Membrane filter cleaning method and installation for implementing same
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United States of America Patent
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Issued Date -
Aug 16, 2007
app pub date -
Mar 1, 2005
filing date -
Mar 10, 2004
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method of cleaning membrane filters comprising hollow fibres and an inner skin. The inventive method comprises the following steps consisting in: emptying the concentrate compartment in order to release the liquid to be filtered contained therein and the suspended matter, and, subsequently, performing a backwashing step involving the passage of liquid from the permeate compartment into the concentrate compartment through membranes in order to detach and release impurities deposited thereon, while circulating a gas in the concentrate. According to the invention, backwashing liquid and/or gas pulses are produced by control means (5, 5a; 7, 7a) during at least one backwashing phase.
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