CN106927568A - Method for improving phosphorus removal efficiency of A/O process - Google Patents
Method for improving phosphorus removal efficiency of A/O process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 88
- 230000008569 process Effects 0.000 title claims abstract description 38
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 10
- 229910052698 phosphorus Inorganic materials 0.000 title claims description 10
- 239000011574 phosphorus Substances 0.000 title claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000010802 sludge Substances 0.000 claims abstract description 24
- 238000004088 simulation Methods 0.000 claims abstract description 21
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000010992 reflux Methods 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 8
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 6
- 238000006731 degradation reaction Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 241000894006 Bacteria Species 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005457 optimization Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000013178 mathematical model Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000011282 treatment Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 3
- 206010002660 Anoxia Diseases 0.000 description 2
- 241000976983 Anoxia Species 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000007953 anoxia Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010786 composite waste Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A method for improving the dephosphorization efficiency of an A/O process comprises the following steps: firstly, measuring a water quality parameter and a water composition parameter of inlet water; collecting process parameters of the A/O process to be optimized; step three, establishing an A/O process model in simulation software containing an ASM2d model; inputting the parameters obtained in the first step and the second step into corresponding positions of an A/O process model processing unit, and calibrating the model; and step five, performing condition simulation of operation parameter change by taking the sludge reflux ratio, the volume ratio of the anoxic tank to the aerobic tank and the sludge age as variables to obtain the process condition with the optimal dephosphorization effect. The invention applies the mathematical model to the optimization of the A/O process, and compared with the engineering test technology, the mathematical simulation has the advantage of investment saving. The optimal operation condition can be quickly obtained through optimization research on key parameters influencing the dephosphorization effect, and the time is saved.
Description
Technical field
The invention belongs to technical field of biological treatment of wastewater, it is related to one kind with Mathematical Modeling to A/O techniques
Optimize, the method for improving dephosphorization efficiency.
Background technology
A/O biological denitrification process is the abbreviation of anoxia/aerobic biological denitrification process.The denitrification of nitrate nitrogen exists
Run under anoxia condition, the removal of carbonaceous organic material and the nitrification of ammonia nitrogen are run under aerobic condition.The technique
It is that wastewater treatment in China factory applies a kind of most denitrification process.But with expanding economy, phosphorus pollution
Problem is increasingly highlighted, such as anaerobic-aerobic, Phostrip dephosphorization process with dephosphorization as target be able to develop and
Using.As people go deep into denitrogenation dephosphorizing study mechanism, occur in that and take into account denitrogenation and dephosphorization double effects
Sewage treatment process such as A2/ O techniques, Bardenpho techniques, Phoredox techniques, UCT techniques etc..
Biological denitrification phosphorous removal technique receives increasing favor when newly-built sewage treatment plant carries out process choice,
But for being completed the more anoxic-aerobic process of application, how to be protected on the basis of existing process
It has been that pendulum needs solution in face of people to improve dephosphorization efficiency on the premise of card denitrogenation is up to standard by optimizing operation
A problem certainly.
Activated sludge model ASM2d is at present can be while realize the more ripe machine of denitrogenation dephosphorizing simulation
Reason model.Compared with engineering test technology, mathematical simulation has investment reduction, time saving advantage, is
The running optimizatin of sewage treatment project provides a new approach.
The content of the invention
It is an object of the invention to provide a kind of method of raising A/O technique dephosphorization efficiency.
To achieve the above object, the invention provides a kind of method of raising A/O technique dephosphorization efficiency, bag
Include following steps：
Step one, determines influent quality parameter and enters water component parameter；
Step 2, collects the technological parameter of A/O techniques to be optimized；
Step 3, sets up A/O process modelings in the simulation software containing ASM2d models；
Step 4, the parameter that step one and step 2 are drawn is input into the phase of A/O process modeling processing units
Should locate, carry out the calibration of model；
Step 5, volume ratio and sludge age with return sludge ratio, anoxic pond and Aerobic Pond are carried out as variable
The condition simulation of operational factor change, draws the optimal process conditions of phosphor-removing effect.
Wherein, the method also includes：Step 6 is small in laboratory scale with the Optimal Parameters that step 5 draws
Examination or the Optimal Parameters drawn with step 5 in produce reality are run, and simulation knot is verified with result of the test
The reliability of fruit.
Wherein, when A/O process modelings are set up, also need to primarily determine that model parameter.
