CN104163540A - Ozone feeding automatic control system for ozone-biology combined technology - Google Patents
Ozone feeding automatic control system for ozone-biology combined technology Download PDFInfo
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- CN104163540A CN104163540A CN201310183623.2A CN201310183623A CN104163540A CN 104163540 A CN104163540 A CN 104163540A CN 201310183623 A CN201310183623 A CN 201310183623A CN 104163540 A CN104163540 A CN 104163540A
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 238000005516 engineering process Methods 0.000 title description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 196
- 238000011282 treatment Methods 0.000 claims abstract description 121
- 238000000034 method Methods 0.000 claims abstract description 66
- 238000012545 processing Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 19
- 230000001419 dependent effect Effects 0.000 claims description 35
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 30
- 239000001301 oxygen Substances 0.000 claims description 30
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 239000002351 wastewater Substances 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 25
- 230000003647 oxidation Effects 0.000 claims description 21
- 238000007254 oxidation reaction Methods 0.000 claims description 21
- 238000004065 wastewater treatment Methods 0.000 claims description 15
- 230000005284 excitation Effects 0.000 claims description 12
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000004939 coking Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000011112 process operation Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000012544 monitoring process Methods 0.000 description 6
- 239000010842 industrial wastewater Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 4
- 229960001701 chloroform Drugs 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000002894 chemical waste Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 238000005558 fluorometry Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000202567 Fatsia japonica Species 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 238000003339 best practice Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
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- 238000006385 ozonation reaction Methods 0.000 description 1
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Classifications
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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
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/085—Fluidized beds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/20—Total organic carbon [TOC]
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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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a water treatment system. The system comprises an ozone processing subsystem and a biological processing subsystem; wherein the ozone processing subsystem comprises an ozone generator, which is used to generate ozone added into a water flow to be processed; an ozone processor, which utilizes the ozone to process water and transports the processed water to the biological processing subsystem; at least one water quality parameter indicator, which is used to obtain at least one indicating signal related with the water quality parameters of the measured water, wherein the water quality parameter indicator is arranged on the upstream of the ozone processor, between the ozone processor and the biological processing subsystem, or on the downstream of the biological processing subsystem; and a controller, which is configured to receive at least one indicating signal from at least one water quality parameter indictor and determine the optimal addition amount of ozone in real time according to the at least one indicating signal. The ozone generator supplies ozone to the ozone processor according to the optimal addition amount provided by the controller.
Description
Technical field
The present invention relates to water treatment system, be specifically related to add automatic control for the ozone of water treatment, relate in particular to the ozone for ozone-life assemblage technique in Industrial Wastewater Treatment and add automatic control system.
Background technology
Along with country is more and more stricter to the requirement of industrial production energy-saving and emission-reduction, trade effluent tertiary treatment needs the support of new technology aspect these two of qualified discharge and middle water reuses.Ozone is a kind of high-efficient oxidant that is widely used in the processing of tap water sterilization and disinfection, because its unique oxidation susceptibility aspect hardly degraded organic substance in removing trade effluent, becomes one of optimal selection at present.Yet the preparation of ozone is not cheap, need to consume electric energy and unstripped gas (air or oxygen).Therefore for the hardly degraded organic substance in trade effluent, how the cost-effective ozone that utilizes is removed organism, makes its qualified discharge or recycle, is the research direction of trade effluent tertiary treatment.
Ozone, in oxidation of organic compounds process, normally becomes aldehyde, ketone, alcohols material by organism initial oxidation step by step, and then further mineralising.Owing to generating organic molecule, the oxidation efficiency of ozone reduces gradually along with oxidation process.In engineering practice, the combination process of ozone and biological treatment has utilized the strong oxidizing property of ozone just, obtaining the organic intermediate of readily biodegradable after hardly degraded organic substance ozonize, then utilize the degradation function of biological treatment, further remove the organic intermediate generating.This ozone-life assemblage technique, has utilized ozone and biological treatment advantage separately, makes likely to realize and removes cost-effectively hardly degraded organic substance.
Yet in ozone-life assemblage technique, the dosage of ozone is very crucial parameter.In industrial application due to ozone-life assemblage technique, each system water quality is different, and design variable is also different, and it is very crucial searching out the optimum value that ozone adds.If dosage is very few or too much, all can has influence on the effect of back segment biological treatment, thereby affect the treatment effect of integrally combined technique and increase working cost etc.Therefore,, in engineering practice, controlling optimum ozone dosage is the important factor that determines that can ozone-life assemblage technique successfully be promoted in trade effluent tertiary treatment market.
