Toray Industries, Inc.

Hideaki Ando

Yoshifumi Odaka

Seiko Kantani

Yasuharu Watanabe

Kenta Iwai

Shuji Furuno

Yohito Ito

Atsushi Kitanaka

Kenji Komori

A separation membrane element including a pair of separation membranes containing two separation membranes arranged so that the filtrate-side surfaces thereof are disposed in mutually opposed relation, and a plurality of resin members bonded to both of the mutually opposed filtrate-side surfaces, a peripheral edge of the pair of separation membranes being sealed.

Separation membrane element and separation membrane module

In a waste water treatment method using membrane separation-activated sludge, when, during filtration while supplying air using an immersion-type membrane separation unit loaded with multiple flexible membranes, the filtration differential pressure of the membranes at a set filtration flow rate exceeds a specified value Pwith respect to the filtration differential pressure Pof the initial period of operation, membrane filtration is continued with air supply stopped until the filtration differential pressure Pbecomes P&#x2265;P[kPa]. Then with the filtration flux or filtration pressure being smaller or negative compared to when filtering while supplying air, air is supplied and after the filtration differential pressure Pduring filtration reaches P&#x2264;P[kPa], filtration is returned to filtration while supplying air.

Waste water treatment method using membrane separation-activated sludge

A separation-membrane moduleincludes an element blockthat is formed by arranging, in parallel, a plurality of separation-membrane elementsthat are formed by arranging a pair of separation-membranes with their respective permeate surfaces in opposition to each other and sealing the edges of the pair of the membranes; and an aeration blockthat includes an aeration pipeand that is disposed under the element block. In the element block, at least one upper spaceris disposed in the upper portion of each space between the adjacent separation-membrane elements, and a lower spaceris disposed under the upper spacerin each space between the adjacent separation-membrane elements. And the leftmost and the rightmost separation-membrane elementsof the plurality of the separation-membrane elementsare secured to a frameat the lower spacers

Separation membrane module

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Shiga, Japan

Hideaki Ando