AERATING UNIT, AERATING APPARATUS EQUIPPED THEREWITH AND METHOD OF AERATING

摘要

An aerating unit, aerating apparatus and method of aerating that enable quick realization of a water quality with gas dissolution balance appropriate for underwater living creatures, and that can be utilized for sewage treatment in sewage treatment facilities, gas-liquid contact step in chemical plants, etc. There is disclosed a multistage aerating unit (6a) comprising an air diffuser (2) for generating bubbles in water; a liquid foam forming channel part (3) for altering the underwater bubbles to liquid foam lumps (soap-bubble-like bubble aggregate); a gas retention chamber (4) having a space capable of retaining gas in the water; and a bubble accumulating part (5) adapted to gather bubbles newly released from the lower part side of the gas retention chamber (4) and feed the bubbles to the liquid foam forming channel part (3) connected to the upper part side thereof.