In the application of ozone in Industrial Wastewater Treatment at present, realize the technical scheme of on-line Control ozone dosage seldom.Because trade effluent variation water quality is larger, if controlling ozone according to the particular case of waste water quality adds, and corresponding adjustment degree of oxidation is guaranteed the validity of follow-up biochemical stage, the optimization control that can bring running cost to save significantly and reach bulk treatment system.Adding online of ozone can adopt different parameters to control, and comprises feature Pollutant levels in tail gas or ozone in water residual concentration and water.In ozone-life assemblage technique, organic concentration and biodegradable are the indexs of paying close attention to the most, so directly monitor organic concentration in waste water, are one of best practice of directly controlling ozone dosage.
Optical detection is measured organic content in waste water its unique technical superiority: system is simple, without adding chemical reagent; Measure rapidly, reading certainty is high; Operation and facility investment are lower etc.Most of organism optical detections adopt ultraviolet absorption method, have many relative commercial products on market.With respect to ultraviolet absorption method, fluorometry is more sensitive, and equipment cost is lower.
Although automatic control system brings many value addeds can to the combination of ozone-biosystem, also rare by the practical application of water quality information on-line Control ozone dosage system in Industrial Wastewater Treatment at present.Reason has two aspects, one be due to ozone-biosystem as the application in waste water tertiary treatment field because the factors such as cost and control accuracy are restricted in the prior art, another is to lack suitable dependable on-line sensor.
Ozone automatic feeding control device based on water pollutant concentration monitor has part Patents and commercially produced product, and great majority are all principle based on uv-absorbing.The index of monitoring is the absorption constant that sample is positioned at wavelength 254nm.UV254 is the optical pickocff principle of organic concentration in the monitoring water of commonly using, its advantage is that dependency is high, simple to operate, easily realize operate continuously, but uv-absorbing needs more accurate light source, general sensor cost is high, and insufficient sensitivity the photofluorometer using with respect to fluorometry.
For example, the flat ozone the controlling of injecting quantity device disclosing for No. 3-56196 in a kind of water treating equipment of Japanese Patent Application Publication JP, wherein ozone is used for removing the stink substance of water, and monitors organic concentration in water with uv-absorbing photometer.
And for example, Japanese Patent Application Publication Unexamined Patent discloses a kind of ozone treatment method for high purification water treatment and device for No. 8-318285, wherein with uv-absorbing photometer, detects organic concentration in water equally.
For another example, Japanese Patent Application Publication Unexamined Patent discloses the control method of ozone injection rate in a kind of water technology for No. 6-269786, wherein ozone is used for removing the stink substance of water, and has used TOC (total organic carbon) analysis meter to measure the total organic carbon concentration in water.
The Patents that utilizes fluorescence to control ozone automatic feeding as index is as follows:
For example, Japanese Patent Application Publication Unexamined Patent discloses a kind of Controlling System of ozone injection device for No. 10-43776, wherein uses fluorescence analyser to detect the organic concentration in water, but its object that adds ozone is to reduce the generation of trichloromethane.
And for example, U.S. Patent Application Publication US2004/0045880A1 discloses a kind of water treatment controlling system that uses fluorescence analyser, wherein used fluorescence analyser to detect the organic concentration in water, but its object that adds ozone is to reduce the generation of trichloromethane equally.
Particularly, trichloromethane is because different organic compositions react the disinfection byproduct (DBP) being detrimental to health generating with chlorine in drinking water treatment process.Visible, No. 10-43776, above-mentioned Japanese Patent Application Publication Unexamined Patent and U.S. Patent Application Publication US2004/0045880A1 are disclosed is in drinking water treatment, to control ozone dosage to reduce the technical scheme of trichloromethane, and reckons without the problem of the online ozone dosage optimization of also failing to solve in trade effluent variation water quality situation.
In addition, be more than to use fluorescence monitoring technology automatically to control ozone dosage.The concrete dosage of ozone only and the direct correspondence of fluorescence reading.In the system of these patents, only there is the single oxidation step of ozone, and do not adopt ozone-life assemblage technique.If process waste water with this single oxidation step of ozone, reach discharge of wastewater index, the ozone amount of consumption is very large, is not practicable wastewater treatment three level methods.
Therefore, in prior art, need a kind of water treatment system, its ozone dosage in can optimization ozone-life assemblage technique, thus improve overall treatment efficiency and reduce running cost.
