CN105906052A - Coupling anaerobic sludge acidogenesis mud-film two-phase composite A/A/O system and technology - Google Patents
Coupling anaerobic sludge acidogenesis mud-film two-phase composite A/A/O system and technology Download PDFInfo
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- CN105906052A CN105906052A CN201610407114.7A CN201610407114A CN105906052A CN 105906052 A CN105906052 A CN 105906052A CN 201610407114 A CN201610407114 A CN 201610407114A CN 105906052 A CN105906052 A CN 105906052A
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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
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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Abstract
The invention discloses a coupling anaerobic sludge acidogenesis mud-film two-phase composite A/A/O system and technology. The system comprises an anaerobic sludge acidogenesis subsystem and a Hybrid-A/A/O subsystem. The anaerobic sludge acidogenesis subsystem comprises a sludge thickening tank, an anaerobic sludge acidogenesis tower, a medicine adding mixing tank, a sludge filter press and a liquid storage tank. The Hybrid-A/A/O subsystem comprises an anaerobic tank, an anoxia tank, an aerobic tank and a sedimentation tank, wherein biological stuffing in the anaerobic tank is solid biological stuffing; biological stuffing in the aerobic tank is suspended biological stuffing; the liquid storage tank is communicated with the anaerobic tank; the sedimentation tank is communicated with the sludge concentration tank through a pipeline. According to the coupling anaerobic sludge acidogenesis mud-film two-phase composite A/A/O system and technology, carbon source distribution and complementation, sludge reduction and nitrogen and phosphorus removal performance are intensified and organically combined, the problems that the outlet water quality is not stable, the excess sludge yield is large and the processing cost is high are solved, and the outlet water obtained after low-carbon-source urban sewage treatment stably reaches the emission standard.
Description
Technical field
The invention belongs to sewage and sludge treating system and technique, especially a kind of
Coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
(Anaerobic-Anoxic-Aerobic, anaerobic-anoxic-oxic method) system and technique.
Background technology
Municipal sewage plant is controlling water pollution, is improving water body environment, promotion China's economic
Sustainable development aspect has played extremely important effect.But, along with environmental requirement more comes
The highest, the standard of Urban Water Pollution Control is tighter, and municipal sewage plant is also faced with
Challenge.
Urban wastewater treatment firm pollutant emission standard is tighter, especially to the nutrient such as nitrogen, phosphorus
Removal has had and has clearly required, and the requirement to sewage effluents stably reaching standard is the highest, and big portion
Point built effluent of municipal sewage plant nitrogen phosphorus cannot stably reaching standard (GB18918-2002).One
Aspect, pipeline network construction relatively lags behind, and south amount of rainfall is big, and rain dirt shunting is not fully achieved
Reason, makes many Small Urbans Sewage Plant water-inlet carbon source not enough, water inlet total phosphorus more than 4-5mg/L,
BOD5/ TKN (TKN, total kjeldahl nitrogen, total nitrogen) ratio is far below 5-8,
The organic carbon source of abundance cannot be provided for denitrogenation dephosphorizing.On the other hand, the city of domestic more than 80%
Sewage treatment plant of city uses activated sludge process, and activated sludge process exists inborn deficiency,
I.e. denitrogenation, dephosphorization flora inconsistent to the requirement of sludge age, both floras be in
The problem that nitrogen, phosphorus ligands cannot be taken into account often occurs in one phase.Therefore, sludge age demand lance
Shield and low-carbon-source result in nitrogen in sewage effluents, phosphorus cannot stably reaching standard.
Carbon source deficiency, defective workmanship and Cost Problems make municipal sewage plant in actual operation
During technique cannot stablize, anti impulsion load is indifferent, and water outlet nitrogen phosphorus is extremely difficult to one-level
Emission standard A, this directly results in sewage treatment plant's high cost fallback.
Municipal sewage plant's daily requirement processes substantial amounts of fog, produces substantial amounts of excess sludge,
And the process of excess sludge disposes difficulty greatly, costly, its processing cost accounts for sewage treatment plant
The 35～60% of overall running cost, this adds substantial amounts of operation cost to Sewage Plant.
China Patent No. 201210285691.5 and CN104118971A uses mud product acid to be used as
Supplementary carbon source strengthening nitrogen phosphorus ligands, realizes reducing sludge yield simultaneously.These technology only account for
Mud increases carbon source after producing acid, and after not considering that fermentation liquid adds, pollutant burden raises work
Property sludge system and the impact of effluent quality, when reality is applied, state modulator difficulty is big.
The technology of biological membrane such as new technology such as MBBR, IFAS only consider the sludge age demand of nitrogen phosphorus ligands
Contradiction and system tolerance load impact ability, but do not take into account water-inlet carbon source this root not enough
This sex chromosome mosaicism.
