Patents by Inventor P.Y. Chang

P.Y. Chang 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).

  • Method of sludge recycling
    Publication number: 20060027497
    Abstract: The present invention provides a method of sludge recycling by utilizing an existing facility as it is, degrading sludge efficiently and simply, and producing useful recycled water from treated water separated from the sludge, and an apparatus for sludge recycling. The present invention provides a method of sludge recycling including the steps of: bringing sludge into contact with a sludge degrading agent containing, as an active ingredient, microorganisms containing an actinomyces belonging to Streptomyces; degrading the sludge; separating the degraded sludge into a solid content and a liquid content; and producing recycled water from the liquid content.
    Type: Application
    Filed: August 16, 2005
    Publication date: February 9, 2006
    Inventors: Tsuguo Inaba, Masaki Sugino, Toshiyuki Nakazawa, Shingo Akiyama, Masahito Yamada, Chiyomitsu Kimura, Toshinori Sato, Masanori Mizuki, Yasutami Yamaura, Masaharu Asukai, Keiichi Hosokawa, Norikazu Nishizawa, Mizuo Usuba, Tatsushi Nojiri, Suzu Furuki, Tamaki Goto, Hajime Inaba, P.Y. Chang