CN101609309A - Membrane pollution optimized control specialist system of membrane reactor - Google Patents
Membrane pollution optimized control specialist system of membrane reactor Download PDFInfo
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- CN101609309A CN101609309A CNA200910012528XA CN200910012528A CN101609309A CN 101609309 A CN101609309 A CN 101609309A CN A200910012528X A CNA200910012528X A CN A200910012528XA CN 200910012528 A CN200910012528 A CN 200910012528A CN 101609309 A CN101609309 A CN 101609309A
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- pollution
- film
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- 239000012528 membrane Substances 0.000 title claims abstract description 52
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000005273 aeration Methods 0.000 claims description 7
- 238000011001 backwashing Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 238000002405 diagnostic procedure Methods 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003745 diagnosis Methods 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000013043 chemical agent Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 11
- 238000004065 wastewater treatment Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Activated Sludge Processes (AREA)
Abstract
Membrane pollution optimized control specialist system of membrane reactor belongs to the crossing domain of environment project and computer software technology.It is characterized in that be foundation to handle film pollution factor in the membrane bioreactor active sludge intermixture under the different operating modes of sanitary sewage to the weight and the direction of film pollution effect, set up membrane biological reactor process parameter regulation and control rule, make up membrane pollution optimized control specialist system of membrane reactor, prediction and expert diagnosis that realization worsens membrane pollution of membrane bioreactor, and finish the auto-control function, thereby realize that film pollutes effectively delaying of speed.System has self-learning capability, successfully regulates and control case and expands rule base by system's self study.Effect of the present invention and benefit are effectively membrane component and prolong life-span, minimizing consumption of chemical agent, reduce operating cost; Effective control that film pollutes can make membrane biological reactor process more be adapted to national conditions, promotes the development of water saving cause.
Description
Technical field
The invention belongs to the crossing domain of environment project and computer software technology, relate to membrane bioreactor and intelligence control system, specially refer to the film pollution optimization control method of expert system application in membrane bioreactor.
Background technology
Membrane bioreactor (membrane bioreactor MBR) is with the emerging technology of application of membrane in wastewater treatment, in membrane bioreactor, can realize simultaneously in the space of compactness that microorganism is to the degraded of polluter and film separating polluter, and the degraded with separate between exist synergy, compare with traditional waste water treatment process, it is good to have effluent quality, occupation area of equipment is little, the sludge concentration height, excess sludge production is low, be convenient to advantages such as robotization control, be considered to one of the most rising wastewater treatment and technology of middle water recycle.
Along with the raising of MBR technical merit and the continuous reduction of membrane material price, the MBR The Application of Technology is more and more wider, but in engineering was used, higher being still of operating cost hindered the bottleneck that MBR technology further develops.Film pollutes and causes the MBR high energy consumption, and determines the water production rate of MBR, the cleaning frequency and the replacing frequency of film, is considered to influence the major reason of MBR process economy.Therefore,, reduce technology operating cost and obtain operational effect steady in a long-term for MBR technology, must research film pollution mechanism and control method thereof.
Film pollution mechanism numerous and complicated in the integral type film biological reactor, its factor of influence are mainly from three aspects: the character of the character of film, operating conditions and active sludge intermixture.And the source of membrane contaminant matter is exactly an active sludge intermixture in the membrane bioreactor, and the character of mixed liquor is more complicated to the influence that film pollutes.It is home and abroad environment engineering area research focus that film pollution factor and film pollute Control Study, and the quantity of publishing an article significantly increases year by year, but result of study can't be used to control the actual motion of technology only for the minority scientific research personnel grasps.
The application of Based Intelligent Control in various non-stable dynamic project system increasingly extensive with deeply.Adopt automatic control technology, can adjust each equipment and parameters of technique process at any time, can make equipment state optimization, economical operation, energy efficient according to the result who detects; Improve working conditions, save manpower, improve the technology management level of waste water treatment process, therefore, the application prospect of intelligence control system in sewage disposal system is very wide.Expert system is a kind of intelligentized computer programming system, can utilize human expert's knowledge and the method for dealing with problems to handle the problem in certain field, is an important branch of Based Intelligent Control.Expert system has been applied in the automatic control and the many-sides such as PREDICTIVE CONTROL, technological process selection and fault diagnosis of sewage treatment plant, uses for the through engineering approaches of membrane pollution optimized control specialist system of membrane reactor to lay the foundation.
