Hitachi Kiden Kogyo, Ltd.

Kosuke Ode

Seiichi Tanabe

Tomoya Okamura

The objective of the present invention is to provide an aerator capable of performing aerobic operation feeding air into water, and anaerobic operation not feeding air into water efficiently, by simply switching the direction of rotation of an electric motor, without installing any lifting mechanism for lifting a rotary shaft provided with agitating blade. For that purpose, on an aerator provided with agitating blade mounted on a rotary shaft driven by an electric motor, and a cylindrical body disposed in a way to cover the area surrounding said rotary shaft, the cylindrical body is disposed from under the water surface to above the water surface, and the agitating blade is disposed by being split into upper agitating blade for sucking the waste water fed into the cylindrical body, during an aerobic operation, and lower agitating blade for feeding waste water into the cylindrical body, during an aerobic operation, and performing agitation by producing water current in the waste water, during an anaerobic operation.

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Amagasaki, Japan

Kosuke Ode