CN105731630B - The aeration air quantity control method of water treatment system and the system - Google Patents
The aeration air quantity control method of water treatment system and the system Download PDFInfo
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- CN105731630B CN105731630B CN201510983862.5A CN201510983862A CN105731630B CN 105731630 B CN105731630 B CN 105731630B CN 201510983862 A CN201510983862 A CN 201510983862A CN 105731630 B CN105731630 B CN 105731630B
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge 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
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/38—Gas flow rate
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- 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
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- Health & Medical Sciences (AREA)
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- Activated Sludge Processes (AREA)
Abstract
The present invention provides the water treatment system of the energy air capacity that suitable control is supplied to the mixed liquor of aerobic slot and the aeration air quantity control method of the system.Water treatment system has: measurement is equipped with the first survey ammonia meter of active sludge intermixture ammonia nitrogen concentration in the aerobic slot of aerator；Measurement flows into the second survey ammonia meter of the ammonia nitrogen concentration of the raw water of a series of biological reaction tank；Aeration air quantity controller based on the object run amount control aerator aeration air quantity as aerator aeration air quantity target value；Generate the aeration Wind Coverage Calculation device of object run amount；Aeration Wind Coverage Calculation device includes the feedback control system of the first operating quantity computing unit including generating feedback target operating quantity signal；The feedforward control system of the second operating quantity computing unit of antecedent goal operating quantity signal is generated including the variable quantity in the unit time according to the ammonia nitrogen concentration of raw water；Feedback target operating quantity signal and antecedent goal operating quantity signal are carried out to the add operation unit of add operation.
Description
Technical field
The present invention relates to be set to sewage disposal device etc. and have at the water of the biological reaction tank including aerobic slot
Reason system.More particularly to the control of the aeration air quantity of the aerobic slot in above-mentioned water treatment system.
Background technique
Conventionally, there is known using the water treatment system of activated sludge purification draining in the drainage sunk well of living drainage etc..
Such water treatment system for example has the raw water slot for storing raw water (flowing into sewage), the work mixed to raw water and activated sludge
Property mud mixed liquid (hereinafter referred to as " mixed liquor ") in polluter carry out biological treatment a series of biological reaction tank,
With the precipitation tank of the precipitation and separation sludge from mixed liquor.A series of biological reaction tank includes anaerobism groove, anaerobic groove and aerobic
Slot etc. carries out the polluters such as the carbons organic matter, nitrogenous compound, the phosphorus-containing compound that contain in raw water in these reactive tanks
Removal.
Has the aerator for being aerated to mixed liquor in above-mentioned water treatment system, in aerobic slot.By right
Mixed liquor is aerated, and the dissolved oxygen concentration in the movable required mixed liquor of active sludge microorganism, Huo Zheke can be improved
To be stirred to mixed liquor.When air capacity (hereinafter referred to as " the aeration wind supplied by aerator to the mixed liquor of aerobic slot
Amount ") it is insufficient when, handle the water quality deterioration of water.
This problem in order to prevent is proposed and is carried out based on aeration air quantity of the ammonia nitrogen concentration in aerobic slot to aerobic slot
The structure (referring to patent document 1) of feedback control.In addition, also a series of to flowing into other than the ammonia nitrogen concentration in aerobic slot
Biological reaction tank in the ammonia nitrogen concentration of raw water be measured, and based on the ammonia nitrogen concentration of raw water to aeration air quantity into
The structure of row feedforward control is also suggested (referring to patent document 2).
Existing technical literature:
Patent document:
Patent document 1: Japanese Unexamined Patent Publication 2005-199116 bulletin；
Patent document 2: Japanese Unexamined Patent Publication 2012-66231 bulletin.
Summary of the invention
Problems to be solved by the invention:
However, it is difficult similarly to exist in the structure for also carrying out feedforward control other than feedback control as described above
The case where to reach aeration air quantity appropriate.
The present invention is formed in view of the above problems, and the purpose is to provide to suitably control to the mixed liquor of aerobic slot to supply
The water treatment system for the air capacity given and the aeration air quantity control method of the system.
The means solved the problems, such as:
A kind of water treatment system of form according to the present invention has: having the aerobic slot for being equipped with aerator and setting
The anaerobism groove of at least more than one or anaerobic groove in the upstream side of the aerobic slot, and water process is carried out based on activated sludge process
A series of biological reaction tank；Measure the ammonia nitrogen concentration of the active sludge intermixture of the aerobic slot first surveys ammonia meter；
Measurement flows into the second survey ammonia meter of the ammonia nitrogen concentration of the raw water of a series of biological reaction tank；Based on as the aeration
The object run amount of the target value of the aeration air quantity of device controls the aeration Boiler pressure control dress of the aeration air quantity of the aerator
It sets；With the aeration Wind Coverage Calculation device for generating the object run amount；The aeration Wind Coverage Calculation device includes feedback control system
System, which includes between the ammonia nitrogen concentration of the active sludge intermixture based on the aerobic slot and its setting value
Deviation generate feedback target operating quantity signal the first operating quantity computing unit；Feedforward control system, the feedforward control system
The second of antecedent goal operating quantity signal is generated including the variable quantity in the unit time according to the ammonia nitrogen concentration of the raw water
Operating quantity computing unit；With add operation unit, the add operation unit is by the feedback target operating quantity signal and described
Antecedent goal operating quantity signal carries out add operation and generates the object run amount.
According to above structure, the ammonia nitrogen concentration of the active sludge intermixture based on aerobic slot executes feedback control, and holds
Row feedforward control corresponding with the variable quantity in the unit time of raw water ammonia nitrogen concentration.It, can be from raw water ammonia by means of this
Having started of state nitrogen concentration variation changes aeration air quantity matchedly, therefore even with being difficult to chase after by feedback control
With ammonia nitrogen concentration change dramatically, can also control as aeration air quantity appropriate.Also, the value of the ammonia nitrogen concentration in raw water
In lesser situation of higher but in the unit time variable quantity itself, the aeration air quantity carried out by feedforward control can reduce
Variation.In this case, it only just can sufficiently be coped with by feedback control, therefore inhibit the mistake because of caused by feedforward control
The variation of surplus aeration air quantity may be controlled to aeration air quantity appropriate and seek the saving of electric power.
It is also possible to the second operating quantity computing unit to be formed as such as flowering structure: calculates dense with the ammoniacal nitrogen of the raw water
The corresponding antecedent goal operating quantity of variable quantity in the unit time of degree, and generate the reduction for making the antecedent goal operating quantity
In the antecedent goal operating quantity signal that defined period is inhibited.According to this structure, in the ammonia nitrogen concentration of raw water
In the case that variable quantity in unit time indicates the rising of ammonia nitrogen concentration of raw water, make behaviour corresponding with the variable quantity
After work amount becomes the antecedent goal operating quantity of aeration air quantity, even if the variation scale in the unit time of the ammonia nitrogen concentration of raw water
In the case where the reduction for showing the ammonia nitrogen concentration of raw water, also the reduction of antecedent goal operating quantity can be made to obtain in defined period
Inhibit.Therefore, it in the rising of ammonia nitrogen concentration, promptly executes and is followed by ammoniacal nitrogen in the active sludge intermixture of aerobic slot
The increase control of the aeration air quantity of the rising of concentration in the reduction of ammonia nitrogen concentration, inhibits due to feedforward control at the same time
Cause the variation of superfluous aeration air quantity, so as to reliably carry out the Air Exposure in aerobic slot and reliably reduction processing
Ammonia nitrogen concentration afterwards.
