CN104829066B - Integrated high-efficiency decarburization denitrification dephosphorization technique and system - Google Patents
Integrated high-efficiency decarburization denitrification dephosphorization technique and system Download PDFInfo
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- CN104829066B CN104829066B CN201510276016.XA CN201510276016A CN104829066B CN 104829066 B CN104829066 B CN 104829066B CN 201510276016 A CN201510276016 A CN 201510276016A CN 104829066 B CN104829066 B CN 104829066B
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Abstract
The invention belongs to technical field of sewage, specifically related to a kind of efficient decarburization denitrification dephosphorization system of sewage disposal and technique, it is mainly used in the processing of high concentration domestic sewage of villages and small towns and industrial wastewater, particularly suitable for high COD, high ammonia nitrogen sanitary sewage or industrial wastewater processing.Multipoint water feeding aeration+primary sedimentation+anoxic+aerobic+secondary precipitation in the present invention, can use My Perspective On The Co-building, further reduce floor space, cost of reducing investment outlay.The present invention rationally and makes full use of carbon source using the distribution water entry position of science and inflow, is that denitrifying bacterium, nitrifier, polyP bacteria etc. provide good living environment, improves the efficiency of decarburization and denitrogenation dephosphorizing.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of integrated high-efficiency decarburization denitrogenation of processing sewage is removed
Phosphorus technique and system, mainly for the treatment of the domestic sewage of villages and small towns and industrial wastewater of high concentration, especially high COD, high ammonia nitrogen
Sanitary sewage or industrial wastewater.
Background technology
In recent decades, developing rapidly with China's economy, the quickening of urbanization process, Urban Water Shortage Problem of Cities is increasingly dashed forward
Go out, water shortage scope is also expanding year by year, and shortage of water resources problem is extremely urgent.However, the sanitary sewage that is discharged of city and
If industrial wastewater it is unprocessed or handle it is not up to standard be put into natural water, surface water and groundwater can be caused by different degrees of
Pollution, and the key for solving water shortage problem is that solution water pollution problem.
Usual sanitary sewage mainly contains a large amount of suspended solids, chemically or biodegradable dissolubility or colloidal dispersions have
Machine thing（Characterized with COD and BOD）, nitrogen-containing compound（Including ammonia nitrogen, nitrate nitrogen, nitrite nitrogen and organic nitrogen）, phosphate,
K-na salt, bacterium class biota etc..Natural water body is discharged into if untreated or degree for the treatment of is not enough, water body richness battalion will be caused
The accumulation of fosterization and toxicity, especially when the higher water of nitrogen and phosphorus content is discharged into nature, easily causes the eutrophication of water body,
The foul gas such as ammonia, hydrogen sulfide are discharged, the deterioration of water quality is caused, and pollute environment.
Therefore, the technological design of municipal sewage plant must be from the function for the purpose of single organics removal to depth
The functional shift of denitrogenation dephosphorizing, and its reform course is from traditional Activated Sludge Process to aerobic, anaerobism and the group of anoxic
Box-like technique.However, traditional denitrification dephosphorization technique generally existing technological process is longer, floor space is big, capital expenditure is high, fortune
The shortcomings of row is unstable.What China formulated《Urban wastewater treatment firm pollutant emission standard》（GB18918-2002）To nitrogen, phosphorus
More strict requirements are proposed, newly-built town sewage plant also must be considered that the problem of nitrogen discharge and phosphorus discharge is up to standard, one run
A little sewage plants are also being transformed, and strengthen its denitrogenation dephosphorizing function.Therefore, today of focus is turned into the denitrogenation dephosphorizing of water body,
High-efficient denitrification and dephosphorization systematic research exploitation also just becomes the most important thing solved the problems, such as.
With the quickening of China's Development of China's Urbanization, resident living quantity of wastewater effluent increases severely, and town sewage turns into regional water
The important pollution sources of environment.And the auxiliary facility of the most of middle-size and small-size urban wastewater treatments of China and imperfection, such as water is small, divide
The high domestic sewage in rural areas of divergence, breeding wastewater etc. are directly discharged into water body, can aggravate body eutrophication.In view of Small Urban
Point-source pollution and its water technology fall behind, lack professional, the low feature of managerial skills, it would be highly desirable to a kind of operational administrative letter
Just different scales, the high-efficient denitrification and dephosphorization technique of different quality, are applicable.
