eng Science and Education Publishing Chemical Engineering and Science 2328-7373 2023-11-06 8 1 6 14 10.12691/ces-8-1-2 CES2023812 article Kokou Semeho Hundjoe ignacehundjoes@gmail.com 1 2 Komi Edem Koledzi 2 3 Maglwa Tcha-Thom 3 3 Nitale M¡¯Balikine Krou 4 Alaki-Issi Massimapatom Sema 4 Laboratoire de Gestion, Traitement et Valorisation des D¨¦chets (GTVD), Faculty of Science, Department of Chemistry, University of Lome, Togo Laboratoire Chimie Organique et Sciences de l¡¯Environnement (LaCOSE), Faculty of Science and Technology, Department of Chemistry, University of Kara, Togo In this work, a series of experiments were carried out on the methanogenic potential of the organic fraction of Household Waste and Similar consisting of food waste, green waste, paper-cardboard, wood and fines, to which treated leachate (L) from the Aképé Technical Landfill Center was added as inoculum. Composite samples HWS1 (rainy season) and HWS2 (dry season) from the year 2022 underwent physical-chemical characterisation followed by fermentation to produce flammable biogas, the methane content of which was determined. The HWS1 reactor gave a low methanogenic potential of 14.81×10-3m3Biogas/kgVM compared with the HWS2 reactor of 26.33×10-3m3Biogas/kgVM. The (HWS+L) reactors were mixed at a VM leachate/substrate ratio of 0.5, in order to optimize production. As a result, the (HWS1+L) mixing reactor gave a low methanogenic potential of 46.22×10-3m3Biogas/kgVM compared with the (HWS2+L) mixing reactor of 59.28×10-3m3Biogas/kgVM. The evolution and physico-chemical composition of the reaction media made it possible to monitor the progress of the experiments. It was concluded that wet-season substrates produce less biogas than dry-season substrates, and that the leachate can be used to increase the biogas rate, with the idea of valorising it. http://pubs.sciepub.com/ces/8/1/2/ces-8-1-2.pdf landfill methanogenic potential waste massifs biogas leachate