| 摘要 |
PROBLEM TO BE SOLVED: To increase dissolved oxygen by generating a jet stream due to a Coanda effect in cultivation water such as seawater and fresh water, and mixing air into the jet stream. SOLUTION: The jet stream is generated by jetting seawater jetted from a jet nozzle 11 into a jet stream generation room 12. The seawater coming in the jet stream generation room 12 enters the jet stream generation room 12 together with air. Energy is lost by the jet stream accompanied by attachment bubble, attachment jet or the like due to Coanda effect, while air and seawater are uniformly mixed and agitated. The seawater in which the seawater and air ware uniformly mixed and agitated, increase the dissolved oxygen greatly. The jet stream going out from the jet stream generation room 12 becomes foams to float on a seawater surface together with air bubbles. At this time, the impurities are discharged from a water discharge pipe to the outside of a cultivation tank together with air bubbles.
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