WO2016015888A1 - Regelungsverfahren und -vorrichtung für eine wasserbehandlung - Google Patents
Regelungsverfahren und -vorrichtung für eine wasserbehandlung Download PDFInfo
- Publication number
- WO2016015888A1 WO2016015888A1 PCT/EP2015/060448 EP2015060448W WO2016015888A1 WO 2016015888 A1 WO2016015888 A1 WO 2016015888A1 EP 2015060448 W EP2015060448 W EP 2015060448W WO 2016015888 A1 WO2016015888 A1 WO 2016015888A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- concentration
- parameter set
- micropollutants
- ozone
- determined
- Prior art date
Links
Classifications
-
- 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F3/06—Aerobic processes using submerged filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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]
-
- 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
- C02F2209/22—O2
-
- 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
- C02F2209/23—O3
- C02F2209/235—O3 in the gas phase
-
- 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
Definitions
- the present invention relates to a method and a device for controlling a water treatment plant having the features of claim 1 and claim 10.
- Micropollutants are understood to be organic substances which occur in waters in concentrations in the range of a few nanograms to micrograms per liter and which, even at these concentrations, can influence the course of basic biochemical processes in nature. These include on the one hand many synthetic substances such as drugs, substances with biocidal properties, food additives, ingredients of cosmetics or detergents, etc., but also substances of natural origin such as hormones.
- US 2012/0080374 A1 discloses a process for water treatment in which micropollutants with ozonation and subsequent bioreactors are largely removed or converted into unproblematic products. A regulation of the method is not described.
- COD chemical oxygen demand
- WO 2014/025478 Al discloses a method for controlling a wastewater treatment plant comprising an ozonation and a biological filter.
- the TOC total organic carbon
- the oxidation / reduction potential is measured by means of a sensor which detects the spectral absorption of electromagnetic radiation in the UV spectrum and / or in the visible spectrum. Based on these two values, the ozone supply and, if necessary, the oxygen supply of the biological filter are regulated in order to obtain the desired water quality.
- a major cost factor of the aforementioned plant combination of ozonation and biological filters is the energy consumption of the ozone generator and the production of oxygen.
- the ozone entry should thus be controlled in such a way that in each case only the amount of ozone required for the cleaning purpose is produced and registered.
- Other operating factors influencing factors are the operation of the biologically active filter (backwash intervals). It is therefore desirable to optimize the costs of operating the system combination as efficiently as possible.
- This process achieves the desired reduction of micropollutants in the water with cost effective ozone delivery.
- a concentration of organic water constituents is respectively determined from the second and third parameter set, from which the difference is calculated as the difference between the organic water constituents in the transfer stage and the organic water constituents in the process, wherein a purification step for the biological filter is performed when the Quotient falls below a predetermined minimum value.
- This control step monitors the efficiency of the filter and optionally initiates a purification step.
- all sensors are UV / Vis sensors, which record a UV / Vis absorption spectrum as a parameter set.
- the parameter set comprises the UV / Vis absorption spectrum in the range of 200-700 nm.
- the nitrite concentration is preferably additionally measured, the ozonation being controlled so that at least one of the amounts of ozone corresponding to the amount of nitrite in the ratio of 1: 1 is added to the wastewater stream in the ozonation.
- the concentration of organic water constituents is measured as TOC value.
- the TOC value is a measure of the contamination of the water by the total organic carbon.
- the amount of dissolved ozone in the water is determined on the basis of the second parameter set, whereby the ozone supply of the ozonation is reduced when the dissolved ozone quantity exceeds a predetermined maximum value.
- the ozone supply can be readjusted, so that an unnecessary overdose of ozone can be prevented.
- the measure of the concentration of micropollutants is determined based on at least one selected from the group comprising TOC, DOC and COD.
- COD is a measure of chemical oxygen demand
- DOC is a measure of dissolved organic matter.
- the micropollutants can not be detected directly by the UV / Vis absorption measurement.
- the absorption spectrum is characterized as a function of the micropollutants and a conversion table is created. For this, the micropollutants are measured offline. Based on these conversion tables, the degree of micro-contamination is determined online by evaluating the absorption spectrum. The correlation can be done, for example, using known parameters such as TOC, DOC, COD.
- the water treatment plant is a wastewater treatment plant for municipal wastewater.
- the measure of the concentration of micropollutants is determined on the basis of at least one value selected from the group comprising TOC, DOC and COD.
- concentrations may be determined from the measured parameter set in the transfer stage and in the course in each case. These concentrations are then preferably further utilized in the control and evaluation unit, in which the difference between the concentration of organic water constituents in the transfer stage and the concentration of organic water constituents in the process is calculated and the initiation of a purification step for the biological filter is initiated the quotient of the difference and the concentration of organic water constituents in the transfer stage falls below a predetermined minimum value.
