| 摘要 |
PURPOSE:To achieve the optimal cultivating condition never subjected to degradation of water quality due to feeding nor to a red tide by installing a cultivation water tank constructed to circulate the sea water at the outboard in a self-propulsion vessel. CONSTITUTION:Many cultivation water tanks 13 are installed in a relatively large hull 10 (larger than 10,000t) propulsive through a screw 12 to be drived by an engine. Sea water 90 is stored in respective water tanks 13 while a light source 15 is arranged in lieu of the sun beam near the ceiling in the water tank 13. The sea water is pumped by means of a pump 20 through a pipe 17 having one end opening toward the outboard sea water and temporarily stored in a tank 18, then distributed through a piping 20 and a gate valve 21. The sea water in respective water tanks 13 is sucked upon operation of a discharge pump 25 through a gate valve 23 and a piping 22 and temporarily stored in a tank 26, then discharged through a pipe 27 to the outboard.
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