| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water tank apparatus for breeding planktons, which prevents suction of planktons while carrying out water filtration and circulation. Ž<P>SOLUTION: In the water tank apparatus for breeding planktons, water filtered and biologically treated by a filtration tank 20 is fed from a jet nozzle 31 adjusted to have the Coanda effect from a water tank wall surface to the water tank 10. The fed water is passed from the front of an inlet port 41 to prevent suction of jellyfishes, and causes a flow as a rotation current on the water tank wall surface to give a proper motor stimulation to floating organisms such as jellyfishes. The water supplied to the water tank 10 is sucked up together with food particles, discharges, or the like from the inlet port 41 as a potential flow by a suction mechanism, removes suspended solids in the water tank, incorporated with oxygen, returned to the filtration tank 20 and given to filtered microorganisms. When the suction mechanism is stopped during feeding, the water is returned from an upper overflow port to the filtration tank 20, a feed is not wastefully abandoned since the inlet port is isolated by a mesh and filtration, and biological treatment are continued. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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