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 Dissolved Air Flotation  (DAF)

 Floc separation by flotation means that

 the floc is forced to the water surface

 by air and then is skimmed to sewer.

 A dispersion of water mixed with air

 (as micro bubbles) is introduced into

 the flocculated water.

 The micro bubbles stick to the floc and

 force it to the water surface where it

 forms a ”foam carpet”.

 

                                                     

Considerations to optimal floc separation

 

   - flotation basin dimensions

   - water flow velocity

   - preparation of dispersion water

   - distribution of dispersion water

      

 

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