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1. EP2370197 - METHOD AND PLANT FOR MANAGING THE CLOGGING OF MEMBRANE MODULES AND FILTRATION MEMBRANES

Office European Patent Office
Application Number 09796820
Application Date 17.12.2009
Publication Number 2370197
Publication Date 05.10.2011
Publication Kind A1
IPC
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
02
Reverse osmosis; Hyperfiltration
12
Controlling or regulating
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14
Ultrafiltration; Microfiltration
22
Controlling or regulating
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
02
Membrane cleaning or sterilisation
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
44
by dialysis, osmosis or reverse osmosis
B01D 61/12
B01D 61/22
B01D 65/02
C02F 1/44
CPC
B01D 61/12
B01D 61/22
B01D 65/02
B01D 2311/04
B01D 2311/08
B01D 2321/02
Applicants DEGREMONT
Inventors BONNELYE VERONIQUE
FERNANDEZ LOPEZ FRANCISCO
Designated States
Priority Data 0807390 null
FR20080007390 null
IB2009055807 null
WO2009IB55807 null
0807390 23.12.2008 FR
2009055807 17.12.2009 IB
Title
(DE) VERFAHREN UND ANLAGE ZUR KONTROLLE DES VERSTOPFENS VON MEMBRANMODULEN UND FILTRATIONSMEMBRAN
(EN) METHOD AND PLANT FOR MANAGING THE CLOGGING OF MEMBRANE MODULES AND FILTRATION MEMBRANES
(FR) PROCEDE ET INSTALLATION POUR LA GESTION DU COLMATAGE DE MODULES MEMBRANAIRES ET DE MEMBRANES DE FILTRATION
Abstract
(EN)
The invention relates to a method for managing the plugging of membrane modules and of filtration membranes, in particular for nanofiltration, ultrafiltration or reverse osmosis for desalinating water, which comprises carrying out consecutive rinsing operations for controlling clogging, in particular biological clogging: evaluating the thickness of the biofilm; starting a rinsing operation at the latest when the evaluated thickness of the biofilm exceeds a first predetermined setpoint value for the biofilm thickness and stopping the rinsing operation not before the biofilm thickness has become lower than a second predetermined setpoint value lower than the first one for the biofilm thickness.

(FR)
Procédé de gestion du colmatage de modules membranaires et de membranes de filtration, plus spécialement de nanofiltration, ultrafiltration ou d'osmose inverse, pour le dessalement d'eau, selon lequel on effectue des rinçages successifs pour lutter contre le colmatage, en particulier le colmatage biologique : on effectue une évaluation de l'épaisseur du biofilm; on déclenche un rinçage au plus tard lorsque l'épaisseur évaluée du biofilm dépasse une première valeur de consigne prédéterminée pour l'épaisseur du biofilm, et on arrête le rinçage au plus tôt lorsque l'épaisseur du biofilm est devenue inférieure à une deuxième valeur de consigne prédéterminée plus faible que la première, pour l'épaisseur du biofilm.