Be also possible to it is described as defined in during be formed to according to activated sludge in a series of biological reaction tank
The structure that the residence time of mixed liquor is set.Time needed for Air Exposure is with the work in a series of biological reaction tank
Property mud mixed liquid residence time and change, therefore according to the residence time of active sludge intermixture change inhibit aeration air quantity
Reduction during, so as to reliably carry out the Air Exposure in aerobic slot and reliably reduce that treated that ammoniacal nitrogen is dense
Degree.
It is also possible to the second operating quantity computing unit to be formed as such as flowering structure: calculates dense with the ammoniacal nitrogen of the raw water
The corresponding antecedent goal operating quantity of variable quantity in the unit time of degree, and generate at least one waveform reproduction, it is described extremely
A few waveform reproduction from indicating reference waveform that the antecedent goal operating quantity changes over time on time-axis direction one by one
During first unit as defined in being staggered, and the reference waveform and the waveform reproduction are selected according to the defined period
In at least two waveforms, the maximum value of antecedent goal operating quantity is selected in selected waveform, is generated with this described
Antecedent goal operating quantity signal.According to this structure, by replicating and being overlapped reference waveform, the reduction of antecedent goal operating quantity is realized
Be inhibited such processing during reducing inhibition.Therefore, this can be made to be treated as fairly simple calculation process.
Also, it is according to the present invention another kind form water treatment system aeration air quantity control method be have it is a series of
The aeration air quantity control method of the water treatment system of biological reaction tank, a series of biological reaction tank, which has, is equipped with aeration dress
The anaerobism groove of at least more than one or anaerobic groove of the aerobic slot set and the upstream side for being set to the aerobic slot, and based on living
Property sludge carry out water process, the aeration air quantity control method is included based on the aeration air quantity as the aerator
The object run amount of target value controls the Boiler pressure control process of the aeration air quantity of the aerator；With the generation object run
The object run amount calculation process of amount；The object run amount calculation process include measure the aerobic slot activated sludge it is mixed
Close the mixed liquor mensuration operation of the ammonia nitrogen concentration of liquid；Measurement flows into the ammoniacal nitrogen of the raw water of a series of biological reaction tank
The raw water mensuration operation of concentration；Between the ammonia nitrogen concentration of active sludge intermixture based on the aerobic slot and its setting value
The feedback signal generation process of deviation generation feedback target operating quantity signal；When according to the unit of the ammonia nitrogen concentration of the raw water
Interior variable quantity generates the go-ahead signal generation process of antecedent goal operating quantity signal；Believe with by the feedback target operating quantity
Number and the antecedent goal operating quantity signal carry out add operation and generate the operating quantity generation process of the object run amount.
According to the above method, the ammonia nitrogen concentration of the active sludge intermixture based on aerobic slot executes feedback control, and holds
Row feedforward control corresponding with the variable quantity in the unit time of raw water ammonia nitrogen concentration.It, can be from raw water ammonia by means of this
Having started of state nitrogen concentration variation changes aeration air quantity matchedly, therefore even with being difficult to chase after by feedback control
With ammonia nitrogen concentration change dramatically, can also control as aeration air quantity appropriate.Also, the value of the ammonia nitrogen concentration in raw water
In lesser situation of higher but in the unit time variable quantity itself, the aeration air quantity carried out by feedforward control can reduce
Variation.In this case, it only just can sufficiently be coped with by feedback control, therefore inhibit the mistake because of caused by feedforward control
The variation of surplus aeration air quantity may be controlled to aeration air quantity appropriate and seek the saving of electric power.
It is also possible to the go-ahead signal generation process to calculate and in the unit time of the ammonia nitrogen concentration of the raw water
The corresponding antecedent goal operating quantity of variable quantity, and generating obtains the reduction of the antecedent goal operating quantity in defined period
The antecedent goal operating quantity signal inhibited.Variation according to this method, within the unit time of the ammonia nitrogen concentration of raw water
In the case that amount indicates the rising of the ammonia nitrogen concentration of raw water, operating quantity corresponding with the variable quantity is made to become aeration air quantity
Antecedent goal operating quantity after, even if variable quantity in the unit time of the ammonia nitrogen concentration of raw water indicates that the ammoniacal nitrogen of raw water is dense
In the case where the reduction of degree, also the reduction of antecedent goal operating quantity can be made to be inhibited in defined period.Therefore, in ammonia state
When the rising of nitrogen concentration, the aeration for being followed by the rising of ammonia nitrogen concentration in the active sludge intermixture of aerobic slot is promptly executed
The increase of air quantity controls, and at the same time, in the reduction of ammonia nitrogen concentration, inhibits to cause superfluous aeration wind because of feedforward control
The variation of amount, so as to reliably carry out the Air Exposure in aerobic slot and reliably reduce treated ammonia nitrogen concentration.
Invention effect:
In accordance with the invention it is possible to suitably control the air capacity supplied to the mixed liquor of aerobic slot.
Detailed description of the invention
Fig. 1 is the schematic structural diagram for showing a kind of recycled water manufacture system of implementation form according to the present invention；
Fig. 2 is the block diagram for showing the control structure of recycled water manufacture system；
Fig. 3 is the block diagram for showing the signal transmitting in aeration Wind Coverage Calculation portion；
Fig. 4 is the chart for showing the feature of FF operation flow function；
Fig. 5 is the chart changed over time for illustrating the ammonia nitrogen concentration of raw water and the leading mesh generated based on the chart
The chart of the FF operating quantity contained in mark operating quantity signal changed over time；
Fig. 6 is the ammonia nitrogen concentration and aeration wind of each slot in the recycled water manufacture system shown using this implementation form
Measure the chart changed over time；
Symbol description:
1 recycled water manufacture system (water treatment system)；
5 aerobic slots；
9 aerators；
10 biological reaction tanks；
31 raw waters survey ammonia meter (second surveys ammonia meter)；
32 aerobic slots survey ammonia meter (first surveys ammonia meter)；
40 control devices；
41 aeration Wind Coverage Calculation portions (aeration Wind Coverage Calculation device)；
48 feedforward control systems；
49 feedback control systems；
72 FB operating quantity computing units (the first operating quantity computing unit)；
73 differential calculation units (the second operating quantity computing unit)；
74 FF operating quantity function units (the second operating quantity computing unit)；
75 period setup units (the second operating quantity computing unit)；
76 feedforward gain units (the second operating quantity computing unit)；
91 aeration Boiler pressure control portions (aeration air quantity controller).
