Patent ID: 6878288

Claim:
A system for removing dissolved and suspended solids from a fluid stream, the system comprising: a) an elongated substantially tubular processing chamber having a longitudinal axis, the tubular processing chamber having a sidewall having an inside and an outside, a top and a bottom, a fluid inlet and a fluid outlet adapted to establish a fluid flow through the tubular processing chamber; b) a concentrate passageway having a top and a bottom and comprising an enclosure sealingly positioned to enclose at least a portion of the outside of the tubular processing chamber and define a concentrate passageway around at least a portion of the outside of the tubular processing chamber and having a concentrate fluid outlet; c) an ultrasonic transducer positioned at one end of the tubular processing chamber to supply ultrasonic wave energy to the chamber to maintain a longitudinal standing wave in the tubular processing chamber; d) a reflector positioned at an opposite end of the tubular processing chamber from the transducer and at a longitudinal spacing from the transducer equal to an even number of one half wavelengths of the standing wave, the transducer and reflector being positioned to maintain the longitudinal standing wave in the tubular processing chamber; and, e) at least one port positioned through the sidewall of the tubular processing chamber near an anti-node of the standing wave and in fluid communication with the concentrate passageway.