CN106242051A - A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed - Google Patents
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed Download PDFInfo
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- CN106242051A CN106242051A CN201610630255.5A CN201610630255A CN106242051A CN 106242051 A CN106242051 A CN 106242051A CN 201610630255 A CN201610630255 A CN 201610630255A CN 106242051 A CN106242051 A CN 106242051A
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- fluid bed
- zeolite
- denitrification
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- bio fluid
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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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The invention discloses a kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed.This technique mainly utilizes anaerobic denitrifying device and Zeolite-bio fluid bed to realize, and wherein anaerobic denitrifying device is preposition, and Zeolite-bio fluid bed is rearmounted.The present invention utilizes Zeolite-bio fluid bed to realize the nitrosation reaction of Low Concentration Ammonia Containing Wastewater efficient stable, then passes through the controlled backflow ratio in fluid bed by high nitrosoation rate return of waste water to anaerobic denitrifying device, realizes total nitrogen removing further.This invention can solve a short distance nitration difficult problem for Low Concentration Ammonia Containing Wastewater, and realize the ammonia nitrogen of economical and efficient and the removal of total nitrogen, floor space is little, and operating cost is relatively low, is that town sewage carries the effective ways marking transformation with the Low Concentration Ammonia Containing Wastewater denitrogenation processing of low ratio of carbon to ammonium.
Description
Technical field
The invention belongs to environmental conservation technical field of waste water processing, particularly to a kind of short containing Zeolite-bio fluid bed
Journey nitration denitrification denitrogenation technique.
Background technology
For removing the nitrogen in waste water, traditional complete nitration denitrification technique is by being nitrate nitrogen by mineralized nitrogen, then warp
Being back to Denitrification above removed, during being somebody's turn to do, nitration reaction needs to consume 4.57gO in theory completely2/ gN, instead
Nitration reaction often requires that the carbon source in waste water sufficient (C/N is more than 3), and the carbon source demand amount in Practical Project is higher, ability
Meet the demand of complete nitration denitrification.For reducing oxygen consumption and the carbon source demand amount of anti-nitration reaction, the short distance of nitration reaction
Nitration denitrification technique becomes study hotspot.Short-cut nitrification and denitrification technique is by allowing ammonia nitrogen rest on Nitrification Stage, then incites somebody to action
Nitrite nitrogen carries out denitrification to remove total nitrogen, can save the oxygen consumption of about 25% and the carbon source demand amount of 40% in theory, thus
Reduce the operating cost of wastewater biological denitrificaion.
Realize the nitrosation that challenge is how to realize efficient stable of waste water short-cut nitrification and denitrification, i.e. guarantee that ammonia nitrogen is big
Part only rests on the nitrosation reaction stage.For high-concentration ammonia nitrogenous wastewater (such as mud nitrification liquid, percolate, simulation height
Ammonia nitrogen waste water etc.) short-cut nitrification and denitrification research report more, and have developed the more short distance nitration realizing stability and high efficiency
Denitrification process, also has many successfully Practical Project cases simultaneously.But for low ammonia nitrogen waste water, a current difficult problem be still as
What realizes the nitrite nitrogen of stability and high efficiency accumulates.It is difficult to height as typical Low Concentration Ammonia Containing Wastewater, Ammonia Nitrogen in Sewage and total nitrogen
Effect removing, denitrogenation cost height are always problem present in the daily operation of urban wastewater treatment firm.Additionally, in November, 2015 China
In " urban wastewater treatment firm pollutant emission standard (suggestion solicits original text) " that Environmental Protection Department general office of people's republic issues
Town sewage plant is clearly proposed higher ammonia nitrogen and total nitrogen emission request.
Therefore, useless in the urgent need to developing the low-concentration ammonia-nitrogen of a kind of stability and high efficiency and economical and practical low ratio of carbon to ammonium at present
Water short-cut nitrification and denitrification technique.
Summary of the invention
For realizing the short-cut nitrification and denitrification of Low Concentration Ammonia Containing Wastewater, the denitrification operation reducing Low Concentration Ammonia Containing Wastewater becomes
This, the invention discloses a kind of denitrification process containing Zeolite-bio fluid bed, and the processing system of this technique is by anaerobic denitrifying
Device and Zeolite-bio fluid bed composition, wherein for make full use of into the carbon source in water, anaerobic denitrifying device is preposition, and zeolite is raw
Fluidized beds is rearmounted.
