Patents by Inventor Nobuko Hashimoto

Nobuko Hashimoto 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).

  • Method of biologically removing nitrogen and system therefor
    Patent number: 6033569
    Abstract: In a method of biologically removing nitrogen and a system therefor according to the present invention, by utilizing the characteristics of AH bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the high concentration of ammonium nitrogen and the characteristics of AL bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the low concentration of the ammonium nitrogen, in the nitrifying process, operations capable of obtaining the maximum nitrifying speed in accordance with the concentration of the ammonium nitrogen can be performed, and the nitrifying reaction of nitrous acid type for producing nitrous acid as being an intermediate oxide material of the ammonium nitrogen can be performed.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: March 7, 2000
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Sumino, Nobuko Hashimoto, Hiroki Nakamura, Kazuhiko Noto, Takako Ogasawara, Masaaki Shirai, Hiroyoshi Emori, Masataka Kasai
  • Method of biologically removing nitrogen and system therefor
    Patent number: 5997736
    Abstract: In a method of biologically removing nitrogen and a system therefor according to the present invention, by utilizing the characteristics of AH bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the high concentration of ammonium nitrogen and the characteristics of AL bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the low concentration of the ammonium nitrogen, in the nitrifying process, operations capable of obtaining the maximum nitrifying speed in accordance with the concentration of the ammonium nitrogen can be performed, and the nitrifying reaction of nitrous acid type for producing nitrous acid as being an intermediate oxide material of the ammonium nitrogen can be performed.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: December 7, 1999
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Sumino, Nobuko Hashimoto, Hiroki Nakamura, Kazuhiko Noto, Takako Ogasawara, Masaaki Shirai, Hiroyoshi Emori, Masataka Kasai
  • Method and system for removing nitrogen and immobilized microorganisms
    Patent number: 5976378
    Abstract: Waste water containing ammonium nitrogen is brought into contact with either one of a catalytically acting substance for converting an ammonium oxidizing product produced by being oxidized by oxidizing bacteria for oxidizing ammonium nitrogen or converting bacteria for reproducing converting capacity of the catalytically acting substance in the aerobic condition.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: November 2, 1999
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Sumino, Nobuko Hashimoto, Kazuhiko Noto, Takako Ogasawara
  • Method of biologically removing nitrogen and system therefor
    Patent number: 5876603
    Abstract: In a method of biologically removing nitrogen and a system therefor according to the present invention, by utilizing the characteristics of AH bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the high concentration of ammonium nitrogen and the characteristics of AL bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the low concentration of the ammonium nitrogen, in the nitrifying process, operations capable of obtaining the maximum nitrifying speed in accordance with the concentration of the ammonium nitrogen can be performed, and the nitrifying reaction of nitrous acid type for producing nitrous acid as being an intermediate oxide material of the ammonium nitrogen can be performed.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: March 2, 1999
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd.
    Inventors: Tatsuo Sumino, Nobuko Hashimoto, Hiroki Nakamura, Kazuhiko Noto, Takako Ogasawara, Masaaki Shirai, Hiroyoshi Emori, Masataka Kasai
  • Method of biologically removing nitrogen and system therefor
    Patent number: 5849180
    Abstract: In a method of biologically removing nitrogen and a system therefor according to the present invention, by utilizing the characteristics of AH bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the high concentration of ammonium nitrogen and the characteristics of AL bacteria as being nitrifying bacteria of nitrous acid type for displaying high activity at the low concentration of the ammonium nitrogen, in the nitrifying process, operations capable of obtaining the maximum nitrifying speed in accordance with the concentration of the ammonium nitrogen can be performed, and the nitrifying reaction of nitrous acid type for producing nitrous acid as being an intermediate oxide material of the ammonium nitrogen can be performed.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: December 15, 1998
    Assignee: Hitachi Plant Engineering & Construction Co., Ltd
    Inventors: Tatsuo Sumino, Nobuko Hashimoto, Hiroki Nakamura, Kazuhiko Noto, Takako Ogasawara, Masaaki Shirai, Hiroyoshi Emori, Masataka Kasai