Impact of Microbial Load on the Bioremediation of Crude Oil polluted Soil
Résumé
The effect of microbial load and nutrient (NPK 15:15:15) on crude oil polluted soil was investigated in this study.10% crude oil polluted soil for the samples were impacted with Aspergillus niger of concentrations 1×10 6 cfu/g, 2×10 6 cfu/g, 5×10 6 cfu/g, 1×10 7 cfu/g, 2×10 7 cfu/g respectively and NPK 15:15:15 were introduced to five samples which served as test samples, and the other as control sample.Parameters such as pH, Residual Hydrocarbon Content (RHC), Total Microbial Count (TMC) were monitored over a period of seven (7) weeks.The results obtained show an increase in pH for the samples.The Total Hydrocarbon Content (THC) decreased for all the samples.The control sample dropped from 183-27mg/kg (85% drop), sample impacted with 1×10 6 cfu/g dropped from 179-10mg/kg (94% drop), sample impacted with 2×10 6 cfu/g dropped from 181-9mg/kg (95% drop), sample impacted with 5×10 6 cfu/g dropped from 181-8mg/kg (96% drop), sample impacted with 1×10 7 cfu/g dropped from 180-6mg/kg (97% drop) and the sample impacted with 2×10 7 cfu/g dropped from 184-4mg/kg (98% drop).From the results, bioremediation strategy was found to be very effective.
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