Valorization of natural porous materials in the treatment of leachate from the landfill uncontrolled city of Taza [Valorisation des matériaux naturels poreux dans le traitement des lixiviats de la décharge publique non contrôlée de la ville de Taza]

In morocco,one major concern remains the management of solid wastes and their by-products,including leachate and biogas. the leachates from the landfill uncontrolled town of taza,which are neither collected nor treated,are routed directly to the river larbaâ which delimits the north side the landfill,constitute grave sanitary and epidemiological risks. in order to cope with this challenge and contribute to sustainable rehabilitation of the landfill,this study to for goals from characterize these leachates and assess technical efficiency and yield socio-economic of treatment by infiltration-percolation on fixed natural materials appropriate to the local context. at first,we evaluated the performance of different adsorbents tested for leachate treatment,then we analyzed the results of the three best filtration supports of purification performance viewpoint. the physicochemical monitoring of these trials showed that this is an average reduction of pollution in terms of suspended matter (ss) in the order of respectively 90%,93% and 96%,an average reduction of the pollution in terms of the chemical oxygen demand (cod) of the order of respectively 91%,89% and 83% and an average reduction in the order of respectively 94%,90% and 91% in terms of the biological oxygen demand (bod) at the output of ash filter,of clay and that of the mixture of both,but with an increase of the ph and conductivity for the ash filter.