Mitsubishi Chemical Corporation

Mitsubishi Rayon Company, Limited

Makoto Ideguchi

Nobuyasu Ueno

Yunje Lee

Satoshi Suzuki

Yoshihito Nakahara

Katsuyuki Yanone

Manabu Sasakawa

Noritaka Shibata

Shinsuke Furuno

Tetsuya Torichigai

Toshinori Tanaka

Wataru Fujii

Shinya Sueyoshi

Takanori Itonaga

Kiyoshi Hattori

Taro Tsujimura

Tetsuya Ooshiro

Noritaka Toyohashi Branch Shibata

Wataru Toyohashi Branch Fujii

Header-equipped air diffusion devices includes, in the header, an air storage unit, on its lower end including inlet(s) for water to be treated, and air supply part(s) and air sending part(s) on the air storage unit upper section. The air diffusion device's air sending part and horizontal tube are connected, air sent from the header being diffused by the air diffusion device, and air sending in the air storage unit is above the air supply part's air supply port. The air storage portion's partition portion, with a 50+mm height, partitions the upper portion into an air supply and an air feeding portion side. The partition portion forms a cylindrical portion and an upper plate portion and the air storage portion's trunk portion serves as part of the air supply portion, and an opening end on a lower end side of the partition portion serves as the air supply port.

Header-equipped air diffusion device, and membrane separation activated sludge device

A hollow fiber membrane sheet-like object in which a plurality of hollow fiber membranes is aligned in parallel with each other and fixed to each other while both end faces of each of the hollow fiber membranes in a longitudinal direction are open, wherein at least one belt-like binding portion made of an elastic body having an elongation percentage (E) stipulated by JIS K6251 of 100% or more and extending in a direction perpendicular to the longitudinal direction is formed at each of both end portions of the hollow fiber membrane sheet-like object, and the plurality of hollow fiber membranes is fixed to each other.

Hollow fiber membrane sheet-like object, method of manufacturing hollow fiber membrane sheet-like object, hollow fiber membrane sheet laminate, method of manufacturing hollow fiber membrane sheet laminate, hollow fiber membrane module and method of manufacturing hollow fiber membrane module

A siphon-type air diffusion device for intermittently performing aeration, comprising: at least two siphon-type air diffusion pipes; and an air supply member that supplies air to the siphon-type air diffusion pipes, wherein the siphon-type air diffusion pipe includes a siphon chamber which includes a first siphon chamber and a second siphon chamber on the downstream side of the first siphon chamber, a communication portion which communicates the first siphon chamber and the second siphon chamber with each other, an air diffusion hole which is provided on the downstream side of the siphon chamber, a path which extends from the siphon chamber to the air diffusion hole, and a treatment water inlet which is provided on the upstream side of the siphon chamber, wherein the air supply member includes a distribution pipe which extends in an arrangement direction of the siphon-type air diffusion pipe, and an introduction portion which is branched from the distribution pipe and includes at least one air supply port supplying air to the siphon-type air diffusion pipe, wherein the distribution pipe is provided above the air supply port, and wherein in the air supply port of the introduction portion, the air supply port located at the uppermost position in the vertical direction is provided below a lower end of a partition wall dividing the siphon chamber and the path.

Siphon-type air diffusion device, membrane bioreactor, and water treatment method

Provided is a water collection header () for collecting and extracting filtrate from a plurality of membrane modules (), comprising: a plurality of cylinder portions () each including a cylinder body () formed in a cylindrical shape in which at least one end portion is opened and formed such that the end portions are sequentially connected to each other in a water-tight state, wherein at least one cylinder portion () of the plurality of cylinder portions () includes a connection portion () connected to the membrane module () so that the filtrate flows from the membrane module (), and wherein at least one cylinder portion () of the plurality of cylinder portions () includes a water intake portion () capable of discharging the filtrate inside the cylinder body () to the outside, which is easily assembled.

Water collection header, membrane module unit, and water treatment method

The present invention relates to a method for producing a hollow fiber membrane sheet-like object including: a connecting process of forming a ring-shaped section by winding a hollow fiber membrane capable of being continuously supplied, around two or more rolls so as to surround the two or more rolls and connecting a leading end portion of the wound hollow fiber membrane and an adjacent hollow fiber membrane, or of putting a ring-shaped section created in advance, on two or more rolls, and connecting a leading end portion of a hollow fiber membrane capable of being continuously supplied, to the ring-shaped section; a winding process of winding the hollow fiber membrane around the rolls by moving the leading end portion of the hollow fiber membrane by rotating at least one roll of the two or more rolls; a fixing process of forming a fixed section by fixing the hollow fiber membrane wound around the two or more rolls, into the form of a sheet in a width direction; and a cutting process of performing cutting-out along the fixed section, thereby obtaining a sheet-like object to which end portions of the hollow fiber membranes are connected in the width direction. According to the present invention, a hollow fiber membrane sheet-like object can be produced with a simple configuration and a change in sheet length can be easily performed.

Method for producing hollow fiber membrane sheet-like object, method for producing hollow fiber membrane module, and device for producing hollow fiber membrane sheet-like object

Hollow fiber element for filtration

A hydrophilizing agent for a hydrophobic porous membrane, wherein the agent contains a surfactant, and the surfactant has a frothability such that the bubble height immediately after frothing, as measured according to the Ross-Miles method (JIS K 3362), using a 0.1 wt % aqueous solution of the surfactant at 25&#xb0; C., is 40 mm or less, and preferably has a frothability such that the bubble height five minutes after frothing is 20 mm or less; a method for hydrophilizing a hydrophobic porous membrane using this hydrophilizing agent; and a method for testing and hydrophilizing a membrane module using this hydrophilizing agent.

Hydrophilizing agent for hydrophobic porous membrane, and method for hydrophilizing hydrophobic porous membrane and test method using this agent

Growing community of inventors

Toyohashi, Japan

Makoto Ideguchi