Patents by Inventor Toshio Yamadera

Toshio Yamadera has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System for treating waste water by nitrification
    Patent number: 5061368
    Abstract: 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.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: October 29, 1991
    Assignees: Hitachi Plant Engineering & Construction Co., Ltd., Japan Sewage Works Agency
    Inventors: Minoru Tada, Syouji Harada, Syuzo Koike, Yukio Kawaguchi, Tamotsu Mizuguchi, Hiroyoshi Emori, Naomichi Mori, Toshio Yamadera, Masami Hotta, Hiroki Nakamura, Tatsuo Sumino, Takashi Kimata, Yuuko Fujii