Wherein, the model parameter that need to be primarily determined that is：Kinetic parameter ammonia oxidation bacteria maximum Specific incremental rate μ A
Take software default value 0.9d-1, second pond clearance be set to 99.8%, water temperature take measured value, excess sludge row
Mud measures measured value.
Wherein, the model parameter for being primarily determined that according to model calibration process repeatedly carries out steady-state simulation, until
Each water quality index analogue value of water outlet of simulation is fitted with Sewage Plant measured value.
Wherein, each water quality index of the water outlet includes total COD CODcr, nitrate nitrogen NH3- N and
Total phosphorus TP.
Wherein, influent quality parameter described in step one is：Total COD CODcr, total triumphant formula nitrogen
TKN, total phosphorus TP, nitrate nitrogen NO3- N, pH, basicity, inorganic suspended solid SS；
Entering water component parameter is：fBS：Fast degradation COD/TCOD；fUP：Non-degradable particle
COD/TCOD；fUS：Non-degradable dissolves COD/TCOD；fNA：NH3-N/TKN；fAC：Acetic acid COD/
Fast degradation COD；fUPN：The content of nitrogen in non-degradable particle COD；fPO4：Phosphate/total phosphorus；
The technological parameter of the A/O techniques to be optimized described in step 2 is：The volume of anoxic pond and Aerobic Pond,
Area, depth, width and dissolved oxygen DO, sedimentation basin volume, area, depth and are entered sludge reflux amount
Water-carrying capacity.
Wherein, the simulation software is Biowin.
The beneficial effects of the invention are as follows：
The present invention in the optimization of A/O techniques, compares the application of mathematical model with engineering test technology, number
Learn advantage of the simulation with investment reduction.Can be quick by the optimizing research to influenceing phosphor-removing effect key parameter
Optimum operating condition is drawn, the time is saved, operating efficiency is improved.
Brief description of the drawings
Fig. 1 be raising A/O technique dephosphorization efficiency of the present invention method in A/O process modeling flow charts；
Fig. 2 is the A/O technique streams after being optimized with the method for raising A/O technique dephosphorization efficiency of the present invention
Cheng Tu.
Specific embodiment
With reference to specific embodiment, the present invention will be further described, but the invention is not restricted to following implementation
Example.
A kind of method of raising A/O technique dephosphorization efficiency, comprises the following steps：
Step one, determines influent quality parameter and enters water component parameter；
Step 2, collects the technological parameter of A/O techniques to be optimized；
Step 3, sets up A/O process modelings in the simulation software containing ASM2d models；
Step 4, the parameter that step one and step 2 are drawn is input into the phase of A/O process modeling processing units
Should locate, carry out the calibration of model；
Step 5, volume ratio and sludge age with return sludge ratio, anoxic pond and Aerobic Pond are carried out as variable
The condition simulation of operational factor change, draws the optimal process conditions of phosphor-removing effect.
Wherein, the method also includes：Step 6 is small in laboratory scale with the Optimal Parameters that step 5 draws
Examination or the Optimal Parameters drawn with step 5 in produce reality are run, and simulation knot is verified with result of the test
The reliability of fruit.
Wherein, when A/O process modelings are set up, also need to primarily determine that model parameter.
Wherein, the model parameter that need to be primarily determined that is：Kinetic parameter ammonia oxidation bacteria maximum Specific incremental rate μ A
Take software default value 0.9d-1, second pond clearance be set to 99.8%, water temperature take measured value, excess sludge row
Mud measures measured value.
Wherein, the model parameter for being primarily determined that according to model calibration process repeatedly carries out steady-state simulation, until
Each water quality index analogue value of water outlet of simulation is fitted with Sewage Plant measured value.
Wherein, each water quality index of the water outlet includes CODcr, NH3- N and TP.
Wherein, influent quality parameter described in step one is：Total COD CODcr, total triumphant formula nitrogen
TKN, total phosphorus TP, nitrate nitrogen NO3- N, pH, basicity, inorganic suspended solid SS；
Entering water component parameter is：fBS：Fast degradation COD/TCOD；fUP：Non-degradable particle
COD/TCOD；fUS：Non-degradable dissolves COD/TCOD；fNA：NH3-N/TKN；fAC：Acetic acid COD/
Fast degradation COD；fUPN：The content of nitrogen in non-degradable particle COD；fPO4：Phosphate/total phosphorus；
The technological parameter of the A/O techniques to be optimized described in step 2 is：The volume of anoxic pond and Aerobic Pond,
Area, depth, width and dissolved oxygen DO, sedimentation basin volume, area, depth and are entered sludge reflux amount
Water-carrying capacity.
