| 摘要 |
PROBLEM TO BE SOLVED: To reduce frequency of cleaning a monitor water tank in a water monitoring apparatus using fishes. SOLUTION: Water passing holes 7a are provided to a partition wall 7 for partitioning the water introducing tank 3 and swimming tank 4 of the monitor water tank 1, the bottom of the swimming tank 4 and the upper part of the water introducing tank 3 are connected through a precipitation tank 9 by return piping 10 and an air lift pump 11 for blowing air in the return piping 10 to send inspected water to the upper part of the water introducing tank 3 from the bottom of the swimming tank 4 is provided to allow the inspected water in the water introducing tank 3 to flow into the swimming tank 4 through the water passing holes 7a of the partition wall 7 by the water level difference between the water introducing tank 3 and the swimming tank 4 to thereby produce water streams in the swimming tank 4. In this constitution, the air lift pump 11 having the trouble of not getting out of order by the effect of the turbidity component of the inspected water is used as a device for producing water streams in the swimming tank 4, thereby reducing the frequency of cleaning the monitor water tank 1. COPYRIGHT: (C)2011,JPO&INPIT
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