Patents by Inventor Agustin H. Arrau

Agustin H. Arrau 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).

  • Co-composting process and apparatus for treating solid waste and sewage sludge
    Patent number: 5534437
    Abstract: A method for converting municipal solid waste and sewage sludge into an organic fertilizer has a Stage 1 and a Stage 2, and includes a vessel that has three climate zones. Stage 1 has three climate zones, wherein the first climate zone contains thermophilic microorganisms, the second climate zone contains mesophilic microorganisms, and the third climate zone contains other microorganisms. The product of Stage 1 is reintroduced into Stage 2 and is then inoculated with a biodegrading enzyme and a bacteria species to produce a different final product fertilizer from Stage 2.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: July 9, 1996
    Assignee: Bio-Waste Technologies, International, Ltd.
    Inventor: Agustin H. Arrau