Biosurfactant Addition into Solvent Extraction Process of Oily Contaminated Solid Waste

Solvent extraction has been used in industry or many purposes for years, including to recover oil at contaminated soil. Certain solvents and temperature ranges have been chosen to increase the oil recovery rate of extraction process. The Study observed the implementation of biosurfactant at the extraction process to perform reduction of total petroleum hydrocarbon (TPH) concentration of oily contaminated soil. In order to optimize TPH removal, extraction were conducted for multiple stages. Biosurfactant extraction result were also compared to solvent extraction process which acetone and toluene have been selected to extract oil content from contaminated soil by using solvent extraction process. The combination treatments with biosurfactant were also involving variety of centrifugation process with 1000 rpm (1570 g) operational speed. Duration of treatment process was 10 minutes with some variations of solid to solvent ratio. During the experiments comparison result between varies treatment process provides alternatives to treat oily contaminated soil by using extraction process. Compatibility among solvents, biosurfactants, types of oily contaminated solid waste were also observed to seek possibility on large scale of treatment process implementation both insitu at the contaminated site and exsitu at integrated waste treatment facility.