CN109179654A - It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines - Google Patents
It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines Download PDFInfo
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- CN109179654A CN109179654A CN201811037998.7A CN201811037998A CN109179654A CN 109179654 A CN109179654 A CN 109179654A CN 201811037998 A CN201811037998 A CN 201811037998A CN 109179654 A CN109179654 A CN 109179654A
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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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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- Hydrology & Water Resources (AREA)
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Abstract
SNAD technique quick start method in the aerobic membrane bioreactor that declines is flowed up the invention discloses a kind of, it declines in aerobic membrane bioreactor in up-flow, using low C/N than waste water as influent quality, initial start stage uses the method for operation of high sludge concentration 16.0g/L and low sludge loading 0.064kgCOD/kgSS.d, it is main to adjust DO by taking, temperature, the modes such as basicity are discharged the ratio between ammonia nitrogen and nitrite nitrogen in a certain range to control, and nitrogen load and carbon load are improved by shortening stop mode in time, quick start SNAD technique, realize that anaerobic ammonium oxidation granular coexists with floc sludge.There is the system high efficiency synchronous decarburization to denitrogenate removal effect, COD, NH4 +- N, TN removal rate be respectively 89%, 96%, 86%, occupied area is small, and easy to operate, low energy consumption.
Description
Technical field
It is the invention belongs to technical field of sewage, in particular to a kind of to decline aerobic membrane bioreactor medium or short range in up-flow
Nitration denitrification-Anammox (abbreviation SNAD) technique quick start method, can quick start short-cut nitrification and denitrification-detest
Anaerobic ammonium oxidation technique is suitble to low C/N to compare wastewater treatment.
Background technique
SNAD technique refers to short distance nitration, short-cut denitrification and the simultaneous novel biological dinitrification skill of Anammox
Art has the characteristics that low energy consumption, carbon source demand amount is small, sludge yield is low, occupied area is small, efficient decarburization is denitrogenated, and is suitable for C/N
Lower industrial wastewater or municipal wastewater.But since the anaerobic ammonia oxidizing bacteria generation cycle is long in SNAD system, to temperature, basicity etc.
Growth conditions require it is harsh, how quick start be always current urgent need to resolve problem, limit SNAD technique in engineering
Practical application.
Summary of the invention
The present invention is long for the SNAD technique starting period and unstable problem, provides a kind of up-flow and declines oxygen membrane bioreaction
SNAD technique quick start method in device is answered, by controlling dissolved oxygen concentration, water outlet NH in incubation4 +- N and NO2 -- N is when
The modes such as membrane module retention sludge realize the quick start of SNAD technique.
Technical solution of the present invention is as follows:
It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, which is characterized in that with low C/N ratio
Waste water is as water inlet matrix, and using cotton-shaped activated sludge as seed sludge, SNAD technique start-up course is completed in 98d, including
The stage is tamed in sludge seeding, Anammox flora occurs and Anammox flora concentration improves the stage, realizes that decarburization is denitrogenated
It is synchronous to carry out.
Preferably, the water inlet matrix C/N (< 2:1), influent COD < 400mg/L, NH4 +- N concentration is 200mg/L, pH
Value range is 7.8-8.0, and temperature range is 30 DEG C -35 DEG C, and basicity concentration range is 1400mg/L-1800mg/L.
Preferably, it is 0.3-0.7mg/L that SNAD, which starts dissolved oxygen concentration in overall process,.
Preferably, SNAD starts sludge concentration in overall process and controls in 16.0g/L-18.6g/L.
Preferably, high sludge concentration 16.0g/L and low sludge loading 0.0064kgCOD/ is used at start-up course initial stage
The method of operation of kgSS.d.
Preferably, up-flow declines aerobic membrane bioreactor from bottom continuum micromeehanics, by membrane module and pump intermittent drainage, often
12min is drained, rests 3min.
Preferably, in 1-26d, seed sludge is in domestication cultivation stage, and sludge loading remains 0.064kgCOD/
kgSS.d；Water inlet nitrogen load is 0.8kgNH4 +-N/(m3.d), hydraulic detention time 6h.
