The rate of oxygen transfer for a surface aerator is specified by the manufacturer as Ib/hp • hr at standard conditions. Calculate the actual rate of transfer for a 40-hp aerator in a lagoon using a beta coefficient - 0.8, alpha, coefficient = 0.9, and residual oxygen concentration = 2.0 mg/l al wastewater temperatures of 25°C and 15°C. If the efficiency of the electric drive motor is 90%. What is the electric power usage for the 40-hp aerator?
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