Abstract: An agitator tank, used in industrial processing, that includes a tank having a substantially cylindrical interior chamber operable for containment of a material to be processed, two sets of counter-rotating blades disposed within the interior chamber of the tank and mounted on concentric axes, motor drives for each set of blades and, preferably, a turbine disposed in the base of the tank for resuspending settled material for processing. The two sets of blades include a first set of central blades which rotate counterclockwise; and a second set of peripheral blades mounted on a cylindrical frame which rotates clockwise, both sets of blades being mounted on separate, independent axes that are both centered on a single geometric axis of the cylindrical interior chamber of the tank.