Wherein, the simulation software is Biowin.
Embodiment 1
Certain sewage treatment plant uses the composite waste of A/O PROCESS FOR TREATMENTs petrochemical enterprise and sanitary sewage,
Influent quality index：COD 346mg/L、TP 4.27mg/L、NH3-N 15.87mg/L.Actual water outlet refers to
Mark：COD 69.1mg/L、TP 1.96mg/L、NH3-N 0.4mg/L.Current dephosphorization efficiency is poor.
Step one, determines influent quality parameter and enters water component parameter.
Measuring influent quality parameter according to national standard method is：CODcr 346mg/L、TP 4.27mg/L、
TKN 20mg/L、NO3- N 5.57mg/L, pH 7.56, basicity 3.18mg/L, SS 30mg/L.
Entering water component parameter is：fBS 0.532、fUP 0.15、fUS 0.1245、fNA 0.75、fAC 0.214、
fUPN 0.012、fPO4 0.75。
Step 2, collects the technological parameter of A/O techniques to be optimized.
Anoxic pond volume 829404m3, area 1152m2, depth 7.2m, width 16m, dissolved oxygen DO
0mg/L；Aerobic Pond volume 829404m3, area 1152m2, depth 7.2m, width 16m, dissolved oxygen
DO 4.81mg/L；Sedimentation basin volume 11289.6m3, area 3225.6m2, depth 3.5m；Sludge reflux
Amount 28800m3/d；Flow of inlet water 38980m3/d。
Step 3, the emulation using sewage disposal system each unit component parameter and containing ASM2d models
Software sets up A/O process modelings in a computer, also needs to primarily determine that model when setting up A/O process modelings
Parameter.Kinetic parameter AOB (ammonia oxidation bacteria) maximum Specific incremental rate μ A take software default value 0.9d-1,
Second pond clearance is set to 99.8%, and water temperature takes 20 DEG C of measured value, and excess sludge sludge volume is according to measured value
240m3/ d carries out model debugging, repeatedly carries out steady-state simulation, until each water quality index simulation of the water outlet simulated
Value is preferable with the fitting of Sewage Plant measured value.
In Biowin softwares select water inlet, A ponds (1), O ponds (5), second pond, water outlet,
Six processing units of mud discharging, are connected with pipeline, set up reflux pipeline.See Fig. 1.
Step 4, the corresponding position of the parameter input model processing unit that step one and step 2 are drawn, is carried out
The calibration of model.
Step 5, with parameters such as the volume ratio of return sludge ratio, anoxic pond and Aerobic Pond, sludge ages as variable,
The condition simulation of operational factor change is carried out, the optimal process conditions of phosphor-removing effect are drawn.
First suboptimization return sludge ratio.Respectively simulation return sludge ratio be 20%, 30%, 40%, 50%,
60%th, 70%, 80%, 90%, 100% when water outlet result, by simulation result analysis find, backflow
TP, NH during than 50%3The preferable result that-N, CODcr can take simultaneously.
The volume ratio of the second suboptimization anoxic pond and Aerobic Pond.Analog result finds to be changed in O1 ponds in Fig. 1
The removal effect of TP is best afterwards in A2 ponds (former A ponds are A1 ponds), and other specification is not influenceed.See
Fig. 2.
Third time optimization sludge age.Analog result finds that sludge age reduction has to system TP and CODcr removal
Remarkable result.It is shown in Table 1.
The Optimized Simulated result of table 1
| TP(mg/L) | CODcr(mg/L) | NH3-N(mg/L) | |
| Influent quality | 4.27 | 346.0 | 15.87 |
| The current process simulation results of Sewage Plant | 1.64 | 70.2 | 0.31 |
| First suboptimization rear mold intends result | 1.41 | 65.5 | 0.30 |
| Second suboptimization rear mold intends result | 0.78 | 69.0 | 0.52 |
| Analog result after third time optimization | 0.58 | 65.5 | 0.65 |
Step 6, in a set of A/O technological processes of lab design, the water quality of test water is defeated with when simulating
The condition of water quality for entering is consistent, show that optimal conditions are run with step 5, and water analysis is taken out after stable
TP：0.69mg/L、CODcr：68.8mg/L、NH3-N：0.46mg/L.Result of the test and analog result
Fitting effect it is preferable.
Certainly, the present invention can also have other various embodiments, without departing substantially from spirit of the invention and its essence
In the case of, those of ordinary skill in the art can make various corresponding changes and change according to the present invention
Shape, but these corresponding changes and deformation should all belong to the protection domain of the claims in the present invention.
