CN109205968A - A kind of sewage water denitrification carbon source adds technique - Google Patents
A kind of sewage water denitrification carbon source adds technique Download PDFInfo
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/02—Aerobic processes
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/28—Anaerobic digestion processes
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- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- C02F2101/00—Nature of the contaminant
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- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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Abstract
The invention discloses a kind of sewage water denitrification carbon sources to add technique: raw sewage sequentially enters biological tank anaerobism section, anoxic section, aerobic section after rotational flow grit chamber and primary sedimentation tank processing, finally enter secondary settling tank, the water inlet total nitrogen and water outlet total nitrogen for monitoring biological tank on-line, control biological tank dissolved oxygen concentration 1.0mg/L-1.5mg/L；The sludge reflux of the secondary settling tank is to anaerobism section, and external reflux ratio control is in 50%-70%, and the aerobic section effluent recycling to anoxic section, internal reflux ratio control is in 200%-300%；Carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained.Present invention process, the interior accurate control of external reflux ratio regulation, on the one hand, can satisfy the demand in denitrification process to carbon source；On the other hand, it avoids carbon source from excessively adding, carbon source is caused to waste；And can be effectively controlled and detest anoxic section dissolved oxygen concentration and denitrification residence time, to promote biosystem anti-nitration reaction.
Description
Technical field
The invention belongs to technical field of sewage, specifically, are related to a kind of sewage water denitrification carbon source and add technique.
Background technique
With country and local environmental protection administration to Sewage Treatment Plant discharge water matter requirement it is increasingly stringent, sewage treatment plant
Discharge standard is also being continuously improved.Carbon source is nutrient indispensable in deamination technique, it, which is mainly consumed in, releases phosphorus, anti-nitre
In change and heterotroph metabolic process.But in denitrification process there is water-inlet carbon source deficiency in part sewage treatment plant, sternly
Ghost image ring biosystem anti-nitration reaction, water outlet total nitrogen tend not to it is up to standard, this just need by auxiliary add carbon source to guarantee
Denitrification effect, however in order to realize the long-term stabilization denitrogenation of biosystem, carbon source is needed enough and is uninterruptedly added, and no matter into
How water water quality and water change, and carbon source, which adds, not to be changed, and carbon source adds insufficient or excessive, cause to add cost in running cost
It is accounted in relatively high, and is difficult to ensure effluent quality qualified discharge, therefore be badly in need of a kind of pair of carbon source and add to carry out accurate optimization control
The technique of system.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of sewage water denitrification carbon sources to add technique, inside and outside
The accurate control of reflux ratio regulation, rationally controls carbon source dosage, to promote biosystem anti-nitration reaction.
What the object of the invention was realized in: a kind of sewage water denitrification carbon source adds technique, it is characterised in that according to the following steps
It carries out:
(1) raw sewage enters biological tank anaerobism section after rotational flow grit chamber and primary sedimentation tank processing, discharges phosphorus and to organic matter
Carry out ammonification；Carbon source, which is carried out, into biological tank anoxic section, at anoxic section adds carry out denitrogenation；It is gone subsequently into biological tank aerobic section
Except BOD, while nitrification processing and the absorption of phosphorus are carried out, finally enter secondary settling tank,
(2) the water inlet total nitrogen and water outlet total nitrogen of biological tank are monitored on-line, and controls biological tank dissolved oxygen concentration 1.0mg/L-
1.5mg/L；
(3) sludge reflux of the secondary settling tank is controlled to anaerobism section, external reflux ratio in 50%-70%, the aerobic section
Effluent recycling to anoxic section, internal reflux ratio is controlled in 200%-300%；
(4) carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained, carbon source dosage CmBy following
Mode calculates:
TN (out)=TN (into)-K*BOD (into) -0.05*[BOD (into)-BOD (out)] ... formula is 1.；
Formula is 2. by N=TN (out)-TN (actually going out) ...；
Cm=5N ... formula is 3.；
In formula: CmFor the external carbon source amount (in terms of COD) added, mg/L；
TN (out) is theoretical water outlet total nitrogen content, mg/L；
TN (into) is theoretical water inlet total nitrogen content, mg/L；
TN (actually going out) is practical water outlet total nitrogen content, mg/L.
