Patent ID: 8431027
Filing Date: 2013-04-30
Classification: B03D,C02F

Abstract:
1. A method of operating a dissolved air flotation system for purifying influent water to promote bubble separation such that large bubbles are separated from the influent before the influent passes into a bubble chamber of the dissolved air flotation system, said method comprising: providing a dissolved air flotation system comprising: supplying influent water to the flotation tank such that it enters the down-flow channel, and supplying said influent water at the predetermined volumetric rate such that the downward velocity of the influent water within down-flow channel is lower than the lift rate of air bubbles of 10 microns or larger; injecting white water into a lower portion of the down-flow channel, and directing the white water downwardly in the down-flow channel; allowing air bubbles of 10 microns or larger to rise within the down-flow channel while influent water is flowing downwardly in the down-flow channel, and flushing air bubbles of less than 10 microns to be flushed under the zone baffle and into the bubble zone.