Study on Bio-remediation of Oil Contaminated Sand

Abstract

The consumption of oil is getting raised day to day in our country. Its availability is limited to only a few countries. So, it has to be transported from such countries to other parts of the world. Leakage of oil occurs during drilling process and transportation through pipe lines. Due to this leakage the surrounding sand or water gets contaminated. Because of this, contamination sand is getting polluted and its engineering properties are altered. This study is carried out to determine the effects of crude oil contamination on the engineering properties of sea sand and to improve the properties of oil contaminated sea sand by the process Bioremediation. The soil samples are collected from Ganagalla Peta Beach, Andhra Pradesh. The samples are then artificially contaminated using crude oil in varying percentages of 2%, 4%, 6%, 8%, 10% and 12% for 2, 7 and 14 days. Sea sand is considered for this study. The laboratory tests such as direct shear, Standard proctor and chemical analysis was carried for both contaminated and bioremediated sand. As the bioremediation improves the shear strength of the soil, it is carried out for contaminated sand by using bacteria Bacillus amyloliquefaciens as it removing hydrocarbons from the contaminated sand. The Engineering properties of bioremediated sand are compared with contaminated sand