CN2701857Y - Fuzzy controller for short range nitration biological denitrification process by SBR process - Google Patents
Fuzzy controller for short range nitration biological denitrification process by SBR process Download PDFInfo
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- CN2701857Y CN2701857Y CNU2004200478068U CN200420047806U CN2701857Y CN 2701857 Y CN2701857 Y CN 2701857Y CN U2004200478068 U CNU2004200478068 U CN U2004200478068U CN 200420047806 U CN200420047806 U CN 200420047806U CN 2701857 Y CN2701857 Y CN 2701857Y
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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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- Activated Sludge Processes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a fuzzy controller for short range nitration biological denitrification process by an SBR method, which is characterized in that an SBR reaction tank is connected with a water inlet pipe, a water outlet pipe and a mud discharging pipe, and the water outlet pipe is connected with a decanter; a dissolved oxygen concentration DO sensor, a redox potential ORP sensor and a pH value sensor are arranged in the SBR reaction tank; after the sensors are connected with a DO measuring instrument, an ORP measuring instrument and a pH meter, the sensors are connected with an input interface of a data signal of a computer, and an output interface of the data signal of the computer is connected with an actuating mechanism through leads. A water inlet relay, a water out relay, an aeration relay, a relay of a dispensing metering pump, a relay of a carbon source dosing metering pump and a mixer relay of the actuating mechanism are respectively and electrically connected with a water inlet valve, a water out valve, an air inlet valve of an aerator, the dispensing metering pump, the carbon source dosing metering pump and a mixer through the interfaces. The utility model has the advantages of high denitrification efficiency, low self-control operation cost, stable operation, etc., and the sludge bulking phenomenon is not easy to occur.
Description
Technical field
The utility model relates to a kind of wastewater treatment equipment, particularly the treatment unit of intermittent activated sludge wastewater biological denitrificaion.
Background technology
The SBR method is the general abbreviation of intermittent activated sludge water treating method, and its treatment unit connects water inlet pipe, rising pipe and shore pipe by the sbr reactor pond, has only a reaction tank, and floor space is little, is a kind of activated sludge process waste water treatment process of routine.Short distance nitration bio-denitrifying sewage technology is an important research direction in the current water pollution control field, has caused the common concern of countries in the world, and its treatment unit is made up of reaction tank and stirrer.Because the operation of existing sewage treatment process and device is by manual control, aeration time and churning time can not be controlled automatically and usually cause technology fuzzy controller fluctuation of service, for municipal effluent, nitrogenous trade effluent, the clearance of total nitrogen only between 10%～30%, also contains a large amount of nitrogen and phosphorus in the water outlet.Along with becoming increasingly conspicuous of surface water body " eutrophication " phenomenon, the intellectuality of waste disposal plant and automatic control are extremely urgent.
Technology contents
The purpose of this utility model provides a kind of SBR method short distance nitration biological denitrification process fuzzy controller, and the operation that solves existing waste disposal plant is by the low problem of the clearance of manual control, fluctuation of service and nitrogen, phosphorus.
The technical solution of the utility model: this SBR method short distance nitration biological denitrification process fuzzy controller, connect water inlet pipe by the sbr reactor pond, rising pipe and shore pipe, it is characterized in that: its rising pipe with strain hydrophone and be connected, be built-in with dissolved oxygen concentration DO in the sbr reactor pond, redox potential ORP transmitter and pH value transmitter, the sensor is through lead and DO determinator, the ORP determinator is connected the back and is connected with the data signal input interface of computer with the pH meter, the data signal output interface of computer, connect topworks, the water inlet rly. of topworks through lead, the water outlet rly., the aeration rly., dosing pump rly., add carbon source volume pump rly., the stirrer rly. through interface respectively with inlet valve, flowing water Valve, the aerator air intake valve, the dosing pump, adding carbon source volume pump and stirrer is electrically connected.
