Work

Leachate Interaction with Compacted Bioremediated and Bioclogged Crude Oil Contaminated Soil

Year: 2026

Type: article

Abstract: The amount of oil spillage in oil producing countries is significant and needs to be addressed. The utilization of microbes in remediation and the improvement of geotechnical properties of soil using microbial induced calcite precipitation techniques has recently gained prominence. This paper aims to investigate long term permeability. The specific objectives include (I) determination of the hydraulic conductivity of the soil, and (Ii) determination of the optimum bacteria concentration required for bioclogging. An experiment was conducted on the soil in stages. Stage 1 focused on the remediation using liquid nutrient extracted from chicken manure ( CM) at varying percentages up to 40 %. Stage 2 involved the compaction of a mixture of the Bacillus lichenifirmis suspension (1.5×10^8, 6.0×10^8, 1.2×29^9, 1.8×10^9, 2.4×10^9 cell/ml) and bioremediated soil. The cementation reagent was allowed to flow by gravity. Water and leachate permeants were applied for 21 and 70 days, respectively. The results indicated that the total petroleum hydrocarbon concentrations and hydraulic conductivity decreased from 98g/kg to 10g/ kg at 30% CM, and from 2.02×10^-9 to 1.97×20^-11 m/s at 2.4×20^9 cell,/ml, respectively. This indicates that the decontaminated soil has the potential to be used as liner material.

Source: Faculty of Engineering and Technology International Conference

DOI: 10.63748/feticon2026.v4i1cmt001

Authors: Alhassan, Musa, Abubakar , Philip

Institution: Nasarawa State University

Language: English

Topic: Microbial Applications in Construction Materials

Subfield: Environmental Engineering

Field: Environmental Science

Domain: Physical Sciences

SDGs: Life on land, Clean water and sanitation

Open Access status: diamond

Funder: Tertiary Education Trust Fund