Patents by Inventor Qigong Xu

Qigong Xu 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).

  • Engineered wetland device of continuous operation for wastewater treatment under low temperature
    Patent number: 8936725
    Abstract: Constructed wetland wastewater treatment equipment under low temperature for continuous operation which includes: three-section substrates filled in a constructed wetland, ventilation pipes being arranged in the substrates, a height of a bed of the constructed wetland being higher than a height of the substrates; a double wall being filled with an organic substance used as a barrier at periphery of the constructed wetland; a water distributing pipe disposed at a top of the three-section substrates and a water collecting pipe disposed at a bottom of the three-section substrates; and a water inlet pipe connected to an upper portion at one end of the three-section substrates and a water outlet pipe connected to a lower portion at the other end of the three-section substrates, a water outlet of the water outlet pipe being higher than the height of the bed of the constructed wetland.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: January 20, 2015
    Assignee: Chinese Research Academy of Environmental Sciences
    Inventors: Beidou Xi, Lieyu Zhang, Jixi Gao, Jinbiao Wang, Xunfeng Xia, Qigong Xu
  • ENGINEERED WETLAND DEVICE OF CONTINUOUS OPERATION FOR WASTEWATER TREATMENT UNDER LOW TEMPERATURE
    Publication number: 20130175215
    Abstract: Constructed wetland wastewater treatment equipment under low temperature for continuous operation which includes: three-section substrates filled in a constructed wetland, ventilation pipes being arranged in the substrates, a height of a bed of the constructed wetland being higher than a height of the substrates; a double wall being filled with an organic substance used as a barrier at periphery of the constructed wetland; a water distributing pipe disposed at a top of the three-section substrates and a water collecting pipe disposed at a bottom of the three-section substrates; and a water inlet pipe connected to an upper portion at one end of the three-section substrates and a water outlet pipe connected to a lower portion at the other end of the three-section substrates, a water outlet of the water outlet pipe being higher than the height of the bed of the constructed wetland.
    Type: Application
    Filed: June 7, 2012
    Publication date: July 11, 2013
    Applicant: Chinese Research Academy of Environmental Sciences
    Inventors: Beidou Xi, Lieyu Zhang, Jixi Gao, Jinbiao Wang, Xunfeng Xia, Qigong Xu