Summary of the invention
The object of the present invention is to provide a kind of water treatment system, to solve in prior art the problems referred to above in Industrial Wastewater Treatment especially, thereby the ozone dosage in optimization ozone-life assemblage technique, improves the overall treatment efficiency of water treatment and reduces running cost.
In one aspect of the invention, a kind of water treatment system is provided, it comprises: ozonize subsystem, it utilizes ozone to process water, with biological treatment subsystem, the downstream that it is positioned at ozonize subsystem, utilizes biological treatment to process water, wherein ozonize subsystem comprises: ozonizer, and its generation is added to the ozone of processing in current; Ozonize device, it utilizes ozone to process water, and exports the water after ozonize to biological treatment subsystem; At least one water quality parameter indicating meter, for obtaining at least one indicator signal with the water quality parameter of measured water with dependency, described at least one water quality parameter indicating meter is arranged at least one as upper/lower positions: the upstream of ozonize device, between ozonize device and biological treatment subsystem, and the downstream of biological treatment subsystem; And controller, it is configured to receive described at least one indicator signal from described at least one water quality parameter indicating meter, and determine in real time the optimum dosage of ozone according to this at least one indicator signal, wherein: the described optimum dosage that ozonizer is determined based on controller adds ozone to ozonize device.
Ozone-life assemblage technique in trade effluent as tertiary treatment method, there is very high technical feasibility, especially for hardly degraded organic substance, by ozone oxidation, change its biodegradable, by cost-effective biological treatment, further reduce organic content again, make discharge index reach requirement as chemical oxygen demand (COD) (COD), total organic carbon amount (TOC) etc.In this combination, the dosage of ozone has determined day-to-day operation expense, and the generation of ozone need to consume oxygen and electric energy, if can minimize ozone dosage, the application prospect of this combination process can be strengthened greatly.By the present invention, can save ozone dosage, reduce working cost, ozone-life assemblage technique can be used widely in trade effluent.
For the tupe of ozone-life assemblage technique itself and the characteristic of trade effluent, minimize ozone dosage, can have consideration in mind from two aspects: the firstth, according to the influent quality corresponding adjusting ozone dosage that fluctuates.Due to industrial fluctuation, low when high during organic concentration in waste water.According to organic concentration adjustment ozone dosage, can maximizedly reduce operation cost.The secondth, according to the biodegradable of ozonize waste water, regulate ozone dosage, guarantee that the ozone oxidation stage changes into biodegradable chemical constitution hardly degraded organic substance.If ozone dosage is inadequate, the biodegradable of water outlet is inadequate so, thereby back segment biological treatment does not reach intended target, and whole system processing efficiency is low; If ozone adds excessive, although organic concentration declines, ozone adds biodegradable BOD when excessive to be reduced on the contrary, make the treatment effect of biological section bad, even if bulk treatment organism reaches target setting, the ozone that added due to too much, makes running cost higher.
Although the application of the technology that the fluctuation of trade effluent water quality has hindered on-line Control ozone dosage as mentioned above in the ozone-biosystem in Industrial Wastewater Treatment field, but believe at particular industry, such as papermaking, slurrying, coking and petrochemical industry etc., if can realize reliable automatic control platform, according to water quality and back segment biological degradation situation, regulate ozone dosage, thereby reach running cost, minimize, the application prospect of ozone-this combined technology for wastewater treatment of carrying out a biological disposal upon can be strengthened greatly so.
Therefore, technical scheme of the present invention can Real-Time Monitoring combination process interlude in water-quality guideline, guarantee the normal operation of biological treatment section, and the water outlet requirement that touches the mark.
Alternatively, each in described at least one water quality parameter indicating meter is photofluorometer or uv-absorbing photometer, and correspondingly each in described at least one indicator signal is fluorescent signal or uv-absorbing photometric signal.Described water quality parameter can be the ratio of chemical oxygen demand (COD), biological oxygen demand, biological oxygen demand/chemical oxygen demand (COD), or one or more in total organic carbon.Yet organic matter fluorescence signal and organic biodegradable have good dependency.Therefore for specific trade effluent, adopt suitable excitation wavelength, can obtain and the good fluorescent signal of organic concentration dependency.The oxygenant that adopts this fluorescent signal to control ozone stage in ozone-life assemblage technique adds, and can improve the efficiency of whole combination process to organic matter removal, and running cost is reduced.Meanwhile, for the larger feature of trade effluent variation water quality, adopt online technique monitoring treatment effect, also make the stability of engineering be improved, guarantee to reach predefined process effect.In addition, photofluorometer cost is low, easy to use, is preferably suitable as waste water quality monitoring sensor.Particularly, the excitation wavelength of the fluorescent signal using in water treatment system of the present invention is 360-380nm, is preferably 365nm, thereby identical photofluorometer can be applied to the trade effluent of different industries, reduces production and the use cost of system of the present invention.