Preferably, above-mentioned aerobic section is equipped with oxygen supply air blower, and the remaining tolerance of the air blower is back to rotational flow grit chamber.
Preferably, above-mentioned external reflux ratio is 60%, internal reflux ratio 200%.
In sewage disposal process, sewage after rotational flow grit chamber and primary sedimentation tank, need successively by anaerobism section, anoxic section,
Aerobic section, secondary settling tank carry out.Anti-nitration reaction occurs in anaerobism section and anoxic section, denitrifying bacterium is using organic carbon source as electron donor
Nitrogen is converted by interior reflux bring nitrite nitrogen or nitrate nitrogen, completes denitrification process.Nitrifier will be dirty under aerobic condition
Mineralized nitrogen in water is nitrite nitrogen or nitrate nitrogen, is recirculated back to anoxic section in nitrite nitrogen or nitrate nitrogen.It is dirty that treated
Water enters secondary settling tank and is separated by solid-liquid separation, and by activated sludge (cellular material) and supernatant separation, activated sludge is with exteenal reflux pipe
Road returns to anaerobism section, and remaining nitrate nitrogen is exported with supernatant, and water outlet total nitrogen is monitored by monitor and obtained, and feeds back to carbon
Source toss area calculates real-time carbon source dosage according to calculating formula.
The utility model has the advantages that
A kind of sewage water denitrification carbon source of the present invention adds technique, the interior accurate control of external reflux ratio regulation, on the one hand, can satisfy
To the demand of carbon source in denitrification process；On the other hand, it avoids carbon source from excessively adding, increases organic concentration in sewage, cause
Carbon source waste；And can be effectively controlled and detest anoxic section dissolved oxygen concentration and denitrification residence time, to promote biosystem anti-
Nitration reaction.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Below with reference to embodiment and attached drawing, the invention will be further described.
Embodiment 1
A kind of sewage water denitrification carbon source adds technique, comprises the steps of:
(1) raw sewage enters biological tank anaerobism section after rotational flow grit chamber and primary sedimentation tank processing, discharges phosphorus and to organic matter
Carry out ammonification；Carbon source, which is carried out, into biological tank anoxic section, at anoxic section adds carry out denitrogenation；It is gone subsequently into biological tank aerobic section
Except BOD, while nitrification processing and the absorption of phosphorus are carried out, finally enter secondary settling tank, the aerobic section is additionally provided with oxygen supply air blower, should
The remaining tolerance of air blower is back to the rotational flow grit chamber.
(2) the water inlet total nitrogen and water outlet total nitrogen of biological tank are monitored on-line, and controls biological tank dissolved oxygen concentration 1.0mg/L-
1.5mg/L。
(3) sludge reflux of the secondary settling tank is controlled to anaerobism section, external reflux ratio 50%, and the aerobic section is discharged back
It is flow to anoxic section, internal reflux ratio is controlled 250%.
(4) carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained, carbon source dosage CmBy following
Mode calculates:
TN (out)=TN (into)-K*BOD (into) -0.05*[BOD (into)-BOD (out)] } ... formula is 1.；
Formula is 2. by N=TN (out)-TN (actually going out) ... ...；
Cm=5N ... ... formula is 3.；
In formula: CmFor the external carbon source amount (in terms of COD) added, mg/L；
TN (out) is theoretical water outlet total nitrogen content, mg/L；
TN (into) is theoretical water inlet total nitrogen content, mg/L；
TN (actually going out) is practical water outlet total nitrogen content, mg/L.
Embodiment 2
A kind of sewage water denitrification carbon source adds technique, comprises the steps of:
(1) raw sewage enters biological tank anaerobism section after rotational flow grit chamber and primary sedimentation tank processing, discharges phosphorus and to organic matter
Carry out ammonification；Carbon source, which is carried out, into biological tank anoxic section, at anoxic section adds carry out denitrogenation；It is gone subsequently into biological tank aerobic section
Except BOD, while nitrification processing and the absorption of phosphorus are carried out, finally enter secondary settling tank, the aerobic section is additionally provided with oxygen supply air blower, should
The remaining tolerance of air blower is back to the rotational flow grit chamber.
