodiment, in the aerobic sludge granulation process, to aerobic grain during entire SBR process operation
Sludge system continuously applies the constant voltage DC electricity of 0.8~1.5V.
In present embodiment, in the aerobic sludge granulation process, the gas flow of aeration phase is 2~3L/min,
It is 35~50% that the draining of bleeding stage, which is compared,.
In present embodiment, in the aerobic sludge granulation process, after system run all right, periodically in aeration phase
Excess sludge is discharged before terminating, to maintain sludge retention time SRT for 15~25d.
Specific embodiment 3: present embodiments provide for a kind of method for strengthening aerobic sludge granulation process, it is described
Method specific implementation step is as follows:
(1) water inlet water source is prepared
Water source intake as the simulation town domestic sewage of laboratory human configuration, wherein COD is 600mg/L, NH4+- N is
60mg/L, TP 10mg/L, pH 6.5.In addition, the calcium ions and magnesium ions of 0.5mM and the micro member of 1mL/L is added into water inlet again
Plain solution.Wherein contain in 1L trace element solution: FeCl3·6H2O, 1.5g；H3BO3, 0.15g；CuSO4·5H2O, 0.03g；
KI, 0.18g；MnCl2·4H2O, 0.12g；Na2MoO4·2H2O, 0.06g；ZnSO4·7H2O, 0.12g；CoCl2·6H2O,
0.15g；EDTA, 0.04g.
(2) it is inoculated with floc sludge
Floc sludge after being inoculated with a certain amount of domestication in the apparatus of the present makes the MLSS originated in reactor 3
3.6g/L.Before inoculation, the activated sludge for being derived from secondary sedimentation tank of sewage treatment work is added to the bored exposure 2d of sanitary sewage for stating human configuration,
Complete sludge acclimatization.
(3) aerobic particle mud culture and stable operation
Under the control of control unit 9, reactor 3 is run according to the sequence of water inlet, aeration, precipitating and draining, and by straight
Stream regulated power supply 10 continuously applies the constant pressure electric field of 1.0V in aerobic particle mud system, and electric current is about 2~13mA；The cycle of operation
For 4h, wherein the sedimentation time is 5~20min, and aeration time is 210~225min；Aeration phase provides gas by sand filtration aeration head 8
Body flow is 2L/min, and it is 37.5% that the draining of bleeding stage, which is compared,；After 60d system run all right, periodically terminate in aeration phase
Preceding discharge excess sludge, to maintain sludge retention time SRT for 20d.
As shown in Fig. 2, the floc sludge average grain diameter of inoculation is 0.09mm, the partial size of sludge is just greater than 0.2mm in 20d,
Granularity maintains to stablize after 60d, average grain diameter 1.2-1.3mm, is in normal distribution.Fig. 3 shows with granulating
The progress of process, reactor effluent quality index tend towards stability, and have excellent contaminant degradation performance, COD, TN and TP's
Removal rate is respectively maintained at 97%, 68% and 80%.Wherein, the propagation process of the variation tendency of TP removal rate and grain diameter has
There is certain similitude, the structure of the raising and mature granular sludge that show TP removal rate is closely related.
Fig. 4 and Fig. 5 collectively show that, the aerobic particle mud cultivated in present embodiment is yellowish-brown spheric granules, average
Partial size is 1.2~1.3mm, and there are the mass transfer ducts of minerals core and crosslinking intercommunication inside particle.With with anaerobism core
Aerobic particle mud is compared, and the aerobic particle mud structure in present embodiment is more excellent, and intensity is big and is not easy to disintegrate, this is right
Aerobic particle mud system has very important realistic meaning steadily in the long term.
Claims (10)
1. it is a kind of strengthen aerobic sludge granulation process device, it is characterised in that described device include inlet unit, reactor,
Aeration unit and water unit, in which:
The inlet unit includes inlet tank and the water inlet peristaltic pump for controlling flow of inlet water and time, and peristaltic pump of intaking goes out
The connection of the water inlet of water pipe and reactor bottom；
The reactor is sequence batch batch reactor, and the inner wall of reactor is equipped with inertia Ti cathode, the center of inside of reactor
Equipped with active iron anode, the end of inertia Ti cathode and active iron anode is connect by conducting wire with D.C. regulated power supply；
The aeration unit includes the air pump being sequentially connected, spinner flowmeter and sand filtration aeration head, and sand filtration aeration head is set to
The bottom of reactor；
The water unit includes water tank and the coupled water outlet solenoid valve for being used to control water discharging time, water outlet solenoid valve
It is connect by outlet pipe with the water outlet being set in the middle part of reactor.