Described water treatment system is set up the dependent equation of expressing dependency between water quality parameter and indicator signal to handled waste water, thereby described controller is determined corresponding water quality parameter according to described dependent equation by described at least one indicator signal, and then further determine the optimum dosage of ozone by the water quality parameter of determining.In a preferred embodiment, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, described controller draws corresponding water quality parameter according to described dependent equation by the first indicator signal that the first water quality parameter indicating meter obtains, and then further determines the optimum dosage of ozone by the water quality parameter of determining.In another preferred embodiment, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, described controller draws corresponding water quality parameter according to described dependent equation by the second indicator signal that the second water quality parameter indicating meter obtains, and then further determines the optimum dosage of ozone by the water quality parameter of determining.In another preferred embodiment, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, the second indicator signal that the first indicator signal that described controller obtains with the first water quality parameter indicating meter according to described dependent equation and the second water quality parameter indicating meter obtain draws corresponding water quality parameter, and then further determines the optimum dosage of ozone by the water quality parameter of determining.In a preferred embodiment again, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, the 3rd water quality parameter indicating meter is positioned at the downstream of biological treatment subsystem, the first indicator signal that described controller obtains with the first water quality parameter indicating meter according to described dependent equation, the 3rd indicator signal that the second indicator signal that the second water quality parameter indicating meter obtains and the 3rd water quality parameter indicating meter obtain draws corresponding water quality parameter, and then further determine the optimum dosage of ozone by the water quality parameter of determining.
In the present invention, the dependency of water quality parameter and indicator signal is determined and expressed by dependent equation to the data that chamber take off data or on-line measurement obtain by experiment.And the treatment effect that the present invention considers ozone stage and biological section in can various control scheme draws the optimum dosage of ozone, thereby the global optimization of the system performance of realization and cost controls, and is not only that the suboptimization of ozone stage is controlled.
Preferably, water treatment system of the present invention is trade effluent tertiary treatment system, and described ozonize device utilizes ozone to process that to water hardly degraded organic substance is carried out to ozonize.Described water treatment system is for the treatment of the trade effluent of papermaking, slurrying, coking and/or petrochemical industry.Especially, system of the present invention can effectively reduce costs and improve control accuracy in ozone-life assemblage technique of trade effluent tertiary treatment.
In a preferred embodiment of the invention, described controller upgrades described dependency adaptively according to the variation of at least one indicator signal receiving from described at least one water quality parameter indicating meter, thereby described controller can be determined the optimum dosage corresponding to change of water quality in response to the variation of water quality.Like this, the on-line Control of ozone dosage can be adapted to the variation of institute's water quality treatment, thereby guarantees water outlet stay in grade, and reduces the expense of manual calibration.Described system can also comprise storer, for storing the rule of thumb data of the dependency between handled water type and organic concentration; And the type of the handled water that the user of described controller based on described system selects is automatically determined and is upgraded adaptively described dependency.By using the rule of thumb data corresponding to different industries, water treatment system of the present invention can select the rule of thumb data of the water type approaching with the water of required processing as the primary data of optimizing ozone dosage, thereby shorten, optimize required time, reduce the cost of disposing water treatment system of the present invention.
Described ozone oxidation subsystem provided upstream is equipped with leading portion processing subsystem, and described biological treatment subsystem downstream is provided with back segment processing subsystem.Described ozonize subsystem also comprises one or more additional processing devices, described additional processing device is positioned at the downstream of ozone treatment apparatus and the upstream of biological treatment subsystem, and comprise one or more in pH value adjusting device, hydrogen peroxide treatment unit, treatment with ultraviolet light device, wherein: described at least one water quality parameter indicating meter is also arranged on upstream or the downstream of described one or more additional processing devices.
Meanwhile, described water treatment system can obtain necessary waste water treatment process operation information, and can carry out data transmission with the centralized-control center of waste water treatment plant, contributes to realize waste water treatment plant the overall situation of various different industries wastewater treatments is controlled.
The technical parameter that described controller is also additionally considered described ozone generating-device to be to determine in real time the optimum dosage of ozone, so that the output of balance ozone generating-device and ozone add demand in optimal control.For example, described technical parameter can be ozone generating capacity, air or oxygen feed rate of ozone generating-device etc.