Summary of the invention
In order to solve above-mentioned technical problem, the present invention provides one to be adapted to low carbon source urban sewage
Processing system and technique, thus going out of solving that current Sewage Plant faces water quality is unstable, residue dirt
The problem that mud yield is big and processing cost is high.The technical solution used in the present invention is:
A kind of sludge anaerobic that couples produces the biphase compound A/A/O system of mud film of acid, including:
Sludge anaerobic produces acid subsystem, including: sludge concentration tank, sludge anaerobic produce acid tower, add
Medicine mixing pit, sludge filter press and liquid storage tank；Described sludge concentration tank, sludge anaerobic product acid tower,
Dosing mixing pit, sludge filter press and liquid storage tank are sequentially connected with；
Hybrid-A/A/O subsystem, including: anaerobic pond, anoxic pond, Aerobic Pond and sedimentation tank；
Described anaerobic pond, anoxic pond, Aerobic Pond and sedimentation tank are sequentially communicated；In wherein said anaerobic pond
Biologic packing material be fixed type biological filler；Biologic packing material in described Aerobic Pond is floated life
Thing filler；
Wherein said liquid storage tank connects with anaerobic pond；Described sedimentation tank and sludge concentration tank are by pipe
Road connects.
Further, described sludge concentration tank is provided with sludge concentration meter and submersible sewage pump.
Further, the sludge concentration of described sludge concentration tank is at 20000mg/L～30000mg/L
Between.
Further, described sludge anaerobic produces and is provided with heat-insulation layer outside acid tower.
Further, described sludge anaerobic is additionally provided with pushing flow mixer, pH meter, surpasses in producing acid tower
Sonic liquid-level meter, add alkali dosing pump and sludge pump, described pushing flow mixer, pH meter, ultrasound wave
Liquidometer, add alkali dosing pump and sludge pump is all controlled by PLC.
Further, described sludge anaerobic produce the pH in acid tower be 10-12, SRT be 6-10
My god.
Further, described dosing mixing pit is additionally provided with agitator.
Further, described dosing mixing pit is connected by mud membrane pump with sludge filter press.
Further, described liquid storage tank is additionally provided with immersible pump, for by the fermentation in liquid storage tank
Liquid causes anaerobic pond.
Further, described fixed type biological filler front end is provided with deflector, described deflector with
Horizontal sextant angle at the bottom of anaerobic pond pond is 30 °～60 °.
Further, the volume of described suspending type biological filler is the 5%-50% that aerobic cell body is long-pending,
The density of suspending type biological filler is about 0.98-0.99g/cm3。
Further, the suspended sludge concentration in described anaerobic pond and Aerobic Pond be 2000～
4000mg/L。
Further, described Aerobic Pond is additionally provided with impeller and aerator；Described Aerobic Pond
Outlet is additionally provided with water outlet screen cloth, and wherein the diameter of water outlet screen cloth is less than suspending type biological filler
Diameter.
Further, it is provided with reflux line between described Aerobic Pond and anoxic pond.
Further, it is provided with sludge return pipe between described sedimentation tank and anaerobic pond.
A kind of sludge anaerobic that couples produces the biphase compound A/A/O technique of mud film of acid, processing step bag
Include:
S1, the excess sludge of Hybrid-A/A/O subsystem is drained into sludge concentration tank；
S2, by sludge concentration tank muddy water mixed solution introduce sludge anaerobic produce acid tower, pass through PLC
Controlling pH, the SRT in anaerobic acid-production tower and suitable mixing speed, muddy water mixed solution exists
Sludge anaerobic produces anaerobic acid-production in acid tower；
S3, sludge anaerobic is produced acid tower discharge muddy water mixed solution introduce dosing mixing pit, adding
Add the calcium salt of certain mass concentration, iron salt or aluminium salt in medicine mixing pit, and stirred by agitator
A small amount of flocculant is added after reaction；
S4, the water outlet of dosing mixing pit is introduced sludge filter press, by the water outlet of dosing mixing pit
Fermentation liquid produced by after filter pressing enters liquid storage tank and continues to employ；
S5, the fermentation liquid in liquid storage tank is evacuated to anaerobic pond water inlet, fermentation liquid and water inlet by than
Entrance anaerobic pond after example mixing, when the mixed liquor of fermentation liquid and water inlet stops one section in anaerobic pond
Between occur after anaerobic phosphorus release effect, the water outlet of anaerobic pond is introduced anoxic pond；
S6, in anoxic pond, the water outlet of anaerobic pond and the nitrification liquid of backflow are sufficiently mixed generation and lack
Aerobic Pond is entered after oxygen Denitrification；
S7, in Aerobic Pond, biomembrane on suspended biological filler utilizes and produces in anaerobic pond
PHB and dissolved oxygen generation aerobic phosphorus absorption effect, the ammonia nitrogen in water is converted by nitration reaction
Becoming nitrate nitrogen, dephosphorization function is mainly completed by the suspended sludge in pond；
S8, by remaining water outlet introduce sedimentation tank, water with precipitation after mud separate after row up to standard
Put；Excess sludge part drains into sludge concentration tank, outside another part mud is after pressure filter processes
Row, remaining mud is then back to anaerobic pond.
