Performance testing of aerators utilised a concrete basin filled with clean water
and free from sediment oxygen demand. An oxygen scavenger chemical was
weighed and mixed into the basin until DO was below 10% of saturation. In each
experiment, the aerator was first operated at low speed as required to mix the
scavenger agent into the water column. Then aeration behaviour could be tested by
increasing speed to the level of interest and finally logging DO levels in the tank
until it surpassed 70% saturation.