Authors: A. Elebo, O. Onyekwere, N.M. Hassan, S.O. Ottah, D.C. Bando, A.J. Tutuwa, V.U. Ugochukwu, G.C. Anigbo, I. Nuhu

Title of the article: Bioremediation of crude oil contaminated soil using blended mixtures of fish and piggery wastes as bio-stimulating agents

Year: 2022, Issue: 1, Pages: 16-30

Branch of knowledge: 1.6.21 Geoecology (by branches)

Index UDK: 332.368:504.53.062.4

DOI: 10.26730/2618-7434-2022-1-16-30

Abstract: The present study investigated the potentials of two blended organic manures (Fish and pig wastes) as biostimulating agents in restoring induced crude oil pollution in soil samples. 200g of soil sample was obtained and polluted with 10% (w/w) of Bonny crude. 30g of the blended mixture of the organic manure (fish and pig wastes) were added to the polluted soil samples. The bioremediated soil was subsequently analyzed for physicochemical properties, total Petroleum hydrocarbons (TPH), polycyclic aromatic hydrocarbons (PAH), heavy metals and endogenous oil degrading fungi populations on weekly basis for a period of five weeks. From the results obtained, bioremediation with the blended organic manure significantly improved the levels of nitrogen, P, K and organic matters when compared with the control. The concentrations of PAH and TPH were significantly reduced following treatment with the organic remediants in a time dependent manner. The results also revealed that there was a significant increase (P<0.05) in the fungal load on the amended soil sample following the five weeks treatment plan. Thus, the study suggests that a combination of fish and pig wastes could serve as an excellent biostimulating agent for the remediation of crude oil polluted soils.

Key words: hydrocarbons bioremediation organic manure pollution crude oil

Receiving date: 22.02.2022

Approval date: 23.03.2022

Publication date: 30.03.2022

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