CA2186963A1 - High Water Recovery Membrane Purification Process - Google Patents

High Water Recovery Membrane Purification Process

Info

Publication number
CA2186963A1
CA2186963A1 CA2186963A CA2186963A CA2186963A1 CA 2186963 A1 CA2186963 A1 CA 2186963A1 CA 2186963 A CA2186963 A CA 2186963A CA 2186963 A CA2186963 A CA 2186963A CA 2186963 A1 CA2186963 A1 CA 2186963A1
Authority
CA
Canada
Prior art keywords
stage
scale
water
compounds
membrane
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.)
Granted
Application number
CA2186963A
Other languages
French (fr)
Other versions
CA2186963C (en
Inventor
Riad A. Al-Samadi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AL SAMADI RIAD A
Original Assignee
AL SAMADI RIAD A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AL SAMADI RIAD A filed Critical AL SAMADI RIAD A
Priority to CA002186963A priority Critical patent/CA2186963C/en
Priority to US08/942,438 priority patent/US6113797A/en
Publication of CA2186963A1 publication Critical patent/CA2186963A1/en
Application granted granted Critical
Publication of CA2186963C publication Critical patent/CA2186963C/en
Priority to US09/507,697 priority patent/US6461514B1/en
Priority to US12/541,482 priority patent/US7981295B2/en
Priority to US13/184,588 priority patent/US8241503B2/en
Priority to US13/584,209 priority patent/US8506817B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B01D61/026—Reverse osmosis; Hyperfiltration comprising multiple reverse osmosis steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/027—Nanofiltration
    • B01D61/0271—Nanofiltration comprising multiple nanofiltration steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/029—Multistep processes comprising different kinds of membrane processes selected from reverse osmosis, hyperfiltration or nanofiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/04—Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/04—Specific process operations in the feed stream; Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/06—Specific process operations in the permeate stream
    • 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
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Disclosed is a two-stage high pressure high recovery process utilizing two reverse osmosis membrane systems intended to provide very high overall water recoveries from contaminated inorganic scale-containing water in an economical manner while preventing scale formation on the membrane and prolonging the useful life of themembrane. The first stage of the process involves using a low pressure membrane system to preconcentrate scale compounds while purifying the bulk volume of the scale-containing water (using antiscalants with pH control) and combining the influent water with a recycle stream of concentrate from the second stage membrane process in order to prevent scale formation. This first stage membrane system is followed by a second stage membrane system wherein the concentrate from the first stage membrane system is treated further at higher pressure in order to provide purification of the remaining preconcentrated stream and achieve very high overall water recoveries. Scale formation in the first stage and second stage membrane systems is prevented by the recycle of "softened" water containing a very low concentration of scale-forming compounds and containing a high concentration of soluble salts to both stages in a specific proportion that represents an economically viable process, while ensuring adequate permeatequality. The second stage membrane concentrate stream is "softened" whereby hardness compounds such as calcium, magnesium, carbonate, sulphate, silica and other sparingly soluble compounds are removed by suitable means before it is recycled to the twomembrane purifying stages.
CA002186963A 1996-10-01 1996-10-01 High water recovery membrane purification process Expired - Lifetime CA2186963C (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA002186963A CA2186963C (en) 1996-10-01 1996-10-01 High water recovery membrane purification process
US08/942,438 US6113797A (en) 1996-10-01 1997-10-01 High water recovery membrane purification process
US09/507,697 US6461514B1 (en) 1996-10-01 2000-02-22 High water recovery single stage membrane process
US12/541,482 US7981295B2 (en) 1996-10-01 2009-08-14 Enhanced high water recovery membrane process
US13/184,588 US8241503B2 (en) 1996-10-01 2011-07-18 Enhanced high water recovery membrane process
US13/584,209 US8506817B2 (en) 1996-10-01 2012-08-13 Enhanced high water recovery membrane process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002186963A CA2186963C (en) 1996-10-01 1996-10-01 High water recovery membrane purification process

Publications (2)

Publication Number Publication Date
CA2186963A1 true CA2186963A1 (en) 1998-04-01
CA2186963C CA2186963C (en) 1999-03-30

Family

ID=4159004

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002186963A Expired - Lifetime CA2186963C (en) 1996-10-01 1996-10-01 High water recovery membrane purification process

Country Status (2)

Country Link
US (5) US6113797A (en)
CA (1) CA2186963C (en)

Cited By (9)

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ITVR20100127A1 (en) * 2010-06-23 2011-12-24 Alghisi Paolo PLANT AND PROCEDURE FOR THE EXTRACTION OF AMMONIACAL NITROGEN FROM LIQUID WASTE, PARTICULARLY FOR THE REDUCTION OF THE QUANTITY OF WASTE FOR THE SPREADING
CN103172203A (en) * 2013-03-28 2013-06-26 南京中电环保股份有限公司 Pretreatment method of anti-osmosis strong brine
WO2014176082A1 (en) * 2013-04-26 2014-10-30 Dow Global Technologies Llc Water treatment assembly including hyperfiltration module and pressurizable reservoir
WO2019164462A1 (en) * 2018-02-21 2019-08-29 Istanbul Teknik Universitesi Multi-stage reverse osmosis system and process for high water recovery from aqueous solutions
CN111470645A (en) * 2020-05-07 2020-07-31 胡贤友 Reverse osmosis wastewater recycling device
CN113620478A (en) * 2021-09-14 2021-11-09 重庆华捷地热能开发有限公司 Weak-alkalization pressure-reducing reinforced scale separation method
WO2023049978A1 (en) * 2021-09-30 2023-04-06 Safe Water Brasil Ltda - Epp Water treatment method and system with optimized recovery of reverse osmosis wastewater

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