The biomembrane on fixed type biological filler in anaerobic pond can graininess in trap water organic
Thing, fully excavates and make use of into the useful carbon source in water, by the water of fixed type biological filler
Solve acidization and graininess Organic substance is changed into the Organic substance of little molecule, improve influent COD
Influent quality is also improved while (Chemical Oxygen Demand, COD)
Condition, suspended sludge may utilize deliquescent small organic molecule generation anaerobic phosphorus release in water body and makees
With, the beneficially removal of system phosphorus.
Suspending type biological filler in Aerobic Pond makes nitration reaction and part anti-nitration reaction concentrate on
On the biomembrane of suspended biological filler, inhale phosphorus effect and mainly completed by the suspended sludge in pond, solve
Determine dephosphorization and the denitrogenation demand lance to SRT (Sludge Retention Time, sludge age)
Shield, it is achieved that good nitrogen phosphorus ligands effect, and avoid because spoil disposal too much causes ammonia nitrogen
The problem that treatment effect is bad.
In Hybrid-A/A/O subsystem on fixed type biological filler and suspending type biological filler
Biomembranous existence, makes to there is mud phase and biomembrane phase in Hybrid-A/A/O subsystem simultaneously
Two kinds of forms, improve the load resistance performance of system, solve because addition fermentation liquid makes pollutant
The problem that load rises and affects effluent quality effect, it is ensured that the stability of system effluent quality.
The water inlet of Hybrid-A/A/O subsystem is by producing after Hybrid-A/A/O subsystem processes
Some residual mud drain into sludge concentration tank, some residual mud is at anaerobic acid-production system
Obtain the alkaline broth rich in VFAs after reason, decrease the dirt of Hybrid-A/A/O subsystem
Mud discharge capacity, saves Treatment of Sludge expense.Meanwhile, mud is at Hybrid-A/A/O subsystem
In biologic packing material biomembrane on also can autoxidation and realize process mud decrement.By described
Rich in VFAs alkaline broth with water inlet mix after entering as Hybrid-A/A/O subsystem
Water, can be as the excellent supplementary carbon source of dephosphorization so that Hybrid-A/A/O subsystem has well
Anaerobic phosphorus release and aerobic phosphorus absorption function, it is achieved good TP (total phosphorus, always
Phosphorus) removal effect.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film and the technique of acid
Carbon source distribution is organically combined with supplementary, mud decrement, denitrogenation dephosphorizing hydrodynamics,
Solve the problem that effluent quality is unstable, excess sludge production is big and processing cost is high, make low
Stable water outlet after carbon source municipal sewage treatment reaches discharge standard.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below
By the accompanying drawing used required in embodiment or description of the prior art is briefly described, aobvious and easy
Insight, the accompanying drawing in describing below is only some embodiments of the present invention, general for this area
From the point of view of logical technical staff, on the premise of not paying creative work, it is also possible to attached according to these
Figure obtains other accompanying drawing.
Fig. 1 produces acid subsystem schematic diagram for inventing described sludge anaerobic；
Fig. 2 is for inventing described Hybrid-A/A/O subsystem (Hybrid
Anaerobic-Anoxic-Oxic, composite anaerobic-anaerobic-aerobic method) schematic diagram；
Reference is: 1-sludge concentration tank；2-sludge concentration meter；3-submersible sewage pump；4-sludge anaerobic
Produce acid tower；5-heat-insulation layer；6-pushing flow mixer；7-pH counts；8-ultrasonic level gage；9-counts
Amount pump；10-sludge pump；11-dosing mixing pit；12-agitator；13-mud membrane pump；14-
Sludge filter press；15-liquid storage tank；16-immersible pump；17-anaerobic pond；18-fixed type biological is filled out
Material；19-deflector；20-anoxic pond；21-Aerobic Pond；22-submersible water impeller；23-is floated
Biologic packing material；24-water outlet screen cloth；25-aerator；26-sedimentation tank.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the embodiment of the present invention and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe wholely.Implement it should be noted that described embodiment is only a part of the present invention
Example rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not paying creative work premise, broadly falls into
The scope of protection of the invention.
The detailed description of the invention of the present invention is described below in conjunction with the accompanying drawings.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film of acid and includes dirt
Mud anaerobic acid-production subsystem and Hybrid-A/A/O subsystem.It is illustrated in figure 1 sludge anaerobic to produce
The schematic diagram of acid subsystem, including sludge concentration tank 1, sludge anaerobic produces acid tower 4, and dosing mixes
Pond 11, sludge filter press 14 and liquid storage tank 15；Described sludge concentration tank 1, sludge anaerobic produce
Acid tower 4, dosing mixing pit 11, sludge filter press 14 and liquid storage tank 15 are sequentially communicated.
