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ABSTRACT
Soil is a fundamental and irreplaceable natural resource which provides a variety of ecosystem services. Soil is essential for many human activities. Crude oil is a complex mixture of a large number of organic compounds that explored and refined for both domestic and industrial usage, soil contamination by crude oil and its products is an occurence that is bound to occur, this contamination always has an adverse effect on the ecosystem and hampers some human activities mainly those associated with planting and fishing, hence decontamination of soil is very essential. This study was centered on the biodegradation of crude oil in soil by the use of plant growth promoting rhizobacteria, the biodegradation method used was the ex-stu method. 40kg of soil was mixed with crude oil flowing at 10kg/hr, 20kg of microbe was introduced into this mixture, and 20kg of oxygen was utilized by the microbe to degrade the crude oil. It was observed that the rate of degradation was above 90%. The undegradeble crude oil was observed to exit the reactor in the vapor phase due to high temperature which was observed to be 727.8f, the bottoms of the reactor was observed to be composed of mainly soil and microbe, total mass of bottoms was observed to be 60kg while the tops had a mass of 25kg with water and oxygen each having 42.07% and 48.53% respectively, carbondioxide was observed to have 67.4% of that mass,
