VERTICAL TYPE AERATION TANK

摘要

PURPOSE:To provide a vertical type aeration tank which has a simple constitution and throughout supplys air to the whole region in the tank and is excellent in the efficiency for supplying oxygen to sanitary sewage and high in purification treatment capacity. CONSTITUTION:A vertical type aeration tank is constituted of both an external cylinder 1 and an internal cylinder which is concentrically erected from the bottom part 1a of the external cylinder 1 and has an inflow aperture 2a to the upper part thereof. This inflow aperture 2a of the internal cylinder 2 is positioned to the lower part of the outflow part 3 of the external cylinder 1. The fluid of the inside of the internal cylinder 1 is sucked from the bottom part or the vicinity thereof by a circulation device 10 constituted of a pump 11, a pipeline 12 and an ejector mechanism 13. This fluid is spouted to the interval of the external cylinder 1 and the internal cylinder 2 in the vicinity of the base part in a state wherein large amount of air is mixed therewith. Thereby a turning fluidization is caused in the tank. Accordingly the efficiency for dissolving oxygen into the sanitary sewage is made good. Purification treatment capacity is enhanced because distribution of bubbles is uniformed.