CN116161777B - Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature - Google Patents
Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature Download PDFInfo
- Publication number
- CN116161777B CN116161777B CN202211091894.0A CN202211091894A CN116161777B CN 116161777 B CN116161777 B CN 116161777B CN 202211091894 A CN202211091894 A CN 202211091894A CN 116161777 B CN116161777 B CN 116161777B
- Authority
- CN
- China
- Prior art keywords
- ammonia nitrogen
- water
- concentration
- aeration
- control system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 100
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000005273 aeration Methods 0.000 title claims abstract description 48
- 239000010865 sewage Substances 0.000 title claims abstract description 24
- 238000012163 sequencing technique Methods 0.000 claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 8
- 230000015556 catabolic process Effects 0.000 claims abstract description 7
- 238000006731 degradation reaction Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 18
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000006396 nitration reaction Methods 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 22
- 229910021529 ammonia Inorganic materials 0.000 abstract description 11
- 238000007254 oxidation reaction Methods 0.000 abstract description 11
- 230000003647 oxidation Effects 0.000 abstract description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 abstract 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000001651 autotrophic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A control system for controlling partial short-cut nitrification aeration time of municipal sewage based on the concentration of ammonia nitrogen and water temperature of influent water belongs to the technical field of sewage biological treatment. Because the fluctuation of the water quality of the inlet water is larger when the domestic sewage is treated by the two-section partial shortcut nitrification anaerobic ammonia oxidation, in order to solve the problem of excessive aeration of the reactor and provide stable matrix concentration for the anaerobic ammonia oxidation reactor, the invention utilizes the arrangement of an automatic control system in a sequencing batch reactor according to the relation of the degradation rate of activated sludge to ammonia nitrogen, time and water temperature, and comprises an ammonia nitrogen on-line sensor and a PLC control system. The system inputs the NH 4 + -N signals collected on line into an on-line parameter controller, outputs the periodic aeration time through the self-control program of the PLC controller, and timely adjusts the aeration time according to the concentration of the ammonia nitrogen in the inlet water. The invention improves the stability of the two-section partial short-cut nitrification anaerobic ammonia oxidation system, effectively prevents the problems of short-cut nitrification damage caused by overexposure of the reactor, and has simple structure and easy operation.
Description
Technical Field
The invention relates to a control system for controlling partial short-cut nitrification aeration time of municipal sewage based on the concentration of ammonia nitrogen and water temperature of inlet water, and belongs to the technical field of sewage biological treatment. The method is suitable for providing stable substrate concentration for the anaerobic ammonia oxidation reactor when the domestic sewage is treated by two-section partial shortcut nitrification anaerobic ammonia oxidation, solves the problem of over-aeration of the reactor due to large fluctuation of water quality of inflow water, ensures that shortcut nitrification is more stable, provides stable substrate for subsequent anaerobic ammonia oxidation, and realizes high-efficiency energy-saving denitrification of urban sewage.
Background
The short-cut nitrification process is a rapid NO 2 — N production path, and the NH 4 + -N is kept in the NO 2 — N stage through aeration, so that nitrite is prevented from being further oxidized by nitrite oxidizing bacteria through oxygen. Compared with the whole-process nitrification process of the traditional activated sludge method, the short-cut nitrification saves 25% of aeration, shortens the reaction time by more than 50%, has huge engineering application potential, but when the actual domestic sewage short-cut nitrification process is utilized, the operation process is difficult to control, the short-cut nitrification is easy to damage, and the like, so that the engineering application is influenced.
The half-short-cut nitrification-anaerobic ammonia oxidation combined process has the prospect of being widely applied to the treatment of low C/N wastewater. Wherein, about half of ammonia nitrogen is oxidized into nitrite nitrogen in the half-short-cut nitrification process, so that a nitrite nitrogen matrix can be provided for the anaerobic ammonia oxidation process, and the requirement that the molar ratio of the inlet nitrite nitrogen to the ammonia nitrogen is about 1.32 is met, thereby realizing the whole-course autotrophic denitrification of the wastewater. The combined process can save about 60% of oxygen supply energy consumption, and energy consumption and operation cost required by additional carbon sources. The half-cut nitrification process becomes an important pretreatment process for anaerobic ammoxidation. Meanwhile, as the concentration fluctuation of ammonia nitrogen in the urban domestic sewage is larger, the fixed aeration time is likely to cause the over aeration of the reactor, so that the process stability is reduced. Therefore, the means for controlling the half-shortcut nitrification process has important practical application value, and the development of an aeration control system for realizing partial shortcut nitrification based on the concentration of the ammonia nitrogen in the influent water has important significance.
