Patent ID: 6074554
Filing Date: 2000-06-13
Classification: B01F,B03D,F04D,Y10S

Abstract:
A dissolved gas floatation tank system comprising:a tank;an influent feed pipe adapted to deliver influent feed into the tank;a waste output port adapted to carry waste from the tank;an effluent output line to carry effluent from the tank;a recirculation line extending from the tank to the influent feed pipe, the recirculation line being adapted to receive effluent from the tank for transport through the recirculation line;a pump system in fluid communication with the recirculation line for dissolving gas into the effluent, the pump system including a centrifugal pump having an impeller with an eye and a volute; andsaid pump having a gas introduction port opening into a subatmospheric zone in to the pump for introducing gas directly into the pump, wherein said port opening and zone are away from the eye of the impeller.