Yet design of a dissolved air flotation system requires a correlation between the amount of excess gas dissolved at the elevated pressure? that is, the gas that may be released?and the amount of solids in the waste stream.1 Thus, the most important parameter for the design of a dissolved air flotation system is the air: solids ratio.
The effectiveness of a dissolved air flotation system is based on the ratio of kilograms of air used per kilograms of removed solids. This ratio varies between 0.005 and 0.09 kg air/kg solids removed. The exact value to use depends among other factors, on: The pressure of the system, typically ranging between 4 and 7 atmospheres