The objective of this work is to determine the methanogenic potential of landfill waste. To do this, two types of tests were carried out. The first one is the pre-test of anaerobic digestion by incubation carried out in a 500 mL flask in which 50 g of waste is placed in contact with 350 mL of water and the second one is the pre-test of the anaerobic digestion by fermentation also carried out under the same conditions as the test for anaerobic digestion by incubation with the difference that in the latter case, inoculum (cow dung) is added up to 21.54g, i.e. 19.23 g of MV in order to respect an I/S ratio of 2. The production of biogas is measured by displacement of an acidified water solution to pH = 2 using an inverted test tube. The results showed that the waste is more favorable for anaerobic digestion by fermentation than for anaerobic digestion by incubation and that all the digesters operated at mesophilic temperature. Indeed, at the end of the experiment, a mass of 20 g produced; with the digester by fermentation 83.895 mL of biogas or 77.75 mL of methane for the waste and 34.307 mL of biogas or 30.25 mL of methane for the sand. With the digester by incubation 4.6 mL of biogas or 2.1 mL of methane for the waste and 4.35 mL of biogas or 2.05 mL of methane for the sand. These results clearly show that landfill waste can be recovered by anaerobic digestion and therefore the establishment of a biogas installation on site and will not only reduce GHGs but also recover the biogas in the form of electricity.
Keywords: Anaerobic digestion, methanogenic potential, biogas, landfill.