Method and installation for in situ testing of membrane integrity
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United States of America Patent
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-
May 8, 2001
Grant Date -
N/A
app pub date -
Jul 19, 1999
filing date -
May 28, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is described for testing the integrity of liquid filtration membranes without the use of pressurized air. The process includes draining the upstream compartment 3 and filling it with air by venting it to the atmosphere; applying a partial vacuum to the permeate compartment 4 to create a pressure difference across the membrane 2; and measuring the liquid flow out of the permeate chamber that corresponds to air passing through the leak orifices in the membrane. After stabilization of the pressure in the permeate chamber, the resulting constant liquid flow rate out of the permeate chamber is then used to evaluate the integrity of the membrane. An installation for implementing the process is also described and can include a plurality of filtration modules.
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