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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Sep 16, 2003
Grant Date -
Jul 24, 2003
app pub date -
May 4, 2001
filing date -
Aug 11, 1995
priority date (Note) -
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Abstract
An apparatus for treating a multi component liquid substrate while leaving particulate matter therein as a skein of hollow fiber filtering membranes immersed in the substrate which is contained in a non-pressurized reservoir. A pumping fluid communication with the lumens of the membranes draws a component of the substrate as permeate through the membranes by applying a section to the lumens of the membranes. In various embodiments, an aeration system as a gas distributor for discharging air directly into the substrate within the skein, upper and lower headers of the skein are spaced apart by a gas tube, and a gas distribution system has through passages through the lower header to discharge bubbles into the substrate above the lower header.
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