CN109279695A - A kind of AO technique denitrification carbon source adds optimal control device - Google Patents
A kind of AO technique denitrification carbon source adds optimal control device Download PDFInfo
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- CN109279695A CN109279695A CN201811177832.5A CN201811177832A CN109279695A CN 109279695 A CN109279695 A CN 109279695A CN 201811177832 A CN201811177832 A CN 201811177832A CN 109279695 A CN109279695 A CN 109279695A
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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
- C02F3/006—Regulation methods for biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- Biodiversity & Conservation Biology (AREA)
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a kind of AO technique denitrification carbon source and adds in optimal control device, including the pond A, the pond O, first pipe, second pipe, third pipeline, blender, feed water flow meter, influent COD analyzer, influent ammonia nitrogen analyzer, dissolved oxygen instrument, the first nitrate nitrogen sensor and analyzer, the second nitrate nitrogen sensor and analyzer, frequency conversion that reflux pump, central control system, carbon source add flowmeter, frequency conversion carbon source adds pump and carbon source case；The present invention solves the problems, such as that denitrogenation stability existing for traditional biological A/O denitrogenation technology is poor, low efficiency, delay of feedback, and presently, there are control precision it is inadequate, easily cause carbon source to waste, increase production cost, it is difficult to guarantee stable water outlet problem up to standard.
Description
Technical field
The present invention relates to sewage treatment fields more particularly to a kind of AO technique denitrification carbon source to add optimal control device.
Background technique
In recent years, with the publication of " urban wastewater treatment firm pollutant emission standard " (exposure draft), prefectures and cities' phase
After having issued provincial standard, it is specified that the more harsh emission limit of each contamination index of town sewage plant.Sewage treatment it is main
Contradiction has gradually been changed into the removal of nitrogen and phosphorus pollutants by the removal of organic pollutant, and all sewage plants must be provided with necessary
Treatment facility further increases the denitrifying capacity of sewage treatment plant, improves the removal efficiency to TN.
Biological denitrification process is broadly divided into two parts, i.e., is nitrate nitrogen by mineralized nitrogen by nitrification, then pass through
Denitrification converts nitrogen from water for nitrate nitrogen and escapes, to reach the removal of nitrogen.Traditional A/O technique lacks leading portion
Oxygen section and back segment aerobic section are cascaded, and A sections of DO are not more than 0.2mg/L, O sections of O=2~4mg/L.It is incited somebody to action in anoxic section heterotroph
The pollutants such as protein, fat carry out ammonification and dissociate ammonia (NH3, NH4+), and under sufficient oxygen supply condition, the nitrification of autotrophic bacterium is made
Be oxidized to NO3- with by NH3-N (NH4+), by flow back control be back to the pond A, under anoxic conditions, heterotrophic bacteria absorb carbon source into
NO3- is reduced to molecular nitrogen (N2) by row denitrification, realizes sewage water denitrification.Anoxic section denitrification needs to consume carbon
Source needs additionally to carry out carbon source to add, denitrification can be made to be normally carried out when water inlet cannot provide enough carbon sources.
Current existing carbon source, which adds control mode, mainly to be had: one, with the mean concentration for mean flow meter ammonia nitrogen of intaking, through counting
It calculates and determines that carbon source adds concentration, and after being achieved the desired results by debugging, fixed carbon source adds pump discharge, in a certain range,
Carbon source, which adds, to remain unchanged；Two, it using flow of inlet water, ammonia nitrogen concentration as foundation, is calculated by PLC (programmable logic controller (PLC))
Theoretical carbon source dosage, control carbon source add the flow of pump；Three, it using flow of inlet water, ammonia nitrogen concentration as foundation, (can be compiled by PLC
Journey logic controller) theoretical carbon source dosage is calculated, control carbon source adds pump and adds, meanwhile, acquisition water outlet nitrate concentration
Signal feeds back to PLC, and it is to think to add carbon source deficiency that it is excessively high, which to be such as discharged nitrate concentration, to increase dosage, is such as discharged nitre
Hydrochlorate concentration is too low, that is, thinks to add carbon source excess, so that dosage is reduced, in this, as the amendment side of theoretical carbon source dosage
Formula reduces risk of exceeding criterion.