Beneficial effect: the utility model combines the characteristics of SBR intermittent activated sludge water treatment device and short distance nitration sewage biological denitrifying device, realized automatic control, and the clearance height of stable, nitrogen, phosphorus, can control the aeration time and the churning time of biological denitrification process in real time, realization is to the control of nitrification and denitrification time, stable nitrite accumulation in the control reaction system, thus make nitrated type lasting stability on short distance nitration.Processing method of the present utility model compared with prior art,
Have following advantage:
(1), can adopt aerobic aeration and anoxia stirring time in the Fuzzy control system control biological denitrification process, fundamentally solved the not enough caused nitrated or denitrification of aeration or churning time not exclusively and aeration or the long running cost raising that brings of churning time and the problem of energy dissipation.And can control the required pharmaceutical quantities that adds of each biochemical reaction, reaction times in real time according to the variation of the raw water quality water yield, realize intelligentized control, optimize energy-conservation under the prerequisite of assurance effluent quality.
(2), control aeration and churning time in good time, avoided short distance nitration to finish, still continue the generation of the excessive aeration phenomenon of aeration, under the nitrite accumulation condition, do not provide sufficient dissolved oxygen for the nitrate bacterium, make the nitrite nitrogen of nitrated generation in the reaction tank in time be reduced to nitrogen through anoxia stirring,, fundamentally do not suppress the growth of Nitromonas for Nitromonas provides growth required substrate.Therefore, fundamentally reduced short distance nitration, made the short distance nitration type more stable, lasting to the possibility that traditional complete nitrification transforms.
(3), the utility model can adopt SBR technology, makes organism and nitrogenous compound obtain removing in a reaction tank, reduced anoxic pond and settling tank etc. and handled structures, thereby reduced the floor space of initial cost and whole technology.
(4), adopt the short distance nitration biological denitrification process, thereby it has saved aerobic stage oxygen-supplying amount about 25%; Save the required carbon source about 40% of denitrification; Reduce the mud growing amount; Reduce the throwing alkali number of nitrifying process; Shorten the reaction times, correspondingly reduced reaction tank volume about 30%～40%.
(5), can use Fuzzy control system and make sewage treatment process easy to operate, expense is low, anti impulsion load is strong, is difficult for taking place sludge bulking.
(diluent of TN=500～600mg/L) is former water for pH=4～5, COD=10000～15000mg/L with the actual soybean wastewater of certain food processing enterprises discharging.The COD concentration of mixed solution maintains 400～800mg/L, NH in the selected sbr reactor pond useful volume 38L, reaction tank
4 +-N concentration is at 65～75mg/L, and initial MLSS is at 3-5～4-0g-L in the reaction tank
-1, aeration rate is constant in 0-6m
3/ h, mud maintains about 50d age, 25 ℃ of temperature of reaction.After implementing fuzzy control, at aerobic aeration stage nitrite accumulative total rate (NO
2 --N/NO
x --N) maintain all the time more than 96%, be typical short distance nitration type; The clearance of COD, ammonia nitrogen and total nitrogen remains at more than 90%, 99% and 92% in the reaction tank final outflow water.
Samll cities and towns' municipal effluent or organism, nitrogen content changed the processing of trade effluent greatly during the utility model can be widely used in, and were specially adapted to adopt the sewage work of SBR technology or the sewage work of preparing to adopt SBR technology.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the synoptic diagram of SBR method short distance nitration biological denitrification process.
Among the figure, the 1-water inlet pipe, the 2-rising pipe, the 3-shore pipe, the 4-rly. of intaking, 5-water outlet rly., 6-aeration rly., 7-dosing pump rly., 8-adds carbon source volume pump rly., 9-stirrer rly., the 10-DO transmitter, the 11-ORP transmitter, the 12-pH transmitter, the 13-signal output interface, the 14-aerator, the 15-stirrer, 16-dosing pump, the 17-carbon source adds volume pump, the 18-pH meter, the 19-ORP determinator, the 20-DO determinator, the 21-signal input interface, the 22-signal output interface, the 23-computer, 24-topworks, the 25-SBR reaction tank, 26-strains hydrophone.
