摘要
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<sup>2<span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"="">-</span></sup>, 20.57% of K<sup>+</sup>, 27.24% of phosphorus and 19.53% of Cl<span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"=""><sup>-</sup></span>. 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.
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<sup>2<span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"="">-</span></sup>, 20.57% of K<sup>+</sup>, 27.24% of phosphorus and 19.53% of Cl<span style="color:#4F4F4F;font-family:-apple-system, " font-size:14px;white-space:normal;background-color:#ffffff;"=""><sup>-</sup></span>. 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.
作者
Merzouki Hasna
Hnini Rachid
Brhich Amina
Ellaite Mohammed
Hanine Hafida
Lekhlif Brahim
Mandi Laila
Bahi Lahoucine
Merzouki Mohammed
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)