Summary of the invention
The technical problem to be solved in the present invention provides the intelligence control system that a cover is realized the membrane pollution of membrane bioreactor optimal control.This system is foundation with film pollution factor in the membrane bioreactor active sludge intermixture under the different operating modes of handling sanitary sewage to the weight and the direction of film pollution effect, set up membrane biological reactor process parameter regulation and control rule, by making up membrane pollution optimized control specialist system of membrane reactor, prediction and expert diagnosis that realization worsens membrane pollution of membrane bioreactor, and finish the auto-control function, thereby realize that film pollutes effectively delaying of speed, reduces the operating cost and the operation easier of membrane biological reactor process.Effective control that film pollutes can make membrane biological reactor process more be adapted to national conditions, promotes the development of water saving cause.
Realize that the optimal control expert system technology scheme that can delay membrane pollution of membrane bioreactor of the present invention is:
This intelligence control system is made up of five parts, that is: knowledge base, database, inference machine, explanation engine and man-machine interface.Knowledge base is used to deposit diagnostic knowledge and the regulation and control rule rule that film pollutes control; Database is used for storing the intermediate information that produces in raw information that online measuring instrument obtains and the diagnostic procedure, for the reasoning and the explanation of expert system provides data; Inference machine uses the diagnostic knowledge in the knowledge base according to current data message, finishes the reasoning solution procedure of knowledge; Explanation engine by certain interpretation of rules, makes the user understand reasoning process and knowledge of being used and data diagnostic result; Man-machine interface is used for the message exchange between the expert system and the external world.
In the knowledge base the film of depositing pollute the diagnostic knowledge and regular being set as follows of regulation and control of control:
1. when mixed liquor sludge concentration (MLSS) surpasses 10g/L in monitoring membrane bioreactor, start sludge pump immediately automatically and carry out spoil disposal, (F/M) is increased to 0.35kgCOD/kgMLSSd up to sludge loading, closes sludge pump automatically.
Formula 1 has embodied the correlation computations relation of sludge loading and mixed liquor sludge concentration.C in the formula
oBe water inlet COD concentration, mg/L; X is an activated sludge concentration, g/L; Q is a flow of inlet water, m
3/ h; V is the MBR reactor volume, m
3
2. when monitoring the continuous 4h of sludge loading less than 0.3kgCOD/kgMLSSd, or sludge loading has 5 times during less than 0.3kgCOD/kgMLSSd in 24h, automatically start sludge pump and carry out spoil disposal, be increased to 0.35kgCOD/kgMLSSd, close sludge pump automatically up to sludge loading.
3. when monitoring dissolved oxygen concentration (DO), increase aeration rate less than 2mg/L, each increment Delta q=10%Qr, in the formula: Δ q aeration intensity increment, r is a gas-water ratio.
4. cross-flow rate (CFV) is controlled in the 0.3-0.5m/s scope between membrane bioreactor film silk.When monitoring the continuous 4h of cross-flow rate less than 0.3m/s, or cross-flow rate has 5 times less than 0.3m/s within 24h, regulates aeration intensity automatically, and each variable is Δ q=10%Qr.
5. when on-stream pressure (TMP) is increased to greater than 0.045MPa, close water outlet suction pump and inlet water lifting pumps, open backwashing pump flushing 30min, open inlet water lifting pumps and water outlet suction pump after closing backwashing pump.
The raw information that membrane pollution optimized control specialist system of membrane reactor obtains the on-line monitoring instrument is carried out the initial information processing, calculates the degree of membership of each parameter; Mate with the rule in the knowledge base then, employing is based on the confidence level of the uncertain inference technique computes conclusion of CLIPS, size according to confidence level is listed failure cause, and obtain the adjustment direction of operational factor, thereby realize prediction and expert diagnosis, and finish the auto-control function the membrane pollution of membrane bioreactor deterioration.Expert system has self-learning capability, and the case of successful Application expands rule base by system's self study.