Accompanying drawing explanation
Fig. 1 comprises ozone oxidation section and the schematic diagram of the water treatment system of employing ozone-life assemblage technique of the section of carrying out a biological disposal upon;
Fig. 2 is according to the system chart of the water treatment system of employing ozone-life assemblage technique of one embodiment of this invention;
Fig. 3 illustrates the rough schematic view of controlling according to the ozone dosage of one embodiment of this invention;
Fig. 4 illustrates the rough schematic view that ozone dosage is according to another embodiment of the invention controlled;
Fig. 5 be in reflection ozone-life assemblage technique chemical oxygen demand (COD) (COD) and biological oxygen demand (BOD) with the graphic representation of ozone dosage variation;
Fig. 6 illustrates COD signal in one embodiment of the invention and the chart of F fluorescent signal relation; And
Fig. 7 (A)-Fig. 7 (C) illustrates the trade effluent synchronous fluorescent spectrum figure of different sorts trade effluent to the response of different excitation wavelength fluorescent signals.
Embodiment
Below with reference to the accompanying drawings the specific embodiment of the present invention is described in detail.Should be understood that the description of embodiment is intended to schematically illustrate the features such as principle of the present invention and exemplary configurations, method.It will be understood by those skilled in the art that the specific implementation that embodiments of the present invention are not limited to describe in this article, but comprise all embodiments that drop within the scope of the application's claim.
Fig. 1 comprises ozone oxidation section and the schematic diagram of the water treatment system 100 of employing ozone-life assemblage technique of the section of carrying out a biological disposal upon.As schematically illustrated in Fig. 1, ozone-life assemblage technique generally comprises but is not limited to following processing:
Leading portion is processed 101 coagulation and the secondarys (biochemistry) that generally comprise waste water and is processed.Coagulation adopts physical treatment process from waste water, to remove the solid pollutant that is suspended state more, and second-stage treatment adopts biochemical processing method to remove significantly the organic pollutant in waste water conventionally.Preferably, ozone oxidation section and biological treatment section can be used as a part for waste water tertiary treatment.The task of tertiary treatment is generally the hardly degraded organic substance of further removing in pollutent, the especially trade effluent that second-stage treatment fails to remove.
Ozone oxidation section 102 carries out that to take ozone be the high oxidising process on basis conventionally, and can comprise that suitable pH value regulates, with advanced oxidation process of other oxygenants (as hydrogen peroxide) or equipment (as UV) formation etc.
Biological treatment section 103 is carried out biology aerobic processing for low-concentration organic, biological example aerating filter etc. conventionally.
It can be to take mould material as basic filtration that back segment processes 104, as reverse osmosis membrane etc.
Fig. 2 is according to the system chart of the water treatment system 200 of employing ozone-life assemblage technique of one embodiment of this invention.In the embodiment shown in Fig. 2, as example, upstream process technique 201 can comprise coagulation and the second-stage treatment of waste water.Water treatment system 200 also comprises: ozonize subsystem 202, and it utilizes ozone to process water, and biological treatment subsystem 203, and the downstream that it is positioned at ozonize subsystem, utilizes biological treatment to process water.As non-limiting example, biological treatment subsystem can comprise thermopnore bio-reactor 221 and/or biological aerated filter 222.Ozonize subsystem comprises: ozonizer 214, and it uses the oxygen that source of oxygen 211 provides to produce and be added to the ozone of processing in current as raw material, and should understand source of oxygen can provide air or purity oxygen as required; Ozonize device 215, it utilizes ozone to process water, and exports the water after ozonize to biological treatment subsystem 203, and as non-limiting example, ozonize device is embodied as oxidation pond in the present embodiment; As water quality parameter indicating meter, be arranged at respectively the first photofluorometer and second photofluorometer of ozonize device 215 upstream and downstreams, for obtaining at least one indicator signal 218,220 with the water quality parameter of measured water with dependency, and controller 216, it is configured to receive fluorescent signal from the first and/or second photofluorometer, and determine in real time the optimum dosage of ozone according to this at least one indicator signal 218,220, wherein: the optimum dosage that ozonizer 214 is determined based on controller 216 adds ozone to ozonize device 215.It will be understood by those skilled in the art that water quality parameter can include but not limited to the ratio of chemical oxygen demand (COD), biological oxygen demand, biological oxygen demand/chemical oxygen demand (COD), or one or more in total organic carbon.
