Quantitative And Qualitative Characterization Of The Energy Productivity Of Pilot Digesters Of Animal Manure

In the optics of the control of the conditions of the fermentaire medium for a better energy valorization of biogas, this study proposes, like main aim, the follow-up and the evaluation on the one hand, of the quantitative productivity of the biogas produced on an experimental scale starting from avicolous droppings, and starting from bovine dejections, and on the other hand, of the gas qualitative productivity (gas composition and calorific value) on the level of the whole of digesters (experimental avicolous, rural bovine and industrial avicolous). Such a work made it possible to arise the principal observations hereafter: - The combined effect of the mode of food and the nature of the substrate on the quantitative energy performances of the experimental biogas product which is in favor of the digesters supplied uninterrupted with the avicolous droppings. - The performance of a digester from gas production point of view primarily depends on the nature of the matters to ferment, the agitation of the substrate, the temperature maintained during digestion and also of the adjustment of the pH and the DM introduced. - Rural or industrial biogas, undergoing a stage of post processing, present of better energy potentialities especially at the industrial scale in which the increase in the LCV can reach 25%. The qualitative energy performances of the rural digester are relatively limited compared to those of the industrial digester. This is with the least effectiveness of the systems of production and conditioning of the biogases employed by this last.