| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a useful technology for easily and surely, grasping a amount of fluid transferred though a transfer pipe in a waste water disposal apparatus. SOLUTION: In a waste water treatment tank 1, the outflow side end 72a of a discharge pipe 72 of a first airlift pump is provided with an opening 73, of which the upper side is opened, thereby the surface of circulating water that circulates through the opening 73 can be checked. A horizontal part 73a is formed on the upper side open end of the opening 73. This horizontal part 73a is formed horizontally to the waterline of the circulating water that circulates through the opening 73. Therefore, by measuring the relation between the height from the pipe bottom of the discharge pipe 72 to the horizontal part 73a and the transfer amount of the circulating water beforehand, the transfer amount of the circulating water can be grasped based on the actual waterline of the circulating water with respect to the horizontal part 7.</p> |