Disclosure of Invention
In order to solve the problem of excessive aeration caused by large fluctuation of the concentration of ammonia nitrogen in the inlet water, the invention provides a control system for controlling the partial short-cut nitrification aeration time of urban sewage based on the concentration of the ammonia nitrogen in the inlet water and the water temperature. The device comprises a sequencing batch reactor with temperature and ammonia nitrogen on-line parameter sensors and a computer automatic control system; the values of the input ammonia nitrogen and the temperature enter the control system, and the aeration time can be automatically output to control partial short-cut nitrification equipment in real time, so that the aim of stably obtaining higher nitrite accumulation is fulfilled.
In order to achieve the aim of stabilizing the effluent by partial short-cut nitrification, the invention provides the following devices:
Sequencing batch reactor (1): an aeration disc (1.7) of an ammonia nitrogen on-line monitoring probe (1.6) of a high-level liquid level meter (1.5) of a 50% drain valve (1.3) and a 75% drain valve (1.4) of a first blow-down pipe (1.2) of a stirrer (1.1); a water outlet reservoir (2): the first overflow pipe (2.1) and the second blow-down pipe (2.2) are arranged in the urban domestic sewage raw water tank (3): a second overflow pipe (3.1), a second blow-down pipe (3.2) and a first water inlet pump (3.3); PLC automatic control system: (4) a PLC control system (4.1); an ammonia nitrogen on-line monitor (4.2); a computer (4.3); draught fan (4.4)
The aeration control of partial shortcut nitrification is realized based on the concentration of ammonia nitrogen in inlet water by using the device, and the method is characterized by comprising the following steps:
a method according to the device, comprising the steps of:
(1) Inoculating short-cut nitrified sludge with ammonia nitrogen to nitrite conversion rate higher than 90%, so that the sludge concentration in SBR is 2000-2500mg/L; starting a water inlet pump, feeding domestic sewage with ammonia nitrogen concentration of 10-40mg/L, feeding water for 30min, turning off the water inlet pump, starting a stirrer, performing anoxic stirring for 120-150min, starting aeration, precipitating for 10-20min, draining for 30min, and limiting for 30min, wherein the drainage ratio of supernatant fluid is 50%;
(2) When the water level reaches a high water level liquid level meter (1.5), the high water level liquid level meter sends out a signal to close a water inlet pump, meanwhile, an ammonia nitrogen on-line monitoring probe (1.6) is started to measure the concentration alpha of NH 4 + -N, the collected signal is displayed by a control panel of an on-line parameter detector and a reaction controller in a digital signal mode, and then an aeration time signal is output after a preset formula and a program in a PLC system are calculated through a computer (4.3);
(2) The device runs the following procedure:
1. When the drain ratio is 50%, 50% of the water in the upper cycle remains after the cycle is completed, and the water intake pump is started (3.1) after the idle time is completed.
2. Feeding water for 30min, and sending a signal from the high water level liquid level meter to the position of a high water level liquid level meter (1.5), and starting an ammonia nitrogen on-line monitor and a temperature sensor when the high water level liquid level meter sends out a signal to close the water feeding pump, and sending data to a PLC (4.1) by the ammonia nitrogen on-line monitor and the temperature sensor to perform data processing;
3. The calculation is performed in the PLC, with the following formula:
note r1=α - β, k=k0 θ (T-20), t=r1/k;
Wherein alpha is ammonia nitrogen concentration when the high water level liquid level meter sends a signal, and is measured by an ammonia nitrogen concentration sensor (1.6); beta is the ammonia nitrogen concentration of the required effluent, is a preset value and is generally set to be 0-10mg/L. R1 is the concentration of ammonia nitrogen degraded in the short-cut nitrification process; k is ammonia nitrogen degradation rate, and the value is 17.34mg N/L h at 25 ℃ under the load of 60mgN/L d; θ is a coefficient of regulating temperature and ammonia nitrogen degradation rate, and the default value is 1.077; t is the water temperature, and is measured by a water temperature sensor; k0 is the standard ammoxidation rate and has a value of 17.34mg N/L h at 25℃under a load of 60mgN/L d; t is the aeration time of the output and is obtained according to the R1 and k values.
