EP1694607A1 - Method for treating fluids by coagulation on membranes - Google Patents
Method for treating fluids by coagulation on membranesInfo
- Publication number
- EP1694607A1 EP1694607A1 EP04805541A EP04805541A EP1694607A1 EP 1694607 A1 EP1694607 A1 EP 1694607A1 EP 04805541 A EP04805541 A EP 04805541A EP 04805541 A EP04805541 A EP 04805541A EP 1694607 A1 EP1694607 A1 EP 1694607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coagulation
- upstream
- membrane
- clarification
- dose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- C02F1/52—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
- 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
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
Definitions
- the present invention relates to a process intended for improving the purification performance of the liquid treatment sector, such as in particular effluents, of the coagulation-clarification-filtration type on membrane (s) as well as for improving the. hydraulic performance of the membrane (s) within such a treatment process (control of clogging).
- micro-, ultra-, nano and hyperfiltration membranes are sensitive to clogging induced by the various particulate, colloidal or dissolved substances contained in the effluents to be filtered, in particular water: suspended matter, organic matter, biological organisms (especially bacteria , yeast, algae) etc.
- Implantation of one or more pretreatment steps aimed at reducing the clogging potential of the fluids before they come into contact with the membrane.
- the pretreatments In addition to reducing the clogging of the membrane, the pretreatments generally bring an improvement in the final quality of the filtered effluent.
- the optimal coagulation dose which, according to the experience acquired by those skilled in the art, is the dose which allows optimized clarification, good quality of clarified water. and which, therefore, will ensure the best operating conditions for the membrane (that is to say the least fouling or clogging conditions for the membrane).
- This so-called “optimal dose” is expressed as a concentration of "active ingredients”.
- active ingredients Those skilled in the art then know: - a mass or molar concentration of metal for the coagulant (s) of mineral nature such as, for example, iron or aluminum salts, - a mass or volume concentration of commercial product or product active, depending on indications of the supplier, in the case of organic coagulants.
- the present invention has set itself in particular objectives: - to improve the quality of the fluid treated by a coagulation-clarification-filtration type filtration on membrane (s), to reduce clogging of the membrane (s) and to improve their hydraulic performance,
- a degraded conduct of the coagulation-clarification step (dose of reagent less than the optimal dose of coagulation) associated with a second coagulation step upstream of the filtration step on membrane (s) made it possible to significantly improve the quality of the filtered effluent and to reduce clogging of the membranes, while retaining an overall dose of coagulant less than or equal at the optimal coagulation dose.
- This observation is all the more surprising since it involves degraded water quality upstream of the membrane (s) and the presence of flocs which, according to those skilled in the art, increase the clogging power of the fluid to be filtered. .
- a double injection of one or more coagulation reagents is carried out respectively in a first zone situated upstream of
- each coagulation zone can be supplied by two or more injection points so as to allow a more gradual addition of the
- object of the present invention is characterized by a distribution of the injection of coagulant (s) between clarification and filtration. on membranes in the following proportions: 75.0 to 125% of the optimal dose of coagulant is injected upstream of the clarification step and 0.1 to 25.0% of the optimal dose is injected, upstream of the filtration step on membranes.
- the injection of one or more coagulation reagents is respectively from 75.0 to 99.9%, preferably from 80.0 to 99.9%, upstream of the '' clarification step and from 0.1 to 20.0%, upstream of the membrane filtration step.
- the injection of one or more coagulation reagents is 90.0 to 99.9% respectively upstream of the clarification step and 0.1 to 10% upstream of the membrane filtration step.
- the present invention is also characterized by the possibility of injecting reagents of different chemical natures respectively upstream of the clarification step and the filtration step on membranes.
- This “staged” conduct of the pretreatment by coagulation-clarification upstream of the membrane has indeed numerous advantages: firstly, a reduction in the clogging of the membrane is observed, which in fact makes it possible to improve the hydraulic performance of the membrane and reducing the surface area of the membrane to be installed (reduction in installation and operating costs), the clogging of the membrane being better controlled, operation and washing procedures are easier to implement work (reduction in operating cost: less frequent washing, lower concentration of washing reagent (s)), the two previous points translate in practice into a reduction in discharges (water losses) and more generally a more environmentally friendly practice.
