Patents Assigned to Yasuhiro Yukawa
  • Patent number: 5520819
    Abstract: The present invention provides a method of removing suspended solids from wastewater, by dissolving and mixing sodium alginate and retarder in the wastewater; adding and mixing metallic salt having a valence of 2 or more, excluding magnesium salt and mercury salt, in the resultant mixture to aggregate the solids; and separating the aggregated solids and resultant clarified water from each other.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: May 28, 1996
    Assignees: Fuji Chemical Ind., Ltd., Yasuhiro Yukawa
    Inventors: Hiroyuki Asahi, Yasuhiro Yukawa