2. the device according to claim 1 for strengthening aerobic sludge granulation process, it is characterised in that described device is also wrapped
Control unit is included, control unit is connect with water inlet peristaltic pump, water outlet solenoid valve, air pump and D.C. regulated power supply respectively.
3. the device according to claim 1 for strengthening aerobic sludge granulation process, it is characterised in that the reactor is
The plexiglass cylinder that one dischargeable capacity is 1.6L, cylinder high 70cm, internal diameter 6cm；The inertia Ti cathode is that a diameter is
The titanium silk of 3mm is wound on the inside of barrel, screw diameter 54mm, helical length 70cm；The activity iron anode is one
Diameter is the iron wire of 3mm, is perpendicularly fixed at cylinder center, is highly 70cm.
4. the device according to claim 1 for strengthening aerobic sludge granulation process, it is characterised in that the reactor
Side wall is spaced the multiple sample taps of setting from top to bottom, wherein being located at the sample tap of bottom for excess sludge to be discharged.
5. a kind of method for strengthening aerobic sludge granulation process using claim 1-4 any claim described device,
It is characterized in that described method includes following steps:
Step 1: water inlet water source arrangement step: human configuration intake water source simulate town domestic sewage, in which: COD be 300~
800mg/L, NH4+- N is 40~80mg/L, and TP is 8~15mg/L；
Step 2: inoculation process: the floc sludge after inoculation domestication in the reactor, make the MLSS 3 originated in reactor~
6g/L；
Step 3: aerobic sludge granulation process: reactor use SBR process operation, the cycle of operation be 4~6h, be divided into water,
Aeration, precipitating and draining four-stage, in which: the sedimentation time is 5~20min, and aeration time is 210~225min；Entire SBR
Constant voltage DC electricity is continuously applied during process operation in aerobic particle mud system, periodically discharge is remaining after system run all right
Sludge.
6. the method according to claim 5 for strengthening aerobic sludge granulation process, it is characterised in that the water inlet water source
In arrangement step, the calcium ions and magnesium ions of 0.5mM and the trace element solution of 1mL/L are added into water inlet.
7. the method according to claim 6 for strengthening aerobic sludge granulation process, it is characterised in that 1L microelement is molten
Contain FeCl in liquid3·6H2O:1.5g；H3BO3: 0.15g；CuSO4·5H2O:0.03g；KI:0.18g；MnCl2·4H2O:
0.12g；Na2MoO4·2H2O:0.06g；ZnSO4·7H2O:0.12g；CoCl2·6H2O:0.15g；EDTA:0.04g.
8. the method according to claim 5 for strengthening aerobic sludge granulation process, it is characterised in that the inoculation process
In, 2~5d of bored exposure in the sanitary sewage of human configuration first is added in the activated sludge for being derived from secondary sedimentation tank of sewage treatment work, then take one
Floc sludge after quantitative domestication is added in reactor, makes the 3~6g/L of MLSS originated in reactor.
9. the method according to claim 5 for strengthening aerobic sludge granulation process, it is characterised in that the aerobic sludge
It granulates in process, continuously applies the constant voltage DC of 0.8~1.5V during entire SBR process operation to aerobic particle mud system
Electricity.
10. the method according to claim 5 for strengthening aerobic sludge granulation process, it is characterised in that the aerobic sludge
It granulates in process, the gas flow of aeration phase is 2~3L/min, and it is 35~50% that the draining of bleeding stage, which is compared, works as system
After stable, excess sludge is discharged before aeration phase terminates periodically to maintain sludge retention time SRT for 15~25d.
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| CN110330099A (en) * | 2019-08-14 | 2019-10-15 | 重庆市生态环境科学研究院 | A kind of method for culturing aerobic granular sludge and culture apparatus |
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