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1. WO2007147013 - COMBINED MEMBRANE-DISTILLATION-FORWARD-OSMOSIS SYSTEMS AND METHODS OF USE

Publication Number WO/2007/147013
Publication Date 21.12.2007
International Application No. PCT/US2007/071141
International Filing Date 13.06.2007
IPC
C02F 1/44 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
44by dialysis, osmosis or reverse osmosis
B01D 61/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02Reverse osmosis; Hyperfiltration
CPC
B01D 1/221
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
1Evaporating
22by bringing a thin layer of the liquid into contact with a heated surface
221Composite plate evaporators
B01D 2317/022
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2317Membrane module arrangements within a plant or an apparatus
02Elements in series
022Reject series
B01D 2317/08
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2317Membrane module arrangements within a plant or an apparatus
08Use of membrane modules of different kinds
B01D 2319/06
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2319Membrane assemblies within one housing
06Use of membranes of different materials or properties within one module
B01D 5/0072
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
5Condensation of vapours; Recovering volatile solvents by condensation
0057in combination with other processes
0072with filtration
B01D 61/00
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
Applicants
  • BOARD OF REGENTS OF THE NEVADA SYSTEM OF HIGHER EDUCATION, ON BEHALF OF THE UNIVERSITY OF NEVADA, RENO [US]/[US] (AllExceptUS)
  • CATH, Tzahi, Y. [IL]/[US] (UsOnly)
  • CHILDRESS, Amy, E. [US]/[US] (UsOnly)
  • MARTINETTI, Christopher, R. [US]/[US] (UsOnly)
Inventors
  • CATH, Tzahi, Y.
  • CHILDRESS, Amy, E.
  • MARTINETTI, Christopher, R.
Agents
  • HECK, Ryan, A.
Priority Data
60/804,64813.06.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COMBINED MEMBRANE-DISTILLATION-FORWARD-OSMOSIS SYSTEMS AND METHODS OF USE
(FR) SYSTÈMES D'OSMOSE DIRECTE À DISTILLATION PAR MEMBRANE COMBINÉE ET PROCÉDÉS D'UTILISATION
Abstract
(EN)
In some embodiments, systems and methods are provided for purifying a liquid, such as an impaired water. In some examples, seawater or brackish water is purified, such as to a potable level. Some configurations provide a system which includes a membrane-distillation unit, such as a vacuum-enhanced direct contact membrane distillation unit. The system also includes a forward-osmosis system, which may include one or more forward-osmosis units. A concentrated draw stream from the membrane-distillation unit, such as a concentrated brine solution, serves as a draw solution for a forward-osmosis unit, which may extract water from a source water, such as an impaired water. In some implementations, the forward-osmosis system includes a second forward-osmosis unit which uses the diluted draw solution from the first forward-osmosis unit as a draw solution to extract water from a source water. The system may include additional components, such as a heater or a buffer tank.
(FR)
L'invention concerne, dans certains modes de réalisation, des systèmes et des procédés pour purifier un liquide, tel que de l'eau polluée. Dans certains exemples, l'eau de mer ou l'eau saumâtre est purifiée, jusqu'à un niveau potable. Certaines configurations permettent d'obtenir un système qui inclut une unité de distillation par membrane, telle qu'une unité de distillation par membrane à contact direct renforcé sous vide. Le système inclut également un système d'osmose directe, qui peut inclure une ou plusieurs unités d'osmose directe. Un flux de puisage concentré provenant de l'unité de distillation par membrane, tel qu'une solution d'eau salée concentrée, sert de solution de puisage pour une unité d'osmose directe, qui peut extraire l'eau de l'eau d'une source, telle que de l'eau polluée. Dans certaines mises en œuvre, le système d'osmose directe inclut une seconde unité d'osmose directe qui utilise la solution de puisage diluée provenant de la première unité d'osmose directe comme solution de puisage pour extraire l'eau à partir de l'eau d'une source. Le système peut inclure des composants additionnels, tels qu'un réchauffeur ou un réservoir tampon.
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Latest bibliographic data on file with the International Bureau