Fish rearing system

• Main Authors: Gruenberg, Daniel Edward, Morimura, Shinji, Kawaguchi, Shinichiroh, Minami, Akio
• Format: Patent
• Language: English
• Published: 07.05.2002

This invention relates to a fish rearing system having a water circulation system for circulating the rearing water in a fish rearing water tank, and, particularly to a fish rearing system capable of performing water quality control at a low cost by a rational combination of devices. A fish rearing system having a water circulation system comprising: a trapping section including a particle trap for capturing residual feed and fish feces contained in the water, a sediment trap for accumulating a sediment in a rearing tank and separating the sediment from the water, a residual feed detecting sensor interposed in a pipe communicating with the particle trap and the sediment trap and a micro-screen filter a denitrification device for denitrifying a nitrogen compound dissolved and contained in the water; a bubble surfacing device for generating bubbles by supplying air and/or ozone and removing surface active substances contained in the water by capturing the bubbles; an ultraviolet disinfection device for disinfecting the circulating rearing water; an ammonium treatment section consisting of a immersion treatment device and a non-immersion treatment device and having a function of decomposing ammonium contained in the water; and an aeration device for dissolving oxygen into the water; wherein the denitrification device is disposed at the upstream of the bubble surfacing device and includes a bypass pipe Thus, the fish rearing system capable of performing water quality control at a low cost can be obtained by a rational combination of devices.