The present invention utilizes Zeolite-bio fluid bed to realize the nitrosation reaction of Low Concentration Ammonia Containing Wastewater efficient stable, then passes through
Controlled backflow ratio in fluid bed by high nitrosoation rate return of waste water to anaerobic denitrifying device, thus realize total nitrogen removing.
The present invention can solve a short distance nitration difficult problem for the Low Concentration Ammonia Containing Wastewater of low ratio of carbon to ammonium, and realizes the ammonia of economical and efficient
Nitrogen and the removal of total nitrogen, be that town sewage proposes mark transformation, and particularly the Low Concentration Ammonia Containing Wastewater denitrogenation processing of low ratio of carbon to ammonium has
Efficacious prescriptions method.
The purpose of the present invention is achieved through the following technical solutions:
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed, comprises step in detail below:
(1) anaerobic denitrifying device: select anaerobic reactor, controls sludge concentration and hydraulic detention time, at water inlet
Place, by Low Concentration Ammonia Containing Wastewater with from the recirculation water mixing that the gravity flow of Zeolite-bio fluid bed comes, is carried out in anaerobic denitrifying device
Short-cut denitrification reacts, it is achieved the total nitrogen in waste water is removed；
(2) Zeolite-bio fluid bed: using zeolite as fluid bed filler, adhere to micro-in the loose porous road structure of zeolite
Biological forming nitrification biomembrane, the ammonia nitrogen in waste water is adsorbed by the adsorption site on zeolite surface the most simultaneously, be passed through into
Water and air, high speed fluidised zeolite adsorption forms micro-oxygen or anaerobic environment on site so that the oxidation of ammonia nitrogen is with nitrosation
Reaction is main, suppresses activity and the growth of nitrobacteria simultaneously, it is achieved the ammonia nitrogen removal of stability and high efficiency and nitrite nitrogen accumulation；Water inlet
After fluidized bed processing, nitrosation water outlet flows into effluent weir, realizes backflow and outer row in effluent weir.
Further, in step (1), described anaerobic reactor includes anaerobism flap reactor and up-flow anaerobic sludge blanket
One in reactor.
Further, the sludge concentration described in step (1) is 1500-6000mg/L.
Further, the hydraulic detention time described in step (1) is 0.2-2h.
Further, in step (1), described Low Concentration Ammonia Containing Wastewater refers to the waste water that ammonia nitrogen concentration is 30-100mg/L.
Further, the size of the zeolite described in step (2) is 0.3-0.6mm.
Further, in step (2), the upflow velocity entering water and air is entered by flow of inlet water size and aeration rate size
Row regulation, in terms of upflow liquid velocity, preferably 15-50m/h.
Further, in step (2), needing to divide effluent weir equal proportion according to operation, every part is provided with outlet, phase
Separate between Hu, choose a portion as outer drain outlet, remain and export as recirculation water, by opening of effluent weir valve
Close regulation controlling effluent recycling ratio is (1～7): 1, is preferably (2～7): 1, and recirculation water gravity flow mixes with Low Concentration Ammonia Containing Wastewater,
Enter anaerobic denitrifying device；Described reflux ratio is the ratio of recirculation water flow and outer drain discharge.
The principle of the present invention is:
In anaerobic denitrifying device, denitrifying bacteria utilize water inlet and recirculation water in Organic substance and nitrite nitrogen carry out by
Level anti-nitration reaction, utilizes flap design can ensure higher sludge concentration and preferable mud-water separation effect, it is ensured that good simultaneously
Good denitrification effect；In Zeolite-bio fluid bed, under conditions of filler fluidization, utilize adsorption site within zeolite and
Nitrification biomembrane, it is achieved the nitrosation reaction under the most micro-oxygen or anaerobic environment and ammonia nitrogen absorption desorbing dynamic equilibrium, thus obtain
Obtain the nitrite nitrogen accumulation of efficient stable, recycle fluid bed and the difference in height of anaerobic denitrifying device and particular design water outlet subsequently
Weir, by the effluent recycling of control ratio to anaerobic denitrifying device, to realize the short-cut nitrification and denitrification of waste water.