4. The calculated numerical value directly controls the power supply time of the fan, thereby achieving the effect of controlling the aeration time.
5. And after the aeration is finished, settling, draining and idle entering the next period according to the value set in the PLC.
The technical principle of the invention is as follows:
The sequencing batch reactor is provided with a temperature and ammonia nitrogen on-line sensor and a set of computer automatic control system. When the water level reaches the high water level and liquid level timing, the high water level and liquid level timing sends out a signal to turn off the water inlet pump, and meanwhile, an ammonia nitrogen on-line monitoring probe is started to measure the concentration alpha of NH 4 + -N, the collected signal is displayed by a control panel of an on-line parameter detector and a reaction controller in a digital signal mode, and then an aeration time signal is output after calculation is performed through a preset formula and a program in a PLC system by a computer; the ammonia nitrogen and nitrite in the effluent are maintained in a certain proportion, so that the short-cut nitrification process is more stable, the optimal substrate concentration is maintained in the subsequent anaerobic ammonia oxidation process, and the system stability is improved.
The aeration control method for realizing partial short-cut nitrification based on the concentration of the ammonia nitrogen in the inlet water has the following advantages:
(1) Compared with the common urban sewage short-cut nitrification device, the device is provided with an on-line sensor in the sequencing batch reactor, and the whole reactor is controlled by a set of complete computer control system. The data collected by the on-line sensor is input into the computer for calculation and then a feedback signal is output to regulate and control the shortcut nitrification process, so that the method is convenient to operate and easy to realize.
(2) Saving a large amount of aeration, realizing autotrophic denitrification, improving the production efficiency of nitrite, being beneficial to the subsequent anaerobic ammoxidation reaction and having low operation cost.
(3) The aeration time of the device is adjusted according to the concentration of the ammonia nitrogen in the inlet water, so that the capability of the system for resisting the change of the quality of the inlet water is improved.
Drawings
FIG. 1 is a logic flow diagram of a control program
FIG. 2 is a schematic diagram of an aeration control system for achieving partial short-cut nitrification based on influent ammonia nitrogen concentration
In fig. 2: sequencing batch reactor (1): an aeration disc (1.7) of an ammonia nitrogen on-line monitoring probe (1.6) of a high-level liquid level meter (1.5) of a 50% drain valve (1.3) and a 75% drain valve (1.4) of a first blow-down pipe (1.2) of a stirrer (1.1); a water outlet reservoir (2): the first overflow pipe (2.1) and the second blow-down pipe (2.2) are arranged in the urban domestic sewage raw water tank (3): a second overflow pipe (3.1), a second blow-down pipe (3.2) and a first water inlet pump (3.3); PLC automatic control system: (4) a PLC control system (4.1); an ammonia nitrogen on-line monitor (4.2); a computer (4.3); draught fan (4.4)
FIG. 3 is a diagram showing the operation effect of the device
Detailed Description
The inlet water is pumped into the sequencing batch reactor from the urban domestic sewage raw water tank (3) through a first inlet pump (3.1); when the water level reaches a high water level liquid level gauge (1.5), a signal is sent to a PLC system (4.1), after the signal is received, a first water inlet pump (3.1) is closed, an ammonia nitrogen on-line monitor (4.2) is started, data are transmitted to the ammonia nitrogen on-line monitor through an ammonia nitrogen on-line probe (1.6), and then the ammonia nitrogen on-line monitor sends the data to the PLC system (4.1) for operation treatment. The treatment results control a fan (4.4) which is connected with an aeration disc (1.7) at the bottom of the sequencing batch reactor. After aeration, settling is carried out according to a preset value, after settling, a PLC system (4.1) sends a signal to a 50% drain valve (1.3), a valve is opened to drain water, and treated water enters a water outlet reservoir (2) for the subsequent anaerobic ammonia oxidation reactor. When the water level is 50%, the water discharge is finished, the water discharge valve is closed, the reactor enters an idle state, and the next period is waited for.
