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.【課題】 曝気槽や養殖槽および培養槽において水流と共に多量の微細気泡を槽内全体に効率良く一様に供給するエアレ－ション装置を必要とする。【解決手段】本発明の微細気泡発生機構を有する円筒状多翼羽根車形状の貫流ポンプ（クロスフロ－ポンプ）で構成される貫流ポンプエアレ－ション装置を曝気槽や養殖槽および培養槽内に設置し、ポンプケ－シングを回転伝達機構により、回転軸を中心にしてスイングさせることにより、微小気泡を伴う水流を槽内全体に供給し、効果的なエアレ－ションを行う。微小気泡の発生は羽根車の中空回転軸に穿孔した散気孔および追加で貼り付けた多孔質材から回転とともに得られる。【選択図】 図２