The first control mode substantially belongs to quantitatively add, and due to sewage plant raw water water, water quality is seasonal, fluctuates in the daytime
Equal variations are big, and how this kind of control mode water inlet nitrate concentration and amount of inlet water change, and carbon source pumps equal constant speed drive.This kind control
If nitrate concentration is lower in mode raw water processed, the excess that may cause carbon source is added, and causes organic concentration mistake in water outlet
Height, while causing the waste of carbon source；If nitrate concentration is higher in raw water, it may cause carbon source dosage deficiency, cause
Water nitrate concentration is excessively high, and water outlet total nitrogen (TN) is exceeded.Second of control mode, using flow of inlet water and ammonia nitrogen concentration as foundation,
The theory being calculated adds value and needs to have biggish difference compared with engineering practice, improper so as to cause carbon source dosage, exceeded
Risk is larger, can only be by artificially correcting PLC parameter after exceeded, and management difficulty is larger, risk of exceeding criterion often occurs.The third control
Second more simple of control mode of mode processed improves to some extent, can be by being discharged nitrate nitrogen parameter in case of over-standard phenomenon
When being fed back, then add and be modified to carbon source, but being discharged exceeded, it is difficult immediately to be modified PLC control system, repairs
After changing dosage, need to be delayed at least experience sewage after the residence time of biochemistry pool.
Above-mentioned three kinds of control modes individually add carbon source and control, but ignore only in accordance with the nitrogen index of Inlet and outlet water
A/O operational characteristic, it is characterized in that nitrification liquid to be back to preposition anti-nitration reaction pond, denitrification by interior reflux pump
Reaction condition and removal efficiency influenced by interior reflux it is very big.Opposite flow of inlet water, interior regurgitant volume is too low to will cause anoxic zone
Denitrification potential cannot make full use of, the decline of the removal rate upper limit, meanwhile, primary carbon source flow to area aerobic zone in water inlet, increases system
System oxygen demand；And regurgitant volume is excessively high, on the one hand increases reflux required cost, while a large amount of dissolved oxygen in aerobic zone can be made to enter and lacked
Therefore, it is badly in need of a kind of control system that can solve the above problem to destroy denitrification environment in oxygen area.
Summary of the invention
Technical problems to be solved
It is mutual with interior regurgitant volume comprehensively control by the control of carbon source dosing system that the problem to be solved in the present invention is to provide a kind of
In conjunction with eliminating a large amount of theoretical calculation bring error, realize vital " quick response ", obtain more accurate
Carbon source injected volume controls data, to save the medicament expense of carbon source and the control system of electric energy, obviously to overcome existing skill
The defects of art.
Technical solution
To solve the technical problem, the present invention provides a kind of AO technique denitrification carbon source and adds optimal control device, wraps
Include the pond A, the pond O, first pipe, second pipe, third pipeline, blender, feed water flow meter, influent COD analyzer, influent ammonia nitrogen
It flows back in analyzer, dissolved oxygen instrument, the first nitrate nitrogen sensor and analyzer, the second nitrate nitrogen sensor and analyzer, frequency conversion
Pump, central control system, carbon source add flowmeter, frequency conversion carbon source adds pump and carbon source case, it is characterised in that: the one of the pond A
Side is provided with the pond O, and a upper side in the pond A is connected with the 8th pipeline, be provided on the 8th pipeline feed water flow meter, into
Water COD analyzer and influent ammonia nitrogen analyzer, the feed water flow meter, influent COD analyzer and influent ammonia nitrogen analyzer difference
It is connected by data line with central control system, the central control system is connected by data line with reflux pump in frequency conversion, institute
State the inside bottom that the pond O is arranged in reflux pump in frequency conversion, the water outlet phase of one end of the second pipe and reflux pump in frequency conversion
Even, the other end of the second pipe is connected to a upper side in the pond A；The dissolved oxygen instrument and the first nitrate nitrogen sensor and survey
Determine instrument the inside in the pond A is arranged in and is connected by data line with central control system respectively；The second nitrate nitrogen sensor and
Analyzer is arranged in the inside in the pond O and is connected by data line with central control system；One end of the third pipeline is connected to
The side lower end of carbon source case, the other end of the third pipeline and the inside in the pond A are interconnected, and are provided on the third pipeline
Carbon source adds flowmeter and frequency conversion carbon source adds pump, and the carbon source adds flowmeter and frequency conversion carbon source adds pump and passes through data respectively
Line is connected with central control system；The inner upper of carbon source case is arranged in the blender.