The device is utilized to control accurate partial short-cut nitrification aeration of the urban domestic sewage, and the specific steps are as follows:
The water quality of the aeration grit chamber effluent of a sewage treatment plant in the urban domestic sewage raw water tank in Beijing city is as follows: the chemical oxygen demand is 79mg/L to 180mg/L; ammonia nitrogen 10 mg/L-42 mg/L; nitrite nitrogen concentration is less than 0.02mg/L; nitrate nitrogen 0.1-0.2 mg/L;
(1) Inoculating short-cut nitrified sludge with ammonia nitrogen to nitrite conversion rate higher than 90%, so that the sludge concentration in SBR is 2000-2500mg/L; starting a water inlet pump, feeding domestic sewage with ammonia nitrogen concentration of 10-40mg/L, feeding water for 30min, turning off the water inlet pump, starting a stirrer, performing anoxic stirring for 120-150min, starting aeration, precipitating for 10-20min, draining for 30min, and limiting for 30min, wherein the drainage ratio of supernatant fluid is 50%;
(2) When the water level reaches a high water level liquid level meter (1.5), the high water level liquid level meter sends out a signal to close a water inlet pump, meanwhile, an ammonia nitrogen on-line monitoring probe (1.6) is started to measure the concentration alpha of NH 4 + -N, the collected signal is displayed by a control panel of an on-line parameter detector and a reaction controller in a digital signal mode, and then an aeration time signal is output after a preset formula and a program in a PLC system are calculated through a computer (4.3);
(1) The device of (2) operates as follows:
I. when the drain ratio is 50%, 50% of the water in the upper cycle remains after the cycle is completed, and the water intake pump is started (3.1) after the idle time is completed.
II, feeding water for 30min to a high water level gauge (1.5), starting an ammonia nitrogen on-line monitor and a temperature sensor when the high water level gauge sends out a signal to close a water feeding pump, and sending data to a PLC (4.1) by the ammonia nitrogen on-line monitor and the temperature sensor to perform data processing;
And III, calculating in the PLC, wherein the formula is as follows:
note r1=α - β, k=k0 θ (T-20), t=r1/k;
Wherein alpha is ammonia nitrogen concentration when the high water level liquid level meter sends a signal, and is measured by an ammonia nitrogen concentration sensor (1.6); beta is the ammonia nitrogen concentration of the required effluent, is a preset value and is generally set to be 0-10mg/L. R1 is the concentration of ammonia nitrogen degraded in the short-cut nitrification process; k is ammonia nitrogen degradation rate, and the value is 17.34mg N/L h at 25 ℃ under the load of 60mgN/L d; θ is a coefficient of regulating temperature and ammonia nitrogen degradation rate, and the default value is 1.077; t is the water temperature, and is measured by a water temperature sensor; k0 is the standard ammoxidation rate and has a value of 17.34mg N/L h at 25℃under a load of 60mgN/L d; t is the aeration time of the output and is obtained according to the R1 and k values.
And IV, directly controlling the power supply time of the fan by the calculated numerical value, so as to achieve the effect of controlling the aeration time.
And V, after the aeration is finished, settling, draining and idling according to the value set in the PLC, and entering the next period.
The long-term test results showed that, as shown in fig. 3:
The aeration control system for realizing partial short-cut nitrification based on the concentration of the influent ammonia nitrogen can stably operate, and the automatic control system can effectively control the aeration time in spite of the large change of the concentration of the influent ammonia nitrogen, so that a large amount of aeration is saved, the effluent ammonia nitrogen is controlled within a certain range, autotrophic denitrification is realized, the nitrite production efficiency is improved, and the system is stable to operate for more than one year, thereby being beneficial to the subsequent anaerobic ammonia oxidation reaction and reducing the operation cost. The capability of the system for resisting the change of the water quality of the inlet water is improved.
