Abstract: A rotary filtration apparatus is provided, of the type which includes a multiplicity of membrane packs arranged in a stack on a rotor frame, which facilitates replacement of membrane packs. A membrane pack assembly (16, FIG. 1) includes a multiplicity of membrane packs arranged in a stack between a pair of stack plates (70, 72), and held in compression by several tension members (80) spaced about the pack and coupled to the plates. The rotor frame (14) has top and bottom frame plates (50, 52) and a plurality of tying members (40) tying peripheral portions of the plates together. A sufficient number of the tying members are removable to leave an opening in the frame periphery that is large enough to allow the precompressed membrane stack assembly (16) to be moved radially into the rotor frame, at which time the removed tying members are replaced. The membrane packs can be stacked within a group of tying members (234, FIG. 10 ), and can be compressed by a compressor (280, FIG.

Abstract: A rotary filtration apparatus is provided, of the type which includes a multiplicity of membrane packs arranged in a stack on a rotor frame, which facilitates replacement of membrane packs. A membrane pack assembly (16, FIG. 1) includes a multiplicity of membrane packs arranged in a stack between a pair of stack plates (70, 72), and held in compression by several tension members (80) spaced about the pack and coupled to the plates. The rotor frame (14) has top and bottom frame plates (50, 52) and a plurality of tying members (40) tying peripheral portions of the plates together. A sufficient number of the tying members are removable to leave an opening in the frame periphery that is large enough to allow the precompressed membrane stack assembly (16) to be moved radially into the rotor frame, at which time the removed tying members are replaced. The membrane packs can be stacked within a group of tying members (234, FIG. 10), and can be compressed by a compressor (280, FIG.