Paper Information

Journal:   ENVIRONMENTAL SCIENCES   WINTER 2006 , Volume 3 , Number 10; Page(s) 71 To 81.
 
Paper: 

BIODEGRADATION OF HEAVY CRUDE OIL IN SOIL IN A PILOT SCALE

 
 
Author(s):  MINAEI TEHRANI D., HERFATMANESH A., AZARI DEHKORDI FOROUD
 
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Abstract: 

In oil producing countries, crude oil is one of the most important pollutants of the soil and water. Spillage of crude oil into the soil can be damaging to the environment. Various microorganisms are able to use some fractions of crude oil as their sole carbon source and transform them into non-toxic compounds. In this research, the biodegradation of heavy crude oil in soil under different conditions was studied over a 12-month period in a pilot scale. Cement units with dimensions of 1x2 x0.7 meters were made and crude oil was added to the soil in a final concentration of 2% (v/w) (20000 ppm). The effect of certain nutrients such as inorganic phosphate and nitrate fertilizers, animal manure and wood shavings on the biodegradation of crude oil was studied. Our results showed that the greatest oil reduction (65%) occurred in the unit which included both the inorganic fertilizers and the wood shavings. In the unit that received animal manure, the reduction of crude oil was 60% and the unit that received only inorganic fertilizers the reduction was 55%. In the unit to which no nutrient was added the reduction was 50%. Our results suggest that the addition of both wood shavings and chemical fertilizer or the addition of animal manure can increase the biodegradation of crude oil in soil. Biodegradation, Crude oil, Microorganisms, Nutrients, Soil.

 
Keyword(s): BIODEGRADATION, CRUDE OIL, MICROORGANISMS, NUTRIENTS, SOIL
 
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