This paper examines an experimental study of optimal nozzle design for a dissolved air flotation system. The term optimal is in reference to field studies of bubble-floc agglomeration in an actual DAF tank. The primary mechanism of floc removal has been identified as bubble clustering. By understanding the significance of bubble clustering it was possible to design a nozzle that could be successfully operated at reduced saturation pressures while still achieving improved levels of turbidity in the post-DAF water.

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