Effect of Cover Soil to Concentration of Ammonia, Nitrate, and Nitrite in Leachate with Bioreactor Landfill Simulation

Abstract

: Leachate is one of the wastes from the waste processing site that must be handled appropriately so as not to pollute the environment. One method of handling leachate is leachate recirculation. Ammonia contained in leachate can pollute the environment. This study simulated landfills in two bioreactors with recirculation leachate and the addition of water and distinguished them using (1) and without using cover soil (2). The study was conducted for 30 days. The parameters analysed were ammonia, nitrate, and leachate nitrite. The observations of the two bioreactors showed that the concentration of ammonia and nitrate in bioreactor 2 tended to be higher than in bioreactor 1. Nitrite concentrations did not show significant differences in the two bioreactors. Ammonia, nitrate, and nitrite compounds in both bioreactors have been formed since the beginning of the study even though they initially had relatively low values. The decrease in the height of the organic waste is faster in bioreactor 1 with a percentage of final waste reduction of 79.03%. The highest waste temperature occurs in bioreactor 2, which reaches 43 0 C. The pH of waste in both bioreactors tends to be neutral, while the pH of leachate in both bioreactors tends to be acidic.