SAE was based upon electric power consumption, rather than mechanical
energy delivered to the paddles. This more fairly represents the cost of operation,
but yields figures that are numerically lower than those normally advertised
The test basin was 8.85 m long and 4.173 m at the greatest width, oval shaped
as illustrated in Fig. 2. Spatial replicate tests were carried out with the aerators
always situated as shown. Our oxygen transfer measurements were generally in
accordance with the ASCE/ANSI 2-91 standard (1993), except only one DO probe
was used. Data were acquired at 10 s intervals, providing a high-resolution
representation of DO levels as water circulated around the testing basin.