Claims (8)
1. a kind of method of raising A/O technique dephosphorization efficiency, it is characterised in that comprise the following steps：
Step one, determines influent quality parameter and enters water component parameter；
Step 2, collects the technological parameter of A/O techniques to be optimized；
Step 3, sets up A/O process modelings in the simulation software containing ASM2d models；
Step 4, the parameter that step one and step 2 are drawn is input into the phase of A/O process modeling processing units
Should locate, carry out the calibration of model；
Step 5, volume ratio and sludge age with return sludge ratio, anoxic pond and Aerobic Pond are carried out as variable
The condition simulation of operational factor change, draws the optimal process conditions of phosphor-removing effect.
2. the method for raising A/O technique dephosphorization efficiency according to claim 1, it is characterised in that
The method also includes：Step 6, the Optimal Parameters drawn with step 5 are in laboratory scale lab scale or in production
The Optimal Parameters for being drawn with step 5 in practice are run, and the reliability of analog result is verified with result of the test
Property.
3. the method for raising A/O technique dephosphorization efficiency according to claim 1, it is characterised in that
When A/O process modelings are set up, also need to primarily determine that model parameter.
4. the method for raising A/O technique dephosphorization efficiency according to claim 3, it is characterised in that
The model parameter that need to be primarily determined that is：Kinetic parameter ammonia oxidation bacteria maximum Specific incremental rate μ A take software and write from memory
Recognize value 0.9d-1, second pond clearance is set to 99.8%, water temperature and takes measured value, excess sludge spoil disposal to measure reality
Measured value.
5. the method for raising A/O technique dephosphorization efficiency according to claim 1, it is characterised in that
The model parameter primarily determined that according to model calibration process repeatedly carries out steady-state simulation, until the water outlet simulated
Each water quality index analogue value is fitted with Sewage Plant measured value.
6. the method for raising A/O technique dephosphorization efficiency according to claim 5, it is characterised in that
Each water quality index of water outlet includes total COD CODcr, nitrate nitrogen NH3- N and total phosphorus TP.
7. the method for raising A/O technique dephosphorization efficiency according to claim 1, it is characterised in that
Influent quality parameter described in step one is：Total COD CODcr, total triumphant formula nitrogen TKN, total phosphorus
TP, nitrate nitrogen NO3- N, pH, basicity, inorganic suspended solid SS；
Entering water component parameter is：fBS：Fast degradation COD/TCOD；fUP：Non-degradable particle
COD/TCOD；fUS：Non-degradable dissolves COD/TCOD；fNA：NH3-N/TKN；fAC：Acetic acid COD/
Fast degradation COD；fUPN：The content of nitrogen in non-degradable particle COD；fPO4：Phosphate/total phosphorus；
The technological parameter of the A/O techniques to be optimized described in step 2 is：The volume of anoxic pond and Aerobic Pond,
Area, depth, width and dissolved oxygen DO, sedimentation basin volume, area, depth and are entered sludge reflux amount
Water-carrying capacity.
8. the method for raising A/O technique dephosphorization efficiency according to claim 1, it is characterised in that
The simulation software is Biowin.
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| CN201511023423.6A CN106927568A (en) | 2015-12-31 | 2015-12-31 | Method for improving phosphorus removal efficiency of A/O process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116562412A (en) * | 2022-11-16 | 2023-08-08 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693573A (en) * | 2009-09-08 | 2010-04-14 | 中环（中国）工程有限公司 | Optimal design method of AAO process reaction tank |
| CN101746929A (en) * | 2009-12-30 | 2010-06-23 | 中环（中国）工程有限公司 | Optimizing and designing method of AAO process aeration amount |
-
2015
- 2015-12-31 CN CN201511023423.6A patent/CN106927568A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693573A (en) * | 2009-09-08 | 2010-04-14 | 中环（中国）工程有限公司 | Optimal design method of AAO process reaction tank |
| CN101746929A (en) * | 2009-12-30 | 2010-06-23 | 中环（中国）工程有限公司 | Optimizing and designing method of AAO process aeration amount |
Non-Patent Citations (1)
| Title |
|---|
| 沈昌明: "基于模拟的多段A/O工艺除磷能力强化措施研究", 《中国给水排水》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116562412A (en) * | 2022-11-16 | 2023-08-08 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
| CN116562412B (en) * | 2022-11-16 | 2024-02-20 | 广州市净水有限公司 | Low-carbon operation optimization method for sewage biological treatment |
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Application publication date: 20170707 |