It is illustrated in figure 2 Hybrid-A/A/O subsystem schematic diagram, including anaerobic pond 17, lacks
Oxygen pond 20, Aerobic Pond 21 and sedimentation tank 26；Described anaerobic pond 17, anoxic pond 20, Aerobic Pond
21 and sedimentation tank 26 be sequentially communicated.
Described sedimentation tank 26 and sludge concentration tank 1 are by pipeline communication, and being used for will
The some residual mud that Hybrid-A/A/O subsystem produces drains into sludge concentration tank 1.
The some residual mud of Hybrid-A/A/O subsystem drains into sludge concentration tank 1, excess sludge warp
Cross the available alkaline broth rich in VFAs after anaerobic acid-production system processes, decrease
The sludge discharge of Hybrid-A/A/O subsystem, saves Treatment of Sludge expense.
As preferably, described sludge concentration tank 1 is provided with sludge concentration meter 2 and submersible sewage pump 3,
Described sludge concentration meter 2 for monitor and keep sludge concentration tank 1 sludge concentration (TSS,
Total Suspended Solid), as preferably, the sludge concentration of described sludge concentration tank 1
Between 20000mg/L～30000mg/L.Muddy water mixed solution in sludge concentration tank 1 is through institute
State submersible sewage pump 3 and be promoted to the water inlet of sludge anaerobic product acid tower 4 upper end.
Muddy water mixed solution produces acid tower 4 anaerobic acid-production, as preferably, described mud at sludge anaerobic
Anaerobic acid-production tower is additionally provided with pH meter 7, ultrasonic level gage 8, adds alkali dosing pump 9 and mud
Pump 10, described pushing flow mixer 6, pH meter 7, ultrasonic level gage 8, adds alkali dosing pump 9
With sludge pump 10 all by PLC (Programmable Logic Controller, able to programme
Logic controller) control, for control sludge anaerobic produce the pH in acid tower 4, mixing speed and
Liquid level.As preferably, described sludge anaerobic produces the pH in acid tower 4 between 10-12,
SRT (sludge age) is 6-10 days.As preferably, described sludge anaerobic produces acid tower 4 outside and sets
Heat-insulation layer 5, the material of heat-insulation layer 5 is had to include but are not limited to asbestos.Heat-insulation layer 5 is in order to protect
Holding sludge anaerobic and produce the temperature in acid tower 4, as preferably, sludge anaerobic produces the temperature in acid tower 4
Degree is not less than 15 DEG C.
Sludge anaerobic produces the water outlet of acid tower 4 and is evacuated to dosing mixing pit 11 through sludge pump 10, makees
For preferably, described dosing mixing pit 11 is provided with agitator 12.Press in dosing mixing pit 11
Volume ratio adds calcium salt, iron salt or aluminium salt, by agitator 12 stirring reaction, and is reacting
Adding a small amount of flocculant in Bi Houxiang dosing mixing pit 11, flocculant includes but not limited to polypropylene
Amide.
As preferably, described dosing mixing pit 11 and described sludge filter press 14 by mud every
Membrane pump 13 connects.Water outlet in dosing mixing pit 11 is evacuated to sludge press filtration by mud membrane pump 13
Machine 14, the water outlet in dosing mixing pit 11 produce after sludge filter press 14 filter pressing rich in
The alkaline broth of VFAs, fermentation liquid drains into described liquid storage tank 15 and continues to employ.Described liquid storage tank 15
Connect with anaerobic pond 17, as preferably, described liquid storage tank 15 is additionally provided with immersible pump 16, use
In the fermentation liquid in liquid storage tank 15 is evacuated to anaerobic pond 17.
The described alkaline broth rich in VFAs and water inlet enter anaerobic pond 17 after being mixed in proportion,
As preferably, the volume ratio of described fermentation liquid and water inlet is between 1:40～1:200.Fermentation liquid
Entering described Hybrid-A/A/O subsystem with the mixed liquor of water inlet, the alkalescence rich in VFAs is sent out
Ferment liquid can be as the excellent supplementary carbon source of dephosphorization so that Hybrid-A/A/O subsystem has well
Anaerobic phosphorus release and aerobic phosphorus absorption function, it is achieved good TP removes.
Biologic packing material in described anaerobic pond 17 is fixed type biological filler 18, described fixed
Biologic packing material 18 includes but are not limited to 3 D elastic filler, combined stuffing, gimp formula filler.
As preferably, described fixed type biological filler 18 front end is provided with deflector 19, described deflector
19 with anaerobic pond 17 pond at the bottom of horizontal sextant angle be 30 °-60 °, the bootable fermentation liquid of deflector 19
With the mixed liquor of water inlet, fixed type biological filler 18 is washed away, accelerate fixed type biological and fill out
Biomembranous renewal on material 18.