Preferably, the influent COD analyzer is located at the downstream side of feed water flow meter, and the influent ammonia nitrogen analyzer is located at
The downstream side of influent COD analyzer.
Preferably, the carbon source adds flowmeter and is located at the upstream side that frequency conversion carbon source adds pump.
The invention patent feature:
The present invention solves poor denitrogenation stability existing for traditional biological A/O denitrogenation technology, low efficiency, delay of feedback and asks
Topic, and presently, there are control precision it is inadequate, easily cause carbon source to waste, increase production cost, it is difficult to guarantee that stable water outlet reaches
Target problem.
Compared with existing A/O technique carbon source adds control mode, method provided by the invention can remove a large amount of theoretical meter from
Calculate bring error may be implemented vital " quick response ", obtains more in conjunction with a large amount of historical datas and empirical equation
Accurate carbon source injected volume controls data, to obviously save the medicament expense and electric energy of carbon source.
Have the beneficial effect that the present invention eliminates a large amount of theoretical calculation bring error, in conjunction with a large amount of historical datas and warp
Formula is tested, vital " quick response " may be implemented, more accurate carbon source injected volume control data are obtained, thus obviously
The medicament expense and electric energy of carbon source are saved, denitrogenation stability existing for traditional biological A/O denitrogenation technology is poor, imitates to solve
The problem of rate is low, delay of feedback, and presently, there are control precision it is inadequate, easily cause carbon source to waste, increase production cost, it is difficult
To guarantee stable water outlet problem up to standard.
Detailed description of the invention
Fig. 1 is the structure principle chart that a kind of AO technique denitrification carbon source of the present invention adds optimal control device.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Figure 1, a kind of AO technique denitrification carbon source of the invention adds optimal control device, including the pond A 104, the pond O
105, first pipe 114, second pipe 115, third pipeline 116, blender 117, feed water flow meter 101, influent COD analyzer
102, influent ammonia nitrogen analyzer 103, dissolved oxygen instrument 106, the first nitrate nitrogen sensor and analyzer 107, the second nitrate nitrogen sensing
Reflux pump 109, central control system 110, carbon source add flowmeter 111 in device and analyzer 108, frequency conversion, frequency conversion carbon source adds
Pump 112 and carbon source case 113；The side in the pond A 104 is provided with the pond O 105, and a upper side in the pond A 104 is connected with the 8th pipeline 121,
Feed water flow meter 101, influent COD analyzer 102 and influent ammonia nitrogen analyzer 103, influent COD are provided on 8th pipeline 121
Analyzer 102 is located at the downstream side of feed water flow meter 101, and influent ammonia nitrogen analyzer 103 is located under influent COD analyzer 102
Side is swum, feed water flow meter 101, influent COD analyzer 102 and influent ammonia nitrogen analyzer 103 are controlled by data line and center respectively
System 110 processed is connected, and central control system 110 is connected by data line with reflux pump 109 in frequency conversion, reflux pump 109 in frequency conversion
The inside bottom in the pond O 105 is set, and one end of second pipe 115 is connected with the water outlet of reflux pump 109 in frequency conversion, the second pipe
The other end in road 115 is connected to a upper side in the pond A 104；Dissolved oxygen instrument 106 and the first nitrate nitrogen sensor and analyzer 107
The inside in the pond A 104 is set and is connected respectively by data line with central control system 110；Second nitrate nitrogen sensor and survey
Determine instrument 108 inside in the pond O 105 is arranged in and is connected by data line with central control system 110；One end of third pipeline 116
It is connected to the side lower end of carbon source case 113, the other end of third pipeline 116 and the inside in the pond A 104 are interconnected, third pipeline
It is provided with that carbon source adds flowmeter 111 and frequency conversion carbon source adds pump 112 on 116, carbon source adds flowmeter 111 and is located at frequency conversion carbon source
The upstream side of pump 112 is added, carbon source adds flowmeter 111 and frequency conversion carbon source adds pump 112 and controls respectively by data line and center
System 110 processed is connected；The inner upper of carbon source case 113 is arranged in blender 117, plays the role of stirring evenly；Center control
System 10 processed is analyzed with signal, and data calculate, processing, record and control signal sending function.
