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Dissolved air generation for DAF

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bobharland

Industrial
Joined
May 18, 2002
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1
Location
AU
There are basically 3 methods of producing dissolved air in water for DAF cells (Dissolved Air Flotation for removal of material) :-

1 Sparger/inductor system

2 Air injection prior to a positive displacement pump (helical rotor pump)

3 Spray into a high pressure chamber with approximately 1/3 fill to give the maximum surface area for contact with the air(450/550 kPa) in the chamber.

Which system has proven to be the most reliable and cost effective based investigation and experience?

We have gone down the Sparger/inductor path passing the liquid from the inductor through a pressurised dwell chamber.

Also what little "tricks" can be used to improve the efficiency of either of the 3 systems?
 
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