CN105668786B - A kind of method and device of Sewage Biological Treatment strengthened denitrification - Google Patents
A kind of method and device of Sewage Biological Treatment strengthened denitrification Download PDFInfo
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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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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such 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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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Abstract
The present invention relates to a kind of method and devices of Sewage Biological Treatment strengthened denitrification, including (1) in the sewage disposal system being made of anaerobic- anoxic- oxic or Anoxybiotic-aerobic biologic treatment process, the biological sludge being discharged after Aerobic biological process and precipitation and separation is through extracellular polymeric solubilization；(2) acidification is hydrolyzed with the biological sludge without extracellular polymeric dissolution in the lysate after extracellular polymeric solubilization；(3) through hydrolysis acidification treated lysate and biological sludge is returned to the anaerobism of Sewage Biological Treatment or anoxic treatment unit arrival end is handled.The present invention is converted into easily biological-degradable substance to the lysate through solubilization, make to be tamed without the biological sludge of EPS solubilization, it is back to sewage biological treatment system, increase carbon source for anoxic treatment unit denitrification, therefore the effect of sewage water denitrification had not only been enhanced, but also minimizing resource utilization can have been carried out to biological sludge；Improve sludge utilization efficiency.
Description
Technical field
The present invention relates to a kind of method and devices of Sewage Biological Treatment strengthened denitrification, especially to sludge through extracellular polymer
Acidification is hydrolyzed again after object dissolution, the biological sludge domestication that part is handled without extracellular polymeric dissolutionization is at suitable
In decomposing extracellular polymeric dissolved matter, the high carbon-nitrogen ratio of release, the substance of easily biological-degradable flow back as the carbon source of sewage water denitrification
To the method for bio-denitrifying sewage processing system, belong to water treatment technology and environment protection field.
Background technique
With the increasingly emergence of water eutrophication problem, the raising of Public Environmental Awareness, sewage water denitrification problem becomes water
The hot spot of extensive concern in contamination control.The nitrogen discharged standard of stringent sewage is formulated in more and more countries and regions.It is typical
Bio-denitrification technology be by the processes such as anaerobism, anoxic, aerobic to make that the nitrification of ammonia nitrogen, nitrate denitrification occur in sewage,
Realize the reduction of water outlet N content, denitrification process needs to consume certain carbon source.Although this method have and meanwhile remove C, N,
The advantages such as P and processing cost are low, but to reach water outlet total nitrogen content < 20mg/L (urban wastewater treatment firm sewage discharge second level
Standard), it must assure that the ratio of dissolubility BOD and total Kjeldahl nitrogen is more than or equal to 4 in raw water according to practical experience.And
The content of organic matter is generally lower in China's municipal wastewater at present, and denitrifying carbon source deficiency leads to whole system nitric efficiency not
It is good.There are problems for some existing treating methods, such as add the method for sodium acetate additional carbon in raising processing into sewage
Also operating cost is added significantly to while effect, it is difficult to popularize in China；Primary sludge fermentation pond is set up, fermentation is utilized
Supernatant afterwards not only takes long time come the method for supplementing carbon source needed for denitrification, it is also difficult to control the stage of reaction.On the other hand,
The high cost of excess sludge processing has become the restraining factors of Sewage Biological Treatment operation, and the Sources decreasing of sludge receives height
Concern.Extracellular polymeric (EPS) dissolution is carried out to excess sludge and obtains the lysate of high carbon-nitrogen ratio, is back to Sewage Biological Treatment
System can provide carbon source for anoxic treatment unit denitrification, can also make mud decrement, but this method has the extracellular of dissolution
Polymer is mostly refractory organic, lacks the microorganism for being adapted to decompose extracellular polymeric lysate in returned sludge etc.
Problem seriously constrains the universal of the technology.Therefore, a kind of municipal sewage biological denitrificaion and life efficiently, inexpensive is explored
Object sludge reduction new process is very necessary.
The extracellular polymeric lysate of difficult for biological degradation is effectively converted into the organic carbon source of bioavailable by the present invention,
And make to be tamed without the biological sludge of EPS solubilization, become and be suitable for decomposing extracellular polymeric dissolved matter, reaches and mention
The purpose of height reflux utilization of carbon source efficiency, while reducing biological sludgeization and enhancing sewage water denitrification ability can be made, to solve ability
The Technological Economy problem in domain provides technological means.