As preferably, the concentration of the suspended sludge in described anaerobic pond 17 be 2000～
4000mg/L.Biomembrane on fixed type biological filler 18 and suspended sludge with mud film compound two
Phase form exists jointly, and the biomembrane on fixed type biological filler 18 can retain and adsorb in water
Graininess Organic substance, fully excavates and make use of into the useful carbon source in water, by fixed life
Graininess Organic substance is changed into available deliquescent little point by the hydrolysis acidification effect of thing filler
Sub-Organic substance, also improves influent quality condition, suspended sludge while improve influent COD
Deliquescent small organic molecule generation anaerobic phosphorus release effect in available water body, beneficially system
The removal of phosphorus.
As preferably, the mixed liquor of fermentation liquid and water inlet hydraulic detention time in anaerobic pond 17
For 2-3h.The mixed liquor of fermentation liquid and water inlet enters anoxic pond 20 after reacting in anaerobic pond 17,
Anoxic denitrification effect is there is in the water outlet of anaerobic pond 17 and the nitrification liquid of backflow in anoxic pond 20
Rear entrance Aerobic Pond 21.
Biologic packing material in described Aerobic Pond 21 is suspending type biological filler 23.As preferably,
The 5%-50% that loading is Aerobic Pond 21 volume of described suspending type biological filler 23, floated
The density of biologic packing material 23 is close to water, for 0.98-0.99g/cm3.As preferably, described good
Oxygen pond 21 is additionally provided with impeller 22 and aerator 25；Impeller 22 can promote floated life
The flowing of thing filler 23, accelerates the renewal of suspending type biological filler 23 surface biological film；Described
Aerator 25 provides dissolved oxygen for Nitrification.
Described suspending type biological filler 23 and suspended sludge are common with the biphase form that mud film is compound
Exist, utilize anaerobic phosphorus release in anaerobic pond 17 to store sufficient PHB
The dissolved oxygen that (poly-β-hydroxybutyrate, poly-β-hydroxybutyric acid) and aerator 25 provide occurs
Aerobic phosphorus absorption effect, the biomembrane on the suspending type biological filler 23 of flowing fully adsorbs in water
Ammonia nitrogen also changes into nitrate nitrogen by Nitrification；And it is mainly dirty by the suspension in pond to inhale phosphorus effect
Mud completes, and solves dephosphorization and the denitrogenation demand contradictory to SRT, it is achieved good nitrogen phosphorus ligands
Effect, avoids the problem that the NH_3-N treating effect caused because spoil disposal is too much is bad simultaneously.Make
For preferably, the outlet of described Aerobic Pond 21 is additionally provided with water outlet screen cloth 24, and described in go out water sieve
The diameter of net 24 is less than the diameter of suspending type biological filler 23, and water outlet screen cloth 24 can retain sewage
In suspending type biological filler 23, remaining mud along with sewage enter sedimentation tank 26.
Described in Hybrid-A/A/O subsystem, fixed type biological filler 18 and suspending type biological are filled out
Biomembrane on material 23 and suspended sludge all exist jointly with the biphase form that mud film is compound, improve
The load resistance performance of system, solves and makes pollutant burden increase and affect because adding fermentation liquid
The problem of effluent quality effect, it is ensured that the stability of system effluent quality.Exist simultaneously
In Hybrid-A/A/O subsystem, mud also can be in fixed type biological filler 18 and floated life
Autoxidation on biomembrane on thing filler 23 and realize process mud decrement.
As preferably, between described Aerobic Pond 21 and anoxic pond 20, it is provided with reflux line, incite somebody to action
The nitrification liquid of the generation in oxygen pond 21 is partly refluxed to described anoxic pond 20, can improve anoxic pond 20
Sludge concentration, nitrate nitrogen occurs anoxic denitrification effect can reduce in sewage in anoxic pond 20
TN (total nitrogen, total nitrogen), keep the basicity of water outlet simultaneously.As preferably,
Described mixed liquid recycle ratio is 50%-400%.
The water outlet of Aerobic Pond 21 drains into sedimentation tank 26.As preferably, described sedimentation tank 26 with detest
It is provided with sludge return pipe between oxygen pond 17.In sedimentation tank 26, going out after separating with mud
Water qualified discharge, a part of excess sludge bottom sedimentation tank 26 discharges with the form of biological sludge
To sludge concentration tank 1, another part mud directly outer row, remaining mud after pressure filter processes
Then it is back to anaerobic pond 17 through sludge return pipe, increases the suspended sludge in anaerobic pond 17
Concentration, promotes the growth of microorganism.
Excess sludge enters sludge anaerobic after concentrating in sludge concentration tank and produces acid tower, excess sludge
After anaerobic acid-production system processes, obtain the alkaline broth rich in VFAs, decrease
The sludge discharge of Hybrid-A/A/O subsystem, saves Treatment of Sludge expense.Meanwhile, dirty
Mud fixed type biological filler in Hybrid-A/A/O subsystem and suspending type biological filler
On biomembrane also can autoxidation and realize process mud decrement.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film of acid by carbon source
Distribute and organically combine with supplementary, mud decrement and denitrogenation dephosphorizing hydrodynamics, solve
The problem that effluent quality is unstable, excess sludge production is big and processing cost is high, it is achieved low-carbon-source
The purpose of stable water outlet after sewage disposal, makes water outlet stably reach discharge standard.
