Residues of the transformation of halieutics products: An alternative substrate for energy valorization of wastes by methanisation for a local sustainable development (preliminary results)

The purpose of this study is to evaluate the biogas productivity potential of residues of the transformation of halieutics products. Experiments were conducted in two digesters of PUXIN model of 20 m3, where the temperature is 35°C. Multirae analyser was used to know the composition of biogas produced. A gas counter was also used for counting the amount of biogas produced during the experiment. There was also a balloon of storage of 10 m3 downstream from the digester, for storing the biogas produced. The total volume with 2970 kg of substrate was 9.67 m3. The maximum daily volume of produced biogas was 1.561 m3 at the 5th day after the installation of the gas counter. The potential biogas is then, 3.25 m3/T of wastes. While the potential biogas found in earlier study is 53 m3/T of wastes. For analyses of produced biogas, maximum percentages of methane, oxygen, carbon monoxide and hydrogen sulfide are, respectively 91%, 20.9%, 196 ppm and 44.7 ppm. Method of cooking halieutics products with biogas takes much time than that using wood of heating.   Key words: Substrate, biogas, potential biogas, digester.