CN104944701B - Based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving method - Google Patents
Based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving method Download PDFInfo
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Abstract
The present invention is a kind of based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving method.In traditional A2On the basis of O techniques, the different gallerys in aerobic zone or region are subjected to subregion, pass through blower fan of sewage treatment plant's central control system to aerating system, the control of pipeline and air valve etc., intermission aeration is carried out to aerobic zone, allow in aerobic zone has a region to be in low dissolved oxygen state all the time, DO ＜ 0.5mg/L, at the same time other regions are normally aerated and are in high dissolved oxygen state DO2 3mg/L, aerobic zone different zones are alternately in low dissolved oxygen state, each region time in low dissolved oxygen state in a cycle is t/n, t is aerobic zone hydraulic detention time, n is aerobic zone gallery or number of regions, pulse period is aerobic zone hydraulic detention time, aerobic zone is carried out after intermittent pulse aeration, realize alternately Anoxic/Aerobic environment, intensified anti-nitrated effect, lifting sewage treatment effect and water quality.
Description
Technical field
The present invention relates to technical field of sewage, specifically based on intermission aeration strengthening sewage denitrification and dephosphorization and section
The method that can be lowered consumption.
Background technology
Nitrogen phosphorus is the important nutrient for causing body eutrophication in sewage effluent.As China's body eutrophication is asked
That inscribes is on the rise, Yi Jixin《Town sewage plant pollutant emission standard》(GB18918-2002) implementation, research and development are economical high
Imitate stable sewage denitrification and dephosphorization technology, it has also become the technical need that water treatment field is badly in need of.Meanwhile, sewage treatment plant's operation energy
Consumption is higher, is that it runs major investment expense source；It is energy consumption main consumer again to be aerated oxygen supply, so reduction sewage treatment plant
Aeration energy consumption is its energy-saving key measures.
Current sewage denitrification and dephosphorization is mainly using the biological nitrification and denitrification based on anaerobic/anoxic/aerobic process and life
The technique that thing chemical dephosphorization is combined.Because there is low-carbon-source feature in China's sewage, so effectively carbon source is relatively low in water inlet,
It is not enough to support effective denitrogenation dephosphorizing；Moreover, in traditional denitrification dephosphorization technique, there is denitrifying bacterium and polyP bacteria competition carbon
Source problem, denitrogenation and dephosphorization cannot concurrently reach optimum efficiency.Biological denitrification process mainly includes aerobic nitrification and the anti-nitre of anoxic
Change.General biological denitrification process is after Anoxic/Aerobic（AO）Technique, namely Prepositive denitrification is used, aerobic section nitrification liquid is back to
Anoxic section, denitrification denitrogenation is carried out using carbon source in water inlet.The denitrification percent of traditional AO techniques is returned by mixed liquid recycle ratio and sludge
The control of ratio is flowed, in order to reach higher denitrification percent it is necessary to improving reflux ratio.Using traditional AO techniques, in mixed liquid recycle ratio
For 300%, return sludge ratio is under conditions of 100%, the synthesis of cell Self substances not to be considered, nitrogen removal rate is reached as high as
80% or so.Continue to increase reflux ratio, nitrogen removal rate rising is not obvious, and the dissolved oxygen for entering anoxic pond from Aerobic Pond will
Increase, so as to consume organic carbon source in water inlet, influences the efficiency of denitrification denitrogenation.
At present, intermission aeration is mainly used in membrane bioreactor controlling fouling membrane, there is not yet for sewage treatment plant
The research of aeration control and report.
The content of the invention
The purpose of the present invention is to be directed to China's low-carbon-source sewage feature, with reference to the progress that nearest denitrogenation dephosphorizing is theoretical,
There is provided a kind of based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving sewage water treatment method.
The present invention provides the strengthening sewage denitrification and dephosphorization technology of oxygen using intermission aeration pattern, passes through intermission aeration mould
Formula, can intensified denitrification and dephosphorization efficiency, while sewage treatment plant's operation energy consumption, particularly city and rural area distributing can be reduced
Sanitary sewage disposal.
The technical scheme is that：Based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving sewage disposal side
Method is predominantly in traditional A2On the basis of O techniques, the different gallerys in aerobic zone or region are subjected to subregion, by sewage treatment plant
Control of the control system to the blower fan, pipeline and air valve of aerating system etc. is entreated, intermission aeration is realized to aerobic zone, is allowed in aerobic zone
All the time a region is in low dissolved oxygen state（DO ＜ 0.5mg/L）, at the same time the normal aeration in other regions is in high dissolved oxygen shape
State（DO2-3mg/L）.Wherein, aerobic zone different zones are alternately in low dissolved oxygen state, and each region is in a cycle
The time of low dissolved oxygen state is t/n, and t is aerobic zone hydraulic detention time, and n is aerobic zone gallery or number of regions, and the pulse period is
Aerobic zone hydraulic detention time.Aerobic zone is carried out after intermittent pulse aeration, aerobic zone will remain a gallery or area
Domain is in low dissolved oxygen state（DO ＜ 0.5mg/L）, realize at alternately Anoxic/Aerobic environment, intensified anti-nitrated effect, lifting sewage
Manage effect and water quality.The dissolved oxygen being respectively mounted according to each gallery in aerobic zone or region（DO）, COD（CODcr）, total nitrogen
（TN）, total phosphorus（TP）, ammonia nitrogen（NH3-N）Deng the achievement data in on-line checking instrument, carry out the control of intermission aeration amount, with up to
To stable production run effect.This technique can obtain good Nitrogen/Phosphorus Removal and reduction sewage disposal operation energy consumption into
This.
