ABSTRACT
This chapter evaluates dirty oxygen transfer parameters for both jet and fine bubble dome aeration systems for a variety of industrial wastewaters. Most aeration system performance evaluations have been reported utilizing clean water oxygenation tests. The oxygen transfer mechanism in wastewater treatment is usually described by the two-film theory of mass transfer of oxygen from the gas phase to the liquid phase. In the study a jet aeration and fine bubble dome system is used to measure oxygen transfer parameters for different industrial wastewaters. The fine bubble dome diffuser is essentially a circular disc with a downward-turned edge. Specifically, clean and dirty water non-steady state oxygenation tests were conducted using the fore mentioned aeration systems in tanks with similar geometric configurations. Comparing the oxygen transfer rates in terms of lb per hr, dirty water oxygen transfer showed that the jet system transferred as much as 5 times the amount of oxygen as did the dome system.
