Organic waste characterization and evaluation of its potential biogas [Caractérisations des déchets organiques et évaluation du potentiel biogaz]

Biogas is the result of the anaerobic digestion of the organic matter. in this work,we undertook a series of experiments,to characterize and ferment the various substrates and to produce flammable biogas. waste of internal organs of chicken meat presents a weak ratio c/n of 2,42 but the potential methanogene is most important among the waste studied with 15,68 m3/t. that is because there is a large fraction of lipids (32%) in its dry matter. waste of the animalery from the university is characterized by ratio c/n of 8,21,higher with the presence of sawdusts,which leadsto a methanogenepotential of 11,52 m3/t in the second place. chicken meat droppings present a ratio c/n of 3,68 which makes it possible to have a potential methanogenes of 11,24 m3/t. the fish scrap is characterized by the weakest ratio c/n of 1,23 leading to the production of the lowest potential methanogene 6,64 m3/t,this result is related to the presence of a large proteinic fraction (70%). this work allowed us to conclude that between 32°c and 45°c the biogas production is correctly conducted. the chemical compositions of the wastes studied bring the necessary nutrients; mainly (zinc,cuivre,calcium,nickel and potassium) to the anaerobic bacteriadevelopment. at the end of the anaerobicdigestion,the digestat obtained keep all mineral fertilizers which makes it possible to use as an agriculturaloutput. this work opens new horizons towardan alternative of the development in the moroccans rural area,and at the same time proposes a renewable energy allowing a better management of organic waste,the production of flammable gas and also a fertilizing mud for the amendment of the grounds. in order to complete this work,other experiments are put in prospect. they will be devoted to the design and construction of an operational fermentor adapted to the moroccan conditions.