Patents Assigned to City of Long Beach
  • Two stage nanofiltration seawater desalination system
    Patent number: 8366924
    Abstract: The present invention is directed to a method and apparatus for desalinating seawater utilizing a two stage seawater desalination system, a first stage including at least one high performance nanofiltration membrane to receive seawater feed pressurized by a first stage pump sufficiently and to produce a first permeate, and a second stage including at least one high performance nanofiltration membrane to receive the first permeate pressurized by a second stage pump to between about 200 psi and about 300 psi to produce potable water.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: February 5, 2013
    Assignee: City of Long Beach
    Inventor: Diem Xuan Vuong
  • Two stage nanofiltration seawater desalination system
    Patent number: 7144511
    Abstract: The present invention is directed to a method and apparatus for desalinating seawater utilizing a two stage seawater desalination system, a first stage including at least one high performance nanofiltration membrane to receive seawater feed pressurized by a first stage pump sufficiently and to produce a first permeate, and a second stage including at least one high performance nanofiltration membrane to receive the first permeate pressurized by a second stage pump to between about 200 psi and about 300 psi to produce potable water.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: December 5, 2006
    Assignee: City of Long Beach
    Inventor: Diem Xuan Vuong