Coupling sludge anaerobic of the present invention produces the concrete of the biphase compound A/A/O technique of mud film of acid
Step is as follows:
S1, the excess sludge of Hybrid-A/A/O subsystem is drained into sludge concentration tank, keep dirt
Sludge concentration in mud thickener is between 20000mg/L～30000mg/L；
S2, by sludge concentration tank muddy water mixed solution introduce sludge anaerobic produce acid tower, keep dirt
Temperature in mud anaerobic acid-production tower is not less than 15 DEG C, is controlled in anaerobic acid-production tower by PLC
PH=10～12, SRT=6～10 days and suitable mixing speed, muddy water mixed solution is detested at mud
Oxygen produces anaerobic acid-production in acid tower；
S3, sludge anaerobic is produced acid tower discharge muddy water mixed solution introduce dosing mixing pit, adding
Add, according to the volume ratio of 1:50～1:100, calcium salt, the ferrum that mass concentration is 5% in medicine mixing pit
Salt or aluminium salt, and by agitator stirring reaction 30～60min；Add a small amount of matter after completion of the reaction
Amount concentration is the flocculant of 2 ‰；
S4, the water outlet of dosing mixing pit is introduced sludge filter press, by the water outlet of dosing mixing pit
Fermentation liquid produced by after filter pressing enters liquid storage tank and continues to employ；
S5, the fermentation liquid in liquid storage tank being evacuated to anaerobic pond water inlet, body is pressed in fermentation liquid and water inlet
1:40～the 1:200 mixing of long-pending ratio, and the mixed liquor of fermentation liquid and water inlet is introduced anaerobic pond, send out
The mixed liquor of ferment liquid and water inlet hydraulic detention time in anaerobic pond is 2～3h；By anaerobic pond
In suspended sludge concentration control 2000～4000mg/L；Suspended sludge in anaerobic pond occurs
After anaerobic phosphorus release effect, the water outlet of anaerobic pond is introduced anoxic pond；
S6, in anoxic pond, the water outlet of anaerobic pond and the nitrification liquid of backflow are sufficiently mixed generation and lack
Aerobic Pond is entered after oxygen Denitrification；
S7, the suspended sludge concentration in Aerobic Pond is controlled 2000～4000mg/L, Aerobic Pond
In the loading of suspending type biological filler be the long-pending 5%-50% of aerobic cell body, the density of filler connects
It is bordering on water, about 0.98-0.99g/cm3；Biology in Aerobic Pond, on suspended biological filler
Film utilizes the PHB and dissolved oxygen generation aerobic phosphorus absorption effect produced in anaerobic pond, by water
Ammonia nitrogen changes into nitrate nitrogen by nitration reaction, inhales phosphorus effect mainly complete by the suspended sludge in pond
Become；
S8, the nitrification liquid that Aerobic Pond produces being partly refluxed to anoxic pond, mixed liquid recycle ratio is protected
Hold at 50%-400%；Remaining water outlet is introduced sedimentation tank, after water separates with the mud after precipitation
Qualified discharge；An excess sludge part drains into sludge concentration tank, and another part mud is through pressure filter
Discharging system after process, remaining mud is then back to anaerobic pond.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film and the technique of acid
Use sanitary sewage to carry out sewage disposal in municipal sewage plant of Guangdong Province, system is run
Nearly 8 months, carrying out practically situation was described below with result:
1) control system sludge concentration is 20000～30000mg/L, SRT=10d, pH=10.50,
Dissolved organic matter (SCOD, Soluble Chemical Oxygen Demand) is than producing speed
Rate can reach 511.4mg COD (g VSS)-1.In fermentation liquid, VFAs-COD accounts for SCOD's
Proportion is relatively big, average accounting 73.89%, and this result is higher than other homogeneous system 2%～15%,
Sludge anaerobic produces acid subsystem can realize good product acid effect.Fermentation liquid VFAs forms into
In Fen, acetic acid and propanoic acid are main component, account for respectively the proportion of VFAs be 51.43%,
20.98%, it is also higher than existing homogeneous system result, the excess sludge of system can realize decrement
33.5%.
(2) join supplementary for the ratio of fermentation liquid and sewage 1:180 by volume
In the water inlet of Hybrid-A/A/O subsystem, Hybrid-A/A/O anaerobic pond internally-fixed biology is filled out
Material volume packing ratio is 30%, and Aerobic Pond suspended biological filler packing ratio is 20%, controls feed water flow
Amount is 2.4m3/ d, mixed liquid recycle ratio is 100%, and return sludge ratio is 50%, sludge age be 6～
8 days, COD, NH4-N, TN, TP of Inlet and outlet water were as shown in table 1 below.