Fig. 3 is the rough schematic view based on water quality parameter control ozone dosage illustrating according to the water treatment system 300 of a kind of embodiment of the present invention.As example, and unrestricted, in a kind of control method of ozone dosage of the present invention, the dependent equation f1 (COD-1) that can be variable with the COD-1 of ozone oxidation section 302 water inlets is as the control signal of ozone dosage.Or the dependent equation f1 (B/C-2) that the ratio B/C-2 of the biological oxygen demand/chemical oxygen demand (COD) that can intake by ozone oxidation section 302 water outlets/biological treatment section 303 is variable is as the control signal of ozone dosage.The dependent equation f2 (COD-1, B/C-2) that can also be common variable with COD-1 and B/C-2 in addition, is as the control signal of ozone dosage.
Fig. 4 has further shown the rough schematic view of controlling ozone dosage based on water quality parameter indicator signal on the basis of Fig. 3.In Fig. 4, show the upstream that water quality parameter indicating meter is arranged to ozonize device, between ozonize device and biological treatment subsystem, and the embodiment in the downstream of biological treatment subsystem.It will be appreciated by those skilled in the art that and also can only water quality parameter indicating meter be arranged to one or two in above-mentioned three positions.When water quality parameter indicating meter is arranged at upstream and the ozonize device of ozonize device and carries out a biological disposal upon between subsystem, can adopt structure as shown in Figure 2.
In the embodiment depicted in fig. 4, two parameters of COD-1 and B/C-2 as controlled variable can obtain dependent equation by fluorescent signal F-1, F-2 and the F-3 of three different check points.In one embodiment, this dependent equation is as follows:
COD-1＝f1(F-1)；
COD-2＝f1(F-2)；
In addition, can be using COD-3 as guard signal, COD-3=f2 (F-3).
And, can also set up the ratio of biological oxygen demand/chemical oxygen demand (COD) and the dependent equation between fluorescent signal, for example B/C-2=f3 (F-1, F-2, F-3).
It should be noted that concrete dependent equation expression-form is because of system, water quality, pollutant type etc. difference.For example, fluorescent signal F1 is identical with the dependent equation COD-1=f1 (F-1) between fluorescent signal F2 and COD signal COD-2 with the dependent equation COD-1=f1 (F-1) between COD signal COD-1 as shown in Figure 4, but different from the dependent equation COD-3=f2 (F-3) between fluorescent signal F3 and COD signal COD-3.It will be understood by those skilled in the art that, in different embodiments of the present invention, can set up for example dependent equation between BOD, B/C or TOC and fluorescent signal of other water quality parameters, also can set up the dependent equation between a plurality of water quality parameters and fluorescent signal and not depart from the scope of the present invention.Can, according to technical parameter of ozonizer etc., specifically implement the on-line Control of ozone dosage in addition.Typically, it is dependent equation that each waste water system needs to set up a special control method, and can for example, by the water sample of need waste water to be processed being tested to the correlationship drawing between water quality parameter (COD) and fluorescent signal.
In ozone-life assemblage technique, use fluorometric analysis probe according to the power of fluorescent signal in water, and the dependency of organic concentration, biodegradable in fluorescent signal and water, automatically control the dosage of ozone.In example as above, can in the water inlet of ozone process section, detect fluorescent signal, and draw dependent equation according to organic concentration (COD) in fluorescent signal and water.In Practical Project, can also, using the treatment effect of rear end biology section as one of parameter, comprehensively draw control function y=f (x).This control function, comprises two variablees: variable y is ozone dosage, can with the controller communication of ozone generation system, thereby realize on-line Control ozone dosage.Another variable x is fluorescent signal in water (can be one or more fluorescent signals).Typically, the function f adopting in each Waste Water Treatment (x) need to be debugged by real system, in conjunction with organic concentration in water and back segment biological treatment effect, comprehensively draws.If ozone oxidation system also comprises other processing modules, for example pH value regulates, and the additional processing technique such as hydrogen peroxide, UV-light, also can utilize fluorescent signal to control these additional processing technique simultaneously.
The experiment that contriver does based on a kind of waste water shows, in ozonation, in the fluorescent signal of waste water sample and water, organic concentration (expressing by chemical oxygen demand COD) has good dependency.Its result is as shown in Fig. 7 hereinafter, and this fluorescent signal is by the actual on-line measurement gained of the 3DT of nail (unit of length) section photofluorometer.
Fig. 5 be in reflection ozone-life assemblage technique chemical oxygen demand (COD) (COD) and biological oxygen demand (BOD) with the graphic representation of ozone dosage variation.In Fig. 5, the chemical oxygen demand (COD) of waste water represents by curve 501, and the biodegradable of waste water is shown by curve 502.As shown in Figure 5, being accompanied by the increase of ozone dosage, there is first increasing the trend reducing afterwards in biodegradable.Therefore the ozone dosage that, the maximum of BOD is corresponding is optimum dosage.Under this dosage, can realize the treatment effect of biological treatment subsystem in ozonize subsystem and downstream thereof and the optimum balance between cost.
