AU2007355782B2 - A method of calculating a water treatment chemical dose - Google Patents
A method of calculating a water treatment chemical dose Download PDFInfo
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- AU2007355782B2 AU2007355782B2 AU2007355782A AU2007355782A AU2007355782B2 AU 2007355782 B2 AU2007355782 B2 AU 2007355782B2 AU 2007355782 A AU2007355782 A AU 2007355782A AU 2007355782 A AU2007355782 A AU 2007355782A AU 2007355782 B2 AU2007355782 B2 AU 2007355782B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000000126 substance Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000002835 absorbance Methods 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 239000005416 organic matter Substances 0.000 claims abstract description 7
- 239000000701 coagulant Substances 0.000 claims description 39
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-BJUDXGSMSA-N carbon-11 Chemical compound [11C] OKTJSMMVPCPJKN-BJUDXGSMSA-N 0.000 claims 1
- 238000004364 calculation method Methods 0.000 abstract description 4
- 235000012206 bottled water Nutrition 0.000 abstract description 3
- 239000003651 drinking water Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 231100000673 dose–response relationship Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 241001633834 Tobiason Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5209—Regulation methods for flocculation or precipitation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1826—Water organic contamination in water
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F2209/005—Processes using a programmable logic controller [PLC]
- C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
-
- 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
- C02F2209/11—Turbidity
-
- 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
- C02F2209/21—Dissolved organic carbon [DOC]
Abstract
This invention provides a method of calculating a water treatment chemical dose for enabling determination of chemical dose in the treatment of raw water to potable water. Preferably, the present invention relates to a method of calculating a water treatment chemical dose enabling predictive calculation of chemical dosage applicable in the treatment of any raw water type with or without local WTP pre-calibration. The method including the steps of: quantifying the turbidity of water as a measure of particulate content; quantifying the ultraviolet absorbance of water as a first measure of natural organic matter (NOM) content; quantifying the dissolved organic carbon (DOC) content of water as a second measure of NOM content; calculating a specific ultraviolet absorbance factor (SUVA) as the ratio of ultraviolet absorbance and dissolved organic carbon; using SUVA to adjust the weightings of the particulate content and NOM content and predicting a water treatment chemical dose from the sum of the particulate content and NOM content.
Description
WO 2009/002192 PCT/NZ2007/000164 A METHOD OF CALCULATING A WATER TREATMENT CHEMICAL DOSE STATEMENT OF CORRESPONDING APPLICATIONS This application is not based on any priority application. 5 TECHNICAL FIELD The present invention relates to a method of calculating a water treatment chemical dose for enabling determination of chemical dose in the treatment of raw water to potable water. Preferably, the present invention relates to a method of calculating a water treatment chemical dose enabling predictive calculation of chemical dosage 10 applicable in the treatment of any raw water type with or without local WTP pre calibration. BACKGROUND ART Treatment of raw water to produce drinking (or potable water) requires the removal of contaminants such as natural organic matter (NOM) and/or particulates which can be 15 harmful to humans if injested. NOM in water contains a mixture of hydrophobic and hydrophilic organic compounds in a range of molecular weights. Compounds with high molecular weight and high hydrophobicity, such as aquatic humics and aquatic fulvics resulting from decaying organic matter like leaves, are more amenable to chemical treatment methods such as coagulation and subsequent solids separation. 20 The coagulant dose required for a given plant and given raw water conditions has traditionally been set based on either the plant operator's experience, physical jar 1 WO 2009/002192 PCT/NZ2007/000164 testing, or by a streaming current meter. Streaming current meters operate under feed back process control, measuring the quality of water after coagulant dosing and adjusting the coagulant dose based on that measurement to achieve a target water quality 5 More recently, feed forward, or predictive, control methods have been used utilising sampling of raw water, prediction of the chemical dose required and dosing accordingly for a given raw water condition. W02005022278 discloses a feed forward/feedback control method using calculation of a purity index based on outgoing water turbidity. A low purity index valve causes a 10 feedback controller to increase the chemical dose and a high purity index value causes the feedback controller to decrease the chemical dose