Patents by Inventor Woon-Chang Kim

Woon-Chang Kim 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).

  • Biological waste water treatment system having a sedimentation tank vertically combined with an aeration tank therein
    Patent number: 5961826
    Abstract: A waste water treatment system including an anaerobic tank for treating phosphorous contained in initial waste water, a pair of anoxic tanks for treating nitrate in the waste water from the anaerobic tank, a holding tank for containing therein the waste water from an anoxic tank, an aeration tank for treating an organic material contained in waste water from the holding tank by microorganisms and pure oxygen and for treating ammonia by microorganisms to convert the ammonia into nitrate, with the aeration tank being a substantial cylindrical body mounted on a concrete bottom provided with an inclined eccentric slope for causing the waste water to eccentrically flow within the aeration tank, having a diffuser for diffusing compressed air into the waste water in the aeration tank, and a pure oxygen generator, and with the anaerobic tank, the pair of anoxic tanks and the holding tank being mounted around the aeration tank, a sedimentation tank vertically combined with the aeration tank and communicated therewith,
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 5, 1999
    Inventor: Woon-Chang Kim