Patents by Inventor Anthony S. Walsh

Anthony S. Walsh 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 for treating acidic waters using recycled acidic and basic sludges
    Patent number: 7758758
    Abstract: A method for removing metals from metal-containing acidic mine wastewater uses a basic sludge produced by the method for treating the wastewater. The wastewater is mixed with a lime slurry and with the basic sludge. This mixture is allowed to separate into an aqueous effluent and an acidic sludge. The effluent is mixed with the lime slurry and with a composition containing an iron compound, to produce a mixture. This mixture is allowed to separate into an aqueous effluent and the basic sludge. Lignin derivatives, such as calcium lignosulfonate, may be included in the treatment mixture.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 20, 2010
    Assignee: Noram Engineering and Constructors Ltd.
    Inventors: J. Ming Zhuang, Anthony S. Walsh
  • METHOD FOR TREATING ACIDIC WATERS USING RECYCLED ACIDIC AND BASIC SLUDGES
    Publication number: 20070205159
    Abstract: A method for removing metals from metal-containing acidic mine wastewater uses a basic sludge produced by the method for treating the wastewater. The wastewater is mixed with a lime slurry and with the basic sludge. This mixture is allowed to separate into an aqueous effluent and an acidic sludge. The effluent is mixed with the lime slurry and with a composition containing an iron compound, to produce a mixture. This mixture is allowed to separate into an aqueous effluent and the basic sludge. Lignin derivatives, such as calcium lignosulfonate, may be included in the treatment mixture.
    Type: Application
    Filed: February 28, 2007
    Publication date: September 6, 2007
    Applicant: NORAM ENGINEERING AND CONSTRUCTORS LTD.
    Inventors: J. Ming Zhuang, Anthony S. Walsh