The control system for controlling the partial short-cut nitrification aeration time of the municipal sewage based on the concentration of the ammonia nitrogen in the inlet water and the water temperature is described in detail, and specific examples are applied to illustrate the principle and the implementation method of the invention, and the description of the above examples is only used for helping to understand the invention and the core idea thereof; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (1)
1. An aeration control method for realizing partial short-cut nitrification based on the concentration of ammonia nitrogen in inlet water is characterized in that the device used by the method comprises the following steps: domestic sewage in the raw water tank (3) enters the sequencing batch reactor (1) through the water inlet pump (3.1); the sequencing batch reactor is connected with a water outlet reservoir through the drain valve (1.3) and the emptying valve (1.2); the operation of the whole sequencing batch reactor is regulated and controlled by a PLC control system (4); an ammonia nitrogen concentration sensor (1.6) and a temperature sensor are arranged in the sequencing batch reactor (1), the sensor can acquire ammonia nitrogen concentration and temperature information and transmit the information to a PLC control system 4 through serial communication to control a fan (3.4);
The method comprises the following steps:
Inoculating short-cut nitrified sludge with ammonia nitrogen to nitrite conversion rate higher than 90%, so that the sludge concentration in SBR is 2000-2500mg/L; starting a water inlet pump, feeding domestic sewage with ammonia nitrogen concentration of 10-40mg/L, feeding water for 30min, turning off the water inlet pump, starting a stirrer, performing anoxic stirring for 120-150min, starting aeration, precipitating for 10-20min, draining for 30min, and limiting for 30min, wherein the drainage ratio is 50%;
When the water level reaches a high water level liquid level gauge (1.5), namely SBR is full, the high water level liquid level gauge sends out a signal to close a water inlet pump, water inlet is stopped, an ammonia nitrogen on-line monitoring probe is started to measure the concentration alpha of NH 4 + -N, the acquired signal is displayed by a control panel of an on-line parameter detector and a reaction controller in a digital signal mode, and then an aeration time signal is output after calculation is performed in a preset formula and program in a PLC system through a computer (4.3);
the device operation program is as follows:
(1) When the drainage ratio is 50%, 50% of water in the upper period remains after the period is finished, and the water inlet pump is started after the idle time is finished;
(2) Feeding water for 30min, starting an ammonia nitrogen on-line monitor and a temperature sensor when the water feeding pump is turned off when a high water level liquid level meter sends out a signal, and sending data to a PLC (programmable logic controller) by the ammonia nitrogen on-line monitor and the temperature sensor for data processing;
(3) The calculation is performed in the PLC, with the following formula:
note r1=α - β, k=k0 θ (T-20), t=r1/k;
Wherein alpha is ammonia nitrogen concentration when the high water level liquid level meter sends a signal, and is measured by an ammonia nitrogen concentration sensor (1.6); beta is the ammonia nitrogen concentration of the required effluent, the preset value is set, and R1 is the ammonia nitrogen concentration degraded in the short-range nitration process; k is ammonia nitrogen degradation rate, and the value is 17.34mg N/L h at 25 ℃ under 60mgN/L d and 17.34mg N/L h at 25 ℃ under 20mgN/L d; θ is a coefficient of regulating temperature and ammonia nitrogen degradation rate, and the default value is 1.077; t is the water temperature, and is measured by a water temperature sensor; k0 is the standard ammoxidation rate and has a value of 17.34mg N/L h at 25℃under a load of 60mgN/L d; t is the aeration time of the output, and is obtained according to the R1 and k values; the calculated numerical value directly controls the power supply time for the fan, so as to achieve the effect of controlling the aeration time; and after the aeration is finished, settling, draining and idle entering the next period according to the value set in the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211091894.0A CN116161777B (en) | 2022-09-07 | 2022-09-07 | Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211091894.0A CN116161777B (en) | 2022-09-07 | 2022-09-07 | Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116161777A CN116161777A (en) | 2023-05-26 |
| CN116161777B true CN116161777B (en) | 2024-04-19 |
Family
ID=86415216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211091894.0A Active CN116161777B (en) | 2022-09-07 | 2022-09-07 | Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116161777B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2683639Y (en) * | 2004-03-26 | 2005-03-09 | 彭永臻 | Real time control apparatus for sewage denitrogenation process by alternative aerobiotic-anoxic activated sludge process |
| CN103112949A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | SBR (sequencing batch reactor) semi-short-distance nitrification process control method |
| JP2015029981A (en) * | 2013-08-07 | 2015-02-16 | 新日鐵住金株式会社 | Nitrite-type nitrification method of ammoniac nitrogen-containing effluent |
