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Browsing by Author "Mansouri, Racha"

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  • Technical and economic feasibility of fenton and photo-fenton´s oxidation for industrial wastewater treatment
    Publication . Mansouri, Racha; Martins, Ramiro; Charfi, Ichrak
    The Olive Pomace Oil Extraction Industry (OPOEI) has grown by 4% annually since 2019, highlighting its economic importance in the European Union (EU). This growth has led to the generation of significant amounts of wastewater, approximately 1 cubic meter per ton of processed olive pomace, totaling about 5.4 million cubic meters annually worldwide. The wastewater from this industry contains pollutants that pose environmental and public health risks. It is characterized by high levels of suspended solids, strong odors, high turbidity, low biodegradability, and the presence of Chemical Oxygen Demand (COD), phenolic compounds, dark color. Olive mill wastewater is complex, necessitating innovative treatment techniques beyond conventional methods. Advanced Oxidation Processes (AOP), particularly the Fenton and Photo-Fenton processes, use hydrogen peroxide (H2O2) and ferrous ions (Fe2+) at acidic pH to generate hydroxyl radicals that degrade tough organic compounds, with the Photo-Fenton process additionally using UV light. This study aimed to identify the optimal pH and concentrations of Fe2+ and H2O2 for effective organic matter removal. In the Fenton process, the impact of iron ion (0.5 to 14 g/L) and H2O2 dosage (1.5 to 20 g/L) was assessed at pH values of 2.5, 3.0, and 3.5. Optimal conditions were identified as 20 g/L H2O2 and 7 g/L Fe2+ at pH 3.5, achieving 45% COD and 82% TPC removal. For the Photo- Fenton process, the best conditions were 15 g/L H2O2 and 7 g/L Fe2+ at pH 3.5, resulting in 75% COD and 86% TPC removal. Reaction time is critical for the efficiency of these processes. The Photo-Fenton process achieved approximately 80% COD removal and 97% TPC removal in 60 minutes, while the Fenton process achieved 55% COD removal and 93% TPC removal in 40 minutes. The economic viability of these processes involves evaluating chemical costs, energy requirements, and overall efficiency for treating one cubic meter of olive pomace oil wastewater.
    2024Master thesis Open access Show more