PROBLEM TO BE SOLVED: To provide an aeration apparatus which supplies a large amount of microbubble with water stream to the whole of a tank efficiently and uniformly in an aeration tank, a farming tank, and a culture tank. SOLUTION: The through-flow pump aeration apparatus composed of a through-flow pump (crossflow pump) of a cylindrical multi wing impeller shape that has a microbubble generation mechanism is set up in the aeration tank, the farming tank, and the culture tank, and a pump casing is made to swing centering a rotary shaft by a rotation transmission mechanism, thereby water stream with a microbubble is supplied to the whole of the tank, and effective aeration is done. The generation of the microbubble is obtained from a diffusion hole that is drilled in the hollow rotating shaft of the impeller and a porous material put in addition with the rotation. COPYRIGHT: (C)2012,JPO&INPIT
