Abstract: Installation for treating water by flotation, comprising a substantially parallelepipedal assembly (1) produced by connecting modules (2, 2a), said assembly comprising a contact tank (3) which is provided with supply means for water to be treated (4) and supply means for white water (5), a flotation tank (6) which is provided with means for discharging treated water (7, 7a) and which is separated from said contact tank by a vertical wall (8), and means for discharging floated sludge, characterised in that said contact tank (3) is provided along said flotation tank (6) and delimits a single contact zone for said water to be treated with said white water, and in that said supply means for water to be treated (4) are configured to distribute the water to be treated in said contact tank according to a longitudinal water supply flow, the water distribution flow in the flotation tank being perpendicular to said water supply flow in said contact tank.

Abstract: The present invention concerns a nozzle for injecting pressurized water containing a dissolved gas, said nozzle comprising: a cylindrical intake chamber (20) for said water; a cylindrical expansion chamber (30) comprising a part (301) communicating with said intake chamber (20) by an orifice (401) and an outlet; a diffusion chamber (60) of truncated conical section communicating with the outlet of said expansion chamber (30) and widening out from said expansion chamber; said nozzle comprising means for putting the stream of water that flows out of said expansion chamber (30) into rotation.

Abstract: The present invention concerns a nozzle for injecting pressurized water containing a dissolved gas, said nozzle comprising: a cylindrical intake chamber (20) for said water; a cylindrical expansion chamber (30) comprising a part (301) communicating with said intake chamber (20) by an orifice (401) and an outlet; a diffusion chamber (60) of truncated conical section communicating with the outlet of said expansion chamber (30) and widening out from said expansion chamber; said nozzle comprising means for putting the stream of water that flows out of said expansion chamber (30) into rotation.

Abstract: The present invention relates to a hydrocyclone which includes: a body (10) defining a hollow inner recess (11), said hollow inner recess (11) having an upper portion having a cylindrical cross-section (110) extended by a lower portion having a frusto-conical cross-section (111), the diameter of said frusto-conical cross-section (111) decreasing towards the lower portion of said body (10); an intake (12) for a mixture of liquid and solids leading into said cylindrical portion (110); an underflow outlet (13), for discharging said solids essentially separated from said liquid, wherein said underflow outlet is in communication with the lower end of said inner recess (11); an overflow outlet (15), for discharging said liquid essentially separated from said solids, wherein said overflow outlet is in communication with the upper end of said inner recess (11).