Specific embodiment
[obtaining a kind of fact of form according to the present invention]
The present inventor etc. for existing structure (structure of patent document 2) i.e., in addition to based on the work in aerobic slot
Property mud mixed liquid ammonia nitrogen concentration control aeration air quantity feedback control other than, also carry out based on flowing into a series of biology
Raw water in reactive tank ammonia nitrogen concentration control aeration air quantity feedforward control structure in, exist can not suitably control to
The case where air capacity of the mixed liquor supply of aerobic slot, have studied its reason.As a result, in the discovery such as the present inventor
State in existing structure there is a problem of it is as described below.
Firstly, controlling aeration air quantity according to ammonia nitrogen concentration value of raw water itself in existing structure.In the ammonia state of raw water
When nitrogen concentration rises very fast, it may occur that the delay of response in biological reaction tank, therefore the operating quantity of aeration air quantity will be set as
It is larger, even if to can also the ammonia nitrogen concentration for handling water be inhibited below limit value in this case.However, in original
When the rising of the ammonia nitrogen concentration of water is slow, the delay of response in biological reaction tank will not occur, therefore be set as larger in this way
Operating quantity will lead to the ammonia nitrogen concentration of even identical raw water and also become superfluous aeration air quantity.
Therefore, the present inventor etc. contemplate after passing through deep research and are on the one hand based in feedback control
The value of ammonia nitrogen concentration of active sludge intermixture itself in oxygen slot controls aeration air quantity, on the other hand controls in feedforward
In system, according to the variable quantity in the unit time of the ammonia nitrogen concentration for the raw water for flowing into a series of biological reaction tank to aeration wind
Amount is controlled, to make the beginning for being aerated the variation that air quantity follows the ammonia nitrogen concentration that requirement rapidly responds, and can be pressed down
Make the variation of the aeration air quantity superfluous when the variation of ammonia nitrogen concentration is slow.
In addition, there are the following problems in above-mentioned existing structure for the discovery such as the present inventor: in a series of biology
When the residence time of active sludge intermixture in reactive tank is longer, the time needed for Air Exposure is longer, therefore can generate nothing
Method sufficiently obtains the problem of feedforward control effect.
Therefore, the present inventor etc., which contemplates to be changed according to the residence time of active sludge intermixture, inhibits aeration wind
During the reduction of amount, the Air Exposure in aerobic slot is carried out reliably with this so as to the ammonia state that reliably reduces that treated
Nitrogen concentration.
[implementation form]
Implement form of the invention hereinafter, being explained in detail with reference to the accompanying drawings.In addition, it is following in all the appended drawings for identical or
Comparable element is using identical reference symbol and omits its repeated explanation.
Fig. 1 is the schematic structural diagram for showing a kind of recycled water manufacture system of implementation form according to the present invention.The figure institute
The recycled water manufacture system 1 shown is the water treatment system using conventional actived sludge purification sewage.Recycled water manufacture system 1 from
Upstream side successively has: raw water slot 2；The a series of biological reaction tank being made of anaerobism groove 3, anaerobic groove 4 and aerobic slot 5
10；With precipitation tank 6.
Raw water slot 2 plays the function of the dashpot for the sewage that interim storage flows into.The outflow side of raw water slot 2 passes through piping 52
It is connect with the inflow side for the anaerobism groove 3 for being located at most upstream side in a series of biological reaction tank 10.Piping 52 in be provided with by
It is stored in the supply pump 51 of the raw water force feed in raw water slot 2 to anaerobism groove 3.The outflow side of raw water slot 2 is provided with raw water and surveys ammonia
Count 31(second and survey ammonia meter), which surveys ammonia meter 31 and flows into a series of biological reaction tank 10(at this for measuring from raw water slot 2
In be most upstream side anaerobism groove 3) in raw water ammonia nitrogen concentration (hereinafter referred to as " raw water NH4Concentration ").
Biological reaction tank 10 is disposed with anaerobism groove 3, anaerobic groove 4 and aerobic slot 5 from upstream side, flows into biological respinse
The raw water of slot 10 exists together with activated sludge in the form of active sludge intermixture (hereinafter referred to as " mixed liquor ").In this reality
Apply in form, anaerobism groove 3 and anaerobic groove 4 are that a reactive tank is separated into two and is formed, across separator anaerobism groove 3 with
Anaerobic groove 4 is connected to.Therefore, the mixed liquor of anaerobism groove 3 can be mobile to anaerobic groove 4.The outflow side of anaerobic groove 4 by piping 53 with
The inflow side of aerobic slot 5 connects.In addition, the outflow side of aerobic slot 5 is connect by piping 54 with the inflow side of precipitation tank 6.
The aerator 9 for being aerated (aeration) to mixed liquor is provided in aerobic slot 5.According to this implementation
The aerator 9 of form is air-leakaging type, and is formed as that the compressed air being sent by pressure fan (diagram is omitted) is made to become fine
Steam bubble shape is simultaneously blown into the structure in mixed liquor from the bottom of aerobic slot 5.When the air in the mixed liquor for being blown into aerobic slot 5 becomes
When at steam bubble and rising to the water surface, realizes the stirring and mixing of mixed liquor, be fed through activity into mixed liquor at the same time
The oxygen that sludge microbe goes to denitrogenate, phosphorus and when organic matter are required.By the supply of aerator 9 into the mixed liquor of aerobic slot 5
Air capacity (hereinafter referred to as " aeration air quantity ") is controlled by following control devices 40.
Also, being provided with the ammonia nitrogen concentration (hereinafter referred to as " aerobic slot of mixed liquor in measurement aerobic slot 5 in aerobic slot 5
NH4Concentration ") aerobic slot survey ammonia meter 32(first survey ammonia meter).In addition, the mixed liquor that will be flowed out from measurement from aerobic slot 5
From the perspective of ingredient, preferably aerobic slot surveys the outflow side that ammonia meter 32 is all set in aerobic slot 5, but because of aerobic slot 5
Interior mixed liquor is considered as being thoroughly mixed, therefore their configuration is not particularly limited.
In precipitation tank 6, treatment fluid and sludge are separated into after the sludge settling in the treatment fluid that aerobic slot 5 flows into.It is dirty
Mud is back to anaerobism groove 3 by having the sludge reflux of sludge reflux pump 64 piping 63.
Then, illustrate the control structure of recycled water manufacture system 1.Fig. 2 is the control structure for showing recycled water manufacture system
Block diagram.In the figure, it is especially shown specifically the control of aerator 9, and omits rest part.
