High velocity cross flow dynamic membrane filter

A method of operating a high velocity cross flow dynamic membrane filtration system, the method comprising:

• feeding a fluid stream into a pressure vessel, the vessel defining a treatment chamber containing a disc membrane assembly having a first support shaft and a second support shaft, each support shaft defining a longitudinal axis about which is positioned a plurality of axially spaced membrane discs;
• distributing the fluid stream over at least a portion of the disc membrane assembly;
• discharging a first portion of the fluid stream from the vessel;
• discharging a second portion of the fluid stream from the vessel;
• and
• rotating the first support shaft and the second support shaft in a first direction,
• wherein the vessel defines a length between a first end and a second end and includes a plurality of feed ports spaced along the length and a plurality of discharge ports spaced along the length, and wherein distributing the fluid stream over at least a portion of the disc membrane assembly includes distributing the fluid stream through a feed port nearer the first end than the second end, and wherein discharging the first portion of the fluid stream from the vessel includes discharging the first portion through a discharge port nearer the second end than the first end.

A method of operating a high velocity cross flow dynamic membrane filtration system, the method comprising:

• feeding a fluid stream into a pressure vessel, the vessel defining a treatment chamber containing a disc membrane assembly having a first support shaft and a second support shaft, each support shaft defining a longitudinal axis about which is positioned a plurality of axially spaced membrane discs;
• distributing the fluid stream over at least a portion of the disc membrane assembly;
• discharging a first portion of the fluid stream from the vessel;
• and
• discharging a second portion of the fluid stream from the vessel,
• wherein the disc membrane assembly includes a frame having first and second end members and a plurality of rails extending between the first and second end members, the plurality of rails oriented generally parallel to the first and second support shafts, and wherein the vessel further includes a plurality of mounting rails affixed to a vessel interior, each mounting rail configured to receive a rail of the frame, the method further including
• ceasing the distributing and discharging steps;
• moving the disc membrane assembly out of the treatment chamber, the moving including translating each rail of the plurality of rails along an associated mounting rail of the plurality of mounting rails;
• moving another disc membrane assembly into the treatment chamber, the another disc membrane assembly having a frame with first and second end members and a plurality of rails extending between the first and second end members;
• and
• resuming the distributing and discharging steps.