Compared with prior art, the present invention has the following advantages and beneficial effect:
(1) present invention can realize the efficient stable partial nitrification and denitrification of Low Concentration Ammonia Containing Wastewater of low ratio of carbon to ammonium, joint
Province's carbon source consumes, and reduces the operating cost of biological denitrificaion；
(2) present invention operates relatively easy, and equipment needed thereby floor space is little, and equipment needed thereby is less, is particularly suited for low-carbon (LC)
The mark that carries of N ratio wastewater is transformed.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed.
Fig. 2 is the top view in 4 timesharing such as grade of the effluent weir in Zeolite-bio fluid bed.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Fig. 1 is the schematic diagram of the short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed, mainly includes that anaerobism is anti-
Nitrification installation 1, Zeolite-bio fluid bed 2, effluent weir 3, filler 4 and liquid level controller (LIC) 5；Wherein anaerobic denitrifying device 1
Preposition, Zeolite-bio fluid bed 2 is rearmounted；Effluent weir 3 in Zeolite-bio fluid bed 4 timesharing such as grade top view as shown in Figure 2.
In FIG, Low Concentration Ammonia Containing Wastewater is introduced into anaerobic denitrifying device 1, with recirculation water by a certain percentage first
Mixing, by entering back into Zeolite-bio fluid bed 2 after anaerobic denitrifying device.In Zeolite-bio fluid bed, using zeolite as
Fluid bed filler, attached microbial formation nitrification biomembrane in the loose porous road structure of zeolite, and the suction on zeolite surface
Ammonia nitrogen in waste water is adsorbed by attached site the most simultaneously, is passed through into water and air, on high speed fluidised zeolite adsorption site
Form micro-oxygen or anaerobic environment so that the oxidation of ammonia nitrogen, based on nitrosation reaction, suppresses activity and the life of nitrobacteria simultaneously
Long, it is achieved the ammonia nitrogen removal of stability and high efficiency and nitrite nitrogen accumulation.Then turn on two valves in Fig. 2, make going out of high nitrosoation rate
Water from flowing to anaerobic denitrifying device, utilizes the microorganism in anaerobic denitrifying device to carry out denitrification work with certain reflux ratio
With, reach the purpose of denitrogenation.Have the water outlet of high nitrosoation rate because having refluxed, anaerobic denitrifying device is substantially carried out the anti-nitre of short distance
Changing reaction, required carbon source amount will reduce, and promote the operating cost making full use of and lowering biological denitrificaion of water-inlet carbon source.Liquid
Level controller (LIC) 5 mainly controls the flow of inlet water of fluid bed by the water outlet liquid level of monitoring anaerobic denitrifying device in real time,
Thus control more stable upflow velocity.
Embodiment 1
Low-concentration ammonia-nitrogen simulated wastewater with ammonia nitrogen concentration as 30mg/L is for processing object, described waste water CODCrFor 150mg/
L.Utilize the present invention that described waste water is processed: anaerobic denitrifying apparatus sewage sludge concentration is 1500mg/L, hydraulic detention time
For 0.2h, reflux ratio is 2:1, and Zeolite-bio fluid bed filler particle size is 0.3mm, and upflow velocity is 15m/h, identical waterpower
Carry out with traditional denitrogenation AO technique under the time of staying and reflux ratio running contrast, obtain a result as shown in table 1:
Table 1
As shown in Table 1, the present invention is relative to tradition A/O technique, and under conditions of identical carbon source quantity delivered, nitrite nitrogen accumulates
Effect and total nitrogen removal effect all have greatly improved.
Embodiment 2
Low-concentration ammonia-nitrogen simulated wastewater with ammonia nitrogen concentration as 80mg/L is for processing object, described waste water CODCrFor 250mg/
L, utilizes the present invention to process described waste water: anaerobic denitrifying apparatus sewage sludge concentration is 4000mg/L, hydraulic detention time
For 2h, reflux ratio is 3:1, and Zeolite-bio fluid bed filler particle size is 0.4mm, and upflow velocity is 48m/h, and identical waterpower is stopped
Stay and carry out with traditional denitrogenation AO technique under time and reflux ratio running contrast, obtain a result as shown in table 2:
Table 2
As shown in Table 2, the present invention is relative to tradition A/O technique, and under conditions of identical carbon source quantity delivered, nitrite nitrogen accumulates
Effect and total nitrogen removal effect all have greatly improved.
