Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes
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United States of America Patent
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May 19, 2009
Grant Date -
Jan 11, 2007
app pub date -
Sep 19, 2006
filing date -
Aug 11, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is described for withdrawing filtered permeate from a non-pressurized substrate in a reservoir through an assembly. The assembly has a plurality of hollow fiber filtering membranes disposed generally vertically between two solid bodies, an enclosure sealed to the upper solid body to define a cavity, a permeate port in communication with the cavity and the lumen of each membrane in fluid communication with the port via the cavity. A suction is applied to lumens of the membranes via the permeate port to withdraw permeate. A gas is directed to provide bubbles which contact the membranes. Feed water is added so that the membranes are immersed while applying the suction.
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