Patent ID: 6372140
Filing Date: 2002-04-16
Classification: B01F,C02F,Y02W

Abstract:
A method for aerating wastewater comprising the steps of:(a) introducing wastewater into an aeration tank having tank walls and a tank bottom; (b) introducing air from an external air supply through an array of coarse bubble jet diffusers into the wastewater; said coarse bubble jet diffusers oriented such that coarse bubbles emitted therefrom are directed upward along said tank walls and across a wastewater surface, converging thereon to create a downward inductive airflow stream; and (c) simultaneously introducing air from an external air supply through an array of fine bubble jet diffusers into said wastewater, each of said fine bubble jet diffusers oriented such that fine bubbles emitted therefrom are directed upward to create a counter-current air flow stream which opposes the downward inductive air flow stream.