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Study of Coagulation Process with Lime in Treatment of Landfill Leachate from Fkih Ben Salah City (Morocco)

Journal of Geoscience and Environment Protection 2020年第9期8卷 197-211页

作者： Merzouki Hasna Hnini Rachid Brhich Amina Ellaite Mohammed Hanine Hafida Lekhlif Brahim mandi laila Bahi Lahoucine Merzouki Mohammed Laboratory of Bioprocess and Biointerface Faculty of Science and Technology University of Sultan Moulay Slimane Beni Mellal Morocco Laboratory of Biological Engineering Faculty of Science and Technology University Sultan Moulay Slimane Beni Mellal Morocco Research Team Hydrogeology/Treatment and Treatment of Waters and Climate Change Laboratory of Environmental Engineering Hassania School of Public Works Casablanca Morocco National Center for Studies and Research on Water and Energy (CNEREE) University Cadi Ayyad Marrakech Morocco

The leachates are the seat of complex processes which give them a heterogeneous character. Their compositions vary according to several factors: nature of the waste, conditions of their deposition, climatic conditions, their durations of stay, etc. They contain important quantities of organic, mineral matters even of bacteria, which require their treatment in order to safeguard the environment. To do this, several methods are used, such as membrane techniques (reverse osmosis, nanofiltration, etc.), biological techniques (activated sludge, SBR, etc.) and physicochemical techniques (Coagulation-flocculation, adsorption on activated carbon, etc.). Among these techniques, the leachate treatment by coagulation process with the lime showed interesting reduction of the various pollutants: 92.95% of turbidity, 88.23% of suspended matter, 89.89% of COD, 90.83% of BOD5, 78.39% of Fe, 77.78% of Mo, 38.29% of Cd, 48.75% of Al, 50.24% of S2-, 20.57% of K+, 27.24% of phosphorus and 19.53% of Cl-. Based on these results, the coagulation with the lime reveals interesting because it allows to reduce at a lesser cost the pollutants present in leachates.

关键词： Leachate Treatment Pollutants Biological Techniques Physicochemical Techniques

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