- the functionality of the filter can be monitored by changing the concentration of organic water constituents.
- FIG. 1 shows a schematic representation of a control circuit 1 of a wastewater treatment plant 2 for municipal wastewater.
- the wastewater treatment plant 2 has an inlet 3, an ozonation stage 4, a transfer stage 5, a biological filter 6 and a drain 7 in the flow direction.
- a sensor 8, 9, 10 is provided in each case.
- the coming here for use sensors 8, 9, 10, which detect the spectral absorption of electromagnetic radiation in the UV spectrum and / or in the visible spectrum and thus are particularly sensitive to various ingredients of the wastewater, are hereinafter in accordance with the technical language
- the UV / VIS sensor simultaneously records a complete absorption spectrum, and a mathematical evaluation of the spectra can provide information on common sum parameters such as TOC, COD, DOC and specific parameters such as nitrite.
- the targeted spectral evaluation allows a more accurate statement about the reactions of the organic water constituents with ozone and radicals.This reaction can be used to conclude the reaction of the ozone with the micropollutants.Thus, the mode of action of the ozone entered for the control according to the present invention Invention follow be.
- the arranged in the inlet 3 first UV / Vis sensor 8 is configured to simultaneously detect 256 selected wavelengths in the range of 200-700 nm. From this, the measure of a first concentration of micropollutants, the sum of the organic constituents of water, for example in the form of TOC, and the nitrite concentration of the water before the wastewater treatment can be determined.
- the recorded spectrum characterizes the water to be treated and allows the statement of an initial dosage for the ozone addition. This baseline situation is specific to each water and changes with variations in water composition during operation of the water treatment plant.
- the measured values become passed to an evaluation and control unit 11, which determines based on predetermined data suitable for the measured water matrix ozone dose.
- the calculated ozone dose is passed on to the ozonation stage and the corresponding ozone entry is initiated.
- the ozone in the ozonation stage reacts directly in the water with a variety of inorganic and organic substances. Part of the ozone decomposes in water in the presence of organic carbon and hydroxide ions into radicals that react very rapidly with various substances. Despite their short lifetime and low concentration, they can substantially contribute to the elimination of micropollutants.
- Existing nitrite reacts with ozone to form nitrate. A high nitrite content increases the ozone demand and thus the energy consumption and the costs. According to the measured nitrite concentration in the feed, therefore, the ozone supply must be increased, so that it can be safely assumed that sufficient ozone is available for the elimination of micropollutants or TOC.
- a second UV / Vis sensor 9 is set up to record the absorption spectrum for the previously defined wavelengths again after the ozonation 4.
- the difference between the absorption spectra before and after the ozone entry in relation to the absorption spectrum in the inlet is determined.
- the measured absorption for the respective wavelengths changes due to the addition of ozone into the water.
- the absorption lines in the spectrum decrease.
- the amount of reduction of the individual lines for a specific ozone dosage varies.
- the observed change in the line spectrum reflects the different reaction of the ozone with the water constituents.
- This change also correlates with the degradation of micropollutants and can therefore be converted into a measure of a change in the concentration of micropollutants.
- the dependence of the change of the spectrum on the change of the concentration of micropollutants is measured off-line beforehand. This dataset serves as a basis for the present method.
- One possibility is to determine the change in the concentration of micropollutants as a function of TOC for the data set.
- the necessary ozone addition to achieve the treatment goal is tracked by changing the absorption spectrum. For a specific cleaning objective, the ozone dosage is controlled to achieve a predetermined% change in total absorption reduction.
- the maximum reduction may be in the range of 20-60% reduction in absorption.
- the maximum reduction may be in the range of 40-80%.
- An ozone addition to the degradation of micropollutants is only useful until the maximum reduction of the substance to be degraded or the total absorption. In addition, there is no significant decrease in trace substance of the degraded substance. To maintain an optimized ozone consumption, it is important not to run over this point. By varying the ozone dosage, this value can be set in a desired range.
- Optimal ozone dosage is achieved if the elimination of the trace substances is in a range shortly before the transition into the asymptotic section.
- the filter unit 6 has to fulfill several tasks.
- the mechanical filter properties lead to the retention of turbidity and particles. Due to the specific operation of the system, the filter also works as a bioreactor.
- a bioreactor has microorganisms that are cultivated under optimal conditions.
- the filter also has adsorption effects. In this case, dissolved water constituents are adsorbed on the filter materials. Due to these different filter characteristics, the filter contributes to the further degradation of organic water constituents and other unwanted by-products (eg NDMA).
