| 摘要 |
<p>PURPOSE:To enhance oxygen absorbing efficiency, by forming an opening part sucking water to be treated to the partition wall partitioning a falling flow passage and a rising flow passage. CONSTITUTION:A cylindrical body 2 forming a falling flow passage R1 is provided in an aeration tank 1 and the upper end side opening part of the cylindrical body 2 is arranged in the vicinity of the liquid surface of the aeration tank 1 and the lower end side opening part thereof is arranged in the vicinity of the bottom part of the aeration tank 1 to form a rising flow passage R2 in the aeration tank 1. The suction side of a pipeline 4 with a pump P is connected to a suction tank 3 and the emitting side of said pipeline 4 is connected to the nozzle 5a of the ejector 5 arranged below the water surface of the aeration tank 1 to form a recirculation passage R3 for sending microorganism-containing water to be treated from the rising flow passage R2 to the falling flow passage R1 by the pipeline 4. The water to be treated passes through the opening part 6 formed between the ejector 5 and the cylindrical body 2 to be sucked to the falling flow passage R1 from the rising flow passage R2.</p> |
