Keywords: oily sludge, landfarming, bioremediation, biodegradation, waste management, oil waste, farming, oil industry, solid waste, hydrocarbons, soil damping, fertilisation, aeration, waste disposal
Oil waste management through large scale landfarming: a case study
The operational activities of the oil industry generate solid waste containing several classes of hydrocarbons. Landfarming enables the treatment of large amounts of oil waste through the disposal of waste in the reactive soil layer and hydrocarbon biodegradation. The aim of the present study was to evaluate oil waste management in a 1,000 m² of landfarming area. The operational method used in the current investigation was biostimulation, including soil damping, fertilisation and aeration. In addition, a control cell was evaluated. To evaluate the performance of the proposed bioprocess, the moisture, total oil organic carbon, phosphorous, nitrogen, total petroleum hydrocarbon (TPH), heterotrophic aerobic bacteria (HAB), total fungi and heterotrophic anaerobic bacteria (HNB) contents were monitored, and the pH of the landfarming area was determined. The results indicated that the THP content of the treated soil decreased by 89.6%. The HAB, total fungi and HNB content presented average values of 1.4×107, 2.6×105 CFU.g–1 and 2.2×106 Cells.g–1, respectively.