- the second UV / Vis sensor 9 arranged in the transfer stage 5 measures the entire absorption spectrum of 200-700 nm. From the spectrum, the ozone content in the water is determined by analyzing the UV absorption spectrum at 220 ° C. 350 nm determined. By optimizing the already described part of the control loop, it is to be expected that the ozone dose will be so low that dissolved ozone will no longer be present in the inlet of the filter bed. The measured ozone dose is passed on to the control and evaluation unit 11 and processed there. If the ozone dose is too high, an adjustment of the ozone entry can be made.
- the filter bed retains corpuscular solids and passes the filtrate through.
- the organic substances split by the ozone in the ozonation are largely mineralized by aerobic bacteria in the ozone-free environment of the filter bed.
- special suitably dimensioned activated carbon filters or multi-layer filters are used for biological mineralization.
- the filter performance of the filter system 6 may decrease over time because the filter clogs, for example. To clean the filter this is rinsed free, for example, with water.
- the flushing of the filter is application specific.
- a modified purge of air, air and water or water is provided.
- the control unit of the filter can mimic various washing programs. These are specified by the overall control concept.
- a third UV / Vis sensor 10 is provided in the drain 7.
- the third UV / Vis sensor 10 measures the concentration of trace substances by recording an absorption spectrum of, for example, organic water constituents after the biological filter and passes the value to the control and evaluation unit. There, the difference of the absorption spectra before and after the filter is determined in relation to the absorption spectrum in the transfer stage. This value stands for the efficiency of the biological filter. If the efficiency falls below a certain value, a cleaning of the filter is initiated.
- the cleaning step may include a customized rinse program of the filter and / or other cleaning methods, such as a change in ozone supply.
- For filter operation is typically still the differential pressure in the filter bed and controls the presence of turbidity and particulates in the form of TSS and NTU in front of and behind the filter.
- the absorption spectrum in the outlet 7 is monitored by means of the third sensor 10.
- the evaluation and control unit 11 compares here the determined from the spectrum concentration, for example, to organic water constituents in the form of TOC with a predetermined target range and can increase at a too high concentration, for example, the ozone supply in the ozonization stage.
- fluorescence sensors may also be provided to use fluorescence sensors to measure at least part of the parameters.
- H 2 0 2 In special cases, especially in drinking water treatment, it may be necessary to dose in addition to the ozone an activating chemical such as H 2 0 2 .
- the addition of z. B. H 2 0 2 would be implemented in the control concept as follows: An optional H 2 0 2 dosage can be switched in the program. The required H 2 0 2 dosing amount is adjusted by the program to the determined amount of ozone over a predetermined ratio ozone / H 2 0 2 . Since no H 2 0 2 is desired in the process control measurements are provided in the transfer stage 5 and in the course of the filter.
- the method and the device for controlling can also be used for the treatment of drinking water with ozone biofiltration.
- the regulation of the water treatment plant according to the invention serves to optimize costs but also to ensure process and operational safety.
- the water treatment system can compensate for the control of the invention matrix fluctuations, avoid potential ozone overdose, monitor the efficiency of the biological filter and prevent the penetration of ozone in the process. It can be adjusted by the regulation of the optimal operating point of the system, so that the desired water quality is achieved as cost-effective. Without such a control concept, more resources are often used in practice for safety reasons (eg amount of ozone) than necessary. For an operator, the achievement of the cleaning goal comes first in practice. To achieve this for sure then generally overdosed without the knowledge of the cleaning process, which leads to increased operating costs. The newly developed control concept can help to save up to 50% of the operating costs.
- the control according to the invention allows a targeted metering of the amount of ozone in order to achieve a specific cleaning effect.
- the cleaning effect can relate to the degradation of trace substances and also to the achievement of other cleaning objectives such as disinfection.