Present system controls signal and forms three groups of loops, and (1) feedback control loop routes influent COD analyzer 102, water inlet
Flowmeter 101, influent ammonia nitrogen analyzer 103 and dissolved oxygen instrument 106 generate and the feedback signal after the processing of central control system 110
To reflux pump 109 in frequency conversion, to judge whether to meet the service condition of A/O technological parameter setting；(2) feedback control loop routing the
Dinitric acid nitrogen sensor and analyzer 108 generate and after the processing of central control system 110 feedback signal to reflux pump in frequency conversion
109, maintain the concentration of nitrate nitrogen of water outlet in the pond O to be in setting value.(3) first nitrate nitrogen sensors and analyzer 107
Feedback signal feedbacks and controls frequency conversion carbon source after the processing of central control system 110 and adds pump 112, maintains water outlet in the pond A
The concentration of nitrate nitrogen be in setting value.
Optimal control device device is added using AO technique denitrification carbon source of the invention to carry out traditional A/O technique carbon source
The method for adding control system comprising following steps:
1) water inlet Initial operation:
Present system and A/O denitrification process process start operation simultaneously, are primarily based on influent COD collected, water inlet
Flow, influent ammonia nitrogen, water outlet nitrate nitrogen setting value, according to the flow value of reflux pump 109 in theoretical calculation generation frequency conversion, and according to
109 traffic frequency relation curve of reflux pump in the frequency conversion stored in central control system 110 forms reflux pump 109 in frequency conversion
Control signal feeds back to the pump.
Calculation formula: η=(water inlet TN- is discharged the TN)/water inlet TN=(influent ammonia nitrogen × pond coefficient 1-O nitrate nitrogen × coefficient
2)/(influent ammonia nitrogen × coefficient 1)；Reflux ratio r=η/(1- η)；
Carbon source adds pump initial stage control: C=influent ammonia nitrogen × coefficient 3- influent COD × coefficient 4；
Coefficient value is measured by lab scale.
2) judgement of stable operation stage parameter is handled:
The pond A dissolved oxygen maintains setting value 0.5mg/L hereinafter, maintaining the pond O water outlet by adjusting fan operation parameter first
For dissolved oxygen in 2~4mg/L, which is the routine operation management of the pond sewage plant O, for simplified present system, is not included in central control
System.Secondly, 109 flow of reflux pump in frequency conversion is reduced, as the pond A dissolved oxygen≤0.5mg/L as the pond A dissolved oxygen > 0.5mg/L
When, 109 flow of reflux pump maintains in frequency conversion.
