Patent ID: 7105092

Claim:
A method for the treatment of waste water from an activated sludge process which comprises: a. admixing waste water from an activated sludge process or clean water with 50 volume % or less of reactive gas consisting essentially of oxygen or a mixed gas consisting essentially of oxygen and ozone to form an aqueous medium, b. subjecting said aqueous medium in an in-line atomizer to a pressure of about 0.981 to 5.394 MPa to generate cavitation and ultrasonic waves of 20 to 12,000 kHz, whereby O/OH radical molecules/atoms are formed, so that the reactive gas is dissolved to the limit and the remainder, if any, of the reactive gas is dispersed and mixed bubbles of 1 nm to 30,000 nm diameter, forming a reactive gas-dissolved/dispersed liquid and c. introducing the reactive gas-dissolved/dispersed liquid into the waste water being treated.