As shown in Fig. 2, control device 40 mainly includes the operation control for executing the whole control of recycled water manufacture system 1
Portion 42 processed；Generate the aeration Wind Coverage Calculation of the object run amount (that is, target value of the aeration air quantity of aerobic slot 5) of aerator 9
Portion 41；The function parts such as the aeration Boiler pressure control portion 91 based on object run amount control aerator 9.In addition, in this implementation form
In, aeration Boiler pressure control portion 91 is provided to control device 40, but can also be provided to aerator 9.Control device 40 is by one
A or multiple computers are constituted, and each computer has CPU(central processing unit), erasable store program performed by CPU
Or the main storage means of data used in program etc., the temporarily secondary storage device of storing data, use when CPU executes program
In the interface of connection CPU and external equipment；And inner track for being attached them etc. (not shown).Moreover, in CPU
Middle execution regulated procedure realizes each function part of control device 40 shown in Fig. 2 with this.
Each pump that control device 40 and recycled water manufacture system 1 have, i.e. supply pump 51 and sludge reflux pump 64
Driving portion is connected in the form of wired or wireless, and respectively the movement of pump 51,64 is controlled by the operation control unit 42 of control device 40.
Also, control device 40 is connected in the form of wired or wireless with the pressure fan (diagram is omitted) for changing aeration air quantity in aerator 9
It connects, the movement of aerator 9 is controlled by the aeration Boiler pressure control portion 91 of control device 40.In addition, control device 40 and each survey ammonia
Meter 31,32 is communicatively coupled, these measurement signals for surveying ammonia meter 31,32 are sent to control device 40.Then, control device 40
By each pump 51,64 of measurement signal operation and aerator 9 for surveying based on ammonia 31,32.By means of this, control device 40 is by raw water
Influx, processing the discharge amount of water, the discharge rate and aeration of the flow of circulation fluid, the flow of returned sludge, excess sludge
Air quantity management and control are value appropriate, so that the nitrogen, phosphorus and the organic matter that handle water in filtering trough 7 are no more than respective limit
Value processed.
In the recycled water manufacturing process carried out according to the recycled water manufacture system 1 of above structure, as described below execute is mixed
Close the removal of organic matter, nitrogen and phosphorus contained in liquid (raw water) etc..
In recycled water manufacturing process, aerobic of the carbons organic matter contained in mixed liquor in activated sludge and simultaneous
It is decomposed under the action of the heterotrophicy bacteria of property or is expelled to exterior as activated sludge.Specifically, in mixed liquor
Organic matter contacts with activated sludge and adsorbs (flocculation) on the surface of activated sludge, by the organic matter of activated sludge absorption in anaerobism
Under slot 3 and the anaerobic condition of anaerobic groove 4, is taken in by the facultative heterotrophicy bacteria in activated sludge and be decomposed.Also, aerobic
Under the aerobic condition of slot 5, organism is maintained and cell in order to obtain for aerobic and facultative heterotrophicy bacteria in activated sludge
Synthesis etc. needed for energy and decompose (oxidation) by the organic matter of activated sludge absorption.In addition, the heterotrophicy bacteria, which utilizes, passes through oxygen
Change obtained energy, is new cellular material by organic synthesis (assimilation).In this way, the major part contained in mixed liquor
Organic matter is used in the oxidation and assimilation of active sludge microorganism after activated sludge absorption, and is gone from mixed liquor
It removes.In addition, it is not oxidized and assimilation organic matter be held in system, and with fail by the endogenous of active sludge microorganism
The cellular material of breathing oxidation is expelled to exterior eventually as excess sludge together.
Also, in recycled water manufacturing process, under the action of poly- phosphobacteria of the phosphorus contained in mixed liquor in activated sludge
Exterior is expelled to accumulate the state in activated sludge.Specifically, the poly- phosphobacteria in activated sludge is in anaerobism groove 3
Anaerobic condition under, the organic matters such as acetic acid for containing in the raw water that anaerobism groove 3 is flowed into from raw water slot 2 are taken in internal, and released
Release kept phosphate radical (PO4).Then, the superfluous intake under the aerobic condition of aerobic slot 5 of the polyP bacteria in activated sludge
Phosphorus, and take in the phosphorus of the above phosphoric acid state released in anaerobism groove 3.In this way, which the phosphorus in mixed liquor is accumulated in activity
In sludge, the activated sludge for having accumulated phosphorus is expelled to exterior as excess sludge.
Also, nitrogen is emitted into exterior from anaerobic groove 4 in recycled water manufacturing process.Specifically, it is flowed from raw water slot 2
Enter and contains ammoniacal nitrogen (NH in the raw water of anaerobism groove 34 +- N) and organic nitrogen.The organic nitrogen contained in mixed liquor passes through anaerobism groove
3, anaerobic groove 4 and aerobic slot 5 become ammoniacal nitrogen.Ammoniacal nitrogen in mixed liquor passes through the effect of nitrobacteria in aerobic slot 5
It aoxidizes and becomes nitrite nitrogen (NO2- N) or nitric nitrogen (NO3- N).Therefore, it is fed through by circulating pump 62 from precipitation tank 6
Contain nitrite nitrogen and/or nitric nitrogen in recirculated water in anaerobic groove 4.Nitrite nitrogen and nitric acid state in mixed liquor
Nitrogen is breathed under the oxygen free condition of anaerobic groove 4 by the nitric acid of the denitrifying bacteria using the organic matter in raw water as nutrient source
Or the breathing of nitrous acidity is reduced to nitrogen (N2), and exterior is emitted into from anaerobic groove 4.
Herein, illustrate the aerator 9 calculated by the aeration Wind Coverage Calculation portion 41 of control device 40 referring to Fig. 3
The generation method of the target value of the aeration air quantity of object run amount, i.e. aerobic slot 5.Based on aeration Wind Coverage Calculation portion 41 in generate
Object run amount, aeration Boiler pressure control portion 91 adjusts the rotation speed for the pressure fan (diagram omit) that aerator 9 has
Operating quantity and be set to from the adjusting actuator on the feed path for the air that aerator 9 is supplied into aerobic slot 5
At least one party in the operating quantity of (diagram is omitted).
Fig. 3 is the block diagram for showing the signal transmitting in aeration Wind Coverage Calculation portion.As shown in the drawing, aeration Wind Coverage Calculation portion 41 has
It is standby: to be based on raw water NH4Variable quantity in the unit time of concentration generates (hereinafter referred to as " the FF operation of antecedent goal operating quantity
Amount "), and as the feedforward control system (hereinafter referred to as FF control system 48) of antecedent goal operating quantity signal output；
With with aerobic slot NH4Concentration is as control amount and generates feedback target operating quantity (hereinafter referred to as " FB operating quantity "), and will
Its feedback control system (hereinafter referred to as FB control system 49) as the output of feedback target operating quantity signal.FF control system 48
It cooperates and functions with 49 phase of FB control system, by the FF operating quantity generated in FF control system 48 and in FB control system
The FB operating quantity generated in 49 carries out add operation by add operation unit 70, to generate the object run of aerator 9
Amount.