Summary of the invention
The present invention relates to a kind of biological sludges to be hydrolyzed acidification after EPS dissolves again, discharges high carbon-nitrogen ratio, Yi Sheng
Carbon source of the substance of object degradation as denitrification denitrogenation, while will be tamed and dociled in biological sludge without the part that EPS dissolutionization is handled
Dissolve the microorganism for being suitable for decomposing EPS dissolved matter, the Material recirculation after hydrolysis acidification to arriving bio anaerobic or anoxic treatment stage,
The method that denitrogenation is carried out to sewage.
Sewage treatment plant generates a large amount of biological sludges daily, and biological sludge is made of microorganism and EPS etc., and EPS is about
Accounting for sludge is 50-60%, is the chief component of organic matter in biological sludge, wherein 70%~80% is by protein and more
Sugar is constituted, and remaining 20%~30% from humic acid, nucleic acid and lipid etc., and the carbon of these substances and the ratio of nitrogen are significantly high
In biological cell, dissolved lysate has very high carbon-nitrogen ratio.The source EPS is first is that secreted by bacterial cell metabolism
High molecular polymer, two come from the compound in stain disease, i.e. matrix environment locating for sludge.Some researches show that sludge
EPS is made of the not biodegradable EPS of 40% biodegradable EPS and 60%, and biodegradable part is generally difficult
Degradable chemical, biodegradability are poor.Conventional biological denitrificaion processing system, that is, equipment anaerobic bio-treatment of wastewater, sewage simultaneously
Lack the microorganism that can utilize EPS in anoxic biological treatment device and sewage aerobic biological treatment device, limits the benefit of EPS
Use efficiency.The biological sludge lysate that EPS dissolves available high carbon-nitrogen ratio is carried out to the biological sludge of discharge；As carbon
Source flows back into biological denitrificaion processing system, such as the anaerobism or anoxic treatment unit arrival end of Sewage Biological Treatment, can supplement dirt
Carbon source in water raw water improves denitrification denitrogenation effect, while realizing biological sludge to the consumption of this some residual sludge
Minimizing；It, should in order to improve the bio-degradable of reflux lysate and avoid lacking adaptable microorganism in processing system
Invention after the processing of EPS dissolutionization, then is hydrolyzed acidification, can effectively make difficult for biological degradation to biological sludge
Organic matter further decomposes, and is converted into easily biological-degradable substance, and makes to be tamed without solubilized biological sludge, domestication
Microorganism afterwards is more suitable for the degradation dissolved product of EPS, reduces cost of investment.
The present invention is achieved by the following technical scheme:
A kind of method of Sewage Biological Treatment strengthened denitrification, is at least made of following process:
(1) in the sewage disposal system being made of anaerobic- anoxic- oxic or Anoxybiotic-aerobic biologic treatment process, from good
The biological sludge being discharged after oxygen biological treatment and precipitation and separation is through extracellular polymeric solubilization；
(2) lysate after extracellular polymeric solubilization is carried out with the biological sludge without extracellular polymeric dissolution
Hydrolysis acidification processing；
(3) it is returned at the anaerobism or anoxic of Sewage Biological Treatment through hydrolysis acidification treated lysate and biological sludge
Reason unit arrival end is handled.
The hydrolysis acidification pool hydraulic detention time is 24-28h, and sludge retention time 1.5-2d, basicity is in 700-
750mg/L。
The biological sludge without extracellular polymeric dissolution of the hydrolysis acidification processing addition derives from the reflux of sedimentation basin
One or more selections of sludge and the mud mixture of anoxic pond.
It is molten to include at least bio-denitrifying sewage processing unit, sedimentation basin, EPS for the device of sewage water treatment method of the invention
Solve device and hydrolysis and acidification treater；The sludge outlet of sedimentation basin is connect with the sludge inlet of EPS dissolver, EPS dissolution
The sludge outlet of device is connect with hydrolysis and acidification treater sludge inlet, clarifier sludge outlet and anaerobic biological treatment apparatus
Or anoxic biological treatment device sludge inlet connection.
