------------------------------RACEWAY AQUACULTURE------------------------------
Raceways are culture units, in which water flows continuously, making a single pass through the unit before being discharged. These systems are also referred to as flow through systems.
Details of raceways--A raceway , also
known as a flow through system is an artificial channel used
in aquaculture to culture aquatic organisms. Raceway
systems are among the methods used for inland aquaculture. A raceway
usually consists of rectangular basins or canals constructed of concrete and
equipped with an inlet and outlet. A continuous water flow-through is
provided to provide the highest level of water quality, which allows animals to
be cultured at higher densities within the raceway.Species such
as trout , catfish and tilapia are commonly
cultured in raceways. Raceways are also used for some marine species which
need a constant water flow, such as
juvenile salmon , brackish water sea
bass and sea bream and marine invertebrates such
as abalone . These systems are also referred to as flow through
systems. The residence time of water in a raceway is very short usually on the
order of a few minutes instead of hours or days in ponds.
A simple flowchart depict Raceway system
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