Patent ID: 6382134
Filing Date: 2002-05-07
Classification: A01K

Abstract:
A fish rearing system having a water circulation system or discharging the rearing water from a discharge port provided at the bottom of a rearing water tank and resupplying the discharged rearing water to the rearing water tank, the fish rearing system is characterized in that the water circulation system comprising:a trapping device for capturing residual feed and fish feces contained in the rearing water, a residual feed detecting sensor for detecting the residual feed contained in the rearing water, a denitrification device for performing denitrification of nitrogen compound contained in the rearing water, a bubble surfacing device for generating bubbles by supplying air and/or ozone and removing surface active substances by capturing the generated bubbles, an ultraviolet disinfection device for disinfecting the circulating rearing water, an ammonium treatment device for decomposing ammonium contained in the rearing water, and an aeration device for dissolving oxygen into the rearing water, and wherein the denitrification device is disposed at the upstream of the bubble surfacing device and in a circulation path branched out from a main circulation path.