Abstract
Petroleum refineries historically have generated large quantities of acidic oil sludge, a waste product from the production of fine lubricating oils. The refining process included adding sulfuric acid to crude oil to remove impurities. The waste product that remained behind after filtration was customarily disposed of in open lagoons. The physical and chemical characteristics of this sludge vary from lagoon to lagoon and with depth. The material ranges from a solid, charcoal-like material at the bottom of the lagoons to a liquid mixture of sulfuric acid and rainwater at the surface. The sludge utilized for this study varied in pH from less than two to six and has an average loss on ignition of 78.2%. Results are presented from almost 200 separate stabilization tests.
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