CLOSED CIRCULATING CULTURE SYSTEM

PROBLEM TO BE SOLVED: To provide a closed circulating culture system capable of removing excess hypochlorous acid without using a chlorine removing apparatus such as a tank filled with active carbon or an apparatus to add a neutralizing agent. SOLUTION: The closed circulating culture system circulates seawater in a rearing water tank 1 for fish and shellfish through a circulation channel 2 while cleaning the water. The 1st electrolyzing tank 5 electrolyzing salt water between an anode 3 and a cathode 4 placed opposite to each other without using a partition membrane and generating hypochlorous acid at the side of the anode 3 is connected to the circulation channel 2. The culture system is further provided with the 2nd electrolyzing tank 11 divided by a partition membrane 6 to form an anode chamber 8 holding an anode 7 and a cathode chamber 10 holding a cathode 10, and generating hydrogen peroxide at the side of the cathode 9 by the electrolysis of salt water. The seawater passed through the 1st electrolyzing tank 5 is mixed with the salt water in the cathode chamber 10 of the 2nd electrolyzing tank 11. COPYRIGHT: (C)2005,JPO&NCIPI