Fig. 6 illustrates COD signal in another embodiment of the invention and the chart of F fluorescent signal relation.Water treatment system of the present invention, in ozone-biological treatment combination process, is controlled ozone oxidation section ozone dosage automatically based on the online fluorescent signal of waste water.Therefore for the variation of different water types and water quality, determining and upgrading COD and photofluorometer reading is that dependency between fluorescent signal is very important.According to embodiment of the present invention, this dependency data that chamber take off data or on-line measurement obtain by experiment determine, and can express by dependent equation, and the input that can realize ozone based on this definite dependent equation is controlled.In Fig. 6, ordinate zou represents the COD signal with PPM ppmWei unit, and X-coordinate represents the fluorescent signal representing with fluorescence counting.As shown in Figure 6, on the data basis obtaining in laboratory measurement data or on-line measurement, can obtain the dependent equation between fluorescent signal and COD, in this example, a kind of polynomial expression Poly. (COD-1=f (F-1)) that the COD-1 that chamber is measured or on-line measurement obtains by experiment and the matching between F-1 data draw dependent equation COD-1=f1 (F-1), this dependent equation is particularly:
COD＝-0.0001(F)
2+0.2687(F)+57.253
Discriminant coefficient R wherein
2=0.7005, show to exist between COD signal and fluorescent signal good dependency.It will be understood by those skilled in the art that dependent equation to depend on concrete system, water quality, pollutant type etc. and different, and can adopt multi-form dependent equation and do not depart from the scope of the present invention.In the Waste Water Treatment of this embodiment, based on this definite dependent equation, realize the input of ozone and control.
Those skilled in the art will appreciate that different trade effluents are different to the response of different excitation wavelength fluorescent signals.Fig. 7 (A) is that the trade effluent synchronous fluorescent spectrum figure of different sorts trade effluent to the response of different excitation wavelength fluorescent signals is shown to Fig. 7 (C), specifically take UV wave band as excitation wavelength detection waste water fluorescent signal trade effluent synchronous fluorescent spectrum figure.As shown above, when excitation wavelength is about 360-380nm, can obtain the fluorescent signal of the maximum intensity of different sorts waste water.In this example, the waste water of testing comprises paper plant's waste water, coking chemical waste water-1 as shown in Fig. 7 (A) and coking chemical waste water-2 as shown in Fig. 7 (A) as shown in Fig. 7 (A).Therefore adopt the excitation wavelength fluorescent signal in this specified range highly sensitive.Preferably, adopt the fluorescent signal that excitation wavelength is 365nm can in different sorts trade effluent, all obtain highly sensitive and reduce the cost that configure and maintenance has the photofluorometer of different excitation wavelengths.
The description that should be understood that said system, module, device, function, method steps only should not be considered as the restriction to the application's protection domain for principle of the present invention is exemplarily described.Can implement the present invention by the various combination mode of said system, modular device, function, method steps.The application's protection domain is defined by the claims.Should also be understood that those skilled in the art can make change and revise and do not depart from protection scope of the present invention said system, module, device, function, method steps.
Claims (18)
1. a water treatment system, it comprises:
Ozonize subsystem, it utilizes ozone to process water, and
Biological treatment subsystem, the downstream that it is positioned at ozonize subsystem, utilizes biological treatment to process water, wherein
Ozonize subsystem comprises:
Ozonizer, its generation is added to the ozone of processing in current;
Ozonize device, it utilizes ozone to process water, and exports the water after ozonize to biological treatment subsystem;
At least one water quality parameter indicating meter, for obtaining at least one indicator signal with the water quality parameter of measured water with dependency, described at least one water quality parameter indicating meter is arranged at least one as upper/lower positions: the upstream of ozonize device, between ozonize device and biological treatment subsystem, and the downstream of biological treatment subsystem; And
Controller, it is configured to receive described at least one indicator signal from described at least one water quality parameter indicating meter, and determines in real time the optimum dosage of ozone according to this at least one indicator signal, wherein:
The described optimum dosage that ozonizer is determined based on controller adds ozone to ozonize device.
2. water treatment system according to claim 1, each in described at least one water quality parameter indicating meter is photofluorometer or uv-absorbing photometer, correspondingly each in described at least one indicator signal is fluorescent signal or uv-absorbing photometric signal.
