The phrase "aeration time" is correct and usable in written English.
It can be used in contexts related to processes that involve the introduction of air into a substance, such as in water treatment or soil management.
Example: "The aeration time for the pond should be at least two hours to ensure proper oxygen levels."
Alternatives: "oxygenation duration" or "air exposure time".
A richer concentration of oxygen allows the aeration time to be shortened from six to two hours, reducing the required tank volume.
Two numerical independent variables (retention/react time and aeration time) were selected to analyze, model and optimize the process.
The maximum COD removal was obtained for influent COD of 641 mg/L and aeration time of 4 h.
The effects of three independent variables, including HRT (6, 12, 18 h), aeration time ratio (1, 1.5, 2) and MLSS content (4000, 7000, 10000 mg/l) were investigated.
In a set of tested batches the final ammonia and nitrate concentrations were below 1 and 0.5 mg L−1, respectively, while the aeration time was shortened considerably.
Results of the gas concentration monitoring show that the trend of the OSR with aeration time based on the measurement agrees with the prediction.
The aeration times could be shortened and the energy could be saved.
Such decreases in the oxygen mass transfer coefficient, which imply longer aeration times to transfer oxygen, could represent a limiting step in biotechnological processes strongly dependent on oxygen concentration.
Results of the long-term operation of the system showed that, both reactors provided up to 85% P removal and recovery over wide ranges of aeration times (1.0 4.0 h), hydraulic retention times (HRT) (6.0 15.0 h) and temperatures (0 29.5 °C) for an extended period of 247 d, in which approximate 30% of P was recovered by the struvite accumulation devices.
Powders in Geldart's Group A de-aerate at a constant rate analogous to sedimentation in a liquid, and a standardised de-aeration time has been correlated with the powder and gas properties.
Using this model, the system performance was optimized by adjusting aeration and non-aeration time to control effluent ammonia level to preset values and at the same time to minimize energy consumption for aeration.
