Aeration method, its apparatus and its system

Abstract

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.

Description

technical field [0001] The present invention relates to an aeration method, an aeration device and an aeration system for efficiently contacting liquids stored in sewage treatment plants or reservoirs with gases such as air and pure oxygen, and further relates to the following aeration devices and aeration systems, That is, by using the pressurized gas generated by an air pump or blower, the water stored in lakes, fish farms, animal and plant cell culture tanks, sewage treatment tanks, etc. is temporarily formed into vacuole groups (foamy clusters), thereby The water storage is formed as the surface liquid film of the bubble, so that the gas (oxygen or air, etc.) in the bubble can be efficiently contacted with the water body (surface liquid film), so that in the case of using air, not only the water body can be enriched The role of oxygen can also achieve the dissolved balance of oxygen and nitrogen, and obtain water suitable for biological survival. Background technique ...

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Problems solved by technology

[0005] However, in the inventions disclosed in Patent Documents 1 and 2, the principle used is only to increase the contact area of ​​the air bubbles and the water body, and these two basic gas dissolution methods of increasing the contact time of the air bubbles and the water body. Therefore, the gas The efficiency of dissolution is very poor, and the water body that has been aerated and the water body that has not been aerated cannot be separated. In the above two methods, there is a process of secondary aeration of the water body that has been aerated, resulting in Unnecessary energy consumption, not very efficient

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