- the device for implementing the invention comprises a coagulator-flocculator 1 as well as a clarifier 2 (flotation or decanter) into which the raw fluid to be treated is admitted.
- This device can also include a second coagulator-flocculator 3.
- the fluid is filtered through one or more membranes 4 of micro-, ultra-, nano- or hyper-filtration.
- a double injection of one or more coagulation reagents and, for this purpose, two injection zones are provided, as indicated in FIG.
- each coagulation zone No. 1 and / or No. 2 can be supplied by two or more injection points as mentioned above.
- the coagulation reagents can consist of a mixture of reagents.
- the reagents injected in zone number 1 can be different from those injected in zone number 2.
- the coagulation conditions, in particular of pH can be different for the two coagulation stages, these conditions can imply a correction pH upstream from one or both coagulation steps.
- the washing water from the membrane (s) 4 is recycled upstream of the clarification step.
- Channel 1 operated according to the recommendations of a person skilled in the art, that is an injection of 100% of the optimal jar test dose upstream of the settling tank (60 mg / 1 FeC13),
- the double coagulation, object of the present invention and implemented according to the conditions set out above, induces a significant improvement in the quality of the treated effluent: + 4 to + 10% yield of elimination of organic matter (Oxidability , UV, TOC, UV absorbance) for treatment channel 2.
- the optimal dose determined by "floatest” is 10 mg / 1 of FeCl 3 .
- Two coagulation-flotation-filtration treatment channels followed by ultrafiltration membrane (s) were used in parallel: - Channel 1 operated according to a person skilled in the art with an injection of 10 mg / 1 of FeCl 3 upstream of the flotation device, ie 100% of the optimal coagulation dose,
- the SDI of the permeate in the die 2 is 1.7 against 2.4 for the die 1
- the UV absorbance of the sector 2 is 0.230 against 0.296 for the sector 1.
- the filtration flow could be increased by 23%.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0314917A FR2864068B1 (en) | 2003-12-18 | 2003-12-18 | METHOD FOR TREATING FLUIDS BY COAGULATION ON MEMBRANES |
PCT/FR2004/003012 WO2005068376A1 (en) | 2003-12-18 | 2004-11-24 | Method for treating fluids by coagulation on membranes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1694607A1 true EP1694607A1 (en) | 2006-08-30 |
Family
ID=34630299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04805541A Withdrawn EP1694607A1 (en) | 2003-12-18 | 2004-11-24 | Method for treating fluids by coagulation on membranes |
Country Status (15)
Country | Link |
---|---|
US (1) | US7686957B2 (en) |
EP (1) | EP1694607A1 (en) |
CN (1) | CN100427410C (en) |
AU (1) | AU2004313738B2 (en) |
BR (1) | BRPI0417378A (en) |
CY (1) | CY2200148T2 (en) |
EG (1) | EG24568A (en) |
ES (1) | ES2267420T1 (en) |
FR (1) | FR2864068B1 (en) |
IL (1) | IL175707A (en) |
MA (1) | MA28227A1 (en) |
MX (1) | MXPA06006771A (en) |
TN (1) | TNSN06181A1 (en) |
WO (1) | WO2005068376A1 (en) |
ZA (1) | ZA200604716B (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101121553B (en) * | 2006-10-07 | 2010-05-26 | 宋健瑞 | Water treatment technique and device for waterpower osmosis |
FR2909903B1 (en) * | 2006-12-19 | 2009-02-27 | Degremont Sa | METHOD FOR OPTIMIZED MANAGEMENT OF A FILTRATION UNIT ON MEMBRANE, AND INSTALLATION FOR ITS IMPLEMENTATION |
US8496829B2 (en) * | 2007-04-13 | 2013-07-30 | General Electric Company | Method for reducing fouling in microfiltration systems |
