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Flotation thickeners

Dissolved air flotation (DAF) provides thickening of sludges by encouraging the solids to float to the surface, rather than allowing them to sink to the tank base as with gravity thickening, where they can be removed by a skimmer. DAF is applied when the sludge solids are neutrally buoyant (i.e. neither sink nor float) and so cannot be readily removed by conventional settling.

Flotation thickeners related videos

Huber DAF process (HDF) Source: HUBER SE / YouTube

Huber DAF process (HDF)

A video to demonstrate the principles of the Huber dissolved air flotation plant.

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Flotation thickeners features and blogs

Schematic of intensification of AD by thermal hydrolysis, showing thickening, TH, AD and post-AD DW. Coversion of biogas be CHP engine included.
Blog

Pretty intense: the intensification of sewage sludge processes

Sludge intensification processes increase the sewage sludge solids concentration through thickening/dewatering or the biogas generation by digestion. But at what point do you stop extracting more water from the sludge or enhancing biogas production?

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