Toray Industries, Inc.

Chiyoda Corporation

Atsushi Kitanaka

Kenta Iwai

Shuji Furuno

Hiroo Takabatake

Yuji Tanaka

Masahide Taniguchi

Kazuya Sugita

Yoshifumi Odaka

Seiko Kantani

Kenji Komori

Hideaki Ando

Yasuharu Watanabe

Hiromi Satoh

Masayo Shinohara

Kazuhige Kawamura

Toshinobu Imahama

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

A method of treating wastewater containing an organic compound includes feeding wastewater to an anoxic tank, adding compounds containing nitrogen and phosphorus components to wastewater, performing anaerobic treatment on wastewater, and discharging treated wastewater as pre-treated water; introducing pre-treated water into an anaerobic treatment tank, performing anaerobic treatment on pre-treated water, thereby decomposing the organic compound into organic compounds of smaller molecular size and a mixture gas containing methane and carbon dioxide, and discharging treated water as primary water; introducing primary water into an aerobic treatment tank, performing aerobic treatment on primary water, and discharging treated water through a solid-liquid separator as secondary water; and introducing at least a part of secondary water into a reverse osmosis membrane separation unit, and separating part of secondary water into RO permeated water and RO concentrated brine, wherein at least a part of RO concentrated brine is recycled to the anoxic tank.

Method of treating a plant wastewater and treatment system therefor

A fine bubble diffusing tube that can generate fine bubbles evenly and uniformly even when the diffusing tube has a long length, a fine bubble diffusing device using such a tube and a submerged membrane separation apparatus are produced. The fine bubble diffusing tube is provided with a cylindrical supporting tube, and an elastic sheetwith fine slits formed therein, with the elastic sheetbeing placed to cover the outer circumference of the supporting tube, so that, upon supplying a gas to a space between the elastic sheetand the supporting tube, the fine slits of the elastic sheetare opened to generate fine bubbles, and the supporting tubehas a length L of 1000 mm or more in the longitudinal direction, with gas supply unitsserving as gas flow inlets being attached to the two ends of the supporting tube.

Fine bubble diffusing pipe, fine bubble diffusing apparatus, and submerged membrane separation apparatus

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Otsu, Japan

Atsushi Kitanaka