Table 1: COD, NH of Inlet and outlet water4-N, TN, TP content
From table 1, under the conditions of low influent COD, detest through coupling mud of the present invention
After oxygen produces the biphase compound A/A/0 system of mud film and the PROCESS FOR TREATMENT of acid, water outlet can stably reach out
Water discharge one-level A standard (GB18918-2002).Ammonia Nitrification be mainly distributed on mud mutually in,
And biomembrane also has bigger contribution (30%) relative to Ammonia Nitrification；TP remove be the most all by
Mud in system completes mutually.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film of acid and includes detesting
Oxygen produces acid system and Hybrid-A/A/O subsystem；Wherein said anaerobic acid-production system includes mud
Concentration basin, sludge anaerobic produces acid tower, dosing mixing pit, sludge filter press and liquid storage tank；Described
Hybrid-A/A/O subsystem includes anaerobic pond, anoxic pond, Aerobic Pond and sedimentation tank.
Biologic packing material in anaerobic pond is fixed type biological filler, the life on fixed type biological filler
Thing film can retain and adsorb the graininess Organic substance in water, fully excavates and make use of in water
Useful carbon source, is converted graininess Organic substance by the hydrolysis acidification effect of fixed type biological filler
Become available deliquescent small organic molecule, also improve while improve influent COD
Influent quality condition, suspended sludge may utilize deliquescent small organic molecule in water body to be detested
Oxygen releases phosphorus effect, the beneficially removal of system phosphorus.
Biologic packing material in Aerobic Pond is suspending type biological filler, the suspending type biological filler of flowing
On biomembrane utilize anaerobic phosphorus release in anaerobic pond to store sufficient PHB and aerator provides
Dissolved oxygen generation aerobic phosphorus absorption effect, is fully adsorbed the ammonia nitrogen in water and is converted by Nitrification
Become nitrate nitrogen；And inhale phosphorus effect and mainly completed by the suspended sludge in pond, solve dephosphorization with de-
The nitrogen demand contradictory to SRT, it is achieved good nitrogen phosphorus ligands effect, avoids because of spoil disposal simultaneously
The problem that the NH_3-N treating effect that too much causes is bad.
In Hybrid-A/A/O subsystem on fixed type biological filler and suspending type biological filler
Biomembranous existence, makes to there is mud phase and biomembrane phase in Hybrid-A/A/O subsystem simultaneously
Two kinds of forms, improve the load resistance performance of system, solve because addition fermentation liquid makes pollutant
The problem that load rises and affects effluent quality effect, it is ensured that the stability of system effluent quality.
The some residual mud of Hybrid-A/A/O subsystem drains into sludge concentration tank, excess sludge
After anaerobic acid-production system processes, obtain the alkaline broth rich in VFAs, decrease
The sludge discharge of Hybrid-A/A/O subsystem, saves Treatment of Sludge expense.Meanwhile, dirty
Mud fixed type biological filler in Hybrid-A/A/O subsystem and suspending type biological filler
On biomembrane also can autoxidation and realize process mud decrement.By the described alkalescence rich in VFAs
Fermentation liquid mixes with the water inlet of Hybrid-A/A/O subsystem, can supplement carbon as the excellence of dephosphorization
Source so that Hybrid-A/A/O subsystem has good anaerobic phosphorus release and aerobic phosphorus absorption function,
Realize good TP removal effect.
Coupling sludge anaerobic of the present invention produces the biphase compound A/A/O system of mud film and the technique of acid
Carbon source distribution is organically combined with supplementary, mud decrement and denitrogenation dephosphorizing hydrodynamics,
Solve the problem that effluent quality is unstable, excess sludge production is big and processing cost is high, make low
Stable water outlet after carbon source municipal sewage treatment reaches one-level emission standard A
(GB18918-2002)。
Claims (16)
1. coupling sludge anaerobic and produce the biphase compound A/A/O system of mud film of acid, its feature exists
In, including:
Sludge anaerobic produces acid subsystem, including: sludge concentration tank, sludge anaerobic produce acid tower, add
Medicine mixing pit, sludge filter press and liquid storage tank；Described sludge concentration tank, sludge anaerobic product acid tower,
Dosing mixing pit, sludge filter press and liquid storage tank are sequentially connected with；
Hybrid-A/A/O subsystem, including: anaerobic pond, anoxic pond, Aerobic Pond and sedimentation tank；
Described anaerobic pond, anoxic pond, Aerobic Pond and sedimentation tank are sequentially communicated；In wherein said anaerobic pond
Biologic packing material be fixed type biological filler；Biologic packing material in described Aerobic Pond is floated life
Thing filler；
Wherein said liquid storage tank connects with anaerobic pond；Described sedimentation tank and sludge concentration tank are by pipe
Road connects.
The most according to claim 1, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that be provided with sludge concentration meter and submersible sewage pump in described sludge concentration tank.
