Valorization of two biological materials in the treatment of tannery effluents by filtration

The present study aims at the valorization of two natural materials such as marine sand and wood sawdust in the treatment of tannery effluents taken directly from an industrial unit located in the Dokkarat, district of Fez. The technique used is that of column filtration. Physicochemical characterization such as COD,, Cr, etc. as well as microbiological analysis such as total germs (TG), Total Coliforms (TC), Faecal Coliforms (FC), etc. of the effluent, before and after filtration by the two supports used, were performed. The two filtering materials were previously characterized by DRX, IR-FTIR and SEM-EDX. The results obtained show that the latter two are effective in the treatment of the effluent, especially with the wood sawdust filter. Indeed, the removal rate (RR) of COD,, SS, EC, and Cr is in the order of 90.79%, 86.04%, 83.3%, 80%, 96.7% and 84.07% for the sawdust filter, while for the marine sand filter these values are of 81.5%, 79.9%, 79.2%, 66.6%, 94.4% and 56.15%, respectively