| 摘要 |
<p>PURPOSE:To enable the discharge of treated water appropriate for a batch system by providing a treating vessel equipped with a circulating water passage on the succeeding stage side of an aerobic vessel having the discharge mechanism of specified structure and connecting the discharge pipe of the discharge mechanism to the circulating water passage. CONSTITUTION:The discharge mechanism 4 consists of a buoyancy body 41 floated on the liq. surface of the aerobic vessel A, a flexible pipe 43 provided with a water suction port and with the one end side attached to the buoyancy body 41, and drain valves 46 and 47 furnished through a filter part 42 and a drain pipe 45. And ejector pump P2 is furnished to the circulating water passage 5 opening to the inside of a treating vessel B and gaseous ozone is injected into the pump P2 from a gaseous ozone generating part 6. Furthermore, a top wall part 8 is provided at the top part of the treating vessel to form a hermetic space 81 between the liq. surface of the treating vessel B and the wall part, and a gaseous ozone treating part 9 is furnished to the exhaust passage 82 of the top wall part. A communicating passage 7 for discharging the ozone-treated water extending from the upper part of the treating vessel to the atmosphere is formed, and the drain pipe 45 of the discharge mechanism 4 is connected to the circulating water passage 5.</p> |