Firstly, illustrating FB control system 49.FB control system 49 has: calculating the mixed liquor of preset aerobic slot 5
Ammonia nitrogen concentration setting value (hereinafter referred to as " aerobic slot NH4Concentration set point ") with by aerobic slot survey ammonia meter 32 measure it is aerobic
Slot NH4The deviation computing unit 71 of deviation between concentration；It is calculated with the FB operating quantity for generating FB operating quantity according to the deviation single
First (the first operating quantity computing unit) 72.FB operating quantity computing unit 72 be for example using PID control method, P control method or
The computing unit of PI control method calculating FB operating quantity.The output signal (FB operating quantity) of FB control system 49 is input to addition
Arithmetic element 70.
Aerobic slot NH4Concentration set point is ammonia nitrogen concentration (the processing water NH based on processing water4Concentration) limits value (target
Value) value that suitably sets.However, aerobic slot NH4Concentration set point is in addition to based on processing water NH4Other than the limits value of concentration, may be used also
It is set with other factors such as water temperatures based on mixed liquor.
Then, illustrate FF control system 48.FF control system 48 includes differential calculation unit 73, FF operating quantity function unit
74, period setup unit 75 and feedforward gain unit 76, and have the second operating quantity computing unit for generating FF operating quantity.
The output signal (FF operating quantity) of FF control system 48 is input in add operation unit 70.In this embodiment, FF is controlled
The structure of setup unit 75 during system 48 is formed as executing after FF operating quantity function unit 74 is performed as shown in Figure 3, but
It is the structure that can also be formed as executing FF operating quantity function unit 74 after period setup unit 75.
Differential calculation unit 73 surveys the raw water NH that ammonia meter 31 measures to by raw water4Concentration x carries out differential calculation, is calculated with this
Raw water NH4Variation delta x in the unit time of concentration.FF operates flow function F1(Δ x) is to be based on raw water NH4Concentration
Variation delta x in unit time and ammonia nitrogen concentration (the processing water NH for controlling processing water4Concentration), by raw water NH4The list of concentration
The static characteristic relationship between variation delta x and aeration air quantity operating quantity (especially FF operating quantity) in the time of position carries out function
Obtained from change.In addition, raw water NH4Concentration x is that the raw water being set in raw water slot 2 surveys the survey of ammonia meter 31 in this embodiment
Definite value, as long as but flow into the ammonia nitrogen concentration of the raw water of anaerobism groove 3, therefore it locates and does not limit.
Fig. 4 is to show FF operation flow function F1 (chart of the characteristic of Δ x), longitudinal axis y expression FF operating quantity (L/min), cross
Axis Δ x indicates raw water NH4Variable quantity (mg/L) in the unit time of concentration.In Fig. 4, raw water NH4In the case that concentration increases
Variation delta x is positive value.FF operating quantity (L/min) indicates the aeration air quantity of aerobic slot 5.The minimum air quantity Y of FF operating quantity y1
It is minimum demand air quantity needed for maintaining whole system.In order to which minimum demand air quantity needed for maintaining whole system refers to,
It provides different for stirring the mixed liquor of aerobic slot 5 and being proliferated using carbons organic matter under the aerobic condition of aerobic slot 5
Oxygen, minimum needed for health object, the nitrobacteria isoreactivity sludge microbe nitrified to ammoniacal nitrogen maintain organism
Aeration air quantity.Minimum air quantity Y1It can be carried out according to the quantity of the active sludge microorganism of aerobic slot 5 or capacity of aerobic slot 5 etc.
It suitably sets.
In raw water NH4Variation delta x in the unit time of concentration is from negative value (concentration reduction state) to defined first
Variation delta X1In the range of, FF operating quantity y is with minimum air quantity Y1It keeps constant.In the first variation delta X1In above range,
FF operating quantity y increases with the increase of variation delta x.First variation delta X1It can be positive value, be also possible to 0, Huo Zheke
To be negative value.For example, as indicated with broken lines in fig. 4, it can also be in the Δ X as negative value1' it is set as minimum wind in region below
Measure Y2。
In raw water NH4It in the case that concentration is reduced, can only be coped with enough by feedback control, therefore FF operating quantity y is set
For the minimum air quantity Y as steady state value1.It is set like this, so that FF operates flow function F1(Δ x) unit 74 be formed as
Flowering structure: it generates antecedent goal operating quantity (following reference waveforms), ammonia nitrogen concentration of the antecedent goal operating quantity in raw water
Unit time in variation delta x indicate raw water ammonia nitrogen concentration x rising when make be aerated air quantity y increase, in raw water
Variation delta x in the unit time of ammonia nitrogen concentration indicates not changing aeration air quantity when the reduction of the ammonia nitrogen concentration x of raw water
y。
According to this structure, in the rising of ammonia nitrogen concentration, it is followed by ammoniacal nitrogen in the active sludge intermixture of aerobic slot
The rising of concentration and promptly execute aeration air quantity increase control, at the same time in the reduction of ammonia nitrogen concentration, inhibit because
Feedforward control and the variation for causing superfluous aeration air quantity, so as to reliably execute the Air Exposure in aerobic slot and reliable
Reduce treated ammonia nitrogen concentration in ground.
In addition, in the first variation delta X1When for positive value (when being not zero), it can prevent because of raw water NH4Concentration it is small
Change and FF operating quantity y is caused continually to change.
Period setup unit 75 is set and operates flow function F by FF in order to above-mentioned FF operating quantity y additional dynamic characteristic1
(during the effect for the FF operating quantity y that Δ x) is obtained plays.Effect play during include dead time (also referred to as transformation period) with
And it reduces during inhibition (also referred to as retention time).
In principle, dead time, which refers to, surveys a series of biology of raw water inflow that ammonia meter 31 measures ammonia nitrogen concentration by raw water
Reactive tank 10 mixes the required time until becoming mixed liquor and flowing into aerobic slot 5 with activated sludge.However, aerobic
The growth rate that the nitrobacteria of ammoniacal nitrogen is nitrified in slot 5 is slower than the heterotrophicy bacteria in common activated sludge, therefore is mixing
The discontinuity surface of the ammonia nitrogen concentration of liquid increases aeration air quantity before reaching aerobic slot 5, reach aerobic slot 5 in the discontinuity surface
When, preferably activate active sludge microorganism, to cope with sharply increasing for ammonia nitrogen concentration.Namely it is preferred that
Dead time setting are as follows: measure the raw water of ammonia nitrogen concentration until when flowing into required for aerobic slot 5 than surveying ammonia meter 31 as raw water
Between short time.