Embodiment 3
The former water of the town sewage plant with ammonia nitrogen as 48.6mg/L is for processing object, former water CODCrFor 265mg/L.Utilize this
Described former water is processed by invention: anaerobic denitrifying apparatus sewage sludge concentration is 4200mg/L, and hydraulic detention time is 1.2h, returns
Flow ratio is 3:1, and Zeolite-bio fluid bed filler particle size is 0.3mm, and upflow velocity is 30m/h, identical hydraulic detention time
Contrast with carrying out with traditional denitrogenation AO technique under reflux ratio running, obtain a result as shown in table 3:
Table 3
Owing to town sewage containing the refractory organic of some, therefore the bioavailable Organic substance phase of former water
Lower than in simulated wastewater；Table 3 result shows, the present invention is relative to tradition A/O technique, when processing actual town sewage,
Nitrite nitrogen accumulation effect is relative with total nitrogen removal effect more preferable.
Embodiment 4
Simulated wastewater with ammonia nitrogen as 100mg/L is for processing object, former water CODCrFor 400mg/L.Utilize the present invention to institute
Stating waste water to process: anaerobic denitrifying apparatus sewage sludge concentration is 6000mg/L, hydraulic detention time is 2.0h, and reflux ratio is 7:
1, Zeolite-bio fluid bed filler particle size is 0.6mm, and upflow velocity is 50m/h, identical hydraulic detention time and reflux ratio
Lower and traditional denitrogenation AO technique carries out running contrast, obtains a result as shown in table 4:
Table 4
As shown in Table 4, the present invention is relative to tradition A/O technique, and under conditions of identical carbon source quantity delivered, nitrite nitrogen accumulates
Effect and total nitrogen removal effect all have greatly improved.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-described embodiment
Limit, the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify,
All should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (10)
1. the short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed, it is characterised in that this technology utilization is detested
Oxygen denitrification device and Zeolite-bio fluid bed realize, and wherein anaerobic denitrifying device is preposition, and Zeolite-bio fluid bed is rearmounted；Profit
The nitrosation reaction of Low Concentration Ammonia Containing Wastewater efficient stable is realized with Zeolite-bio fluid bed, then by Zeolite-bio fluid bed
Controlled backflow ratio by nitrosation return of waste water to anaerobic denitrifying device, realize further total nitrogen removing.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 1, it is special
Levy and be, comprise the steps:
(1) anaerobic denitrifying device: in water inlet by Low Concentration Ammonia Containing Wastewater with from returning that the gravity flow of Zeolite-bio fluid bed comes
Flowing water mixes, and carries out short-cut denitrification reaction in anaerobic denitrifying device, it is achieved the total nitrogen in waste water is removed；Selection anaerobism is anti-
Answer device, control sludge concentration and hydraulic detention time；
(2) Zeolite-bio fluid bed: using zeolite as fluid bed filler, attached microbial in the loose porous road structure of zeolite
Forming nitrification biomembrane, the ammonia nitrogen in waste water is adsorbed by the adsorption site on zeolite surface the most simultaneously, be passed through into water and
Air, fluidised zeolite adsorption site forms micro-oxygen or anaerobic environment so that the oxidation of ammonia nitrogen based on nitrosation reaction,
Suppress activity and the growth of nitrobacteria, it is achieved the ammonia nitrogen removal of stability and high efficiency and nitrite nitrogen accumulation simultaneously；Water inlet is through biology
After fluidized bed processing, nitrosation water outlet flows into effluent weir, realizes backflow and outer row in effluent weir.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (1), described anaerobic reactor is in anaerobism flap reactor and upflow anaerobic sludge blanket reactor
Kind.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (1), described sludge concentration is 1500-6000mg/L.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (1), described hydraulic detention time is 0.2-2h.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (1), the ammonia nitrogen concentration of described Low Concentration Ammonia Containing Wastewater is the waste water of 30-100mg/L.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (2), the size of described zeolite is 0.3-0.6mm.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levying and be, in step (2), the upflow velocity entering water and air is adjusted by flow of inlet water size and aeration rate size.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levy and be, in step (2), enter the upflow velocity of water and air in terms of upflow liquid velocity, for 15-50m/h.
