
ABSTRACT The rate of Total Petroleum Hydrocarbon (TPH) degradation in soil amended with mash food wastes (MFW) and fish wastes (FW) was investigated in this study. Experimental analysis was performed for a period of 56 days, while samples were collected weekly for analysis. The first and second order kinetic models were applied to study the TPH degradation rate. The result revealed that the rate of TPH removed from the control sample was low compared to samples amended by MFW and FW. Over 90% of TPH was removed from the amended samples, while only about 48% was removed from sample under natural attenuation. Analysis of the 1st and 2nd order kinetic models showed high correlation coefficient, but the rate of TPH degradation was better interpreted by the second order kinetics. The 1st order degradation rate constant were recorded as 0.0422day-1 and 0.0430day-1 for soil amended by MFW and FW respectively, while in the 2nd order, the degradation rate constant were as 1.0 x 10-5 kg.mg-1.day-1. The rate of TPH degradation increased rapidly within the first 14 days to 237.961mg.kg-1.day-1 and 292.486mg.kg-1.day-1 in soil amended by MFW, while in soil amended by FW, it increased to 225.386mg.kg-1.day-1 and 262.390mg.kg-1.day-1 for the 1st and 2nd order models respectively. However, the rate of TPH also decreased sharply after attaining maximum rate. Conclusively, food and fish wastes are recommended for treatment of hydrocarbon polluted soil as they increase TPH degradation rate. Also, the models could be useful, especially during the design stage of a bioremediation process to predict the rate of TPH degradation and time to achieve the bioremediation.
Crude Oil, Food and Fish wastes, Bio-kinetics, TPH Degradation Rate
Crude Oil, Food and Fish wastes, Bio-kinetics, TPH Degradation Rate
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