Effect of the present invention and benefit are to carry out reasoning and prediction according to the variation of active sludge intermixture character in the reactor, automatic adjusting process parameter, effectively decelerating membrane pollution speed, membrane component and prolong life-span, reduce consumption of chemical agent, can when reducing operating cost significantly, further promote the broader applications of this efficient treatment process of membrane bioreactor.
Embodiment
Be described in detail the specific embodiment of the present invention below in conjunction with technical scheme.
Embodiment
Adopt membrane biological reactor process to handle at a certain hotel waste water, handling the waste water water yield is 60m
3/ d, COD concentration is 300-500mg/L, adopts this intelligence control system that membrane bioreactor is carried out auto-control.
By the automatic Information Monitoring of on-line monitoring instrument.When the mixed liquor sludge concentration surpassed 10g/L, expert system started sludge pump automatically and carries out spoil disposal, up to the sludge loading most 0.35kgCOD/kgMLSSd that raises, closed sludge pump automatically.When monitoring the continuous 4h of sludge loading less than 0.3kgCOD/kgMLSSd, or sludge loading has 5 times during less than 0.3kgCOD/kgMLSSd within 24h, automatically start sludge pump and carry out spoil disposal,, close sludge pump automatically up to the sludge loading most 0.35kgCOD/kgMLSSd that raises.When monitoring dissolved oxygen concentration, regulate fan blower automatically and increase aeration rate, each increment Delta q=10%Qr less than 2mg/L; Promote the back and wait for that 20min monitors once more, if DO is still less than 2mg/L then regulate once more.When monitoring the continuous 4h of cross-flow rate less than 0.3m/s, or cross-flow rate has 5 times during less than 0.3m/s within 24h, and expert system is regulated fan blower automatically and increased aeration rate, each increment Delta q=10%Qr.When monitoring on-stream pressure when being increased to greater than 0.045MPa, expert system is closed water outlet suction pump and inlet water lifting pumps automatically, opens backwashing pump backwash 30min, opens inlet water lifting pumps and water outlet suction pump after closing backwashing pump.
Claims (1)
1. a membrane pollution optimized control specialist system of membrane reactor is made up of five parts: knowledge base, database, inference machine, explanation engine and man-machine interface; Knowledge base is used to deposit diagnostic knowledge and the regulation and control rule rule that film pollutes control; Database is used for storing the intermediate information that produces in raw information that online measuring instrument obtains and the diagnostic procedure, for the reasoning and the explanation of expert system provides data; Inference machine uses the diagnostic knowledge in the knowledge base according to current data message, finishes the reasoning solution procedure of knowledge; Explanation engine by certain interpretation of rules, makes the user understand reasoning process and knowledge of being used and data diagnostic result; Man-machine interface is used for the message exchange between the expert system and the external world; Wherein in the knowledge base the film of the depositing diagnostic knowledge and the regular rule feature of regulation and control of polluting control be:
A) monitor when the mixed liquor sludge concentration surpasses 10g/L in the membrane bioreactor, start sludge pump immediately automatically and carry out spoil disposal, be increased to 0.35kgCOD/kgMLSSd, close sludge pump automatically up to sludge loading;
B) when monitoring the continuous 4h of sludge loading less than 0.3kgCOD/kgMLSSd, or sludge loading has 5 times during less than 0.3kgCOD/kgMLSSd in 24h, automatically start sludge pump and carry out spoil disposal, be increased to 0.35kgCOD/kgMLSSd, close sludge pump automatically up to sludge loading;
C) when monitoring dissolved oxygen concentration, increase aeration rate, each increment Delta q=10%Qr less than 2mg/L;
