Patent ID: 8691145

Claim:
An apparatus comprising: a flow chamber with an inlet and an outlet through which is flowed a mixture of a fluid and a particulate; two or more ultrasonic transducers embedded in a wall of said flow chamber or located outside the flow chamber wall; two or more reflectors corresponding to each transducer located on the opposite wall of the flow chamber from each corresponding transducer; and device for electrochemically generating ozone; wherein if the two or more ultrasonic transducers are located outside the flow chamber wall the thickness of the flow chamber wall is tuned to maximize acoustic energy transfer into the fluid, wherein the two or more ultrasonic transducers are arranged at different distances from the inlet, wherein the ultrasonic two or more transducers are driven by an oscillating, periodic, or pulsed voltage signal of ultrasonic frequencies, wherein each transducer forms a standing acoustic wave at a different ultrasonic frequency and wherein each ultrasonic frequency is optimized for a specific range of particle sizes.