highly petroleum contaminated soil bioremediation and rehabilitation

Oil spilling happens due to many reasons and it remains oil-contaminated soils. Arvandan Oil & Gas Co. (AOGC) is an Iranian company, placed in Khuzestan province, southwest of Iran. This company like faced with oil pollution in its operational areas. This article is a report of full-scale petroleum-contaminated soil co-composting. This study explains the remediation of 1200 cubic meters of saline contaminated soil, which gathered from the polluted operational area of AOGC. The initial total petroleum hydrocarbon (TPH) of the soil was between 6.9 – 17.1% and contaminated with heavy oil. The soil was extremely repellent and the initial water repellency was between 12500-1500 S. the remediation procedure started by adding some organic waste of a local sugarcane sugar factory to the contaminated soils, in the meantime urea, sugar, and compost mix with it. After irrigation and aeration of the mixed piles of organic materials and soil for 3 months, the TPH falls to 108 mg l^-1. At the end of the remediation project, and with the permission of the authorities, the recovered soils were added to the surrounding environment.