Aeration & Oxygenation systems
Environmental & sustainable water treatment to save the planet
Aeration & Oxygenation systems Environmental & sustainable water treatment to save the planet
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Dryden Aqua fine bubble Air Diffusers
Aeration efficiency
One 3m long diffusers code 6.2.10 will pass 10 cubm/hr of air and will dissolve into the water 1 kg of oxygen per hour when the oxygen tension is around 2mg/l at a depth of 4 to 6m. As the oxygen tension drops below 2mg/l the transfer coefficient increases exponentially and an absolute maximum of 2 kg of oxygen per hour may be dissolved into the water from one diffusers and 10 cubm/hr of air. For normal operating a design purposes base the size of the aeration system on 1 kg of oxygen per diffusers code 6.2.10 and 10 cubm/hr of air. Maximum diffusers efficiency equates with approx 5 kg of oxygen per kw of energy expended
Typical Oxygen Transfer Efficiencies at Different water depths against the partial pressure of oxygen in solution
| % oxygen saturation | 1m depth | 2m depth | 3m depth | 4m depth | 6m depth | 30m depth |
| 5% | 20% | 35% | 50% | 65% | 73% | 80% |
| 10% | 15% | 20% | 40% | 55% | 65% | 75% |
| 20% | 10% | 18% | 28% | 45% | 60% | 70% |
| 30% | 8% | 15% | 20% | 30% | 50% | 65% |
| 40% | 6% | 12% | 14% | 23% | 35% | 55% |
| 60% | 4% | 7% | 8% | 15% | 20% | 45% |
| 80% | 2% | 5% | 7% | 9% | 12% | 30% |
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