to minimise deviation from the outgoing water turbidity set point. However, the disadvantage with known feedback and feed forward methods is that they can be unreliable with different raw water chemistries with varying particulate and 15 NOM components or with rapidly changing raw water conditions, such as after heavy rain fall, varying WTP flow rate, pH changes resulting from chemical treatment and incomplete mixing of water with the chemical treatment agent. US6408227 discloses a system using predictive dosage based on colour, turbidity and coagulant dosed. Dosage is determined by multiplying the sum of the square colour 20 and turbidity of the untreated water by a conversion factor. The conversion factor is determined by dividing the dosage of coagulant used to achieve the optimum treated water quality by the sum of the square colour and turbidity of the untreated water. 2 WO 2009/002192 PCT/NZ2007/000164 US6408227 describes a system and method for controlling effluents in treatment systems using neural networks, genetic algorithms and deterministic models to control WTPs and predict parameters such as chemical dosage. The disadvantage with these known methods is the need to train the system with 5 historical data to predict chemical dosage before use. It is an object of the present invention to address the foregoing problems or at least to provide the public with a useful choice. All references, including any patents or patent applications, cited in this specification are hereby incorporated by reference. No admission is made that any reference 10 constitutes prior art. The discussion of the reference states what their authors assert, and the applicants reserve the right to challenge the accuracy and pertinence of the cited documents. It will be clearly understood that, although a number of prior art publications are referred to herein, this reference does not constitute an admission that any of these documents forms parts of the common general knowledge in the art, in 15 New Zealand or in any other country. It is acknowledged that the term 'comprise' may, under varying jurisdictions, be attributed with either an exclusive or an inclusive meaning. For the purpose of this specification, and unless otherwise noted, the term 'comprise' shall have an inclusive meaning - i.e. that it will be taken to mean an inclusion of not only the listed 20 components it directly references, but also other non-specified components or elements. This rationale will also be used when the term 'comprised' or 'comprising' is used in relation to one or more steps in a method or process. 3 WO 2009/002192 PCT/NZ2007/000164 Further aspects and advantages of the present invention will become apparent from the ensuing description which is given by way of example only. DISCLOSURE OF INVENTION According to one aspect of the present invention there is provided a method of 5 calculating a water treatment chemical dose including the steps of: * quantifying the turbidity of water as a measure of particulate content; " quantifying the ultraviolet absorbance of water as a first measure of natural organic matter (NOM) content; " quantifying the dissolved organic carbon (DOC) content of water as a second 10 measure of NOM content; * calculating a specific ultraviolet absorbance factor (SUVA) as the ratio of ultraviolet absorbance and dissolved organic carbon; characterised in that the calculated SUVA is used to adjust the weightings of the particulate content and NOM content and predicting a water treatment chemical dose 15 from the sum of the particulate content and NOM content. According to a second aspect of the present invention there is provided a method of calculating a water treatment chemical dose including the steps of: * quantifying the turbidity of water as a measure of particulate content; " quantifying the ultraviolet absorbance of water as a first measure of natural 20 organic matter (NOM) content; 4 WO 2009/002192 PCT/NZ2007/000164 * quantifying the dissolved organic carbon (DOC) content of water as a second measure of NOM content; * calculating a specific ultraviolet absorbance factor (SUVA) as the ratio of ultraviolet absorbance and dissolved organic carbon 5 characterised in that a water treatment chemical dose is calculated with the following algorithm: chemical dose = (((Turbidity A )x B)x C)+ D1+ E x e(U AbsorbancexF) x where A, B, D, E and F are constants; C +(H+I xSUVAJ)K 10 where H, I, J and K are constants; SUVA = UVAbsorbance[/m] , and DOC[mg IL] G = Lx e(Mx(NSUVA))+P where L, M, N and P are constants. It is envisaged the constants A, B, D, E, F H, I, J, K L, M, N and P are predetermined 15 values which can be applied by the user for any water source or selected by the user for a specific water source and/or WTP to increase the accuracy of the predicted water chemical treatment dose. In preferred embodiments the constant A is in the range 150 to 300, constant B is the range 5 to 50, constant D is in the range -2 to -0.2, constant E is in the range 0.1 to 5 WO 2009/002192 PCT/NZ2007/000164 1.5, constant F is in the range 3 to 5, constant H is in the range 2 to 4, constant I is in the range 0.001 to 0.005, constant J is in the range 1 to 5, constant K is in the range 0.5 to 4, constant L is in the range 0.1 to 1.5, constant M is in the range -10 to -50, constant N is in the range -1 to -8 and constant P is in the range 1 to 1.8. 