| CN105036334A (en) * | 2015-07-27 | 2015-11-11 | 北京工业大学 | Device and method for treating urban sewage through repeated-water-inlet SBR by fully utilizing carbon source in raw water |
| CN105884027A (en) * | 2016-06-17 | 2016-08-24 | 北京工业大学 | Method for starting short-cut nitrification and denitrification by inhibiting nitrite oxidizing bacteria through Cu2+ |
| CN106673205A (en) * | 2016-12-12 | 2017-05-17 | 同济大学 | Rapid start method for integrated autotrophic denitrification system |
-
2022
- 2022-09-07 CN CN202211091894.0A patent/CN116161777B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2683639Y (en) * | 2004-03-26 | 2005-03-09 | 彭永臻 | Real time control apparatus for sewage denitrogenation process by alternative aerobiotic-anoxic activated sludge process |
| CN103112949A (en) * | 2013-02-03 | 2013-05-22 | 北京工业大学 | SBR (sequencing batch reactor) semi-short-distance nitrification process control method |
| JP2015029981A (en) * | 2013-08-07 | 2015-02-16 | 新日鐵住金株式会社 | Nitrite-type nitrification method of ammoniac nitrogen-containing effluent |
| CN105036334A (en) * | 2015-07-27 | 2015-11-11 | 北京工业大学 | Device and method for treating urban sewage through repeated-water-inlet SBR by fully utilizing carbon source in raw water |
| CN105884027A (en) * | 2016-06-17 | 2016-08-24 | 北京工业大学 | Method for starting short-cut nitrification and denitrification by inhibiting nitrite oxidizing bacteria through Cu2+ |
| CN106673205A (en) * | 2016-12-12 | 2017-05-17 | 同济大学 | Rapid start method for integrated autotrophic denitrification system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116161777A (en) | 2023-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110002592B (en) | Device and method for treating domestic sewage by coupling short-cut denitrification-sludge fermentation with anaerobic ammonia oxidation system | |
| CN101759290B (en) | Method for rapidly realizing and stably maintaining shortcut nitrification in continuous flow process | |
| CN107162186B (en) | Device and method for urban sewage anaerobic ammonia oxidation autotrophic nitrogen removal based on granular sludge | |
| CN109110922B (en) | Double-carbon source adding method and system for denitrification deep bed filter | |
| CN110372088B (en) | Method for rapidly starting shortcut nitrification of municipal domestic sewage by intervention of hydroxylamine hydrochloride | |
| CN108862579B (en) | System and method for realizing urban sewage integrated shortcut nitrification anaerobic ammonia oxidation efficient denitrification by controlling DO in real time | |
| CN112250175B (en) | Device and method for realizing deep denitrification of municipal sewage by virtue of integrated shortcut nitrification-anaerobic ammonia oxidation coupling with endogenous shortcut denitrification | |
| CN102079609B (en) | Quick start method for short-range deep denitrification by SBR (Sequencing Batch Reactor) process at low temperature | |
| CN104962505A (en) | Immobilized nitrobacteria enrichment culture method and device in sewage treatment process | |
| CN100498832C (en) | Device and method for quickly realizing short range biological denitrification by salinity suppressing combined with fuzzy control | |
| CN102701441B (en) | Method for regulating and controlling nitrogen proportion of partial nitrosation effluent of low-ammonia-nitrogen continuous stirred-tank reactor (CSTR) at normal temperature | |
| CN109809560B (en) | Device and method for accurately feeding and controlling carbon source in multi-point water inlet multi-stage A/O process | |
| CN105036334A (en) | Device and method for treating urban sewage through repeated-water-inlet SBR by fully utilizing carbon source in raw water | |
| CN112479370A (en) | Sewage autotrophic nitrogen removal device and method | |
| CN109879412B (en) | Device for realizing advanced treatment of secondary effluent of municipal sewage by partial reduction coupling ammonia oxidation of nitrate and real-time control method | |
| CN110723815B (en) | Method for rapidly realizing shortcut nitrification of municipal sewage through traditional activated sludge | |
| CN103382051B (en) | Apparatus and method used for enhancing low-temperature bio-nitrification effects | |
| CN113415899B (en) | Device and method for deep denitrification based on adsorption hydrolysis coupling short-range denitrification serial anaerobic ammonia oxidation of slow degradation organic matters | |
| CN106477720B (en) | Short-cut denitrification reactor and quick start method of short-cut denitrification process | |
| CN113480001A (en) | Two-stage hydrolysis acidification short-cut denitrification anaerobic ammonia oxidation process for removing nitrogen by taking granular organic matters as carbon source | |
| CN109879428B (en) | Method for realizing short-cut denitrification process of municipal sewage by using delayed anaerobic/low-carbon anoxic SBR | |
| CN116161777B (en) | Control system for controlling partial short-cut nitrification aeration time of municipal sewage based on influent ammonia nitrogen concentration and water temperature | |
| CN208700677U (en) | A kind of room temperature low ratio of carbon to ammonium city domestic sewage short distance nitration device for rapidly starting | |
| CN108862587B (en) | Device and method for treating high ammonia nitrogen wastewater and domestic sewage by combining continuous flow shortcut nitrification/anaerobic ammonium oxidation with DEAMOX | |
| CN110563156A (en) | SBBR sewage treatment device and method for efficiently removing nitrogen and phosphorus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |