Optimization of Experimental Biomethanation Applied to Poultry Droppings for Better Energy Valorization

The fight against climate change is first and foremost passed by the reduction of greenhouse gases (GHG). Mainly in the form of methane CH4, the GHGs emitted by the waste originate from the decomposition of organic matter which is more commonly known as Anaerobic Digestion (AD) or Biomethanation. Livestock manure is one of the major hazards to the environment and human health due to the nuisances and pollution generated. The present study consists of optimizing the methane fermentation applied to poultry droppings. This optimization focuses on the daily monitoring of experimental digesters, on the physico-chemical characterization of the inputs used and on the study of the effect of temperature and inoculum changes on the daily production of biogas and its composition (CH4, CO2 and H2S). The main results show, on the one hand, that the stability of the DA process after initial filling depends on experimental conditions, the general characteristics of the anaerobic digester, the initial biomass activity and the nature of the introduced inoculum. On the other hand, the production of biogas is better at a temperature of 35°C than at a temperature of 55°C and the addition of the inoculum has improved the production of biogas and the CH4 content, especially the use Of liquid poultry digestate.