It sets the pond O and is discharged nitrate control value, the setting value is mainly according to the expected processing target assessment of A/O system, setting
Nitrate control range: (setting value -3mg/L)≤pond O is discharged nitrate nitrogen≤(setting value -1mg/L), reflux pump 109 in frequency conversion
In frequency converter according to setting water outlet the concentration of nitrate nitrogen processing frequency；The pond O water outlet nitrate nitrogen does not meet controlling value, and meets O
Pond is discharged the concentration of nitrate nitrogen < (setting value -3mg/L), then reduces by 109 flow of reflux pump in frequency conversion；The pond O water outlet nitrate nitrogen is not inconsistent
Controlling value is closed, and meets the pond O and is discharged the concentration of nitrate nitrogen > setting value -3mg/L, then increases by 109 flow of reflux pump in frequency conversion；The pond O goes out
Water nitrate nitrogen is eligible 2., then to the pump discharge that flows back in the maintenance pond O.
Set the pond A and be discharged nitrate control value, according to the operation experience that sewage plant optimizes, limit value control 1~
2mg/L, is able to achieve the optimization of system, the setting pond 1mg/L≤A water outlet nitrate nitrogen≤2mg/L (condition is 3.), and the water outlet of the pond A is unsatisfactory for
Controlling value, and meet the pond A water outlet nitrate nitrogen < 1mg/L, then flow and frequency relation curve are added according to carbon source, reduces respective tones
Rate reduces frequency conversion carbon source and adds 112 flows of pump, reduces carbon source and use；The water outlet of the pond A is unsatisfactory for controlling value, and meets the pond A water outlet nitre
Sour nitrogen > 2mg/L then adds flow and frequency relation curve according to carbon source, increases corresponding frequencies, increases frequency conversion carbon source and adds pump
112 flows；The water outlet of the pond A meets controlling value, then maintains carbon source to add flow.
3) quick response carbon source adds the stage:
Central control system 110, which records and stores, to be run meter parameter and frequency conversion carbon source each time and adds pump 112, in frequency conversion
Reflux pump 109, by the historical record of certain phase, the historical record that system will build up on carries out curve fitting, and will return in frequency conversion
The controlling value of stream pump 109 is used as unknown function, flow of inlet water collected, COD, ammonia nitrogen, dissolved oxygen, the pond O water outlet nitrate nitrogen work
For control function, fitting obtains calculation formula；The controlling value that frequency conversion carbon source is added pump 112 simultaneously is adopted as unknown function
The flow of inlet water that integrates, ammonia nitrogen, the pond A the concentration of nitrate nitrogen, calculates in gained frequency conversion that 109 parameter of reflux pump is control function at COD, root
The control signal that frequency conversion carbon source adds pump 112 is calculated according to the curve of fitting, realizes that carbon source adds the quick response of adjusting.Curve is quasi-
It closes and uses polynomial curve fitting or least square curve fitting.
By the curve that a large amount of history valid data are fitted, the parameter that can directly measure instrument brings curve into, to count
Calculation obtains the practical controlling value of carbon source dosage.The adjusting data that this stage is formed similarly are used as storage of history data P in system
In, as the adjusting foundation of the operation of system from now on, pump 112 periodically is added to reflux pump 109 in the frequency conversion of fitting and frequency conversion carbon source
Parameter curve is modified, so that curve is more accurate effectively.
In conclusion it is restricted embodiment of the invention, all those skilled in the art that above embodiment, which is not,
The modification carried out on the basis of substantive content of the invention or equivalent deformation, in technology scope of the invention.
