The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 1991
Filed:
Feb. 16, 1990
Minoru Tada, Yokohama, JP;
Syouji Harada, Omiya, JP;
Syuzo Koike, Urawa, JP;
Yukio Kawaguchi, Takatsuki, JP;
Tamotsu Mizuguchi, Tokyo, JP;
Hiroyoshi Emori, Tokyo, JP;
Naomichi Mori, Tokyo, JP;
Toshio Yamadera, Tokyo, JP;
Masami Hotta, Tokyo, JP;
Hiroki Nakamura, Tokyo, JP;
Tatsuo Sumino, Tokyo, JP;
Takashi Kimata, Urawa, JP;
Yuuko Fujii, Mitaka, JP;
Hitachi Plant Engineering & Construction Co., Ltd., both of, JP;
Japan Sewage Works Agency, both of, JP;
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.