Embodiment
The embodiment of this SBR method short distance nitration biological denitrification process fuzzy controller is referring to Fig. 1, it connects water inlet pipe 1 by sbr reactor pond 25, rising pipe 2 and shore pipe 3, be built-in with dissolved oxygen concentration DO transmitter 10 in the sbr reactor pond, redox potential ORP transmitter 11 and pH value transmitter 12, the sensor is through lead and DO determinator 20, ORP determinator 19 is connected the back and is connected with the data signal input interface 21 of computer 23 with pH meter 18, the data signal output interface 22 of computer, connect topworks 24 through lead, the water inlet rly. 4 of topworks is electrically connected through the valve of interface with water inlet pipe 1, water outlet rly. 5 is electrically connected with the valve of straining hydrophone through interface, aeration rly. 6 is electrically connected through the air intake valve of interface with aerator 14, dosing pump rly. 7 is electrically connected with dosing pump 16 through interface, add carbon source volume pump rly. 8 and be electrically connected with adding carbon source volume pump 17 through interface, stirrer rly. 9 is electrically connected with stirrer 15 through interface.
Parts such as transmitter of the present utility model, determinator, computer, rly., volume pump all can adopt existing moulding product.Straining hydrophone 26 can make by oneself, also can be with reference to the structure fabrication of existing Chinese patent ZL02121083.7.
The utility model fuzzy control method is as follows:
Place three kinds of transmitters in Sewage treatment systems, gather redox potential (ORP), the signal of dissolved oxygen concentration (DO) and pH value is as the Be Controlled variable of SBR method denitrification process; ORP, DO and the pH value signal gathered are imported analog digital conversion element A/D through transmitter, convert numerary signal to; Numerary signal is imported computer, calculating, obfuscation through the manipulated variable deviation calculate, with the fuzzy control rule of input in advance relatively, fuzzy control (FuzzyControl) system, Fuzzy Set Theory and the fuzzy predication method of using zadeh and Mamdani carry out the fuzzy control reasoning, after non-Defuzzication calculates, obtain the fuzzy control variable; Convert the fuzzy control variable to control signal through digital-to-analogue conversion element D/A again; Control signal control topworks, aeration rate, the medicament of directly controlling the sewage disposal denitrification process add and the reaction times.
The operating procedure that the utility model is used is referring to Fig. 2:
At first pending waste water enters the sbr reactor pond under fuzzy control is regulated, the active sludge that is deposited in the reaction tank bottom is seethed with excitement, and with former water thorough mixing, stops water filling after the appointment liquid level is filled with or arrived to reaction tank, enters the II step.
In the II step, open gas blower and carry out aeration, and the control aeration rate is 0-6m
3/ h, the pressurized air that is provided by gas blower enters aerator by inlet pipe, with the form of micro-bubble to the efficient oxygen supply of active sludge intermixture, and sewage is fully contacted with active sludge, and purpose is to utilize the microorganism in the active sludge that organic pollutant is degraded and finishes the short distance nitration effect of nitrogenous compound.Whole process is implemented control by Fuzzy control system, main according to the DO that is settled in the reaction tank, the unique point that ORP and pH transmitter are shown in organic matter degradation and short distance nitration process is obtained organic matter degradation situation and the short distance nitration situation in the reaction tank indirectly, by computer the data of being obtained are handled again, finally reach control to aeration time, after computer obtains characterizing the signal that short distance nitration finishes, assign the instruction that stops aeration to gas blower at once, avoid because of long-time aeration makes the generation of short distance nitration to traditional complete nitrification conversion phenomenon, system enters III road step then.
When Step II finishes, system enters the anoxic denitrification stage, i.e. III step, at first the data that obtain according to Step II are by the nitrite nitrogen concentration in the computer forecast reaction system, and add volume pump to carbon source and send instruction, make the carbon source amount that adds just satisfy the needed amount of denitrification, avoid adding that organic content exceeds standard in the denitrification water outlet that too much carbon source causes.Carbon source adds volume pump when adding carbon source, open agitator motor, make the nitrite nitrogen that generates at aeration phase be converted into nitrogen through the denitrifying bacteria effect, realize the removal to total nitrogen, the control of churning time still adopts ORP and pH as the fuzzy control of controlled variable in real time.
