The Free On-line Aquaculture Dictionary

Aeration device efficiencies under Standard Oxygenation Test Conditions

Device kg oxygen per kW hour electricity
Fine bubble diffuser 1.2 - 2.0
Medium bubble diffuser 1.0 - 1.6
Coarse bubble diffuser 0.6 - 1.2
Surface aerator  1.2 - 2.5
Venturi aerator  1.2 - 2.5
U-tube 4.5 - 5.6
Paddlewheel 1.4 - 2.0
Gravity aerator (e.g. weirs & packed columns) 1.2 - 1.8