(2) the water inlet total nitrogen and water outlet total nitrogen of biological tank are monitored on-line, and controls biological tank dissolved oxygen concentration 1.0mg/L-
1.5mg/L。
(3) sludge reflux of the secondary settling tank is controlled to anaerobism section, external reflux ratio 60%, and the aerobic section is discharged back
It is flow to anoxic section, internal reflux ratio is controlled 200%.
(4) carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained, carbon source dosage CmBy following
Mode calculates:
TN (out)=TN (into)-K*BOD (into) -0.05*[BOD (into)-BOD (out)] } ... formula is 1.；
Formula is 2. by N=TN (out)-TN (actually going out) ... ...；
Cm=5N ... ... formula is 3.；
In formula: CmFor the external carbon source amount (in terms of COD) added, mg/L；
TN (out) is theoretical water outlet total nitrogen content, mg/L；
TN (into) is theoretical water inlet total nitrogen content, mg/L；
TN (actually going out) is practical water outlet total nitrogen content, mg/L.
Embodiment 3
A kind of sewage water denitrification carbon source adds technique, comprises the steps of:
(1) raw sewage enters biological tank anaerobism section after rotational flow grit chamber and primary sedimentation tank processing, discharges phosphorus and to organic matter
Carry out ammonification；Carbon source, which is carried out, into biological tank anoxic section, at anoxic section adds carry out denitrogenation；It is gone subsequently into biological tank aerobic section
Except BOD, while nitrification processing and the absorption of phosphorus are carried out, finally enter secondary settling tank, the aerobic section is additionally provided with oxygen supply air blower, should
The remaining tolerance of air blower is back to the rotational flow grit chamber.
(2) the water inlet total nitrogen and water outlet total nitrogen of biological tank are monitored on-line, and controls biological tank dissolved oxygen concentration 1.0mg/L-
1.5mg/L。
(3) sludge reflux of the secondary settling tank is controlled to anaerobism section, external reflux ratio 70%, and the aerobic section is discharged back
It is flow to anoxic section, internal reflux ratio is controlled 300%.
(4) carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained, carbon source dosage CmBy following
Mode calculates:
TN (out)=TN (into)-K*BOD (into) -0.05*[BOD (into)-BOD (out)] } ... formula is 1.；
Formula is 2. by N=TN (out)-TN (actually going out) ... ...；
Cm=5N ... ... formula is 3.；
In formula: CmFor the external carbon source amount (in terms of COD) added, mg/L；
TN (out) is theoretical water outlet total nitrogen content, mg/L；
TN (into) is theoretical water inlet total nitrogen content, mg/L；
TN (actually going out) is practical water outlet total nitrogen content, mg/L.
Embodiment 4
Control group in the January, -2018 in January, 1 2017 of mechanical energy processing in the following ways: (1) biological tank DO is controlled and is existed
2.5mg/L-3.5mg/L；(2) 120% or so, internal reflux ratio is controlled 400% or so for external reflux ratio control.Processing result is such as
Shown in table 1.
2 years 2 months in June, -2018 of control group: (1) biological tank DO is controlled in 1.0mg/L-1.5mg/L；(2) outside
60% or so, internal reflux ratio is controlled 200% or so for reflux ratio control；(3) water outlet of daily three sections of biological tank anoxic of measurement
Nitrate nitrogen finely tunes glucose dosage according to this data and same day inflow.Processing result is as shown in table 2.
Experimental group three groups of in the July, 2018 of in September, -2018 point, three groups of methods for pacifying embodiment 1,2,3 respectively are handled,
Average statistical.As a result as shown in table 3 respectively.
