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1. (WO2018002685) CLEANING METHOD OF A WATER-FILTRATION SYSTEM UNDER OPERATION

Pub. No.:    WO/2018/002685    International Application No.:    PCT/IB2016/001157
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Sat Jul 02 01:59:59 CEST 2016
IPC: B01D 61/04
B01D 61/16
B01D 65/02
B01D 65/08
Applicants: TOTAL SA
VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
SAIPEM S.A.
Inventors: ANFRAY, Jérôme
PEDENAUD, Pierre
SKIVINGTON, Graeme
DELAPLACE, Thomas
Title: CLEANING METHOD OF A WATER-FILTRATION SYSTEM UNDER OPERATION
Abstract:
The present invention concerns a method for cleaning a filtration system under operation, said filtration system comprising: a hydraulic circuit Cp recycling the permeate stream to the feed side of said membrane and/or a hydraulic circuit Cr recycling the retentate stream to the feed side of said membrane, said method comprising: 1) injecting an amount of a chemical product into the filtration system which is under operation in said hydraulic circuit Cp or in said a hydraulic circuit Cr or upstream of said cross-flow filtration membrane, 2) setting the proportion of recycled permeate stream or recycled retentate stream collected in the hydraulic circuit Cp and/or Cr to enable the recycling of a significant amount of unreacted chemical product having passed through said cross-flow filtration membrane to the feed side of said cross-flow filtration membrane, as well as a filtration system for carrying out said method.