Underground Sewage Treatment Plants



"A Truly New System of Dissolved Air Flotation"

AQUA-DAF is a high rate DAF flotation unit. Unprecedented clarification and thickening efficiency is attained by the new hydro direct system combined with the unique micro-bubble screening system: a recent exclusive break-through innovation.

BENEFITS:

• High separation and sludge thickening efficiency
• High air dissolving rate (>90%)
• Reduced energy and chemicals consumption
• Low water head of the flotation
cell
• Most simplified and easy installation
• Optional fully automatic operation
• Know-how for implementing the flotation unit in the WWTP or in the production line

PRINCIPLE OF OPERATION:

Feed stream, clarified effluent and floated sludge are all conveyed through the unique multi functional central column. Both feed and clear streams follow uniform radial trajectories through different sections of the liquid volume in the cell. The feed mix, is pushed immediately to the surface due to the floating action of the air micro bubbles. Thanks to the custom-sized inlet slots, it distributes uniformly throughout the flotation area (hydro direct system).
Before reaching the exit slots, the clear bottom layer is forced to pass through a filtering micro bubblesbed provided by the high efficiency air-dissolving reactor. This unique system allows, for an equal available flotation area, separation performances superior to any other DAF units currently in the market.
A radial skimmer with a rotating double scoop removes the floated sludge continuously without perturbing the float blanket.