Claims (3)
1. a kind of AO technique denitrification carbon source adds optimal control device, including the pond A, the pond O, first pipe, second pipe, third
Pipeline, blender, feed water flow meter, influent COD analyzer, influent ammonia nitrogen analyzer, dissolved oxygen instrument, the first nitrate nitrogen sensor
And reflux pump, central control system, carbon source add flowmeter, become in analyzer, the second nitrate nitrogen sensor and analyzer, frequency conversion
Frequency carbon source adds pump and carbon source case, it is characterised in that: the side in the pond A is provided with the pond O, the upper side connection in the pond A
There is the 8th pipeline, feed water flow meter, influent COD analyzer and influent ammonia nitrogen analyzer are provided on the 8th pipeline, it is described
Feed water flow meter, influent COD analyzer and influent ammonia nitrogen analyzer pass through data line respectively and are connected with central control system, described
Central control system is connected by data line with reflux pump in frequency conversion, and the inside bottom in the pond O is arranged in reflux pump in the frequency conversion,
One end of the second pipe is connected with the water outlet of reflux pump in frequency conversion, and the other end of the second pipe is connected to the pond A
One upper side；The dissolved oxygen instrument and the first nitrate nitrogen sensor and analyzer are arranged in the inside in the pond A and pass through data respectively
Line is connected with central control system；The second nitrate nitrogen sensor and analyzer are arranged in the inside in the pond O and pass through data line
It is connected with central control system；One end of the third pipeline is connected to the side lower end of carbon source case, the third pipeline it is another
The inside in one end and the pond A is interconnected, and is provided with that carbon source adds flowmeter and frequency conversion carbon source adds pump, institute on the third pipeline
State that carbon source adds flowmeter and frequency conversion carbon source adds pump and is connected respectively by data line with central control system；The blender is set
Set the inner upper in carbon source case.
2. a kind of AO technique denitrification carbon source according to claim 1 adds optimal control device, it is characterised in that: described
Influent COD analyzer is located at the downstream side of feed water flow meter, and the influent ammonia nitrogen analyzer is located at the downstream of influent COD analyzer
Side.
3. a kind of AO technique denitrification carbon source according to claim 1 adds optimal control device, it is characterised in that: described
Carbon source adds flowmeter and is located at the upstream side that frequency conversion carbon source adds pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177832.5A CN109279695A (en) | 2018-10-10 | 2018-10-10 | A kind of AO technique denitrification carbon source adds optimal control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177832.5A CN109279695A (en) | 2018-10-10 | 2018-10-10 | A kind of AO technique denitrification carbon source adds optimal control device |
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| CN109279695A true CN109279695A (en) | 2019-01-29 |
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| CN201811177832.5A Withdrawn CN109279695A (en) | 2018-10-10 | 2018-10-10 | A kind of AO technique denitrification carbon source adds optimal control device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704463A (en) * | 2019-02-26 | 2019-05-03 | 沧州市供水排水集团有限公司 | A kind of AAO process spent water treatment plant carbon source optimizing dosing system |
| 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 |
| CN111960533A (en) * | 2020-06-02 | 2020-11-20 | 西安热工研究院有限公司 | Novel carbon source adding optimization control device and method |
| CN113307365A (en) * | 2021-06-18 | 2021-08-27 | 清华苏州环境创新研究院 | Device and method for automatically determining optimal adding ratio and continuous adding stabilization time of denitrification carbon source |
-
2018
- 2018-10-10 CN CN201811177832.5A patent/CN109279695A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704463A (en) * | 2019-02-26 | 2019-05-03 | 沧州市供水排水集团有限公司 | A kind of AAO process spent water treatment plant carbon source optimizing dosing system |
| CN109704463B (en) * | 2019-02-26 | 2024-03-26 | 沧州市供水排水集团有限公司 | Carbon optimization feeding system of AAO process sewage treatment plant |
| 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 |
| CN111960533A (en) * | 2020-06-02 | 2020-11-20 | 西安热工研究院有限公司 | Novel carbon source adding optimization control device and method |
| CN113307365A (en) * | 2021-06-18 | 2021-08-27 | 清华苏州环境创新研究院 | Device and method for automatically determining optimal adding ratio and continuous adding stabilization time of denitrification carbon source |
| CN113307365B (en) * | 2021-06-18 | 2023-03-21 | 清华苏州环境创新研究院 | Device and method for automatically determining optimal adding ratio and continuous adding stabilization time of denitrification carbon source |
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Application publication date: 20190129 |