Filtration membrane module

A filtration membrane module submerged with a processed liquid in a processing tank comprising:

• a plurality of flat, rigid membrane cartridges vertically placed in parallel to each other as properly spaced from the adjoining membrane cartridges;
• cleaning stream generating means for supplying a flow parallel to the membrane surfaces of the membrane cartridges which opposes to gaps defined between the membrane cartridges opposite to each other;
• sucking means for sucking permeated liquid in each membrane cartridge which is in communication with the passage of permeated liquid in each membrane cartridge;
• and
• a membrane supporting plate for retaining a filtration membrane of the membrane cartridge which is made hollow using a rigid structure member;
• wherein the membrane supporting plate composing the frame structure is divided into two frame bodies made of molded resin;
• protrusions are provided on one of the opposite surfaces where the two frame bodies face to each other, while recesses are provided on the other opposite surface of the other frame body;
• the filtration membrane covers the outer surface of each frame body thereby integrally forming the filtration membrane and frame body;
• and
• the frame bodies are fixed to each other by fitting the protrusions with the recesses.

A filtration membrane module submerged with a processed liquid in a processing tank comprising:

• a plurality of flat, rigid membrane cartridges vertically placed in parallel properly spaced from the adjoining membrane cartridges;
• cleaning stream generating means for supplying a flow parallel to the membrane surfaces of the membrane cartridges which opposes to gaps defined between the membrane cartridges opposite to each other;
• and
• sucking means for sucking permeated liquid in each membrane cartridge which is communicated with the passage of permeated liquid in each membrane cartridge;
• each membrane cartridge including a membrane supporting plate and and a bag-shaped filtration membrane covering the outer surface of the membrane supporting plate;
• and
• the membrane supporting plate comprising plural bar-shaped, rigid membrane supporting frame members disposed in parallel to each other,
• a coupling frame member disposed as crossed with one end of the membrane supporting frame members to fix the same in one piece,
• passages of permeated liquid defined in gaps between the respective membrane supporting frame members, and
• a liquid collecting cap communicated with liquid collecting means and coupling the other end of each membrane supporting frame member.

A filtration membrane module submerged with a processed liquid in a processing tank comprising:

• a plurality of flat, rigid membrane cartridges vertically placed in parallel to each other as properly spaced from the adjoining membrane cartridges;
• cleaning stream generating means for supplying a flow parallel to the membrane surfaces of the membrane cartridges which opposes to gaps defined between the membrane cartridges opposite to each other;
• and
• sucking means for sucking permeated liquid in each membrane cartridge which is in communication with the passage of permeated liquid in each membrane cartridge;
• each membrane cartridge comprising:
• a pair of plate members with fine apertures or slits disposed therein being coupled to each other on the peripheries thereof so as to form a hollow membrane supporting plate;
• and
• plural flat rib members having a width bridging the two plate members, which are disposed in parallel to each other in the membrane supporting plate to form passages of permeated liquid between the respective rib members.