The bio-denitrifying sewage processing unit includes concatenated equipment anaerobic bio-treatment of wastewater, at sewage anoxic biology
Manage device and sewage aerobic biological treatment device；Or concatenated sewage anoxic biological treatment device and sewage aerobic biological treatment fill
It sets.
Hydrolysis and acidification treater sludge inlet includes following 3 kinds of connection types:
Hydrolysis and acidification treater is clarifier sludge outlet and water without the biological sludge source that extracellular polymeric dissolves
Solve the connection of acidification treater sludge inlet.
Hydrolysis and acidification treater is sewage anoxic biological treatment dress without the biological sludge source that extracellular polymeric dissolves
Mud mixture outlet after the sewage anoxic biological treatment set is connect with the sludge inlet of hydrolysis and acidification treater.
Hydrolysis and acidification treater is clarifier sludge outlet and dirt without the biological sludge source that extracellular polymeric dissolves
Mud mixture outlet while and hydrolysis and acidification treater after the sewage anoxic biological treatment of water anoxic biological treatment device
Sludge inlet connection.
It is described as follows:
After the mud mixture that bio-denitrifying sewage processing system is discharged separates in sedimentation basin, biological sludge is carried out
EPS dissolution process.It is made of due to biological sludge microorganism and EPS etc., accounts for about the EPS ingredient master that sludge is 50-60%
It to include polysaccharide, protein and a small amount of humus of high carbon-nitrogen ratio, the carbon of these substances and the ratio of nitrogen are much higher than biology
Cell, dissolved lysate have very high carbon-nitrogen ratio, but sludge EPS be can not by 40% biodegradable EPS and 60%
Biodegradable EPS composition, and biodegradable part is generally recalcitrant substance, biodegradability is poor.And conventional life
Object denitrogenation processing system, that is, equipment anaerobic bio-treatment of wastewater, sewage anoxic biological treatment device and sewage aerobic biological treatment dress
The microorganism of EPS can be utilized by setting middle shortage, and the utilization efficiency of EPS is low.The biological sludge further progress water that will be dissolved through EPS
Acidification is solved, so that the organic matter of difficult for biological degradation is further decomposed, be converted into easily biological-degradable substance, is improved
Biodegradability, and make to be tamed without the biological sludge of EPS solubilization, the microorganism after domestication is more suitable for degrading
The dissolved product of EPS, by lysate be back to biological processing unit anaerobism or anoxic treatment unit arrival end with sewage into
Row processing can be anoxic section denitrification process biological respinse supplementary carbon source and acclimated microorganism, while reach sludge and subtract
The purpose of quantization.
The dissolution EPS that is invented, acclimation sludge are to promote the detailed process of the method for sewage water denitrification are as follows: by pretreated
Sewage enters bio-denitrifying sewage processing unit, and the mud mixture through denitrification process enters sedimentation basin separation, and supernatant is up to standard
Discharge, the sludge part of generation are back to biological denitrification system to maintain the microorganism overall balance of biological treatment system, part
Sludge enters EPS dissolver and carries out solubilization, generates high-carbon than lysate, processed lysate and carrys out autoprecipitation
The sludge in pond or the mud mixture of sludge anoxic biological treatment device enter hydrolysis acidification device, the high-carbon after further decomposing
The lysate of nitrogen ratio enters the anaerobism or anoxic section of biological denitrificaion processing system together with the biological sludge of domestication, is denitrification biology
React supplementary carbon source and acclimated microorganism.The processing of excess sludge outlet.The method of EPS dissolution can use ultrasonic wave, ozone
Oxidation, centrifugation or addition alkaline reagent such as sodium bicarbonate, sodium carbonate, lime, sodium hydroxide etc..
There are three types of the sludge sources of the hydrolysis acidification device.Source one: when the biological sludge amount of sedimentation basin discharge is more
When, i.e., when maintaining the total biomass of sewage disposal system to balance and have excess sludge generation enough, part biological sludge is directly arranged
Enter hydrolysis acidification device to provide the biological sludge without EPS solubilization；Source two: when the biology of sedimentation basin discharge is dirty
When mud amount is less, i.e., when no excess sludge or less excess sludge, the part mud that is discharged from sewage anoxic biological treatment device
Aqueous mixtures are discharged into hydrolysis and acidification treater so that provide can be by acclimated microorganism；Source three: when the biology of sedimentation basin discharge
When sludge quantity is moderate, the biological sludge that sludge a part of hydrolysis acidification device is discharged from sedimentation basin, a part from
The mud mixture of sewage anoxic biological treatment device discharge.