5 In preferred embodiments the ultraviolet absorbance is in the range 250 to 750 nanometres (nm). In preferred embodiments the ultraviolet absorbance is 254 nm. In preferred embodiments the water treatment chemical is a metal based coagulant. In preferred embodiments the water treatment chemical is based on aluminium and 10 iron based coagulant. In preferred embodiments the DOC content of the water is in the range 0 to 50 milligrams per litre (mg/L). In preferred embodiments the particulate content of the water is in the range 0 to 200 nephelometric turbidity units (NTU). 15 It is envisaged the water treatment control method may be used via a control apparatus including a programmable logic unit with computer executable instructions defining the algorithm of the present invention. The present invention may provide many potential advantages over existing systems for water treatment control including: 20 * 'real-time" prediction of coagulant dose with different pre-settings for use with any, or a specific, water source which provides for a reduction in treatment 6 WO 2009/002192 PCT/NZ2007/000164 chemical used, which in turn leads to an economic and operationally efficient treatment of water; * more accurate prediction of coagulant dose and more rapid dose response adjustments to changeable source water quality; 5 0 more stable coagulant dose control since the method of the present invention is unaffected by flocculation pH changes, WTP flow rate, response lag time, pH adjustment chemical additive and coagulant mixing efficiencies; and * an additional user selectable coagulation mode enables the user to optimise treatment for either particulate or NOM removal. 10 BRIEF DESCRIPTION OF DRAWINGS Figure 1 shows an illustration of the correlation of specific ultraviolet absorbance factor (SUVA) (the ratio of ultraviolet absorbance and dissolved organic carbon) with the character of NOM water content. SUVA is a component of the algorithm used to implement the present invention; 15 Figure 2 shows a graph illustrating increasing percentage of dissolved organic carbon (DOC) removal with increasing coagulant dose as a result of implementation of the present invention; Figure 3 shows a schematic diagram of a feed forward coagulant dosage control process used to implement the present invention; 20 FIT refers to Flow Indicating Transmitter; AIT refers to Analyser Instrument Transmitter; 7 WO 2009/002192 PCT/NZ2007/000164 Fx refers to Function block; PID refers to Proportional Integral Derivative; SP refers to Set point; CV refers to Control Value (output from PID block); 5 PV refers to Process value, and VSD refers to Variable speed drive Figure 4 shows a graph of coagulant dose predictions achieved with the present invention over time compared to coagulant dose predictions derived from a streaming current meter of the prior art; 10 Figure 5 shows a composite graph of coagulant dose and water turbidity versus coagulant dose response time using a user and preset mode dosage of the present invention compared to dose predictions derived from a streaming current meter of the prior art. BEST MODES FOR CARRYING OUT THE INVENTION 15 Aspects of the present invention have been described by way of example only and it should be appreciated that modifications and additions may be made thereto without departing from the scope thereof. A correlation is shown in Figure 1 between specific ultraviolet absorbance of water at 254 nm and dissolved organic carbon (DOC) content (Edzwald, J.K. and Tobiason, 20 J.E., "Enhanced versus Optimized Multiple Objective Coagulation", in Chemical Water and Wastewater Treatment V, H.H. Hahn, E. Hoffman and H. Odegaard, Editors, 8 WO 2009/002192 PCT/NZ2007/000164 Springer, New York, pp. 113-124, 1998). Such a relationship is used as the basis of the calculation of coagulant dose in the algorithm of the present invention. Referring to Figure 2 in a relationship of dissolved organic carbon (DOC) percentage removal versus chemical coagulant dose there is seen an exponential phase (A) where 5 increasing coagulant dose results in increasing DOC percentage removal until a plateau is reached where the DOC percentage removal is static at around 78% with increasing coagulant dose (B). At low levels of coagulant dose such that WTP failure is seen (C). The algorithm of the present invention calculates the optimal water treatment coagulant dose for either particulate removal or for maximizing DOC percentage 10 removal but with a minimal coagulant chemical usage. Referring to Figure 3 a preferred feed forward coagulant dosage control process used to implement the present invention in a WTP is generally shown by arrow 1. The WTP must have a coagulant dose pump 2 which can automatically be controlled by a control unit 3 configured with a programmable logic unit (not shown) running