The content of the invention
Present invention aims at a kind of integrated high-efficiency decarburization denitrification dephosphorization technique and system for handling sewage is provided, it is led
It is used for the domestic sewage of villages and small towns and industrial wastewater for handling high concentration, especially high COD, the sanitary sewage or Industry Waste of high ammonia nitrogen
Water.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of integrated high-efficiency decarburization denitrification dephosphorization technique, it comprises the following steps：
1）Pending sewage is introduced into grid regulating reservoir；
2）Sewage in grid regulating reservoir is divided into two-way, and the sewage for accounting for sewage total amount 50-80% exposes as first via entrance
Gas pond, enters the first sedimentation basin after being aerated in aeration tank and carries out mud-water separation, the supernatant of the first sedimentation basin enters anoxic pond, the
The sludge part of one sedimentation basin is back to aeration tank to provide strain for aeration tank, and remaining sludge enters at follow-up sludge
Reason system；The sewage for accounting for sewage total amount 20-50% then enters anoxic pond as the second tunnel, and carbon source is provided for denitrification denitrogenation；
3）Sewage after being handled through anoxic pond denitrification enters Aerobic Pond and carries out Air Exposure, further removes COD and ammonia
Nitrogen；
4）Mixed liquor in Aerobic Pond is divided into two-way, and the first via is back to anoxic pond and carries out denitrification processing, reflux ratio control
It is made as the 100-200% of inflow（The clearance of total nitrogen had so both been ensure that, will not flow back again and excessively cause energy dissipation and broken
Bad anaerobic environment）；Second tunnel enters the second sedimentation basin and carries out mud-water separation, the supernatant qualified discharge of the second sedimentation basin, second
A sludge part for sedimentation basin is back to anoxic pond, and another part sludge enters follow-up sludge treating system；
5）Transported after the concentrated dehydration of sludge in sludge treating system.
Wherein, aeration tank hydraulic detention time is 2-4 hours, and anoxic pond hydraulic detention time is 2-4 hours, Aerobic Pond
Hydraulic detention time is 8-12 hours.Sludge concentration is 3800-4200 mg/litres in aeration tank, and anoxic pond and Aerobic Pond are dirty
Mud concentration is 3000-3500 mg/litres.First sedimentation basin, the sludge reflux rate of the second sedimentation basin are 50-100%, the
One sedimentation basin, the surface loading of the second sedimentation basin are 0.7-1.0 cubic metre/square meters per hours.
It is a kind of using above-mentioned technique carry out integrated high-efficiency decarburization denitrogenation dephosphorizing system, it include sludge treating system,
And grid regulating reservoir, aeration tank, the first sedimentation basin, anoxic pond, Aerobic Pond and the second sedimentation basin being sequentially connected with；The anoxic
Outlet of the upper end in pond also with grid regulating reservoir is connected, and the upper end of the Aerobic Pond is also connected with the upper end of anoxic pond；Institute
The pipeline for stating the first sedimentation basin outlet at bottom is divided into two branch roads, and one of them is connected with the bottom of aeration tank, another with
Sludge treating system is connected；The pipeline of the second sedimentation basin outlet at bottom is divided into two branch roads, one of them and anoxic pond
Bottom be connected, another is connected with sludge treating system.
Specifically, the aeration tank bottom is provided with the first airduct being connected with the first air blower, the Aerobic Pond bottom
Provided with the second airduct being connected with the second air blower, the first agitator and the second agitator are provided with the anoxic pond.
In sewage disposal system of the present invention, using double mud methods, aeration tank+sedimentation basin is mainly used in the removal road and entered
Majority of organic pollutants in water, is that subsequent treatment lightens the load；Can be according to influent quality situation, reasonable distribution inflow
The removal of total nitrogen provides sufficient carbon source, while the nitrification of nitrifier will not be influenceed because influent COD is too high again；Load resistance is rushed
Hit, stable effluent quality；Convenient operation and management；My Perspective On The Co-building, saves floor occupying area.