D) cross-flow rate is controlled in the 0.3-0.5m/s scope between membrane bioreactor film silk, and when monitoring the continuous 4h of cross-flow rate less than 0.3m/s, or cross-flow rate has 5 times less than 0.3m/s within 24h, regulates aeration intensity automatically, and each variable is Δ q=10%Qr;
E) when on-stream pressure is increased to greater than 0.045MPa, close water outlet suction pump and inlet water lifting pumps, open backwashing pump flushing 30min, open inlet water lifting pumps and water outlet suction pump after closing backwashing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012528XA CN101609309B (en) | 2009-07-11 | 2009-07-11 | Membrane pollution optimized control specialist system of membrane reactor |
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|---|---|---|---|
| CN200910012528XA CN101609309B (en) | 2009-07-11 | 2009-07-11 | Membrane pollution optimized control specialist system of membrane reactor |
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| CN101609309A true CN101609309A (en) | 2009-12-23 |
| CN101609309B CN101609309B (en) | 2011-03-23 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794117A (en) * | 2010-02-11 | 2010-08-04 | 哈尔滨工业大学 | Method for optimizing and controlling operation of membrane bioreactor based on mechanism model |
| CN101944275A (en) * | 2010-08-26 | 2011-01-12 | 天津市环境保护科学研究院 | Membrane pollution diagnosis and early warning decision making system of hollow fiber device |
| CN102063062A (en) * | 2011-02-18 | 2011-05-18 | 哈尔滨工业大学 | Sludge bulking control expert system for diagnosis based on filamentous bacteria population structure |
| CN103619761A (en) * | 2011-06-13 | 2014-03-05 | 普莱克斯技术有限公司 | Control system for wastewater treatment plants with membrane bioreactors |
| CN104777610A (en) * | 2015-04-24 | 2015-07-15 | 东莞市微科光电科技有限公司 | Method for finding out reason for making deviation of infrared ending films in subgrouping manner |
| CN106054990A (en) * | 2016-07-04 | 2016-10-26 | 清华大学 | Expert control system and method for landfill leachate processing |
| CN117142630A (en) * | 2023-10-26 | 2023-12-01 | 北京华科仪科技股份有限公司 | Automatic control method and system of rotary disc type biological reaction device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253388C (en) * | 2004-05-12 | 2006-04-26 | 东华大学 | Method and equipment for treatment of polluted fluid |
-
2009
- 2009-07-11 CN CN200910012528XA patent/CN101609309B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794117A (en) * | 2010-02-11 | 2010-08-04 | 哈尔滨工业大学 | Method for optimizing and controlling operation of membrane bioreactor based on mechanism model |
| CN101944275A (en) * | 2010-08-26 | 2011-01-12 | 天津市环境保护科学研究院 | Membrane pollution diagnosis and early warning decision making system of hollow fiber device |
| CN101944275B (en) * | 2010-08-26 | 2012-07-04 | 天津市环境保护科学研究院 | Membrane pollution diagnosis and early warning decision making system of hollow fiber device |
| CN102063062A (en) * | 2011-02-18 | 2011-05-18 | 哈尔滨工业大学 | Sludge bulking control expert system for diagnosis based on filamentous bacteria population structure |
| CN103619761A (en) * | 2011-06-13 | 2014-03-05 | 普莱克斯技术有限公司 | Control system for wastewater treatment plants with membrane bioreactors |
| CN104777610A (en) * | 2015-04-24 | 2015-07-15 | 东莞市微科光电科技有限公司 | Method for finding out reason for making deviation of infrared ending films in subgrouping manner |
| CN104777610B (en) * | 2015-04-24 | 2017-03-15 | 东莞市微科光电科技有限公司 | A kind of method for searching infrared cut coating manufacturing deviation reason using point group's mode |
| CN106054990A (en) * | 2016-07-04 | 2016-10-26 | 清华大学 | Expert control system and method for landfill leachate processing |
| CN117142630A (en) * | 2023-10-26 | 2023-12-01 | 北京华科仪科技股份有限公司 | Automatic control method and system of rotary disc type biological reaction device |
| CN117142630B (en) * | 2023-10-26 | 2024-02-20 | 北京华科仪科技股份有限公司 | Automatic control method and system of rotary disc type biological reaction device |
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| CN101609309B (en) | 2011-03-23 |
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Granted publication date: 20110323 Termination date: 20130711 |