Storage tanks’ olive mill wastewater management in Tunisia

Elkadri, Amel; Elfkih, Saida; Sahnoun, Houda; Abichou, Mounir

doi:10.1007/s40899-021-00593-x

Cited by 7 publications

(21 citation statements)

References 39 publications

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“…The OMWW arising from the milling process amounts to 0.5-1.4 l/kg of olives depending on the process. In Tunisia, OMWW production is approximately 950,000 m 3 per year produced from 1000,000 tons of olives, averaging 0.95 litre/kg [14]. In the Sfax region, the mean annual OMWW production is almost 200,000 m 3 (fig.…”

Section: Omww Production and Storage Capacitymentioning

confidence: 99%

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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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Section: Omww Production and Storage Capacitymentioning

confidence: 99%

“…Fig.2.The evolution of the OMWW produced in the region of Sfax and those received in the site of Agareb since its creation until 2021[14] …”

mentioning

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 fact, it contributes to the constitution of a very important processing industry, ensuring the processing of olives to obtain olive oil, the extraction of oil pomace, refining, and packaging. There are 1672 olive oil mills representing the most important activity of the olive industry in Tunisia with a milling capacity of about 71,203 tons per day [33][34][35]. Three main extraction systems currently coexist: the traditional system, the continuous system with two phases, and the continuous system with three phases.…”

Section: Introductionmentioning

confidence: 99%

Water Accounting for Food Security: Virtual Water and Water Productivity in the Case of Tunisian Olive Oil Value Chain

Elfkih,

Hadiji,

Ben Abdallah

et al. 2023

Agriculture

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To achieve food security goals, water accounting seems to be one of the most powerful tools to deal with water scarcity management. Thus, indicators, such as virtual water and water productivity, can be considered complementary rather than competing indicators to assess water demand efficiency use. Water computation is, therefore, a crucial tool to understand the overall tendency of water consumption and to assist the decision makers in their decisional process about water efficiency use in different phases of production. In this perspective, this paper aims to evaluate water use throughout the value chain of the olive oil sector, which is the first strategic agro-industrial sector in Tunisia. This evaluation will be undertaken while taking into account various crucial issues concerning the main two production phases in terms of the importance of water consumption (agriculture and processing phase). In the agriculture phase, the rainfed and irrigated modes will be compared, and in the processing phase, three different processing systems will be evaluated. Thirty surveys with farmers and nine surveys with olive oil mill owners were undertaken in the arid region of Sfax: one of the most important olive oil producers in Tunisia. The results show the importance of the theoretical framework adopted in clarifying the state of water consumption in a strategic sector, such as the Tunisian olive oil sector. In addition, the different calculated indicators highlight the importance of the application of a whole technical package and a controlled and efficient use of water to improve the economic profitability and the necessity to revise the irrigated olive growing extensions’ policies under arid conditions. In addition, in the processing phase, the continuous-two phase system is emphasized as the most relevant system in terms of water efficiency use. This system is proposed to be encouraged by policy makers in future olive mill installations.

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“…In Tunisia, the total olive oil production capacity stands at 45,000 tons per day in average (ONAGRI, 2022). According to ONAGRI, National Observatory of Agriculture, Tunisian production of olive oil is about 400,000 tons in 2020, about 350,000 tons of which are dedicated to exportation (Elkadri, et al, 2022). Olive oil is, consequently, fundamental to the country's economy.…”

Section: Introductionmentioning

confidence: 99%

“…Many researchers (Elkadri et al, 2022, Sierra et al, 2022, Kovačević et al, 2022 consider this agroindustrial waste as one of the heaviest and most di cult to manage This type of sludge is a dark viscous uid with malodors. It consists of more than 80% of water and sugar, nitrogen, organic acids, polyphenols, polyalcohols, pectines, mucilage, tannins and inorganic substances (Zghari et al, 2018, Juárez et al, 2008.…”

Section: Introductionmentioning

confidence: 99%

Optimization of sunlight photo-catalytic treatment coupled to a coagulation-flocculation process

Raissi

Fakhfakh

Hadrich

2023

Preprint

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The oleic industry is one of the most polluting in food industry sector. An easy treatment of this waste is Coagulation–flocculation. Photo-catalysis can be used as complementary treatment to improve the water quality and make it reused. We optimize this method to treat mill wastewater collected from the region of Mahdia, by varying the conditions and studying their effects. Organic pollutant were removed and the final quality of water were under the imposed norm NT 106-02.

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Storage tanks’ olive mill wastewater management in Tunisia

Cited by 7 publications

References 39 publications

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

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

Water Accounting for Food Security: Virtual Water and Water Productivity in the Case of Tunisian Olive Oil Value Chain

Optimization of sunlight photo-catalytic treatment coupled to a coagulation-flocculation process

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