Compared to the prior art, the invention has the advantages that：
1st, the present invention is suitable for the processing of different scales, high COD, the town domestic sewage of high ammonia nitrogen and industrial wastewater, solution
Determine the efficient decarburization Denitrogenation of high COD, the town domestic sewage of high ammonia nitrogen, industrial wastewater.Present system has investment
Cost is low, floor space is small, high treating effect, resistance to overload shock, management service easy, climate influence is small, decarburization denitrogenation effect
Really good many advantages, such as.Multipoint water feeding aeration+primary sedimentation+anoxic+aerobic+secondary precipitation in the present invention, can be using one
Change and build, further reduce floor space, cost of reducing investment outlay.
2nd, in the present invention using the distribution water entry position of science and inflow, rationally and carbon source is made full use of, is denitrification
Bacterium, nitrifier, polyP bacteria etc. provide good living environment, improve the efficiency of decarburization and denitrogenation dephosphorizing.
3rd, in the present invention, aeration tank+sedimentation basin, anoxic pond+Aerobic Pond+sedimentation basin, using double mud methods, the two possesses independence
Sludge return pipe, the flora division of labor is clear and definite, mutually isolated, it is ensured that the Biochemistry Reaction System of respective different microorganisms and preferably
Pollutant removal.Wherein, it is mainly heterotroph in aeration tank, microbial activity is good, with very strong adsorption capacity, warp
After precipitation, substantial amounts of organic pollution is can remove, decarburization efficiency is high；Anoxic pond+Aerobic Pond constitutes A/O techniques, adds inflow
Reasonable distribution, be that denitrification denitrogenation and dephosphorization provide carbon source, not only remove that total nitrogen effect is good, and it is organic further to degrade
Pollutant.
4th, in the present invention, each reaction tank and sedimentation basin My Perspective On The Co-building, floor space are small, and small investment is adapted to intensive city
The Industrial Wastewater Treatment of the industries such as town sewage, new rural planning sanitary sewage and leather, has broad application prospects.
Brief description of the drawings
Fig. 1 is integrated high-efficiency decarburization denitrification dephosphorization system schematic diagram of the present invention.
Embodiment
Technical scheme is further discussed in detail with reference to embodiments, but protection scope of the present invention
It is not limited thereto.
Embodiment 1
A kind of integrated high-efficiency decarburization denitrification dephosphorization technique, it comprises the following steps：
1）Pending sewage is introduced into grid regulating reservoir；
2）Sewage in grid regulating reservoir is divided into two-way, accounts for the sewage of sewage total amount 70% as the first via and enters aeration tank,
Enter the first sedimentation basin after being aerated in aeration tank and carry out mud-water separation, the supernatant of the first sedimentation basin enters anoxic pond, and first sinks
The sludge part in shallow lake pond is back to aeration tank to provide strain for aeration tank, and remaining sludge enters follow-up Treatment of Sludge system
System；The sewage for accounting for sewage total amount 30% then enters anoxic pond as the second tunnel, and carbon source is provided for denitrification denitrogenation；
3）Sewage after being handled through anoxic pond denitrification enters Aerobic Pond and carries out Air Exposure, further removes COD and ammonia
Nitrogen；
4）Mixed liquor in Aerobic Pond is divided into two-way, and the first via is back to anoxic pond and carries out denitrification processing, reflux ratio control
It is made as the 150% of inflow；Second tunnel enter the second sedimentation basin carry out mud-water separation, the supernatant qualified discharge of the second sedimentation basin,
A sludge part for second sedimentation basin is back to anoxic pond, and another part sludge enters follow-up sludge treating system；
5）Transported after the concentrated dehydration of sludge in sludge treating system；
Wherein, aeration tank hydraulic detention time is 3 hours, and anoxic pond hydraulic detention time is 3 hours, and aerobic tank waterpower stops
It is 10 hours to stay the time.Sludge concentration is 4000 mg/litres in aeration tank, and anoxic pond and Aerobic Pond sludge concentration are 3200 millis
G/l.First sedimentation basin, the sludge reflux rate of the second sedimentation basin are 80%, and the first sedimentation basin, the surface of the second sedimentation basin are born
Lotus is 0.8 cubic metre/square meters per hour.