Preferably, in 27-60d, Anammox flora occurs, and ammonia nitrogen and nitrous nitrogen concentration ratio are within the scope of 1:1-1:2
Synchronous removal.
Preferably, in 61-98d, Anammox flora concentration improves the stage, sludge loading is promoted to
0.078kgCOD/kgSS.d, hydraulic detention time foreshorten to 5h, and water inlet nitrogen load promotes most 0.96kgNH4 +-N/(m3.d)。
Preferably, anaerobic ammonium oxidation granular coexists with floc sludge after completing SNAD technique start-up course.
The advantages of the present invention are mainly reflected in:
(1) method of operation combined with micro- oxygen up-flow system using film, using low C/N than waste water as matrix of intaking,
Initial start stage uses the service condition of high sludge concentration and low sludge loading, and anaerobic ammonium oxidation granular is formed fastly, and SNAD system opens
The dynamic period is short, realizes anaerobic ammonium oxidation granular and coexists with floc sludge.
(2) the SNAD system cultivated is stablized, COD, NH4 +The removal rate of-N and TN can reach 89%, 96%, 86% respectively；
And know path analysis is denitrogenated, 38% total nitrogen is removed by Anammox, and 62% total nitrogen is removed by denitrification.
(3) simple process, occupied area is small, easy to operate, and less energy consumption is at low cost.
Detailed description of the invention
Fig. 1 is up-flow membrane bioreactor, in which: 1- reactor, 2- intake pump, 3- air pump, 4- water inlet, 5- aeration
Mouth, 6- mud discharging mouth, 7- aeration head, 8- Kynoar (PVDF) hollow-fibre membrane, 9- membrane module, 10-PLC controller, 11- are true
Hollow pressure gauge, 12- water outlet pump, 13- water-bath circulating pump.
Fig. 2 is different phase sludge metamorphosis figure.
Specific embodiment
To make those skilled in the art more fully understand technical solution of the present invention, below with reference to embodiment to the present invention
A kind of up-flow provided the SNAD technique quick start method in aerobic membrane bioreactor that declines is described in detail.Following embodiment
It is merely to illustrate the range of the present invention and is not intended to limit the present invention.
It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, which is characterized in that with low C/N ratio
Waste water is as water inlet matrix, and using cotton-shaped activated sludge as seed sludge, SNAD start-up course, including sludge are completed in 98d
It is inoculated with domestication stage, the appearance of Anammox flora and Anammox flora concentration and improves the stage, realize that synchronization is denitrogenated in decarburization
It carries out.
SNAD starts in overall process, intakes matrix C/N (< 2:1), influent COD < 400mg/L, NH4 +- N concentration is
200mg/L；PH value range is 7.8-8.0, and temperature range is 30 DEG C -35 DEG C, and basicity concentration range is 1400mg/L-1800mg/
L；Dissolved oxygen concentration is 0.3-0.7mg/L；Sludge concentration is controlled in 16.0g/L-18.6g/L.
The fortune of high sludge concentration 16.0g/L and low sludge loading 0.0064kgCOD/kgSS.d are used at start-up course initial stage
Line mode.
Up-flow declines aerobic membrane bioreactor from bottom continuum micromeehanics, passes through membrane module and pump intermittent drainage, every draining
12min, rests 3min.
In 1-26d, seed sludge is in domestication cultivation stage, and sludge loading remains 0.064kgCOD/kgSS.d；Water inlet
Nitrogen load is 0.8kgNH4 +-N/(m3.d), hydraulic detention time 6h.
In 27-60d, Anammox flora occurs, ammonia nitrogen and nitrous nitrogen concentration ratio within the scope of 1:1-1:2 synchronize go
It removes.
In 61-98d, Anammox flora concentration improves the stage, sludge loading is promoted to 0.078kgCOD/
KgSS.d, hydraulic detention time foreshorten to 5h, and water inlet nitrogen load promotes most 0.96kgNH4 +-N/(m3.d)。
After 98d, SNAD technique start-up course is completed, anaerobic ammonium oxidation granular coexists with floc sludge.
