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Browsing by Author "Guesmi, Meriem"

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  • Sludge dewatering from a WTP and WWTP using a natural coagulant
    Publication . Guesmi, Meriem; Martins, Ramiro; Mokkadem, Yassin
    In the wastewater treatment process we protect our environment from eutrophication, bacterial resistance and water contamination with heavy metal... But along this treatment significant amount of sludge are generated contains organic material and nutrients that have agriculture value. For the sludge recovery it should be treated to reduce the water volume before being disposed in the land. In this process generally we use chemicals such as polymers for the sludge dewatering but these products are expensive and can damage our environment. That’s why several researches enhance the use of natural coagulants. In this context Moringa oleifera showed a good result for sludge dehydration. The Moringa oleifera powder replaces the chemical coagulant like polyaluminum and many other chemical products. The use of Moringa Oleifera can be a cheap and environmentally solution to the utilization of toxic products. But the main question is about its efficiency for the coagulation process, that’s why we try in these theses to compare the yield of chemical polymers and our natural one. The experiment, are done to evaluate the efficiency of the coagulation process by Moringa (solution and powder) also some chemical solutions, the drainage rate for different amount of coagulant in the sorption line were analysed, to compare the velocity of the sludge filtration . Also were measured the filtrate turbidity and total solids in the final cake. Drainage rate, TS and turbidity, for different coagulant dosage, were used to analyse the dewatering of a different volumes of sludge (H sludge – 10, 20 and 40 cm). The efficacy of the water dehydration was notable with Moringa extract: the TS increase average is around 9 times. Moringa showed a better action against Al2SO4 which had a good efficiency us the average of TS increase is around 7 times.
    2020Master thesis Unknown Show more