As shown in figure 1, a kind of system that integrated high-efficiency decarburization denitrogenation dephosphorizing is carried out using above-mentioned technique, it includes sludge
Processing system 7 and the grid regulating reservoir 1 being sequentially connected with, aeration tank 2, the first sedimentation basin 3, anoxic pond 4, Aerobic Pond 5 and second
Sedimentation basin 6；Outlet of the upper end of the anoxic pond 4 also with grid regulating reservoir 1 is connected, and the upper end of the Aerobic Pond 5 is also with lacking
The upper end in oxygen pond 4 is connected；The pipeline of the outlet at bottom of first sedimentation basin 3 is divided into two branch roads, one of them and aeration tank 2
Bottom be connected, another is connected with sludge treating system 7；The pipeline of the outlet at bottom of second sedimentation basin 6 is divided into two
Individual branch road, one of them is connected with the bottom of anoxic pond 4, and another is connected with sludge treating system 7.The aeration tank 2
Bottom is provided with the first airduct 9 being connected with the first air blower 10, and the bottom of Aerobic Pond 5 is provided with to be connected with the second air blower 15
Two ends in the second logical airduct 14, the anoxic pond 4 are provided with the first agitator 12 and the second agitator 13.
In Fig. 1, band arrow solid line is water (flow) direction line, and band arrow dotted line is sludge flow line.Treatment sewage enters to accord with regular rules
In grid regulating reservoir 1, after being lifted through the first pump 8, it is divided into two-way.The first via enters in aeration tank 2 through pipeline, and the first air blower 10 will
Air is blasted by the first airduct 9 and is aerated in aeration tank 2（Heterotroph is dominant in the pond, with very strong adsorption capacity,
In the case where heterotrophic microorganism acts on, organic matter is effectively removed）, enter the first sedimentation basin 3 through piping again after aeration and carry out mud
Water is separated, and the precipitating sludge that the supernatant in the first sedimentation basin 3 enters in anoxic pond 4, the first sedimentation basin 3 through pipeline is through the second pump
11 lifting rear portions are back in aeration tank 2, and another part enters sludge treating system 7 through pipeline.Second tunnel is straight through pipeline
Tap into anoxic pond 4（Carbon source is provided for denitrification denitrogenation and dephosphorization, and can further degradable organic pollutant）, stirred first
Mixing muddy water in the presence of device 12, the second agitator 13, to be sufficiently mixed denitrification effect good, then enters through pipeline in Aerobic Pond 5.The
Air is blasted and is aerated in Aerobic Pond 5 by two air blowers 15 by the second airduct 14（Sufficient nitration reaction）, in Aerobic Pond 5
A mixed liquor part lifted through the 3rd pump 16, be back in anoxic pond 4 progress denitrification processing along pipeline, another part is through pipe
Road, which enters, carries out mud-water separation in sedimentation basin 6.Precipitating sludge in supernatant qualified discharge in sedimentation basin 6, sedimentation basin 6 is the 4th
In the presence of pump 17, a part is back in anoxic pond 4 through pipeline, and another part enters sludge treating system 7 through pipeline.Into
Precipitating sludge in sludge treating system 7 carries out sludge outward transport after thickening.
The first blower fan 10 is connected in aeration tank 2 by the first airduct 9 to carry out passing through the second wind in blast aeration, Aerobic Pond 5
Pipe 14 connects the second blower fan 15 and carries out blast aeration.Here the first airduct 9 and the second airduct 14, the first blower fan 10 and the second blower fan
15 belong to equipment of the same race, but for different situations, model can be different.It is aeration tank 2, the first sedimentation basin 3, anoxic pond 4, aerobic
Pond 5, the liquid level of the second sedimentation basin 6 arrange that gravity flow can be achieved in sewage in pond from high to low successively, save the energy and power.Its
In, sludge treating system 7 is mainly used in the concentration and dehydration of excess sludge, is transported through discharge pipeline, is prior art, so not
Repeat again.