The biological denitrificaion processing unit is divided into two kinds.One kind includes equipment anaerobic bio-treatment of wastewater, sewage anoxic
Biological treatment device and sewage aerobic biological treatment device, another kind include that sewage anoxic biological treatment device and sewage aerobic are raw
Object processing unit.Two kinds of devices energy strengthened denitrification, according to the difference of influent quality and investment, the difference for operating operating cost
Select corresponding device.
The invention has the advantages that carrying out EPS dissolution to the biological sludge that sewage treatment process generates, lysate is into one
One-step hydrolysis is acidified and the method for carrying out denitrogenation to sewage that flows back；To the further hydrolysis acidification processing of lysate through solubilization
The organic matter of difficult for biological degradation can be made further to decompose, be converted into easily biological-degradable substance, improve biodegradability, and make without
The biological sludge for crossing EPS solubilization is tamed, and is more suitable for the degradation dissolved product of EPS, is back to saprobia
Processing system can increase carbon source for anoxic treatment unit denitrification, therefore not only enhance the effect of sewage water denitrification, but also can be to biology
Sludge carries out minimizing resource utilization；Sludge utilization efficiency is improved, other techniques is compared, decreases cost of investment.
Detailed description of the invention
Fig. 1: 1 device flow chart of embodiment
Fig. 2: 2 device flow chart of embodiment
Fig. 3: 3 device flow chart of embodiment
Fig. 4: 4 device flow chart of embodiment
Fig. 5: 5 device flow chart of embodiment
Fig. 6: 6 device flow chart of embodiment
Wherein: 1- raw water；2- equipment anaerobic bio-treatment of wastewater；Mud mixture after 3- anerobic sowage biological treatment；
4- backflow mixed liquor；5- sewage anoxic biological treatment device；Mud mixture after 6- sewage anoxic biological treatment；7- sewage is good
Oxygen biological treatment device；Mud mixture after 8- sewage aerobic biological treatment；9- sedimentation basin；10- permitted discharge；11- reflux
Sludge；12- excess sludge；13-EPS dissolver；14- lysate；15- hydrolysis and acidification treater；16- backflow mixed liquor；
17- air.
Specific embodiment
Hydrolysis acidification is further after the excess sludge that the present invention is suitable for generating sewage treatment plant carries out sludge EPS dissolution
It decomposes, being back to biological anoxic unit is denitrification denitrogenation process supplementary carbon source and acclimated microorganism, increase denitrification effect,
It realizes sludge reduction, improves biological sludge utilization efficiency.This method not only provides for biological processing unit essential easy
The carbon source of degradation and acclimated microorganism also achieve the utilization to sludge reduction recycling, before meeting processing target
It puts and substantially reduces cost.
The device of sewage water treatment method of the invention includes at least: bio-denitrifying sewage processing unit, EPS dissolver
13, hydrolysis and acidification treater 15 and sedimentation basin 9；Bio-denitrifying sewage processing unit include equipment anaerobic bio-treatment of wastewater 2,
Sewage anoxic biological treatment device 5, sewage aerobic biological treatment device 7 or sewage anoxic biological treatment device 5, sewage aerobic are raw
Object processing unit 7；The sludge outlet of sedimentation basin 9 is connect with the sludge inlet of EPS dissolver 13, the dirt of EPS dissolver 13
Mud outlet is connect with 15 sludge inlet of hydrolysis and acidification treater, 9 sludge outlet of sedimentation basin and anaerobic biological treatment apparatus 3 or scarce
The connection of 5 sludge inlet of oxygen biological treatment device.
Bio-denitrifying sewage processing unit include equipment anaerobic bio-treatment of wastewater 2, sewage anoxic biological treatment device 5,
Sewage aerobic biological treatment device 7 or sewage anoxic biological treatment device 5, sewage aerobic biological treatment device 7.