Embodiment 1
It is a kind of to flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, it mainly comprises the steps that
(1) inoculation of activated-sludge and device
As shown in fig. 1, the aerobic membrane bioreactor SNAD technique device for rapidly starting that declines is flowed up, reactor 1 is cylinder
Body is equipped with interlayer, internal diameter 0.07m, outer diameter 0.09m, height 1.2m, dischargeable capacity 4L.Kynoar is equipped with inside reactor 1
(PVDF) hollow-fibre membrane 8,0.3 μm of film wire aperture, effective membrane area 0.3m2。
The water inlet pipe connected with the bottom water inlet 4 of reactor 1 is connected with intake pump 2, with 1 bottom aeration opening 5 of reactor
The aeration tube of connection is connected with air pump 3, and the aeration head 7 being connected with aeration opening 5 is the cylindrical titanium aeration head in 5 microns of aperture,
Bottom mud discharging mouth 6 with reactor 1 is for discharging excess sludge.
The membrane module 9 being connected with hollow-fibre membrane 8 is connected with water outlet pump 12 by outlet pipe, in membrane module 9 and water outlet
The PLC device 10 of control interval water outlet program and the pressure vacuum gauge 11 for monitoring transmembrane pressure are equipped among pump 12.
Water-bath circulating pump 13 connects the interlayer of reactor 1, control water-bath circulation by pipeline.
The water inlet of reactor 1 is sent into reactor from the water inlet 4 of 1 bottom of reactor, air inlet pipe and 1 bottom of reactor
Aeration head 7 is connected for being aerated into reactor 1, guarantees the dissolved oxygen concentration in reactor 1, the water outlet of reactor 1 is by going out
Water pipe connection water outlet pump 12 is discharged with hollow-fibre membrane 8 and membrane module 9.
Using Beijing municipal treatment, commonly for cotton-shaped activated sludge as seed sludge, starting sludge concentration is 16g/L.It will
It is inoculated in membrane biological reaction apparatus (Fig. 1), and reactor is cylinder, built-in Kynoar (PVDF) hollow-fibre membrane group
Part has collet to carry out heating water bath outside, keeps temperature of reactor at 30 DEG C -35 DEG C, dissolved oxygen maintains 0.3-0.7mg/L, alkali
Concentration is spent in 1400mg/L-1800mg/L.
(2) water intake mode:
It is water inlet matrix with low C/N (1-2:1) simulated wastewater, sewage is entered instead by the water inlet 4 of reactor bottom
Device is answered, the main composition of sewage is shown in Table 1.
Table 1
(3) forming process
The method of operation of high sludge concentration 16g/L and low sludge loading 0.064kgCOD/kgSS.d are used in initial start stage.
In 1-26d, seed sludge is in domestication cultivation stage, sludge loading 0.064kgCOD/kgSS.d；Nitrogen of intaking is negative
Lotus is 0.8kgNH4 +-N/(m3.d), hydraulic detention time 6h.This stage keeps water outlet ammonia nitrogen and nitrite nitrogen in 40-50mg/L.
In 27-60d, Anammox flora occurs, ammonia nitrogen and nitrous nitrogen concentration ratio within the scope of 1:1-1:2 synchronize go
It removes, ammonia nitrogen is gradually decrease to 30mg/L, and TN removal rate is also improved by 52% to 60%.Anaerobic ammoxidation activity at this time is more micro-
Weak, macroscopic appearance is also unobvious.
