Physicochemical characterization of leachate discharge Fkih Ben Salah from Morocco

The waste generated by domestic and industrial activities,set dumpsite pose a risk of contamination of the groundwater in the region fkih ben salah flowing in aquifers composed of sand phosphates and phosphatic limestone. this consists mainly of organic matter (77.7%),and other waste such as tissues (6.1%),plastic and cardboard (5.1%),miscellaneous packaging (3.3 %),metals (1.8%) and the lenses (0.9%). therefore,it is necessary to study the environmental problems of the discharge through an assessment of the risk generated by the discharge of pollutants on the surrounding environment and particularly on water resources. it is with this objective that fits the job. it consists of a physicochemical characterization of leachate. the results of leachate analysis showed that the average value of ph is 4.7 (young leachate). the total hardness is 68.33 mg / l. leachate is very rich in organic matter (bod5 equal to 6697mgo2 / l),cod is 18026mgo2 / l. the bod5/cod ratio (0.34) is greater than 0.3 and marking a favorable biodegradability of leachate studied. viewpoint mineral composition,leachate is rich in total nitrogen ntk (2361mg / l),total phosphorus (144mg / l),orthophosphate (100.95 mg / l),sulphate (1326.87 mg / l) and chloride ion (2051.11 mg / l). however,heavy metals in the composition of leachate is very important. indeed,the concentrations of iron (59.03 mg / l) and zinc (8.59 mg / l) are abnormally high. as for copper and lead,their concentrations are on average 2 mg / l. analysis of these results,it is necessary a hybrid treatment physicochemical means (precipitation,coagulation,electrocautery,etc ...) followed by a biological process (biofilter) to reduce the pollution load generated by the leachate.