Abstract
In this work, we worked on the removal of pollution discharges stabilized leachate produced by the landfill of the city of Mohammedia using the process of the biodegradation of organic pollutants in air continuously or discontinuously. In order to predict the efficiency of a biological treatment for this type of effluent while minimizing the cost of ventilation. Landfill leachates produced by fermentation of waste are considered as a dangerous source of pollution to the environment. These waters are loaded with highly toxic metal and organic pollutants. They are difficult to treat and constitute a pollutant element for their quantitative and qualitative aspect. Discharges used in this study are characterized by a charge rich of high organic pollution more or less biodegradable, and whose NTK often greatly exceeds 1 g.L-1. The physico-chemical characteristics of leachate showed that the organic mater is readily biodegradable since COD/BOD5 ratio varies between 4.8 and 7.4. The results of this study showed that the continuous ventilation discharge leachate has a removal efficiency of 48 % COD neighbor which remains close to that obtained with the discontinuous aeration (52 %). This is accompanied by a variation of pH and the quantity of sludge biodegradation. No differences were observed between the aeration continuous and discontinuous.