In addition, referring to the ammoniacal nitrogen in the mixed liquor of inflow aerobic slot 5 during reducing inhibition until being aoxidized by aerator 9
Time, i.e. residence time of the active sludge intermixture in a series of biological reaction tank 10.It in other words, will be in raw water
Ammonia nitrogen concentration begins to ramp up the time that ammoniacal nitrogen in the mixed liquor in rear a series of biological reaction tank 10 is no more than target value
During being set as reducing inhibition.The time as needed for Air Exposure is with the activated sludge in a series of biological reaction tank 10
The residence time of mixed liquor and change, therefore according to the residence time of active sludge intermixture change inhibit aeration air quantity reduction
During, so as to reliably carry out the Air Exposure in aerobic slot 5 and reliably reduce treated ammonia nitrogen concentration.
Therefore, when setup unit 75 calculates the unit with the ammonia nitrogen concentration of raw water during the second operating quantity computing unit
The interior corresponding FF operating quantity of variation delta x, and generating makes the reduction of the FF operating quantity (reduce suppression in defined period
During system) the antecedent goal operating quantity signal that is inhibited.More specifically, the second operating quantity computing unit calculates and raw water
The corresponding FF operating quantity of variation delta x in the unit time of ammonia nitrogen concentration, and generate indicate the FF operating quantity with
The reference waveform of time change.In addition, the second operating quantity computing unit is generated from reference waveform generated in time shaft side
At least one waveform reproduction during first unit as defined in being staggered one by one upwards.Reference waveform and at least one waveform reproduction
It is overlapped with occurring during the first unit.Second operating quantity computing unit is selected according to dead time and during reducing inhibition
Select at least one waveform in reference waveform and waveform reproduction.When the waveform selected is multiple, the second operating quantity calculates single
Member selects the maximum value of FF operating quantity in the interior multiple waveforms selected per unit time, generates antecedent goal operating quantity with this
Signal.That is, occurring at overlapped position in selected multiple waveforms, the maximum value of FF operating quantity is selected.Selected
The waveform selected be one when, the second operating quantity computing unit will with the waveform selected antecedent goal operating quantity as
Antecedent goal operating quantity signal is exported.
Fig. 5 is to illustrate the chart of the ammonia nitrogen concentration of raw water changed over time and illustrate to be included in based on the chart
The chart of FF operating quantity in the antecedent goal operating quantity signal of generation changed over time.The upper graph of Fig. 5 is to illustrate original
The chart of the ammonia nitrogen concentration of water changed over time, the lower diagrams of Fig. 5 be illustrate be contained in opposite raw water ammoniacal nitrogen it is dense
Spend the chart of the FF operating quantity in antecedent goal operating quantity signal generated changed over time.
As shown in the upper graph of Fig. 5, in the case where monotone decreasing after the ammonia nitrogen concentration of raw water is increased monotonically, in original
During the ammonia nitrogen concentration monotone increasing adduction of water is until reach peak value, the variable quantity in the unit time of the ammonia nitrogen concentration of raw water
Δ x monotone increasing adduction welcomes peak value, and by the peak value during the ammonia nitrogen concentration of raw water reaches peak value, the ammonia state of raw water
Variation delta x monotone decreasing in the unit time of nitrogen concentration.
Variation delta x in the chart of Fig. 5, during the ammonia nitrogen concentration monotone decreasing of raw water, in the unit time
Become 0.For example, the first variable quantity is set as Δ X1=0, it is Δ X in variable quantity1Region below is set as minimum air quantity Y1(>=
0).
The waveform of variation delta x in such unit time changed over time is shown as the waveform indicated by 0h
(reference waveform).In addition, in Fig. 5,0h, 1h ... it waits labels to correspond to and welcomes the waveform of peak value in the marked locations.
Second operating quantity computing unit calculates defined first list that is staggered one by one on time-axis direction from the waveform of 0h
Waveform during position.In this example, 1 hour (1h) is set as during the first unit.What the second operating quantity computing unit calculated
The waveform of FF operating quantity is to make the waveform of 0h is every to move in parallel on time-axis direction as shown in the lower diagrams of Fig. 5 every other hour
Obtained from waveform (waveform of 1h, 2h, 3h, 4h: waveform reproduction).Moreover, according to set dead time A and reducing suppression
B selects calculated at least one of 0h to 4h waveform during system.For example, in the case where not set dead time A, at least
Select the waveform of 0h.During B is only the first unit during reducing inhibition in the case where (1 hour), only selected according to dead time A
Select any one waveform.For example, only being selected when during B being only the first unit during dead time A is 2 hours and reduces inhibition
Select the waveform of 2h.In addition, the setting of B can also set input by operator during dead time A and reduction inhibition.It takes and generation
It, can also be formed as B during control device 40 sets dead time A automatically and reduce inhibition according to season or period
Structure.
Also, selecting FF in per unit time in selected multiple waveforms for example in the case where multiple waveforms are selected
The maximum value of operating quantity.Such as in the example of the lower diagrams of Fig. 5, it is chosen in the state that waveform from 1h to 3h is overlapped
It selects.This means that dead time A is set as 1 hour, reduces B during inhibiting and be set as 3 hours.It is selected in the waveform from 1h to 3h
The maximum value of FF operating quantity in per unit time is selected, the FF operating quantity being contained in antecedent goal operating quantity signal is generated with this.
That is, FF operating quantity generated has the crest line with retinue 1h to 3h waveform as used represented by solid line in the lower diagrams of Fig. 5
Waveform.Changing over time for the FF operating quantity set in this way is exported as antecedent goal operating quantity signal.In addition,
In the lower diagrams of Fig. 5, by dead time A and during reducing inhibition, B is marked on the basis of at the peak value of each waveform, but
As long as being that will be used as benchmark by corresponding point each other in each waveform, so that it may on the basis of any one point.
According to this structure, the variation delta x within the unit time of the ammonia nitrogen concentration of raw water indicates the ammoniacal nitrogen of raw water
In the case where the rising of concentration, after the object run amount for making FF operating quantity corresponding with the variable quantity become aeration air quantity,
In the case that even if the variable quantity in the unit time of the ammonia nitrogen concentration of raw water indicates the reduction of ammonia nitrogen concentration of raw water,
The reduction of FF operating quantity can be made to be inhibited in defined period.Therefore, ammonia nitrogen concentration rise when, promptly execute with
With the increase control of the aeration air quantity of the rising of ammonia nitrogen concentration in aerobic slot active sludge intermixture, at the same time, in ammonia
When state nitrogen concentration is reduced, inhibit the variation for causing superfluous aeration air quantity because of feedforward control, so as to reliably carry out
Air Exposure in oxygen slot and the ammonia nitrogen concentration that reliably reduces that treated.In addition, for inhibiting in B during reducing inhibition
The processing of the reduction of FF operating quantity can lay equal stress on complex reference wave shape by duplication to realize.Therefore, the processing can be made to become to compare
Better simply calculation process.
In addition, in the record of this specification and claims, " the reduction of antecedent goal operating quantity (FF operating quantity)
Be inhibited " etc. terms refer to reference waveform (0h wave in FF operating quantity corresponding with the variation delta x in the unit time
Shape) in, contain at least partially compared to FF operating quantity reduce during the FF operating quantity value, FF operating quantity it is big when
Between section.
