Patents by Inventor Ai ISHIKAWA

Ai ISHIKAWA 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).

  • Microorganism immobilized carrier
    Patent number: 11518698
    Abstract: [Problem] A microorganism immobilized carrier is provided that is easy for microorganisms to adhere to, and is able to reduce the manufacturing cost of the microorganism immobilized carrier and the running cost of an apparatus that uses the microorganism immobilized carrier. [Solution] A microorganism immobilized carrier is characterized by including a carbon component and a resin, having a zeta potential of from ?25 mV to 0 mV, and containing microorganisms adhered to a surface thereof and/or an interior thereof. The microorganisms are preferably nitrifying bacteria. The carbon component preferably has a particle size of from 1 ?m to 1000 ?m.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: December 6, 2022
    Assignee: TOYO TANSO CO., LTD.
    Inventors: Masashi Zenki, Tetsuro Tojo, Masatoshi Takeshita, Tomoya Nakazono, Ai Ishikawa
  • Carrier for retaining anammox bacteria for use in wastewater treatment, anammox bacteria-adhered particle, and wastewater treatment apparatus using the carrier
    Patent number: 11427489
    Abstract: [Problem] A carrier for retaining anammox bacteria, an anammox bacteria-adhered particle, and a wastewater treatment apparatus are provided that can remarkably reduce the start-up period for obtaining a nitrogen removal speed of 1 kg-N/m3/day. [Solution] A carrier for retaining anammox bacteria includes carbon particles. The carbon particles are desirably graphite particles, particularly isotropic graphite particles. The carbon particles desirably have a zeta potential of ?35 mV to 0 mV and an average particle size of 2 ?m to 1000 ?m.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: August 30, 2022
    Assignees: TOYO UNIVERSITY, TOYO TANSO CO.. LTD.
    Inventors: Tatsuo Sumino, Satoshi Sakuma, Tetsuro Tojo, Ai Ishikawa, Tomoya Nakazono, Masatoshi Takeshita
  • MICROORGANISM IMMOBILIZED CARRIER
    Publication number: 20210171373
    Abstract: [Problem] A microorganism immobilized carrier is provided that is easy for microorganisms to adhere to, and is able to reduce the manufacturing cost of the microorganism immobilized carrier and the running cost of an apparatus that uses the microorganism immobilized carrier. [Solution] A microorganism immobilized carrier is characterized by including a carbon component and a resin, having a zeta potential of from ?25 mV to 0 mV, and containing microorganisms adhered to a surface thereof and/or an interior thereof. The microorganisms are preferably nitrifying bacteria. The carbon component preferably has a particle size of from 1 ?m to 1000 ?m.
    Type: Application
    Filed: December 13, 2018
    Publication date: June 10, 2021
    Inventors: Masashi ZENKI, Tetsuro TOJO, Masatoshi TAKESHITA, Tomoya NAKAZONO, Ai ISHIKAWA
  • CARRIER FOR RETAINING ANAMMOX BACTERIA FOR USE IN WASTEWATER TREATMENT, ANAMMOX BACTERIA-ADHERED PARTICLE, AND WASTEWATER TREATMENT APPARATUS USING THE CARRIER
    Publication number: 20210087091
    Abstract: [Problem] A carrier for retaining anammox bacteria, an anammox bacteria-adhered particle, and a wastewater treatment apparatus are provided that can remarkably reduce the start-up period for obtaining a nitrogen removal speed of 1 kg-N/m3/day. [Solution] A carrier for retaining anammox bacteria includes carbon particles. The carbon particles are desirably graphite particles, particularly isotropic graphite particles. The carbon particles desirably have a zeta potential of ?35 mV to 0 mV and an average particle size of 2 ?m to 1000 ?m.
    Type: Application
    Filed: December 13, 2018
    Publication date: March 25, 2021
    Inventors: Tatsuo SUMINO, Satoshi SAKUMA, Tetsuro TOJO, Ai ISHIKAWA, Tomoya NAKAZONO, Masatoshi TAKESHITA