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Aeration & Oxygenation systems

Environmental & sustainable water treatment to save the planet

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Aeration efficiency

Aeration index

Typical Oxygen Transfer Efficiencies at Different water depths against the partial pressure of oxygen in solution

% oxygen 1m depth 2m depth 3m depth 4m depth 6m depth 30m depth
5% 30% 35% 40% 45% 50% 95%
10% 25% 27% 30% 35% 40% 90%
20% 20% 22% 23% 25% 30% 85%
30% 15% 17% 18% 20% 22% 80%
40% 10% 12% 14% 17% 18% 75%
60% 6% 7% 8% 12% 15% 60%
80% 2% 3% 6% 7% 9% 45%

Under conditions of 2mg/l dissolved oxygen in a 5000 cubic metre tank we measured an oxygen transfer efficiency of 6.8kg of oxygen per kw of energy expended. The surface agitators only gave a transfer of 1.5 kg of oxygen per kw expended.