ABSTRACT

The Superfund site near Morgan Park, Minnesota has been severely contaminated by cutting oils (6.47 wt %) and small concentrations of polynuclear aromatic hydrocarbons (PAHs). In-situ bioremediation studies were carried out on a composite sediment sample using a series of continuous flowthrough columns to study the treatability at high and low oxygen additions (i.e., air or pure oxygen sparging). It was shown that the masses of oil and PAHs were removed at a significantly larger rate using high oxygen addition. The removal of oil and PAHs using high oxygen addition was 30.6% and 41.6%, respectively.