Aeration method, aeration apparatus and aeration system

C - Chemistry – Metallurgy – 02 – F

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C02F 3/20 (2006.01)

Patent

CA 2611719

Provided are an aeration method, an aeration apparatus and an aeration system which allow, in a sewage disposal plant, a nursery for fish and shellfish and a closed water area in an ocean or the like, the highly efficient dissolution of an gas into the water to be treated and the transfer of the resultant treated water to another place by a water head difference by the use of a conventional apparatus for supplying a gas. An aeration apparatus, which comprises an gas spraying section (22) for generating gas bubble particles in the water to be treated (1W), a bubble rise section (3P) for allowing a mass of the gas bubble particles generated above to move upwards, a passage section (4P) for the rise of gas bubble particles, wherein the above gas bubble particles are pushed up to a position above a water surface and are changed into liquid bubbles, to thereby convert the water to be treated (1W) to a liquid film, and a liquid bubble transfer section (5P) wherein the treated water (2W) can be transferred by a water head difference.

Sont ici fournis une méthode d~aération, un appareil d~aération et un système d~aération qui permettent, dans le cadre d~une usine de retraitement des eaux usagées, d~une ferme aquacole et/ou d~une pisciculture, et d~une zone enclose maritime, océane ou de même type, une dissolution très efficace d~un gaz dans l~eau à traiter et le transfert de cette eau ainsi traitée dans un autre lieu par modification des niveaux d~eau, avec l~usage d~un appareil de type conventionnel pour l~apport en gaz. L~appareil d~aération comprend une zone de pulvérisation du gaz (22) destinée à produire des particules de gaz effervescentes dans l~eau à traiter (1W), une zone d~aspiration des bulles (3P) permettant à un volume de ces particules de gaz effervescentes produites à un niveau inférieur de s~élever, une voie de passage (4P) destinée au transport des particules de gaz effervescentes dans laquelle elles sont propulsées au-dessus de la surface de l~eau et transformées en bulles liquides, afin de convertir l~eau à traiter (1W) en film liquide, et enfin une section de transfert des bulles liquides (5P) par laquelle l~eau à traiter (2W) peut être transférée grâce à une modification des niveaux d~eau.

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