Patent ID: 8440076

Claim:
A water treatment unit comprising a bath ( 2 ) delimited by a bottom wall ( 3 ) and a lateral wall ( 4 ) developing in elevation from a whole perimeter of the bottom wall ( 3 ), means for supplying ( 14 ) the water to be treated into the bath ( 2 ), at least an aeration device ( 5 ) for introducing a flow of oxygen or ozone into the water contained in the bath ( 2 ) in order to saturate the water and/or to give rise to foam, means for eliminating ( 6 ) the foam, at least an outlet section ( 13 ) of the treated water from the bath ( 2 ), said bath ( 2 ) developing prevalently horizontally and internally comprises a dividing wall ( 7 ) which divides an internal volume of the bath ( 2 ) into a turbulent water zone ( 2 a ) and a calm water zone ( 2 b ), characterized in that the bath ( 2 ) comprises internally at least a first internal wall ( 9 ) comprising a curved portion ( 11 , 11 ′) developing in elevation from the bottom wall ( 3 ) up to beyond a free surface of the water ( 8 ), wherein the first wall ( 9 ) comprises a straight portion ( 10 ), parallel to the bottom wall ( 3 ) developing continuously from the curved portion ( 11 ) and exhibiting a first end ( 10 a ) connected to the curved portion ( 11 ), wherein said unit comprises an L-shaped second wall ( 21 ), exhibiting a first tract ( 21 a ) parallel to the bottom wall ( 3 ) and a second tract ( 21 b ) continuous to the first tract ( 21 a ) and having a same development as the lateral wall ( 4 ), wherein the aeration device ( 5 ) is located in the calm water zone ( 2 b ), above the first tract ( 21 a ) of the second wall ( 21 ), such that the air flow exiting from the aeration device ( 5 ) runs parallel to the bottom wall ( 3 ) before being deviated upwards by a concavity ( 11 a ′) of the curved portion ( 11 ′) of the first wall ( 9 ).