Volume 59, Issue 330, June 2023

Application of first and second order biodegradation rate kinetic model on remediation of crude oil polluted soil environment

Uku Eruni Philip¹, Sakwe Adianimovie²

¹Lecturer, Chemical Engineering, Federal University Otueke, Bayelsa State, Nigeria
²Lecturer, Chemical Engineering, Federal University Otueke, Bayelsa State, Nigeria

ABSTRACT

This research deals on the application of first and second order biodegradation rate kinetic model on remediation of crude oil polluted soil environment. Experiments were made on swampy and clay soil environment using moringa seed shell and elephant grass which was grounded into powdered form as remediants and later compared with NPK fertilizer and yeast as part of the bioremediation process. The obtained results were used to determine the maximum specific rates, dissociation constant as well as the kinetic values in terms of first and second order kinetic. The behaviour of TBC and TPH in clay soil were similar to swampy soil. In the model evaluation, the correlation coefficient values (R²) obtained from the Michalis-Menten model were higher compared to first and second order degradation rate models. Thus, the ranges of R² value obtained from the predictive models are 0.9053 to 0.9794 for first order degradation rate, 0.7904 to 0.8796 for second order degradation rate and 0.8839 to 0.9979 for Michalis-Menten Equation. Hence, the Michalis-Menten Equation predicted the residual TPH better than the first and second order degradation rate models. However, the models are capable of predicting TPHs content in soil amended with moringa seed shell in powdered form, yeast and NPK in swampy soil (moringa oleifera) and elephant grass in powdered form, yeast and NPK in swampy soil (pennisetum purpureum) during bioremediation process.

Keywords: Bioremediation, degradation, pollution, environment, model, first and second order

Discovery, 2023, 59, e71d1266

PDF

Published: June 2023