Patents by Inventor Wendelin Benz

Wendelin Benz 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 and device for purification of effluent
    Patent number: 7892431
    Abstract: The invention relates to a method for the purification of effluent, in particular, effluent from the paper industry, comprising the following method steps: a) aerobic purification of the effluent using activated sludge in an activated sludge tank (1), b) settling of at least a part of the effluent/activated sludge mixture exiting the activated sludge tank (1) in a settling tank (2), c) separation of a part of the effluent/activated sludge mixture exiting the settling tank in a separating device (3) and d) recycling of at least a part of the activated sludge separated off in steps b) and/or c) into the activated sludge tank (1).
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: February 22, 2011
    Assignee: Papierfabrik August Koehler AG
    Inventors: Harald Kraft, Hans-Thomas Armbruster, Wendelin Benz
  • METHOD AND DEVICE FOR PURIFICATION OF EFFLUENT
    Publication number: 20090211971
    Abstract: The invention relates to a method for the purification of effluent, in particular, effluent from the paper industry, comprising the following method steps: a) aerobic purification of the effluent using activated sludge in an activated sludge tank (1), b) settling of at least a part of the effluent/activated sludge mixture exiting the activated sludge tank (1) in a settling tank (2), c) separation of a part of the effluent/activated sludge mixture exiting the settling tank in a separating device (3) and d) recycling of at least a part of the activated sludge separated off in steps b) and/or c) into the activated sludge tank (1).
    Type: Application
    Filed: May 26, 2006
    Publication date: August 27, 2009
    Inventors: Harald Kraft, Hans-Thomas Armbruster, Wendelin Benz
  • Method and device for purifying wastewaters
    Patent number: 7175764
    Abstract: The invention relates to a method for purifying wastewaters, particularly wastewaters produced in the paper industry, involving the following steps: a) aerobic clarification of the wastewater using activated sludge in an activation stage; b) carrying out, in a secondary settling tank, a subsequent clarification of a portion of the wastewater/activated sludge mixture leaving the activation stage; c) desiccating, in a desiccation unit, another portion of the wastewater/activated sludge mixture leaving the activation stage; d) returning at least a portion of the activated sludge removed in steps b) and c) into the activated sludge tank.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: February 13, 2007
    Assignee: Papierfabarik August Koehler AG
    Inventors: Harald Kraft, Hans-Thomas Armbruster, Wendelin Benz
  • Method and device for purifying wastewaters
    Publication number: 20050023216
    Abstract: The invention relates to a method for purifying wastewaters, particularly wastewaters produced in the paper industry, involving the following steps: a) aerobic clarification of the wastewater using activated sludge in an activation stage; b) carrying out, in a secondary settling tank, a subsequent clarification of a portion of the wastewater/activated sludge mixture leaving the activation stage; c) desiccating, in a desiccation unit, another portion of the wastewater/activated sludge mixture leaving the activation stage; d) returning at least a portion of the activated sludge removed in steps b) and c) into the activated sludge tank.
    Type: Application
    Filed: October 1, 2002
    Publication date: February 3, 2005
    Inventors: Harald Kraft, Hans-Thomas Armbruster, Wendelin Benz