Research Outputs
Treatment of landfill leachates from Fez city (Morocco) using a sequence of aerobic and Fenton processes
This study aims: (a) to characterize the raw leachate generated in the landfill of Fez city, and (b) to evaluate the feasibility to apply an aerobic treatment followed by a Fenton oxidation process. The aerobic treatment was conducted in a suspended grow bioreactor during 60 days. The bioreactor was monitored every 3 days, following the variation of pH, chemical oxygen demand (COD), biochemical oxygen demand (BOD5), turbidity, conductivity, color number (CN), total suspended solids (TSS), nitrates (NO3−-N), nitrites (NO2−-N), and the absorbance values of the UV–vis spectrum. Results showed an elimination of41%, 31%, 50%, 52%, and 37%, on COD, BOD5, color number (CN), NO2−-N and NO3−-N, respectively. Thereafter, a Fenton oxidation process was successfully applied to the biological pre-treated leachate, improving the removal of COD, BOD5 and color to 73%, 99.5% and 94%, respectively.
Optimization of Fenton process operating conditions for the treatment of the landfill leachate of Fez city (Morocco)
In this work, the landfll leachate of Fez city (Morocco) is characterized physicochemically and the feasibility to apply a Fenton process is evaluated. A design of experiments based on Box–Behnken combined with a response surface methodology was used to assess the efect of three operating variables (pH, Fe2+ and H2O2 dosages) on two target responses: COD and color removal. The results of the analysis of variances demonstrate that both responses are signifcantly afected by Fe2+ dosage and pH. Statistical and graphical analyses show that maximum efciencies of 85% and 96% are obtained in terms of COD and color removal, respectively, when operating conditions are set in pH=2.8, [Fe2+]=1621 mg L−1 and [H2O2]=2500 mg L−1.