FR2922466B1 (en) * | 2007-10-19 | 2010-06-25 | Degremont | METHOD FOR ADVANCED MANAGEMENT OF A MEMBRANE FILTRATION UNIT, AND SYSTEM FOR IMPLEMENTING THE METHOD |
US8491794B2 (en) | 2007-10-23 | 2013-07-23 | Siemens Industry, Inc. | Process for enhanced total organic carbon removal while maintaining optimum membrane filter performance |
US8491788B2 (en) * | 2007-10-23 | 2013-07-23 | Siemens Industry, Inc. | Process for enhanced total organic carbon removal while maintaining optimum membrane filter performance |
US10221084B1 (en) | 2011-09-06 | 2019-03-05 | Liberty Evans, Llc | Headworks and dewatering |
US20150344339A1 (en) * | 2012-12-25 | 2015-12-03 | Toray Industries, Inc. | Water treatment method |
WO2018132306A1 (en) | 2017-01-10 | 2018-07-19 | Vermeer Manufacturing Company | Systems and methods for dosing slurries to remove suspended solids |
CN112830596B (en) * | 2019-11-25 | 2022-08-09 | 福建杰达环保科技有限公司 | Device for removing iron and manganese in water body by membrane combination process |
WO2023097035A1 (en) * | 2021-11-26 | 2023-06-01 | Marmac Water Llc | Methods and systems for streaming current analyzer calibration and reporting |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3117249B2 (en) * | 1991-09-10 | 2000-12-11 | 三菱重工業株式会社 | Septic tank sludge treatment method |
JP3688505B2 (en) * | 1999-03-18 | 2005-08-31 | 富士通株式会社 | Method and apparatus for treating fluorine-containing waste liquid |
FR2802117B1 (en) * | 1999-12-09 | 2002-02-22 | Degremont | IMPROVEMENTS IN MEMBRANE FILTRATION |
US6613230B2 (en) * | 2000-07-07 | 2003-09-02 | Ionics, Incorporated | Method for simultaneous removal of arsenic and fluoride from aqueous solutions |
-
2003
- 2003-12-18 FR FR0314917A patent/FR2864068B1/en not_active Expired - Fee Related
-
2004
- 2004-11-24 ES ES04805541T patent/ES2267420T1/en active Pending
- 2004-11-24 MX MXPA06006771A patent/MXPA06006771A/en active IP Right Grant
- 2004-11-24 WO PCT/FR2004/003012 patent/WO2005068376A1/en active Application Filing
- 2004-11-24 AU AU2004313738A patent/AU2004313738B2/en not_active Ceased
- 2004-11-24 BR BRPI0417378-3A patent/BRPI0417378A/en active Search and Examination
- 2004-11-24 US US10/579,989 patent/US7686957B2/en not_active Expired - Fee Related
- 2004-11-24 CN CNB2004800377642A patent/CN100427410C/en not_active Expired - Fee Related
- 2004-11-24 EP EP04805541A patent/EP1694607A1/en not_active Withdrawn
-
2006
- 2006-05-17 IL IL175707A patent/IL175707A/en not_active IP Right Cessation
- 2006-06-08 ZA ZA200604716A patent/ZA200604716B/en unknown
- 2006-06-13 MA MA29101A patent/MA28227A1/en unknown
- 2006-06-14 EG EGNA2006000558 patent/EG24568A/en active
- 2006-06-15 TN TNP2006000181A patent/TNSN06181A1/en unknown
- 2006-10-12 CY CY20062200007T patent/CY2200148T2/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2005068376A1 * |
Also Published As
Publication number | Publication date |
---|---|
BRPI0417378A (en) | 2007-04-10 |
ES2267420T1 (en) | 2007-03-16 |
FR2864068A1 (en) | 2005-06-24 |
CY2200148T2 (en) | 2010-07-28 |
WO2005068376A1 (en) | 2005-07-28 |
ZA200604716B (en) | 2007-03-28 |
CN100427410C (en) | 2008-10-22 |
AU2004313738A1 (en) | 2005-07-28 |
MXPA06006771A (en) | 2006-08-23 |
FR2864068B1 (en) | 2006-03-03 |
CN1894166A (en) | 2007-01-10 |
EG24568A (en) | 2009-11-01 |
MA28227A1 (en) | 2006-10-02 |
AU2004313738B2 (en) | 2010-10-14 |
US7686957B2 (en) | 2010-03-30 |
TNSN06181A1 (en) | 2007-11-15 |
IL175707A (en) | 2010-12-30 |
US20070080112A1 (en) | 2007-04-12 |
IL175707A0 (en) | 2006-09-05 |
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Legal Events
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
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