the algorithm of 15 the present invention. An analyser instrument transmitter (AIT) 4 measures the turbidity, UV254nm absorbance and DOC of the raw water 5. The algorithm of the present invention determines the coagulant dose set point (mg/litre) 6. The raw water 5 flow rate is measured via a flow instrument transmitter (FIT) 7 and the coagulant flow rate 8 via a flow instrument transmitter (FIT) 9. The raw water 5 flow rate is flow paced 20 with the coagulant flow rate 8 via a variable speed drive 10 and the control unit 3. The coagulant flow rate provides the process variable (PV) 11 and allows the actual coagulant dose to be monitored (in Litres/hour). The control unit 3 is capable of using a proportional integral and derivative control block (PID) 12 and function block 12A.The PID 12 with output via a control valve (CV) 13 is configured with the required coagulant 9 WO 2009/002192 PCT/NZ2007/000164 dose (referred to as the set point (SP) 14 in Litres/hour), the measured coagulant flow (in Litres/hour)' as the PV 11 and the output as the coagulant dose pump stroke 15. The ability of the method of the present invention to more rapidly track changes in water quality and coagulant dose the water accordingly in comparison to known 5 feedback methods, utilising a streaming current meter, is illustrated in Figures 4 and 5. Figure 4 shows tracked changes over a time period of 5.5 weeks. Figure 5 shows a raw water quality change event starting at 19:25 and which peaks at 04:25 the next day as measured by water turbidity. The predicted dose of the feed forward control method of the present invention peaks at 04:25 correlating with the peak of water 10 turbidity whereas the known feedback method peaks significantly later at 09:45. Such rapid changes in chemical dosage of the present invention provides for more consistent water quality. The method of the present invention can be used in two user selectable modes of operation: a conventional mode which predicts the lowest coagulant dose possible to 15 achieve particulate removal and an enhanced mode which predicts the lowest coagulant dose to achieve maximum NOM removal. The conventional mode can account for an up to 15% reduction in chemical dosage in comparison to prior art methods.. 10
Claims (10)
1. A method of calculating a water treatment chemical dose including the steps of: * quantifying the turbidity of water as a measure of particulate content; * quantifying the ultraviolet absorbance of water as a first measure of natural 5 organic matter (NOM) content; * quantifying the dissolved organic carbon (DOC) content of water as a second measure of NOM content; * calculating a specific ultraviolet absorbance factor (SUVA) as the ratio of ultraviolet absorbance and dissolved organic carbon; 10 characterised in that the calculated SUVA is used to adjust the weightings of the particulate content and NOM content and predicting a water treatment chemical dose from the sum of the particulate content and NOM content.
2. A method of calculating a water treatment chemical dose including the steps of: " quantifying the turbidity of water as a measure of particulate content; 15 0 quantifying the ultraviolet absorbance of water as a first measure of natural organic matter (NOM) content; * quantifying the dissolved organic carbon (DOC) content of water as a second measure of NOM content; * calculating a specific ultraviolet absorbance factor (SUVA) as the ratio of 20 ultraviolet absorbance and dissolved organic carbon 11 WO 2009/002192 PCT/NZ2007/000164 characterised in that a water treatment chemical dose is calculated with the following algorithm: chemical dose = (((Turbidity A 1+ Ex(As F DxGJ where A, B, D, E and F are constants; 5 C= ( + K (H + I x SUVAJ) where H, I, J and K are constants; SUVA = UVAbsorbance[/m] and DOC[mgIL] G= Lxe (MX"(NxSUVA)) where L, M, N and P are constants. 10
3. A method of calculating a water treatment chemical dose as claimed in claim 2 wherein the constant A is in the range 150 to 300, constant B is the range 5 to 50, constant D is in the range -2 to -0.2, constant E is in the range 0.1 to 1.5, constant F is in the range 3 to 5, constant H is in the range 2 to 4, constant I is in the range 0.001 to 0.005, constant J is in the range 1 to 5, constant K is in the range 0.5 to 4, constant L 15 is in the range 0.1 to 1.5, constant M is in the range -10 to -50, constant N is in the range -1 to -8 and constant P is in the range 1 to 1.8.
4. A method of calculating a water treatment chemical dose as claimed in claim 1 or claim 2 wherein the ultraviolet absorbance is in the range 250 to 750 nanometres (nm). 12 WO 2009/002192 PCT/NZ2007/000164
5. A method of calculating a water treatment chemical dose as claimed in claim 4 wherein the ultraviolet absorbance is 254 nm.
6. A method of calculating a water treatment chemical dose as claimed in claim 1 or claim 2 wherein the water treatment chemical is a metal based coagulant. 5
7. A method of calculating a water treatment chemical dose as claimed in claim 6 wherein the water treatment chemical is based on aluminium and iron based coagulant.
