Fish culturing system

Animal husbandry – Aquatic animal culturing – Fish culturing

Patent

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Details

A01K 6300

Patent

active

060654309

ABSTRACT:
A fish culturing system including a fish culture tank using opposed water flows, and including a water purification unit using only compressed air to power the system. The fish culture tank uses two opposing flows of water which enable solids to be removed continuously by a waste manifold at the base of the tank on two elongated sides, as well as at the surface of the water by a central overflow manifold. Water flow is developed by use of air diffusers located just above the waste manifolds in conjunction with the opposed water flows generated by two water returns. Waste water flows to a water purification unit having a clarifier, a biofilter, and air uplift tube system. The clarifier has a plurality of baffles in a lower sloped region that slows water velocity, allowing for settling of suspended solids. A lower screen further facilitates this settling. A middle settling region, topped by another screen, completes the settling process. An upper overflow region provided with a clarifier overflow trough skims clarified water from the surface, and passes it to the biofilter via gravity. A sparge arm directs water through a filter bed having nitrifying bacteria on to the air uplift tube system. A series of tubes connect the biofilter to the water manifolds of the culture tank. Each tube is, at its lower end, connected to an air hose. Air bubbles aerate and lift water upwards through the tube and into the water manifold leading to the culture tank.

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