The present invention is in traditional A2Carried out on O Process ba- sis, sewage plant integrated artistic is by anaerobic/anoxic/aerobic/precipitate phase
Composition is made up of hypoxic/anaerobic/aerobic/precipitate phase：Sewage by pretreatment flows into anaerobic zone（DO ＜ 0.2mg/
L）, polyP bacteria is using small molecule carbon source material and is stored as the biochemical process that release phosphorus occurs for interior polymers, and anaerobic zone water outlet is suitable
Secondary entrance anoxic zone（DO ＜ 0.5mg/L）Carry out denitrification, then enter back into aerobic zone through intermission aeration formed it is high and low aerobic
Area（High DO, 2-3mg/L；Low DO, ＜ 0.5mg/L）Occurs the process of nitrification and intake phosphorus, in high and low dissolved oxygen area alternation procedure
The progress of synchronous nitration and denitrification is would be beneficial for, finally the sewage mixed liquor through intermission aeration aerobic zone enters precipitate phase, sunk
Supernatant is discharged to sludge part after natural water, precipitation and is back to anaerobic zone behind shallow lake, while excess sludge in sludge is discharged
Concentrated into sludge treating system, be dehydrated after outward transport carry out effective specific resistance to filtration.
Anaerobic stages are chiefly to facilitate the biochemistry that polyP bacteria etc. can accumulate the microorganism of interior polymers in the technique of the present invention
Metabolism, the small molecule organic carbon source for making full use of anaerobic hydrolysis to produce, and accumulation are interior polymers in case later stage denitrification and biology
Taking the photograph phosphorus needs use.Technique anoxic phases are chiefly to facilitate denitrifying bacterium and carry out denitrification denitrogenation.Aerobic stage is mainly nitrification and gone
Except organic matter.The second pond of precipitate phase is mainly retention sludge, and returned sludge is into main process, improves sludge concentration simultaneously
Improve sewage treating efficiency.
The key technology of the present invention is the improvement to aerobic stage operational mode, main to use intermission aeration pattern（Incite somebody to action
Oxygen area is carried out after subregion by the regulation and control realization of central control system, intake valve and pipeline）, oxygen-supplying amount, shape can be efficiently controlled
Into high and low dissolved oxygen area, alternately Anoxic/Aerobic environment is realized, strengthens aerobic stage synchronous nitration and denitrification.First, the intermission aeration
Pattern can rationally control oxygen-supplying amount, because heterotroph and ammonia nitrifier have higher oxygen competitiveness, so can suppress
The activity of nitrite nitrifier, is advantageously implemented short-cut nitrification and denitrification.Secondly, by intermission aeration, strengthened denitrification can
The capacity of returns of follow-up mud mixed liquid is reduced, indirectly reduction sewage pump operation energy consumption.Furthermore, by controlling oxygen-supplying amount, can drop
The invalid utilization of low-carbon-source material, and strengthen for during the denitrogenation dephosphorizings such as denitrification, the removal efficiency of enhanced sewage total nitrogen.
Finally, intermission aeration pattern is passed through, it is possible to increase efficiency of oxygen supply, so as to reduce aeration in sewage treatment energy consumption.
Brief description of the drawings
Fig. 1 is process for removing nitrogen and phosphor from sewage flow chart of the invention.
Fig. 2 is intermission aeration schematic diagram of the invention.
In Fig. 2, A, B, C, D make a living anti-pond, PA、PB、PC、PDFor air valve, a, b, c, d are online monitoring instrument（Dissolved oxygen,
COD, total nitrogen, total phosphorus, ammonia nitrogen etc.）.
Embodiment
Embodiment 1：
As shown in figure 1, the sewage water treatment method of the present invention is mainly made up of anaerobic/anoxic/aerobic/precipitate phase, or
It is made up of hypoxic/anaerobic/aerobic/precipitate phase；Sewage by pretreatment flows into anaerobic zone, and polyP bacteria etc. utilizes small molecule carbon
Source material is simultaneously stored as interior polymers, main to occur the biochemical processes such as release phosphorus.Anaerobic zone water outlet sequentially enters anoxic zone and carried out
Denitrification, occurs to nitrify and absorb the processes such as phosphorus, last sewage mixed liquor flows into settling zone subsequently into intermission aeration aerobic zone.
Supernatants after precipitation discharges processing system to natural water；Sludge part is back to anaerobic zone after precipitation, realizes that sludge is passed through respectively
Anaerobic- anoxic- oxic alternation procedure is gone through, the removal to each polluter in sewage is completed.The discharge of precipitating sludge part is back to
Anaerobic zone, outward transport carries out effective specific resistance to filtration after excess sludge is concentrated, is dehydrated into sludge treating system.