When whipping step finishes, in the quiescent setting stage, enter the IV step, by the computer control sedimentation time.
After settling step finished, drain step started, and enters the V step.Draining is finished according to the time technology fuzzy controller in the computer by straining hydrophone.
Draining finishes to begin to be defined as lay-up period, i.e. VI step to next cycle.The time length of lay-up period is fixing, adjusts at any time according to actual sewage water quality and the water yield.
Total system repeats water inlet, aeration, stirring, precipitation, draining and idle 6 steps in turn by computer control, make total system be in aerobic, anoxic, anaerobism alternative state all the time, intermittent water inflow and water outlet, and when each end cycle, regularly discharge remaining active sludge via shore pipe and mud valve.
Claims (1)
1, a kind of SBR method short distance nitration biological denitrification process fuzzy controller, connect water inlet pipe by the sbr reactor pond, rising pipe and shore pipe, it is characterized in that: its rising pipe with strain hydrophone and be connected, be built-in with dissolved oxygen concentration DO in the sbr reactor pond, redox potential ORP transmitter and pH value transmitter, the sensor is through lead and DO determinator, the ORP determinator is connected the back and is connected with the data signal input interface of computer with the pH meter, the data signal output interface of computer, connect topworks, the water inlet rly. of topworks through lead, the water outlet rly., the aeration rly., dosing pump rly., add carbon source volume pump rly., the stirrer rly. through interface respectively with inlet valve, flowing water Valve, the aerator air intake valve, the dosing pump, adding carbon source volume pump and stirrer is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200478068U CN2701857Y (en) | 2004-03-26 | 2004-03-26 | Fuzzy controller for short range nitration biological denitrification process by SBR process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2004200478068U CN2701857Y (en) | 2004-03-26 | 2004-03-26 | Fuzzy controller for short range nitration biological denitrification process by SBR process |
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| CN2701857Y true CN2701857Y (en) | 2005-05-25 |
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| CNU2004200478068U Expired - Fee Related CN2701857Y (en) | 2004-03-26 | 2004-03-26 | Fuzzy controller for short range nitration biological denitrification process by SBR process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364902C (en) * | 2006-06-01 | 2008-01-30 | 北京工业大学 | Control apparatus and method for pulse water-feeding SBR deep denitrogenation process and course |
| CN100498832C (en) * | 2007-07-06 | 2009-06-10 | 北京工业大学 | Device and method for quickly realizing short range biological denitrification by salinity suppressing combined with fuzzy control |
| CN101407776B (en) * | 2008-11-28 | 2011-10-26 | 北京工业大学 | Method for optimizing activated sludge population structure and enriching ammonia oxidation bacteria |
| CN112250169A (en) * | 2020-11-10 | 2021-01-22 | 北京顺时环保有限公司 | Electricity-saving device and electricity-saving method for small sewage treatment equipment |
-
2004
- 2004-03-26 CN CNU2004200478068U patent/CN2701857Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100364902C (en) * | 2006-06-01 | 2008-01-30 | 北京工业大学 | Control apparatus and method for pulse water-feeding SBR deep denitrogenation process and course |
| CN100498832C (en) * | 2007-07-06 | 2009-06-10 | 北京工业大学 | Device and method for quickly realizing short range biological denitrification by salinity suppressing combined with fuzzy control |
| CN101407776B (en) * | 2008-11-28 | 2011-10-26 | 北京工业大学 | Method for optimizing activated sludge population structure and enriching ammonia oxidation bacteria |
| CN112250169A (en) * | 2020-11-10 | 2021-01-22 | 北京顺时环保有限公司 | Electricity-saving device and electricity-saving method for small sewage treatment equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050525 Termination date: 20130326 |