INTRODUCTON TO WATER QUALITY IN
AQUACULTUREUnit 4.1
Dissolved Oxygen/Aeration
Auburn University
Department of Fisheries and Allied Aquacultures
Types of aerators for aquaculture
Paddlewheel
Propeller – aspirator
Vertical pump
Pump sprayer
Diffused - air
Paddlewheel aerator
Propeller - aspirator
Vertical pump
Pump-sprayer aerator
Diffused air
Aerator Use
Supplemental - permanent
Emergency - mobile
How does an aerator work?
atmosphere
oxygen
oxygenatmosphere
Paddlewheel, vertical and pump sprayers
How does an aerator work?Propeller – aspirator and diffused air
atmosphere
o2o2 o2
o2 o2o2
o2
o2o2
o2
water
Advantages of aerator use
Effects of aeration
Performance of Channel catfish stocked in ponds aerated 6 h per night or ponds with emergency aeration only.
Variable Aeration 6h/night Emergency aeration
Fish stocked (no./ha) 10000 10000
Fish harvested (no./ha) 9708 9410
Harvest weight (kg/ha) 4813 3657
Ave.fish weight (g) 496 389
Feed applied (kg/ha) 6229 6229
Feed Conversion Ratio 1.32 1.75
Aerator placement in ponds
End of UnitEnd of Unit