Selection that there are three types of the biological sludge sources that hydrolysis and acidification treater 15 is dissolved without extracellular polymeric: source one:
9 sludge outlet of sedimentation basin is connect with 15 sludge inlet of hydrolysis and acidification treater；Source two: sewage anoxic biological treatment device 5
Sewage anoxic biological treatment after mud mixture 6 outlet connect with the sludge inlet of hydrolysis and acidification treater 15；Source
Three: the mud mixture 6 after the sewage anoxic biological treatment of 9 sludge outlet of sedimentation basin and sewage anoxic biological treatment device 5 goes out
Mouth is connect with 15 sludge inlet of hydrolysis and acidification treater simultaneously.
Embodiment 1
The present embodiment is by taking the treatment process of certain sewage treatment plant is improved as an example, as shown in Figure 1, the sewage treatment plant uses
A2O (anaerobic- anoxic- oxic) technique synchronizes denitrogenation dephosphorizing.Raw water 1 flows into equipment anaerobic bio-treatment of wastewater 2, and sewage is detested
Mud mixture 3 after oxygen biological treatment flows into sewage anoxic biological treatment device 5, and the muddy water after sewage anoxic biological treatment is mixed
It closes object 6 and flows into sewage aerobic biological treatment device 7, continue to be aerated (being passed through air 17) to sewage aerobic biological treatment device 7, return
Stream mixed liquor 4 is back to anoxic biological treatment device 5, and the mud mixture 8 after sewage aerobic biological treatment flows into sedimentation basin 9,
Last permitted discharge 10 discharges, and the partial reflux sludge 11 being discharged from sedimentation basin 9 is back to equipment anaerobic bio-treatment of wastewater 2,
Partial reflux sludge 11 enters EPS dissolver 13 and carries out solubilization using supercritical ultrasonics technology, and sodium bicarbonate is added and adjusts pH
Value is 9, ultrasonic density 15W/cm2, the processing time is 30 minutes.Lysate 14, partial reflux sludge 11 and from sewage lack
It is easy that the part mud mixture 6 that oxygen biological treatment device 5 is discharged, which enters the further decomposition and inversion of hydrolysis and acidification treater 15,
Degradable chemical, and make to be tamed without solubilized biological sludge, what is be discharged from hydrolysis and acidification treater 15 returns
Stream mixed liquor 16 is back to equipment anaerobic bio-treatment of wastewater 2 and provides degradable carbon source and acclimated microorganism for denitrification, remains
Remaining 12 outlet of sludge.By the monitoring to total nitrogen in the carbon-nitrogen ratio and water outlet in reflux carbon source, carbon-nitrogen ratio is higher than in the carbon source that flows back
20, total nitrogen content is lower than 15mg/L (level-one A standard) in water outlet.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, as shown in Fig. 2, the difference is that, when the biology of sedimentation basin discharge is dirty
When mud amount is less, clipped returned sludge 11 is directly entered 15 sections of hydrolysis and acidification treater.
Detailed process is as follows: raw water 1 flows into equipment anaerobic bio-treatment of wastewater 2, the muddy water after anerobic sowage biological treatment
Mixture 3 flows into sewage anoxic biological treatment device 5, and the mud mixture 6 after sewage anoxic biological treatment flows into sewage aerobic
Biological treatment device 7 continues to be aerated (being passed through air 17) to sewage aerobic biological treatment device 7, and backflow mixed liquor 4 is back to scarce
Oxygen biological treatment device 5, the mud mixture 8 after sewage aerobic biological treatment flow into sedimentation basin 9, last 10 row of permitted discharge
Put, the partial reflux sludge 11 being discharged from sedimentation basin 9 is back to equipment anaerobic bio-treatment of wastewater 2, partial reflux sludge 11 into
Enter EPS dissolver 13 and solubilization is carried out using supercritical ultrasonics technology, it is 10 that sodium bicarbonate, which is added, and adjusts pH value, ultrasonic density
For 10W/cm2, the processing time is 30 minutes.Lysate 14 and the part muddy water being discharged from sewage anoxic biological treatment device 5 are mixed
Closing object 6 to enter the further decomposition and inversion of hydrolysis and acidification treater 15 is easily biological-degradable substance, and is made without solubilized
Biological sludge is tamed, and the backflow mixed liquor 16 being discharged from hydrolysis and acidification treater 15 is back to anerobic sowage biological treatment
Device 2 provides degradable carbon source and acclimated microorganism, 12 outlet of excess sludge for denitrification.By to the carbon in reflux carbon source
Nitrogen is than the monitoring with total nitrogen in water outlet, and carbon-nitrogen ratio is higher than 20 in the carbon source that flows back, and total nitrogen content is lower than 15mg/L (level-one A in water outlet
Standard).
