Patents by Inventor Sam Long

Sam Long 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).

  • Aeration chamber for a sewage treatment system
    Patent number: 4978445
    Abstract: An activated-sludge sewage treatment plant employs a hybrid aeration chamber comprising a primary, complete-mix section to which sewage influent and recycle sludge are introduced and treated by aeration and mixing sufficient to provide an effluent having biological oxygen demand in the range of approximately 15 to 75 parts per million, and a secondary hydraulic plug-flow section which receives the effluent. In the secondary section the effluent is treated by incrementally introducing air thereto as the same flows through the secondary section to progressively reduce the biological oxygen demand and thereby provide a final, treated effluent having a biological oxygen demand of approximately 5 parts per million.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: December 18, 1990
    Inventor: Sam Long
  • Configuration of aeration chamber for an activated-sludge sewage treatment system
    Patent number: 4938867
    Abstract: A configuration of an aeration chamber for an activated-sludge treatment plant includes an elongated, hydraulic plug-flow aeration chamber with a floor having a sloped portion and a level portion. The level portion, which acts as a collection area for the activated sludge, is adjacent the air diffusers of the aeration chamber at the point of maximum turbulence within the chamber. By using the force of gravity to assist in returning the activated sludge to the point of maximum turbulence, the aeration chamber of the present invention is able to process sewage in a more efficient manner.
    Type: Grant
    Filed: September 2, 1988
    Date of Patent: July 3, 1990
    Inventor: Sam Long
  • Activated-sludge aeration system
    Patent number: 4915829
    Abstract: An activated-sludge sewage treatment plant includes an aeration chamber having at least two aeration sections and an intermediate sludge scalper device. The sludge scalper device is positioned to receive the effluent of a primary aeration section the effluent of the sludge scalper being received by a hydraulic plug flow section. The primary aeration section may be a complete-mix basin, a hydraulic plug-flow basic or a combination of both. The secondary aeration section must include at least one hydraulic plug-flow basin. A final clarifier receives and treats the effluent from the secondary aeration section. By removing the more settleable fraction of the activated sludge from the sewage being treated, prior to the final stage of plug flow aeration, the sludge scalper avoids settling of this sludge in the final aeration chamber.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: April 10, 1990
    Inventor: Sam Long