Dead time A and reduce inhibit during B include raw water since flowing into anaerobism groove 3 from anaerobic groove 4 flow out up to
The residence time of aeration is realized in aerobic slot 5, can be found out by testing or calculating.
Also, feedforward gain unit 76 also plays the function of the unit as the dynamic characteristic for assigning FF operating quantity y.Feedforward increases
Beneficial KfBe the FF operating quantity y as output valve amplitude of variation with as the raw water NH of input value4Change in the unit time of concentration
The ratio of the amplitude of variation of change amount Δ x, is suitably set.
In this embodiment, shown in the curve that finally obtained FF operating quantity y such as the solid line below Fig. 5 indicates, with not
Value is that the form of negative value is set.For this purpose, the first variable quantity can also be set as Δ X as described above1=0, and be set as
It is Δ X in variable quantity1Region below makes minimum air quantity Y1(> 0).It replaces, can also replicate and be overlapped FF operation
(curve that the solid line below Fig. 5 indicates is generated when the reference waveform of amount generates the value of FF operating quantity changed over time with this
When), using FF operating quantity, value as the form of negative value (do not become minimum air quantity or less) does not carry out calculation process.By means of this, i.e.,
Just in the first variation delta X1It is negative value that FF operating quantity value is also possible to prevent in the case where for negative value.
As described above, being based on raw water NH by FF control system 484Variation delta x in the unit time of concentration is calculated
FF operating quantity is based on aerobic slot NH by FB control system 494Concentration calculates FB operating quantity, these FF operating quantity and FB are grasped
The object run amount of aerator 9 is summed and generated to work amount.
Fig. 6 is the ammonia nitrogen concentration and aeration wind of each slot in the recycled water manufacture system shown using this implementation form
The chart of amount changed over time.It is shown in FIG. 6: raw water NH being shown using horizontal axis as common time shaft4Concentration, aerobic slot
NH4Concentration, the processing water filtered through precipitation tank 6 ammonia nitrogen concentration (Fig. 6 and hereinafter, be recorded as processing water NH4Concentration),
Handle water NH4The limits value (in Fig. 6 and hereinafter, being recorded as processing water limits value) and aeration air quantity of concentration become at any time
The chart of change.In addition, processing water NH4Concentration is for example reserving at the ammonia nitrogen concentration of the processing water in filtering trough 7 by measurement
Ammonia meter (not shown) is surveyed to be measured.
In this embodiment, as described above, being based on aerobic slot NH4Concentration carries out feedback control, and executes and raw water NH4
The corresponding feedforward control of variation delta x in the unit time of concentration.It, can be from raw water NH by means of this4Concentration variation
Start to change aeration air quantity matchedly.In the example of fig. 6, it is set with dead time A, and in moment t1 raw water
NH4Concentration rise when from after dead time A soon at the time of t2 when, occur by feedforward control carries out be aerated air quantity increasing
Greatly.Therefore, even with the change dramatically for the ammonia nitrogen concentration for being difficult to follow by feedback control, it is appropriate for capable of also controlling
Aeration air quantity.
In addition, setting is reduced B during inhibition in the example of fig. 6, even if raw water NH occurs4The reduction of concentration, also can
Enough make the increase of the aeration air quantity carried out by feedforward control (even if subtracting dead time A) than raw water NH4The increase of concentration
It is maintained during period (during to reach to peak value) is long.
As a result, during later between C(moment t3 and moment t4 during) be also able to suppress aerobic slot NH4It is dense
The increase of degree handles water NH4Concentration is also controlled at the value for being no more than processing water limits value.
Also, as during between period D(moment t4 and moment t5) shown in, value of ammonia nitrogen concentration of raw water itself compared with
In the lesser situation of variable quantity in the high but unit time, the variation of the aeration air quantity carried out by feedforward control can reduce.
As shown in fig. 6, in period D, raw water NH4Concentration slowly rises, therefore aeration air quantity will not steeply rise.That is, in period D
The variation of aeration air quantity can be dominated by feedback control.Like this, during only passing through feedback control just can sufficiently cope with,
By inhibiting the variation of aeration air quantity superfluous because of caused by feedforward control, it may be controlled to aeration air quantity appropriate and seek
The saving of electric power.
It this concludes the description of implementation form of the invention, but the present invention is not limited to above-mentioned implementation forms, are not departing from its master
Various improvement, change, amendment can be carried out in the range of purport.
For example, the specific structure of recycled water manufacture system 1 is not limited to above-mentioned implementation form.According to the regeneration of this implementation form
Water manufacture system 1 is illustrated in the structure that aerobic slot 5 has precipitation tank 6 later, but above-mentioned implementation form also can be applied to:
Have the UF membrane slot of separated sludge etc. from the mixed liquor flowed by aerobic slot 5 after aerobic slot 5 utilizes UF membrane activity
In the water treatment system of sludge (MBR:Membrane Bio-Reactor).Also, being manufactured according to the recycled water of this implementation form
System 1 is provided simultaneously with anaerobism groove 3 and anaerobic groove 4, but can also have at least one party in anaerobism groove 3 and anaerobic groove 4.In addition,
Be formed as the operating quantity tune of the operating quantity or adjusting actuator by the revolving speed of pressure fan according to the aerator 9 of this implementation form
The structure of section aeration air quantity, but the operation of the operating quantity and adjusting actuator by the revolving speed of pressure fan can also be formed as
Both amounts adjust the structure of aeration air quantity.
Also, for example, in this embodiment, surveying ammonia meter 31,32 is the ammonia for separately and continuously measuring raw water and mixed liquor
The densimeter of state nitrogen concentration, but be also possible to periodically or non-periodically sample and by arbitrary method as measurement ammoniacal nitrogen
The method of concentration.
Also, being used when the variation delta x within the unit time based on raw water ammonia nitrogen concentration generates antecedent goal operating quantity
In ensure to reduce inhibit during antecedent goal operating quantity in B the structure that inhibits of reduction be not limited to the described above make 0h waveform by
One is staggered the form being overlapped during the first unit.For example, it is also possible to be formed as the second operating quantity computing unit detection 0h waveform
Peak value (the perhaps reduction of the variation delta x in the unit time) and generate such as according to reduce inhibit during maintain or delay
Slowly the structure of antecedent goal operating quantity as the peak value is reduced.Also, can also for example be formed as such as flowering structure: the second operating quantity
Computing unit expands according to the form that during reducing inhibition, 0h waveform is unfolded on time-axis direction, is generated in advance with this
Object run amount.
Industrial applicability:
The present invention provide can suitably control to the mixed liquor of aerobic slot supply air capacity water treatment system with
And its it is useful when aeration air quantity control method.
