Patent ID: 7938966
Filing Date: 2011-05-10
Classification: B01D

Abstract:
1. A filtration arrangement comprising: an aeration hood comprising an upper wall and at least one downwardly extending side wall, the at least one side wall at least partially shrouding at least one membrane module vertically positioned within a feed tank, the aeration hood comprising at least one open-ended tube distinct from any side wall of the aeration hood, the at least one open-ended tube extending downwardly from the upper wall, the aeration hood configured and arranged such that a gas fed into the aeration hood will displace feed liquid and lower a level of feed liquid in the aeration hood, each of the at least one open-ended tubes having at least one of the at least one membrane modules mounted therein, at least one of the at least one membrane modules in fluid communication with an interior of the feed tank through a lower end of the at least one open-ended tube, at least one aeration inlet in a wall of the at least one open-ended tube, and the at least one downwardly extending side wall extending to below the location of the at least one aeration inlet in the wall of the at least one open-ended tube.