Dissolved Air Flotation Unit
Flow Diagram & Description
||Conventional Circular DAF Description
also offers conventional circular DAF systems. In this system, effluent
dosed with flocculant/coagulant from flocculation tank is fed into
coagulation tube situated at the centre of DAF unit. Coagulation tube
is a vertical cylinder suspended in the centre of the tank where the
flocculated effluent enters tangentially to ensure intimate mixing
of the flocculated solids with the micro bubbles which are generated
due to depressurisation of recycled effluent (which is also fed tangentially).
||Tilted Plate Flotator
conglomerates are separated in the TPF (Tilted Plate Flotator) system.
Here, flocs are separated in the corrugated plate pack which is installed
at an inclination to create maximum surface area for separation in
minimum volume. Flow through these plate packs is maintained as laminar
thus creating ideal separation conditions. The separated conglometates
collect in the corrugated crests and subsequently moves upwards in
the pack counter current, eventually forming a compact floating layer
on the liquid surface.
The floating layer of the TPF units is continuously compacted and skimmed
by a skimmer. The treated water leaves the plate pack at the bottom end,
rises and is then discharged over an adjustable weir.