Energetic Valorization of Biomethane Produced from Cow-Dung

The anaerobic digestion offers an advantageous alternative to landfilling, incineration and composting since it is considered as the most appropriate treatment solution. Indeed, the biogas naturally produced by the fermentation of organic waste into anaerobic digesters, contains between 40 and 60% of methane, which gives it fuel character and its valorisation allows energy conservation while protecting the environment by reducing the greenhouse gases emission. This process corresponds perfectly to the policy of sustainable development. The objective of this paper is to popularize the technique of organic waste biomethanisation or anaerobic digestion in order to produce renewable energy and cleaner environment through the exploitation of research results. In this work, we used as support the experimental results obtained in the laboratory. The mesophilic anaerobic digestion of cowdung, into an experimental digester of 800 liters capacity, has produced 26.478 m3 of biogas for 77 days with an average optimal composition of 61% in methane and energy equivalent to 592.8 MJ (164.5 kWh). These results are hopeful for the use of cattle wastes mass available in Algeria, or even household wastes.