Leachate landfill treatment using plasma and Ozone

Abstract

Abstract Plasma discharge in liquid was used, and a combination system with plasma and ozone was tested looking for an effective reduction of organic material, cell growth, and discoloring process of leachate landfill. The treatments were divided into four groups and operated on three samples for leachate dilution using distilled water. The diluted samples were submitted to Ozone, plasma, plasma followed by Ozone, and Ozone, followed by plasma treatments. Microbiological and chemical oxygen demand (COD) analyses were performed for the initial leachate landfill and the products obtained after the treatments. The microbiological analyses showed that adding Ozone was most effective in reducing the bacterial load while using the plasma positively reduced COD. The best treatment strategy was first the application of plasma, followed by the addition of Ozone, which resulted in a 71% reduction of COD and an 81% decrease in bacteria growth. In comparison to results reported in the literature, the benchtop tests performed in this work demonstrated the effectiveness of the developed strategy.