Abstract
This paper describes fundamental characteristics of bioremediation for the purpose of in-situ remediation of oil-contaminated soil. The decomposition characteristic for the every oil was examined. It was confirmed that decomposition rate of heavy oil might be higher than that of lubricant. It is guessed that the lubricant contained an antiseptic etc. and consisted of substances with more carbon than heavy oil. Moreover, the oil decomposition characteristic for the every soil was examined. It was confirmed that kuroboku soil might have higher remediation potential than loam and sand. It is guessed that more microorganisms are contained in the kuroboku soil than loam and sand.