Embodiment 3
The present embodiment is substantially the same manner as Example 1, as shown in figure 3, the difference is that, when the biology of sedimentation basin discharge is dirty
When mud amount is more, omits the part mud mixture 6 being discharged from sewage anoxic biological treatment device and enter hydrolysis acidification processing dress
Set 15 sections.
Detailed process is as follows: raw water 1 flows into equipment anaerobic bio-treatment of wastewater 2, the muddy water after anerobic sowage biological treatment
Mixture 3 flows into sewage anoxic biological treatment device 5, and the mud mixture 6 after sewage anoxic biological treatment flows into sewage aerobic
Biological treatment device 7 continues to be aerated (being passed through air 17) to sewage aerobic biological treatment device 7, and backflow mixed liquor 4 is back to scarce
Oxygen biological treatment device 5, the mud mixture 8 after sewage aerobic biological treatment flow into sedimentation basin 9, last 10 row of permitted discharge
Put, the partial reflux sludge 11 being discharged from sedimentation basin 9 is back to equipment anaerobic bio-treatment of wastewater 2, partial reflux sludge 11 into
Enter EPS dissolver 13 and solubilization is carried out using supercritical ultrasonics technology, it is 11 that sodium bicarbonate, which is added, and adjusts pH value, ultrasonic density
For 12W/cm2, the processing time is 20 minutes.Lysate 14 and partial reflux sludge 11 enter hydrolysis and acidification treater 15 into one
Step decomposition and inversion is easily biological-degradable substance, and makes to be tamed without solubilized biological sludge, from hydrolysis acidification processing
The backflow mixed liquor 16 that device 15 is discharged is back to equipment anaerobic bio-treatment of wastewater 2 and provides degradable carbon source and for denitrification
Acclimated microorganism, 12 outlet of excess sludge.By the monitoring to total nitrogen in the carbon-nitrogen ratio and water outlet in reflux carbon source, flow back carbon source
Middle carbon-nitrogen ratio is higher than 20, and total nitrogen content is lower than 15mg/L (level-one A standard) in water outlet.
Embodiment 4
The present embodiment is substantially the same manner as Example 1, as shown in figure 4, the difference is that, in order to reduce investment, reduce behaviour
Make expense, using anoxic-aerobic process, omits equipment anaerobic bio-treatment of wastewater 2.
Detailed process is as follows: raw water 1 flows into sewage anoxic biological treatment device 5, the muddy water after sewage anoxic biological treatment
Mixture 6 flows into sewage aerobic biological treatment device 7, continues to be aerated (being passed through air 17) to sewage aerobic biological treatment device 7,
Backflow mixed liquor 4 is back to anoxic biological treatment device 5, and the mud mixture 8 after sewage aerobic biological treatment flows into sedimentation basin
9, last permitted discharge 10 discharges, from the partial reflux sludge reflux that sedimentation basin 9 is discharged to sewage anoxic biological treatment device 5,
Partial reflux sludge 11 enters EPS dissolver 13 and carries out solubilization using supercritical ultrasonics technology, and sodium bicarbonate is added and adjusts pH
Value is 13, ultrasonic density 15W/cm2, the processing time is 10 minutes.Lysate 14, partial reflux sludge 11 and from sewage lack
It is easy that the part mud mixture 6 that oxygen biological treatment device 5 is discharged, which enters the further decomposition and inversion of hydrolysis and acidification treater 15,
Degradable chemical, and make to be tamed without solubilized biological sludge, what is be discharged from hydrolysis and acidification treater 15 returns
Stream mixed liquor 16 is back to sewage anoxic biological treatment device 5 and provides degradable carbon source and acclimated microorganism for denitrification, remains
Remaining 12 outlet of sludge.By the monitoring to total nitrogen in the carbon-nitrogen ratio and water outlet in reflux carbon source, carbon-nitrogen ratio is higher than in the carbon source that flows back
20, total nitrogen content is lower than 15mg/L (level-one A standard) in water outlet.
