Patent ID: 6277175
Filing Date: 2001-08-21
Classification: B01D,C02F

Abstract:
A method for removing trihalomethanes (THMs) and dissolved oxygen from a liquid, comprising the steps of:supplying a liquid having THMs therein to be removed into an upper portion of an air stripping container;passing the liquid having THMs therein generally downward toward a lower portion of the air stripping container and through a first packing material disposed within the air stripping container;introducing air into the lower portion for flow generally upward toward the upper portion and generally against flow of the liquid having THMs therein whereby at least some THMs undergo a phase change from liquid to gas and are carried generally upward with the air;supplying liquid from which at least some THMs have been removed from the lower portion to an upper region of a vacuum degassing container;passing the liquid from which at least some THMs have been removed generally downward toward a lower region of the vacuum degassing container and through a second packing material disposed within the vacuum degassing container;creating a partial vacuum within the vacuum degassing container whereby at least some dissolved oxygen present within the liquid from which at least some THMs have been removed is removed as the liquid from which at least some THMs have been removed flows through the second packing material; anddispensing liquid from which at least some THMs and dissolved oxygen have been removed from the lower region of the vacuum degassing container.