- this type of control of the ozone dosage also allows control of the formation of undesirable by-products such as bromate.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES15725528T ES2715514T3 (es) | 2014-07-28 | 2015-05-12 | Procedimiento y dispositivo de regulación para un tratamiento de aguas |
EP15725528.2A EP3174833B1 (de) | 2014-07-28 | 2015-05-12 | Regelungsverfahren und -vorrichtung für eine wasserbehandlung |
US15/329,822 US10287182B2 (en) | 2014-07-28 | 2015-05-12 | Regulating method for a water treatment installation using measured parameters and control of an ozonisation device |
SG11201700663WA SG11201700663WA (en) | 2014-07-28 | 2015-05-12 | Regulating method and regulating device for water treatment |
AU2015295830A AU2015295830B2 (en) | 2014-07-28 | 2015-05-12 | Regulating method and regulating device for water treatment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014010946.1A DE102014010946A1 (de) | 2014-07-28 | 2014-07-28 | Regelungsverfahren und -vorrichtung für eine Wasserbehandlung |
DE102014010946.1 | 2014-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016015888A1 true WO2016015888A1 (de) | 2016-02-04 |
Family
ID=53274495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/060448 WO2016015888A1 (de) | 2014-07-28 | 2015-05-12 | Regelungsverfahren und -vorrichtung für eine wasserbehandlung |
Country Status (7)
Country | Link |
---|---|
US (1) | US10287182B2 (de) |
EP (1) | EP3174833B1 (de) |
AU (1) | AU2015295830B2 (de) |
DE (1) | DE102014010946A1 (de) |
ES (1) | ES2715514T3 (de) |
SG (1) | SG11201700663WA (de) |
WO (1) | WO2016015888A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109143840A (zh) * | 2018-09-18 | 2019-01-04 | 湖南柿竹园有色金属有限责任公司 | 一种尾矿废水处理加药闭环配方控制技术 |
WO2019132655A1 (en) * | 2017-12-29 | 2019-07-04 | Witteveen+Bos N.V. | Method and system for water purification using ozonation |
EP4328195A1 (de) | 2022-08-24 | 2024-02-28 | Indian Oil Corporation Limited | Automatisiertes verfahren zur behandlung von raffinerieabwasser |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3348995B1 (de) * | 2017-01-11 | 2020-05-13 | IKA Neugut | Verfahren zur entfernung von mikroverunreinigungen aus dem abwasser |
DE102019116957A1 (de) * | 2019-06-24 | 2020-12-24 | Go Systemelektronik Gmbh | Verfahren zur Bestimmung der Güte eines spektrometrisch erfassten, eine Eigenschaft eines Fluid betreffenden Parameters |
KR20240022561A (ko) | 2021-06-17 | 2024-02-20 | 비엘 테크놀러지스 인크. | 생물전기화학 센서를 통한 오존 투입 제어 |
CN113651413A (zh) * | 2021-09-22 | 2021-11-16 | 中宜环科仪器江苏有限公司 | 基于抗生素在线监测的臭氧投加控制方法和系统 |
FR3130376A1 (fr) | 2021-12-10 | 2023-06-16 | Suez Groupe | Methode et systeme de controle en ligne de l’elimination de micropolluants des eaux usees d’une unite de traitement |
DE102022201629A1 (de) * | 2022-02-16 | 2023-08-17 | Unisensor Sensorsysteme Gmbh | Verfahren zur kontinuierlichen, zumindest teilweisen Entfernung von Fremdstoffen aus einem Fluid, insbesondere in Abwasser |
CN115417492B (zh) * | 2022-08-30 | 2023-06-20 | 同济大学建筑设计研究院(集团)有限公司 | 基于水下视觉的高级氧化系统及控制方法 |
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-
2014
- 2014-07-28 DE DE102014010946.1A patent/DE102014010946A1/de not_active Withdrawn
-
2015
- 2015-05-12 AU AU2015295830A patent/AU2015295830B2/en active Active
- 2015-05-12 EP EP15725528.2A patent/EP3174833B1/de active Active
- 2015-05-12 US US15/329,822 patent/US10287182B2/en active Active
- 2015-05-12 ES ES15725528T patent/ES2715514T3/es active Active
- 2015-05-12 WO PCT/EP2015/060448 patent/WO2016015888A1/de active Application Filing
- 2015-05-12 SG SG11201700663WA patent/SG11201700663WA/en unknown
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JPH04225896A (ja) * | 1990-12-28 | 1992-08-14 | Meidensha Corp | オゾン注入制御装置 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019132655A1 (en) * | 2017-12-29 | 2019-07-04 | Witteveen+Bos N.V. | Method and system for water purification using ozonation |
EA039913B1 (ru) * | 2017-12-29 | 2022-03-28 | Виттевен+Бос Н.В. | Способ и система очистки воды с использованием озонирования |
CN109143840A (zh) * | 2018-09-18 | 2019-01-04 | 湖南柿竹园有色金属有限责任公司 | 一种尾矿废水处理加药闭环配方控制技术 |
EP4328195A1 (de) | 2022-08-24 | 2024-02-28 | Indian Oil Corporation Limited | Automatisiertes verfahren zur behandlung von raffinerieabwasser |
Also Published As
Publication number | Publication date |
---|---|
SG11201700663WA (en) | 2017-03-30 |
US20180215631A1 (en) | 2018-08-02 |
EP3174833A1 (de) | 2017-06-07 |
EP3174833B1 (de) | 2018-12-12 |
US10287182B2 (en) | 2019-05-14 |
DE102014010946A1 (de) | 2016-01-28 |
AU2015295830B2 (en) | 2018-12-13 |
AU2015295830A1 (en) | 2017-02-02 |
ES2715514T3 (es) | 2019-06-04 |
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