Author(s)

Merzouki Hasna, Hnini Rachid^2*, Brhich Amina², Ellaite Mohammed², Hanine Hafida¹, Lekhlif Brahim³, Mandi Laila⁴, Bahi Lahoucine², Merzouki Mohammed²

¹Laboratory of Bioprocess and Biointerface, Faculty of Science and Technology, University of Sultan Moulay Slimane, Beni Mellal, Morocco.
²Laboratory of Biological Engineering, Faculty of Science and Technology, University Sultan Moulay Slimane, Beni Mellal, Morocco.
³Research Team Hydrogeology/Treatment and Treatment of Waters and Climate Change, Laboratory of Environmental Engineering, Hassania School of Public Works, Casablanca, Morocco.
⁴National 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 S^2-, 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.

Leachate Treatment, Pollutants, Biological Techniques, Physicochemical Techniques

Hasna, M. , Rachid, H. , Amina, B. , Mohammed, E. , Hafida, H. , Brahim, L. , Laila, M. , Lahoucine, B. and Mohammed, M. (2020) Study of Coagulation Process with Lime in Treatment of Landfill Leachate from Fkih Ben Salah City (Morocco). Journal of Geoscience and Environment Protection, 8, 197-211. doi: 10.4236/gep.2020.89012.