Comparison The Efficacy Of Fenton And “nZVI + H2O2” Processes In Municipal Solid Waste Landfill Leachate Treatment (Case Study: Hamadan Landfill Leachate)

Abstract

Leachate contains large amounts of pollutants, including organic and inorganic materials as well<br />as the types of pathogens. This study was performed with the aim of determining the efficiency of Fenton<br />and" nZVI(nanoparticles of zero valent iron) + H2O2" processes for reducing chemical oxygen demand (COD), 5-day biological oxygen demand (BOD5), total solids (TS)and color of Hamadan city landfill leachate.<br />Experiments were performed in batch reactor and main affected factors; pH, reaction time, concentration of<br />iron and H2O2 were investigated. Also the efficiency of processes was analyzed using One-Way ANOVA<br />statistical test and SPSS-13 software. The highest removal efficiencies obtained with “nZVI + H2O2" process<br />( 48.67%, 52%, 10.44% and 53% for COD, BOD5, TS and color, respectively in 2.5 g/L iron nanoparticles<br />concentration,29137 mg/L H2O2, pH = 2.5 and 60 min reaction time). Based on the results, the nZVI + H2O2 process can be applied as Hamadan city landfill leachate treatment to correct the BOD5/COD ratio to increase the biodegrability of this type of wastewater.