The detection data and result in table 1 control group in January, -2018 in January, 1 2017:
The detection data and result in 2 year 2 months-June of 2 control groups of table:
The detection data and result (mean value) of 3 embodiment 1,2,3 (in July, 2018-September) of table:
It can be seen that the carbon source that the carbon source amount actually added is added than theory always with actual difference from the theory in table 1
Amount is big.Although the difference shown in table 2 is being improved after tentatively improving, the carbon source amount actually added still close to
The dosage of theoretical carbon source, dosage are still very big.And in table 3 after theoretical and actual difference bimestrial adaptation in the early stage,
It according to real-time detection and adjusts, is significantly less than theoretical dosage in the practical dosage that third month starts carbon source, not only keeps away
The excess for having exempted from carbon source adds, and is also greatly reduced adding for carbon source, economizes on resources, save the cost.
Finally, it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this field
Member under the inspiration of the present invention, without prejudice to the purpose of the present invention and the claims, can make multiple similar tables
Show, such transformation is fallen within the scope of protection of the present invention.
Claims (3)
1. a kind of sewage water denitrification carbon source adds technique, it is characterised in that sequentially include the following steps:
(1) raw sewage enters biological tank anaerobism section after rotational flow grit chamber and primary sedimentation tank processing, discharges phosphorus and carries out to organic matter
Ammonification；Carbon source, which is carried out, into biological tank anoxic section, at anoxic section adds carry out denitrogenation；It is removed subsequently into biological tank aerobic section
BOD, while nitrification processing and the absorption of phosphorus are carried out, secondary settling tank is finally entered,
(2) the water inlet total nitrogen and water outlet total nitrogen of biological tank are monitored on-line, and controls biological tank dissolved oxygen concentration 1.0mg/L-
1.5mg/L；
(3) sludge reflux of the secondary settling tank is to anaerobism section, and external reflux ratio control is in 50%-70%, the aerobic section water outlet
It is back to anoxic section, internal reflux ratio is controlled in 200%-300%；
(4) carbon source dosage is calculated according to the variation of Inlet and outlet water total nitrogen content in real time and is obtained, carbon source dosage CmIt counts in the following manner
It calculates:
TN (out)=TN (into)-K*BOD (into) -0.05*[BOD (into)-BOD (out)] } ... formula is 1.；
Formula is 2. by N=TN (out)-TN (actually going out) ... ...；
Cm=5N ... ... formula is 3.；
In formula: CmFor the external carbon source amount (in terms of COD) added, mg/L；
TN (out) is theoretical water outlet total nitrogen content, mg/L；
TN (into) is theoretical water inlet total nitrogen content, mg/L；
TN (actually going out) is practical water outlet total nitrogen content, mg/L.
2. a kind of sewage water denitrification carbon source according to claim 1 adds technique, it is characterised in that: the aerobic section, which is equipped with, to be supplied
Oxygen air blower, the remaining tolerance of the air blower are back to rotational flow grit chamber.
3. a kind of sewage water denitrification carbon source according to claim 1 adds technique, it is characterised in that: the external reflux ratio is
60%, internal reflux ratio 200%.
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| CN110182952A (en) * | 2019-07-03 | 2019-08-30 | 广州博涛生物技术有限公司 | A kind of compounded carbons dosage automatic feedback and regulating device for municipal sewage plant AAO technique |
| CN110422928A (en) * | 2019-08-19 | 2019-11-08 | 中国市政工程华北设计研究总院有限公司 | A kind of anoxic pond fining carbon source adds control system and progress control method |
| CN110790381A (en) * | 2019-11-28 | 2020-02-14 | 北京协同创新智慧水务有限公司 | Full-flow intelligent control system based on AAO sewage treatment process |
| CN111018110A (en) * | 2019-12-30 | 2020-04-17 | 北京首创清源环境科技有限公司 | Sewage biochemical treatment system and control method |
| CN111039383A (en) * | 2019-12-30 | 2020-04-21 | 重庆商勤科技有限公司 | Carbon source adding method and system |
| CN111410358A (en) * | 2019-12-25 | 2020-07-14 | 西安水牧环境科技有限公司 | Guarantee stable up-to-standard joint control system of sewage treatment plant total nitrogen of water out |
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