8. A method of calculating a water treatment chemical dose as claimed in claim 1 or claim 2 wherein the DOC content of the water is in the range 0 to 50 milligrams per 10 litre (mg/L).
9. A method of calculating a water treatment chemical dose as claimed in claim 1 or claim 2 wherein the particulate content of the water is in the range 0 to 200 nephelometric turbidity units (NTU).
10. A method of calculating a water treatment chemical dose as claimed in claim 1 15 or claim 2 wherein the method is used via a control apparatus including a programmable logic unit with computer executable instructions defining the algorithm of the present invention. 20 13
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/NZ2007/000164 WO2009002192A1 (en) | 2007-06-22 | 2007-06-22 | A method of calculating a water treatment chemical dose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2007355782A1 AU2007355782A1 (en) | 2008-12-31 |
| AU2007355782B2 true AU2007355782B2 (en) | 2013-09-19 |
Family
ID=40185845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007355782A Ceased AU2007355782B2 (en) | 2007-06-22 | 2007-06-22 | A method of calculating a water treatment chemical dose |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2007355782B2 (en) |
| WO (1) | WO2009002192A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013102810A1 (en) * | 2012-04-12 | 2013-10-17 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Method for detecting and / or monitoring the solids content of raw water production from wells |
| CA2989452C (en) * | 2015-06-23 | 2020-06-02 | Trojan Technologies | Process and device for the treatment of a fluid containing a contaminant |
| CN107922213A (en) * | 2015-08-05 | 2018-04-17 | 三菱重工业株式会社 | The control method of water treatment system, power plant and water treatment system |
| FR3083868B1 (en) | 2018-07-13 | 2020-07-17 | Suez Groupe | METHOD FOR DETERMINING A COAGULANT DOSE FOR THE TREATMENT OF RAW WATER |
| WO2020012022A1 (en) | 2018-07-13 | 2020-01-16 | Suez Groupe | Method for determining a dose of coagulant for treating raw water |
| WO2020099723A1 (en) * | 2018-11-14 | 2020-05-22 | Kemira Oyj | Measuring and controlling organic matter in waste water stream |
| JP7234013B2 (en) * | 2019-04-04 | 2023-03-07 | 株式会社東芝 | Driving support device, driving support method and computer program |
| FR3106131B1 (en) | 2020-01-10 | 2022-07-01 | Suez Groupe | Method for defining and regulating a dose of coagulant for coagulation treatment of raw water |
| CN111693522B (en) * | 2020-05-29 | 2021-11-02 | 苏州科技大学 | On-line characterization method for urban water pollution degree |
| CN114624152B (en) * | 2022-05-16 | 2022-08-12 | 生态环境部长江流域生态环境监督管理局生态环境监测与科学研究中心 | Method for testing organic carbon source of water body particles and related equipment |
| CN116242793A (en) * | 2023-01-08 | 2023-06-09 | 北京工业大学 | Method for comparing inhibition degree of photocatalytic removal of different natural organic matters on antibody |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400137A (en) * | 1993-08-11 | 1995-03-21 | Texaco Inc. | Photometric means for monitoring solids and fluorescent material in waste water using a stabilized pool water sampler |
| US5489977A (en) * | 1993-08-11 | 1996-02-06 | Texaco Inc. | Photomeric means for monitoring solids and fluorescent material in waste water using a falling stream water sampler |
| WO2000064821A1 (en) * | 1999-04-23 | 2000-11-02 | Clear Value, Inc. | Potable water treatment system and method of operation thereof |
-
2007
- 2007-06-22 WO PCT/NZ2007/000164 patent/WO2009002192A1/en active Application Filing
- 2007-06-22 AU AU2007355782A patent/AU2007355782B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5400137A (en) * | 1993-08-11 | 1995-03-21 | Texaco Inc. | Photometric means for monitoring solids and fluorescent material in waste water using a stabilized pool water sampler |
| US5489977A (en) * | 1993-08-11 | 1996-02-06 | Texaco Inc. | Photomeric means for monitoring solids and fluorescent material in waste water using a falling stream water sampler |
| WO2000064821A1 (en) * | 1999-04-23 | 2000-11-02 | Clear Value, Inc. | Potable water treatment system and method of operation thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009002192A1 (en) | 2008-12-31 |
| AU2007355782A1 (en) | 2008-12-31 |
| WO2009002192A9 (en) | 2009-09-24 |
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