Japan Sewage Works Agency

Kurita Water Industries Ltd.

Hitachi Plant Engineering Construction Co., Ltd.

Syuzo Koike

Yasuhiko Watanabe

Tadao Takeuchi

Noboru Fujiwara

Naohiro Taniguchi

Hiroki Nakamura

Tatsuo Sumino

Hiroyoshi Emori

Naomichi Mori

Yuuko Fujii

Minoru Tada

Syouji Harada

Yukio Kawaguchi

Tamotsu Mizuguchi

Masami Hotta

Toshio Yamadera

Takashi Kimata

A coagulation reaction tank comprises a cylindrical tank provided in the central part thereof with a rotary stirring mechanism furnished with stirring vanes and a filtration tank for introducing the liquid from within the cylindrical tank in the form of filtrate and discharging the filtrate out of the cylindrical tank. This coagulation reaction tank is characterized by the fact that the filtration tank provided in the bottom thereof with slits is disposed in the cylindrical tank above the stirring vanes or the cylindrical tank provided in the upper part of the wall thereof with slits and the filtration tank is disposed outside the slits.

Coagulation reaction tank

A system for treating waste water using a particulate body formed by covering and fixing nitrifying bacteria. In the system, the particulate body is inserted in a nitrifying vessel which including therein an air diffusion device for supplying oxygen to the nitrifying bacteria and a particulate body separation device for preventing the outflow of the particulate body. The nitrifying vessel and the particulate body contained therein are used as a nitrifying vessel unit and one or more such nitrifying vessel units are arranged within a treating tank. Waste water is circulated between the nitrifying vessel and the other portions of the treating tank than the nitrifying vessel by means of the air lift effect of the air diffused from the air diffusion device.

System for treating waste water by nitrification

Growing community of inventors

Urawa, Japan

Syuzo Koike