Mitsubishi Jukogyo Kabushiki Kaisha

Yasuyuki Ogushi

Naohiko Ukawa

Kiyoshi Okazoe

Masao Hino

Susumu Okino

Taku Shimizu

Hiroshi Suzumura

Masato Kaneko

Takashi Haruki

Koosoo Tao

Kyozo Suyama

Nobuo Kojima

Masaharu Yoshimi

A process for the treatment of sewage to provide effective removal of selenium (especially the 6-valent selenium) to meet required standards for the dissolved amount of selenium, and the like, at a low cost are developed. The process and apparatus reduces selenium from the 6-valent selenium using microbiological treatment to obtain 4-valent selenium and/or simple selenium, and then provide a solid-liquid separation.

Sewage treatment process

A flue gas treatment system is provided for which is capable of easily treating Se contained in flue gas, comprising an extractor 13 for extracting soluble components in the dust removed by a dry-type dust precipitator 5 into water to slurry the dust; insolubilizer supply 16 for supplying an insolubilizer for insolubilizing at least tetravalent Se to the dust slurry which has been slurried from the dust by the extractor 13; adsorbent supply 14 for supplying an adsorbent composed of an organism material for adsorbing at least hexavalent Se in the dust slurry; and separator 15 for solid-liquid separating the dust slurry to which the insolubilizer and the adsorbent have been supplied by said supplies.

Flue gas treatment system

Growing community of inventors

Hiroshima, Japan

Yasuyuki Ogushi