In 61-98d, Anammox flora concentration improves the stage, and sludge loading is promoted to 0.078kgCOD/ by this stage
KgSS.d, water inlet nitrogen load promote most 0.96kgNH4 +-N/(m3.d), hydraulic detention time foreshortens to 5h.Hereafter ammonia nitrogen and Asia
The decline of nitrate nitrogen concentration is obvious, and water outlet ammonia nitrogen concentration is down to 7mg/L, and ammonia nitrogen removal frank is stablized 96% or more, nitrogen removal rate
It is improved by 60% to 86%.When Anammox reaction further strengthens, the amount that ammonia nitrogen is utilized by AOB is reduced, and AOB utilizes oxygen
The amount of gas is also reduced accordingly, and aeration quantity further decreases, and anaerobic zone is accordingly increased in system, be discharged the removal rate of COD by
70% improves to 89%, and keeps stable.
Macroscopically, it is apparent that red bacterium granule sludge (see picture 2) is analyzed on microcosmic by high-flux sequence
The variation of flora group and abundance, detect two kinds of Anammox strains be respectively Candidatus Brocadia and
Candidatus Jettenia。
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various types and improvement can be made, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
- The SNAD technique quick start method in aerobic membrane bioreactor 1. a kind of up-flow declines, which is characterized in that useless with low C/N ratio Water is as water inlet matrix, and using cotton-shaped activated sludge as seed sludge, SNAD technique start-up course, including dirt are completed in 98d Mud is inoculated with the domestication stage, Anammox flora occurs and Anammox flora concentration improves the stage, realizes that decarburization is denitrogenated together Step carries out.
- 2. according to claim 1 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, the water inlet matrix C/N (< 2:1), influent COD < 400mg/L, NH4 +- N concentration is 200mg/L, and pH value range is 7.8-8.0, temperature range are 30 DEG C -35 DEG C, and basicity concentration range is 1400mg/L-1800mg/L.
- 3. according to claim 2 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, it is 0.3-0.7mg/L that SNAD, which starts dissolved oxygen concentration in overall process,.
- 4. according to claim 3 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, SNAD starts sludge concentration in overall process and controls in 16.0g/L-18.6g/L.
- 5. according to claim 4 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, the operation of high sludge concentration 16.0g/L and low sludge loading 0.0064kgCOD/kgSS.d is used at start-up course initial stage Mode.
- 6. according to claim 5 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, up-flow declines aerobic membrane bioreactor from bottom continuum micromeehanics, by membrane module and intermittent drainage is pumped, every draining 12min, Rest 3min.
- 7. according to claim 6 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, in 1-26d, seed sludge is in domestication cultivation stage, and sludge loading remains 0.064kgCOD/kgSS.d；Water inlet nitrogen Load is 0.8kgNH4 +-N/(m3.d), hydraulic detention time 6h.
- 8. according to claim 7 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, in 27-60d, Anammox flora occurs, ammonia nitrogen synchronous removal within the scope of 1:1-1:2 with nitrous nitrogen concentration ratio.
- 9. according to claim 8 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, in 61-98d, Anammox flora concentration improves the stage, sludge loading is promoted to 0.078kgCOD/kgSS.d, water For power shorter residence time to 5h, nitrogen load of intaking promotes most 0.96kgNH4 +-N/(m3.d)。
- 10. according to claim 9 flow up SNAD technique quick start method in the aerobic membrane bioreactor that declines, feature It is, anaerobic ammonium oxidation granular coexists with floc sludge after completing SNAD technique start-up course.
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Cited By (2)
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|---|---|---|---|---|
| CN110054287A (en) * | 2019-05-13 | 2019-07-26 | 北京化工大学 | A method of passing through control mixed liquor characteristics decelerating membrane pollution in SNAD technique |
| CN115536214A (en) * | 2022-10-11 | 2022-12-30 | 中国恩菲工程技术有限公司 | Method for treating leachate of waste incineration plant |
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Effective date of registration: 20221222 Address after: 100000 Room 305, Comprehensive Building, Science Park, Beijing University of Chemical Technology, No. 35, Chaoqian Road, Science Park, Changping District, Beijing Patentee after: Guotuo Chemical Energy Environmental Technology (Beijing) Co.,Ltd. Address before: 100029 Beijing University of Chemical Technology, 15 North Third Ring Road, Beijing, Chaoyang District Patentee before: BEIJING University OF CHEMICAL TECHNOLOGY |