Application of electrical resistivity tomography method for the assessment of olive mill wastewater infiltration in storage basin site (southeastern Tunisia)

Loukil, Emna; Gargouri, Kamel; Soua, Nabil; Ouhibi, Takwa; Gargouri, Nabil Kamel; Rigane, Hafedh

doi:10.1007/s12517-021-07565-7

Cited by 4 publications

(1 citation statement)

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“…The storage of OMWW in evaporation ponds, which are authorized but unfortunately uncontrolled, remains the most adopted solution [1]. However, the assessment of the environmental effects of stored OMWW shows that it presents a potential contamination risk of natural resources: air, soil, surface water and groundwater [7,1,8,9]. Furthermore, there is a lack in studies dealing with effects of stored OMWW on geotechnical properties of sub-soils and embankments' stability in such sites.…”

Section: Introductionmentioning

confidence: 99%

The use of geomembrane as a remediation towards a sustainable OMWW landfilling: Case study of Agareb site in Sfax, Tunisia

S’habou

Salem

2023

E3S Web Conf.

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In Tunisia, olive mill wastewater (OMWW) locally named ‘margine’ constitutes a serious problem due to its huge amount, of about one million ton per year, and the high pollutant load resulting in the excessive chemical oxygen demand (COD) values and the presence of phytotoxic and antibacterial polyphenols. The most common treatment of OMWW was storage in evaporation ponds which are authorized but uncontrolled. Thus, it represents a potential contamination source of natural resources (air, soil and water) via infiltration. This study aims at a critically analysing the OMWW storage management on the site of Agareb in Sfax, Tunisia. The data relating to the OMWW production highlights that it exceeds its storage capacity due to the uncomplete OMWW evaporation. The geotechnical investigations confirmed the spread of OMWW through and below the storage basins. Furthermore, multiple slope sliding has been observed within embankments separating the OMWW storage basins. Faced with this alarming situation, the assessment of the incorporation of geomembrane is analysed in order to ensure the sustainability of OMWW landfilling. The slope stability analysis based on limit-equilibrium method (LEM) using Midas-Soil works software was investigated. The use of geomembrane can secure the slope stability and limit OMWW infiltrations in the landfill body and sub-soils in the studied site.

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