Embodiment 5
The present embodiment is substantially the same manner as Example 4, as shown in figure 5, the difference is that, when the biology of sedimentation basin discharge is dirty
When mud amount is less, clipped returned sludge 11 is directly entered 15 sections of hydrolysis and acidification treater.
Embodiment 6
The present embodiment is substantially the same manner as Example 4, as shown in fig. 6, the difference is that, when the biology of sedimentation basin discharge is dirty
When mud amount is more, omits the part mud mixture 6 being discharged from sewage anoxic biological treatment device and enter hydrolysis acidification processing dress
Set 15 sections.
Embodiment 7
The present embodiment is substantially the same manner as Example 1, as shown in Figure 1, the difference is that can using Ozonation progress
Dissolve processing.
Embodiment 8
The present embodiment is substantially the same manner as Example 1, as shown in Figure 1, the difference is that being carried out using centrifugal process solubilized
Processing.
Claims (2)
1. a kind of method of Sewage Biological Treatment strengthened denitrification, feature are at least made of following process:
(1) in the sewage disposal system being made of anaerobic- anoxic- oxic or Anoxybiotic-aerobic biologic treatment process, from aerobic life
The biological sludge being discharged after object processing and precipitation and separation is through extracellular polymeric solubilization；
(2) lysate after extracellular polymeric solubilization is hydrolyzed with the biological sludge dissolved without extracellular polymeric
Acidification；
(3) it is returned to through hydrolysis acidification treated lysate and biological sludge by anaerobic- anoxic- oxic biological treatment process group
At Sewage Biological Treatment anaerobism or Anoxybiotic-aerobic biologic treatment process composition Sewage Biological Treatment anoxic treatment unit
Arrival end is handled；
Hydrolysis acidification pool hydraulic detention time is 24-28h, and sludge retention time 1.5-2d, basicity is in 700-750m g/L；Water
Solve returned sludge and anoxic pond of the biological sludge without extracellular polymeric dissolution from sedimentation basin of acidification addition
One or more selections of mud mixture.
2. realizing the device of method described in claim 1, it is characterised in that include at least bio-denitrifying sewage processing unit, sink
Shallow lake pond, EPS dissolver and hydrolysis and acidification treater；Bio-denitrifying sewage processing unit includes concatenated anerobic sowage biology
Processing unit, sewage anoxic biological treatment device and sewage aerobic biological treatment device or concatenated sewage anoxic biological treatment dress
It sets and sewage aerobic biological treatment device；The sludge outlet of sedimentation basin is connect with the sludge inlet of EPS dissolver, EPS dissolution
The sludge outlet of device is connect with hydrolysis and acidification treater sludge inlet, clarifier sludge outlet and anaerobic- anoxic- oxic group
At bio-denitrifying sewage processing unit in anaerobic biological treatment apparatus or anaerobic-aerobic composition bio-denitrifying sewage processing
Anoxic biological treatment device sludge inlet connection in device；The dirt of clarifier sludge outlet and sewage anoxic biological treatment device
One or more being connect with hydrolysis and acidification treater sludge inlet of mud mixture outlet after water anoxic biological treatment.
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| CN114573095B (en) * | 2022-03-10 | 2023-09-26 | 西安建筑科技大学 | Biological denitrification, sludge reduction and increased heat production water treatment operation method |
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| EP1293484A1 (en) * | 2001-09-13 | 2003-03-19 | Seghers Better Technology Group | Process and an apparatus for biological treatment of aqueous organic wastes |
| CN101786778A (en) * | 2010-03-23 | 2010-07-28 | 天津大学 | Reduction method for biological sludge |
| CN102515448A (en) * | 2011-12-26 | 2012-06-27 | 天津大学 | Process for promoting biological denitrification by performing ultrasonic disintegration on residual sludge to reflow and replenish denitrification carbon source |
| CN103288300A (en) * | 2013-06-18 | 2013-09-11 | 哈尔滨工业大学 | Low-temperature treatment method of A/O/MBBR municipal sewage |
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