Serially Connected Distinct Treating Or Storage Units Patents (Class 210/195.1)
With semipermeable membrane, e.g., dialyzer, etc. (Class 210/195.2)
With sediment recycle means directly to main stream (Class 210/195.3)
  • Filtering device
    Patent number: 6177006
    Abstract: A filtering device includes a container having an inlet for introducing liquid to be treated, a screen provided in the container having an outlet for delivering out treated liquid, and flow creating means for creating, in said container, a flow of the liquid to be treated having a direction which is different from direction of a flow of the liquid to be treated into the screen.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: January 23, 2001
    Inventor: Tadayoshi Nagaoka
  • System for producing ultrapure water having a TOC density of no more than 0.5 ppb
    Patent number: 6177005
    Abstract: Ultrapure water having a reduced amount of TOC and a low electrical conductivity is produced in correspondence with a variation in water quality of raw water. A first water tank has an anaerobic organic matter treatment chamber and an aerobic organic matter treatment chamber which are communicated with each other at their bottom portions. Activated carbon bags are arranged in upper portions of both the chambers, and Bincho charcoal is stowed in the lower portion of the chambers. With this arrangement, carbon compounds and organic nitrogen compounds in the water to be treated are biologically treated by microbes, thereby reducing the TOC. Furthermore, nitrate nitrogen generated through the organic nitrogen compound treatment process is denitrified by the anaerobic microbe, thereby reducing the electrical conductivity of the water to be treated.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: January 23, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuyuki Yamasaki, Toyoichi Nasu, Takahide Miyamoto, Seiji Okamoto, Kazuyuki Sakata, Masami Sera, Atsushi Yokotani
  • High efficiency apparatus for treating nitrogen and phosphorous contained in sewage
    Patent number: 6177007
    Abstract: Disclosed herein is a high efficiency apparatus for treating nitrogen and phosphorous in sewage. The apparatus includes a sludge denitrification tank supplying sludge to an anaerobic tank.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: January 23, 2001
    Assignee: Daewoo Corporation
    Inventors: Eui Shin Lee, Yun Seok Chang, Myung Gyun Park, Yong Rok Heo, Chil Lim Park
  • Apparatus for the biological treatment of waste fluid from the coating process
    Patent number: 6168712
    Abstract: An apparatus for the biological treatment of waste fluid from the coating process is presented in the present invention. Said apparatus comprises a biological treatment vessel filled with carriers immobilizing microorganism useful for the treatment of waste fluid from the coating process, a tank in which said biological treatment vessel is set, a heating means to heat said waste fluid in said tank, a stirrer to stir said waste fluid, an aeration means to blow air into said waste fluid, a filter for filtration of said waste fluid having been treated, and a return pass to return filtrate of said waste fluid to said tank.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: January 2, 2001
    Assignees: Kenko Sangyo Co., Ltd., Issei Co., Ltd.
    Inventors: Kimito Kubo, Masaaki Hamada, Taizo Okazaki