3. water treatment system according to claim 1 and 2, is characterized in that, described water quality parameter is the ratio of chemical oxygen demand (COD), biological oxygen demand, biological oxygen demand/chemical oxygen demand (COD), or one or more in total organic carbon.
4. water treatment system according to claim 1, it is characterized in that, described water treatment system is set up the dependent equation of expressing dependency between water quality parameter and indicator signal to handled waste water, thereby described controller is determined corresponding water quality parameter according to described dependent equation by described at least one indicator signal, and then further determine the optimum dosage of ozone by the water quality parameter of determining.
5. water treatment system according to claim 4, it is characterized in that, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, described controller draws corresponding water quality parameter according to described dependent equation by the first indicator signal that the first water quality parameter indicating meter obtains, and then further determines the optimum dosage of ozone by the water quality parameter of determining.
6. water treatment system according to claim 4, it is characterized in that, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, described controller draws corresponding water quality parameter according to described dependent equation by the second indicator signal that the second water quality parameter indicating meter obtains, and then further determines the optimum dosage of ozone by the water quality parameter of determining.
7. water treatment system according to claim 4, it is characterized in that, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, the second indicator signal that the first indicator signal that described controller obtains with the first water quality parameter indicating meter according to described dependent equation and the second water quality parameter indicating meter obtain draws corresponding water quality parameter, and then further determines the optimum dosage of ozone by the water quality parameter of determining.
8. water treatment system according to claim 4, it is characterized in that, the first water quality parameter indicating meter is positioned at the upstream of ozonize device, the second water quality parameter indicating meter is between ozonize device and biological treatment subsystem, the 3rd water quality parameter indicating meter is positioned at the downstream of biological treatment subsystem, the first indicator signal that described controller obtains with the first water quality parameter indicating meter according to described dependent equation, the 3rd indicator signal that the second indicator signal that the second water quality parameter indicating meter obtains and the 3rd water quality parameter indicating meter obtain draws corresponding water quality parameter, and then further determine the optimum dosage of ozone by the water quality parameter of determining.
9. water treatment system according to claim 3, is characterized in that: described water treatment system is trade effluent tertiary treatment system, and described ozonize device utilizes ozone to process that to water hardly degraded organic substance is carried out to ozonize.
10. water treatment system according to claim 1, is characterized in that, described water treatment system is for the treatment of the trade effluent of papermaking, slurrying, coking and/or petrochemical industry.
11. water treatment systems according to claim 1 and 2, it is characterized in that, described controller upgrades described dependency adaptively according to the variation of at least one indicator signal receiving from described at least one water quality parameter indicating meter, thereby described controller can be determined the optimum dosage corresponding to change of water quality in response to the variation of water quality.
12. water treatment systems according to claim 1 and 2, is characterized in that, described system also comprises storer, for storing the rule of thumb data of the dependency between handled water type and organic concentration; And the type of the handled water that the user of described controller based on described system selects is automatically determined and is upgraded adaptively described dependency.
13. water treatment systems according to claim 1, is characterized in that, described ozone oxidation subsystem provided upstream is equipped with leading portion processing subsystem, and described biological treatment subsystem downstream is provided with back segment processing subsystem.
14. water treatment systems according to claim 1, it is characterized in that, described ozonize subsystem also comprises one or more additional processing devices, described additional processing device is positioned at the downstream of ozone treatment apparatus and the upstream of biological treatment subsystem, and comprise one or more in pH value adjusting device, hydrogen peroxide treatment unit, treatment with ultraviolet light device, wherein:
Described at least one water quality parameter indicating meter is also arranged on upstream or the downstream of described one or more additional processing devices.
15. water treatment systems according to claim 1, is characterized in that, described water treatment system can obtain waste water treatment process operation information, and can carry out data transmission with the centralized-control center of waste water treatment plant.
16. water treatment systems according to claim 1, is characterized in that, described controller also additionally considers that the technical parameter of described ozone generating-device is to determine in real time the optimum dosage of ozone.
17. water treatment systems according to claim 2, is characterized in that, the excitation wavelength of described fluorescent signal is 360-380nm.
18. water treatment systems according to claim 17, is characterized in that, the excitation wavelength of described fluorescent signal is 365nm.
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| PCT/US2014/036827 WO2014186167A1 (en) | 2013-05-17 | 2014-05-05 | Automatic control system for ozone dosing in the combination of ozone and biotreatment process |
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| CN104163540B (en) | 2016-04-06 |
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