The most according to claim 2, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that the sludge concentration of described sludge concentration tank at 20000mg/L～
Between 30000mg/L.
The most according to claim 1, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that described sludge anaerobic produces and is provided with heat-insulation layer outside acid tower.
The most according to claim 4, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that described sludge anaerobic produce in acid tower be additionally provided with pushing flow mixer, pH meter,
Ultrasonic level gage, add alkali dosing pump and sludge pump, described pushing flow mixer, pH meter, ultrasonic
Ripple liquidometer, add alkali dosing pump and sludge pump is all controlled by PLC.
The most according to claim 5, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that described sludge anaerobic produce the pH in acid tower be 10-12, SRT be 6-10
My god.
The most according to claim 1, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that be additionally provided with agitator in described dosing mixing pit.
The most according to claim 7, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that described dosing mixing pit and sludge filter press are by mud membrane pump even
Logical.
The most according to claim 1, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that be additionally provided with immersible pump in described liquid storage tank, for by liquid storage tank
Fermentation liquid causes anaerobic pond.
The most according to claim 1, coupling sludge anaerobic produces the biphase compound A/A/O of mud film of acid
System, it is characterised in that described fixed type biological filler front end is provided with deflector, described water conservancy diversion
Horizontal sextant angle at the bottom of plate and anaerobic pond pond is 30 °～60 °.
The 11. biphase compound A/A/O of mud film that coupling sludge anaerobic product is sour according to claim 1
System, it is characterised in that the volume of described suspending type biological filler is that aerobic cell body is long-pending
5%-50%, the density of suspending type biological filler is about 0.98-0.99g/cm3。
12. is biphase compound according to the mud film coupling sludge anaerobic product acid described in claim 11
A/A/O system, it is characterised in that the suspended sludge concentration in described anaerobic pond and Aerobic Pond is
2000～4000mg/L.
The 13. biphase compound A/A/O of mud film that coupling sludge anaerobic product is sour according to claim 1
System, it is characterised in that be additionally provided with impeller and aerator in described Aerobic Pond；Described aerobic
The outlet in pond is additionally provided with water outlet screen cloth, and wherein the diameter of water outlet screen cloth is filled out less than suspending type biological
The diameter of material.
14. is biphase compound according to the mud film coupling sludge anaerobic product acid described in claim 13
A/A/O system, it is characterised in that be provided with reflux line between described Aerobic Pond and anoxic pond.
15. is biphase compound according to the mud film coupling sludge anaerobic product acid described in claim 14
A/A/O system, it is characterised in that be provided with mud return line between described sedimentation tank and anaerobic pond
Road.
The mud film that the coupling sludge anaerobic that 16. 1 kinds use described in claim 1 produces acid is biphase multiple
The coupling sludge anaerobic closing A/A/O system produces the biphase compound A/A/O technique of mud film of acid, and it is special
Levying and be, processing step includes:
S1, the excess sludge of Hybrid-A/A/O subsystem is drained into sludge concentration tank；
S2, by sludge concentration tank muddy water mixed solution introduce sludge anaerobic produce acid tower, pass through PLC
Controlling pH, the SRT in anaerobic acid-production tower and suitable mixing speed, muddy water mixed solution exists
Sludge anaerobic produces anaerobic acid-production in acid tower；
S3, sludge anaerobic is produced acid tower discharge muddy water mixed solution introduce dosing mixing pit, adding
Add the calcium salt of certain mass concentration, iron salt or aluminium salt in medicine mixing pit, and stirred by agitator
A small amount of flocculant is added after reaction；
S4, the water outlet of dosing mixing pit is introduced sludge filter press, by the water outlet of dosing mixing pit
Fermentation liquid produced by after filter pressing enters liquid storage tank and continues to employ；
S5, the fermentation liquid in liquid storage tank is evacuated to anaerobic pond water inlet, fermentation liquid and water inlet by than
Entrance anaerobic pond after example mixing, when the mixed liquor of fermentation liquid and water inlet stops one section in anaerobic pond
Between occur after anaerobic phosphorus release effect, the water outlet of anaerobic pond is introduced anoxic pond；
S6, in anoxic pond, the water outlet of anaerobic pond and the nitrification liquid of backflow are sufficiently mixed generation and lack
Aerobic Pond is entered after oxygen Denitrification；
S7, in Aerobic Pond, biomembrane on suspended biological filler utilizes and produces in anaerobic pond
PHB and dissolved oxygen generation aerobic phosphorus absorption effect, the ammonia nitrogen in water is converted by nitration reaction
Becoming nitrate nitrogen, dephosphorization function is mainly completed by the suspended sludge in pond；
S8, by remaining water outlet introduce sedimentation tank, water with precipitation after mud separate after row up to standard
Put；An excess sludge part drains into sludge concentration tank, and another part mud is directly at pressure filter
Outer row after reason, remaining mud is then back to anaerobic pond.
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