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1. CA2526340 - WATER TREATMENT METHOD AND APPARATUS USING PRETREATMENT AND MEMBRANES

Office
Canada
Application Number 2526340
Application Date 20.05.2004
Publication Number 2526340
Publication Date 02.12.2004
Publication Kind A1
IPC
C02F 1/54
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
52by flocculation or precipitation of suspended impurities
54using organic material
CPC
B01D 61/145
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
14Ultrafiltration; Microfiltration
145Ultrafiltration
B01D 61/16
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
14Ultrafiltration; Microfiltration
16Feed pretreatment
B01D 2311/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
04Specific process operations in the feed stream; Feed pretreatment
B01D 2311/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2311Details relating to membrane separation process operations and control
12Addition of chemical agents
C02F 1/444
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
444by ultrafiltration or microfiltration
C02F 1/5245
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
52by flocculation or precipitation of suspended impurities
5236using inorganic agents
5245using basic salts, e.g. of aluminium and iron
Applicants INFILCO DEGREMONT, INC.
Inventors BALLARD, P. TEMPLE
Priority Data 60/472,332 21.05.2003 US
Title
(EN) WATER TREATMENT METHOD AND APPARATUS USING PRETREATMENT AND MEMBRANES
(FR) PROCEDE ET DISPOSITIF DE TRAITEMENT DES EAUX FAISANT APPEL A UN PRETRAITEMENT AINSI QU'A DES MEMBRANES
Abstract
(EN) A method of treating liquid containing at least one contaminant including mixing precipitant chemical with the liquid to cause a precipitation reaction and produce a precipitant, introducing the precipitant and the liquid into a clarification device, mixing activated silica with the precipitant and liquid to cause a flocculation of the precipitant, separating the liquid from flocculated precipitant, and introducing the liquid into a membrane treatment device to cause a reduction of flocculated precipitant from the liquid.


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