A kind of short-cut nitrification and denitrification denitrification process containing Zeolite-bio fluid bed the most according to claim 2, it is special
Levy and be, in step (2), by adjusting the on-off control effluent recycling of mill weir valve than for (1 ~ 7): 1, recirculation water gravity flow with
Low Concentration Ammonia Containing Wastewater mixes, and enters anaerobic denitrifying device.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108217934A (en) * | 2018-01-31 | 2018-06-29 | 华南理工大学 | A kind of middle low concentration wastewater low-carbon processing method and processing device of low carbon/nitrogen ratio |
| CN108545827A (en) * | 2018-05-14 | 2018-09-18 | 北京协同创新研究院 | A kind of technique that town sewage realizes stable short distance nitration |
| CN108658226A (en) * | 2018-05-14 | 2018-10-16 | 北京协同创新研究院 | A kind of complex carrier and production method promoting short distance nitration startup and stable operation |
| CN114735824A (en) * | 2022-04-25 | 2022-07-12 | 扬州大学 | Process and system for treating domestic sewage by partial nitrification-denitrification-shortcut autotrophic denitrification anaerobic ammonia oxidation |
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| CN2863781Y (en) * | 2005-12-30 | 2007-01-31 | 江苏一环集团有限公司 | High-concentration ammonia nitrogen waste water treatment apparatus |
| CN101250009A (en) * | 2008-04-02 | 2008-08-27 | 北京城市排水集团有限责任公司 | Device and method for realizing shortcut nitrification of sludge digestive fluid by continuous flow suspended carrier |
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- 2016-07-31 CN CN201610630255.5A patent/CN106242051A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2863781Y (en) * | 2005-12-30 | 2007-01-31 | 江苏一环集团有限公司 | High-concentration ammonia nitrogen waste water treatment apparatus |
| CN101250009A (en) * | 2008-04-02 | 2008-08-27 | 北京城市排水集团有限责任公司 | Device and method for realizing shortcut nitrification of sludge digestive fluid by continuous flow suspended carrier |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108217934A (en) * | 2018-01-31 | 2018-06-29 | 华南理工大学 | A kind of middle low concentration wastewater low-carbon processing method and processing device of low carbon/nitrogen ratio |
| CN108217934B (en) * | 2018-01-31 | 2021-05-14 | 华南理工大学 | Low-carbon treatment method and device for low-carbon/nitrogen ratio medium-low concentration wastewater |
| CN108545827A (en) * | 2018-05-14 | 2018-09-18 | 北京协同创新研究院 | A kind of technique that town sewage realizes stable short distance nitration |
| CN108658226A (en) * | 2018-05-14 | 2018-10-16 | 北京协同创新研究院 | A kind of complex carrier and production method promoting short distance nitration startup and stable operation |
| CN114735824A (en) * | 2022-04-25 | 2022-07-12 | 扬州大学 | Process and system for treating domestic sewage by partial nitrification-denitrification-shortcut autotrophic denitrification anaerobic ammonia oxidation |
| CN114735824B (en) * | 2022-04-25 | 2023-08-04 | 扬州大学 | Process and system for treating domestic sewage by partial nitrification and denitrification-short-range autotrophic denitrification anaerobic ammoxidation |
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Effective date of registration: 20190315 Address after: 528313 Chencun Town, Shunde District, Foshan City, Guangdong Province Chihua Residential Committee Guanglong Industrial Park, 18 Xingye Road, Shunlian Machinery City, 22 403A Applicant after: Foshan Huaer Ammonium Biotechnology Co., Ltd. Address before: 510640 No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Applicant before: Wang Xiaojun Applicant before: Guangzhou South China University of Technology science and Technology Park Co., Ltd. |
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Application publication date: 20161221 |