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1. (WO2008025077) LOW PRESSURE BACKWASH
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2008/025077 International Application No.: PCT/AU2007/001252
Publication Date: 06.03.2008 International Filing Date: 30.08.2007
Chapter 2 Demand Filed: 30.04.2008
IPC:
B01D 65/00 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
65
Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
Applicants:
SIEMENS WATER TECHNOLOGIES CORP. [US/US]; 181 Thorn Hill Road Warrendale, Pennsylvania 15086, US (AllExceptUS)
BILTOFT, Bruce, Gregory [AU/AU]; AU (UsOnly)
CAO, Zhiyi [AU/AU]; AU (UsOnly)
LAZAREDES, Huw, Alexander [AU/AU]; AU (UsOnly)
ZHA, Fufang [AU/AU]; AU (UsOnly)
LY, Lyvonne [AU/AU]; AU (UsOnly)
Inventors:
BILTOFT, Bruce, Gregory; AU
CAO, Zhiyi; AU
LAZAREDES, Huw, Alexander; AU
ZHA, Fufang; AU
LY, Lyvonne; AU
Agent:
SHELSTON IP; 60 Margaret Street Sydney, NSW 2000, AU
Priority Data:
200690476331.08.2006AU
Title (EN) LOW PRESSURE BACKWASH
(FR) RÉEXTRACTION BASSE PRESSION
Abstract:
(EN) A method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a low-pressure gas to the permeate remaining present in the system when the filtration process is stopped or suspended to provide liquid for backwashing the pores of the membrane during a backwashing process.
(FR) La présente invention concerne un procédé de réextraction d'un système de filtration à membrane comprenant au moins une membrane creuse perméable. Le procédé consiste à appliquer au perméat subsistant dans le système un gaz basse pression lorsque le processus de filtration est arrêté ou suspendu, de façon à amener du liquide permettant de traiter par réextraction les pores de la membrane pendant le processus de réextraction.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020090046966SG150091EP2063979JP2010501340US20090255873CN101511455
CA2660206NZ574640AU2007291946MYPI 20090657IN946/DELNP/2009