EP 1718398 A1 20061108 - WATER FILTRATION USING IMMERSED MEMBRANES
Title (en)
WATER FILTRATION USING IMMERSED MEMBRANES
Title (de)
WASSERFILTRATION UNTER VERWENDUNG VON TAUCHMEMBRANEN
Title (fr)
FILTRATION D'EAU A L'AIDE DE MEMBRANES IMMERGEES
Publication
Application
Priority
- CA 2005000282 W 20050225
- US 54778704 P 20040227
- US 57580404 P 20040602
- CA 2482517 A 20040924
- US 96107704 A 20041012
- US 63343204 P 20041207
Abstract (en)
[origin: CA2560152A1] A process and apparatus is described for filtering water with immersed membranes. In a batch process, permeate is withdrawn while the flow of feed is reduced or stopped at the end of a permeation cycle. The water level is reduced to a level where a portion of the membranes are exposed to air befor e draining the tank. In this or another process, the level of liquid is reduce d to correspond with an area of the membrane fibers having an accumulation of solids. Aeration is provided for a period of time with the liquid at this level to dislodge at least a portion of the solids from the membranes. In these or other processes, the tank is partially drained between cycles to deconcentrate the tank, aeration is provided during backwashing and intermittently while permeating, and/or retentate is withdrawn from the tank during a portion of a permeation step.
IPC 8 full level
B01D 65/02 (2006.01); B01D 63/02 (2006.01); B01D 65/08 (2006.01)
CPC (source: EP US)
B01D 61/18 (2013.01 - EP); B01D 61/22 (2013.01 - EP); B01D 63/02 (2013.01 - EP); B01D 63/0821 (2022.08 - US); B01D 65/02 (2013.01 - EP); B01D 65/08 (2013.01 - EP); C02F 3/1273 (2013.01 - EP); B01D 2315/06 (2013.01 - EP); B01D 2321/04 (2013.01 - EP); B01D 2321/185 (2013.01 - EP); Y02W 10/10 (2015.05 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
AU 2005216578 A1 20050909; CA 2560152 A1 20050909; EP 1718398 A1 20061108; EP 1718398 A4 20070425
DOCDB simple family (application)
AU 2005216578 A 20050225; CA 2560152 A 20050225; EP 05714524 A 20050225