AERATION TANK

摘要

PURPOSE:To form an inexpensive aeration tank excellent in earthquake resistance and simple to assemble and disassemble by forming a flexible structure not connecting an outer peripheral side wall and a central fixing stand and pressing a rubber sheet to an installation surface such as the ground and the inner surface of the outer peripheral side wall by water pressure. CONSTITUTION:An outer peripheral side wall 4 is implanted in a loop-shape concrete base 3 and a plurality of foundation piles are driven in the center part of the conical circular installation surface surrounded by the outer peripheral side wall 4 and a flat disc-shape concrete fixing stand 5 is anchored thereon. A rubber sheet 6 with thickness of about 1 mm is closely applied to the bottom surface from the fixing stand to the inner perphery of the outer peripheral side wall 4 and the inner peripheral surface of the outer peripheral side wall 4 to form a tub-shape tank body. A ring-shape concrete press plate 7 is placed on the fixing stand 5 so as to press the rubber sheet 6 and the ring- shape aeration nozzle 8 connected to an air supply pipe 9 is arranged on the press plate 7. A deodorizing oxygen supply device 11 is arranged to the central part in the tank body at the position equal to the surface of the waste water in the tank.