Attenuation of municipal landfill leachate through land treatment

The treatment of municipal landfill’s leachate is considered as one of the most significant environmental issues. inthis study a laboratory experiment was conducted through land treatment, achieving an efficient and economicalmethod by using vetiver plant. moreover, the effects of land treatment of leachate of municipal landfills on thenatural reduction of organic and inorganic contaminants in the leachate after the pre-treatment in the aradkouhdisposal center are invested. three pilots including the under-investigation region’s soil planted by vetiver plant, theregion’s intact soil pilot and the artificial composition of the region’s soil including the natural region’s soil, sand,and rock stone are used. the leachate, having passed its initial treatment, passed through the soil and to the pilot.it was collected in the end of the pilots and its organic and inorganic contaminants were measured. however, theland treatment of leachate was conducted in a slow rate at various speeds. according to the results, in order toremove cod, bod5, tds, tss, toc the best result was obtained in the region’s soil planted with vetiver plantand at the speed of 0.2 ml per minute which resulted 99.1%, 99.7%, 52.4%, 98.8%, 94.9% removal efficiencies,respectively. it also can be concluded that the higher the organic rate load is, the lower the efficiency of theremoval would be. in addition, ec & ph were measured and the best result was obtained in the region’s soilplanted with vetiver plant and at the speed of 0.2 ml/min.