For the sanitary sewage of high concentration（Raw water COD 516-612mg/L, ammonia nitrogen 54.1-68.8mg/L, SS 80-
160mg/L）, handled using above-mentioned technique, biochemistry pool（That is aeration tank, anoxic pond and Aerobic Pond）Total hrt is protected
Hold in 12-15h, water outlet COD is stable in below 50mg/L, and ammonia nitrogen is in below 2mg/L, and SS is met in below 9mg/L
GB18918-2002《Urban wastewater treatment firm pollutant emission standard》In one-level A standards, it is and stable.
For leather-making waste water, after Anaerobic Treatment, COD exists in 420-725mg/L, ammonia nitrogen in 49.3-68.2mg/L, SS
215-346mg/L, is further handled, biochemistry pool using above-mentioned technique（That is aeration tank, anoxic pond and Aerobic Pond）Total hydraulic retention
Time is about 18h, and water outlet COD is stable in 67-94mg/L, and ammonia nitrogen is in 9.2-14.5mg/L, and SS is met in 9-23mg/L《It is dirty
Water comprehensive discharge standard》（GB8978-1996）In primary standard, it is and stable.
Claims (2)
1. a kind of integrated high-efficiency decarburization denitrification dephosphorization technique, it is characterised in that comprise the following steps：
1）Pending sewage is introduced into grid regulating reservoir；
2）Sewage in grid regulating reservoir is divided into two-way, accounts for sewage total amount 50-80% sewage as the first via and enters aeration tank,
Enter the first sedimentation basin after being aerated in aeration tank and carry out mud-water separation, the supernatant of the first sedimentation basin enters anoxic pond, and first sinks
The sludge part in shallow lake pond is back to aeration tank, and remaining sludge enters follow-up sludge treating system；Account for sewage total amount 20-50%
Sewage then enter anoxic pond as the second tunnel, provide carbon source for denitrification denitrogenation；
3）Sewage after being handled through anoxic pond denitrification enters Aerobic Pond and carries out Air Exposure, further removes COD and ammonia nitrogen；
4）Mixed liquor in Aerobic Pond is divided into two-way, and the first via is back to anoxic pond and carries out denitrification processing, and reflux ratio control is
The 100-200% of inflow；Second tunnel enters the second sedimentation basin and carries out mud-water separation, the supernatant row up to standard of the second sedimentation basin
Put, a sludge part for the second sedimentation basin is back to anoxic pond, and another part sludge enters follow-up sludge treating system；
5）Transported after the concentrated dehydration of sludge in sludge treating system.
2. integrated high-efficiency decarburization denitrification dephosphorization technique as claimed in claim 1, it is characterised in that during the hydraulic retention of aeration tank
Between be 2-4 hour, anoxic pond hydraulic detention time be 2-4 hours, Aerobic Pond hydraulic detention time be 8-12 hours；Aeration
Sludge concentration is 3800-4200 mg/litres in pond, and anoxic pond and Aerobic Pond sludge concentration are 3000-3500 mg/litres；
First sedimentation basin, the sludge reflux rate of the second sedimentation basin are 50-100%, the first sedimentation basin, the surface loading of the second sedimentation basin
It is 0.7-1.0 cubic metre/square meters per hours.
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| US7172699B1 (en) * | 2004-10-13 | 2007-02-06 | Eimco Water Technologies Llc | Energy efficient wastewater treatment for nitrogen and phosphorus removal |
| CN101723554B (en) * | 2009-12-31 | 2011-09-28 | 华南理工大学 | Chemical fertilizer waste water treatment method |
| CN103241904B (en) * | 2013-05-24 | 2014-08-27 | 郑州大学 | Multi-point water inlet aeration anoxic-aerobic high-efficient nitrogen and phosphorus removal method |
| CN204689726U (en) * | 2015-05-27 | 2015-10-07 | 郑州大学 | Integrated high-efficiency decarburization denitrification dephosphorization system |
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