Patents Assigned to Tadashi Niimi
  • Process and apparatus for treating and purifying waste water
    Patent number: 4218318
    Abstract: Waste water can be advantageously purified, removing environmental pollution such as offensive odor and pathogens, by making the best use of processes in which in a continuous way the fluid fluctuates repeatedly in fluid-gas flow in a tank, in addition to maximum utilization of activities of useful soil organisms.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: August 19, 1980
    Assignees: Tadashi Niimi, Masaaki Niimi
    Inventors: Tadashi Niimi, Masanori Niimi, Tsutomu Arimizu