Claims (6)
1. a kind of water treatment system, has:
Be equipped with aerator aerobic slot and be set to the aerobic slot upstream side the anaerobism groove of at least more than one or
Anaerobic groove, and a series of biological reaction tank based on activated sludge process progress water process；
Measure the ammonia nitrogen concentration of the active sludge intermixture of the aerobic slot first surveys ammonia meter；
Measurement flows into the second survey ammonia meter of the ammonia nitrogen concentration of the raw water of a series of biological reaction tank；
The object run amount of target value based on the aeration air quantity as the aerator controls the aeration of the aerator
The aeration air quantity controller of air quantity；With
Generate the aeration Wind Coverage Calculation device of the object run amount；
The aeration Wind Coverage Calculation device includes
Feedback control system, the feedback control system include the ammonia nitrogen concentration of the active sludge intermixture based on the aerobic slot
Deviation between its setting value generates the first operating quantity computing unit of feedback target operating quantity signal；
Feedforward control system, the feedforward control system include the variation in the unit time according to the ammonia nitrogen concentration of the raw water
Amount generates the second operating quantity computing unit of antecedent goal operating quantity signal；With
Add operation unit, the add operation unit is by the feedback target operating quantity signal and the antecedent goal operating quantity
Signal carries out add operation and generates the object run amount；
The second operating quantity computing unit is formed as the ammonia nitrogen concentration for the raw water for surveying the measurement of ammonia meter to described second
Value carries out differential calculation, calculates the structure of the variable quantity in the unit time of the ammonia nitrogen concentration of the raw water；
The antecedent goal operating quantity signal is following signal: the variation within the unit time of the ammonia nitrogen concentration of the raw water
Amount indicates to make the aeration air quantity increase when rising of the ammonia nitrogen concentration of the raw water, in the ammonia nitrogen concentration of the raw water
Variable quantity in unit time indicates not changing the aeration air quantity when reduction of the ammonia nitrogen concentration of the raw water.
2. water treatment system according to claim 1, which is characterized in that
The second operating quantity computing unit is formed as such as flowering structure:
Antecedent goal operating quantity corresponding with the variable quantity in the unit time of the ammonia nitrogen concentration of the raw water is calculated, and
Generate the antecedent goal operating quantity signal for making the reduction of the antecedent goal operating quantity be inhibited in defined period.
3. water treatment system according to claim 2, which is characterized in that
The delay according to active sludge intermixture in a series of biological reaction tank is formed to during as defined in described
The structure that time is set.
4. water treatment system according to claim 2 or 3, which is characterized in that
The second operating quantity computing unit is formed as such as flowering structure:
Antecedent goal operating quantity corresponding with the variable quantity in the unit time of the ammonia nitrogen concentration of the raw water is calculated, and
Generate at least one waveform reproduction, at least one described waveform reproduction is from the base for indicating that the antecedent goal operating quantity changes over time
Waveform is staggered one by one during defined first unit on time-axis direction, and selects institute according to the defined period
At least two waveforms in reference waveform and the waveform reproduction are stated, the antecedent goal is selected to grasp in selected waveform
The maximum value of work amount generates the antecedent goal operating quantity signal with this.
5. a kind of aeration air quantity control method of water treatment system,
It is the aeration air quantity control method for the water treatment system for having a series of biological reaction tank, a series of biology is anti-
Answer slot have be equipped with aerator aerobic slot and be set to the aerobic slot upstream side the anaerobism groove of at least more than one or
Anaerobic groove, and water process is carried out based on activated sludge process,
The aeration air quantity control method includes
The object run amount of target value based on the aeration air quantity as the aerator controls the aeration of the aerator
The Boiler pressure control process of air quantity；With
Generate the object run amount calculation process of the object run amount；
The object run amount calculation process includes
Measure the mixed liquor mensuration operation of the ammonia nitrogen concentration of the active sludge intermixture of the aerobic slot；
Measurement flows into the raw water mensuration operation of the ammonia nitrogen concentration of the raw water of a series of biological reaction tank；
Deviation between the ammonia nitrogen concentration of active sludge intermixture based on the aerobic slot and its setting value generates feedback mesh
Mark the feedback signal generation process of operating quantity signal；
The leading of antecedent goal operating quantity signal is generated according to the variable quantity in the unit time of the ammonia nitrogen concentration of the raw water
Signal generation process；With
The feedback target operating quantity signal and the antecedent goal operating quantity signal are subjected to add operation and generated described
The operating quantity generation process of object run amount；
The go-ahead signal generation process includes carrying out differential calculation to the value of the ammonia nitrogen concentration of the raw water of measurement, is calculated
The process of variable quantity in the unit time of the ammonia nitrogen concentration of the raw water；
The antecedent goal operating quantity signal is following signal: the variation within the unit time of the ammonia nitrogen concentration of the raw water
Amount indicates to make the aeration air quantity increase when rising of the ammonia nitrogen concentration of the raw water, in the ammonia nitrogen concentration of the raw water
Variable quantity in unit time indicates not changing the aeration air quantity when reduction of the ammonia nitrogen concentration of the raw water.
6. the aeration air quantity control method of water treatment system according to claim 5, which is characterized in that
The go-ahead signal generation process calculates corresponding with the variable quantity in the unit time of the ammonia nitrogen concentration of the raw water
Antecedent goal operating quantity, and generate so that the reduction of the antecedent goal operating quantity is inhibited in defined period the elder generation
Row object run amount signal.
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| JP7406445B2 (en) | 2020-04-28 | 2023-12-27 | 株式会社明電舎 | Air volume control device and air volume control method |
| CN113698029B (en) * | 2021-07-14 | 2022-07-22 | 河海大学 | Gate-controlled non-constant water level estuary water quality purification system and operation method thereof |
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| CN1778714A (en) * | 2005-10-20 | 2006-05-31 | 彭永臻 | Adjusting method for A/O biological denitrification reactor and nitrification process, its on-line fuzzy controller and control thereof |
| CN101880111A (en) * | 2010-06-25 | 2010-11-10 | 北京工业大学 | Real-time control device and method for deep denitrification and dephosphorization of A2/O-BAF (Biological Aerated Filter) process |
| CN201737811U (en) * | 2010-06-25 | 2011-02-09 | 北京工业大学 | A2/O-BAF technique deep denitrification and dephosphorization real-time control device |
| CN103443038A (en) * | 2010-09-27 | 2013-12-11 | 川崎重工业株式会社 | Water treatment system and method for controlling aeration air quantity thereof |
| 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 |
| CN103496818A (en) * | 2013-09-11 | 2014-01-08 | 北京工业大学 | AAO (Anaerobic-Anoxic-Oxic)-biological contact oxidation strengthened denitrification and dephosphorization device and real-time control method of low C/N sewage treatment |
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| CN105731630A (en) | 2016-07-06 |
| CN205398370U (en) | 2016-07-27 |
| WO2016103707A1 (en) | 2016-06-30 |
| JP2016120465A (en) | 2016-07-07 |
| JP6431363B2 (en) | 2018-11-28 |
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