Compared Performances of the Experimental Digesters of the Animal Biomass

Abstract

This study proposes to look further into experimentally of the effect of the variation of certain physicochemical parameters of anaerobic digestion on the quantitative gas productivity of four digesters of treating bovine dejections. Moreover, four digesters supplied with the avicolous droppings, in different concentrations of Dry Matter (DM), were followed. The assessments of depollution (Suspended Matter and Biological Demand for Oxygen) together with qualitative energy (gas composition and calorific value) were also appreciated. We can release particularly that: the quantity of bovine biogas produced is variable according to the parameters of digestion. It is maximum in the presence of high temperature and under mechanical agitation of the substrate introduced; the quantitative productivity is more interesting in the case of the digesters avicolous. It is more important with the increase of the concentration of solids; the digester with 8% DM presents attractive valuations of depollution and energy efficiency.

Keywords: Experimental biomethanisation; animal dejections; environmental performance; gas quantitative production; composition to methane; calorific value.