Environmental, energy and agronomic valuations of industrial biomethanation applied to poultry biomass recovered in Tunisia

This work consists on the study of the methanic fermentation, applied to the chicken manure, at an industrial pilot digester of Hammam Sousse (Tunisia). The analytical monitoring of the digester has focused on the one hand, on the determination of certain characteristics of the chiken effluent by the analysis of the physicochemical and environmental parameters, and on the other hand, on energy monitoring by assessing the qualitative productivity of the produced biogas. Furthermore, the present study focused on the partial substitution of the Gross Sylvicole Compost (CSB), produced locally, by the chicken methacompost. The agronomic evaluation of the chicken methacompost was based on Acacia cyanophylla germination and plant growth. Upon completion of the experiment, the best assessments of the depollution on the liquid digestate are obtained at the setting basin. The interest of purification of the biogas was shown by comparing the results before and after purification in terms of gaseous composition and calorific value. The incorporation of chicken methacompost with the CSB haa a remarkable positive effect on germination, and consequently, on the growth of the seedlings, in terms of height and diameter.

Keywords: Industrial digester, chicken manure, depollution balances, gaseous composition, Calorific value, chicken methacompost.