As shown in Fig. 2 if there are region A, B, C, D of 4 gallerys, aerobic zone hydraulic detention time 10h in sewage plant aerobic zone,
Now pass through central control system（PLC）Control to air blower, pipeline and air valve, adjusts the air inflow in each region, regulates and controls air inlet
Valve PARegion A is set to be in low dissolved oxygen state, other three regions are normally aerated the high dissolved oxygen state 2.5 of maintenance；Regulate and control after 2.5h into
Air valve PAWith PBRegion B is set to be in low dissolved oxygen state, its excess-three region is in high dissolved oxygen state；Region C, D is sequentially completed to be in
The situation of low dissolved oxygen state, is then return to A so circulations and realizes intermission aeration repeatedly.Simultaneously each gallery be provided with DO, CODcr,
TN、TP、NH3The on-line checking instrument such as-N, can be monitored to its achievement data, as the foundation of process control, really
Protect the efficient process to sewage and production stable operation.
Claims (1)
1. it is a kind of based on intermission aeration strengthening sewage denitrification and dephosphorization and energy-saving method, it is characterised in that：It is carried out as follows：
In A2On the basis of O techniques, aerobic zone different zones are subjected to subregion, wherein, the A2O techniques are by anaerobism, anoxic, good
Oxygen, precipitate phase composition, anaerobism, anoxic, aerobic, precipitate phase are sequentially communicated, and aerobic section produces phegma and flows back to anoxic section, sinks
The shallow lake stage is provided with second pond, and returned sludge is again introduced into anaerobism section, and excess sludge discharge is by sewage treatment plant's center control
Unite the control to the air blower, pipeline and air valve of aerating system, intermission aeration is carried out to aerobic zone, allow in aerobic zone has one all the time
Region be in low dissolved oxygen state, dissolved oxygen DO ＜ 0.5mg/L, at the same time other regions normally aeration be in high dissolved oxygen state,
Dissolved oxygen DO2-3mg/L, aerobic zone different zones alternately be in low dissolved oxygen state, the aerobic zone have 4 gallerys region A,
B, C, D, four gallerys are sequentially communicated, aerobic zone hydraulic detention time 10h；Central control system is first passed through to air blower, pipeline
And the control of air valve, the air inflow in each region is adjusted, regulation and control intake valve PA makes region A be in low dissolved oxygen state, other three areas
Domain is normally aerated the high h of dissolved oxygen state 2.5 of maintenance；Regulate and control intake valve PA and PB after 2.5h, region B is in low dissolved oxygen state,
Its excess-three region is in high dissolved oxygen state；The situation that region C, D are in low dissolved oxygen state is sequentially completed, region A is then return to
So intermission aeration is realized in circulation repeatedly；Aerobic zone is carried out after intermittent pulse aeration, realizes alternately Anoxic/Aerobic environment, and reinforcing is anti-
Nitrification, lifting sewage treatment effect and water quality；Each region in aerobic zone is respectively mounted dissolved oxygen, COD, total nitrogen, total phosphorus
With ammonia nitrogen on-line checking instrument, and according to the achievement data in on-line checking instrument, the control of intermission aeration amount is carried out.
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| CN107055949B (en) * | 2017-03-12 | 2018-11-27 | 云南滇清环境科技有限公司 | A kind of efficient low-consume Rubber Industrial Wastewater processing method and system that can flexibly switch technique |
| CN109809563A (en) * | 2019-03-25 | 2019-05-28 | 张庆五 | A kind of sewage water treatment method |
| CN110040914A (en) * | 2019-05-20 | 2019-07-23 | 北京市高速公路交通工程有限公司 | A kind of sewage disposal device and treatment process for domestic sewage denitrifying-dephosphorizing |
| CN110127941A (en) * | 2019-05-20 | 2019-08-16 | 北京市高速公路交通工程有限公司 | A kind of biological and chemical method coupling denitrification dephosphorization technique and processing equipment |
| CN111170573A (en) * | 2020-01-16 | 2020-05-19 | 河海大学 | Method for treating sewage containing organic waste liquid |
| CN111470629A (en) * | 2020-04-17 | 2020-07-31 | 西安建筑科技大学 | Facultative active sludge sewage treatment method |
| CN112047575B (en) * | 2020-09-10 | 2022-06-24 | 江苏润誉环保设备科技有限公司 | Method for treating pyromellitic dianhydride production wastewater and special device |
| CN112997934B (en) * | 2021-03-18 | 2023-01-17 | 大连海洋大学 | Method for promoting fertility improvement of stichopus japonicus parents |
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| CN1054830C (en) * | 1995-04-28 | 2000-07-26 | 清华大学 | Sewage-treatment method of oxidizing sewage in ditch, capable of alteratively working at four ditches |
| CN1302770A (en) * | 2001-02-27 | 2001-07-11 | 机械工业部机械科学研究院环境保护技术与装备研究所 | Multi-stage anaerobic-aerobic process for treating sewage |
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